A honeycomb fixed-point green repair device and method for foundation pit support leakage

Abstract

The present invention discloses a honeycomb fixed-point green repair device for foundation pit support leakage, which belongs to the technical field of foundation pit repair, and comprises: a honeycomb-shaped box body spliced ​​by a plurality of honeycomb boxes, a groove is provided in the honeycomb box, a slurry outlet pipe is fixedly installed in the groove, a conduit extending out of the honeycomb box is slidably installed in the slurry outlet pipe, the conduits on the plurality of honeycomb boxes are connected by pipelines, a control valve is installed on the conduit, a distributed optical fiber temperature sensor is installed in the foundation pit support, the control valve is connected to the distributed optical fiber through a terminal control system, and the spatial position of the control valve corresponds to the distributed optical fiber temperature sensor one by one. The present invention can detect and identify leakage points through distributed optical fiber temperature sensors, and at the same time, perform grouting reinforcement treatment on the leakage point area locally, which effectively solves the problem that the current foundation pit support leakage cannot be accurately located and controlled.

Description

Technical Field

[0001] The present invention belongs to the technical field of foundation pit repair, and in particular relates to a honeycomb fixed-point green repair device and method for foundation pit support leakage. Background Art

[0002] With the development and utilization of underground space, the problems of foundation pit construction in rail-related areas have become increasingly prominent. During the construction process, local leakage of the ground-connected wall is prone to occur. The groundwater level outside the pit drops due to foundation pit construction, which increases the effective stress of the soil layer and causes vertical settlement and deformation of the subway tunnel. Therefore, it is necessary to seal the leakage points of the ground-connected wall.

[0003] At present, when leakage occurs in foundation pit engineering support, large-scale grouting is mainly used to plug the leakage, which reduces the impact of ground-connected wall leakage, but it is very expensive and affects the progress of the project. Therefore, there is no effective method for accurately locating the leakage part of foundation pit engineering support. How to accurately locate the local leakage point and effectively control it is a difficult problem that needs to be solved in foundation pit engineering.

[0004] Therefore, it is necessary to propose a honeycomb fixed-point green repair device and method for foundation pit support leakage to solve the above problems. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a honeycomb fixed-point green repair device and method for foundation pit support leakage, which is used to solve the problem of how to achieve accurate positioning and effective control of local leakage points in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a honeycomb fixed-point green repair device for foundation pit support leakage, comprising: a honeycomb-shaped box body spliced ​​together by a plurality of honeycomb boxes, a groove is provided in the honeycomb box, a slurry outlet pipe is fixedly installed in the groove, a conduit extending out of the honeycomb box is slidably installed in the slurry outlet pipe, the conduits on the plurality of honeycomb boxes are connected by pipelines, a control valve is installed on the conduit, a distributed optical fiber temperature sensor is installed in the foundation pit support, the control valve is connected to the distributed optical fiber through a terminal control system, and the spatial position of the control valve corresponds one-to-one to the distributed optical fiber temperature sensor.

[0008] Distributed fiber optic temperature sensors are installed during the pouring of foundation pit support construction. The spatial position is between 1 / 2 and 3 / 4 of the thickness of the foundation pit support. They are arranged back and forth along the extension direction of the foundation pit support. Distributed fiber optic temperature sensors form a monitoring network and are arranged on the foundation pit support to conduct full-range coverage monitoring. The terminal control system is installed with CSM software, which can output the monitored temperature and set the temperature early warning alarm value. Distributed fiber optic temperature sensors are used to monitor leakage of foundation pit engineering support. Distributed fiber optic temperature sensing is used for leakage monitoring. When leakage occurs in foundation pit engineering support, heat transfer will occur when the leaking water comes into contact with the soil and underground optical fiber. In the process of heat exchange, the temperature difference between the leakage site and the non-leakage site occurs. In particular, the greater the flow rate of the leakage water, the greater the temperature change of the leakage site. Using this leakage site and non-leakage site The temperature difference between the leakage parts is used to monitor leakage, that is, the temperature field is used to feedback the seepage field; in order to facilitate the monitoring of leakage points, the optical fiber is heated artificially. If there is a leakage point, the temperature of this part will be significantly lower than other parts, that is, the leakage part is determined; when the distributed optical fiber temperature sensor detects a large change in the temperature of a certain point in the foundation pit support, it means that there is a leaking water source, and the leakage point position is output instantly through the terminal control system. The distributed optical fiber temperature sensor outputs an instruction through the terminal control system to open the control valve on the conduit at its corresponding position. The grouting mechanism injects slurry into the conduit through the pipeline, so that the slurry flows into the slurry outlet pipe to fill the honeycomb box, so as to play a role in fixed-point repair. When the slurry fills the honeycomb box and the control valve senses that the slurry pressure exceeds a certain value, it automatically closes the valve and stops grouting, and the fixed-point repair of foundation pit support leakage is completed.

