阅读说明：本技术 现浇综合管廊模板支撑结构和现浇综合管廊施工方法 (Cast-in-place comprehensive pipe gallery formwork supporting structure and cast-in-place comprehensive pipe gallery construction method ) 是由 杨硕 刘勇 徐霖 龙腾 于东亮 何弘睿 武振伟 王宇 董瑞峰 申建强 张强 曹 于 2020-12-23 设计创作，主要内容包括：本发明提供了一种现浇综合管廊模板支撑结构和现浇综合管廊施工方法,涉及综合管廊施工技术领域,该支撑结构包括内支撑体系和外支撑体系；所述内支撑体系设置于综合管廊内,用于在所述综合管廊完成浇筑前,支撑组成所述综合管廊内壁的模板；所述外支撑体系设置于所述综合管廊外,用于在所述综合管廊完成浇筑前,支撑组成所述综合管廊外壁的模板；其中,所述外支撑体系包括砖墙,所述砖墙的高度与所述综合管廊的顶板齐平,用于支撑组成所述综合管廊两外侧壁的模板。本发明采用砖墙代替用于支撑管廊两外侧壁的模架,以此实现了单侧支模形式,克服了狭窄施工场地作业空间不足的问题。(The invention provides a cast-in-place comprehensive pipe gallery formwork supporting structure and a cast-in-place comprehensive pipe gallery construction method, and relates to the technical field of comprehensive pipe gallery construction; the inner support system is arranged in the comprehensive pipe rack and used for supporting templates forming the inner wall of the comprehensive pipe rack before the comprehensive pipe rack is poured; the external support system is arranged outside the comprehensive pipe gallery and used for supporting the templates forming the outer wall of the comprehensive pipe gallery before the comprehensive pipe gallery is poured; wherein, the outer support system includes the brick wall, the height of brick wall with utility tunnel's roof flushes for the support is constituteed the template of two lateral walls of utility tunnel. The invention adopts the brick wall to replace the die carrier for supporting the two outer side walls of the pipe gallery, thereby realizing the form of a single-side die and overcoming the problem of insufficient operation space of a narrow construction site.)

1. The utility model provides a cast-in-place utility tunnel template bearing structure which characterized in that includes:

an inner support system and an outer support system;

the inner support system is arranged in the comprehensive pipe rack and used for supporting templates forming the inner wall of the comprehensive pipe rack before the comprehensive pipe rack is poured;

the external support system is arranged outside the comprehensive pipe gallery and used for supporting the templates forming the outer wall of the comprehensive pipe gallery before the comprehensive pipe gallery is poured;

wherein, the outer support system includes brick wall (1), the height of brick wall (1) with utility tunnel's roof flushes for the support constitutes the template of two lateral walls of utility tunnel.

2. The support structure of claim 1, wherein the inner support system comprises: longitudinal wall template support system, roof template support system and scute (14), wherein:

the longitudinal wall formwork support system is used for supporting the formwork forming the inner side wall of the comprehensive pipe gallery;

the top plate template supporting system is used for supporting templates forming the top of the inner wall of the comprehensive pipe gallery;

the corner plate (14) is used for connecting the longitudinal wall formwork supporting system and the roof formwork supporting system.

3. The support structure of claim 2, wherein the vertical wall form support system comprises:

the longitudinal wall bamboo plywood (1) is arranged in a manner of being tightly attached to the formwork forming the inner side wall of the comprehensive pipe gallery;

the bamboo plywood comprises longitudinal wall main keels (2), wherein the longitudinal wall main keels (2) are longitudinally arranged, one side surface of each longitudinal wall main keel (2) is connected with a longitudinal wall bamboo plywood (1), the other side surface of each longitudinal wall main keel is provided with a plurality of longitudinal wall secondary keels (3) which are vertically arranged, and the longitudinal wall secondary keels (3) are perpendicular to the longitudinal wall main keels (2);

the T-shaped bolts (5) are arranged on the side wall of the comprehensive pipe gallery and are used for penetrating through the longitudinal wall bamboo plywood (1) and the longitudinal wall main keels (2), one end of each T-shaped bolt is connected with a template forming the inner side wall of the comprehensive pipe gallery, and the other end of each T-shaped bolt is connected with the longitudinal wall secondary keel (3);

the transverse supports (7) are arranged in a plurality of ways from bottom to top along the longitudinal direction, two ends of each transverse support (7) are connected with the corresponding longitudinal wall secondary keel (3) through an adjustable support (10), and the arrangement density of the transverse supports (7) at the upper part is greater than that of the transverse supports (7) at the lower part;

one end of each scissor support (8) is connected with the longitudinal wall secondary keel (3) which is positioned at the uppermost end and connected with the transverse support (7), and the other end of each scissor support (8) is connected with a template forming the bottom plate in the comprehensive pipe gallery;

bracing (9), the one end of bracing (9) with along vertically upwards count the second way horizontal support (7) are connected vertical wall secondary joist (3) are connected, and the other end and constitution the template of utility tunnel infrabasal plate is connected.

