Static pressure type recoverable layered pore pressure monitoring device and using method thereof

Abstract

The invention relates to the technical field of underground water pore pressure monitoring, and discloses a static pressure type recoverable layered pore pressure monitoring device and a using method thereof.The monitoring device comprises a plurality of static pressure feeler levers, each static pressure feeler lever is internally provided with a pore water pressure gauge and a connecting bus, and the top end and the bottom end of each static pressure feeler lever are provided with connecting threads; a plurality of static pressure feeler levers can be screwed end to end through the connecting threads, and the outer part of each static pressure feeler lever is provided with a circular hole through which external water can flow into an internal pore water pressure gauge; and the pore water pressure gauge is arranged in the static pressure probe rod by being connected with a protruding permeable stone. According to the layered pore pressure monitoring device, the layered pore pressure monitoring device is split into a mode of splicing a plurality of device suites, each device suite is internally integrated with a pore water pressure gauge and a connecting bus, and the plurality of sections of device suites can be pressed into a soil layer by using static pressure equipment after being spliced, so that the operation steps of burying monitoring equipment are simplified, and the working efficiency is improved. And the whole monitoring equipment can be recycled by upwards pulling the device suite on the soil layer through static pressure equipment.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater pore pressure monitoring, and in particular to a static pressure type recoverable layered pore pressure monitoring device and a use method thereof. Background Art

[0002] 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.

[0003] When monitoring groundwater, the prior art usually drills an observation well or buries a piezometer to monitor a single depth aquifer. For example, the patent document with the announcement number CN116754042B proposes an installation method for a groundwater pore pressure monitoring device based on a piezometer, which is set in a preset hole on the ground and includes a control module, a pressure measuring tube, a piezometer and a winding mechanism. The invention does not need to mark the lowering length of the piezometer cable, and can realize the automatic, fast and accurate installation of the piezometer. However, the prior art still has limitations in actual use, including high cost of drilling observation wells, many construction workers, and a single depth of observed aquifers, complex construction when burying piezometers, low monitoring efficiency, and non-recyclable related equipment.

[0004] In summary, the existing groundwater monitoring devices are complex to construct and have low recycling efficiency, making it difficult to monitor the groundwater environment over a large area with multiple aquifers. There is an urgent need for a technical solution that simplifies the construction, makes the monitoring equipment recyclable, and can monitor the groundwater environment over a large area with multiple aquifers. Summary of the invention

[0005] The purpose of the present invention is to provide a static pressure type recoverable layered pore pressure monitoring device and its use method, so as to solve the problems of complex construction, low recycling efficiency and difficulty in monitoring the groundwater environment in a large range of multiple aquifers in the prior art.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: A static pressure type recoverable layered pore pressure monitoring device, comprising a plurality of static pressure probes, each of which is equipped with a pore water pressure gauge and a connection bus, the top and bottom of the static pressure probes are provided with connection threads, and the plurality of static pressure probes can be screwed end to end through the connection threads, and the outside of the static pressure probes is provided with a circular hole that allows external water to flow into the pore water pressure gauge inside; The pore water pressure gauge is installed inside the static pressure probe rod by connecting with a protruding permeable stone. The protruding permeable stone is provided with a wire hole for the connection bus to pass through. The upper and lower ends of the connection bus are connected with quick connectors. Two adjacent connection buses are electrically connected through the corresponding two quick connectors.

[0007] As a preferred solution of the present invention, a waterproof gasket is provided between two adjacent screw-connected static pressure probe rods, and a static pressure cone tip is screwed onto the bottom end of the lowest static pressure probe rod among the multiple static pressure probe rods.

[0008] As a preferred solution of the present invention, a plurality of static pressure probes connected end to end and the static pressure cone tip at the bottom are pressed into the soil layer section by section by a static pressure device, and the connection bus in the static pressure probe at the top is connected to an automated data collector.

