Method for detecting and positioning leakage of waterproof curtain of foundation pit through layered pore pressure monitoring device

Abstract

The invention relates to the technical field of foundation pit water stop monitoring, and discloses a method for detecting and positioning leakage of a foundation pit water stop curtain through a layered pore pressure monitoring device, and the method comprises the following steps: S1, planning all initial preset point positions around the periphery of a foundation pit; s2, the inner wall of the foundation pit is divided into a plurality of sub-areas; s3, all leakage point location information existing on the inner wall of the foundation pit is counted; s4, judging the leakage risk of each sub-region according to the leakage point location information in the range of each sub-region; and S5, according to the leakage risk judgment of each sub-region, obtaining a final foundation pit peripheral pore pressure meter embedding point location. According to the method, the inner wall of the foundation pit is divided into a plurality of sub-areas, the leakage risk is evaluated according to the parameters of the leakage points where leakage possibly exists in each sub-area, the preset point positions in different modes are selected according to the leakage risk of each sub-area, and the final construction drawing of the hole pressure meter point positions on the periphery of the foundation pit is obtained. Therefore, multi-soil-layer foundation pit waterproof curtain leakage monitoring construction is realized.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit water-stopping monitoring, and in particular to a method for detecting and locating leakage of a foundation pit water-stopping curtain by a layered pore pressure monitoring device. Background Art

[0002] The foundation pit is an earth pit excavated at the foundation design position according to the base elevation and foundation plane dimensions. The existing foundation pit water-stopping technology is to construct reinforced concrete piles side by side outside the foundation pit to form a water-stopping curtain. The water-stopping curtain can not only reduce the continuous water-stopping body adopted to reduce the infiltration of groundwater from the bottom and side walls of the foundation pit into the foundation pit, but also reduce the possibility of deformation of the foundation pit due to soil pressure.

[0003] When constructing underground projects in areas with complex hydrogeological conditions, in order to ensure construction safety, real-time monitoring of groundwater at multiple depths and points is often carried out, and construction plans are adjusted in a timely manner based on the monitoring results to avoid groundwater-related accidents such as sudden inrush and leakage in foundation pits.

[0004] However, the method of burying multi-point piezometers in the prior art still has limitations in actual use. In the prior art, the preset points for burying piezometers are usually evenly distributed around the periphery of the foundation pit. However, in the actual construction process, according to the soil layer distribution of the site where the foundation pit is located, there may be multiple leakage points on the inner wall of the foundation pit, and the risks that may be caused by the distribution of leakage points in different soil layers are different. Therefore, the monitoring of areas with high leakage risks on the inner wall of the foundation pit needs to be more precise. The existing method of evenly burying piezometers around the periphery of the foundation pit is difficult to apply to complex foundation pit construction with multiple soil layers. Therefore, there is an urgent need for a technical solution that can be applied to multi-soil layer foundation pits and provide high-accuracy monitoring data. Summary of the invention

[0005] The purpose of the present invention is to provide a method for detecting and locating leakage of a foundation pit water-stopping curtain by using a layered pore pressure monitoring device, so as to solve the problems in the prior art.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A method for detecting and locating leakage of a foundation pit water-stop curtain using a layered pore pressure monitoring device comprises the following steps: S1: Based on the geological survey data, the typical soil layer distribution of the foundation pit site is determined, and all the initial preset points for burying the piezometer device are planned around the periphery of the foundation pit; S2: Divide the inner wall of the foundation pit into multiple vertical strip-shaped sub-areas, and count the initial preset points within the range of each sub-area; S3: Count all the leakage point information on the inner wall of the foundation pit, and count each leakage point into the corresponding sub-area according to its location; S4: Determine the leakage risk of each sub-area according to the leakage point information within each sub-area; S5: Determine whether to modify the initial preset points in each sub-area based on the leakage risk of each sub-area. If it is judged to be risk-free, there is no need to modify the initial preset points of the corresponding sub-area; if it is judged to be risky, modify the initial preset points within the corresponding sub-area until the leakage risk determination of all sub-areas is completed and the final burial points of the piezometers around the foundation pit are obtained.