4. The support structure of claim 3, wherein a plurality of compartments are provided within the utility tunnel; the vertical wall formwork support system further comprises:

a plurality of split bolts (6), set up in on the both sides wall between the adjacent cabin of utility tunnel, be used for running through hug closely the both sides wall indulge wall bamboo plywood (1) with indulge wall main joist (2), its both ends respectively with install in two of adjacent cabin inside wall indulge wall secondary joist (3) are connected.

5. The support structure of claim 2, wherein the roof form support system comprises:

the top plate bamboo plywood (17) is arranged in a manner of being tightly attached to the template forming the top plate in the comprehensive pipe gallery;

the top plate main keels (18) are arranged in the transverse direction, one side face of each top plate main keel (18) is connected with the top plate bamboo rubber plate (17), the other side face of each top plate main keel (18) is provided with a plurality of top plate secondary keels (11) arranged in the longitudinal direction, and the top plate secondary keels (11) are perpendicular to the top plate main keels (18);

support pole setting (12), many support pole setting (12) set up along vertical direction, the top of supporting pole setting (12) through adjustable support (10) with roof secondary joist (11) are connected, the bottom through adjustable support (10) with constitute the template of utility tunnel infrabasal plate is connected.

6. The support structure of claim 1 or 4, wherein the vertical wall form support system further comprises:

the concrete structure blocks (4) are placed on built-in reinforcing steel bars along a direction perpendicular to the brick walls (1), and the built-in reinforcing steel bars are positioned between the templates forming the inner side wall of the comprehensive pipe gallery and the templates forming the outer side wall of the comprehensive pipe gallery and between the two templates forming the inner side wall of the adjacent cabin of the comprehensive pipe gallery;

the concrete structure block (4) is provided with a limiting groove (19), and the inner diameter of the limiting groove (19) is matched with the outer diameter of the built-in steel bar.

7. The support structure of claim 1, wherein the outer support system further comprises:

concrete cushion (16), with the bottom of brick wall (1) is connected, is used for supporting the constitution the template of utility tunnel exterior soleplate.

8. The support structure of claim 1, wherein the utility tunnel is cast in two portions, the support structure further comprising, when the utility tunnel reaches a first cast concrete height:

stagnant water steel sheet (15), stagnant water steel sheet (15) are located and constitute the template of utility tunnel inside wall with constitute central point between the template of utility tunnel lateral wall puts.

9. A construction method of a cast-in-place comprehensive pipe gallery is characterized by comprising the following steps:

excavating a foundation pit, and pretreating the foundation pit;

arranging a support structure in the foundation pit; the support structure is a cast-in-place comprehensive pipe gallery formwork support structure as claimed in any one of claims 1 to 8;

and under the support of the support structure, pouring of the comprehensive pipe gallery is completed.

10. The construction method according to claim 9, further comprising:

after the concrete is poured for the first time to the comprehensive pipe gallery and reaches the preset height, the supporting structure is dismantled after the concrete is solidified until the concrete meets the standard requirement;

it is right before the utility tunnel concreting for the second time, constitute install on the template of utility tunnel bearing structure.

Technical Field

The invention relates to the technical field of comprehensive pipe gallery construction, in particular to a cast-in-place comprehensive pipe gallery formwork supporting structure and a cast-in-place comprehensive pipe gallery construction method.

Background

The utility tunnel is a municipal infrastructure which centralizes gas, water supply, power communication, heat supply and the like in municipal pipelines to implement unified planning, design, construction, management, operation and enclosure, not only solves the problem of urban traffic and promotes the maintenance and operation of municipal services, but also effectively avoids the phenomenon that the urban maintenance underground pipelines repeatedly excavate roads, keeps the integrity of the road surface, is convenient for the laying, maintenance and management of various pipelines, saves space, improves the space utilization rate, reduces the damage of ecological environment and ensures the sustainable development of cities.

The utility tunnel has become one of the important contents of city infrastructure construction, and the construction of present cast-in-place utility tunnel mainly adopts the form of "fastener formula steel pipe scaffold adds the wood pattern" because it installs and removes convenience, sparingly economy. However, for the comprehensive pipe gallery with extremely narrow construction space, the form of 'fastener type steel pipe scaffold and wood formwork' is adopted for construction, and the formwork cannot be erected outside the pipe gallery. And the pipeline is laid along the road more, is located the intensive place of stream of people, and too much road space is also occupied to the mode of setting up of pipe support, and construction period is longer, influences pedestrian's vehicle's normal traffic.

Disclosure of Invention

The embodiment of the invention provides a cast-in-place comprehensive pipe gallery formwork supporting structure and a cast-in-place comprehensive pipe gallery construction method, which adopt a single-side formwork form for construction and can overcome the technical problems.

