Pore water pressure testing device
By designing multi-layer permeable stone structures and subdivided area separation docking rings, the problem that existing pore water pressure sensors cannot effectively prevent the entry of fine particles is solved, and higher measurement data accuracy and detection reliability are achieved.
Patent Information
- Application Number
- CN202510229941.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-05-13
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The permeable stone design single layer at the front end of the existing pore water pressure sensor cannot effectively prevent the entry of fine particulate materials, resulting in sensor blockage, measurement interruption or data deviation.
A pore water pressure testing device is designed, adopting a multi-layer permeable stone structure, including an outer permeable stone, an inner permeable stone and a secondary permeable parts. Through the complex separation of the docking ring and the combination of the clamping tip/trough, it realizes effective filtration of fine particles and accurate detection of pore water.
Effectively prevent fine particulate matter from entering, avoid sensor blockage, improve the accuracy and stability of measurement data, and enhance the reliability of pore water pressure detection.
Smart Images
Figure CN119985259A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pore water pressure testing, in particular to a pore water pressure testing device. Background Art
[0002] In the field of geotechnical engineering, pore water pressure is an extremely critical parameter, which is widely used in various construction projects, such as road and bridge construction, high-rise building construction, dam construction, and underground engineering excavation. Accurately measuring pore water pressure plays a decisive role in assessing soil stability, predicting foundation settlement, analyzing slope instability risks, and judging the impact of groundwater level changes on engineering.
[0003] The permeable stone at the front end of the current pore water pressure sensor is a single-layer design. Although it can prevent the entry of large soil particles, it cannot further prevent the entry of fine particles. The entry of these fine particles will block the contact between the pore water and the sensor, making the sensor unable to draw pressure normally, resulting in measurement interruption or large data deviation. Summary of the invention
[0004] In view of the deficiencies in the prior art, the present invention provides a pore water pressure testing device that can prevent the entry of fine particles, avoid clogging of the sensor, and improve the accuracy of the measurement data.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pore water pressure testing device, comprising a water pressure sensor, the lower end of the water pressure sensor is threadedly connected to a connecting seat, the lower end of the connecting seat is sealed and bonded to an outer layer of permeable stone, the bottom end of the outer layer of permeable stone is rotatably mounted with a lower end head, the middle part of the top end of the lower end head is mounted with an ABS shaft core, the inner side of the outer layer of permeable stone is provided with a secondary permeable component, and the permeable part of the secondary permeable component is also provided with a separation anti-silt component; The secondary water-permeable component comprises a subdivided area separation docking ring installed at the top of the lower end head and located at the outer ring of the ABS shaft core, an inner layer of water-permeable stone is installed at the top of the outer layer of water-permeable stone and located at the inner ring of the subdivided area separation docking ring, a rotation groove used in conjunction with the subdivided area separation docking ring is opened at the bottom end of the connecting seat, a rotation limit groove used in conjunction with the subdivided area separation docking ring is opened at the top of the lower end head, and a water-permeable notch area is opened on one side of the outer wall of the subdivided area separation docking ring; The separating and anti-silting components include a rebound hidden area opened at the two edges of the subdivided area separating docking ring, a rebound arm is fixedly connected to one side of the rebound hidden area, and a clamping tip is provided at the inner end of the rebound arm. The inner layer of permeable stone is evenly divided into a plurality of subdivided permeable areas, and a clamping tip groove used in conjunction with the clamping tip is opened between two adjacent subdivided permeable areas.
[0006] Preferably, a transmission cable is connected to the middle of the top of the water pressure sensor, an ABS shell is installed on the upper end of the water pressure sensor, a cable hole is opened on one side of the outer wall of the ABS shell, and the transmission cable passes outward from the cable hole.
[0007] Preferably, a plurality of concave water-permeable grooves are evenly arranged on the outer wall of the outer layer of permeable stone, and the cross-section of the concave water-permeable grooves is semicircular, which is used to increase the contact and water-permeable area between the outer layer of the permeable stone and the pore water, thereby improving the water permeability efficiency.
[0008] Preferably, the pore sizes of the multiple subdivided permeable areas are different, and the angle of the permeable gap area is the same as the angle of the subdivided permeable area. The pores of the secondary permeable area can be adjusted according to the detection needs of water quality in different areas to improve the test application range.