[0007] As a preferred solution of the present invention, in step S1, the piezometer device has multiple sensors for detecting pore water pressure information, and the multiple sensors are respectively used to detect water pressure information of different soil layers in the soil, and the multiple sensors are installed in the same pipe body, and the pipe body is vertically buried in any initial burial point.

[0008] As a preferred embodiment of the present invention, the plurality of initial preset points are sequentially distributed along the periphery of the foundation pit, and all the initial preset points are spaced apart from the nearest inner wall of the foundation pit, and there is a distance D1 between any two adjacent initial preset points.

[0009] As a preferred embodiment of the present invention, in step S2, the sub-area is a vertical strip area on the inner wall of the foundation pit, the lower end of the sub-area extends to the bottom of the foundation pit, and the upper end of the sub-area extends to the top of the foundation pit, and there are 3 initial preset points in the atmosphere of any sub-area.

[0010] As a preferred solution of the present invention, in step S3, the leakage points are points on the inner wall of the foundation pit where groundwater leakage occurs, and the leakage point information includes: the number of leakage points and the soil layer positions of the leakage points.

[0011] As a preferred solution of the present invention, in step S4, the specific steps of determining the leakage risk of each sub-area are: S41: Count the number of leakage points in any sub-area. If there is no leakage point in the sub-area, the leakage risk of the sub-area is determined to be no risk; if the number of leakage points is greater than 2, the leakage risk of the sub-area is determined to be high risk; if the number of leakage points is less than or equal to 2, proceed to the next step; S42: Counting soil layer information of all leakage points in the sub-area. If there is only one leakage point in the sub-area, proceed to the next step; if there are two leakage points and the two leakage points are in the same soil layer, the leakage risk in the sub-area is determined to be suspected high risk; if the two leakage points are not in the same soil layer, proceed to the next step; S43: Counting soil layer information of all leakage points in the sub-regions adjacent to the sub-region; if there is no leakage point in the adjacent sub-region, the leakage risk in the sub-region is determined to be low risk; if there is a leakage point in the adjacent sub-region, but it is not in the same soil layer as any leakage point in the sub-region, the leakage risk in the sub-region is determined to be low risk; if there is a leakage point in the adjacent sub-region, and it is in the same soil layer as any leakage point in the sub-region, the leakage risk in the sub-region is determined to be high risk; S44: Repeat steps S41-S43 until the leakage risk of all sub-areas is determined.

[0012] As a preferred solution of the present invention, in step S42, if the distance between two leakage points in the same soil layer is not greater than D2, the leakage risk in the sub-area is determined to be high risk; if the distance between two leakage points in the same soil layer is greater than D2, further risk determination is performed, and the specific steps are as follows: S421: Determine whether there is a leakage point in the adjacent sub-area. If not, determine that the leakage risk in the sub-area is low risk; if yes, execute the next step; S422: Determine whether there is a leakage point in the same soil layer in the adjacent sub-areas. If so, determine that the leakage risk in the sub-area is high risk; if not, execute the next step; S423: Determine whether the distance between any leakage point in an adjacent sub-region and any leakage point in the sub-region is greater than D2. If so, determine that the leakage risk in the sub-region is low risk; if not, determine that the leakage risk in the sub-region is high risk.

[0013] As a preferred solution of the present invention, in step S5, modifying the initial preset point within the sub-area range specifically includes low-risk modification and high-risk modification; The low-risk modification is: delete the initial preset point in the middle of the sub-area, add two new preset points, keep the two initial preset points in the sub-area unchanged, make the spacing of the four preset points in the sub-area consistent, and the distribution mode composed of four preset points is the first preset point; The high-risk modification is: add two new preset points in the sub-area, and the two new preset points are staggered with the three initial preset points in the sub-area, so that the spacing between the five preset points in the sub-area is consistent, and this distribution method consisting of five preset points is the second preset point.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention divides the inner wall of the foundation pit into multiple sub-areas, and evaluates the leakage risk according to the parameters of the leakage points that may exist in each sub-area, so that each sub-area is evaluated as no risk, low risk and high risk. The initial preset point position of the no-risk sub-area does not need to be changed, the initial preset point position of the low-risk sub-area needs to be changed to the first preset point position, and the initial preset point position of the high-risk sub-area needs to be changed to the second preset point position, so as to obtain the final foundation pit periphery piezometer point construction drawing, thereby realizing the multi-soil layer foundation pit water-stop curtain leakage monitoring construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] Figure 1 The figure is an overall flow chart of the method according to the embodiment of the present invention.

