Construction method of bundled pipe curtain structure

Abstract

The invention belongs to the technical field of pipe roofing construction, and discloses a construction method of a bundled pipe roofing structure, which comprises the following steps: S1, arranging a hollow pipe in a pipe joint; s2, a connecting pipe is provided, the first end of the connecting pipe extends into and is fixed into the hollow pipe, the second end of the connecting pipe penetrates through the cavity and extends to the monitoring area, and the connecting pipe is used for discharging gas in the monitoring area into the hollow pipe or supplementing slurry to the monitoring area from the hollow pipe; step S3, arranging a monitor in the monitoring area; and S6, concrete is poured into the cavity. The connecting pipe can be used for uniformly exhausting air in the cavity, so that the formation of air mass is avoided, and the quality of poured concrete is ensured; the concrete liquid level monitor can be used for monitoring the liquid level position of poured concrete, then the liquid level position is observed through the endoscopic camera, and if the problem that pouring is not compact is still found, grout can be supplemented into the cavity in time through the connecting pipe, so that the hollow pipe joint structure is compact in pouring and uniform in bearing capacity.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe curtain construction, and in particular relates to a construction method of a bundled pipe curtain structure. Background Art

[0002] With the development of urban economy and the increasing shortage of underground space, traditional excavation technology can no longer meet the needs of modern cities. Under such circumstances, underground trenchless technology has emerged, providing a new, efficient and environmentally friendly option for urban underground infrastructure construction. At present, the commonly used trenchless technologies mainly include shield method, pipe jacking method, mining method and pipe curtain method. Among them, the pipe curtain method has the advantages of ultra-shallow cover, free section, no support, permanent and temporary combination and small footprint, and is suitable for trenchless projects with ultra-shallow cover, large section and narrow construction site. The bundled pipe curtain technology is that after the pipe curtain is pushed in, the prestressed bundle is inserted into the corrugated pipe set in the hole, and the pipe curtain is "stringed" and "pulled". The force form is upgraded from the original longitudinal force and transverse support to transverse prestressed tensioning, and the longitudinal and transverse forces are jointly subjected to the force, and the support is cancelled, thereby forming a stronger bundled pipe curtain overall structure, realizing unreinforced and unsupported dark excavation, improving work efficiency and reducing costs. The pipe curtain in the prior art usually adopts a plurality of steel pipe sections to form a pipe curtain structure. The pipe curtain composed of steel pipe sections needs to be poured with self-compacting concrete in the subsequent steel pipe sections. The pipe curtain of the bundled pipe curtain has the following problems:

[0003] (1) Difficulty in compacting during pouring: The internal structure of the bundled pipe curtain is complex, and the fluidity of the self-leveling concrete is limited. Under long-distance pouring conditions, it is easy for a closed air mass to exist on the top of the pipe curtain, making it difficult to compact.

[0004] (2) Difficulty in checking pouring quality: After pouring concrete into the pipe curtain, it is difficult to check the pouring quality and to add grout;

[0005] (3) There are weak points in bearing capacity: Concrete pouring is difficult to compact, resulting in gaps at the top of the pipe section, and the weak position of the structural bearing capacity is transformed into an uncompacted pipe section;

[0006] Therefore, we propose a construction method of a bundled tube curtain structure to solve the above problems. Summary of the invention

[0007] In order to solve the above problems, the present invention provides a construction method of a bundled pipe curtain structure, which solves the problems of difficulty in compacting the pouring, difficulty in checking the pouring quality and weak points in bearing capacity.