In order to solve the above problems, the embodiment of the present invention discloses a cast-in-place utility tunnel formwork support structure, which comprises:

an inner support system and an outer support system;

the inner support system is arranged in the comprehensive pipe rack and used for supporting templates forming the inner wall of the comprehensive pipe rack before the comprehensive pipe rack is poured;

the external support system is arranged outside the comprehensive pipe gallery and used for supporting the templates forming the outer wall of the comprehensive pipe gallery before the comprehensive pipe gallery is poured;

wherein, the outer support system includes the brick wall, the height of brick wall with utility tunnel's roof flushes for the support is constituteed the template of two lateral walls of utility tunnel.

In an embodiment of the present invention, the inner support system includes: longitudinal wall template support system, roof template support system and scute, wherein:

the longitudinal wall formwork support system is used for supporting the formwork forming the inner side wall of the comprehensive pipe gallery;

the top plate template supporting system is used for supporting templates forming the top of the inner wall of the comprehensive pipe gallery;

and the angle plate is used for connecting the longitudinal wall formwork supporting system with the top plate formwork supporting system.

In an embodiment of the present invention, the formwork support system for a vertical wall includes:

the longitudinal wall bamboo plywood is arranged in a manner of being tightly attached to the formwork forming the inner side wall of the comprehensive pipe gallery;

the main longitudinal wall keels are longitudinally arranged, one side surface of each main longitudinal wall keel is connected with the bamboo plywood of the longitudinal wall, the other side surface of each main longitudinal wall keel is provided with a plurality of secondary longitudinal wall keels arranged in the vertical direction, and the secondary longitudinal wall keels are perpendicular to the main longitudinal wall keels;

the T-shaped bolts are arranged on the side wall of the comprehensive pipe gallery and are used for penetrating through the longitudinal wall bamboo plywood and the longitudinal wall main keel, one end of each T-shaped bolt is connected with a template forming the inner side wall of the comprehensive pipe gallery, and the other end of each T-shaped bolt is connected with the longitudinal wall secondary keel;

the transverse supports are arranged from bottom to top along the longitudinal direction, two ends of each transverse support are connected with the longitudinal wall secondary keel through adjustable support supports, and the arrangement density of the transverse supports at the upper part is greater than that of the transverse supports at the lower part;

one end of each cross brace is connected with the longitudinal wall secondary keel which is positioned at the uppermost end and connected with the transverse support, and the other end of each cross brace is connected with a template forming the bottom plate in the comprehensive pipe gallery;

the utility model discloses a utility tunnel, including utility tunnel, bracing, the one end of bracing with vertically upwards count the second along horizontal support is connected the vertical wall secondary joist is connected, the other end with constitute the template of utility tunnel infrabasal plate is connected.

In an embodiment of the present invention, a plurality of cabins are disposed in the utility tunnel; the vertical wall formwork support system further comprises:

a plurality of split bolts set up in on the both sides wall between the adjacent cabin of utility tunnel, be used for running through hug closely the both sides wall indulge wall bamboo plywood with indulge wall main joist, its both ends respectively with install in two of adjacent cabin inside wall indulge wall secondary joist and connect.

In one embodiment of the present invention, the ceiling formwork support system comprises:

the top plate bamboo plywood is arranged in a manner of being tightly attached to the template forming the top plate in the comprehensive pipe gallery;

the top plate main keels are arranged in the transverse direction, one side face of each top plate main keel is connected with the top plate bamboo plywood, the other side face of each top plate main keel is provided with a plurality of top plate secondary keels arranged in the longitudinal direction, and the top plate secondary keels are perpendicular to the top plate main keels;

support the pole setting, many support the pole setting along vertical direction setting, the top of supporting the pole setting through adjustable brace with roof secondary joist connects, the bottom through adjustable brace with constitute the template of utility tunnel infrabasal plate is connected.

In an embodiment of the present invention, the vertical wall form supporting system further includes:

the concrete structure blocks are placed on built-in reinforcing steel bars along a direction perpendicular to the brick walls, and the built-in reinforcing steel bars are positioned between the templates forming the inner side wall of the comprehensive pipe gallery and the templates forming the outer side wall of the comprehensive pipe gallery and between the two templates forming the inner side wall of the adjacent cabin of the comprehensive pipe gallery;

and the concrete structure block is provided with a limiting groove, and the inner diameter of the limiting groove is matched with the outer diameter of the built-in steel bar.

In an embodiment of the present invention, the external support system further includes:

the concrete cushion, with the bottom of brick wall is connected, is used for supporting the constitution the template of utility tunnel outer bottom plate.

In an embodiment of the present invention, the utility tunnel is cast twice, and when the utility tunnel reaches the first cast concrete height, the support structure further includes:

the stagnant water steel sheet, the stagnant water steel sheet is located and constitutes the template of utility tunnel inside wall with constitute central point between the template of utility tunnel lateral wall puts.

