Method for constructing a cable-bundled pipe roof structure

Abstract

The application belongs to the technical field of pipe curtain construction, and discloses a construction method of a bundled pipe curtain structure, which comprises the following steps: step S1, a hollow pipe is arranged in the interior of a pipe joint; step S2, a connecting pipe is provided, the first end of the connecting pipe is inserted into and fixed in the hollow pipe, the second end of the connecting pipe passes through the cavity and extends to the monitoring area, and the connecting pipe is used for discharging the gas in the monitoring area to the hollow pipe or supplementing the grout from the hollow pipe to the monitoring area; step S3, a monitor is arranged in the monitoring area; and step S6, the cavity is filled with concrete. The connecting pipe arranged in the cavity can be used for uniform exhaust of the cavity, the formation of air masses is avoided, and the quality of the poured concrete is ensured. The concrete liquid level monitor can be used for monitoring the position of the poured concrete liquid level, the endoscopic camera is used for observing the position of the liquid level, if the problem of non-dense pouring is still found, the grout can be supplemented into the cavity in time through the connecting pipe, so that the hollow pipe joint structure is densely poured and the bearing capacity is uniform.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of pipe curtain construction, and particularly relates to a construction method of a bundled pipe curtain structure. BACKGROUND

[0002] With the development of urban economy and the increasing tension of underground space, the traditional excavation technology has been unable to meet the needs of modern cities. In this case, underground trenchless technology has emerged as the times require, providing a new choice of high efficiency and environmental protection for urban underground infrastructure construction. At present, the commonly used trenchless technology mainly includes shield method, pipe jacking method, mine method and pipe curtain method. Among them, the pipe curtain method has the advantages of ultra-shallow covering, free section, no need for support, permanent and temporary combination and small occupation, and is suitable for non-excavation engineering with ultra-shallow covering, large section and small construction site. The bundled pipe curtain technology is to pass the prestressed beam into the corrugated pipe arranged in the hole after the pipe curtain is jacked, to "string" and "pull" the pipe curtain, and to upgrade the stress form from the original longitudinal stress and lateral support to the lateral prestressed tension and longitudinal and lateral common stress, so as to cancel the support and form a strong bundled pipe curtain overall structure, realize non-reinforcement and non-supporting excavation, improve work efficiency and reduce cost. The pipe curtain in the prior art usually adopts a plurality of steel pipe joints to connect to form a pipe curtain structure, and the pipe curtain formed by the steel pipe joints needs to pour self-compacting concrete in the subsequent steel pipe joint. The pipe curtain joint structure has the following problems:

[0003] (1) difficult to compact: the internal structure of the bundled pipe curtain joint is complex, and the flowability of the self-leveling concrete is limited. In the long-distance pouring working condition, there is a closed air mass at the top of the pipe curtain, which makes it difficult to compact;

[0004] (2) difficult to check the pouring quality: after pouring the concrete in the pipe curtain, it is difficult to check the pouring quality and to supplement the grouting;

[0005] (3) weak bearing capacity point: the concrete pouring is difficult to compact, resulting in voids at the top of the pipe joint, and the weak bearing capacity position of the structure is changed to the pipe joint which is not compacted;

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

[0007] In order to solve the above problems, the present application provides a construction method of a bundled pipe curtain structure, which solves the problems of difficult to compact, difficult to check the pouring quality and weak bearing capacity point.

[0008] The present application is realized by the following scheme: a construction method of a bundled pipe curtain structure, comprising the following steps:

[0009] Step S1, a hollow pipe is arranged in the pipe section, a cavity is formed between the hollow pipe and the pipe section, and a monitoring area is formed at the top of the cavity;

[0010] Step S2, a connecting pipe is provided, the first end of the connecting pipe is inserted into the hollow pipe and fixed, the second end of the connecting pipe passes through the cavity and extends to the monitoring area, and the connecting pipe is used for discharging gas in the monitoring area to the hollow pipe or supplementing slurry from the hollow pipe to the monitoring area;

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

[0012] Step S4, a pair of holes are arranged at the upper part and the lower part of the pipe section respectively, and a corrugated pipe is arranged in each pair of holes and fixed;

[0013] Step S5, a plurality of pipe sections are arranged side by side and assembled to form a pipe roof, and full welding connection and fixation are performed on adjacent hollow pipes in the pipe roof;

[0014] Step S6, templates are fixed on both sides of the pipe roof to seal the cavity, an injection pipe is arranged at the upper end of the template, and concrete is injected into the cavity through the injection pipe;

[0015] Step S7, after the concrete injection is completed, the concrete liquid level position is observed through the monitor, and if an area with poor compaction is found, slurry is supplemented to the area with poor compaction through the connecting pipe.