[0008] The present invention is implemented by the following scheme: A construction method of a bundled pipe curtain structure comprises the following steps:

[0009] Step S1, arranging a hollow tube inside the pipe section so that a cavity is formed between the hollow tube and the pipe section, and a monitoring area is formed on the top of the cavity;

[0010] Step S2, providing a connecting tube, and extending a first end of the connecting tube into and fixed in the hollow tube, and a second end of the connecting tube passing through the cavity and extending to the monitoring area, so as to discharge the gas in the monitoring area into the hollow tube or to fill slurry from the hollow tube to the monitoring area;

[0011] Step S3, setting a monitor in the monitoring area;

[0012] Step S4, a pair of holes are provided at the upper part and the lower part of the pipe section, and a corrugated tube is passed through each of the two pairs of holes and fixed;

[0013] Step S5, arranging and assembling a plurality of pipe sections side by side to form a pipe curtain; and then fully welding and connecting adjacent hollow pipes in the pipe curtain;

[0014] Step S6, fixing templates on both sides of the tube curtain to close the cavity; setting an injection pipe at the upper end of the template; and pouring concrete into the cavity through the injection pipe;

[0015] Step S7: After the concrete pouring is completed, the concrete liquid level is observed through the monitor. If a loose concrete pouring area is found, grouting is added to the loose concrete pouring area through the connecting pipe.

[0016] A further improvement of the construction method of the bundled pipe curtain structure of the present invention is that before the hollow pipe is arranged inside the pipe segment, it also includes the step of: fixing a support mechanism for supporting the hollow pipe inside the pipe segment.

[0017] A further improvement of the construction method of the bundled pipe curtain structure of the present invention is that the step of fixing the supporting mechanism for supporting the hollow pipe inside the pipe segment comprises:

[0018] Providing a plurality of groups of stiffening ribs, each group of which has four stiffening ribs, arranging the plurality of groups of stiffening ribs at intervals along the longitudinal direction of the cavity, and then obliquely supporting the four stiffening ribs of each group at the four corners of the pipe segment;

[0019] Providing a plurality of load-bearing plates, and fixing the plurality of load-bearing plates respectively between the two lowest stiffening ribs of each group of stiffening ribs;

[0020] A plurality of guide members are provided and fixed to the tops of a plurality of load-bearing plates respectively to form a row of guide members for positioning and guiding the hollow tube.

[0021] A further improvement of the construction method of the bundled pipe curtain structure of the present invention is that when monitors are set in the monitoring area, several groups of monitors are provided, and the several groups of monitors are arranged at intervals along the length of the monitoring area; when connecting pipes are provided, several groups of connecting pipes are provided, and the several groups of connecting pipes correspond to the several groups of monitors respectively.

[0022] A further improvement of the construction method of the bundled tube curtain structure of the present invention is that the number of the connecting tubes in each group is three;

[0023] The step of extending the first end of the connecting tube into and fixing it in the hollow tube and allowing the second end to pass through the cavity and extend to the monitoring area comprises:

[0024] The first ends of the three connecting tubes in each group are inserted into and fixed in the hollow tube, and the second ends pass through the cavity and extend into the monitoring area. The second ends of the two outermost connecting tubes of the three connecting tubes are partially in contact with the top wall in the monitoring area to prevent the hollow tube from floating up when pouring concrete. The three connecting tubes are arranged in a fan shape as a whole.

[0025] A further improvement of the construction method of the bundled tube curtain structure of the present invention is that each set of monitors includes a concrete liquid level monitor and three endoscope cameras;

[0026] When executing step S3:

[0027] Fixing a concrete liquid level monitor on the top wall of the monitoring area;

[0028] The three endoscopic cameras are respectively inserted into the three connecting tubes and extended to the monitoring area.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention arranges a hollow tube in the middle of the pipe segment. The pipe segment structure adjusts the "full-section filled" pipe segment to a "hollow" pipe segment, which can provide an operating space for subsequent inspections and reduce the amount of concrete used. By pouring concrete into the cavity from injection pipes at both ends, two-way pouring can be achieved, and the pouring distance is doubled compared to unidirectional pouring. The arranged connecting pipe can be used for uniform exhaust in the cavity, avoiding the formation of air masses and ensuring the quality of poured concrete. The concrete liquid level monitor can be used to monitor the liquid level position of the poured concrete, and the liquid level position can be observed by the endoscopic camera. If the pouring is still found to be loose, the cavity can be filled with grout in time through the connecting pipe, so that the hollow pipe segment structure is poured densely and the bearing capacity is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the installation position of the concrete liquid level monitor of the present invention is shown.

