Anti-seepage and anti-floating detection device and detection method for raft in high-water-level area

Abstract

The invention discloses an anti-seepage and anti-floating detection device and method for a raft in a high-water-level region, the device comprises a detection device arranged in the raft, the detection device comprises a sleeve, and the sleeve is internally provided with a moisture content determination assembly, a drainage assembly and a displacement detection assembly; the sleeve comprises an upper cylinder and a lower cylinder, the upper cylinder is wrapped in the waterproof layer and the raft, the upper end of the upper cylinder extends upwards to the outer side of the raft, the lower cylinder extends downwards into a foundation soil layer and is mounted on the outer side wall of the anti-floating pile, the lower cylinder comprises a grid plate and a filter sleeve covering the inner side of the grid plate, and the filter sleeve is arranged on the outer side wall of the anti-floating pile. And the upper part of the grid plate is tightly wrapped on the outer side wall of the lower part of the upper cylinder body. The method comprises the following steps of: 1, uniformly distributing and installing the detection devices; and 2, collecting and judging detection data. The detection devices are installed on the side walls of all the anti-floating piles, the pile position changes of all the anti-floating piles and the surrounding water amount changes can be conveniently judged in time, and therefore anti-seepage and anti-floating measures can be effectively taken for high-water-level areas in time.

Description

Technical Field

[0001] The invention belongs to the technical field of raft slab waterproof detection construction, and particularly relates to a raft slab anti-seepage and anti-floating detection device and a detection method in high water level areas. Background Art

[0002] In the field of on-site construction, all structures with raft foundations and basements are designed with anti-floating design in mind. During actual construction, the anti-floating and anti-seepage design of the raft slab is a crucial element. For residential complexes, especially those with large basements, numerous drainage wells, and abundant groundwater, prolonged exposure to water levels exceeding the design level can easily lead to irreversible damage such as deformation, cracking, and water seepage. This can seriously impact the structural safety of the structure, impacting the overall service life of the building.

[0003] Traditional raft construction often uses anti-floating anchors or anti-floating piles, increases in the base plate reinforcement ratio, increases in the base plate concrete thickness, and additional waterproofing membrane layers. However, these structures only provide anti-floating protection and are unable to monitor the raft's anti-floating and anti-seepage performance. Therefore, a device for monitoring the anti-seepage and anti-floating performance of rafts in high-water areas is urgently needed to provide timely and effective information on the raft's condition. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a raft anti-seepage and anti-floating detection device for high water level areas in view of the above-mentioned deficiencies in the prior art, which is convenient for popularization and use.

[0005] To solve the above technical problems, the present invention adopts a technical solution: a raft anti-seepage and anti-floating detection device for high-water-level areas, wherein anti-floating piles are provided at the lower portion of the raft, and a cushion layer and a waterproof layer are also provided at the lower portion of the raft located around the anti-floating piles. The device is characterized in that a detection device is provided inside the raft, the detection device comprising a sleeve, and a moisture content measurement component, a drainage component, and a displacement detection component are provided inside the sleeve; The casing includes an upper cylinder and a lower cylinder located at the lower part of the upper cylinder. A partition plate is provided at the bottom of the upper cylinder. The upper cylinder is wrapped in the waterproof layer and the raft. The upper end of the upper cylinder extends upward to the outside of the raft. The lower cylinder extends downward into the foundation soil layer and is installed on the outer side wall of the anti-floating pile. The lower cylinder includes a grid plate and a filter sleeve covering the inner side of the grid plate. The upper part of the grid plate is tightly wrapped on the outer side wall of the lower part of the upper cylinder.

[0006] Furthermore, a waterstop steel plate is horizontally arranged on the outer side wall of the upper cylinder, and the waterstop steel plate is located inside the raft plate.

[0007] Furthermore, the moisture content measuring component includes a moisture content measuring instrument and a moisture content detection probe. The upper end of the moisture content detection probe extends out of the sleeve and is connected to the moisture content measuring instrument. The lower end of the moisture content detection probe passes through the sleeve and extends into the foundation soil layer. The depth of the moisture content detection probe extending into the foundation soil layer is at least 20 cm.

[0008] Furthermore, the grid plate is a double-layer staggered dense grid structure, a conical mouth is provided at the lower part of the grid plate, a through hole for the moisture content detection probe to extend is opened at the center of the conical mouth, and a cross-hole rubber pad is provided in the through hole.

[0009] Furthermore, the displacement detection assembly includes a first displacement sensor installed on the inner wall of the lower cylinder and a second displacement sensor installed on the inner wall of the upper cylinder, and the second displacement sensor is located in the raft.