[0009] Preferably, the subdivided area separation docking ring is made of impermeable material to prevent pore water from directly entering from non-set areas, resulting in insufficient impurity filtration and affecting the results of pore water pressure detection.
[0010] Preferably, the subdivided area separation docking ring is adapted to the size of the rotation limit groove, which is used to limit the subdivided area separation docking ring during rotation and to quickly adjust the water permeable pores of the secondary water permeable component.
[0011] Preferably, an interlayer area is left between the outer layer of permeable stone and the subdivided area separation docking ring as a pore water storage space after one water permeation, and the two snap-in tips correspond to the positions of the two adjacent snap-in tip grooves, and the snap-in tips and the snap-in tip grooves are snap-in designs.
[0012] Preferably, the rebound arm is arc-shaped and made of elastic material. The design of the elastic material can determine whether it is adjusted into place during rotation when the snap-fit tip falls into the snap-fit tip groove through the rotational damping force transmitted by the rebound arm and the snap-fit tip.
[0013] Compared with the prior art, the present invention provides a pore water pressure testing device, which has the following beneficial effects: through the design of the concave permeable groove, the contact permeable area between the outer layer of the permeable stone and the pore water can be increased, and the permeable efficiency can be improved; through the arrangement of the secondary permeable component, the pores of the secondary permeable can be adjusted according to the detection needs of water quality in different areas, and the applicable scope of the test can be improved; secondly, by using the clamping of the clamping tip and the clamping tip groove, the sealing of the two sides is realized, and the pore water is prevented from directly entering from the outer wall of the subdivided permeable area where it is not needed; Through the setting of the rebound arm, on the one hand, whether the adjustment is in place can be determined by the rotational damping force transmitted by the rebound arm and the clamping tip; on the other hand, after the clamping tip is disengaged from the clamping tip groove, the tip of the clamping tip will fit tightly with the outer wall of the inner permeable stone, so that during the rotation process, impurities on the outer wall can be scraped off, thereby improving the cleanliness of the outer wall and not affecting the entry of pore water in subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the disassembled structure of the present invention; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the structure of the subdivided area separation docking ring in the present invention; Figure 4 For the present invention Figure 3 The enlarged schematic diagram at A in the middle; Figure 5 It is a schematic diagram of the structure of the inner layer of permeable stone in the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 7 It is a schematic diagram of a cross section of a docking ring separated by subdivided areas in the present invention; Figure 8 This is a schematic diagram of the cross section of the inner layer of permeable stone in the present invention; Fig. 9 It is a schematic diagram of the bottom structure of the connecting seat in the present invention; Fig.10 It is a structural schematic diagram of the lower end head in the present invention.
[0015] In the figure: 1, water pressure sensor; 11, transmission cable; 12, ABS housing; 13, cable hole; 14, connection seat; 15, lower end; 16, ABS shaft core; 2. Outer layer of permeable stone; 21. Inner concave permeable groove; 3. Subdivided area separation docking ring; 31. Rebound hidden area; 32. Rebound arm; 33. Snap-on tip; 34. Inner layer permeable stone; 35. Subdivided permeable area; 36. Snap-on tip groove; 37. Rotation limit groove; 38. Rotation groove. DETAILED DESCRIPTION
[0016] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.
[0017] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0019] See also Figure 1-10 , the present invention provides a technical solution of a pore water pressure testing device: Embodiment 1, a pore water pressure testing device, comprising a water pressure sensor 1, the lower end of the water pressure sensor 1 is threadedly connected to a connection seat 14, the lower end of the connection seat 14 is sealed and bonded to an outer layer of permeable stone 2, the bottom end of the outer layer of permeable stone 2 is rotatably mounted with a lower end head 15, the top middle part of the lower end head 15 is mounted with an ABS shaft core 16, the inner side of the outer layer of permeable stone 2 is provided with a secondary permeable component, and the permeable part of the secondary permeable component is also provided with a separation anti-silt component; The secondary water-permeable component includes a subdivided area separation docking ring 3 installed at the top of the lower end head 15 and located at the outer ring of the ABS shaft core 16, an inner layer of water-permeable stone 34 is installed on the top of the outer layer of water-permeable stone 2 and located at the inner ring of the subdivided area separation docking ring 3, a rotation groove 38 used in conjunction with the subdivided area separation docking ring 3 is opened at the bottom end of the connecting seat 14, a rotation limit groove 37 used in conjunction with the subdivided area separation docking ring 3 is opened at the top of the lower end head 15, and a water-permeable notch area is opened on one side of the outer wall of the subdivided area separation docking ring 3; The separation and anti-siltation components include a rebound hidden area 31 opened at the two edges of the subdivided area separation docking ring 3, a rebound arm 32 is fixedly connected to one side of the rebound hidden area 31, and a clamping tip 33 is arranged at the inner end of the rebound arm 32. The inner layer of permeable stone 34 is evenly divided into a plurality of subdivided permeable areas 35, and a clamping tip groove 36 used in conjunction with the clamping tip 33 is opened between two adjacent subdivided permeable areas 35. A transmission cable 11 is connected to the middle of the top end of the water pressure sensor 1, and an ABS shell 12 is installed at the upper end of the water pressure sensor 1. A cable hole 13 is opened on one side of the outer wall of the ABS shell 12, and the transmission cable 11 passes outward from the cable hole 13.
