阅读说明：本技术 一种分块拼接式预制混凝土箱涵及其施工工艺 (Block spliced precast concrete box culvert and construction process thereof ) 是由 王雨 胡广华 冯晓楠 熊辉 骆强 刘朵 张建东 管玉见 侯攀峰 杨庆辉 黄丽华 于 2020-06-03 设计创作，主要内容包括：本发明涉及预制装配式涵洞的技术领域,尤其涉及一种分块拼接式预制混凝土箱涵及其施工工艺。包括顶板涵片、底板涵片、侧板涵片、锚固构造和紧固构造。所述顶板涵片为盖体结构,盖接在所述侧板涵片上；所述侧板涵片为L型结构,包括垂直端和水平端；所述垂直端支撑所述顶板涵片；所述水平端与所述底板涵片连接；所述锚固构造设置在所述底板涵片和所述侧板涵片上；所述紧固构造设置在所述顶板涵片和所述侧板涵片上；用于紧固所述顶板涵片和所述侧板涵片的连接。本发明的目的就是针对现有技术中存在的缺陷提供一种分块拼接式预制混凝土箱涵及其施工工艺,降低施工成本,减少运输过程中的风险,提高施工效率。(The invention relates to the technical field of prefabricated culverts, in particular to a block splicing type prefabricated concrete box culvert and a construction process thereof. Comprises roof culvert pieces, bottom plate culvert pieces, side plate culvert pieces, anchoring structures and fastening structures. The top plate culvert pieces are of cover body structures and are connected to the side plate culvert pieces in a covering mode; the side plate culvert piece is of an L-shaped structure and comprises a vertical end and a horizontal end; the vertical ends support the roof culvert pieces; the horizontal end is connected with the bottom plate culvert piece; the anchoring structures are arranged on the bottom plate culvert pieces and the side plate culvert pieces; the fastening structures are arranged on the top plate culvert pieces and the side plate culvert pieces; the connecting device is used for fastening the connection of the roof culvert pieces and the side plate culvert pieces. The invention aims to provide a block splicing type precast concrete box culvert and a construction process thereof aiming at the defects in the prior art, so that the construction cost is reduced, the risk in the transportation process is reduced, and the construction efficiency is improved.)

1. A block splicing type precast concrete box culvert and a construction process thereof are characterized by comprising top plate culvert pieces (1), bottom plate culvert pieces (2), side plate culvert pieces (3), an anchoring structure and a fastening structure; the roof culvert pieces (1) are of cover body structures and are covered and connected on the side plate culvert pieces (3); the side plate culvert pieces (3) are of L-shaped structures and comprise vertical ends and horizontal ends; the vertical ends support the roof culvert pieces (1); the horizontal end is connected with the bottom plate culvert piece (2); the anchoring structures are arranged on the bottom plate culvert pieces (2) and the side plate culvert pieces (3) and are used for anchoring the connection between the bottom plate culvert pieces (2) and the side plate culvert pieces (3); the fastening structures are arranged on the roof culvert pieces (1) and the side plate culvert pieces (3); is used for fastening the connection of the roof culvert pieces (1) and the side plate culvert pieces (3).

2. The block-spliced precast concrete box culvert and the construction process thereof according to claim 1, wherein the anchoring structure comprises an anchoring notch (401), an anchoring embedded steel plate (402), an anchoring steel plate (403) and a finish-rolled deformed steel bar (404); the anchoring notches (401) are of L-shaped opening structures and are respectively arranged at the two ends of the bottom plate culvert piece (2) and the top of the vertical end of the side plate culvert piece (3); the anchoring embedded steel plates (402) are respectively inserted into the two ends of the bottom plate culvert piece (2) and the top of the vertical end of the side plate culvert piece (3) along the direction of the anchoring notch (401); the finish-rolled deformed steel bar (404) and the anchoring embedded steel plate (402) are arranged in a crossed mode; the anchoring steel plate (403) is arranged at the tail part of the finish-rolled deformed steel bar (404).

3. The block-spliced precast concrete box culvert and the construction process thereof according to claim 2, wherein the fastening structure comprises a fastening notch (501), a fastening embedded steel plate (502), a reserved hole (503) and a U-shaped notch (504); the fastening notches (501) are of L-shaped opening structures and are respectively arranged on the inner wall of the roof culvert piece (1) and the end part of the horizontal end of the side plate culvert piece (3); the fastening embedded steel plates (502) are respectively inserted into the inner wall of the roof culvert piece (1) and the end part of the horizontal end of the side plate culvert piece (3) along the direction of the fastening notch (501); the reserved hole channel (503) is matched with the finish-rolled deformed steel bar (404) for realizing connection; the U-shaped notch (504) is arranged at the tail part of the reserved hole (503).