In order to solve the problems, the embodiment of the invention also discloses a construction method of the cast-in-place comprehensive pipe gallery, which comprises the following steps:

excavating a foundation pit, and pretreating the foundation pit;

arranging a support structure in the foundation pit; the supporting structure is a cast-in-place comprehensive pipe gallery formwork supporting structure according to any one of the embodiments of the invention;

and under the support of the support structure, pouring of the comprehensive pipe gallery is completed.

In an embodiment of the present invention, the method further includes:

after the concrete is poured for the first time to the comprehensive pipe gallery and reaches the preset height, the supporting structure is dismantled after the concrete is solidified until the concrete meets the standard requirement;

it is right before the utility tunnel concreting for the second time, constitute install on the template of utility tunnel bearing structure.

The embodiment of the invention has the following advantages:

the embodiment of the invention comprises an inner support system and an outer support system; the inner support system is arranged in the comprehensive pipe rack and used for supporting templates forming the inner wall of the comprehensive pipe rack before the comprehensive pipe rack is poured; the external support system is arranged outside the comprehensive pipe gallery and used for supporting the templates forming the outer wall of the comprehensive pipe gallery before the comprehensive pipe gallery is poured; the outer support system comprises a brick wall, the height of the brick wall is flush with the top plate of the comprehensive pipe gallery, and the brick wall is used for supporting templates forming two outer side walls of the comprehensive pipe gallery; the embodiment of the invention adopts the brick wall to replace a die set for supporting two outer side walls of the pipe gallery, thereby realizing a single-side die form, solving the problem of insufficient operation space of a narrow construction site, avoiding backfilling between the outer wall of the comprehensive pipe gallery and a foundation pit at the later stage, having simple construction, being a great remarkable progress for the construction of the comprehensive pipe gallery in the narrow space, and solving the problems that a large amount of soil needs to be backfilled between the outer wall of the comprehensive pipe gallery and the foundation pit after the pouring of the comprehensive pipe gallery is completed in the prior art, and the backfilling soil is inconvenient due to too narrow space between the brick wall and the foundation pit, the process for backfilling the soil is overhigh (the backfilling soil needs to be backfilled tightly, the collapse is prevented, the process requirement is higher), the cost is higher and the like.

The concrete structure block placed on the built-in steel bar structure of the comprehensive pipe gallery can prevent the problem that the space between bamboo plywood plates of longitudinal walls on two sides of each wall of the pipe gallery is smaller than the design width of the wall of the pipe gallery due to over-tightening of the split bolt and over-long adjustment of the adjustable supports at two ends of the transverse support, and can effectively ensure the construction quality of the pipe gallery.

According to the arrangement mode of the transverse supports, the cross braces, the inclined braces and the like and the method of pouring in two times, the waterproof performance of the comprehensive pipe gallery can be guaranteed, and the problem that the engineering quality is affected due to the fact that the surface of the wall of the pipe gallery is uneven and even deforms excessively caused by cast-in-place concrete expansion can be solved.

The formwork support system provided by the embodiment of the invention has the advantages that each part is small in size, the material turnover is convenient, the formwork support system is directly transported to a construction site after being processed in a factory, the site processing amount is small, and the site safety and civilized management is convenient.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structure view of a formwork support structure of a cast-in-place utility tunnel according to an embodiment of the present invention;

FIG. 2 is a schematic view of the utility tunnel of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a functional schematic of a utility tunnel compartment according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a concrete structural block according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating steps of a cast-in-place utility tunnel construction method according to an embodiment of the present invention.

Description of reference numerals:

1-longitudinal wall bamboo plywood; 2-main keel of longitudinal wall; 3-longitudinal wall secondary keel; 4-concrete structural blocks; 5-T bolt; 6-split bolts; 7-transverse support; 8-a cross brace; 9-inclined strut; 10-adjustable support; 11-roof secondary joist; 12-supporting vertical rods; 13-brick wall; 14-corner panels; 15-water stop steel plate; 16-concrete bedding; 17-top board bamboo plywood; 18-roof main runners; 19-a limit groove;

a-the inner wall of the comprehensive pipe rack; b-the outer wall of the comprehensive pipe gallery.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility tunnel is generally laid in a busy city zone along a road, when the working space outside the pipe gallery is insufficient and the formwork outside the pipe gallery cannot be erected, the formwork supporting structure of the cast-in-place utility tunnel provided by the invention effectively optimizes the traditional supporting system, can be in a limited space, and adopts brick walls 13 to replace the formwork for supporting the two outer side walls of the pipe gallery, so that a single-side formwork form is realized, so that the problem of insufficient working space of a narrow construction site is solved, and the soil does not need to be backfilled between the outer wall of the utility tunnel and a foundation pit in the later period, so that the construction of the utility tunnel in the narrow space is a significant progress, the problems that a large amount of soil needs to be backfilled between the outer wall of the utility tunnel and the foundation pit after the pouring of the utility tunnel is completed in the prior art, and the backfilling soil is inconvenient due to over-narrow condition and the process for backfilling soil is overhigh (the backfilling soil needs to be tightly backfilled, preventing collapse, so the process requirement is higher), the cost is higher and the like.

