A simple device for quickly burying a pore water pressure gauge to a target depth

Abstract

The application relates to a simple device capable of quickly burying a pore water pressure gauge to a target depth, which comprises an extension rod and a guide rod for mounting the pore water pressure gauge, one end of the guide rod is provided with a clamping structure for clamping the pore water pressure gauge and capable of automatically releasing, one end of the extension rod is detachably connected with the end of the guide rod away from the clamping structure, the extension rod is provided in multiple, the axes of the multiple extension rods are the same straight line and are arranged, the adjacent extension rods are detachably connected, and the extension rod is provided with a scale line. The clamping structure at the end of the guide rod can automatically release the pore water pressure gauge, the pore water pressure gauge can be conveniently and quickly clamped and released, the extension rod is detachably connected with the guide rod and the multiple extension rods are also detachably connected, the device length can be flexibly combined according to different target depths, the scale line on the extension rod can accurately determine the burying depth, and the speed and accuracy of burying the pore water pressure gauge to the target depth are improved.

Description

Technical Field

[0001] This application relates to the field of instrument installation auxiliary tools, and in particular to a simple device that can quickly install a pore water pressure gauge to a target depth. Background Technology

[0002] In geotechnical engineering and related fields, the measurement of pore water pressure is of paramount importance for studying soil stability and foundation settlement. As a key instrument for measuring pore pressure in soil or water layers, the accurate installation of pore water pressure gauges directly affects the reliability and validity of the measurement results. With the continuous development of engineering construction, the requirements for the accuracy and efficiency of pore water pressure measurement are becoming increasingly stringent. How to better complete the installation of pore water pressure gauges has become a focus of attention in the industry. This not only relates to the quality of engineering monitoring data but also has a profound impact on the safety assessment and subsequent decision-making of the entire project.

[0003] Currently, borehole installation is the commonly used method for installing pore water pressure gauges. This method typically involves drilling a hole to the design depth or a certain distance above the elevation, cleaning the hole, backfilling with a certain height of coarse sand, then placing the pore water pressure gauge, which has been saturated with water for a period of time, at the design elevation, extending the gauge's cable, continuing to backfill with coarse sand, and finally sealing the hole with bentonite or clay balls to ensure a tight seal. In practice, construction workers usually rely on experience and some simple measuring tools to determine the drilling depth and the height of the permeable material backfill. For example, they may use a traditional ruler for approximate measurement, but this method is easily affected by human factors and environmental conditions, leading to inaccurate measurement results. Furthermore, the lack of effective guidance and positioning methods when placing the pore water pressure gauge into the borehole makes it difficult to ensure that it accurately reaches the design elevation.

[0004] However, in areas with high groundwater levels, such as Shanghai, boreholes are often filled with groundwater. In such cases, existing installation methods struggle to ensure both adequate permeability around the pore water pressure gauge and accurate placement at the design elevation. Traditional methods cannot precisely control borehole depth and permeable material backfill height, leading to inaccurate placement of the pore water pressure gauge and consequently affecting the accuracy and reliability of pore water pressure measurements. Utility Model Content

[0005] To address the problem of burying pore water pressure gauges in the prior art, this application provides a simple device that can quickly bury pore water pressure gauges to the target depth.

[0006] This application provides a simple device for quickly burying a pore water pressure gauge to a target depth, which adopts the following technical solution:

[0007] A simple device for quickly embedding a pore water pressure gauge to a target depth includes an extension rod and a guide rod for mounting the pore water pressure gauge. One end of the guide rod is provided with a clamping structure for holding the pore water pressure gauge and capable of automatic release. One end of the extension rod is detachably connected to the end of the guide rod away from the clamping structure. Multiple extension rods are provided, and the axes of the multiple extension rods are all on the same straight line and arranged in an orderly manner. Adjacent extension rods are detachably connected, and each extension rod is provided with a scale line.

