阅读说明：本技术 用于马蹄形隧洞快速衬砌的装配式钢筋管片及装配方法 (Fabricated reinforced pipe sheet for rapid lining of horseshoe tunnel and assembling method ) 是由 张金良 曹国利 王美斋 张远生 田丰 陈丹 张钧睿 于 2019-11-09 设计创作，主要内容包括：本发明公开了用于马蹄形隧洞快速衬砌的装配式钢筋管片,包括封顶钢筋网块和至少一对侧墙钢筋网块,所述每对侧墙钢筋网块分别设置在封顶钢筋网块的两端并与封顶钢筋网块构成马蹄形,且封顶块和侧墙块之间具有锚固部,同时公开了利用该钢筋管片的装配方法,首先安装侧墙钢筋网块,然后安装封顶钢筋网块,进行封装后继续安装下一衬砌单元,直至完成马蹄形矿洞的所有衬砌,可在马蹄形隧洞内直接进行快速装配,无需现场捆扎,高效便捷。(The invention discloses an assembly type steel bar pipe piece for quickly lining a horseshoe-shaped tunnel, which comprises a capping steel bar net block and at least one pair of side wall steel bar net blocks, wherein each pair of side wall steel bar net blocks are respectively arranged at two ends of the capping steel bar net block and form a horseshoe shape with the capping steel bar net block, and an anchoring part is arranged between the capping block and the side wall block.)

1. A assembled reinforcing bar section of jurisdiction for the quick lining of horseshoe tunnel, its characterized in that: the steel bar net structure comprises a capping steel bar net block (1) and at least one pair of side wall steel bar net blocks (2), wherein each pair of side wall steel bar net blocks (2) are respectively arranged at two ends of the capping steel bar net block (1) and form a horseshoe shape with the capping steel bar net block (1);

the capping steel bar net block (1) comprises a plurality of first circumferential steel bars (11) and a plurality of first structural steel bars (12) which are bound together, the first circumferential steel bars (11) are sequentially arranged in parallel along the axis of a hole, the first structural steel bars (12) are sequentially arranged in parallel along the radial direction of the hole, and the first structural steel bars (12) and the first circumferential steel bars (11) are kept vertical;

the first circumferential steel bars (11) are arranged along the cross section of the tunnel, and the shape of the first circumferential steel bars (11) is consistent with the radian of the top of the horseshoe-shaped tunnel; the first annular steel bar (11) extends outwards along two ends of the cross section of the hole to form anchoring parts a (111) for connecting and anchoring the capping steel bar net block (1) and the side wall steel bar net block (2); first circumferential steel bars (11) between adjacent lining units are connected in an anchoring mode;

the single first construction steel bar (12) is arranged along the axial direction of the hole, the first construction steel bar (12) is U-shaped, the long side of each U-shaped is fixed on a first circumferential steel bar (11), the open end of the first construction steel bar (12) is bent inwards and extends out of an anchoring part c (121) for anchoring the first construction steel bar (12) in the adjacent lining unit;

the side wall steel bar net block (2) comprises a plurality of second circumferential steel bars (21) and a plurality of second structural steel bars (22) which are bound together, the second circumferential steel bars (21) are sequentially arranged in parallel along the axis of a hole, the second structural steel bars (22) are sequentially arranged in parallel along the radial direction of the hole, and the second structural steel bars (22) and the second circumferential steel bars (21) are kept vertical;

the second circumferential steel bars (21) are arranged along the cross section of the tunnel, and the shape of the second circumferential steel bars (21) is consistent with the radian of the side surface of the horseshoe-shaped tunnel; an anchoring part d (211) extends outwards from the second circumferential steel bar (21) along the upper end of the section of the hole and is used for connecting and anchoring the side wall steel bar net block (2) and the capping steel bar net block (1)/the adjacent side wall steel bar net block (2); an anchoring part e (212) extends outwards from the second circumferential steel bar (21) along the lower end of the section of the hole, and the anchoring part e (212) is used for anchoring the side wall steel bar net block (2) and the adjacent side wall steel bar net block (2)/concrete bottom plate; second circumferential reinforcing steel bars (21) in the adjacent lining units are anchored;

the single second construction steel bar (22) is arranged along the axial plane direction of the hole, the second construction steel bar (22) is U-shaped, the long edge of each U-shaped steel bar is fixed on the second circumferential steel bar (21), the opening end of the second construction steel bar (22) is bent inwards, and an anchoring part g (221) extends outwards, so that the anchoring of the second construction steel bar (22) in the adjacent lining units is realized.