Referring to fig. 1, a schematic cross-sectional structure diagram of a cast-in-place utility tunnel formwork support structure according to an embodiment of the present invention is shown, and the support structure may include:

an inner support system and an outer support system;

the inner support system is arranged in the comprehensive pipe rack and used for supporting the templates forming the inner wall of the comprehensive pipe rack before the comprehensive pipe rack is poured;

the outer support system is arranged outside the comprehensive pipe rack and used for supporting the templates forming the outer wall of the comprehensive pipe rack before the comprehensive pipe rack is poured;

wherein, outer support system includes brick wall 13, and the height of brick wall 13 flushes with utility tunnel's roof for support the template of constituteing two lateral walls of utility tunnel.

The invention will not be described more in relation to the specific noun explanation of the utility tunnel, which is described with reference to the prior art. Referring to fig. 2, which shows a schematic diagram of the utility tunnel in fig. 1, arrow a in fig. 2 indicates the inner wall of the utility tunnel, arrow B indicates the outer wall of the utility tunnel, the inner wall and the outer wall are both defined by the position of the template, and the distance between two adjacent templates indicates the wall thickness of the utility tunnel. In practice, different compartments may be provided in the utility tunnel, which comprises a utility compartment and a natural gas compartment, as shown in fig. 3.

The outer support system comprises a brick wall 13, which brick wall 13 may be a 240mm thick plastered brick wall 13.

Although the formwork erection mode is still adopted on the inner side of the comprehensive pipe gallery, the inner support system provided by the invention is different from the prior art in consideration of the fact that the comprehensive pipe gallery belongs to underground engineering, the top plate and the wall body are thick, the waterproof performance requirement is high, and the top plate and the wall body are required to be continuously poured once, so that the cast-in-place concrete expansion phenomenon is easily caused, the structural appearance is influenced slightly, and the engineering construction quality, safety, durability and the like are influenced seriously. Specifically, the internal support system comprises: longitudinal wall template support system, roof template support system and scute 14, wherein: the longitudinal wall formwork support system is used for supporting the formworks forming the inner side wall of the comprehensive pipe gallery; the top plate template supporting system is used for supporting the templates forming the top of the inner wall of the comprehensive pipe gallery; and corner panels 14 for connecting the vertical wall formwork support system and the roof formwork support system.

In an embodiment of the present invention, the formwork support system for a vertical wall includes: the longitudinal wall bamboo plywood 1 is arranged in a manner of being tightly attached to the formwork forming the inner side wall of the comprehensive pipe gallery; the vertical wall main keel 2 is longitudinally arranged, one side surface of the vertical wall main keel 2 is connected with the vertical wall bamboo plywood 1, the other side surface of the vertical wall main keel 2 is provided with a plurality of vertical wall secondary keels 3 arranged along the vertical direction, and the vertical wall secondary keels 3 are perpendicular to the vertical wall main keel 2; the T-shaped bolts 5 are arranged on the side wall of the comprehensive pipe gallery and are used for penetrating through the longitudinal wall bamboo plywood 1 and the longitudinal wall main keels 2, one end of each T-shaped bolt is connected with a template forming the inner side wall of the comprehensive pipe gallery, and the other end of each T-shaped bolt is connected with the longitudinal wall secondary keel 3; the transverse supports 7 are arranged along the longitudinal direction from bottom to top, two ends of each transverse support 7 are connected with the longitudinal wall secondary keel 3 through adjustable support struts 10, and the arrangement density of the upper transverse supports 7 is greater than that of the lower transverse supports 7; one end of each shear brace 8 is connected with the longitudinal wall secondary keel 3 connected with the transverse support 7 positioned at the uppermost end, and the other end of each shear brace 8 is connected with a template forming the bottom plate in the comprehensive pipe gallery; bracing 9, the one end of bracing 9 is connected with vertical wall secondary joist 3 of following the vertical second of upwards counting 7 connections of horizontal support, and the other end is connected with the template of constituteing utility tunnel infrabasal plate.

The bamboo plywood is a building material which is formed by using a moso bamboo material as a main framework and a filling material and performing high-pressure blank forming. Because the bamboo plywood has high hardness, bending resistance and compression resistance, the invention adopts the bamboo plywood (comprising the bamboo plywood 1 for the longitudinal wall and the bamboo plywood for the top plate) to replace a steel formwork, thereby effectively reducing the cost of the supporting structure and being more convenient to disassemble and assemble.

Many indulge wall main joist 2 along vertical setting, and many indulge wall main joist 2 along utility tunnel's pipeline laying direction parallel arrangement promptly, two piece adjacent indulge the interval between the wall main joist 2 and can set up to 200mm, it can be wood purlin to indulge wall main joist 2.

