A corrosion-resistant earth pressure gauge mounting structure and its installation method

Abstract

The present invention discloses a corrosion-resistant earth pressure gauge installation structure and an installation method thereof. The installation structure comprises a disc-shaped elastic sleeve, wherein the elastic sleeve has a liquid storage cavity, and an inner cavity is provided on the outer wall of the elastic sleeve away from the liquid storage cavity, wherein the inner cavity is used to accommodate the earth pressure gauge; a fixing device is provided on the elastic sleeve, and the fixing device is used to fix the elastic sleeve equipped with the earth pressure gauge at a predetermined position. The installation method of the present invention comprises the following steps: S1 pre-preparation, S2 on-site installation, and S3 data monitoring and adjustment. The corrosion-resistant earth pressure gauge installation structure of the present invention significantly improves the installation quality of the earth pressure gauge by installing an elastic sleeve on the outside of the earth pressure gauge and adopting a copper-wrapped side and water-filled design. The installation quality is convenient for disassembly and assembly, and the installation is convenient for carrying. The corrosion resistance performance can be improved, and the accuracy of the detection results can be ensured. The installation method of the corrosion-resistant earth pressure gauge of the present invention is simple and economical, so that it has a wide range of promotion value in practical applications.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering safety monitoring, and in particular to a corrosion-resistant earth pressure gauge installation structure and an installation method thereof. Background Art

[0002] In my country, the field of geotechnical engineering covers a wide range of applications and research, including foundation engineering, underground engineering, slope engineering, tunnel engineering, etc. The safety and stability of these projects are crucial to the country's infrastructure construction and people's production and life. In these projects, stress detection and monitoring are key links to ensure the safe operation of the project. With the continuous advancement of the construction of smart ports and smart waterways in my country, the demand for the accuracy and measurement capabilities of monitoring sensors is increasing, which makes the traditional manual measurement method face the challenge of not being able to meet the high-precision and high-efficiency requirements of the future. Therefore, conducting research on the automated measurement system of monitoring sensors is of great significance to improving the level of geotechnical engineering monitoring technology in my country.

[0003] As a commonly used monitoring sensor, earth pressure gauge is used to measure the earth pressure inside the soil and is an important tool to ensure the safety of geotechnical engineering. According to its working principle, earth pressure gauges are mainly divided into vibrating string type, optical fiber type, resistance type and other types. Among them, the vibrating string earth pressure gauge has been widely used in the measurement of soil pressure in foundations, foundation pits, slopes, bridges and tunnels in the transportation industry due to its advantages of low transmission loss, good stability, simple structure and low price.

[0004] Ideally, when the earth pressure gauge is buried in the soil, the pressure plate should be in close contact with the soil to ensure that the pressure cell can accurately monitor the pressure changes acting on the plate.

[0005] However, in the actual construction process, it is found that the data measured by the pressure box buried in the soil often deviates, or even does not increase with the increase of external pressure. This phenomenon poses a potential threat to the safety of the project.

[0006] The reason is that the soil stress is not concentrated, and the earth pressure gauge cannot evenly sense the pressure from the soil. This will cause a deviation between the earth pressure gauge reading and the actual soil pressure. Especially when the earth pressure gauge is not in close contact with the soil or there is a gap, the problem of stress concentration will be more obvious because the pressure cannot be effectively transmitted to the earth pressure gauge.

[0007] In addition, the earth pressure gauge is not properly fixed during installation, causing it to move or tilt in the soil, which will also affect its measurement accuracy. In addition, the various components of traditional earth pressure gauges are mostly integrated structures, which are not convenient for transportation or on-site disassembly and assembly.

[0008] In addition, when the earth pressure gauge is buried in the acidic soil layer for a long time, it is easily damaged by external corrosion, which affects the accuracy of the detection.

[0009] In order to solve the above problems, the present invention provides a vibrating-wire earth pressure gauge installation structure and an installation method thereof, thereby effectively solving the problems of gaps between the earth pressure gauge and the soil, non-concentrated stress, and difficulty in installation and fixing when installing the earth pressure gauge, ensuring the accuracy of the monitoring data, and making it easy to disassemble and assemble and carry. Summary of the invention

[0010] In order to solve the technical problems raised in the above background technology, the present invention provides a corrosion-resistant earth pressure gauge installation structure and an installation method thereof.

[0011] The present invention is implemented by the following technical scheme: a corrosion-resistant earth pressure gauge installation structure, including a disc-shaped elastic sleeve, wherein the elastic sleeve has a liquid storage cavity, and an inner cavity is opened on the outer wall of the elastic sleeve away from the liquid storage cavity, and the inner cavity is used to accommodate the earth pressure gauge; a fixing device is arranged on the elastic sleeve, and the fixing device is used to fix the elastic sleeve equipped with the earth pressure gauge at a predetermined position.

[0012] As a further improvement of the above solution, the pressure plate of the earth pressure gauge is tightly connected to the mounting surface of the inner cavity.

[0013] As a further improvement of the above solution, the pressure plate of the earth pressure gauge is bonded to the mounting surface of the inner cavity by glue.