[0016] The further improvement of the construction method of the bundled pipe roof structure is that before the hollow pipe is arranged in the pipe section, the method further comprises the step of fixing a supporting mechanism for supporting the hollow pipe in the pipe section.

[0017] The further improvement of the construction method of the bundled pipe roof structure is that the step of fixing the supporting mechanism for supporting the hollow pipe in the pipe section comprises:

[0018] A plurality of groups of stiffening ribs are provided, the number of stiffening ribs in each group is four, the plurality of groups of stiffening ribs are arranged at intervals along the length direction of the cavity, and then the four stiffening ribs in each group are respectively inclined and supported at the four corners of the pipe section;

[0019] A plurality of bearing plates are provided, and the plurality of bearing plates are respectively fixed between the two lowermost stiffening ribs in each group of stiffening ribs;

[0020] A plurality of guide pieces are provided, and the plurality of guide pieces are respectively fixed at the top of the plurality of bearing plates to form a row of guide pieces for positioning and guiding the hollow pipe.

[0021] The further improvement of the construction method of the bundled pipe roof structure is that when the monitor is arranged in the monitoring area, a plurality of groups of monitors are provided and are arranged at intervals along the length direction of the monitoring area; when the connecting pipe is provided, a plurality of groups of connecting pipes are provided and are respectively corresponding to the plurality of groups of monitors.

[0022] The further improvement of the construction method of the bundled pipe roof structure is that the number of the connecting pipes in each group is three.

[0023] The step of making the first end of the connecting pipe extend into and be fixed into the hollow pipe and the second end extend through the cavity and extend to the monitoring area comprises:

[0024] The first end of the three connecting pipes in each group extends into and is fixed into the hollow pipe, the second end extends through the cavity and extends to the monitoring area, and the second end of the two outermost connecting pipes among the three connecting pipes partially abuts against the top wall in the monitoring area to prevent the hollow pipe from floating up when the concrete is poured, and the three connecting pipes are arranged in a fan shape as a whole.

[0025] The further improvement of the construction method of the bundled pipe roof structure is that the each group of monitors comprises a concrete liquid level monitor and three endoscopic cameras.

[0026] When the step S3 is performed:

[0027] The concrete liquid level monitor is fixed on the top wall in the monitoring area.

[0028] The three endoscopic cameras are respectively arranged in the interiors of the three connecting pipes and extend to the monitoring area.

[0029] Compared with the prior art, the beneficial effects of the present application are as follows:

[0030] The present application adjusts the "full-section filling type" pipe joint to a "hollow type" pipe joint by arranging a hollow pipe in the middle of the pipe joint, which provides an operation space for subsequent inspection and reduces the amount of concrete; by pouring concrete into the cavity from the injection pipes at both ends, bidirectional pouring can be realized, which doubles the pourable distance compared with unidirectional pouring; the connecting pipes arranged can be used for uniform exhaust in the cavity, avoiding the formation of air masses and ensuring the quality of the poured concrete; the concrete liquid level monitor can be used to monitor the position of the poured concrete liquid level, and the endoscopic cameras can be used to observe the position of the liquid level; if the problem of non-dense pouring is still found, the connecting pipes can be used to timely supplement the mortar in the cavity, so that the hollow type pipe joint structure is densely poured and uniformly bears. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The present application shows the installation position of the concrete liquid level monitor.

[0032] Figure 2 The hollow pipe installation position schematic diagram of the present application is shown.

[0033] Figure 3 The connecting pipe arrangement position schematic diagram of the present application is shown.

[0034] Figure 4 The present application is shown Figure 2 The pipe curtain sectional view of the A-A angle of the present application.

[0035] Figure 5 The present application is shown by monitoring area exhaust schematic diagram.

[0036] Figure 6 The present application is shown by pouring concrete in the cavity.

[0037] In the figure: 1, pipe joint; 2, hollow pipe; 3, concrete liquid level monitor; 4, connecting pipe; 5, stiffening rib; 6, guide; 7, corrugated pipe; 8, formwork; 9, injection pipe; 10, monitoring area; 11, cavity; 12, 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 application provides a construction method of bundled pipe curtain structure. The construction method of bundled pipe curtain structure will be further described below in combination with the drawings.