2. The fabricated rebar tube sheet of claim 1, wherein: at least one lining element is present, in which element:

a plurality of fasteners (3) protruding inwards are arranged on the anchoring part a (111) of the first circumferential reinforcing steel bar (11), and a plurality of corresponding fastening holes (4) are arranged in the corresponding area of the second circumferential reinforcing steel bar (21) and the anchoring part a (111);

for the side wall reinforcing steel bar net block (2) directly adjacent to the capping reinforcing steel bar net block (1), a plurality of fasteners (3) protruding outwards are arranged on the anchoring part d (211) on the second circumferential reinforcing steel bar (21), and a plurality of corresponding fastening holes (4) are arranged in the corresponding area of the first circumferential reinforcing steel bar (11) and the anchoring part d (211).

3. The fabricated rebar tube sheet of claim 2, wherein: the fastening piece (3) comprises a pin head (31) and a shaft body (32) which are arranged on a fixed plane, and a through shaft hole (33) is formed in the part, close to the lower end, of the shaft body (32); the fastening hole (4) is integrally T-shaped, a moving plate (41) is arranged at the bottom of the vertical section of the fastening hole, transmission pieces (42) are fixedly arranged at two ends of the top of the moving plate (41), a stop block (43) lower than the transmission pieces (42) is arranged in the middle of the moving plate (41), and the bottom of the moving plate (41) is connected with the bottom of the fastening hole (4) through a spring; the transmission part (42) is a gear-rack pair, the circle center of the gear is fixed at a certain point on the corresponding side wall, a sleeve (44) is vertically arranged on the inner end face of the gear, a fixed shaft (45) is sleeved inside the sleeve (44) through threads, the fixed shaft (45) can be screwed in or out relative to the sleeve (44), and when the fastening part (3) is located at the lowest end of the fastening hole (4), the fixed shaft (45) can enter the shaft hole (33) to lock the fastening part (3) and the fastening hole (4).

4. The fabricated rebar tube sheet of claim 1, wherein: when the height of the horseshoe-shaped tunnel is not more than 5m, the number of the side wall steel bar net blocks (2) is 1 pair.

5. An assembling method using the assembled reinforcing steel pipe sheet according to any one of claims 1 to 4, characterized in that: the method comprises the following steps:

s1: dividing the horseshoe-shaped tunnel lining into different tunnel lining units along the axial direction of the tunnel, wherein the length of each tunnel lining unit is 2-4 m;

s2: determining the size and the shape of a capping reinforcing steel bar net block (1) and a side wall reinforcing steel bar net block (2) according to the size of a horseshoe-shaped tunnel lining, and simultaneously determining the logarithm of the side wall reinforcing steel bar net block (2) in each tunnel lining unit; binding the steel bars in a steel bar processing factory outside the tunnel;

s3: in any lining unit, firstly connecting each pair of side wall steel bar net blocks (2) through the dowel bars reserved on the reinforced concrete bottom plate by the anchoring parts f, and then hoisting the capping steel bar net blocks (1) to the steel bar net blocks (2) of the two side walls by using a hoisting machine for assembling;

s4: sequentially installing side wall steel bar net blocks (2) and capping steel bar net blocks (1) in the adjacent lining units according to the sequence of S3, and anchoring the steel bar net blocks in the adjacent lining units;

s5: after the lining of a certain area is fixed, erecting a template, plugging and pouring concrete, wherein if no other poured lining units are arranged around the lining unit, two-side plugging is needed; if the adjacent side of the lining unit is the poured lining unit, blocking the lining unit at one side;

s6: and repeating the steps S3-S5 until the whole lining of the whole horseshoe tunnel is completed.

6. The assembly method of claim 4, wherein: and a pore which is less than 200mm is reserved at the joint surface between the reinforcing steel bar net blocks in the different lining units.

7. The assembly method of claim 4, wherein: in the step S2, the binding process needs to take into account the deformation error range during transportation and installation.

8. The assembly method of claim 4, wherein: in the step of S2, in the process of determining the shapes and the sizes of the top-sealing steel bar net block (1) and the side wall steel bar net block (2), the joint of the top-sealing steel bar net block (1) and the side wall steel bar net block (2) is prevented from being in a state of large stress.

Technical Field

The invention relates to the technical field of cast-in-place concrete lining of tunnels, in particular to an assembly type reinforcement pipe sheet for rapid lining of a horseshoe-shaped tunnel and an assembly method.