4. The block-spliced precast concrete box culvert and the construction process thereof according to claim 3, further comprising a prestressed duct (6); the prestressed duct (6) is arranged at the right angle of the roof culvert piece (1) and the side plate culvert piece (3).

5. The block-spliced precast concrete box culvert and the construction process thereof according to claim 4, wherein waterproof rubber strips (7) are arranged at the joints among the roof culvert pieces (1), the floor culvert pieces (2) and the side plate culvert pieces (3).

6. The block-spliced precast concrete box culvert and the construction process thereof according to claim 5, wherein the fastening slot (501) and the anchoring slot (401) are spliced to form a sand-filling slot and are used for filling concrete mortar (8).

7. The block-spliced precast concrete box culvert and the construction process thereof according to claim 6, wherein the construction process comprises the following steps:

firstly, excavating a groove with a rectangular cross section in a construction site according to design requirements, and mechanically flattening the groove foundation;

secondly, vertically placing one bottom plate culvert piece (2) on a flat foundation, aligning the finish-rolled deformed steel bar (404) fixed on the bottom plate culvert piece (2) and penetrating through the reserved pore channels (503) arranged on the two side plate culvert pieces (3); after the finish-rolled deformed steel bar (404) passes through the set pore channel, the finish-rolled deformed steel bar (404) is fixedly connected with the side plate culvert piece (3) by bolts; a branch mold, wherein the concrete mortar (8) is poured into the U-shaped notch (504);

thirdly, placing the waterproof rubber strips (7) at the joints of the side plate culvert pieces (3) and the bottom plate culvert pieces (2), and filling the concrete mortar (8) into the assembled sand filling notches;

step four, realizing the connection between the top plate culvert pieces (1) and the side plate culvert pieces (3) by referring to the step two and the step four, thereby forming a precast concrete box culvert section;

step five, inserting a prestressed steel bar into each segment through the prestressed duct (6), and longitudinally connecting the segments by tensioning;

and step six, covering by backfilling soil to finish construction.

Technical Field

The invention relates to the technical field of prefabricated culverts, in particular to a block splicing type prefabricated concrete box culvert and a construction process thereof.

Background

Culverts and channels, which are one of the important components in road engineering, have a considerable weight in road engineering both in terms of the number of projects and in terms of the construction costs, while box culverts are a common concrete structural form in culverts and channels. At present, cast-in-place technology is generally adopted for the construction of box culverts in China, but the construction of highway traffic engineering faces the upgrading transformation from labor-intensive industry to industrialized and standardized construction. Therefore, the prefabricated assembled concrete box culvert with the advantages of short construction period, high quality, good durability and the like is gradually popularized and applied in recent years.

In the application of the prefabricated culvert, the connection of the prefabricated culvert becomes a key problem, and the general prefabricated culvert connection method has the defects of low reliability, poor stress performance and no guarantee on waterproof performance. Meanwhile, the existing box culvert is generally integrally prefabricated or prefabricated in sections up and down, the prefabrication mode brings many problems in the hoisting and transporting processes, the construction cost of the prefabricated box culvert is greatly improved, and the prefabricated box culvert is difficult to popularize and use in a large quantity.

In view of the above problems, the designer actively makes research and innovation based on the practical experience and professional knowledge that the product engineering is applied for many years and by matching with the application of the theory, so as to design the block splicing type precast concrete box culvert and the construction process thereof, thereby improving the practicability.

Disclosure of Invention

The invention aims to provide a block splicing type precast concrete box culvert and a construction process thereof aiming at the defects in the prior art, so that the construction cost is reduced, the risk in the transportation process is reduced, and the construction efficiency is improved.

In order to achieve the purpose, the invention adopts the technical scheme that:

comprises roof culvert pieces, bottom plate culvert pieces, side plate culvert pieces, anchoring structures and fastening structures. The top plate culvert pieces are of cover body structures and are connected to the side plate culvert pieces in a covering mode; the side plate culvert piece is of an L-shaped structure and comprises a vertical end and a horizontal end; the vertical ends support the roof culvert pieces; the horizontal end is connected with the bottom plate culvert piece; the anchoring structures are arranged on the bottom plate culvert pieces and the side plate culvert pieces and are used for anchoring the connection between the bottom plate culvert pieces and the side plate culvert pieces; the fastening structures are arranged on the top plate culvert pieces and the side plate culvert pieces; the connecting device is used for fastening the connection of the roof culvert pieces and the side plate culvert pieces.

