Hollow pipe joint structure suitable for bundle pipe roof method

Abstract

The application belongs to the technical field of pipe curtain construction, and discloses a hollow pipe joint structure suitable for beam pipe curtain method, which comprises a monitor arranged in a monitoring area and used for monitoring whether the cast concrete is dense, a supporting mechanism fixed in a cavity and used for supporting the hollow pipe, and a connecting pipe with a first end extending into and fixed to the hollow pipe and a second end penetrating through the cavity and extending to the monitoring area and used for discharging gas in the monitoring area to the hollow pipe or supplementing grout from the hollow pipe to the monitoring area. The connecting pipe arranged can be used for uniform exhaust in the cavity, avoids the formation of air mass, and guarantees the quality of the cast concrete. The concrete liquid level monitor can be used for monitoring the position of the cast concrete liquid level, and the endoscopic camera is used for observing the position of the liquid level. If the problem of non-dense casting is found, the connecting pipe can be used for supplementing grout into the cavity in time, so that the hollow pipe joint structure is dense and has uniform bearing capacity.

Description

Technical Field

[0001] This invention belongs to the field of pipe jacking construction technology, and specifically relates to a hollow pipe section structure suitable for the bundled pipe jacking method. Background Technology

[0002] With urban economic development and increasing scarcity of underground space, traditional excavation techniques can no longer meet the needs of modern cities. In this context, trenchless underground technologies have emerged, providing an efficient and environmentally friendly new option for urban underground infrastructure construction. Currently, commonly used trenchless technologies include shield tunneling, pipe jacking, mining methods, and pipe jacking. Among these, pipe jacking offers advantages such as ultra-shallow overburden, free cross-section, no need for support, combination of permanent and temporary facilities, and small footprint, making it suitable for trenchless projects with ultra-shallow overburden, large cross-sections, and limited construction sites. The bundled pipe jacking technology involves inserting prestressed tendons into corrugated pipes placed within the openings after the pipe jacking is completed. This "stringing" and "pulling" of the pipe jacks together upgrades the stress distribution from the original longitudinal force and lateral support to lateral prestressed tension, resulting in combined longitudinal and lateral forces. This eliminates the need for supports, creating a stronger bundled pipe jacking structure. This allows for unreinforced, unsupported tunneling, improving efficiency and reducing costs. Existing pipe jacking technologies typically use several steel pipe sections connected to form the structure. The pipe jacking composed of these steel sections requires the subsequent pouring of self-compacting concrete within each section. This bundled pipe jacking structure presents the following problems:

[0003] (1) Difficulty in compacting the casting: The internal structure of the bundled pipe curtain is complex and the fluidity of the self-leveling concrete is limited. Under long-distance casting conditions, the top of the pipe curtain is prone to closed air masses, which makes it difficult to compact.

[0004] (2) Difficulty in inspecting the quality of grouting: After the concrete is poured into the pipe curtain, it is difficult to inspect the quality of grouting and it is also difficult to replenish the grout.

[0005] (3) There are weak points in the load-bearing capacity: the concrete is difficult to compact, resulting in gaps at the top of the pipe section, and the weak point in the load-bearing capacity of the structure becomes the uncompacted pipe section.

[0006] Therefore, we propose a hollow tube section structure suitable for the bundled tube curtain method to solve the above problems. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a hollow pipe section structure suitable for the bundled pipe curtain method, which solves the problems of difficulty in compacting the casting, difficulty in inspecting the grouting quality, and the existence of weak points in load-bearing capacity.

[0008] This invention is achieved through the following scheme: a hollow tube section structure suitable for the bundled tube curtain method, comprising:

[0009] Pipe section;

[0010] A hollow tube is installed inside a pipe section and forms a cavity for concrete pouring between the tube section and the pipe section. A monitoring area is formed at the top of the cavity.

[0011] A monitor, installed in the monitoring area, is used to monitor whether the poured concrete is dense;

[0012] A support mechanism, fixed within the cavity, is used to support the hollow tube; and

[0013] A connecting pipe, the first end of which extends into and is fixed to the hollow tube, and the first end passes through the cavity and extends to the monitoring area, for discharging gas from the monitoring area into the hollow tube or replenishing slurry from the hollow tube into the monitoring area.