[0009] Furthermore, the repair device also includes a positioning plate installed on the foundation pit support, and the positioning plate is in a honeycomb shape corresponding to the box body. A jacking mechanism for outputting linear motion is installed at each inflection point of the positioning plate, and the output end of the jacking mechanism corresponds to the connection point of adjacent honeycomb boxes in the box body.

[0010] Furthermore, the repair device also includes a supporting panel, which is provided with an empty slot, in which a mounting frame is slidably installed, and the box body is installed on the mounting frame, and both side walls of the opposite side of the empty slot are provided with a first sliding slot arranged horizontally, and the mounting frame is rotatably installed with a roller away from the side wall of the box body, and the roller is slidably connected with the first sliding slot, and the roller can slide along the first sliding slot to make the box body fit with the foundation pit support, and both side walls of the opposite side of the empty slot are provided with a second sliding slot arranged vertically, and the first sliding slot is connected to the second sliding slot by a third sliding slot inclined downwardly, and the roller can slide into the third sliding slot along the first sliding slot and slide into the second sliding slot along the third sliding slot, so that the mounting frame can slide out of the empty slot along the second sliding slot.

[0011] Furthermore, the honeycomb box is made of aluminum material.

[0012] Furthermore, the outer wall of the box body and the inner wall of the honeycomb box are both covered with a film, and the film is coated with organic oil.

[0013] A repair method of a honeycomb fixed-point green repair device for foundation pit support leakage, comprising the following steps:

[0014] S1: installing and debugging the repair device, and performing heating treatment on the distributed optical fiber;

[0015] S2: Continuous temperature monitoring is performed through distributed optical fiber temperature sensors. If the temperature of a certain part is lower than that of other parts and the temperature change ΔT>4°C, it is determined to be a leakage site, and the grouting mechanism is started and the control valve on the corresponding conduit is opened through the terminal control system to allow the slurry to flow into the corresponding honeycomb box for plugging. When the slurry fills the honeycomb box and the control valve senses that the slurry pressure exceeds the preset value, the terminal control system automatically closes the valve and stops grouting to complete the foundation pit leakage repair;

[0016] S3: After the foundation pit leakage repair is completed, the jacking mechanism is started to separate the box from the solidified slurry, and then the box is moved out of the supporting panel through the lifting mechanism.

[0017] The beneficial effects of the present invention are:

[0018] The present invention can effectively detect and identify leakage points through distributed optical fiber temperature sensors, and at the same time perform grouting reinforcement treatment on the leakage point area. After the grouting filling reinforcement is completed, it can be intelligently controlled and closed, effectively solving the problem that the current foundation pit support leakage cannot be accurately located and controlled; it greatly ensures the safety of foundation pit engineering support, reduces the impact of foundation pit leakage on the surrounding geology, and improves the comprehensive construction level; compared with the traditional large-scale grouting plugging method, it improves the accuracy of plugging and greatly reduces the grouting cost.

[0019] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the jacking of an embodiment of the present invention;

[0023] Figure 3 It is a structural schematic diagram of a honeycomb box according to an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the position of the conduit before lifting according to an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the position of the catheter after jacking according to an embodiment of the present invention;

[0026] Figure 6 is a structural schematic diagram of a support panel according to an embodiment of the present invention;

[0027] Figure 7 is a front view of a support panel according to an embodiment of the present invention;

[0028] Figure 8 FIG. 4 is a spatial arrangement diagram of a distributed optical fiber temperature sensor according to an embodiment of the present invention.