[0032] Figure 2 A schematic diagram of the installation position of the hollow tube of the present invention is shown.

[0033] Figure 3 A schematic diagram showing the arrangement positions of the connecting pipes of the present invention is shown.

[0034] Figure 4 The present invention is shown Figure 2 Cross-sectional view of the tube curtain cut at the AA angle.

[0035] Figure 5 A schematic diagram of exhaust through a monitoring area according to the present invention is shown.

[0036] Figure 6 A schematic diagram showing the interior of the cavity of the present invention being filled with concrete is shown.

[0037] In the figure: 1. pipe section; 2. hollow pipe; 3. concrete liquid level monitor; 4. connecting pipe; 5. stiffening rib; 6. guide piece; 7. bellows; 8. formwork; 9. injection pipe; 10. monitoring area; 11. cavity; 12. load-bearing plate; 13. pipe curtain. DETAILED DESCRIPTION

[0038] In order to solve the problems of difficult compaction, difficult pouring quality inspection and weak bearing capacity, the present invention provides a construction method of a bundled pipe-roof structure. The following is a further description of the construction method of a bundled pipe-roof structure with specific embodiments and accompanying drawings.

[0039] See also Figure 1 to Figure 6 As shown, a construction method of a bundled tube curtain structure comprises the following steps:

[0040] Step S1, a hollow tube 2 is arranged inside the pipe section 1, so that a cavity 11 is formed between the hollow tube 2 and the pipe section 1, and a monitoring area 10 is formed on the top of the cavity 11;

[0041] Step S2, providing a connecting tube 4, and extending a first end of the connecting tube 4 into and fixed to the hollow tube 2, and a second end of the connecting tube 4 passing through the cavity 11 and extending to the monitoring area 10, for discharging gas in the monitoring area 10 into the hollow tube 2 or filling slurry from the hollow tube 2 to the monitoring area 10;

[0042] Step S3, setting a monitor in the monitoring area 10;

[0043] Step S4, a pair of holes are provided at the upper and lower parts of the pipe section 1, and a bellows 7 is passed through each of the two pairs of holes and fixed; and a sealing treatment is performed between the bellows 7 and the holes;

[0044] Step S5, arranging and assembling a plurality of pipe segments 1 side by side to form a pipe curtain 13; and then fully welding and connecting the adjacent hollow pipes 2 in the pipe curtain 13;

[0045] Step S6, fixing the template 8 on both sides of the tube curtain 13 to close the cavity 11; setting the injection pipe 9 at the upper end of the template 8; and then pouring concrete into the cavity 11 through the injection pipe 9;

[0046] Step S7, after the concrete pouring is completed, the concrete liquid level is observed through a monitor, and if a loose concrete area is found, grouting is added to the loose concrete area through the connecting pipe 4.

[0047] Specifically, in the present embodiment, the hollow tube 2 is made of steel material, so that the hollow tube 2 has a certain strength, which can ensure that the force performance of the hollow tube 2 meets the requirements; a slide rail for the movement of a maintenance trolley is arranged in the hollow tube 2, and workers use the maintenance trolley to move in the hollow tube 2 to install the connecting tube 4, and perform grouting and other operations through the connecting tube 4; the hollow tube 2 after full welding in the pipe curtain 13 forms a whole, and there is no gap at the joint between adjacent hollow tubes 2, so as to avoid the concrete from flowing into the hollow tube 2 from the joint when pouring concrete into the cavity 11.