Many longitudinal wall secondary joist 3 set up along vertical direction, and 3 foundation ditch depth directions of many longitudinal wall secondary joist are from up setting down promptly, and interval between two adjacent longitudinal wall secondary joist 3 can set up to 450mm, longitudinal wall secondary joist 3 can be double-rack pipe.

The T-shaped bolt 5 comprises a bolt rod and a transverse support 7 head, wherein the bolt rod and the transverse support 7 head are perpendicular to each other. All be provided with the mounting hole on vertical wall bamboo plywood 1, vertical wall main joist 2 and the vertical wall secondary joist 3, this mounting hole and T type bolt 5's shank of bolt external diameter phase-match. Be provided with built-in reinforcing bar in the utility tunnel wall, built-in reinforcing bar is located the constitution promptly the template of utility tunnel inside wall with constitute between the template of utility tunnel lateral wall to it is fixed respectively with these two templates. During the connection, the shank of the bolt of T type bolt 5 passes vertical wall secondary joist 3, vertical wall main joist 2, vertical wall bamboo plywood 1 in proper order and constitutes the template connection of utility tunnel inside wall, and 7 horizontal supports of T type bolt 5 then block at the surface of vertical wall secondary joist 3 to this has realized vertical wall secondary joist 3, vertical wall main joist 2 and vertical wall bamboo plywood 1 and the fixed of the template of constituteing the utility tunnel inside wall, in order to support this template. The connection mode of the bolt rod of the T-shaped bolt 5 and the template forming the inner side wall of the comprehensive pipe gallery is not limited in the invention, and the bolt rod and the template can be screwed, welded, clamped and the like.

In practice, as the utility tunnel has a certain height, in order to avoid the problems that the expansion die protrudes into the cabin of the utility tunnel due to the expansion die of cast-in-place concrete, the cabin space of the utility tunnel is occupied, and the stability of the whole structure is affected, the embodiment of the invention is further provided with a transverse support 7, a cross support 8 and an inclined support 9.

Wherein, multichannel horizontal braces 7 sets up from bottom to top along vertical, and the both ends of every horizontal brace 7 are connected with its longitudinal wall secondary joist 3 that is located same water flat line through adjustable brace 10, provide 7 power of horizontal brace for utility tunnel's inside wall. Because the concrete expansion phenomenon occurs more at the middle upper part of the comprehensive pipe gallery, when a plurality of transverse supports 7 are arranged, the arrangement density of the upper part of the transverse supports 7 is greater than that of the lower part of the transverse supports 7. As shown in fig. 1, five transverse supports 7 are counted from bottom to top on the same cross section, the step pitch of the first, second and third transverse supports 7 is 1200mm, and the step pitch of the fourth and fifth transverse supports 7 is 1500 mm. For the convenience of disassembly, two ends of the transverse support 7 of the invention are supported on the longitudinal wall secondary keel 3 through the adjustable support 10, and the transverse support 7 can ensure that the longitudinal wall secondary keel 3 has transverse acting force through adjusting the length of the adjustable support 10.

Referring to fig. 1, bridging 8 adopts two bracing piece cross connection to form, is similar to the scissors, provides the space holding power for utility tunnel's inside wall, maintains the stability in utility tunnel cabin. The upper end of bridging 8 is connected with the vertical wall secondary joist 3 that is located the top, and the lower extreme top is on the template of constituteing utility tunnel infrabasal plate. The longitudinal step between the upper and lower ends of the scissor supports 8 may be 2000 mm.

Referring to fig. 1, form a stable triangular space between bracing 9 and utility tunnel's the inside wall, can effectively increase the rigidity of structure and increase the shock resistance of structure. The longitudinal step between the upper end of the diagonal brace 9 and the formwork that makes up the floor in the utility tunnel may be 1200 mm.

As shown in fig. 1-3, in one embodiment of the present invention, a plurality of compartments may be disposed within the utility tunnel; therefore, the vertical wall formwork support system of the embodiment of the invention may further include: a plurality of split bolts 6 set up on the both sides wall between the adjacent cabin of utility tunnel for run through the vertical wall bamboo plywood 1 and the vertical wall main joist 2 of hugging closely the both sides wall, its both ends are connected with two vertical wall secondary joist 3 of installing in adjacent cabin inside wall respectively. In the invention, the arrangement of the split bolt 6 can ensure the stability between two adjacent cabins. The T-shaped bolt 5 and the split bolt 6 can adopt a water stop bolt.

In an embodiment of the present invention, the vertical wall form supporting system further includes: the concrete structure blocks 4 are placed on the built-in reinforcing steel bars along the direction perpendicular to the brick wall 13, and the built-in reinforcing steel bars are positioned between the templates forming the inner side wall of the comprehensive pipe gallery and the templates forming the outer side wall of the comprehensive pipe gallery and between the two templates forming the inner side wall of the adjacent cabin of the comprehensive pipe gallery; wherein, the concrete structure block 4 is provided with a limiting groove 19, and the inner diameter of the limiting groove 19 is matched with the outer diameter of the built-in steel bar (not shown).