[0014] As a further improvement of the above-mentioned scheme, the fixing device includes a copper surface layer arranged around the outer peripheral side of the elastic sleeve, and two radially extending connecting rods are relatively arranged on the outer peripheral side of the copper surface layer. A docking ring is rotatably provided at one end of the connecting rod away from the copper surface layer, and the docking ring can be used for adapting and plugging the steel bars used for positioning.

[0015] As a further improvement of the above scheme, the copper surface layer includes two semi-circular semi-ring bodies, and the outer sides of both ends of the semi-ring bodies are provided with docking rods. When the two semi-ring bodies are mutually embraced to form the copper surface layer, two adjacent docking rods are combined to form an insert block.

[0016] A first cylinder is arranged between the connecting rod and the copper surface layer. A first slot for plugging and matching with the plug block is provided at one end of the first cylinder, and a second slot for plugging and matching with the connecting rod is provided at the other end.

[0017] As a further improvement of the above scheme, a screw rod is rotatably arranged inside the first cylinder, and two movable arms are threadedly sleeved on both sides of the axial direction of the outer wall of the screw rod, a telescopic rod is arranged between the two movable arms, and clamping rods are arranged on opposite sides of the two movable arms, and a clamping hole matching the clamping rod is opened on the docking rod.

[0018] As a further improvement of the above solution, the threads distributed on both sides of the axial outer wall of the screw rod have opposite rotation directions.

[0019] As a further improvement of the above scheme, a second cylinder is rotatably arranged in the first cylinder, a first bevel tooth is arranged at one end of the second cylinder, a second bevel tooth matching with the first bevel tooth is fixedly sleeved on the outer side of the screw rod, a pressure rod is inserted into the end of the second cylinder away from the first bevel tooth, the pressure rod can move axially relative to the second cylinder, and the end of the pressure rod away from the first bevel tooth extends into the second slot to contact and press fit with the connecting rod; a spiral groove is axially opened on the inner wall of the second cylinder, and a protrusion is provided on the outer wall of the pressure rod to slide and engage with the groove.

[0020] The present invention also provides a method for installing a corrosion-resistant earth pressure gauge using any of the above-mentioned installation structures, comprising the following steps:

[0021] S1. Pre-preparation:

[0022] S11. Component preparation: prepare the required earth pressure gauge and the elastic sleeve of the matching size indoors; check the integrity of the earth pressure gauge to ensure that it has no physical damage or electronic failure;

[0023] S12. Assemble the components. Slowly insert the earth pressure gauge into the inner cavity of the elastic sleeve. Apply glue to stick the pressure gauge to the inner cavity and ensure that it fits completely. Adjust the position before the glue dries to ensure that the pressure plate of the earth pressure gauge can accurately contact the inner wall of the elastic sleeve. After the glue dries, check the integrity and firmness of the components to ensure that there is no looseness or displacement.

[0024] S2. On-site installation:

[0025] S21, the installation position is determined. After arriving at the site, the specific installation position and burial depth of the earth pressure gauge 2 are determined according to the design drawings and engineering requirements; the installation position is determined using measuring tools to ensure that the installation of the earth pressure gauge 2 does not deviate from the predetermined position;

[0026] S22, steel bar preparation and fixture installation, select steel bars of appropriate length, adjust the length of steel bars according to the monitoring depth, rotate the docking ring to a suitable angle, insert the steel bars into the docking ring, and ensure that it is firmly connected to the elastic sleeve; slowly send the elastic sleeve to the specified depth through the pre-excavated hole to ensure that the earth pressure gauge reaches the target position smoothly;

[0027] S23. Backfill the external soil. Continue to backfill the external soil to the ground and compact it to ensure the stability of the overall structure, ensure the uniformity and density of the backfill soil layer, and avoid affecting the measurement accuracy of the earth pressure gauge due to uneven backfill.

[0028] As a further improvement of the above scheme, the following steps are also included:

[0029] S3. Data monitoring and adjustment:

[0030] S31, initial data collection, after installation, immediately start monitoring the output data of the earth pressure gauge, collect data once every hour, and record the pressure changes;

[0031] S32, stability check. In the initial data collection stage, focus on the output stability of the sensor. If the data is stable and there is no large fluctuation, it means that the earth pressure gauge is installed successfully. If there is abnormal data or large fluctuation, check in time and eliminate the fault.

[0032] S33. Continuous monitoring and maintenance. During the continuous monitoring phase after installation, data should be collected and recorded regularly to ensure the normal operation of the earth pressure gauge.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The corrosion-resistant earth pressure gauge installation structure of the present invention significantly improves the installation quality and measurement accuracy of the earth pressure gauge by installing an elastic sleeve on the outside of the earth pressure gauge and adopting a copper-wrapped side and water-filled design. The anti-rust paint layer coated on the outside of the earth pressure gauge can improve the anti-corrosion performance and ensure the accuracy of the test results.