[0010] Furthermore, the drainage assembly includes a drainage pipe passing through the upper cylinder and extending into the lower cylinder. The upper end of the drainage pipe extends out of the upper cylinder and is connected to the water collecting box through a water pump. The lower end of the drainage pipe is lower than the first displacement sensor.

[0011] At the same time, the present invention also discloses a method for detecting anti-seepage and anti-floating of raft structures in high-water-level areas. The method has simple steps and is easy to operate. By installing a detection device on the side wall of each anti-floating pile, it is convenient to timely judge the changes in the position of each anti-floating pile and the changes in the surrounding water volume, so as to timely and effectively implement anti-seepage and anti-floating measures for high-water-level areas. The method is characterized in that it comprises the following steps: Step 1: Evenly distribute the detection devices: embed multiple detection devices in the raft slab. The detection devices correspond to the anti-floating piles one by one and are closely arranged on the side walls of the anti-floating piles. The specific installation method of the detection devices is as follows: First, fix the lower cylinder on the side wall of the anti-floating pile, then insert the lower end of the upper cylinder into the upper end of the grid plate, and tie the water-stop steel plate on the outside of the upper cylinder to the steel bars in the raft plate. Then, construct the waterproof layer, cushion layer and raft plate in sequence, and use the concrete of the raft plate to fix the upper cylinder. Step 2: Collect and judge test data: Step 201, displacement change judgment: set the initial displacement X0 in the displacement detection component, and collect the displacement data X0 collected by the displacement detection component within time T through the PLC controller. i By comparing the initial displacement X0 and the displacement data X i , obtain the displacement change data of the upper and lower cylinders, and then obtain the displacement change of each anti-floating pile and raft; Among them, X0, X i and T are both natural numbers not less than zero; Step 202, groundwater change determination: When there is no groundwater in the lower cylinder, the soil moisture content in the foundation soil layer is detected by the moisture content measurement component, the soil moisture content around each anti-floating pile is obtained, and a time-moisture content change line graph is drawn; When groundwater accumulates in the lower cylinder, the groundwater seeping into the lower cylinder is extracted and discharged through the drainage component, and the groundwater discharged by the drainage component is collected by the water collecting box. In the same period of time, the amount of water accumulated around each anti-floating pile is judged according to the amount of water collected by each water collecting box, and then the number of pile positions that have exceeded the standard groundwater volume is determined.

[0012] Compared with the prior art, the present invention has the following advantages: 1. The present invention provides a moisture content measuring component, which is convenient for extending into the foundation soil layer below the raft to continuously detect the soil moisture content, so as to timely judge whether the raft has the risk of sinking or floating according to the soil moisture content, which is convenient for promotion and use.

[0013] 2. The present invention provides a drainage component to facilitate the extraction and discharge of water seeping into the lower cylinder, which not only facilitates the subsequent detection of changes in groundwater composition and the erosion damage of the foundation soil layer to the raft plate, but also can assist in determining the moisture content of the foundation soil layer based on the drainage volume and drainage interval time. It is reliable, stable and has good use effect.

[0014] 3. The present invention provides a displacement detection component to facilitate the detection of displacement changes of the upper cylinder and the lower cylinder respectively, thereby obtaining whether there is a displacement change between the raft and the anti-floating piles, which is convenient for technical personnel to handle in a timely manner.

[0015] 4. The method of the present invention has simple steps and is easy to operate. By installing a detection device on the side wall of each anti-floating pile, it is convenient to timely judge the changes in the position of each anti-floating pile and the changes in the surrounding water volume, so as to timely and effectively implement anti-seepage and anti-floating measures in high water level areas, which is convenient for promotion and use.

[0016] To sum up, the anti-seepage and anti-floating detection device adopted in the present invention plays the role of drainage and detection at the same time; the anti-seepage and anti-floating detection method adopted has simple steps and convenient operation. By installing the detection device on the side wall of each anti-floating pile, it is convenient to timely judge the changes in the position of each anti-floating pile and the changes in the surrounding water volume, so as to timely and effectively implement anti-seepage and anti-floating measures in high water level areas, which is convenient for promotion and use.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2Schematic diagram of the internal structure of the sleeve of the present invention.

[0020] Figure 3 It is a flowchart of the method of the present invention.