[0009] In order to further implement the above technical solution, a method for using a static pressure type recoverable layered pore pressure monitoring device is also provided, comprising the following steps: S1: According to the geological survey data, the typical soil layer distribution and the preset pore water pressure gauge points of the site are determined, and the number and range of the device kit are determined according to the engineering monitoring requirements. The device kit includes: static pressure probe rod, pore water pressure gauge and connection bus; S2: After the connection buses of each device set are electrically connected in sequence, the static pressure probes of each device set are connected end to end, and a static pressure cone tip is installed at the bottom of the static pressure probe of the device set at the bottom; S3: Use static pressure equipment to press the static pressure cone tip and the multi-section device kit into the soil layer section by section, connect the device kit at the top to the automatic data collector, and conduct single-point multi-depth groundwater pore pressure monitoring; S4: After the monitoring device is used, each section of the device kit can be pulled out of the soil layer and recovered through static pressure equipment, and can be reused after cleaning.

[0010] As a preferred solution of the present invention, in step S1, the pore water pressure meter is electrically connected to the connection bus and installed inside the static pressure probe rod through a protruding permeable stone, and the bus is electrically connected to quick connectors at the upper and lower ends after passing through the protruding permeable stone.

[0011] As a preferred solution of the present invention, the pore water pressure gauge needs to be measured and calibrated before installation, and the protruding permeable stone is located near the circular hole in the static pressure probe rod so that external groundwater can flow through the detection part of the pore water pressure gauge.

[0012] As a preferred solution of the present invention, in step S2, the connection buses of each device kit are electrically connected in sequence by successively plugging the lower end connection joints of the connection buses in the static pressure probe rod located in the upper section of the upper and lower device kits with the upper end connection joints of the connection buses in the static pressure probe rod located in the lower section, and repeating this step until the connection buses of all device kits are connected in series; The static pressure probe rods of each device kit are connected end to end in the following way: connecting threads are provided at the upper and lower ends of each static pressure probe rod, and two adjacent static pressure probe rods are screwed together into an integrated structure through the connecting threads, and this operation is repeated until the static pressure probe rods of all device kits are connected.

[0013] As a preferred solution of the present invention, in step S2, when the depths of two adjacent locations to be detected in the site stratum are far apart, the pore water pressure gauge may not be installed in the static pressure probe rod at the corresponding position, and only the connecting bus in the static pressure probe rod section is electrically connected to the connecting bus in one or two adjacent static pressure probe rods, and the circular hole on the static pressure probe rod section is sealed.

[0014] As a preferred solution of the present invention, in step S3, before using the static pressure equipment to press the device, lubricant is applied to the outer shells of the static pressure probe rods and static pressure cone tips that have been screwed together.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention divides the layered pore pressure monitoring device into multiple device kits for assembly. Each device kit is integrated with a pore water pressure gauge and a connection bus. After the multiple device kits are assembled, they can be pressed into the soil layer using a static pressure device, which simplifies the operation steps of burying the monitoring device. The device kit located on the soil layer can be pulled up by the static pressure device to recover the entire monitoring device, saving the use cost. (2) The present invention can adaptively adjust the installation positions and quantities of pore water pressure gauges at corresponding positions in multiple device kits according to the spacing between monitoring points required in an actual multi-aquifer groundwater environment, thereby improving the application scope and monitoring efficiency of the monitoring equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a cross-sectional view of the device kit in the first embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the overall construction of the device in Example 1 of the present invention.

[0019] Figure 3 This is an overall flow chart of the method used in the second embodiment of the present invention.

[0020] Reference numerals: 1. Static pressure probe rod; 2. Pore water pressure gauge; 3. Connection bus; 4. Quick connector; 5. Protruding permeable stone; 6. Connection thread; 7. Static pressure cone tip; 8. Static pressure equipment; 9. Automated data acquisition instrument. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] Embodiment 1 Combine the following Figure 1 to Figure 2 As shown, an embodiment of the present invention provides a static pressure type recoverable layered pore pressure monitoring device, including multiple static pressure probe rods 1, each static pressure probe rod 1 is equipped with a pore water pressure gauge 2 and a connection bus 3, the top and bottom ends of the static pressure probe rod 1 are provided with connecting threads 6, and multiple static pressure probe rods 1 can be screwed end to end through the connecting threads 6, and the outside of the static pressure probe rod 1 is provided with a circular hole that allows external water to flow into the pore water pressure gauge 2 inside it; The pore water pressure gauge 2 is installed inside the static pressure probe rod 1 by connecting with a protruding permeable stone 5. A wire hole for passing the connecting bus 3 is opened on the protruding permeable stone 5. The upper and lower ends of the connecting bus 3 are connected with quick connectors 4. Two adjacent connecting buses 3 are electrically connected through two corresponding quick connectors 4.