[0008] By adopting the above technical solution, the pore water pressure gauge can be conveniently and quickly clamped and released using the clamping structure at the end of the guide rod. The extension rod is detachably connected to the guide rod, and multiple extension rods can also be detachably connected, facilitating flexible combination of device lengths according to different target depths. The extension rod is equipped with scale lines, which can accurately determine the burial depth, improve the speed and accuracy of burying the pore water pressure gauge to the target depth, and avoid the problem of inaccurate measurement results caused by human factors and environmental interference.

[0009] Preferably, the end of the guide rod away from the clamping structure is provided with a first threaded interface, one end of each of the plurality of extension rods is provided with a second threaded interface, and the other end of each of the plurality of extension rods is provided with a threaded structure that forms a threaded connection with the first threaded interface and the second threaded interface.

[0010] By adopting the above technical solution, the first threaded interface, the second threaded interface, and the threaded structure enable detachable threaded connections between the guide rod, the extension rod, and adjacent extension rods. This facilitates the assembly and disassembly of the device, makes it easy to carry and use, and allows for rapid assembly of the device to bury the pore water pressure gauge to the target depth. At the same time, multiple extension rods are provided and their lengths can be flexibly adjusted through threaded connections to adapt to different depth requirements.

[0011] Preferably, both the guide rod and the extension rod are hollow designs.

[0012] By adopting the above technical solutions, the hollow design of the guide rod and extension rod can reduce the weight of the device and facilitate operation; at the same time, it facilitates the passage and arrangement of the pore water pressure gauge cable, improving installation convenience.

[0013] Preferably, the clamping structure includes a clamping rod disposed at the end of the guide rod, and multiple clamping rods are provided. The middle part of any one of the clamping rods is rotatably connected to the end of the guide rod, and the rotation axis of any one of the clamping rods is perpendicular to the axis of the guide rod. The multiple clamping rods are arranged in a circumferential array, and the end of the multiple clamping rods away from the guide rod forms a clamping space for clamping a pore water pressure gauge. The end of the guide rod is also provided with a pushing element for pushing the end of the clamping rod away from the clamping space to move radially.

[0014] By adopting the above technical solution, the pore water pressure gauge can be stably clamped by the clamping space formed by multiple circumferential arrays of clamping rods rotatably connected to the end of the guide rod. The clamping rod is then used to move the end of the clamping rod away from the clamping space radially by a pushing element, thereby clamping the pore water pressure gauge. This facilitates the rapid and accurate installation and placement of the pore water pressure gauge.

[0015] Preferably, the pushing element is slidably disposed within the guide rod along the axial direction, and the side of the pushing element forms an abutment fit with the end of the clamping rod away from the clamping space.

[0016] By adopting the above technical solution, the axial sliding of the pushing element in the guide rod can be used to abut against the end of the clamping rod away from the clamping space, thereby pushing the clamping rod and enabling the clamping structure to easily clamp and release the pore water pressure gauge.

[0017] Preferably, the pushing element has a wedge-shaped abutment portion for pushing the clamping rotation, and the end of the clamping rod away from the clamping space forms an abutment engagement with the wedge-shaped abutment portion. The pushing element also has a retaining abutment portion for maintaining the position of the clamping rod. The wedge-shaped abutment portion is located at the end of the pushing element close to the clamping space, and the retaining abutment portion is located at the end of the pushing element away from the clamping space.

[0018] By adopting the above technical solution, the wedge-shaped abutment part on the pushing element engages with the clamping rod, which drives the clamping rod to rotate and clamp the pore water pressure gauge. The retaining abutment part maintains the position of the clamping rod. Combined with features including an extension rod and guide rod, a clamping structure at the end of the guide rod, graduation lines on the extension rod, a hollow design for the guide rod and extension rod, and a circumferential array of clamping rods, this method enables rapid and accurate burial of the pore water pressure gauge to the target depth, ensuring reliable clamping and smooth release of the pore water pressure gauge during burial.

[0019] Preferably, a sliding rod is also fixedly provided on the pushing element. The sliding rod is arranged perpendicular to the axis of the guide rod and passes through the guide rod to form a sliding engagement with the guide rod.

[0020] By adopting the above technical solution, the sliding rod, which is fixed on the pushing element and forms a sliding fit with the guide rod, allows the operator to control the sliding of the pushing element in the guide rod from the outside, thereby making it easier to control the opening and closing of the clamping rod and realize the clamping and releasing of the pore water pressure gauge.