[0017] Figure 2 It is a front cross-sectional view of the construction scheme of the present invention.

[0018] Figure 3 It is a top view of the construction scheme of the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0021] Embodiment 1 Example Combine the following Figures 1 to 3 As shown, the embodiment of the present invention provides a method for detecting and locating leakage of a foundation pit water-stop curtain using a layered pore pressure monitoring device, comprising the following steps: S1: Based on the geological survey data, the typical soil layer distribution of the foundation pit site is determined, and all the initial preset points for burying the piezometer device are planned around the periphery of the foundation pit; In step S1, the piezometer device has a plurality of sensors for detecting pore water pressure information, the plurality of sensors are respectively used to detect water pressure information of different soil layers in the soil, and the plurality of sensors are installed in the same pipe body, and the pipe body is vertically buried at any initial burial point; The plurality of initial preset points are sequentially distributed along the periphery of the foundation pit, and all the initial preset points are spaced apart from the nearest inner wall of the foundation pit, and there is a distance D1 between any two adjacent initial preset points; S2: Divide the inner wall of the foundation pit into multiple vertical strip-shaped sub-areas, and count the initial preset points within the range of each sub-area; In step S2, the sub-area is a vertical strip area on the inner wall of the foundation pit, the lower end of the sub-area extends to the bottom of the foundation pit, and the upper end of the sub-area extends to the top of the foundation pit, and there are 3 initial preset points in the atmosphere of any sub-area; S3: Count all the leakage point information on the inner wall of the foundation pit, and count each leakage point into each sub-area according to its location; In step S3, the leakage points are points on the inner wall of the foundation pit where groundwater leakage occurs, and the leakage point information includes: the number of leakage points and the soil layer positions where the leakage points are located; S4: Determine the leakage risk of each sub-area according to the leakage point information within each sub-area; In step S4, the specific steps of determining the leakage risk of each sub-area are: S41: Count the number of leakage points in any sub-area. If there is no leakage point in the sub-area, the leakage risk of the sub-area is determined to be no risk; if the number of leakage points is greater than 2, the leakage risk of the sub-area is determined to be high risk; if the number of leakage points is less than or equal to 2, proceed to the next step; S42: Counting soil layer information of all leakage points in the sub-area. If there is only one leakage point in the sub-area, proceed to the next step; if there are two leakage points and the two leakage points are in the same soil layer, the leakage risk in the sub-area is determined to be suspected high risk; if the two leakage points are not in the same soil layer, proceed to the next step; In step S42, if the distance between two leakage points in the same soil layer is not greater than D2, the leakage risk in the sub-area is determined to be high risk; if the distance between two leakage points in the same soil layer is greater than D2, further risk determination is performed, and the specific steps are as follows: S421: Determine whether there is a leakage point in the adjacent sub-area. If not, determine that the leakage risk in the sub-area is low risk; if yes, execute the next step; S422: Determine whether there is a leakage point in the same soil layer in the adjacent sub-areas. If so, determine that the leakage risk in the sub-area is high risk; if not, execute the next step; S423: Determine whether the distance between any leakage point in the adjacent sub-region and any leakage point in the sub-region is greater than D2. If so, determine that the leakage risk in the sub-region is low risk; if not, determine that the leakage risk in the sub-region is high risk; S43: Counting soil layer information of all leakage points in the sub-regions adjacent to the sub-region; if there is no leakage point in the adjacent sub-region, the leakage risk in the sub-region is determined to be low risk; if there is a leakage point in the adjacent sub-region, but it is not in the same soil layer as any leakage point in the sub-region, the leakage risk in the sub-region is determined to be low risk; if there is a leakage point in the adjacent sub-region, and it is in the same soil layer as any leakage point in the sub-region, the leakage risk in the sub-region is determined to be high risk; S44: repeating steps S41-S43 until the leakage risk of all sub-areas is determined; S5: Determine whether to modify the initial preset points in each sub-area based on the leakage risk of each sub-area. If it is judged to be risk-free, there is no need to modify the initial preset points of the corresponding sub-area; if it is judged to be risky, modify the initial preset points within the corresponding sub-area until the leakage risk determination of all sub-areas is completed and the final burial points of the piezometers around the foundation pit are obtained.