In fig. 1, each concrete structure block 4 is represented by a line, and the present invention is provided with a plurality of concrete structure blocks 4 in the longitudinal direction. Referring to fig. 4, which shows a schematic structural diagram of the concrete structure block 4 according to the embodiment of the present invention, it can be seen from fig. 4 that the concrete filled between the filling shadow of the concrete structure block 4 and the formwork of the utility tunnel is the same substance, so that the formed utility tunnel has uniform material, which is beneficial to maintaining the overall strength. The setting of spacing groove 19 can guarantee the stability after concrete structure piece 4 installs.

The plurality of concrete structure blocks 4 can apply transverse acting force to the templates forming the inner side wall of the utility tunnel and the templates forming the outer side wall of the utility tunnel, can avoid the deformation of the templates forming the inner side wall of the utility tunnel towards the direction close to the brick wall 13, and is beneficial to keeping the uniformity of the thickness of the side wall of the utility tunnel. A plurality of concrete structure pieces 4 that are located between two templates that constitute the adjacent cabin inside wall of utility tunnel can apply transverse force to two templates that constitute the adjacent cabin inside wall of utility tunnel, can avoid the process between two adjacent cabins to be close to, inhomogeneous between the wall thickness, influence the problem of cabin overall stability.

In one embodiment of the present invention, referring to fig. 1, a ceiling formwork support system includes: the top plate bamboo plywood 17 is arranged close to the template forming the top plate in the comprehensive pipe gallery; the top plate main keels 18 are transversely arranged, one side face of each top plate main keel 18 is connected with a top plate bamboo rubber plate 17, the other side face of each top plate main keel 18 is provided with a plurality of top plate secondary keels 11 arranged in the longitudinal direction, and the top plate secondary keels 11 are perpendicular to the top plate main keels 18; support pole setting 12, many support pole settings 12 set up along vertical direction, and the top of supporting pole setting 12 is connected with roof secondary joist 11 through adjustable brace 10, and the bottom is connected with the template of constituteing the utility tunnel infrabasal plate through adjustable brace 10.

Many roof main joist 18 are along horizontal setting, and many roof main joist 18 are evenly laid according to predetermineeing the interval and are just parallel to each other between two inside walls of utility tunnel promptly, and the interval between two adjacent roof main joist 18 can set up less into 200mm to guarantee to form the outrigger to the template of constituteing the utility tunnel roof.

Many roof secondary joist 11 set up along longitudinal direction, and many roof secondary joist 11 are along utility tunnel's pipeline laying direction parallel arrangement promptly, and roof secondary joist 11 is perpendicular with utility tunnel's inside wall. The distance between two adjacent top plate secondary keels 11 can be set to 900mm, and the top plate secondary keels 11 can be wood purlins.

For the convenience of disassembly, the top end of the supporting upright rod 12 is supported on the top plate secondary keel 11 through the adjustable support 10, the bottom end of the supporting upright rod is supported on the templates forming the bottom plate in the utility tunnel through the adjustable support 10, and the supporting upright rod 12 can be guaranteed to have a longitudinal acting force on the top plate secondary keel 11 through adjusting the length of the adjustable support 10, so that the top plate bamboo plywood 17 is tightly connected with the templates forming the top plate in the utility tunnel.

During specific connection, the angle plate 14 is respectively fixed with the longitudinal wall bamboo plywood 1 and the top plate bamboo plywood 17, no gap is required at a contact part during connection, and leakage of cast-in-place concrete is avoided.

In an embodiment of the present invention, the outer support system further includes: and the concrete cushion 16 is connected with the bottom end of the brick wall 13 and used for supporting the templates forming the outer bottom plate of the comprehensive pipe gallery. Referring to fig. 1, the concrete cushion 16, the concrete structural blocks 4 of the present invention and the concrete poured between the formworks of the utility tunnel are all made of the same material, so as to ensure the uniformity of the material of the formed utility tunnel, which is beneficial to maintaining the overall strength of the utility tunnel.

In an embodiment of the present invention, in order to prevent a serious formwork expansion problem caused by an excessively high one-time cast concrete height under a condition of single-side formwork support, and to ensure a waterproof performance of the whole pipe gallery, the whole pipe gallery is cast twice, and when the pipe gallery reaches a first cast concrete height, the support structure further includes: stagnant water steel sheet 15, stagnant water steel sheet 15 are located the central point between the template of constituteing the utility tunnel inside wall and the template of constituteing the utility tunnel lateral wall and put. The water stop steel plate 15 is welded on a built-in steel bar (not shown) in the wall of the comprehensive pipe gallery and can be used for water prevention. Regarding the waterproof function and the placement of the waterproof steel plate 15, the present invention will not be described herein, and reference may be made to the description of the prior art.