[0014] A further improvement of the present invention for hollow tube section structures applicable to the bundled tube curtain method is that the support mechanism includes several sets of stiffening ribs, which are spaced apart along the length of the cavity; each set of stiffening ribs consists of four ribs, and the four stiffening ribs are respectively diagonally supported at the four corners of the tube section.

[0015] A further improvement of the present invention for hollow tube section structures in the bundled tube curtain method is that the support mechanism further includes several load-bearing plates and several guide members. The load-bearing plates are respectively fixed between the two lowest stiffening ribs of each group of stiffening ribs; the guide members are respectively fixed to the top of the load-bearing plates to form a row of guide members for positioning and guiding the hollow tube.

[0016] A further improvement of the present invention for hollow tube section structures in the bundled tube curtain method is that the monitor includes a plurality of concrete liquid level monitors fixed on the top wall of the monitoring area, and the plurality of concrete liquid level monitors are spaced apart along the length of the monitoring area.

[0017] A further improvement of the present invention for the hollow tube section structure of the bundled tube curtain method is that the connecting tubes are provided in several groups, and the several groups of connecting tubes correspond to several concrete liquid level monitors respectively.

[0018] A further improvement of the present invention for the hollow tube section structure applicable to the bundled tube curtain method is that each group of the connecting tubes consists of three tubes, and the three connecting tubes are distributed equidistantly along a fan shape. The second ends of the two outermost connecting tubes of the three connecting tubes partially abut against the top wall of the monitoring area to prevent the hollow tube from floating during concrete pouring.

[0019] A further improvement of the present invention for hollow tube section structures applicable to the bundled tube curtain method is that the monitor further includes several endoscopic cameras, which are respectively installed inside several connecting tubes and extend to the monitoring area.

[0020] A further improvement of the present invention for the hollow tube section structure applicable to the bundled tube curtain method is that the outer surface of the connecting tube is provided with threads, and the upper end of the hollow tube has a threaded hole for the connecting tube to be screwed in.

[0021] A further improvement of the present invention for the hollow tube section structure applicable to the bundled tube curtain method is that templates for sealing the cavity are provided on both sides of the tube section, and an injection pipe connected to the monitoring area is provided at the upper end of the template for injecting concrete into the cavity.

[0022] A further improvement of the present invention to the hollow tube section structure applicable to the bundled tube curtain method is that the upper and lower parts of the tube section are each provided with a pair of holes for the corrugated tube to pass through.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] This invention, by incorporating a hollow tube in the middle of the pipe section, transforms the "full-section filled" pipe section into a "hollow" one, providing operational space for subsequent inspections and reducing concrete usage. By injecting concrete into the cavity through the inlet pipes at both ends, bidirectional pouring is achieved, doubling the pouring distance compared to unidirectional pouring. The connecting pipe allows for uniform venting within the cavity, preventing air pockets and ensuring the quality of the poured concrete. A concrete level monitor tracks the concrete level, and an endoscopic camera observes the level. If insufficient compaction is still detected, grout can be promptly added to the cavity through the connecting pipe, ensuring a dense and uniformly load-bearing hollow pipe section structure. Attached Figure Description

[0025] Figure 1 A schematic diagram of the installation location of the concrete liquid level monitor of the present invention is shown.

[0026] Figure 2 A schematic diagram of the hollow tube installation position in this invention is shown.

[0027] Figure 3 A schematic diagram showing the arrangement of the connecting pipes of the present invention is provided.

[0028] Figure 4 A schematic diagram of the present invention is shown, illustrating the exhaust gas through the monitoring zone.

[0029] Figure 5 A schematic diagram of the cavity of the present invention filled with concrete is shown.

[0030] In the diagram: 1. Pipe section; 2. Hollow pipe; 3. Concrete liquid level monitor; 4. Connecting pipe; 5. Stiffening rib; 6. Guide component; 7. Corrugated pipe; 8. Monitoring area; 9. Cavity; 10. Load-bearing plate. Detailed Implementation

[0031] To address the problems of difficulty in achieving dense compaction during casting, challenges in inspecting the quality of the grouting, and the existence of weak points in load-bearing capacity, this invention provides a hollow pipe section structure suitable for the bundled pipe jacking method. The following detailed description, in conjunction with accompanying drawings, provides a specific embodiment of this hollow pipe section structure suitable for the bundled pipe jacking method.