[0029] The markings in the attached drawings are as follows: 1. Honeycomb box; 2. Box body; 101. Groove; 102. Slurry outlet pipe; 103. Conduit; 3. Positioning plate; 4. Lifting mechanism; 5. Support panel; 501. Empty slot; 502. Mounting frame; 503. First slide slot; 504. Second slide slot; 505. Third slide slot; 506. Roller; 507. Elastic member; 508. Extrusion plate; 6. Foundation pit support; 7. Distributed optical fiber temperature sensor. DETAILED DESCRIPTION

[0030] like Figures 1 to 8 As shown, the present invention provides a honeycomb fixed-point green repair device for foundation pit support leakage, comprising: a honeycomb-shaped box body 2 spliced ​​by multiple honeycomb boxes 1, a groove 101 is provided in the honeycomb box 1, a slurry outlet pipe 102 is fixedly installed in the groove 101, a conduit 103 extending out of the honeycomb box 1 is slidably installed in the slurry outlet pipe 102, the conduits 103 on the multiple honeycomb boxes 1 are connected by pipelines, a control valve is installed on the conduit 103, a distributed optical fiber temperature sensor is installed in the foundation pit support, the control valve is connected to the distributed optical fiber through a terminal control system, and the spatial position of the control valve corresponds one-to-one to the distributed optical fiber temperature sensor.

[0031] In this scheme, if Figure 8The distributed optical fiber temperature sensor is installed with the foundation pit support construction. The spatial position is between 1 / 2 and 3 / 4 of the thickness of the foundation pit support. It is arranged back and forth along the extension direction of the foundation pit support. The distributed optical fiber temperature sensor forms a monitoring network and is arranged on the foundation pit support to conduct full-range coverage monitoring. The terminal control system is installed with CSM software, which can output the monitored temperature and set the temperature warning alarm value. If the temperature at a certain point changes significantly, it means that there is a leakage source. The terminal control system will instantly output the leakage point location, such as Figure 1 and 3 The distributed optical fiber temperature sensor is used to monitor the leakage of foundation pit engineering support. When the distributed optical fiber temperature sensor detects leakage in the foundation pit support, the distributed optical fiber temperature sensor outputs a command through the terminal control system to open the control valve on the conduit 103 at its corresponding position, and the grouting mechanism injects slurry into the conduit 103 through the pipeline, so that the slurry flows into the slurry outlet pipe 102 to fill the honeycomb box 1, so as to play a role in fixed-point repair. When the slurry fills the honeycomb box 1, the control valve senses that the slurry pressure exceeds a certain value, and then automatically closes the valve to stop grouting, and the fixed-point repair of the foundation pit support leakage is completed; in actual engineering construction, for the sake of safety, the control valve at the adjacent position of the monitoring leakage position can be opened to allow the corresponding honeycomb box 1 to be injected with slurry at the same time to ensure that the leakage position is completely blocked.

[0032] Distributed optical fiber temperature sensors can be used to effectively detect and identify leakage points, and grouting reinforcement can be carried out locally in the leakage area. After the grouting filling reinforcement is completed, it can be intelligently controlled and closed, effectively solving the current problem of the inability to accurately locate and control the leakage of foundation pit support; it greatly ensures the safety of foundation pit engineering support, reduces the impact of foundation pit leakage on the surrounding geology, and improves the overall construction level; compared with the traditional large-scale grouting plugging method, it improves the accuracy of plugging and greatly reduces the grouting cost.

[0033] In one embodiment of the present invention, the repair device also includes a positioning plate 3 installed on the foundation pit support, and the positioning plate 3 is in a honeycomb shape corresponding to the box body 2. A jacking mechanism 4 for outputting linear motion is installed at each inflection point of the positioning plate 3, and the output end of the jacking mechanism 4 corresponds to the connection point of the adjacent honeycomb box 1 in the box body 2.

[0034] In this scheme, if Figure 2 The lifting mechanism 4 adopts a hydraulic cylinder to install the box body 2 corresponding to the positioning plate 3. After the grouting repair is completed, the box body 2 is lifted by the lifting mechanism 4 to separate the box body 2 from the slurry injected into the inner wall of the honeycomb box 1 and solidified. During the movement of the box body 2, it moves along the conduit 103, so that the conduit 103 slides along the inner wall of the slurry outlet pipe 102 to close the slurry outlet pipe 102.

[0035] This solution installs a lifting mechanism 4 at each turning point of the positioning plate 3, so as to facilitate the ejection of the box body 2 after the grouting repair is completed, reflecting the green construction concept that the repair device can be recycled and reused; and the box body 2 slides along the guide tube 103 to ensure the stability of the lifting of the box body 2.