[0035] The corrosion-resistant earth pressure gauge installation structure of the present invention, by configuring the copper surface layer into two semi-rings and adding components such as docking rods, can realize convenient carrying of the components of the earth pressure gauge after dismantling, while improving the on-site assembly efficiency of the earth pressure gauge, that is, the stability after assembly, and having a single sequence to avoid incorrect installation.

[0036] The corrosion-resistant earth pressure gauge installation structure of the present invention can adapt to the positioning installation of positioning steel bars with different spacings at a predetermined position on site by adding a first transmission rod, a second transmission rod, a connecting block and other structures, and can achieve mutual locking between the connecting rod and the first cylinder.

[0037] The corrosion-resistant soil pressure gauge installation structure of the present invention can lock the position of the first transmission rod after it is pulled out from the connecting rod by adding a worm, a third bevel gear, a fourth bevel gear, a third cylinder, etc., so as to stably maintain the corresponding pull-out length.

[0038] The corrosion-resistant earth pressure gauge installation structure of the present invention, which is composed of two clamping rings and a worm gear arranged in cooperation with the docking ring, can conveniently and efficiently complete the installation of the earth pressure gauge on site after the positioning steel bars have been pre-inserted on site.

[0039] The installation method of the corrosion-resistant earth pressure gauge of the present invention is simple and economical, so that it has wide promotion value in practical applications.

[0040] The corrosion-resistant earth pressure gauge installation structure and installation method of the present invention ensure the measurement accuracy and installation quality of the earth pressure gauge, and effectively improve the reliability of engineering monitoring through the use of elastic sleeves and scientific installation steps. The data stability and accuracy of the earth pressure gauge after installation provide a strong guarantee for engineering safety and ensure the long-term stability and safe operation of geotechnical engineering.

[0041] In addition, compared with the prior art, the present invention achieves significant improvements and enhancements in the following aspects:

[0042] (1) Good resilience of the elastic sleeve: A disc-shaped elastic sleeve made of polyurethane material is installed on the outside of the earth pressure gauge. The polyurethane material has good flexibility and elasticity, and can quickly return to its original shape under pressure, ensuring close contact between the earth pressure gauge and the soil. This design not only improves the accuracy of the measurement, but also enhances the overall stability of the system. The elastic sleeve can rebound freely, effectively filling the gap between the soil and the earth pressure gauge, ensuring that the external pressure can be accurately transmitted to the pressure plate.

[0043] (2) Anti-lateral slip design: The side of the elastic sleeve is wrapped with copper and connected to the fixing device. The copper-wrapped design increases the strength and durability of the structure. At the same time, the fixing device can effectively prevent the earth pressure gauge from obvious lateral slip after installation, thereby improving the installation quality and stability.

[0044] (3) Stress dispersion function: The main body of the elastic sleeve is filled with water. This design enables the elastic sleeve to disperse stress when subjected to external force, greatly reducing the stress concentration phenomenon and allowing the force of the soil to be evenly transmitted to the earth pressure gauge, ensuring accurate measurement.

[0045] (4) Simple construction and economical: The present invention does not require additional equipment during the installation process, and there is no risk of damaging the instrument. The construction is simple and time-saving. The design is highly applicable and has good economical efficiency. It is an efficient and economical solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of a top view of the mounting structure provided in Embodiment 1 of the present invention;

[0047] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the installation structure;

[0048] Figure 3 for Figure 1 The device force analysis diagram when the stress of the installation structure is not concentrated;

[0049] Figure 4 A schematic diagram of a top view of the mounting structure provided in Embodiment 2 of the present invention;

[0050] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the installation structure;

[0051] Figure 6 for Figure 4 A schematic diagram of a partial cross-sectional structure of the first cylinder;

[0052] Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure of the second cylinder;

[0053] Figure 8 A schematic diagram of a top view of the mounting structure provided in Embodiment 3 of the present invention;

[0054] Fig. 9 for Figure 8 A schematic cross-sectional view of the middle connecting rod, the first cylinder, and the connecting block in an assembled and locked state, with the clamp rings in a closed state;

[0055] Fig.10 for Fig. 9 The enlarged structural diagram at A in the middle;

[0056] Fig.11 for Fig. 9 A schematic diagram of the cross-sectional structure of the middle connecting rod, the first cylinder, and the connecting block in an assembled and unlocked state, with the clamp ring in an expanded state;

[0057] Fig.12 for Fig.11 The enlarged structural diagram at B in the middle;

[0058] Fig.13 This is a flowchart of the installation method provided in Example 4 of the present invention.