[0024] A waterproof gasket is arranged between two adjacently screwed static pressure probe rods 1 , and a static pressure cone tip 7 is screwed on the bottom end of the lowest static pressure probe rod 1 among the multiple static pressure probe rods 1 .

[0025] The static pressure equipment 8 presses multiple static pressure probes 1 connected end to end and the static pressure cone tip 7 at the bottom into the soil layer section by section, and the connection bus 3 in the static pressure probe 1 at the top is connected to the automatic data collector 9.

[0026] The present invention divides the layered pore pressure monitoring device into a plurality of device kits for assembly, each of which is integrated with a pore water pressure gauge 2 and a connection bus 3. After the plurality of device kits are spliced ​​together, they can be pressed into the soil layer using a static pressure device 8, thereby simplifying the operation steps of burying the monitoring device. The device kit located on the soil layer can be pulled up by the static pressure device 8 to recover the entire monitoring device, thereby saving the use cost.

[0027] The present invention can adaptively adjust the installation positions and quantities of pore water pressure gauges at corresponding positions in multiple device kits according to the spacing between monitoring points required in an actual multi-aquifer groundwater environment, thereby improving the application scope and monitoring efficiency of the monitoring equipment.

[0028] Embodiment 2 Combine the following Figure 3 As shown, in order to further implement the above technical solution, a method for using a static pressure type recoverable layered pore pressure monitoring device is also provided, comprising the following steps: S1: According to the geological survey data, the typical soil layer distribution and the preset pore water pressure gauge points of the site are determined, and the number and range of the device kit are determined according to the engineering monitoring requirements. The device kit includes: static pressure probe, pore water pressure gauge and connection bus; In step S1, the pore water pressure meter is electrically connected to the connection bus and installed inside the static pressure probe through a protruding permeable stone, and the bus is electrically connected to the protruding permeable stone and connected to quick connectors at both the upper and lower ends; The pore water pressure meter needs to be measured and calibrated before installation, highlighting the position of the permeable stone near the circular hole in the static pressure probe rod so that the external groundwater can flow through the detection part of the pore water pressure meter; S2: After the connection buses of each device set are electrically connected in sequence, the static pressure probes of each device set are connected end to end, and a static pressure cone tip is installed at the bottom of the static pressure probe of the device set at the bottom; In step S2, the connection buses of each device kit are electrically connected in sequence by successively plugging the lower end connection joints of the connection buses in the static pressure probe rod located in the upper section of the upper and lower device kits with the upper end connection joints of the connection buses in the static pressure probe rod located in the lower section, and repeating this step until the connection buses of all device kits are connected in series; The end-to-end connection method of the static pressure probe rods of each device kit is as follows: connecting threads are provided at the upper and lower ends of each static pressure probe rod, and two adjacent static pressure probe rods are screwed together into an integrated structure through the connecting threads, and this operation is repeated until the static pressure probe rods of all device kits are connected; In step S2, when the depths of two adjacent locations to be detected in the site stratum are far apart, the pore water pressure gauge may not be installed in the static pressure probe rod at the corresponding position, and only the connection bus in the static pressure probe rod section is electrically connected to the connection bus in one or two adjacent static pressure probe rods, and the circular hole on the static pressure probe rod section is blocked; S3: Use static pressure equipment to press the static pressure cone tip and the multi-section device kit into the soil layer section by section, connect the device kit at the top to the automatic data collector, and conduct single-point multi-depth groundwater pore pressure monitoring; In step S3, before using the static pressure equipment to press the device, lubricant is applied to the outer shells of the static pressure probe rods and the static pressure cone tips that have been screwed together; S4: After the monitoring device is used, each section of the device kit can be pulled out of the soil layer and recovered through static pressure equipment, and can be reused after cleaning.

[0029] Embodiment 3 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 provide a method for using a static pressure-type recoverable stratified pore pressure monitoring device according to embodiment 2.