[0036] In one embodiment of the present invention, the repair device also includes a supporting panel 5, which is provided with an empty slot 501, in which a mounting frame 502 is slidably installed, and the box body 2 is installed on the mounting frame 502, and both side walls opposite to the empty slot 501 are provided with a transversely arranged first sliding slot 503, and the mounting frame 502 is rotatably installed away from the side wall of the box body 2, and the roller 506 can slide along the first sliding slot 503 to make the box body 2 fit with the foundation pit support, and both side walls opposite to the empty slot 501 are provided with a vertically arranged second sliding slot 504, and the first sliding slot 503 and the second sliding slot 504 are connected by a downwardly inclined third sliding slot 505, and the roller 506 can slide into the third sliding slot 505 along the first sliding slot 503 and slide into the second sliding slot 504 along the third sliding slot 505, so that the mounting frame 502 can slide out of the empty slot 501 along the second sliding slot 504.

[0037] In this scheme, if Figure 6 After the support panel 5 is fixedly installed at the construction site, the box body 2 is installed in the mounting frame 502. The mounting frame 502 slides into the empty slot 501 along the second slide groove 504 through the roller 506. The mounting frame 502 is pushed to make the roller 506 slide into the first slide groove 503 along the third slide groove 505 until the box body 2 fits with the side wall of the foundation pit support. The mounting frame 502 is locked by the locking mechanism. When the grouting repair is completed, the locking mechanism is unlocked to allow the mounting frame 502 to slide, and the jacking mechanism 4 is started to lift the box body. 2 is lifted so that the roller 506 on the mounting frame 502 can slide along the first slide groove 503 toward the second slide groove 504. When the lifting mechanism 4 is lifted to the maximum displacement, the roller 506 is at the connection between the first slide groove 503 and the third slide groove 505. Under the gravity of the mounting frame 502 and the box body 2, the roller 506 slides along the downwardly inclined third slide groove 505 into the second slide groove 504. Then, the mounting frame 502 and the box body 2 are lifted out along the second slide groove 504 by the lifting mechanism for turnover and reuse.

[0038] This solution ensures the stability of the box body 2 when it is installed on the foundation pit support by providing a support panel 5, and avoids the leakage of slurry from the groove 101 during grouting due to a gap between the box body 2 and the side wall of the foundation pit support; by providing a third slide groove 505, when the jacking mechanism 4 is jacked to the maximum displacement, the box body 2 can slide along the third slide groove 505 for a distance to keep the box body 2 away from the output end of the jacking mechanism 4, and avoids friction caused by the contact between the box body 2 and the output end of the jacking mechanism 4 when the box body 2 is hoisted out of the empty slot 501, which may cause damage to the box body 2 or the jacking mechanism 4.

[0039] In one embodiment of the present invention, a pressing plate 508 is installed on the inner wall side of the mounting frame 502 away from the empty slot 501 through an elastic member 507 , and two opposite pressing plates 508 are used to clamp the box body 2 .

[0040] In this scheme, if Figure 7 By providing the elastic member 507 and the extrusion plate 508 , the two opposite extrusion plates 508 can clamp the box body 2 and adapt according to the size of the box body 2 , thereby ensuring the stability of the installation of the box body 2 .

[0041] In one embodiment of the present invention, the honeycomb box 1 is made of aluminum material.

[0042] In this solution, aluminum materials are easy to demould and can be recycled after being scrapped, reflecting the concept of green and environmentally friendly construction.

[0043] In one embodiment of the present invention, the outer wall of the box body 2 and the inner wall of the honeycomb box 1 are both covered with a film, and organic oil is coated on the film.

[0044] In this solution, by providing a film and engine oil, it is convenient to demould the box body 2 after the grouting repair is completed.

[0045] A repair method of a honeycomb fixed-point green repair device for foundation pit support leakage, comprising the following steps:

[0046] S1: installing and debugging the repair device, and performing heating treatment on the distributed optical fiber;

[0047] S2: Continuously monitor the temperature through distributed optical fiber temperature sensors. If the temperature of a certain part is lower than that of other parts and the temperature change ΔT>4°C, it is determined to be a leakage part, and the grouting mechanism is started and the control valve on the corresponding conduit 103 is opened through the terminal control system to allow the slurry to flow into the corresponding honeycomb box 1 for plugging. When the slurry fills the honeycomb box 1 and the control valve senses that the slurry pressure exceeds the preset value, the terminal control system automatically closes the valve and stops grouting to complete the foundation pit leakage repair;

[0048] S3: After the foundation pit leakage repair is completed, the jacking mechanism 4 is started to separate the box body 2 from the solidified slurry, and then the box body 2 is moved out of the foundation pit support through the lifting mechanism.