[0059] Description of main symbols:

[0060] 1. elastic sleeve; 101. liquid storage chamber; 102. inner chamber; 2. soil pressure gauge; 3. fixing device; 301. connecting rod; 302. docking ring; 3021. clamping ring; 303. copper surface layer; 304. docking rod; 305. first cylinder; 306. first slot; 307. second slot; 308. second cylinder; 309. pressure rod; 310. groove; 311. convex block; 312. first bevel gear; 313. screw rod; 314. second bevel gear; 315. moving arm; 316 , telescopic rod; 317, clamping rod; 318, clamping hole; 4, connecting block; 5, first transmission rod; 6, second transmission rod; 7, synchronous plate; 8, first push rod; 9, support arm; 10, first plug rod; 11, inclined groove; 12, first plug hole; 13, slide groove; 14, worm wheel; 15, worm; 16, third bevel gear; 17, third cylinder; 18, fourth bevel gear; 19, third transmission rod; 20, fixed plate; 21, push block; 22, second plug rod; 23, inclined block; 24, second plug hole. DETAILED DESCRIPTION

[0061] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0062] Example 1

[0063] Please combine Figures 1 to 3 The corrosion-resistant earth pressure gauge installation structure includes a disc-shaped elastic sleeve 1, which has a liquid storage cavity 101. An inner cavity 102 is opened on the outer wall of the elastic sleeve 1 away from the liquid storage cavity 101, and the inner cavity 102 is used to accommodate the earth pressure gauge 2; a fixing device 3 is provided on the elastic sleeve 1, and the fixing device 3 is used to fix the elastic sleeve 1 with the earth pressure gauge 2 at a predetermined position.

[0064] The elastic sleeve 1 is in the shape of a disc and can be made of polyurethane material. The polyurethane material has good flexibility and elasticity and can quickly restore its original shape under pressure to ensure close contact between the earth pressure gauge and the soil.

[0065] By utilizing the good elastic properties of the elastic sleeve 1, when a gap appears between the entire installation structure and the soil, the elastic sleeve can rebound freely, thereby effectively filling the gap between the two and ensuring that the external pressure can be accurately transmitted to the pressure plate.

[0066] In this embodiment, the liquid storage chamber 101 contains water. The water in the liquid storage chamber 101 can disperse stress when the structure is subjected to external force, greatly reduce stress concentration, and evenly transmit the force of the soil to the soil pressure gauge 2, thereby ensuring the accuracy of the measurement.

[0067] Among them, the outer side of the soil pressure gauge is coated with an anti-rust coating layer. The anti-rust coating layer is a WC ceramic reinforced nickel-based composite coating. WC (tungsten carbide) ceramic reinforced nickel-based composite coating is a carbide ceramic material with high melting point and high hardness. It has good wettability with nickel-based alloys and is an ideal ceramic additive phase material. WC ceramic particles are added to the nickel-based alloy powder to strengthen the phase, and a metal-based ceramic composite coating is made by laser cladding. It can combine the toughness and good processability of the metal with the wear resistance, corrosion resistance, high temperature resistance and oxidation resistance of the ceramic material, and has potential application prospects. Therefore, the above-mentioned anti-rust coating layer is a lead-free and chromium-free anti-rust pigment, which can effectively improve the corrosion resistance of the soil pressure gauge in acidic soil and ensure the accuracy of the test results.

[0068] The pressure plate of the earth pressure gauge 2 is tightly connected to the mounting surface of the inner cavity 102 , that is, the pressure plate of the earth pressure gauge 2 is bonded to the mounting surface of the inner cavity 102 by glue.

[0069] The fixing device includes a copper surface layer 303 arranged around the outer peripheral side of the elastic sleeve 1. The outer peripheral surface of the elastic sleeve is wrapped by the copper surface layer 303 and connected to the fixing device 3, which can ensure that the earth pressure gauge does not have obvious lateral slip after installation, thereby improving the installation quality.

[0070] like Figure 3 As shown, when the external stress is uneven, the elastic sleeve 1 can deform freely to adapt to the stress change. At this time, the external stress can be decomposed into the force in the horizontal direction F1 and the vertical direction F2, among which the horizontal force F1 is the main monitoring object. Since the liquid storage chamber 101 is filled with water, the stress can be effectively dispersed, and F1 can be evenly divided into multiple smaller forces f, ensuring that the soil pressure gauge can still measure accurately when the stress is not concentrated.

[0071] Working method of this embodiment:

[0072] Assembling the earth pressure gauge: To avoid interference from on-site construction and the influence of dust, first prepare the earth pressure gauge 2 indoors, and prepare the elastic sleeve 1 that matches the size of the earth pressure gauge 2. Apply glue to the back of the earth pressure gauge 2, and then put the earth pressure gauge 2 into the inner cavity 102 of the elastic sleeve 1 so that the two fit completely.

[0073] On-site installation of the earth pressure gauge: transport the assembled earth pressure gauge 2 and elastic sleeve 1 assembly to the installation site. Select a steel bar of appropriate length according to the location where the earth pressure gauge 2 is to be buried, and insert the steel bar into the fixture 3. Then deliver the earth pressure gauge 2 to the designated location.

[0074] Backfill external soil: Backfill external soil around the soil pressure to the surface. After compaction, collect the sensor output value every hour to check whether the sensor is working properly. When the sensor can continuously output stable measured values ​​without large fluctuations, it indicates that the instrument is working well.

[0075] Example 2

[0076] Please combine Figures 4 to 7 In order to facilitate the carrying and disassembly of the components in the structure, two radially extending connecting rods 301 are relatively arranged on the outer peripheral side of the copper surface layer 303 of this embodiment. The connecting rod 301 can select the length of the steel bar according to the monitoring depth, and the steel bar is inserted into it, and then inserted into the soil to prevent the fixing device from shifting.

