Pipe joint connecting and reinforcing structure for super-large-section rectangular pipe-jacking underground excavation station

Abstract

The utility model provides a super-large-section rectangular pipe-jacking underground excavation station pipe joint connecting and reinforcing structure which comprises a plurality of pipe joints and a longitudinal beam structure which stretches across the multiple pipe joints to be connected. The multiple pipe sections are connected end to end in a spliced mode, preformed holes used for installing the longitudinal beam structure are formed in the tops and the bottoms of the middle areas of the pipe sections respectively, and the preformed holes of the pipe sections directly face each other in the axial direction. The longitudinal beam structure comprises H-shaped steel, sleeve valve steel pipes, studs, post-pouring beam steel bars and self-compacting concrete. The H-shaped steel transversely penetrates through the reserved hole, the sleeve valve steel pipe is arranged at the top end of the H-shaped steel and arranged in the same direction as the H-shaped steel, the studs are evenly welded and fixed to the two sides of a web of the H-shaped steel, the post-pouring beam steel bars are erected around the H-shaped steel, and the self-compacting concrete is used for filling the remaining space of the reserved hole. The structure can be used for enhancing the reinforcing strength of effective connection of the pipe jacking underground excavation section.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe joint construction technical field, and specifically speaking, relate to a kind of super large section rectangular pipe jacking station pipe joint connection reinforcing structure. BACKGROUND

[0002] With the continuous development of society, ground rail traffic has been difficult to meet people's travel, underground rail traffic has been booming development, to relieve ground traffic pressure.

[0003] In the subway construction, due to the particularity of the geographical location of subway station, often affected by road and existing large pipe diameter pipeline, pipeline relocation and road diversion construction difficulty is great, so the road and the pipeline under the pipe jacking method is used to construction.

[0004] Under this working condition, the effective connection of the pipe jacking station of the pipe jacking section becomes a big technical problem, according to the prior art, the pipe jacking section of the station is connected and reinforced by relying on simple reinforced concrete structure, which is easy to cause the following risks:

[0005] ①: the reinforced concrete structure for connection has insufficient stiffness, and the pipe joints of the pipe jacking section are easy to deform and produce fault;

[0006] ②: the reinforced concrete structure for connection has insufficient stiffness, and the pipe joint position is easy to leak water.

[0007] Based on the above reasons, the existing connection method needs to be improved. UTILITY MODEL CONTENT

[0008] The utility model aims at the deficiency of prior art, and provides a kind of super large section rectangular pipe jacking station pipe joint connection reinforcing structure for enhancing the reinforcing strength of the effective connection of pipe jacking section.

[0009] In order to achieve the above purpose, the utility model adopts the technical scheme of: a kind of super large section rectangular pipe jacking station pipe joint connection reinforcing structure, comprising multiple pipe joints and longitudinal beam structure connected across multiple pipe joints;

[0010] Multiple pipe joints are connected in series, the top and bottom of the central region of the pipe joint are provided with reserved holes for installing the longitudinal beam structure, and the reserved holes of each pipe joint are axially opposite;

[0011] The longitudinal beam structure comprises H-shaped steel, sleeve valve steel pipe, bolt, post-poured beam reinforcement and self-compacting concrete;

[0012] The H-shaped steel is arranged across the reserved hole, the sleeve valve steel pipe is arranged at the top end of the H-shaped steel and arranged in the same direction as the H-shaped steel, the studs are uniformly welded and fixed on both sides of the web of the H-shaped steel, the post-cast beam steel bars are arranged around the H-shaped steel, and the self-compacting concrete is used for filling the remaining space of the reserved hole.

[0013] Preferably, the multi-section pipe section crosses the pipe open cut section and the pipe underground section of the subway station.

[0014] Preferably, the top and bottom of the central region of the pipe section are respectively provided with two reserved holes which are horizontal to each other; and the H-shaped steel is a longitudinal beam formed by connecting a plurality of HH-shaped steels.

[0015] Preferably, a plurality of studs are embedded on the inner side of the left and right wall surfaces of the reserved hole.

[0016] Preferably, a plurality of studs are embedded on the outer side of the left and right wall surfaces of the reserved hole.

[0017] Preferably, the post-cast beam steel bars comprise vertical connecting short steel bars connected between the two flanges of the H-shaped steel and longitudinal steel bars in the web region connecting the connecting short steel bars.

[0018] Preferably, the post-cast beam steel bars further comprise a row of longitudinal steel bars arranged above the H-shaped steel.