[0030] 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 static pressure type recoverable layered pore pressure monitoring device, characterized in that: The invention comprises a plurality of static pressure probe rods (1), each of which is equipped with a pore water pressure gauge (2) and a connection bus (3). The top and bottom ends of the static pressure probe rods (1) are provided with connection threads (6). The plurality of static pressure probe rods (1) can be screwed end to end via the connection threads (6). The outside of the static pressure probe rods (1) is provided with a circular hole that allows external water to flow into the pore water pressure gauge (2) inside the static pressure probe rods; The pore water pressure gauge (2) is installed inside the static pressure probe rod (1) by being connected to a protruding permeable stone (5); a wire hole for passing the connecting bus (3) is provided on the protruding permeable stone (5); the upper and lower ends of the connecting bus (3) are both connected to quick connectors (4); two adjacent connecting buses (3) are electrically connected via the corresponding two quick connectors (4).

2. A static pressure type recoverable layered pore pressure monitoring device according to claim 1, characterized in that: A waterproof gasket is provided between two adjacently screwed static pressure probe rods (1), and a static pressure cone tip (7) is screwed on the bottom end of the lowest static pressure probe rod (1) among the plurality of static pressure probe rods (1).

3. A static pressure type recoverable layered pore pressure monitoring device according to claim 2, characterized in that: The static pressure equipment (8) presses the plurality of static pressure probes (1) connected end to end and the static pressure cone tip (7) at the bottom into the soil layer section by section, and the connection bus (3) in the static pressure probe (1) at the top is connected to an automatic data collector (9).

4. A method for using the static pressure type recoverable layered pore pressure monitoring device according to any one of claims 1 to 3, characterized in that: The steps include: S1: According to the geological survey data, the typical soil layer distribution and the preset pore water pressure gauge points of the site are determined, and the number and range of the device kit are determined according to the engineering monitoring requirements. The device kit includes: static pressure probe rod, pore water pressure gauge and connection bus; S2: After the connection buses of each device set are electrically connected in sequence, the static pressure probes of each device set are connected end to end, and a static pressure cone tip is installed at the bottom of the static pressure probe of the device set at the bottom; S3: Use static pressure equipment to press the static pressure cone tip and the multi-section device kit into the soil layer section by section, connect the device kit at the top to the automatic data collector, and conduct single-point multi-depth groundwater pore pressure monitoring; S4: After the monitoring device is used, each section of the device kit can be pulled out of the soil layer and recovered through static pressure equipment, and can be reused after cleaning.

5. The method of use according to claim 4, characterized in that: In step S1, the pore water pressure meter is electrically connected to the connection bus and installed inside the static pressure probe rod through a protruding permeable stone, and the bus is electrically connected to quick connectors at both the upper and lower ends after passing through the protruding permeable stone.

6. The method of use according to claim 5, characterized in that: The pore water pressure gauge needs to be measured and calibrated before installation. The protruding permeable stone is located in the static pressure probe rod near the circular hole so that external groundwater can flow through the detection part of the pore water pressure gauge.

7. The method of use according to claim 6, characterized in that: In step S2, the connection buses of each device kit are electrically connected in sequence by successively plugging the lower end connection joints of the connection buses in the static pressure probe rod located in the upper section of the upper and lower device kits with the upper end connection joints of the connection buses in the static pressure probe rod located in the lower section, and repeating this step until the connection buses of all device kits are connected in series; The static pressure probe rods of each device kit are connected end to end in the following way: connecting threads are provided at the upper and lower ends of each static pressure probe rod, and two adjacent static pressure probe rods are screwed together into an integrated structure through the connecting threads, and this operation is repeated until the static pressure probe rods of all device kits are connected.

8. The method of use according to claim 7, characterized in that: In step S2, when the depths of two adjacent locations to be detected in the site stratum are far apart, the pore water pressure gauge may not be installed in the static pressure probe rod at the corresponding position, and only the connecting bus in the static pressure probe rod section is electrically connected to the connecting bus in one or two adjacent static pressure probe rods, and the circular hole on the static pressure probe rod section is sealed.

9. The method of use according to claim 5, characterized in that: In step S3, before using the static pressure equipment to press the device, lubricant is applied to the outer shells of the static pressure probe rods and the static pressure cone tips that have been screwed together.

Images