[0077] The end of the connecting rod 301 away from the copper surface layer 303 is rotatably provided with a docking ring 302, and the docking ring 302 can be adapted and plugged for the steel bars used for positioning. The connecting rod 301 and the docking ring 302 can be rotatably connected through a universal ball.

[0078] In the actual measurement process, the soil pressure gauge 2 needs to detect the pressure changes in the soil in different directions, such as a vertical soil pressure gauge and a horizontal soil pressure gauge. Therefore, the docking ring 302 is designed to be rotatable and the direction of the device can be freely adjusted as needed.

[0079] The copper surface layer 303 includes two semicircular half ring bodies, and the outer sides of both ends of the half ring bodies are provided with docking rods 304. When the two half ring bodies are mutually embraced to form the copper surface layer 303, two adjacent docking rods 304 are combined to form an insert.

[0080] A first cylinder 305 is disposed between the connecting rod 301 and the copper surface layer 303 . A first slot 306 for plugging and matching with the plug block is formed at one end of the first cylinder 305 , and a second slot 307 for plugging and matching with the connecting rod 301 is formed at the other end of the first cylinder 305 .

[0081] A screw rod 313 is rotatably provided inside the first cylinder 305, and two movable arms 315 are threadedly sleeved on both sides of the axial outer wall of the screw rod 313, a telescopic rod 316 is provided between the two movable arms 315, and clamping rods 317 are provided on opposite sides of the two movable arms 315, and a clamping hole 318 matching with the clamping rod 317 is opened on the docking rod 304.

[0082] The threads distributed on both sides of the axial outer wall of the screw rod 313 have opposite rotation directions.

[0083] A second cylinder 308 is rotatably arranged in the first cylinder 305, and a first bevel tooth 312 is arranged at one end of the second cylinder 308. A second bevel tooth 314 matching with the first bevel tooth 312 is sleeved and fixed on the outer side of the screw rod 313. A pressure rod 309 is inserted into the end of the second cylinder 308 away from the first bevel tooth 312. The pressure rod 309 can move axially relative to the second cylinder 308, and the end of the pressure rod 309 away from the first bevel tooth 312 extends into the second slot 307 to be pressed and fitted with the connecting rod 301; a spiral groove 310 is axially opened on the inner wall of the second cylinder 308, and a protrusion 311 that is slidably engaged with the groove 310 is arranged on the outer wall of the pressure rod 309.

[0084] During assembly of this embodiment, after the soil pressure gauge 2 is bonded in the inner cavity 102, the two semi-ring bodies are embraced on the outer peripheral side of the elastic sleeve 1, so that the two adjacent docking rods 304 form an insert block together, and then the first slot 306 of the first cylinder 305 is docked with the insert block, and then the connecting rod 301 is inserted into the second slot 307 to complete the assembly of the overall structure.

[0085] During this period, when the connecting rod 301 enters the second slot 307, it will contact the pressure rod 309, forcing the pressure rod 309 to move axially into the second cylinder 308, so that the protrusion 311 rubs and squeezes the axially spiral groove 310, which will force the second cylinder 308 to rotate, and the second cylinder 308 drives the first bevel gear 312, the second bevel gear 314, and the screw rod 313 to rotate, so that the screw rod 313 and the two moving arms 315 interact with each other in a threaded manner, and under the limiting action of the telescopic rod 316, the two moving arms 315 are brought close to each other, and the clamping rod 317 is clamped into the clamping hole 318 of the docking rod 304, so as to achieve the stable maintenance of the copper surface layer 303 to the elastic sleeve 1 The state of the stable maintenance, and the installation steps have a single order to avoid installation errors, which is stable and reliable and improves the installation efficiency.

[0086] Example 3

[0087] Please combine Figures 8 to 12Furthermore, in order to enable the soil pressure gauge 2 of the present invention to adapt to the installation and positioning of steel bars with different spacings when it is at a predetermined position on site, a first transmission rod 5 is inserted into the end of the connecting rod 301 of this embodiment close to the docking ring 302, and a slide groove 13 is provided on the connecting rod 301 for axial movement of the first transmission rod 5. One end of the first transmission rod 5 is connected to a connecting block 4, and the first transmission rod 5 rotates relative to the connecting block 4. One end of the connecting block 4 is connected to the docking ring 302, and the other end of the first transmission rod 5 is fixed with a second transmission rod 6 coaxial therewith. The second transmission rod 6 is slidably inserted into the interior of the connecting rod 301, and a first spring is sleeved on the outside of the second transmission rod 6. The two ends of the first spring are respectively connected to the groove wall of the slide groove 13 and the corresponding end wall of the first transmission rod 5. A synchronization plate 7 is provided at one end of the second transmission rod 6 away from the first transmission rod 5, and a first push rod 8 is provided on the side of the synchronization plate 7 away from the second transmission rod 6. A first insertion rod 10 is radially inserted on the outer wall of the connecting rod 301, and a support arm 9 is axially fixed inside the connecting rod 301. The centripetal end of the first insertion rod 10 is connected to the outer wall of the support arm 9 through a second spring, and a first insertion hole 12 that is plugged into and matched with the centrifugal end of the first insertion rod 10 is provided on the second slot 307, and an inclined groove 11 that is slidingly contacted and pressed with the first push rod 8 is provided on the first insertion rod 10.