Based on the same inventive concept, an embodiment of the present invention further provides a cast-in-place utility tunnel construction method, and referring to fig. 5, a flowchart of steps of the cast-in-place utility tunnel construction method according to the embodiment of the present invention is shown, and the method may include:

step S501, excavating a foundation pit and preprocessing the foundation pit;

after excavation of the foundation pit, the pretreatment step comprises the following steps: and (5) well performing foundation pit supporting work, finishing foundation treatment, and preparing a concrete cushion 16 of the comprehensive pipe gallery.

Step S502, arranging a supporting structure in a foundation pit; the supporting structure is a cast-in-place comprehensive pipe gallery formwork supporting structure in the embodiment of the invention;

wherein, the step may specifically include:

and building a brick wall 13 on the outer side of the pipe gallery in the foundation pit, plastering the brick wall with concrete, and building the top plate of which the building height requirement reaches the comprehensive pipe gallery.

Binding built-in steel bars (not shown) on a bottom plate and a 60cm high wall of the comprehensive pipe gallery, completing corresponding template installation according to a template distribution diagram of the comprehensive pipe gallery, welding a water stop steel plate 15 on the built-in steel bars (not shown) at the center position of each wall of the comprehensive pipe gallery, and pouring concrete;

binding the reinforcing steel bars of the longitudinal wall after the strength of the concrete meets the requirements of relevant specifications, placing a concrete structure block 4 in an internal reinforcing steel bar (not shown in the figure), welding T-shaped bolts 5 at corresponding positions of two inner side walls of the comprehensive pipe gallery, punching holes at positions of the bamboo plywood 1 of the longitudinal wall where the T-shaped bolts 5 are installed and opposite-pulling bolts 6, and then installing bamboo plywood; the T-shaped bolt 5 and the split bolt 6 are externally used for reinforcing the longitudinal wall main keel 2 and the longitudinal wall secondary keel 3 on the longitudinal wall bamboo plywood 1;

the installation supports pole setting 12, horizontal support 7, bridging 8, bracing 9, roof secondary joist 11 and roof main joist 18, roof bamboo plywood 17, scute 14 to adjust and consolidate adjustable brace 10 that supports 7 both ends and support adjustable brace 10 at pole setting 12 top, here installation is gone on simultaneously to the piping lane top and along the piping lane extending direction from the piping lane bottom, when up installation supports pole setting 12 from down promptly, horizontal support 7 is installed at the relevant position, and adjust the adjustable brace 10 at both ends, consolidate vertical wall bamboo plywood 1. The method specifically comprises the following steps: the top plate secondary keel 11, the top plate main keel 18 and the top plate bamboo plywood 17 are placed on the adjustable support 10 at the top of the support upright stanchion 12, meanwhile, a plurality of support upright stanchions 12 are installed along the extending direction of the pipe gallery, and meanwhile, the cross braces 8 and the inclined braces 9 are installed at corresponding positions.

And S503, completing pouring of the comprehensive pipe gallery under the support of the support structure.

After the installation of the supporting structure of the embodiment of the invention is finished, the reinforcing steel bars of the top plate are bound, the longitudinal wall and the top plate of the comprehensive pipe gallery are subjected to concrete pouring between the template forming the inner wall of the comprehensive pipe gallery and the template forming the outer wall of the comprehensive pipe gallery, the concrete of the flat top plate is smeared after the pouring is finished, the top plate of the outer die is installed, and the pouring of the comprehensive pipe gallery is finished.

And finally, after the concrete of the comprehensive pipe gallery is maintained to meet the relevant standard requirements, the internal support system is dismantled, sundries on the longitudinal wall bamboo plywood 1 and the top plate bamboo plywood 17 are cleaned, and the longitudinal wall bamboo plywood and the top plate bamboo plywood are transported to the next comprehensive pipe gallery construction site.

In an embodiment of the present invention, the method may further include:

after the concrete is poured for the first time to the comprehensive pipe gallery and reaches the preset height, the supporting structure is dismantled after the concrete is solidified until the concrete meets the standard requirement;

before the utility tunnel is concreted for the second time, mounting a supporting structure on the templates forming the utility tunnel.

The height can be 60 cm's vertical wall height for the aforesaid predetermines, divides twice pouring mode, can guarantee utility tunnel stability and intensity more effectively, reduces cast in situ concrete expand mould and causes the problem that pipe gallery wall surface unevenness, even warp too big and influence engineering quality.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should also be noted that, in this document, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Moreover, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions or should not be construed as indicating or implying relative importance. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.

The technical solutions provided by the present invention are described in detail above, and the principle and the implementation manner of the present invention are described in this document by using specific examples, and the description of the above examples is only for assisting understanding of the present invention, and the content of the present description should not be construed as limiting the present invention. While various modifications of the illustrative embodiments and applications herein will be apparent to those skilled in the art, it is not desired to be exhaustive or exhaustive that all such modifications and variations are within the scope of the invention.