[0032] See Figures 1-5 As shown, a hollow tube section structure suitable for the bundled tube curtain method includes:

[0033] Pipe section 1;

[0034] Hollow tube 2 is installed inside pipe section 1 and forms a cavity 9 for concrete pouring between it and pipe section 1. A monitoring area 8 is formed on the top of cavity 9.

[0035] The monitor, located in monitoring area 8, is used to monitor whether the poured concrete is dense.

[0036] The support mechanism, fixed inside the cavity 9, is used to support the hollow tube 2; and

[0037] The connecting pipe 4 has its first end inserted into and fixed inside the hollow pipe 2, and its second end passes through the cavity 9 and extends to the monitoring area 8. It is used to discharge the gas in the monitoring area 8 into the hollow pipe or to replenish the slurry from the hollow pipe to the monitoring area 8.

[0038] Specifically, in this embodiment, the hollow tube 2 is made of steel, which gives the hollow tube 2 a certain strength and ensures that the stress performance of the hollow tube 2 meets the requirements; the hollow tube 2 is provided with a slide rail for the maintenance trolley to move. Workers use the maintenance trolley to move inside the hollow tube 2 to install the connecting pipe 4 and to perform operations such as grouting through the connecting pipe 4.

[0039] Among them, see Figures 1-3 As shown, the support mechanism includes several sets of stiffening ribs 5, which are spaced apart along the length of the cavity 9; each set of stiffening ribs 5 consists of four ribs, and the four stiffening ribs 5 are respectively diagonally supported at the four corners of the pipe section 1.

[0040] By diagonally bracing the four corners of pipe section 1 with stiffening ribs 5, the overall strength of pipe section 1 can be strengthened and improved, thereby increasing its load-bearing capacity.

[0041] Among them, see Figures 1-3 As shown, the support mechanism also includes several load-bearing plates 10 and several guide members 6. The load-bearing plates 10 are respectively fixed between the two lowest stiffening ribs 5 of each group of stiffening ribs 5; the guide members 6 are respectively fixed on the top of the load-bearing plates 10 to form a row of guide members 6 for positioning and guiding the hollow tube 2.

[0042] Specifically, in this embodiment, the guide 6 is preferably a guide wheel. By hoisting the hollow tube 2 into place, the hollow tube 2 is pushed to move into the cavity 9 by the guide wheel, which facilitates the installation of the hollow tube 2 and also provides stable support for the hollow tube 2.

[0043] Among them, see Figure 4 As shown, the monitor includes several concrete liquid level monitors 3 fixed on the top wall of the monitoring area 8, and the several concrete liquid level monitors 3 are spaced apart along the length of the monitoring area 8.

[0044] Specifically, in this embodiment, the concrete level monitor 3 can be a level sensor. By setting several level sensors at intervals in the monitoring area 8, the monitoring area 8 can be fully monitored, thereby accurately monitoring the position of the poured concrete level.

[0045] Among them, see Figure 3 As shown, there are several sets of connecting pipes 4, and each set of connecting pipes 4 corresponds to a number of concrete liquid level monitors 3.

[0046] The connection pipe 4 corresponds to the concrete liquid level monitor 3, which facilitates precise grouting operations through the connection pipe 4.

[0047] Among them, see Figure 3 As shown, each group of connecting pipes 4 consists of three pipes, which are distributed equidistantly along a fan shape. The second ends of the two outermost connecting pipes 4 partially abut against the top wall of the monitoring area 8 to prevent the hollow pipe from floating during concrete pouring. The non-contact portions of the two outermost connecting pipes 4 with the top wall of the monitoring area 8 are used for venting and grouting. A gap is left between the middle connecting pipe 4 and the top wall of the monitoring area 8 for venting and grouting.

[0048] By setting three connecting pipes 4 evenly distributed in the area monitored by the concrete liquid level monitor 3, it is beneficial to carry out uniform and precise grouting operations through the connecting pipes 4 in the future, so that the concrete poured will have a better compaction effect. At the same time, the corners of the two outermost connecting pipes 4 abut against the inner top wall of the pipe section 1, thus providing diagonal support between the hollow pipe 2 and the inner top wall of the monitoring area 8, which can ensure an anti-buoyancy effect when pouring concrete into the cavity 9.