[0021] Preferably, the sliding rod is foldable.

[0022] By adopting the above technical solution, the sliding rod can be folded for easy storage and carrying of the device, reducing the space occupied.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The scale lines on multiple extension rods can avoid interference from human factors and environmental conditions, enabling construction personnel to more accurately control the drilling depth and the backfill height of the permeable material, and improve the accuracy of measurement results;

[0025] 2. The guide rod is equipped with an automatically releasing clamping structure, which makes it easy to accurately place the pore water pressure gauge at the design elevation, avoids deviations during placement, and improves the installation accuracy of the pore water pressure gauge;

[0026] 3. It solves the problem of accurately burying the pore water pressure gauge at the design elevation while ensuring the permeability around it when the groundwater level is high and the borehole is filled with groundwater, thus improving the accuracy and reliability of pore water pressure measurement. Attached Figure Description

[0027] Figure 1 This is an isometric schematic diagram of the main overall structure in the embodiments of this application;

[0028] Figure 2 This is a schematic diagram of the structure of the guide rod and extension rod in the embodiments of this application;

[0029] Figure 3 This is a cross-sectional view of the overall structure in the embodiments of this application;

[0030] Figure 4 This is a schematic diagram of the clamping structure in an embodiment of this application.

[0031] Reference numerals: 1. Extension rod; 2. Guide rod; 3. Clamping structure; 31. Clamping rod; 32. Pushing element; 321. Wedge-shaped abutment part; 322. Holding abutment part; 4. First threaded interface; 5. Second threaded interface; 6. Threaded structure; 7. Scale line; 8. Clamping space; 9. Sliding rod. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail.

[0033] This application discloses a simple device that can quickly bury a pore water pressure gauge to a target depth.

[0034] Reference Figure 1 and Figure 2A simple device for quickly burying a pore water pressure gauge to a target depth includes an extension rod 1 and a guide rod 2 for installing the pore water pressure gauge. One end of the guide rod 2 is provided with a clamping structure 3 for holding the pore water pressure gauge and automatically releasing it. One end of the extension rod 1 is detachably connected to the end of the guide rod 2 away from the clamping structure 3. Multiple extension rods 1 are provided, and the axes of the multiple extension rods 1 are all on the same straight line and arranged in an orderly manner. Adjacent extension rods 1 are detachably connected to each other, which facilitates flexible adjustment of the length of the device according to different drilling depths.

[0035] Reference Figure 2 and Figure 3 The guide rod 2, at its end furthest from the clamping structure 3, has a first threaded interface 4 for connection to the extension rod 1. Each extension rod 1 has a second threaded interface 5 and a threaded structure 6 at both ends. The second threaded interface 5 is located at one end of the extension rod 1, and the threaded structure 6 is located at the other end. The threaded structure 6 can form a threaded connection with the first threaded interface 4 and the second threaded interface 5. Through this threaded connection method, multiple extension rods 1 can be connected sequentially, ensuring that the axes of the connected rods are on the same straight line.

[0036] Reference Figure 1 and Figure 2 Each extension rod 1 is equipped with a scale line 7, which can accurately read the depth of the device inserted into the borehole, thereby ensuring that the pore water pressure gauge can accurately reach the design elevation and avoid the problem of installation position deviation caused by inaccurate measurement.

[0037] Reference Figure 2 and Figure 3 Both guide rod 2 and extension rod 1 are hollow. This hollow design reduces the overall weight of the device, facilitating operation; furthermore, it provides a passage for the cable of the pore water pressure gauge, allowing the cable to pass through and preventing damage during installation. The hollow portions of guide rod 2 and extension rod 1 are generally circular.