[0039] Referring to Figures 1-6 The construction method of bundled pipe curtain structure, comprising the following steps:

[0040] Step S1, a hollow pipe 2 is arranged in the pipe joint 1, so that the cavity 11 is formed between the hollow pipe 2 and the pipe joint 1, and the top of the cavity 11 forms a monitoring area 10;

[0041] Step S2, a connecting pipe 4 is provided, and the first end of the connecting pipe 4 is inserted into and fixed to the hollow pipe 2, and the second end extends through the cavity 11 and extends to the monitoring area 10, for discharging gas from the monitoring area 10 to the hollow pipe 2 or supplementing grouting from the hollow pipe 2 to the monitoring area 10;

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

[0043] Step S4, a pair of holes are arranged at the upper and lower parts of the pipe joint 1, respectively, and a corrugated pipe 7 is arranged in each pair of holes and fixed; and the sealing treatment between the corrugated pipe 7 and the hole is carried out;

[0044] Step S5, arranging several pipe sections 1 side by side and assembling to form a pipe curtain 13; then full-welding connection and fixing of adjacent hollow pipes 2 in the pipe curtain 13;

[0045] Step S6, fixing a formwork 8 on both sides of the pipe curtain 13 for closing the cavity 11; providing a pouring pipe 9 at the upper end of the formwork 8; then pouring concrete into the cavity 11 through the pouring pipe 9;

[0046] Step S7, after the concrete pouring is completed, observing the concrete liquid level position through a monitor, if an area of poor compaction is found, supplementing grouting to the area through the connecting pipe 4.

[0047] Specifically, in the embodiment, the hollow pipe 2 is made of steel material, so that the hollow pipe 2 has a certain strength and can ensure that the stress performance of the hollow pipe 2 meets the requirements; the hollow pipe 2 is provided with a sliding rail for moving a maintenance trolley, workers move in the hollow pipe 2 by using the maintenance trolley, install the connecting pipe 4, and perform supplementing grouting and other operations through the connecting pipe 4; the full-welded hollow pipes 2 in the pipe curtain 13 form a whole, and there is no gap between the joints of adjacent hollow pipes 2, so that the concrete does not flow into the hollow pipe 2 from the joints when pouring the concrete into the cavity 11.

[0048] As shown in Figure 1 Before the hollow pipe 2 is arranged in the pipe section 1, the step of fixing a support mechanism for supporting the hollow pipe 2 in the pipe section 1 is further included.

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

[0050] As shown in Figure 1 The step of fixing the support mechanism for supporting the hollow pipe 2 in the pipe section 1 includes:

[0051] A plurality of sets of stiffening ribs 5 are provided, each set of stiffening ribs 5 has four stiffening ribs 5, the plurality of sets of stiffening ribs 5 are arranged at intervals along the length direction of the cavity 11, and then the four stiffening ribs 5 of each set are respectively inclinedly supported at the four corners of the pipe section 1;

[0052] A plurality of bearing plates 12 are provided, and the plurality of bearing plates 12 are respectively fixed between the two lowermost stiffening ribs 5 of each set of stiffening ribs 5;

[0053] A plurality of guide pieces 6 are provided, and the plurality of guide pieces 6 are respectively fixed at the top of the plurality of bearing plates 12 to form a row of guide pieces 6 for positioning and guiding the hollow pipe 2.

[0054] The reinforcing ribs 5 are arranged at the four corners of the pipe joint 1, which can be used for reinforcing and improving the overall strength of the pipe joint 1 and improving the bearing capacity; the guide 6 can be a guide wheel, and the hollow pipe 2 is hoisted into position, and then the hollow pipe 2 is pushed to move into the monitoring area 10 by relying on the guide wheel, which facilitates the installation of the hollow pipe 2 and also provides stable support for the hollow pipe 2.

[0055] As shown in Figure 5 When the monitor is arranged in the monitoring area 10, a plurality of groups of monitors are provided, and the plurality of groups of monitors are arranged at intervals along the length direction of the monitoring area 10; when the connecting pipe 4 is provided, a plurality of groups of connecting pipes 4 are provided, and the plurality of groups of connecting pipes 4 are respectively corresponding to the plurality of groups of monitors.

[0056] By arranging a plurality of groups of monitors, the monitoring area 10 can be fully monitored, so that the position of the poured concrete liquid surface can be accurately monitored, and each group of connecting pipes 4 can be fully vented and accurately grouted.

[0057] As shown in Figure 3 The number of each group of connecting pipes 4 is three;

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

[0059] The first end of each of the three connecting pipes 4 of each group is extended into and fixed in the hollow pipe 2, and the second end is extended through the cavity 11 and into the monitoring area 10, and the second end of the outermost two of the three connecting pipes 4 is partially in contact with the top wall in the monitoring area 10 to prevent the hollow pipe 2 from floating during pouring of the concrete, and the three connecting pipes 4 are arranged in a fan shape; the non-contact part of the outermost two connecting pipes 4 with the top wall in the monitoring area 10 is used for venting and grouting, and a gap is left between the middle one connecting pipe 4 and the top wall in the monitoring area 10 for venting and grouting.