[0022] In the step S5, modifying the initial preset points within the sub-area specifically includes low-risk modification and high-risk modification; The low-risk modification is: delete the initial preset point in the middle of the sub-area, add two new preset points, keep the two initial preset points in the sub-area unchanged, make the spacing of the four preset points in the sub-area consistent, and the distribution mode composed of four preset points is the first preset point; For example, the distance between the three initial preset points in the initial preset point position is D1, and the distance between the four preset points in the first preset point position is .

[0023] The high-risk modification is: add two new preset points in the sub-area, and the two new preset points are staggered with the three initial preset points in the sub-area, so that the spacing between the five preset points in the sub-area is consistent, and this distribution method consisting of five preset points is the second preset point.

[0024] For example, the distance between the three initial preset points in the initial preset point position is D1, and the distance between the five preset points in the second preset point position is .

[0025] In the accompanying drawings, A represents a low-risk area, B represents a high-risk area, C1 represents an initial preset point, C2 represents a new preset point, E represents a leakage point, and F represents a piezometer device. In addition, D1 and D2 appearing in this embodiment are preset according to actual construction parameters.

[0026] The present invention divides the inner wall of the foundation pit into multiple sub-areas, and evaluates the leakage risk according to the parameters of the leakage points that may exist in each sub-area, so that each sub-area is evaluated as no risk, low risk and high risk. The initial preset point position of the no-risk sub-area does not need to be changed, the initial preset point position of the low-risk sub-area needs to be changed to the first preset point position, and the initial preset point position of the high-risk sub-area needs to be changed to the second preset point position, so as to obtain the final foundation pit periphery piezometer point construction drawing, thereby realizing the multi-soil layer foundation pit water-stop curtain leakage monitoring construction.

[0027] Embodiment 2 This embodiment includes a computer-readable storage medium, on which a data processing program is stored. The data processing program is executed by a processor to implement the method for locating leakage of a foundation pit water-stopping curtain according to the first embodiment.

[0028] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A method for detecting and locating leakage of foundation pit water-stop curtain using a layered pore pressure monitoring device, characterized in that: The steps include: S1: Based on the geological survey data, the typical soil layer distribution of the foundation pit site is determined, and all the initial preset points for burying the piezometer device are planned around the periphery of the foundation pit; S2: Divide the inner wall of the foundation pit into multiple vertical strip-shaped sub-areas, and count the initial preset points within the range of each sub-area; S3: Count all the leakage point information on the inner wall of the foundation pit, and count each leakage point into the corresponding sub-area according to its location; S4: Determine the leakage risk of each sub-area according to the leakage point information within each sub-area; S5: Determine whether to modify the initial preset points in each sub-area according to the leakage risk of each sub-area. If it is determined that there is no risk, there is no need to modify the initial preset points in the corresponding sub-area; If it is determined to be risky, the initial preset points within the corresponding sub-area will be modified until the leakage risk determination of all sub-areas is completed and the final burial points of the piezometers around the foundation pit are obtained.

2. The method for detecting and locating leakage of foundation pit water-stop curtain by using a layered pore pressure monitoring device according to claim 1 is characterized in that: In step S1, the piezometer device has multiple sensors for detecting pore water pressure information, and the multiple sensors are respectively used to detect water pressure information of different soil layers in the soil. The multiple sensors are installed in the same pipe body, and the pipe body is vertically buried in any initial burial point.