[0019] Preferably, the post-cast beam steel bars further comprise a row of longitudinal steel bars arranged below the H-shaped steel.

[0020] Preferably, the self-compacting concrete has a grade of C50.

[0021] Preferably, the H-shaped steel is connected by a connecting plate and a plurality of bolts to connect the webs of the adjacent two H-shaped steels into one body, and the connecting position of the two H-shaped steels is welded and fixed.

[0022] Compared with the prior art, the utility model discloses a reserved hole is left in the specific position of the prefabricated pipe piece of the pipe, an H-shaped steel is inserted into the hole, and corresponding studs, sleeve valve steel pipes, post-cast beam steel bars and other integrated structures are arranged, then the hole is filled with self-compacting concrete, thereby greatly improving the reinforcing effect of the connection position of the pipe section of the large-section rectangular pipe of the subway station. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole view of the large-section rectangular pipe of the subway station pipe section connection reinforcing structure.

[0024] Figure 2 It is a detail view of the large-section rectangular pipe of the subway station pipe section connection reinforcing structure.

[0025] Figure 3 This is one of the process diagrams for a super-large cross-section rectangular pipe jacking tunnel station section connection and reinforcement structure in this utility model.

[0026] Figure 4 This is the second process diagram of a super-large cross-section rectangular pipe jacking tunneling station pipe section connection and reinforcement structure in this utility model.

[0027] In the diagram: 1. Reserved hole; 2. Sleeve valve steel pipe; 3. H-beam; 4. Stud; 5. Post-cast beam reinforcement; 6. Self-compacting concrete; 7. Pipe section. Detailed Implementation

[0028] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0029] like Figures 1-4 As shown, a reinforced structure for connecting pipe sections in a large-section rectangular pipe jacking tunnel station includes multiple pipe sections 7 and a longitudinal beam structure that spans and connects the multiple pipe sections 7.

[0030] In this embodiment, the splicing structure of multiple pipe sections 7 spans the open-cut and cut-and-cover sections of the subway station, forming a large-span pipe section structure. In order to enhance the load-bearing capacity of the pipe section structure in the transverse direction, reserved holes 1 and longitudinal beam structures are specially added.

[0031] Specifically, in this embodiment, to ensure support strength, two horizontally spaced pre-drilled holes 1 are provided at the top and bottom of the central area of ​​the pipe section 7; the H-beam 3 is a longitudinal beam formed by connecting multiple H-beams end to end, the connecting ends of adjacent H-beams 3 are welded, and the webs of adjacent H-beams 3 are connected as one unit by connecting plates and bolts to reinforce the weak connection area.

[0032] Multiple pipe sections 7 are connected end to end. The top and bottom of the central area of ​​each pipe section 7 are respectively provided with reserved holes 1 for installing the longitudinal beam structure. The reserved holes 1 of each pipe section 7 are aligned axially to form a complete reserved hole for installing the longitudinal beam structure.

[0033] The longitudinal beam structure includes H-beams 3, sleeve valve steel pipes 2, studs 4, post-cast beam reinforcement 5, and self-compacting concrete 6.

[0034] The H-beam 3 is arranged transversely through the reserved hole 1. The sleeve valve steel pipe 2 is arranged at the top of the H-beam 3 and in the same direction as the H-beam 3. The studs 4 are evenly welded and fixed to both sides of the web of the H-beam 3. The post-cast beam reinforcement 5 is erected around the H-beam 3. The self-compacting concrete 6 is used to fill the remaining space of the reserved hole 1. The grade of the self-compacting concrete is C50.

[0035] In order to further improve the strength of the concrete structure, a plurality of uniformly distributed studs are embedded on the inner side of the left and right wall surfaces of the reserved hole, and a plurality of uniformly distributed studs are embedded on the outer side of the left and right wall surfaces of the reserved hole.

[0036] The post-cast beam reinforcement includes vertical connecting short reinforcement connected between the two flanges of the H-shaped steel and web area longitudinal reinforcement connecting each connecting short reinforcement; the post-cast beam reinforcement further includes a row of longitudinal reinforcement arranged above the H-shaped steel; and the post-cast beam reinforcement further includes a row of longitudinal reinforcement arranged below the H-shaped steel.