Background

The horseshoe tunnel is a common type in a hydraulic tunnel, the construction speed of the horseshoe tunnel lining has great influence on the progress and safety of the project, and the construction speed of the lining is limited by binding of reinforcing steel bar pipe pieces (reinforcing steel bar net blocks) in the tunnel. At present, the binding and welding of the reinforcing mesh blocks of the tunnel lining are mostly carried out in the tunnel, and the binding and welding efficiency of the reinforcing mesh blocks is very low under the influence of space and illumination. In addition, dust and smoke generated in the process of binding and welding a large number of steel bars are difficult to dissipate in the holes, and the health of field workers is seriously endangered.

The Chinese patent CN201210286548.8 discloses a construction method for binding secondary lining reinforcing steel bars of a large-span tunnel arch based on a skeleton beam, wherein the bound secondary lining reinforcing steel bars of the tunnel arch comprise an outer layer reinforcing mesh, an inner layer reinforcing mesh and vertical connecting bars for connecting the outer layer reinforcing mesh and the inner layer reinforcing mesh, and the construction method comprises the following steps: firstly, mounting a framework beam: a plurality of framework beams are arranged below the primary supporting structure of the tunnel arch part from front to back; the framework beams are arched beams with the same radius as the outer layer reinforcing mesh, and a plurality of framework beams form a bearing structure of secondary lining reinforcing steel bars of the tunnel arch part; secondly, binding the secondary lining reinforcing steel bars of the tunnel arch part, wherein the binding process is as follows: the outer layer of reinforcing mesh is bound on the upper parts of the plurality of framework beams, and then the inner layer of reinforcing mesh is suspended on the outer layer of reinforcing mesh through the vertical connecting ribs. Although the invention can realize the rapid binding of the lining reinforcing steel bars of the tunnel, the temporary assembly is still required in the tunnel, the invention has no practicability for the small horseshoe-shaped tunnel, and various dusts and smog generated in the construction process can cause environmental and health problems.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an assembly type reinforcement pipe sheet for rapid lining of a horseshoe-shaped tunnel and an assembly method, which can be directly and rapidly assembled in the horseshoe-shaped tunnel without on-site bundling and are efficient and convenient.

In order to achieve the purpose, the invention provides the following technical scheme:

the assembled reinforcing steel bar pipe sheet method for quickly lining the horseshoe-shaped tunnel comprises a top-sealing reinforcing steel bar net block and at least one pair of side wall reinforcing steel bar net blocks, wherein each pair of side wall reinforcing steel bar net blocks are respectively arranged at two ends of the top-sealing reinforcing steel bar net block and form a horseshoe shape with the top-sealing reinforcing steel bar net block;

the capping steel bar net block comprises a plurality of first circumferential steel bars and a plurality of first structural steel bars which are bound together, the first circumferential steel bars are sequentially arranged in parallel along the axis of the hole, the first structural steel bars are sequentially arranged in parallel along the radial direction of the hole, and the first structural steel bars and the first circumferential steel bars are kept vertical;

the first circumferential steel bars are arranged along the cross section of the tunnel, and the shape of the first circumferential steel bars is consistent with the radian of the top of the horseshoe-shaped tunnel; the first annular steel bar extends outwards along two ends of the cross section of the hole to form anchoring parts a for connecting and anchoring the top-sealing steel bar net block and the side wall steel bar net block; anchoring and connecting first circumferential steel bars between adjacent lining units;

the single first construction steel bar is arranged along the axial direction of the hole, the first construction steel bar is U-shaped, the long side of each U-shaped steel bar is fixed on the first circumferential steel bar, and the open end of the first construction steel bar is bent inwards and extends out of an anchoring part c for anchoring the first construction steel bar in the adjacent lining unit;

the side wall steel bar net block comprises a plurality of second circumferential steel bars and a plurality of second structural steel bars which are bound together, the second circumferential steel bars are sequentially arranged in parallel along the axis of the hole, the second structural steel bars are sequentially arranged in parallel along the radial direction of the hole, and the second structural steel bars and the second circumferential steel bars are kept vertical;