[0088] Initially, the first push rod 8 contacts the inclined groove 11 (the second spring is compressed and deformed), and the first insertion rod 10 is accommodated in the connecting rod 301. If the connecting rod 301 is inserted into the second slot 307 at this time, the centrifugal end of the first insertion rod 10 will be separated from the first insertion hole 12.

[0089] In this embodiment, the first spring force is greater than the second spring force. Therefore, when the first transmission rod 5 is not pulled out from the connecting rod 301 , the first push rod 8 remains in a sliding contact pressure state in the inclined groove 11 .

[0090] That is to say, after the connecting rod 301 is inserted into the second slot 307 of the first cylinder 305, the first transmission rod 5 can be pulled out of the connecting rod 301 by a corresponding length according to the position of the pre-buried earth pressure gauge 2 on site and the distance between the two steel bars required for fixing, so that the docking rings 302 at both ends can be respectively penetrated and sleeved on the two positioning steel bars with corresponding distances.

[0091] When the first transmission rod 5 is pulled out from the connecting rod 301, the second transmission rod 6 and the synchronous plate 7 can be driven to make the first push rod 8 disengage from the inclined groove 11, so that the elastic force of the second spring is released to drive the first insertion rod 10 to be inserted into the first insertion hole 12, so that the connecting rod 301 and the first cylinder 305 are mutually locked after docking, which is stable and reliable.

[0092] Furthermore, in order to ensure that the first transmission rod 5 can stably maintain the corresponding pulled-out length after being pulled out from the connecting rod 301, a rotating hole (not shown) is provided on the connecting block 4 of the present embodiment, and the first transmission rod 5 is rotatably inserted in the rotating hole, and a worm 15 is rotatably inserted on the connecting block 4, and the worm 15 extends into the interior of the connecting block 4 and is sleeved and fixed with a third bevel gear 16, and a third cylinder 17 is coaxially rotatably inserted at one end of the first transmission rod 5, and one end of the third cylinder 17 extends into the interior of the connecting block 4 and is fixed with a third bevel gear 16 that matches the third bevel gear 16. Four-bevel teeth 18, a third transmission rod 19 is threadedly inserted at the other end of the third cylinder 17, a fixing plate 20 is arranged inside the first transmission rod 5, the third transmission rod 19 passes through the fixing plate 20, and moves axially relative to the fixing plate 20, a top block 21 is fixed at one end of the third transmission rod 19, a second plug rod 22 is radially inserted on the outer wall of the first transmission rod 5, and an inclined block 23 that slides and presses with the top block 21 is fixed to the centripetal end of the second plug rod 22, and a plurality of second plug holes 24 that are plugged and matched with the centrifugal end of the second plug rod 22 are axially opened on the groove wall of the slide groove 13.

[0093] The outer side of the second plug rod 22 is sleeved with a third spring, and when the top block 21 does not contact the inclined block 23, the third spring is in a non-deformed state. When the top block 21 contacts the inclined block 23, the third spring is in a compressed deformation state.

[0094] In this embodiment, after the first transmission rod 5 is pulled out of the connecting rod 301 to a corresponding length, according to the outer diameter specification of the on-site positioning steel bar, the rotating worm 15 drives the third bevel gear 16, the fourth bevel gear 18, and the third cylinder 17 to rotate, so that the third cylinder 17 and the third transmission rod 19 interact with each other in a threaded manner, and under the limiting action of the fixed plate 20, the top block 21 contacts the inclined block 23, forcing the second insertion rod 22 to be inserted into the second insertion hole 24 at the corresponding position after being pulled out, so as to stably maintain the pulling length of the first transmission rod 5 from the connecting rod 301.

[0095] Furthermore, in order to make it easier for the docking ring 302 of the present invention to be installed on the positioning steel bars pre-inserted on site when the soil pressure gauge 2 of the present invention is at a predetermined position on site, the docking ring 302 of this embodiment includes two semi-annular clamping rings 3021, one end of the two clamping rings 3021 is rotatably arranged inside the connecting block 4, and two worm wheels 14 cooperating with the worm 15 are relatively rotatably arranged inside the connecting block 4, and the threads on both sides of the outer wall of the worm 15 have opposite rotation directions, and the axles of the two worm wheels 14 are respectively fixedly connected to the corresponding ends of the two clamping rings 3021, so that the clamping rings 3021 can be closed or expanded as the worm wheel 14 rotates.

[0096] In this embodiment, when the worm 15 rotates, it can also drive the two worm wheels 14 to rotate synchronously in opposite directions, so as to drive the two clamping rings 3021 to be directly clamped on the outside of the corresponding positioning steel bars, thereby quickly completing the installation of the earth pressure gauge 2 at the predetermined position on site.