[0021] Description of the accompanying drawings: 1-raft; 2-anti-floating pile; 3-cushion; 4-waterproof layer; 5-casing; 6-waterstop steel plate; 7-partition plate; 8-upper cylinder; 9-lower cylinder; 10-grid plate; 11-filter sleeve; 12-conical nozzle; 13-water content detection probe; 14-drain pipe; 15-first displacement sensor; 16-second displacement sensor; 17-filling area. DETAILED DESCRIPTION

[0022] like Figures 1 to 2 As shown, a raft anti-seepage and anti-floating detection device for high water level areas of the present invention is provided with anti-floating piles 2 at the lower part of the raft 1, and a cushion layer 3 and a waterproof layer 4 located around the anti-floating piles 2 are also provided at the lower part of the raft 1. A detection device is provided inside the raft 1, and the detection device includes a sleeve 5, and a moisture content measuring component, a drainage component and a displacement detection component are provided inside the sleeve 5.

[0023] The casing 5 includes an upper cylinder 8 and a lower cylinder 9 located at the lower part of the upper cylinder 8. A partition plate 7 is provided at the bottom of the upper cylinder 8. The upper cylinder 8 is wrapped in the waterproof layer 4 and the raft 1. The upper end of the upper cylinder 8 extends upward to the outside of the raft 1. The lower cylinder 9 extends downward into the foundation soil layer and is installed on the outer wall of the anti-floating pile 2. The lower cylinder 9 includes a grid plate 10 and a filter sleeve 11 covering the inner side of the grid plate 10. The upper part of the grid plate 10 is tightly wrapped on the outer wall of the lower part of the upper cylinder 8.

[0024] In this embodiment, a water-stopping steel plate 6 is horizontally arranged on the outer side wall of the upper cylinder 8 , and the water-stopping steel plate 6 is located inside the raft 1 .

[0025] During actual construction, the water-stop steel plate 6 is provided to enhance the connection stability between the upper cylinder 8 and the raft 1 .

[0026] In this embodiment, the moisture content measuring component includes a moisture content measuring instrument and a moisture content detection probe 13. The upper end of the moisture content detection probe 13 extends out of the sleeve 5 and is connected to the moisture content measuring instrument. The lower end of the moisture content detection probe 13 passes through the sleeve 5 and extends into the foundation soil layer. The depth of the moisture content detection probe 13 extending into the foundation soil layer is at least 20 cm.

[0027] In actual use, by setting up a moisture content measuring component, it is convenient to extend into the foundation soil layer below the raft 1 to continuously detect the soil moisture content, so that it is possible to timely judge whether the raft has the risk of sinking or floating based on the soil moisture content.

[0028] It should be noted that the moisture content meter can be a tubular soil profiler.

[0029] In this embodiment, the grid plate 10 is a double-layer staggered dense grid structure. A conical mouth 12 is provided at the lower part of the grid plate 10. A through hole for the moisture content detection probe 13 to extend is opened at the center of the conical mouth 12, and a cross-hole rubber pad is provided in the through hole.

[0030] In this embodiment, the displacement detection assembly includes a first displacement sensor 15 installed on the inner wall of the lower cylinder 9 and a second displacement sensor 16 installed on the inner wall of the upper cylinder 8 . The second displacement sensor 16 is located inside the raft 1 .

[0031] In actual use, the first displacement sensor 15 and the second displacement sensor 16 are both connected to the PLC controller, and the data of the first displacement sensor 15 and the second displacement sensor 16 are respectively collected by the PLC controller and transmitted to the computer. By setting up a displacement detection component, it is convenient to detect the displacement changes of the upper cylinder 8 and the lower cylinder 9 respectively, so as to obtain whether there is a displacement change between the raft 1 and the anti-floating pile 2, which is convenient for the technical personnel to handle in time afterwards.

[0032] In this embodiment, the drainage assembly includes a drainage pipe 14 that passes through the upper cylinder 8 and extends into the lower cylinder 9. The upper end of the drainage pipe 14 extends out of the upper cylinder 8 and is connected to the water collecting box through a water pump. The lower end of the drainage pipe 14 is lower than the first displacement sensor 15.

[0033] In actual use, by setting up a drainage component, it is convenient to extract and discharge the water that has seeped into the lower cylinder 9, which is not only convenient for subsequent detection of changes in groundwater composition and clarification of the erosion hazards of the foundation soil layer to the raft plate, but also can assist in clarifying the moisture content of the foundation soil layer based on the drainage volume and drainage interval time. It is reliable, stable and has good use effect.