Further, the anchoring structure comprises an anchoring notch, an anchoring embedded steel plate, an anchoring steel plate and a finish-rolled deformed steel bar; the anchoring notches are of an L-shaped opening structure and are respectively arranged at the two ends of the bottom plate culvert piece and the top of the vertical end of the side plate culvert piece; the anchoring embedded steel plates are respectively inserted into the two ends of the bottom plate culvert piece and the top of the vertical end of the side plate culvert piece along the direction of the anchoring notch; the finish-rolled deformed steel bar and the anchoring embedded steel plate are arranged in a crossed manner; the anchoring steel plate is arranged at the tail part of the finish rolling deformed steel bar.

Further, the fastening structure comprises a fastening notch, a fastening embedded steel plate, a reserved hole channel and a U-shaped notch; the fastening notches are of an L-shaped opening structure and are respectively arranged on the inner wall of the roof culvert piece and the end part of the horizontal end of the side plate culvert piece; the fastening embedded steel plates are respectively inserted into the inner wall of the roof culvert piece and the end part of the horizontal end of the side plate culvert piece along the direction of the fastening notch; the reserved hole channel is matched with the finish-rolled deformed steel bar for realizing connection; the U-shaped groove opening is arranged at the tail part of the reserved hole channel.

Further, the device also comprises a prestressed duct; the prestressed duct is arranged at the right angle of the top plate culvert piece and the side plate culvert piece.

Furthermore, the joints between the top plate culvert pieces, the bottom plate culvert pieces and the side plate culvert pieces are provided with waterproof rubber strips.

Further, the fastening notch and the anchoring notch are assembled to form a sand filling notch, and the sand filling notch is used for filling concrete mortar.

Further, the construction process comprises the following steps:

step one, according to design requirements, a groove with a rectangular cross section is excavated in a construction site, and mechanical leveling is carried out on a groove foundation.

Secondly, vertically placing one bottom plate culvert piece on a flat foundation, aligning the finish-rolled deformed steel bar fixed on the bottom plate culvert piece and penetrating the reserved pore channels arranged on the two side plate culvert pieces; after the finish-rolled deformed steel bar passes through the set pore channel, fixedly connecting the finish-rolled deformed steel bar with the side plate culvert piece by adopting a bolt; and the branch side die is used for pouring the concrete mortar into the U-shaped notch.

And step three, placing the waterproof rubber strips at the joints of the side plate culvert pieces and the bottom plate culvert pieces, and filling the concrete mortar into the assembled sand filling notches.

And step four, realizing the connection between the top plate culvert pieces and the side plate culvert pieces by referring to the step two and the step four, thereby forming a precast concrete box culvert section.

And fifthly, inserting a prestressed steel bar into each segment through the prestressed duct, and longitudinally connecting the segments by tensioning.

And step six, covering by backfilling soil to finish construction.

Through the technical scheme of the invention, the following technical effects can be realized:

the box culvert is designed into a structure body formed by connecting the top plate culvert piece, the bottom plate culvert piece and the side plate culvert piece, and each part is provided with an anchoring structure and a fastening structure. The concrete box culvert is subjected to standardized construction like an assembly type building structure, the running water type prefabrication production is convenient to form, the prefabrication cost, the hoisting and transportation cost and the field assembly cost of components are reduced, the risk in the transportation process is reduced, and the field assembly efficiency is improved.

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 described in 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 front view of a novel plate type combined prefabricated concrete box culvert;

FIG. 2 is a schematic structural view of a roof culvert;

FIG. 3 is a schematic structural view of a side plate culvert;

FIG. 4 is a schematic structural view of a floor culvert;

FIG. 5 is a schematic view of the anchoring configuration being connected to the fastening configuration;

reference numerals: the top plate culvert piece 1, the bottom plate culvert piece 2, the side plate culvert piece 3, the prestress pore canal 6, the waterproof rubber strip 7, the concrete mortar 8, the anchoring notch 401, the anchoring embedded steel plate 402, the anchoring steel plate 403, the finish rolling threaded steel bar 404, the fastening notch 501, the fastening embedded steel plate 502, the reserved pore canal 503 and the U-shaped notch 504.