the second circumferential reinforcing steel bars are arranged along the cross section of the tunnel, and the shape of the second circumferential reinforcing steel bars is consistent with the radian of the side surface of the horseshoe-shaped tunnel; the second circumferential steel bar extends outwards along the upper end of the section of the hole to form an anchoring part d for connecting and anchoring the side wall steel bar net block and the capping steel bar net block/the adjacent side wall steel bar net block; an anchoring part e extends outwards from the second circumferential steel bar along the lower end of the section of the hole, and the anchoring part e is used for anchoring the side wall steel bar net block and the adjacent side wall steel bar net block/concrete bottom plate; anchoring second circumferential reinforcing steel bars in the adjacent lining units;

the single second structure reinforcing bar sets up along hole axial plane direction, the second structure reinforcing bar is "U" type and the long limit of every U type all is fixed in the second on the annular reinforcing bar, the open end of second structure reinforcing bar inwards buckles and extends out anchor portion g, realizes the anchor of second structure reinforcing bar in the adjacent lining cutting unit.

Description of the drawings: the reinforcing steel bar segment can be directly and quickly assembled in the tunnel without being tied up on site, and is efficient and convenient; realize between the muscle section of jurisdiction, muscle section of jurisdiction and concrete bottom plate, the muscle section of jurisdiction of different lining cutting units through the anchor, can fully reach the intensity of anchor, exert the effect of muscle section of jurisdiction. In order to ensure the structural strength of the capping steel bar duct piece and the side wall steel bar duct piece, the capping steel bar duct piece and the side wall steel bar duct piece can be fixed in a mechanical connection (sleeve) mode and a welding fixing mode.

Preferably, there is at least one lining element in which:

a plurality of fasteners protruding inwards are arranged on the anchoring part a of the first circumferential steel bar, and a plurality of corresponding fastening holes are arranged in the corresponding area of the second circumferential steel bar and the anchoring part a;

for the side wall reinforcing steel bar net block directly adjacent to the capping reinforcing steel bar net block, a plurality of fasteners protruding outwards are arranged on the anchoring part d on the second circumferential reinforcing steel bar, and a plurality of corresponding fastening holes are arranged in the corresponding area of the first circumferential reinforcing steel bar and the anchoring part d.

Description of the drawings: for lining units at certain positions, the lining units need to bear larger stress, in order to avoid the cracking of the top-sealing steel bar net block and the side wall steel bar net block, a fastening piece and a fastening hole are added to realize mechanical locking on the basis of welding and fixing, and the fastening piece and the fastening hole are integrally formed when the steel bar net blocks are bundled, so that the lining unit is convenient to use.

The fastening piece comprises a pin shaft head and a shaft body which are arranged on the fixed plane, and a through shaft hole is formed in the part, close to the lower end, of the shaft body; the whole fastening hole is T-shaped, a moving plate is arranged at the bottom of the vertical section of the fastening hole, transmission parts are fixedly arranged at two ends of the top of the moving plate, a stop block lower than the transmission parts is arranged in the middle of the moving plate, and the bottom of the moving plate is connected with the bottom of the fastening hole through a spring; the transmission part is a gear-rack pair, the circle center of the gear is fixed at a fixed point on the corresponding side wall, the inner end face of the gear is vertically provided with a sleeve, a fixed shaft is sleeved inside the sleeve through threads, the fixed shaft can be screwed in or out relative to the sleeve, and when the fastening part is located at the lowest end of the fastening hole, the fixed shaft can enter the shaft hole to lock the fastening part and the fastening hole.

It is shown that the fastener and the fastening hole can realize insertion-self locking, can realize locking by applying thrust in the hoisting process, does not need additional manual steps, is simple and efficient,

preferably, when the height of the horseshoe-shaped tunnel is not more than 5m, the number of the side wall steel bar net blocks is 1 pair.

The method has the advantage that the steel bar net blocks on the side wall do not need to be disassembled again for the horseshoe tunnel lower than 5 m.

An assembling method using the assembled reinforced pipe sheet comprises the following steps:

s1: dividing the horseshoe-shaped tunnel lining into different tunnel lining units along the axial direction of the tunnel, wherein the length of each tunnel lining unit is 2-4 m;

s2: determining the sizes and the shapes of the top-sealing reinforcing steel bar net block and the side wall reinforcing steel bar net block according to the size of the horseshoe-shaped tunnel lining, and simultaneously determining the logarithm of the side wall reinforcing steel bar net block in each tunnel lining unit; binding the steel bars in a steel bar processing factory outside the tunnel;

s3: in any lining unit, firstly connecting each pair of side wall reinforcing steel bar net blocks on a reinforcing steel bar concrete bottom plate through an anchoring part f, and then hoisting the capping reinforcing steel bar net blocks to the two side wall reinforcing steel bar net blocks by using a hoisting machine for assembling; the concrete fixing mode adopts sleeve and welding to ensure the stress strength of the structure;