[0037] The main function of the inserted H-shaped steel is to increase the overall rigidity; the H-shaped steel is welded with studs at a set interval, mainly to increase the gripping force between the steel and the self-compacting concrete; the sleeve valve steel pipe is installed and welded on the top of the steel, which is used for supplementary grouting in the later period, and the H-shaped steel is installed by traction in sections.

[0038] The connecting plates and bolts are used to connect each section of the steel, and the steel is simultaneously bound with reinforcement during the installation process to prevent cracks in the post-cast self-compacting concrete and to play a role in crack resistance; C50 self-compacting concrete is poured in the range of the pipe jacking section, achieving the purpose of connecting and reinforcing the super-large cross-section rectangular pipe jacking station pipe section in the coastal area.

[0039] The specific construction process is briefly described as follows:

[0040] (1) A steel assembly jacking platform is erected in the pipe jacking starting well, and a steel traction platform is erected in the pipe jacking receiving well; the platform scaffold is arranged at a reasonable distance, the main keel is double-row square steel, the secondary keel is full-paved square wood, and the panel is bamboo plywood.

[0041] (2) A steel traction device is installed in the pipe jacking starting well; a traction rope is installed using a wire cable threading device, and then the steel wire rope of the traction steel is installed in place using the traction rope.

[0042] (3) The steel is hoisted to the installation platform to weld a steel pulley, which reduces the friction force during traction; the steel is spliced, and a grouting pipe is installed on the top of the steel.

[0043] (4) The steel wire rope is connected with the steel, and after advancing a certain distance, the next section of steel is installed, until the installation is completed, and the steel extends into the station one span of the open-cut section.

[0044] (5) The self-compacting concrete in the pipe jacking section is pressure injected.

[0045] The embodiment is simple and convenient in operation, does not use special materials, successfully solves the problem that the subway station is constructed by the open excavation method on both sides and the pipe jacking method in the middle, and the construction method of connecting the open excavation section and the pipe jacking section into one body under the working condition is remarkable in effect, shortens the construction period, increases the stability of the whole open excavation section and the subway jacking section, and ensures the permanent use safety of the subway station.

[0046] Finally, it should be noted that the above detailed description of the preferred embodiments of the present patent is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the present patent.

Claims

1. A super-section rectangular jacking pipe station pipe joint connection reinforcing structure, characterized in that: The application relates to a longitudinal beam structure comprising multi-section pipe sections and connecting longitudinal beams. The multi-section pipe sections are connected in series, the top and bottom of the central area of the pipe section are respectively provided with reserved holes for mounting the longitudinal beam structure, and the reserved holes of each pipe section are axially opposite; The longitudinal beam structure comprises H-shaped steel, sleeve valve steel pipe, pegs, post-poured beam steel bars and self-compacting concrete. The H-shaped steel is arranged across the reserved holes, the sleeve valve steel pipe is arranged at the top end of the H-shaped steel and is arranged in the same direction as the H-shaped steel, the pegs are uniformly welded and fixed on the two sides of the web plate of the H-shaped steel, the post-poured beam steel bars are arranged around the H-shaped steel, and the self-compacting concrete is used for filling the remaining space of the reserved holes.

2. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 1, characterized in that: The multi-section pipe sections cross the pipe open-cut section and the pipe underground section of a subway station.

3. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 2, characterized in that: The top and bottom of the central area of the pipe section are respectively provided with two horizontal reserved holes; and the H-shaped steel is a longitudinal beam formed by connecting HH-shaped steels in series.

4. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 3, characterized in that: A plurality of uniformly distributed pegs are embedded on the inner side of the left and right wall surfaces of the reserved holes.

5. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 4, characterized in that: A plurality of uniformly distributed pegs are embedded on the outer side of the left and right wall surfaces of the reserved holes.

6. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 5, characterized in that: The post-poured beam steel bars comprise vertical connecting short bars connected between the two flanges of the H-shaped steel and web area longitudinal bars connecting the connecting short bars.

7. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 6, characterized in that: The post-poured beam steel bars further comprise a row of longitudinal bars arranged above the H-shaped steel.

8. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 7, characterized in that: The post-poured beam steel bars further comprise a row of longitudinal bars arranged below the H-shaped steel.

9. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 8, characterized in that: The grade of the self-compacting concrete is C50.

10. The super-section rectangular jacking pipe station pipe joint connecting and reinforcing structure according to claim 9, characterized in that: The connecting plates and the plurality of bolts are used for connecting the web plates of the two adjacent H-shaped steels into one body, and the connecting portions of the two H-shaped steels are welded and fixed.

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