[0020] In the second embodiment, a plurality of concave water-permeable grooves 21 are evenly arranged on the outer wall of the outer layer of the water-permeable stone 2. The cross section of the concave water-permeable grooves 21 is semicircular, which is used to increase the contact and water-permeable area between the outer layer of the water-permeable stone and the pore water, and improve the water permeability efficiency. The pore sizes of the plurality of subdivided water-permeable areas 35 are different. The angle of the water-permeable notch area is the same as the angle of the subdivided water-permeable area 35. The pores of the secondary water permeability can be adjusted according to the detection needs of water quality in different regions, thereby improving the applicable scope of the test. According to the specific needs of production, the subdivided water-permeable areas 35 corresponding to the required number and pore size can be used. Water zone 35. At the same time, it should be noted that: how to specifically realize the judgment of pore adjustment is a commonly used technical means in this field, such as marking, which will not be specifically described in this application. The subdivided area separation docking ring 3 is made of impermeable material, which is used to prevent pore water from directly entering from non-set areas, resulting in insufficient impurity filtration and affecting the results of pore water pressure detection. The subdivided area separation docking ring 3 is adapted to the size of the rotation limit groove 37, which is used to limit the subdivided area separation docking ring 3 during rotation, and is used to quickly adjust the permeable pores of the secondary permeable component.
[0021] Embodiment 3: An interlayer area is left between the outer permeable stone 2 and the subdivided area separation docking ring 3 as a pore water storage space after the first water permeation. The two clamping tips 33 correspond to the positions of the two adjacent clamping tip grooves 36. The clamping tips 33 and the clamping tip grooves 36 are designed to be clampable. When the secondary permeable component is adjusted to the required position, the clamping of the clamping tips 33 and the clamping tip grooves 36 is used to achieve sealing on both sides to prevent pore water from directly entering the outer wall of the subdivided permeable area 35 where it is not required. The rebound arm 32 is arc-shaped and made of elastic material. The design of the elastic material can determine whether it is adjusted into place when the snap-on tip 33 falls into the snap-on tip groove 36 during the rotation process, through the rotational damping force transmitted by the rebound arm 32 and the snap-on tip 33. At the same time, due to the elastic force of the rebound arm 32, after the snap-on tip 33 is released from the snap-on tip groove 36, the tip of the snap-on tip 33 will fit tightly with the outer wall of the inner layer of permeable stone 34, so that during the rotation process, impurities on the outer wall can be scraped off, thereby improving the cleanliness of the outer wall and not affecting the entry of pore water in subsequent use.
[0022] When used specifically, the present invention is used as a pore water pressure testing device. During the use of this design, according to the water quality of the use area, by rotating the lower end head 15, the subdivided area separation docking ring 3 can be driven to rotate, and the permeable gap area can be rotated to the corresponding subdivided permeable area 35 of the required permeable pore. Then, the present design is placed at the position to be tested. The pore water will first enter the permeable gap area through the outer permeable stone 2. Due to the concave permeable groove 21 provided on the surface of the outer permeable stone 2, the increased permeable contact area is increased, thereby accelerating the increased permeability efficiency. The pore water after the first permeation is not directly transmitted to the water pressure sensor 1, but is subjected to a second permeation through the permeable gap area and the corresponding subdivided permeable area 35, and fine impurities are further filtered. The filtered pore water will contact the sensing part of the water pressure sensor 1, thereby realizing accurate detection of the pore water pressure and improving the accuracy of the detection.