[0097] Example 4

[0098] Please combine Fig.13 , the installation method of the corrosion-resistant earth pressure gauge includes the following steps:

[0099] S1. Pre-preparation:

[0100] S11, component preparation, prepare the required earth pressure gauge 2 and the elastic sleeve 1 of the size matching it indoors; check the integrity of the earth pressure gauge 2 to ensure that it has no physical damage or electronic failure;

[0101] S12, assembling the components, slowly inserting the earth pressure gauge 2 into the inner cavity 102 of the elastic sleeve 1, applying glue to stick the earth pressure gauge 2 to the inner cavity 102 and ensure that it is completely fitted, and adjusting the position before the glue dries to ensure that the pressure plate of the earth pressure gauge 2 can accurately contact the inner wall of the elastic sleeve 1; after the glue dries, check the integrity and firmness of the components to ensure that there is no looseness or displacement;

[0102] S2. On-site installation:

[0103] S21, the installation position is determined. After arriving at the site, the specific installation position and burial depth of the earth pressure gauge 2 are determined according to the design drawings and engineering requirements; the installation position is determined using measuring tools to ensure that the installation of the earth pressure gauge 2 does not deviate from the predetermined position;

[0104] S22, steel bar preparation and fixture installation, select steel bars of appropriate length, adjust the steel bar length according to the monitoring depth, rotate the docking ring 302 to a suitable angle, insert the steel bar into the docking ring 302, and ensure that it is firmly connected to the elastic sleeve 1; slowly send the elastic sleeve 1 to the specified depth through the pre-excavated hole to ensure that the earth pressure gauge 2 reaches the target position smoothly;

[0105] S23, backfilling the external soil, continue to backfill the external soil to the ground, and perform compaction to ensure the stability of the overall structure, ensure the uniformity and density of the backfill soil layer, and avoid affecting the measurement accuracy of the earth pressure gauge 2 due to uneven backfill;

[0106] S3. Data monitoring and adjustment:

[0107] S31, initial data collection, after installation is completed, immediately start monitoring the output data of the earth pressure gauge 2, collect data once every hour, and record the pressure changes;

[0108] S32, stability check. In the initial data collection stage, focus on the output stability of the sensor. If the data is stable and there is no large fluctuation, it means that the earth pressure gauge is installed successfully. If there is abnormal data or large fluctuation, check in time and eliminate the fault.

[0109] S33. Continuous monitoring and maintenance. During the continuous monitoring phase after installation, data should be collected and recorded regularly to ensure the normal operation of the earth pressure gauge.

[0110] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A corrosion-resistant earth pressure gauge installation structure, characterized in that: It comprises a disc-shaped elastic sleeve, wherein the elastic sleeve has a liquid storage cavity, and an inner cavity is formed on the outer wall of the elastic sleeve away from the liquid storage cavity, wherein the inner cavity is used to accommodate the earth pressure gauge; a fixing device is provided on the elastic sleeve, wherein the fixing device is used to fix the elastic sleeve equipped with the earth pressure gauge at a predetermined position; The fixing device comprises a copper surface layer arranged around the outer peripheral side of the elastic sleeve, two radially extending connecting rods are arranged opposite to each other on the outer peripheral side of the copper surface layer, and a docking ring is rotatably arranged at one end of the connecting rod away from the copper surface layer, and the docking ring can be adapted and inserted for the steel bar used for positioning; The copper surface layer comprises two semi-circular half ring bodies, and the outer sides of both ends of the half ring bodies are provided with docking rods. When the two half ring bodies are mutually embraced to form the copper surface layer, two adjacent docking rods are combined to form an insert block; A first cylinder is arranged between the connecting rod and the copper surface layer, one end of the first cylinder is provided with a first slot for plugging and matching with the plug block, and the other end of the first cylinder is provided with a second slot for plugging and matching with the connecting rod; A screw rod is rotatably arranged inside the first cylinder, two movable arms are threadedly sleeved on opposite sides of the outer wall of the screw rod, a telescopic rod is arranged between the two movable arms, and clamping rods are arranged on opposite sides of the two movable arms, and a clamping hole matching with the clamping rod is opened on the docking rod; Wherein, the outer side of the soil pressure gauge is coated with an anti-rust coating layer.

2. The corrosion-resistant earth pressure gauge installation structure according to claim 1, characterized in that: The anti-rust coating layer is a WC ceramic reinforced nickel-based composite coating.

3. The corrosion-resistant earth pressure gauge installation structure according to claim 1, characterized in that: The pressure plate of the earth pressure gauge is bonded to the mounting surface of the inner cavity by glue.

4. The corrosion-resistant earth pressure gauge installation structure according to claim 1, characterized in that: The threads distributed on both sides of the axial outer wall of the screw rod have opposite rotation directions.