[0038] Reference Figure 3 and Figure 4 The clamping structure 3 can firmly clamp the pore water pressure gauge, facilitating its transport to the target location and automatically releasing it. The clamping structure 3 includes clamping rods 31 and pushing elements 32. Multiple clamping rods 31 are provided; in this embodiment, four clamping rods 31 are provided. The middle of any clamping rod 31 is rotatably connected to the end of the guide rod 2. The rotation axis of any clamping rod 31 is perpendicular to the axis of the guide rod 2. The multiple clamping rods 31 are arranged in a circumferential array, and the ends of the multiple clamping rods 31 away from the guide rod 2 form a clamping space 8 for clamping the pore water pressure gauge. The clamping rods 31 are typically made of a metal material with good elasticity, and their middle parts are rotatably connected to the end of the guide rod 2 by means of pins or other methods.

[0039] Reference Figure 3 and Figure 4 The pushing element 32 is slidably disposed within the guide rod 2 along the axial direction of the guide rod 2. Its side surface forms an abutment with the end of the clamping rod 31 away from the clamping space 8, and is used to push the end of the clamping rod 31 away from the clamping space 8 to move radially outward along the guide rod 2. The end of the pushing element 32 near the clamping space 8 is configured as a frustum, and the end of the pushing element 32 away from the clamping space 8 is configured as a cylinder. The generatrix of the frustum-shaped side surface of the pushing element 32 forms a wedge-shaped abutment portion 321 for pushing the clamping rod 31 to rotate, and the cylindrical side surface of the pushing element 32 forms a retaining abutment portion 322 for retaining the position of the clamping rod 31.

[0040] Reference Figure 3 and Figure 4 When the pushing element 32 moves toward the clamping space 8, the wedge-shaped abutment part 321 pushes the end of the clamping rod 31 away from the clamping space 8 to move radially toward the guide rod 2. According to the lever principle, this reduces the clamping space 8 at the other end of the clamping rod 31. The holding abutment part 322 is located at the end of the pushing element 32 away from the clamping space 8. When the pushing element 32 moves to the appropriate position, the end of the clamping rod 31 away from the clamping space 8 forms an abutment fit with the holding abutment part 322. The holding abutment part 322 can keep the clamping rod 31 in the current position. At this time, the pore water pressure gauge is clamped and the tail tube of the pore water pressure gauge forms an abutment fit with the pushing element 32 in the axial direction of the guide rod 2.

[0041] Reference Figure 3 and Figure 4 When the pore water pressure gauge is buried in the borehole and the height is determined to be appropriate by the scale line 7, the operator applies pressure to the simple device into the borehole. Since the tail tube of the pore water pressure gauge and the pushing element 32 form an abutting fit, after the pressure is applied, the pore water pressure gauge abuts against the bottom of the borehole. The clamping rod 31 and the clamping position of the pore water pressure gauge move downward. The tail tube of the pore water pressure gauge pushes the pushing element 32 to slide along the axis of the guide rod 2 away from the clamping space 8. The abutting position of the end of the clamping rod 31 away from the clamping space 8 and the pushing element 32 will move from the holding abutting part 322 to the wedge-shaped abutting part 321. At this time, the end of the clamping rod 31 away from the clamping space 8 moves radially inward along the guide rod 2. According to the lever principle, the end of the clamping rod 31 close to the clamping space 8 moves radially outward along the guide rod 2. At this time, the clamping space 8 becomes larger, and the clamping structure 3 automatically releases the pore water pressure gauge.

[0042] Reference Figure 3 and Figure 4A sliding rod 9 is also fixedly mounted on the pushing element 32. The sliding rod 9 is perpendicular to the axis of the guide rod 2 and passes through the guide rod 2, forming a sliding engagement with it. This sliding engagement ensures that the pushing element 32 can slide stably within the guide rod 2. The operator can control the sliding of the pushing element 32 within the guide rod 2 by pushing the sliding rod 9, thereby achieving the rotation of the clamping rod 31 and the loosening or tightening of the pore water pressure gauge. The sliding rod 9 can be made of metal rod material and can be folded for ease of operation. For example, when not in use, the sliding rod 9 can be folded up to reduce space occupation; when needed, it can be unfolded.