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.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A block splicing type precast concrete box culvert and a construction process thereof are shown in figures 1-5 and comprise top plate culvert pieces 1, bottom plate culvert pieces 2, side plate culvert pieces 3, anchoring structures and fastening structures. The top plate culvert pieces 1 are of cover body structures and are connected to the side plate culvert pieces 3 in a covering mode; the side plate culvert pieces 3 are of L-shaped structures and comprise vertical ends and horizontal ends; the vertical ends support the roof culvert pieces 1; the horizontal end is connected with the bottom plate culvert piece 2; the anchoring structures are arranged on the bottom plate culvert pieces 2 and the side plate culvert pieces 3 and are used for anchoring the connection between the bottom plate culvert pieces 2 and the side plate culvert pieces 3; the fastening structures are arranged on the roof culvert pieces 1 and the side plate culvert pieces 3; for fastening the connection of the roof culvert pieces 1 and the side plate culvert pieces 3.

Specifically, adopt and contain piece 1, bottom plate and contain the mode that piece 2 and 3 three connect combination of piece are contained to the curb plate with the roof for the construction is more convenient. The anchoring structure and the fastening structure are adopted to ensure the structural stability of the box culvert.

As a preferable example of the above embodiment, as shown in fig. 1 to 5, the anchoring structure includes an anchoring notch 401, an anchoring embedded steel plate 402, an anchoring steel plate 403, and a finish-rolled deformed steel bar 404; the anchoring notches 401 are of an L-shaped opening structure and are respectively arranged at the two ends of the bottom plate culvert piece 2 and the top of the vertical end of the side plate culvert piece 3; the anchoring embedded steel plates 402 are respectively inserted into the two ends of the bottom plate culvert piece 2 and the top of the vertical end of the side plate culvert piece 3 along the direction of the anchoring notch 401; the finish-rolled deformed steel bar 404 and the anchoring embedded steel plate 402 are arranged in a crossed manner; the anchoring steel plate 403 is arranged at the tail of the finish-rolled deformed steel bar 404.

As a preferable example of the above embodiment, as shown in fig. 1 to 5, the fastening structure includes a fastening notch 501, a fastening embedded steel plate 502, a reserved hole 503, and a U-shaped notch 504; the fastening notches 501 are of an L-shaped opening structure and are respectively arranged on the inner wall of the roof culvert piece 1 and the end part of the horizontal end of the side plate culvert piece 3; the fastening embedded steel plates 502 are respectively inserted into the inner wall of the roof culvert piece 1 and the end part of the horizontal end of the side plate culvert piece 3 along the direction of the fastening notch 501; the reserved hole 503 is matched with the finish-rolled deformed steel bar 404 for realizing connection; the U-shaped notch 504 is arranged at the tail of the reserved hole 503.

As a preferred embodiment, as shown in fig. 1 to 5, the device further includes a pre-stressed duct 6; the prestressed duct 6 is arranged at the right angle of the roof culvert piece 1 and the side plate culvert piece 3.

As a preferable example of the above embodiment, as shown in fig. 2, waterproof rubber strips 7 are disposed at the joints among the roof culvert pieces 1, the floor culvert pieces 2, and the side culvert pieces 3.

Specifically, through adopting the mode that the junction sets up waterproof rubber strip 7 between piece 2 and the piece 3 is contained to the bottom plate, improves the seal, and is more stable.

Preferably, as shown in fig. 1 to 5, the fastening notch 501 and the anchoring notch 401 are assembled to form a sand filling notch, and are used for filling concrete mortar 8.

As shown in fig. 1 to 5, the construction process of the above embodiment preferably includes the following steps:

step one, according to design requirements, a groove with a rectangular cross section is excavated in a construction site, and mechanical leveling is carried out on a groove foundation.

Secondly, vertically placing one bottom plate culvert piece 2 on a flat foundation, aligning the finish-rolled deformed steel bar 404 fixed on the bottom plate culvert piece 2 and penetrating the reserved pore 503 arranged on the two side plate culvert pieces 3; after the finish-rolled deformed steel bar 404 passes through the determined pore channel, the finish-rolled deformed steel bar 404 is fixedly connected with the side plate culvert pieces 3 by bolts; and a branch die, wherein the concrete mortar 8 is poured into the U-shaped groove opening 504.

And step three, placing the waterproof rubber strips 7 at the joints of the side plate culvert pieces 3 and the bottom plate culvert pieces 2, and filling the concrete mortar 8 in the assembled sand filling notches.

And step four, realizing the connection between the top plate culvert pieces 1 and the side plate culvert pieces 3 by referring to the step two and the step four, thereby forming a precast concrete box culvert section.

And step five, inserting a prestressed steel bar into each segment through the prestressed duct 6, and longitudinally connecting the segments by tensioning.

And step six, covering by backfilling soil to finish construction.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.