[0034] like Figure 3 A method for detecting anti-seepage and anti-floating properties of a raft structure in a high water level area is shown, comprising the following steps: Step 1: Evenly distribute the detection devices: embed multiple detection devices in the raft 1. The multiple detection devices correspond to the multiple anti-floating piles 2 one by one and are closely arranged on the side walls of the anti-floating piles 2. The specific installation method of the detection devices is as follows: First, fix the lower cylinder 9 on the side wall of the anti-floating pile 2, then insert the lower end of the upper cylinder 8 into the upper end of the grid plate 10, and tie the water-stop steel plate 6 on the outside of the upper cylinder 8 to the steel bars in the raft 1. Then, construct the waterproof layer 4, cushion layer 3 and raft 1 in sequence, and use the concrete of the raft 1 to fix the upper cylinder 8. During actual construction, the grid plate 10 is fixedly connected to the side wall of the anti-floating pile 2 by an adhesive. The grid plate 10 is preferably a metal wire mesh. The upper end of the grid plate 10 is tightly wrapped around the outer side of the upper cylinder 8 by utilizing the tensile properties of the grid, thereby realizing the connection between the upper cylinder 8 and the lower cylinder 9.

[0035] During actual construction, a filling area 17 is left between the upper cylinder 8 and the anti-floating pile 2, and sealant is applied in the filling area 17. On the one hand, the sealant fills the gap between the top of the side of the lower cylinder 9 contacting the anti-floating pile 2 and the raft 1, thereby avoiding gaps in the waterproof layer 4. On the other hand, the area of ​​the sealant on the mesh plate 10 is small, which can strengthen the connectivity between the mesh plate 10 and the upper cylinder 8 in a small range, but does not completely restrict the movement of the mesh plate 10, so that the mesh plate 10 can move with the anti-floating pile 2.

[0036] Step 2: Collect and judge test data: Step 201, displacement change judgment: set the initial displacement X0 in the displacement detection component, and collect the displacement data X0 collected by the displacement detection component within time T through the PLC controller. i By comparing the initial displacement X0 and the displacement data X i , obtain the displacement change data of the upper cylinder 8 and the lower cylinder 9, and then obtain the displacement change of each anti-floating pile 2 and the raft 1; where X0, X i and T are both natural numbers not less than zero; Step 202, groundwater change determination: When there is no groundwater in the lower cylinder 9, the soil moisture content in the foundation soil layer is detected by the moisture content measuring component, the soil moisture content around each anti-floating pile 2 is obtained, and a time-moisture content change line graph is drawn; When groundwater accumulates in the lower cylinder 9, the groundwater seeping into the lower cylinder 9 is extracted and discharged through the drainage component, and the groundwater discharged by the drainage component is collected by the water collecting box. In the same period of time, the amount of water accumulated around each anti-floating pile 2 is judged according to the amount of water collected by each water collecting box, and then the number of pile positions that have exceeded the standard groundwater volume is determined.

[0037] During actual construction, the collected displacement changes are used to determine whether the anti-floating pile 2 has floated or moved horizontally, as well as the displacement of the floating or moving pile.

[0038] The time-water content change line graph can be used to obtain the change in underground soil moisture content over a long period of time after the raft 1 is completed, which is convenient for preventing quality problems of the raft 1 and anti-floating piles 2 under the influence of high water level groundwater in advance.

[0039] By extracting the groundwater accumulated in the detection device, not only can the amount of groundwater around the anti-floating piles 2 be reduced, making it easier for technicians to detect changes in groundwater composition, but it can also help technicians to promptly determine which anti-floating piles 2 have quality risks such as floating, that is, the more water there is in the water collection box, the greater the amount of groundwater around the corresponding anti-floating piles 2, and the higher the risk coefficient of the anti-floating piles 2.

[0040] The present invention installs a detection device on the side wall of each anti-floating pile 2, which facilitates timely judgment of the position change of each anti-floating pile 2 and the change of the surrounding water volume, thereby timely and effectively implementing anti-seepage and anti-floating measures for high water level areas, which is convenient for promotion and use.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A raft anti-seepage and anti-floating detection device in high water level areas, wherein the lower portion of the raft (1) is provided with anti-floating piles (2), and the lower portion of the raft (1) is further provided with a cushion layer (3) and a waterproof layer (4) located around the anti-floating piles (2), characterized in that: A detection device is provided inside the raft (1), the detection device comprising a sleeve (5), and a moisture content measuring component, a drainage component, and a displacement detection component are provided inside the sleeve (5); The casing (5) comprises an upper cylinder (8) and a lower cylinder (9) located at the lower part of the upper cylinder (8), a partition plate (7) is provided at the bottom of the upper cylinder (8), the upper cylinder (8) is wrapped in the waterproof layer (4) and the raft (1), the upper end of the upper cylinder (8) extends upward to the outside of the raft (1), the lower cylinder (9) extends downward into the foundation soil layer and is installed on the outer side wall of the anti-floating pile (2), the lower cylinder (9) comprises a grid plate (10) and a filter sleeve (11) covering the inner side of the grid plate (10), and the upper part of the grid plate (10) is tightly wrapped on the outer side wall of the lower part of the upper cylinder (8).