[0049] In this solution, distributed optical fiber temperature sensing is used for leakage monitoring. When leakage occurs in foundation pit engineering support, heat transfer will occur when the leaking water flows in contact with the soil and underground optical fiber. During the heat exchange process, the temperature difference between the leakage site and the non-leakage site will occur. In particular, the greater the flow rate of the leaking water flow, the greater the temperature change at the leakage site. Leakage monitoring is achieved by utilizing the temperature difference between the leakage site and the non-leakage site, that is, the temperature field is used to feedback the seepage field. In order to facilitate the monitoring of the leakage point, the optical fiber is artificially heated. If there is a leakage point, the temperature of this site will be significantly lower than that of other sites, that is, the leakage site is determined; by opening the control valve on the conduit 103, the grouting mechanism can inject the slurry into the corresponding honeycomb box 1, thereby sealing the leakage site.

[0050] As an optimization, the layout range of the honeycomb fixed-point green repair device for foundation pit support leakage is determined according to the degree of leakage risk of the foundation pit project. If the geology around the foundation pit project is poor, the groundwater level is unstable, and there is a risk of leakage, this device is selected for large-scale monitoring; if the geological conditions around the foundation pit project are stable, this device is selected for installation and layout at the leakage-prone locations of the foundation pit project.

[0051] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A honeycomb fixed-point green repair device for foundation pit support leakage, characterized in that: include: A honeycomb-shaped box body is spliced ​​together by multiple honeycomb boxes, the honeycomb box is provided with a groove, a slurry outlet pipe is fixedly installed in the groove, a conduit extending out of the honeycomb box is slidably installed in the slurry outlet pipe, the conduits on multiple honeycomb boxes are connected by pipelines, a control valve is installed on the conduit, a distributed optical fiber temperature sensor is installed in the foundation pit support, the control valve is connected to the distributed optical fiber through a terminal control system, and the spatial position of the control valve corresponds to the distributed optical fiber temperature sensor one by one; the repair device also includes a positioning plate installed on the foundation pit support, the positioning plate is in a honeycomb shape corresponding to the box body, and a lifting mechanism for outputting linear motion is installed at each inflection point of the positioning plate, and the output end of the lifting mechanism corresponds to the connection point of the adjacent honeycomb boxes in the box body.

2. The honeycomb fixed-point green repair device for foundation pit support leakage according to claim 1 is characterized by: The repair device also includes a supporting panel, which is provided with an empty slot, in which a mounting bracket is slidably installed, and the box body is installed on the mounting bracket, and both side walls of the opposite side of the empty slot are provided with a first sliding slot arranged horizontally, and the mounting bracket is rotatably installed with a roller away from the side wall of the box body, and the roller is slidably connected with the first sliding slot, and the roller can slide along the first sliding slot to make the box body fit with the foundation pit support. Both side walls of the opposite side of the empty slot are provided with a second sliding slot arranged vertically, and the first sliding slot is connected to the second sliding slot by a third sliding slot inclined downwardly, and the roller can slide into the third sliding slot along the first sliding slot and slide into the second sliding slot along the third sliding slot, so that the mounting bracket can slide out of the empty slot along the second sliding slot.

3. The honeycomb fixed-point green repair device for foundation pit support leakage according to claim 1 is characterized by: The honeycomb box is made of aluminum material.

4. The honeycomb fixed-point green repair device for foundation pit support leakage according to claim 1 is characterized by: The outer wall of the box body and the inner wall of the honeycomb box are both covered with a film, and the film is coated with organic oil.

5. The repair method of the honeycomb fixed-point green repair device for foundation pit support leakage according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1: installing and debugging the repair device, and performing heating treatment on the distributed optical fiber; S2: Continuous temperature monitoring is performed through distributed optical fiber temperature sensors. If the temperature of a certain part is lower than that of other parts and the temperature change ΔT>4°C, it is determined to be a leakage site, and the grouting mechanism is started and the control valve on the corresponding conduit is opened through the terminal control system to allow the slurry to flow into the corresponding honeycomb box for plugging. When the slurry fills the honeycomb box and the control valve senses that the slurry pressure exceeds the preset value, the terminal control system automatically closes the valve and stops grouting to complete the foundation pit leakage repair; S3: After the foundation pit leakage repair is completed, the jacking mechanism is started to separate the box from the solidified slurry, and then the box is moved out of the supporting panel through the lifting mechanism.

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