5. The corrosion-resistant earth pressure gauge installation structure according to claim 4, characterized in that: A second cylinder is rotatably arranged in the first cylinder, a first bevel tooth is arranged at one end of the second cylinder, a second bevel tooth matching with the first bevel tooth is sleeved and fixed on the outer side of the screw rod, a pressure rod is inserted into the end of the second cylinder away from the first bevel tooth, the pressure rod can move axially relative to the second cylinder, and the end of the pressure rod away from the first bevel tooth extends into the second slot to contact and press fit with the connecting rod; a spiral groove is axially opened on the inner wall of the second cylinder, and a protrusion that is slidably engaged with the groove is arranged on the outer wall of the pressure rod.

6. The corrosion-resistant earth pressure gauge installation structure according to claim 1, characterized in that: The cam is provided with a first spring, and two ends of the first spring are respectively connected to the groove wall and the corresponding end wall of the first transmission rod. A synchronous plate is provided at one end of the second transmission rod away from the first transmission rod, and a first push rod is provided on the side of the synchronous plate away from the second transmission rod. A first plug rod is radially inserted into the outer wall of the connecting rod, and a support arm is axially fixed to the inside of the connecting rod. The centripetal end of the first plug rod is connected to the outer wall of the support arm through the second spring. A first jack is provided on the second slot to engage with the centrifugal end of the first plug rod, and an oblique groove is provided on the first plug rod to engage with the sliding contact and pressure of the first push rod.

7. The corrosion-resistant earth pressure gauge installation structure according to claim 6, characterized in that: The elastic force of the first spring is greater than the elastic force of the second spring.

8. The corrosion-resistant earth pressure gauge installation structure according to claim 7, characterized in that: The first transmission rod is rotatably inserted in the rotating hole, and a worm is rotatably inserted in the connecting block, and the worm extends into the interior of the connecting block and is sleeved and fixed with a third bevel gear. A third cylinder is coaxially inserted into one end of the first transmission rod, and one end of the third cylinder extends into the interior of the connecting block and is fixed with a fourth bevel gear matching the third bevel gear. A third transmission rod is threadedly inserted in the other end of the third cylinder, and a fixing plate is arranged inside the first transmission rod. The third transmission rod passes through the fixing plate and moves axially relative to the fixing plate. A top block is fixed at one end of the third transmission rod, and a second plug rod is radially inserted on the outer wall of the first transmission rod, and an inclined block that is slidably contacted and pressed with the top block is fixed to the centripetal end of the second plug rod, and a plurality of second plug holes that are plugged and pressed with the centrifugal end of the second plug rod are axially opened on the wall of the slide groove, and a third spring is sleeved on the outer side of the second plug rod. When the top block does not contact the inclined block, the third spring is in a non-deformed state, and when the top block contacts the inclined block, the third spring is in a compressed deformation state.

9. A method for installing a corrosion-resistant earth pressure gauge using the installation structure according to any one of claims 1 to 8, characterized in that: The steps include: S1. Pre-preparation: S11. Component preparation: prepare the required earth pressure gauge and the elastic sleeve of the matching size indoors; check the integrity of the earth pressure gauge to ensure that it has no physical damage or electronic failure; S12. Assemble the components. Slowly insert the earth pressure gauge into the inner cavity of the elastic sleeve. Apply glue to stick the pressure gauge to the inner cavity and ensure that it fits completely. Adjust the position before the glue dries to ensure that the pressure plate of the earth pressure gauge can accurately contact the inner wall of the elastic sleeve. After the glue dries, check the integrity and firmness of the components to ensure that there is no looseness or displacement. S2. On-site installation: S21, the installation position is determined. After arriving at the site, the specific installation position and burial depth of the earth pressure gauge 2 are determined according to the design drawings and engineering requirements; the installation position is determined using measuring tools to ensure that the installation of the earth pressure gauge 2 does not deviate from the predetermined position; S22, steel bar preparation and fixture installation, select steel bars of appropriate length, adjust the length of steel bars according to the monitoring depth, rotate the docking ring to a suitable angle, insert the steel bars into the docking ring, and ensure that it is firmly connected to the elastic sleeve; slowly send the elastic sleeve to the specified depth through the pre-excavated hole to ensure that the earth pressure gauge reaches the target position smoothly; S23. Backfill the external soil. Continue to backfill the external soil to the ground and compact it to ensure the stability of the overall structure, ensure the uniformity and density of the backfill soil layer, and avoid affecting the measurement accuracy of the earth pressure gauge due to uneven backfill.

10. The method for installing a corrosion-resistant earth pressure gauge according to claim 9, characterized in that: The following steps are also included: S3. Data monitoring and adjustment: S31, initial data collection, after installation, immediately start monitoring the output data of the earth pressure gauge, collect data once every hour, and record the pressure changes; S32, stability check, in the initial data collection stage, focus on the output stability of the sensor. If the data is stable and there is no large fluctuation, it indicates that the earth pressure gauge is installed successfully; If abnormal data or large fluctuations occur, check and troubleshoot in time; S33. Continuous monitoring and maintenance. During the continuous monitoring phase after installation, data should be collected and recorded regularly to ensure the normal operation of the earth pressure gauge.

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