[0048] Among them, see Figure 1 As shown, before the hollow tube 2 is arranged inside the pipe segment 1 , the step of fixing a supporting mechanism for supporting the hollow tube 2 inside the pipe segment 1 is also included.

[0049] By installing a supporting mechanism in the pipe section 1 to support the hollow pipe 2 , the hollow pipe 2 can be made more stable in actual application.

[0050] Among them, see Figure 1 As shown, the steps of fixing the supporting mechanism for supporting the hollow tube 2 inside the tube segment 1 include:

[0051] Provide a plurality of groups of stiffening ribs 5, each group of stiffening ribs 5 has four stiffening ribs, and arrange the plurality of groups of stiffening ribs 5 at intervals along the length direction of the cavity 11, and then support the four stiffening ribs 5 of each group obliquely at the four corners of the pipe segment 1 respectively;

[0052] Providing a plurality of load-bearing plates 12, and fixing the plurality of load-bearing plates 12 respectively between the two lowest stiffening ribs 5 of each group of stiffening ribs 5;

[0053] A plurality of guide members 6 are provided and fixed to the tops of a plurality of load-bearing plates 12 respectively to form a row of guide members 6 for positioning and guiding the hollow tubes 2 .

[0054] By diagonally bracing the four corners of the pipe section 1 with stiffening ribs 5, the overall strength of the pipe section 1 can be reinforced and improved, thereby increasing the bearing capacity; the guide member 6 can be a guide wheel, by hoisting the hollow tube 2 into place and then pushing the hollow tube 2 to move into the monitoring area 10 by means of the guide wheel, the installation of the hollow tube 2 is facilitated, and stable support can also be provided for the hollow tube 2 at the same time.

[0055] Among them, see Figure 5 As shown, when monitors are set in the monitoring area 10, several groups of monitors are provided, and the several groups of monitors are spaced apart along the length direction of the monitoring area 10; when connecting tubes 4 are provided, several groups of connecting tubes 4 are provided, and the several groups of connecting tubes 4 correspond to the several groups of monitors respectively.

[0056] By setting up several groups of monitors, the monitoring area 10 can be fully monitored, so that the position of the poured concrete liquid level can be accurately monitored, so as to cooperate with each corresponding group of connecting pipes 4 to perform sufficient exhaust and accurate grouting.

[0057] Among them, see Figure 3 As shown, the number of each group of connecting pipes 4 is three;

[0058] The steps of extending the first end of the connecting tube 4 into and fixing it in the hollow tube 2 and the second end passing through the cavity 11 and extending to the monitoring area 10 include:

[0059] The first ends of the three connecting tubes 4 of each group are inserted into and fixed to the hollow tube 2, and the second ends pass through the cavity 11 and extend into the monitoring area 10, and the second ends of the two outermost connecting tubes 4 of the three connecting tubes 4 are partially in contact with the inner top wall of the monitoring area 10 to prevent the hollow tube 2 from floating up when pouring concrete. The three connecting tubes 4 are arranged in a fan shape as a whole; the non-contact parts of the two outermost connecting tubes 4 and the inner top wall of the monitoring area 10 are used for exhaust and grouting, and a gap is left between the middle connecting tube 4 and the inner top wall of the monitoring area 10 for exhaust and grouting.

[0060] By arranging three connecting pipes 4 evenly distributed in the area monitored by the monitor, it is beneficial to perform uniform and accurate grouting operations through the connecting pipes 4 laterally, so that the poured concrete has a better compaction effect; at the same time, the two outermost connecting pipes 4 are abutted against the inner top wall of the pipe section 1 by the edges and corners, thereby being obliquely supported between the hollow pipe 2 and the inner top wall of the monitoring area 10, thereby ensuring an anti-floating effect when pouring concrete into the cavity 11.

[0061] Each set of monitors includes a concrete level monitor 3 and three endoscope cameras;

[0062] When executing step S3:

[0063] The concrete level monitor 3 is fixed on the top wall of the monitoring area 10;

[0064] The three endoscope cameras are respectively inserted into the three connecting tubes 4 and extend to the monitoring area 10 .