[0043] The implementation principle of this embodiment is as follows: In actual use, the pore water pressure gauge is first placed in the clamping space 8 of the clamping structure 3, and the clamping rod 31 is clamped by adjusting the pushing element 32. Then, an appropriate number of extension rods 1 are selected according to the drilling depth, and the extension rods 1 and guide rods 2 are connected in sequence by threaded connection. The device is then slowly lowered into the borehole, and the scale line 7 on the extension rod 1 is used to determine the target depth reached by the pore water pressure gauge. After reaching the target depth, the simple device is pushed into the borehole to move the pushing element 32, thereby allowing the clamping rod 31 to release the pore water pressure gauge, completing the installation work. This device solves the problems of difficulty in accurately controlling the installation depth and lack of effective guidance and positioning methods in areas with high groundwater levels in the prior art, improves the accuracy and efficiency of pore water pressure gauge installation, and thus improves the reliability of pore water pressure measurement, providing more accurate data support for safety assessment and decision-making in geotechnical engineering.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A simple device for quickly burying a pore water pressure gauge to a target depth, characterized in that: It includes an extension rod (1) and a guide rod (2) for mounting a pore water pressure gauge. One end of the guide rod (2) is provided with a clamping structure (3) for clamping the pore water pressure gauge and being able to automatically release it. One end of the extension rod (1) is detachably connected to the end of the guide rod (2) away from the clamping structure (3). There are multiple extension rods (1), and the axes of the multiple extension rods (1) are all on the same straight line and arranged in a row. Adjacent extension rods (1) are detachably connected. Each extension rod (1) is provided with a scale line (7).

2. The simple device for quickly burying a pore water pressure gauge to a target depth according to claim 1, characterized in that: The guide rod (2) is provided with a first threaded interface (4) at one end away from the clamping structure (3), and each of the multiple extension rods (1) is provided with a second threaded interface (5) at one end. The other end of each of the multiple extension rods (1) is provided with a threaded structure (6) that forms a threaded connection with the first threaded interface (4) and the second threaded interface (5).

3. The simple device for quickly burying a pore water pressure gauge to a target depth according to claim 1, characterized in that: Both the guide rod (2) and the extension rod (1) are hollow.

4. A simple device for quickly burying a pore water pressure gauge to a target depth according to claim 3, characterized in that: The clamping structure (3) includes a clamping rod (31) disposed at the end of the guide rod (2). Multiple clamping rods (31) are provided. The middle part of any clamping rod (31) is rotatably connected to the end of the guide rod (2). The rotation axis of any clamping rod (31) is perpendicular to the axis of the guide rod (2). Multiple clamping rods (31) are arranged in a circumferential array. The end of the multiple clamping rods (31) away from the guide rod (2) forms a clamping space (8) for clamping a pore water pressure gauge. The end of the guide rod (2) is also provided with a pushing element (32) for pushing the end of the clamping rod (31) away from the clamping space (8) to move radially.

5. A simple device for quickly burying a pore water pressure gauge to a target depth according to claim 4, characterized in that: The pushing element (32) is slidably disposed in the guide rod (2) along the axial direction, and the side of the pushing element (32) forms an abutment fit with the end of the clamping rod (31) away from the clamping space (8).

6. A simple device for quickly burying a pore water pressure gauge to a target depth according to claim 5, characterized in that: The pushing element (32) has a wedge-shaped abutment (321) for pushing the clamping rotation. The end of the clamping rod (31) away from the clamping space (8) forms an abutment with the wedge-shaped abutment (321). The pushing element (32) also has a holding abutment (322) for holding the position of the clamping rod (31). The wedge-shaped abutment (321) is located at the end of the pushing element (32) close to the clamping space (8), and the holding abutment (322) is located at the end of the pushing element (32) away from the clamping space (8).

7. A simple device for quickly burying a pore water pressure gauge to a target depth according to claim 6, characterized in that: A sliding rod (9) is also fixedly provided on the pushing element (32). The sliding rod (9) is arranged perpendicular to the axis of the guide rod (2) and passes through the guide rod (2) and forms a sliding fit with the guide rod (2).

8. A simple device for quickly burying a pore water pressure gauge to a target depth according to claim 7, characterized in that: The sliding rod (9) is foldable.

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