[0023] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.
Claims
1. A pore water pressure testing device, comprising a water pressure sensor (1), wherein the lower end of the water pressure sensor (1) is threadedly connected to a connection seat (14), the lower end of the connection seat (14) is sealed and bonded to an outer layer of permeable stone (2), the bottom end of the outer layer of permeable stone (2) is rotatably mounted with a lower end head (15), and an ABS shaft core (16) is mounted at the middle of the top end of the lower end head (15), characterized in that: A secondary water-permeable component is arranged on the inner side of the outer layer of water-permeable stone (2), and a separation anti-siltation component is also arranged at the water-permeable part of the secondary water-permeable component; The secondary water-permeable component comprises a subdivided area separation docking ring (3) mounted on the top of the lower end head (15) and located on the outer ring of the ABS shaft core (16); an inner layer of water-permeable stone (34) is mounted on the top of the outer layer of water-permeable stone (2) and located on the inner ring of the subdivided area separation docking ring (3); a rotation groove (38) for use with the subdivided area separation docking ring (3) is provided at the bottom end of the connecting seat (14); a rotation limit groove (37) for use with the subdivided area separation docking ring (3) is provided at the top end of the lower end head (15); and a water-permeable notch area is provided on one side of the outer wall of the subdivided area separation docking ring (3); The partitioning anti-siltation component comprises a rebound hidden area (31) provided at two edges of the subdivided area partition docking ring (3); a rebound arm (32) is fixedly connected to one side of the rebound hidden area (31); a clamping tip (33) is provided at one inner end of the rebound arm (32); the inner layer of permeable stone (34) is evenly divided into a plurality of subdivided permeable areas (35); and a clamping tip groove (36) for use with the clamping tip (33) is provided between two adjacent subdivided permeable areas (35).
2. A pore water pressure testing device according to claim 1, characterized in that: A transmission cable (11) is connected to the middle of the top end of the water pressure sensor (1), an ABS housing (12) is installed at the upper end of the water pressure sensor (1), a cable hole (13) is provided on one side of the outer wall of the ABS housing (12), and the transmission cable (11) passes outward from the cable hole (13).
3. A pore water pressure testing device according to claim 1, characterized in that: A plurality of inwardly concave water-permeable grooves (21) are evenly arranged on the outer wall of the outer layer of water-permeable stone (2), and the cross section of the inwardly concave water-permeable grooves (21) is semicircular, so as to increase the contact and water-permeable area between the outer layer of the water-permeable stone and the pore water.
4. A pore water pressure testing device according to claim 1, characterized in that: The pore sizes of the plurality of subdivided water-permeable areas (35) are different, and the angle of the water-permeable notch area is the same as the angle of the subdivided water-permeable area (35).
5. A pore water pressure testing device according to claim 1, characterized in that: The subdivided area separation butt joint ring (3) is made of a water-impermeable material and is used to prevent pore water from directly entering from non-set areas.
6. A pore water pressure testing device according to claim 1, characterized in that: The subdivided area separation docking ring (3) is adapted in size to the rotation limit groove (37) and is used to limit the subdivided area separation docking ring (3) during rotation and to quickly adjust the water permeable pores of the secondary water permeable component.
7. A pore water pressure testing device according to claim 1, characterized in that: An interlayer area is left between the outer permeable stone (2) and the subdivided area separation docking ring (3) as a pore water storage space after a water permeation. The two snap-fitting tips (33) correspond to the positions of the two adjacent snap-fitting tip grooves (36). The snap-fitting tips (33) and the snap-fitting tip grooves (36) are snap-fittable.
8. A pore water pressure testing device according to claim 1, characterized in that: The rebound arm (32) is arc-shaped and made of an elastic material. The elastic material is designed so that when the clamping tip (33) falls into the clamping tip groove (36) during the rotation process, the rotation damping force transmitted by the rebound arm (32) and the clamping tip (33) can be used to determine whether the clamping tip is adjusted in place. At the same time, due to the elastic force of the rebound arm (32), after the clamping tip (33) is released from the clamping tip groove (36), the tip of the clamping tip (33) will be tightly fitted with the outer wall of the inner permeable stone (34).