[0065] Specifically, the concrete level monitor 3 can be a liquid level sensor; the endoscopic camera set in the connecting pipe 4 can be used to monitor the concrete level in the monitoring area 10, so as to cooperate with the concrete level monitor 3 to perform precise grouting operations. Before grouting, the endoscopic camera can be taken out or not.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A construction method for a bundled tube curtain structure, characterized in that: The following steps are involved: Step S1, arranging a hollow tube inside the pipe section so that a cavity is formed between the hollow tube and the pipe section, and a monitoring area is formed on the top of the cavity; Step S2, providing a connecting tube, and extending a first end of the connecting tube into and fixed in the hollow tube, and a second end of the connecting tube passing through the cavity and extending to the monitoring area, so as to discharge the gas in the monitoring area into the hollow tube or to fill slurry from the hollow tube to the monitoring area; Step S3, setting a monitor in the monitoring area; Step S4, a pair of holes are provided at the upper part and the lower part of the pipe section, and a corrugated tube is passed through each of the two pairs of holes and fixed; Step S5, arranging and assembling a plurality of pipe sections side by side to form a pipe curtain; and then connecting and fixing adjacent hollow pipes in the pipe curtain; Step S6, fixing templates on both sides of the tube curtain to close the cavity; setting an injection pipe at the upper end of the template; and pouring concrete into the cavity through the injection pipe; Step S7: After the concrete pouring is completed, the concrete liquid level is observed through the monitor. If a loose concrete pouring area is found, grouting is added to the loose concrete pouring area through the connecting pipe.

2. The construction method of the bundled tube curtain structure according to claim 1, characterized in that: Before the hollow tube is arranged inside the pipe segment, the method further includes the step of fixing a supporting mechanism for supporting the hollow tube inside the pipe segment.

3. The construction method of the bundled pipe curtain structure according to claim 2, characterized in that: The step of fixing the supporting mechanism for supporting the hollow tube inside the pipe section comprises: Providing a plurality of groups of stiffening ribs, each group of which has four stiffening ribs, arranging the plurality of groups of stiffening ribs at intervals along the longitudinal direction of the cavity, and then obliquely supporting the four stiffening ribs of each group at the four corners of the pipe segment; Providing a plurality of load-bearing plates, and fixing the plurality of load-bearing plates respectively between the two lowest stiffening ribs of each group of stiffening ribs; A plurality of guide members are provided and fixed to the tops of a plurality of load-bearing plates respectively to form a row of guide members for positioning and guiding the hollow tube.

4. The construction method of the bundled tube curtain structure according to claim 3, characterized in that When monitors are arranged in the monitoring area, several groups of monitors are provided and arranged at intervals along the length of the monitoring area; when connecting pipes are provided, several groups of connecting pipes are provided and correspond to the several groups of monitors respectively.

5. The construction method of the bundled tube curtain structure according to claim 4, characterized in that: The number of connecting pipes in each group is three; The step of extending the first end of the connecting tube into and fixing it in the hollow tube and allowing the second end to pass through the cavity and extend to the monitoring area comprises: The first ends of the three connecting tubes in each group are inserted into and fixed in the hollow tube, and the second ends pass through the cavity and extend into the monitoring area. The second ends of the two outermost connecting tubes of the three connecting tubes are partially in contact with the top wall in the monitoring area to prevent the hollow tube from floating up when pouring concrete. The three connecting tubes are arranged in a fan shape as a whole.

6. The construction method of the bundled tube curtain structure according to claim 5, characterized in that: Each set of monitors includes a concrete level monitor and three endoscopic cameras; When executing step S3: Fixing a concrete liquid level monitor on the top wall of the monitoring area; The three endoscopic cameras are respectively inserted into the three connecting tubes and extended to the monitoring area.

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