s4: sequentially installing side wall steel bar net blocks and capping steel bar net blocks in the adjacent lining units according to the sequence of S3, and anchoring the steel bar net blocks in the adjacent lining units;

s5: after the lining of a certain area is fixed, erecting a template, plugging and pouring concrete, wherein if no other poured lining units are arranged around the lining unit, two-side plugging is needed; if the adjacent side of the lining unit is the poured lining unit, blocking the lining unit at one side;

s6: and repeating the steps S3-S5 until the whole lining of the whole horseshoe tunnel is completed.

Description of the drawings: by using the method, the rapid lining of the horseshoe tunnel can be simply and rapidly realized without checking the size of the steel bars again on site and binding on site; meanwhile, in the installation process of the lining unit provided with the locking piece/locking hole, after the top-sealing steel bar net block is hoisted to a position between the two side wall steel bar net blocks by using a hoisting machine, a thrust force can be directly exerted to enable the fastener on the anchoring part a to be inserted into the fastening hole on the second circumferential steel bar and the fastener on the anchoring part d to be inserted into the fastening hole on the first circumferential steel bar, so that the side wall steel bar net block and the top-sealing steel bar net block are locked;

preferably, the joint surface between the steel bar net blocks in the different lining units is provided with a pore which is less than 200 mm.

Description of the drawings: the holes between the reinforcing steel bar net blocks are convenient for installation, but certain bearing capacity and stability are influenced when the holes are too large, so the holes are preferably below 200 mm.

Preferably, in the step S2, the banding process needs to take into consideration the deformation error range during transportation and installation.

Preferably, in step S2, in the process of determining the shapes and sizes of the top-sealing steel bar mesh block and the side wall steel bar mesh block, the joint between the top-sealing steel bar mesh block and the side wall steel bar mesh block is prevented from being under a large stress.

Description of the drawings: for each lining unit, the joint between different steel mesh blocks inevitably loses some bearing force, so that points with larger stress are avoided as connecting parts when the lining unit is disassembled.

Compared with the prior art, the invention has the beneficial effects that:

(1) the assembled duct pieces can be bundled and produced outside the holes, and are directly assembled in the holes after being transported without being bundled on site;

(2) the assembled duct piece is provided with a plurality of anchoring parts, so that the anchoring strength and the standard bearing capacity can be realized again;

(3) in the connection of the top-sealing steel bar net block and the side wall steel bar net block, the connecting part is generally positioned at a place with larger stress and is a main cracking end and a fragile end, so that a locking part is added at the connecting part of the top-sealing steel bar net block and the side wall steel bar net block for mechanical locking, and the annular bearing force and the longitudinal bearing force are increased;

(4) the locking part adopts the fastening part and the fastening hole, so that automatic locking can be realized by adding only one axial thrust in the hoisting process of the hoisting machine, and manual operation is not needed;

(5) the device has practicability for large, medium and small U-shaped tunnels, and large instruments are not required to be used for bundling and welding on site.

(6) The rapid lining of different lining units can be rapidly realized by utilizing the assembling pipe pieces, so that the rapid lining of the whole horseshoe-shaped tunnel is realized.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is a schematic diagram (one) of the splicing process of embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of splicing of embodiment 1 of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 6 is a schematic structural view of example 2 of the present invention;

FIG. 7 is a schematic view showing the structure of a fastener and a fastening hole in embodiment 2 of the invention;

FIG. 8 is a schematic view of a fastener and fastener hole of the present invention in a deadlocked condition;

FIG. 9 is a schematic view of the construction of a transmission in a fastening hole of the present invention;

FIG. 10 is a schematic structural view of example 3 of the present invention;

in the figure, 1-capping reinforcing steel bar net block, 11-first circumferential reinforcing steel bar, 111-anchoring part a, 12-first constructional reinforcing steel bar, 121-anchoring part c, 2-side wall reinforcing steel bar net block, 21-second circumferential reinforcing steel bar, 211-anchoring part d, 212-anchoring part e, 22-second constructional reinforcing steel bar, 221-anchoring part g, 3-fastening piece, 31-pin shaft head, 32-pin shaft body, 33-shaft hole, 4-fastening hole, 41-moving plate, 42-transmission piece, 43-stop block, 44-sleeve and 45-fixed shaft.

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.