2. A raft anti-seepage and anti-floating detection device for high water level areas according to claim 1, characterized in that: A water-stop steel plate (6) is horizontally arranged on the outer side wall of the upper cylinder (8), and the water-stop steel plate (6) is located inside the raft plate (1).

3. The device for detecting anti-seepage and anti-floating of raft in high water level areas according to claim 1, characterized in that: The moisture content measuring assembly comprises a moisture content measuring instrument and a moisture content detection probe (13), wherein the upper end of the moisture content detection probe (13) extends out of the sleeve (5) and is connected to the moisture content measuring instrument, and the lower end of the moisture content detection probe (13) passes through the sleeve (5) and extends into the foundation soil layer, and the depth of the moisture content detection probe (13) extending into the foundation soil layer is at least 20 cm.

4. A raft anti-seepage and anti-floating detection device for high water level areas according to claim 3, characterized in that: The grid plate (10) is a double-layer staggered dense grid structure. A conical mouth (12) is provided at the lower portion of the grid plate (10). A through hole for extending a moisture content detection probe (13) is provided at the center of the conical mouth (12). A cross-hole rubber pad is provided in the through hole.

5. The device for detecting anti-seepage and anti-floating of raft in high water area according to claim 1, characterized in that: The displacement detection assembly comprises a first displacement sensor (15) mounted on the inner wall of the lower cylinder (9) and a second displacement sensor (16) mounted on the inner wall of the upper cylinder (8), wherein the second displacement sensor (16) is located inside the raft (1).

6. The device for detecting anti-seepage and anti-floating of raft in high water area according to claim 1, characterized in that: The drainage assembly comprises a drainage pipe (14) passing through the upper cylinder (8) and extending into the lower cylinder (9); the upper end of the drainage pipe (14) extends outside the upper cylinder (8) and is connected to the water collection box via a water pump; the lower end of the drainage pipe (14) is lower than the first displacement sensor (15).

7. A method for performing anti-seepage and anti-floating testing on a raft using the anti-seepage and anti-floating testing device according to claim 1, characterized in that: The method comprises the following steps: Step 1: Evenly distribute and install the detection devices: embed multiple detection devices in the raft (1). The multiple detection devices correspond to the multiple anti-floating piles (2) one by one and are closely arranged on the side walls of the anti-floating piles (2). The specific installation method of the detection devices is as follows: First, the lower cylinder (9) is fixed on the side wall of the anti-floating pile (2), and then the lower end of the upper cylinder (8) is inserted into the upper end of the grid plate (10), and the water-stop steel plate (6) on the outside of the upper cylinder (8) is tied and fixed with the steel bars in the raft (1), and then the waterproof layer (4), the cushion layer (3) and the raft (1) are constructed in sequence, and the upper cylinder (8) is fixed by using the concrete of the raft (1); Step 2: Collect and judge test data: Step 201, displacement change judgment: set the initial displacement X0 in the displacement detection component, and collect the displacement data X0 collected by the displacement detection component within time T through the PLC controller. i By comparing the initial displacement X0 and the displacement data X i , obtain the displacement change data of the upper cylinder (8) and the lower cylinder (9), and then obtain the displacement change of each anti-floating pile (2) and the raft (1); wherein, X0, X i and T are both natural numbers not less than zero; Step 202, groundwater change judgment: when there is no groundwater in the lower cylinder (9), the soil moisture content in the foundation soil layer is detected by the moisture content measuring component, the soil moisture content around each anti-floating pile (2) is obtained, and a time-moisture content change line graph is drawn; When groundwater accumulates in the lower cylinder (9), the groundwater that has seeped into the lower cylinder (9) is extracted and discharged through the drainage assembly, and the groundwater discharged by the drainage assembly is collected by the water collecting box. In the same period of time, the amount of water accumulated around each anti-floating pile (2) is judged based on the amount of water collected by each water collecting box, and the number of pile positions that have exceeded the standard groundwater volume is determined.

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