3. The method for detecting and locating leakage of foundation pit water-stop curtain by using a layered pore pressure monitoring device according to claim 2 is characterized in that: The plurality of initial preset points are sequentially distributed along the periphery of the foundation pit, and all the initial preset points are spaced apart from the nearest inner wall of the foundation pit, and there is a distance D1 between any two adjacent initial preset points.

4. The method for detecting and locating leakage of foundation pit water-stop curtain by using a layered pore pressure monitoring device according to claim 1 is characterized in that: In step S2, the sub-area is a vertical strip area on the inner wall of the foundation pit, the lower end of the sub-area extends to the bottom of the foundation pit, and the upper end of the sub-area extends to the top of the foundation pit. There are 3 initial preset points in the atmosphere of any sub-area.

5. The method for detecting and locating leakage of foundation pit water-stop curtain by using a layered pore pressure monitoring device according to claim 4 is characterized in that: In step S3, the leakage points are points on the inner wall of the foundation pit where groundwater leakage occurs, and the leakage point information includes: the number of leakage points and the soil layer positions of the leakage points.

6. The method for detecting and locating leakage of foundation pit water-stop curtain by using a layered pore pressure monitoring device according to claim 5 is characterized in that: In step S4, the specific steps of determining the leakage risk of each sub-area are: S41: Count the number of leakage points in any sub-area. If there is no leakage point in the sub-area, the leakage risk of the sub-area is determined to be no risk; if the number of leakage points is greater than 2, the leakage risk of the sub-area is determined to be high risk; if the number of leakage points is less than or equal to 2, proceed to the next step; S42: Counting soil layer information of all leakage points in the sub-area. If there is only one leakage point in the sub-area, proceed to the next step; if there are two leakage points and the two leakage points are in the same soil layer, the leakage risk in the sub-area is determined to be suspected high risk; if the two leakage points are not in the same soil layer, proceed to the next step; S43: Counting soil layer information of all leakage points in the sub-regions adjacent to the sub-region; if there is no leakage point in the adjacent sub-region, the leakage risk in the sub-region is determined to be low risk; if there is a leakage point in the adjacent sub-region, but it is not in the same soil layer as any leakage point in the sub-region, the leakage risk in the sub-region is determined to be low risk; if there is a leakage point in the adjacent sub-region, and it is in the same soil layer as any leakage point in the sub-region, the leakage risk in the sub-region is determined to be high risk; S44: Repeat steps S41-S43 until the leakage risk of all sub-areas is determined.

7. The method for detecting and locating leakage of foundation pit water-stop curtain by using a layered pore pressure monitoring device according to claim 6 is characterized in that: In step S42, if the distance between two leakage points in the same soil layer is not greater than D2, the leakage risk in the sub-area is determined to be high risk; if the distance between two leakage points in the same soil layer is greater than D2, further risk determination is performed, and the specific steps are as follows: S421: Determine whether there is a leakage point in the adjacent sub-area. If not, determine that the leakage risk in the sub-area is low risk; if yes, execute the next step; S422: Determine whether there is a leakage point in the same soil layer in the adjacent sub-areas. If so, determine that the leakage risk in the sub-area is high risk; if not, execute the next step; S423: Determine whether the distance between any leakage point in an adjacent sub-region and any leakage point in the sub-region is greater than D2. If so, determine that the leakage risk in the sub-region is low risk; if not, determine that the leakage risk in the sub-region is high risk.

8. The method for detecting and locating leakage of foundation pit water-stop curtain by using a layered pore pressure monitoring device according to claim 7 is characterized in that: In the step S5, modifying the initial preset points within the sub-area specifically includes low-risk modification and high-risk modification; The low-risk modification is: delete the initial preset point in the middle of the sub-area, add two new preset points, keep the two initial preset points in the sub-area unchanged, make the spacing of the four preset points in the sub-area consistent, and the distribution mode composed of four preset points is the first preset point; The high-risk modification is: add two new preset points in the sub-area, and the two new preset points are staggered with the three initial preset points in the sub-area, so that the spacing between the five preset points in the sub-area is consistent, and this distribution method consisting of five preset points is the second preset point.

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