[0060] By arranging three connecting pipes 4 evenly distributed in the area monitored by the monitor, it is beneficial to subsequent uniform and accurate grouting operation through the connecting pipe 4, so that the poured concrete is more compact; at the same time, the outermost two connecting pipes 4 are in contact with the inner top wall of the pipe joint 1, thereby being inclined between the hollow pipe 2 and the top wall in the monitoring area 10, which can ensure that the concrete is poured into the cavity 11, and the anti-floating effect is achieved.

[0061] Each group of monitors includes a concrete liquid level monitor 3 and three endoscopic cameras;

[0062] When step S3 is performed:

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

[0064] Three endoscopic cameras are respectively arranged in the interiors of the three connecting pipes 4 and extend to the monitoring area 10.

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

[0066] It should be noted that the relational terms herein such as first and second and the like are used only to differentiate one entity or action from another, and do not necessarily require or imply that any such actual relationship or order exists between or among the entities or actions. Also, the terms "comprising", "containing", or any other variant thereof are intended to cover a non-exclusive inclusion, so that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0067] The above embodiments of the present application are described in detail with reference to the accompanying drawings, and those skilled in the art can make various changes to the present application according to the above description. Thus, some details in the embodiments should not constitute a limitation on the present application, and the scope of the present application will be defined by the appended claims.

Claims

1. A construction method for a bundled tube curtain structure, characterized in that, Includes the following steps: Step S1: A hollow tube is installed inside the pipe section to form a cavity between the hollow tube and the pipe section, and a monitoring area is formed at the top of the cavity; Step S2: Provide a connecting pipe, and make the first end of the connecting pipe extend into and fix it into the hollow tube, and the second end pass through the cavity and extend to the monitoring area, for discharging the gas in the monitoring area into the hollow tube or replenishing the monitoring area from the hollow tube; Step S3: Install a monitor within the monitoring area; Step S4: Set a pair of holes at the top and bottom of the pipe section, and then insert a corrugated pipe into each of the two pairs of holes and fix it. Step S5: Arrange and assemble several pipe sections side by side to form a pipe curtain; then connect and fix adjacent hollow pipes within the pipe curtain. Step S6: Fix templates on both sides of the tube curtain to seal the cavity; install an injection pipe at the upper end of the template; and then pour concrete into the cavity through the injection pipe. Step S7: After the concrete pouring is completed, observe the position of the concrete liquid level through the monitor. If an area that is not compacted is found, fill the area with grout through the connecting pipe. Before installing the hollow tube inside the pipe section, the procedure also includes the step of fixing a support mechanism for supporting the hollow tube inside the pipe section. The step of fixing the support mechanism inside the tube section to support the hollow tube includes: Several sets of stiffening ribs are provided, with four stiffening ribs in each set. The sets of stiffening ribs are spaced apart along the length of the cavity, and then the four stiffening ribs in each set are diagonally braced at the four corners of the pipe section. Provide several load-bearing plates and fix them between the two lowest stiffening ribs of each group of stiffening ribs; A number of guide members are provided and fixed to the top of a number of load-bearing plates to form a row of guide members for positioning and guiding the hollow tube. When installing monitors within the monitoring area, several sets of monitors are provided and spaced apart along the length of the monitoring area; when providing connecting pipes, several sets of connecting pipes are provided and each set of connecting pipes corresponds to a set of monitors. Each group contains three connecting pipes; The step of inserting and fixing the first end of the connecting tube into the hollow tube, and having the second end pass through the cavity and extend into the monitoring area includes: The first end of each of the three connecting pipes in each group is inserted into and fixed inside the hollow tube, and the second end of each pipe passes through the cavity and extends into the monitoring area. The second ends of the two outermost connecting pipes of the three connecting pipes are partially in contact with the top wall of the monitoring area to prevent the hollow tube from floating when the concrete is poured. The three connecting pipes are arranged in a fan shape.

2. The construction method of the bundled tube curtain structure as described in claim 1, characterized in that, Each set of monitors includes a concrete liquid level monitor and three endoscopic cameras; When executing step S3: The concrete liquid level monitor is fixed to the top wall of the monitoring area; Three endoscopic cameras are respectively inserted inside three connecting tubes and extended into the monitoring area.

Images