[0049] The outer surface of the connecting pipe 4 is threaded, and the upper end of the hollow pipe 2 has a threaded hole for the connecting pipe 4 to be screwed in.

[0050] By connecting the connecting pipe 4 to the screw hole opened on the hollow pipe 2, the connecting pipe 4 can be fixed, which is convenient for installation and use, and the connection between the two is sealed.

[0051] The monitor also includes several endoscopic cameras, which are installed inside several connecting pipes 4 and extend to the monitoring area 8.

[0052] An endoscope camera installed inside the connecting pipe 4 can be used to monitor the concrete level in the monitoring area 8, thereby enabling precise grouting operations in conjunction with the concrete level monitor 3. The endoscope camera can be removed or left in place before grouting.

[0053] Both sides of the pipe section 1 are provided with templates for sealing the cavity 9. The upper end of the template is provided with an injection pipe connected to the monitoring area 8 for injecting concrete into the cavity 9.

[0054] By injecting concrete into the cavity 9 through the injection pipes at both ends, bidirectional pouring can be achieved, which doubles the pouring distance compared to unidirectional pouring, and is beneficial to the compactness of the concrete in the building.

[0055] Among them, the upper and lower parts of the pipe section 1 are each provided with a pair of holes for the corrugated pipe 7 to pass through, and the corrugated pipe 7 and the holes are sealed.

[0056] By pre-setting the corrugated pipe 7, it is convenient to tension the prestressed tendons later; at the same time, the corrugated pipe 7 can be wrapped by the poured concrete, and by sealing the corrugated pipe 7 with the hole, leakage can be prevented when pouring concrete.

[0057] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0058] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A hollow tube section structure suitable for the bundled tube curtain method, characterized in that, include: Pipe section; A hollow tube is installed inside a pipe section and forms a cavity for concrete pouring between the tube section and the pipe section. A monitoring area is formed at the top of the cavity. A monitor, installed in the monitoring area, is used to monitor whether the poured concrete is dense; A support mechanism, fixed within the cavity, is used to support the hollow tube; as well as A connecting pipe, the first end of which extends into and is fixed to the hollow tube, and the second end which passes through the cavity and extends to the monitoring area, is used to discharge gas from the monitoring area to the hollow tube or to replenish slurry from the hollow tube to the monitoring area; The monitor includes several concrete liquid level monitors fixed on the top wall of the monitoring area, and the several concrete liquid level monitors are spaced apart along the length of the monitoring area. The connecting pipe is provided in several sets, and each set of connecting pipes corresponds to a number of concrete liquid level monitors. Each group consists of three connecting pipes, which are equidistantly distributed in a fan shape. The second ends of the two outermost connecting pipes partially abut against the top wall of the monitoring area to prevent the hollow pipe from floating during concrete pouring. The outer surface of the connecting tube is provided with threads, and the upper end of the hollow tube has a threaded hole for the connecting tube to be screwed in.

2. The hollow tube section structure suitable for the bundled tube curtain method as described in claim 1, characterized in that, The support mechanism includes several sets of stiffening ribs, which are spaced apart along the length of the cavity; each set of stiffening ribs consists of four ribs, and the four stiffening ribs are respectively diagonally supported at the four corners of the pipe section.

3. The hollow tube section structure suitable for the bundled tube curtain method as described in claim 2, characterized in that, The support mechanism also includes several load-bearing plates and several guide members. The load-bearing plates are respectively fixed between the two lowest stiffening ribs of each group of stiffening ribs. The guide members are respectively fixed to the top of the load-bearing plates to form a row of guide members for positioning and guiding the hollow tube.

4. The hollow tube section structure suitable for the bundled tube curtain method as described in claim 1, characterized in that, The monitor also includes several endoscopic cameras, which are respectively installed inside several connecting tubes and extend to the monitoring area.

5. The hollow tube section structure suitable for the bundled tube curtain method as described in claim 1, characterized in that, Both sides of the pipe section are provided with templates for sealing the cavity, and the upper end of the template is provided with an injection pipe connected to the monitoring area for injecting concrete into the cavity.

6. The hollow tube section structure applicable to the bundled tube curtain method as described in claim 1, characterized in that, The pipe section has a pair of holes at the top and bottom for the corrugated pipe to pass through.

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