Soil pressure monitoring sensor device and method of operation thereof

Abstract

The application discloses a soil pressure monitoring sensing device and a working method thereof, and relates to the technical field of civil engineering monitoring, and comprises an antiskid base, a double-piston-rod hydraulic telescopic rod arranged on the antiskid base, and a supporting surface tray assembly arranged on the double-piston-rod hydraulic telescopic rod. The double-piston-rod hydraulic telescopic rod comprises a cylinder and a double-piston rod sleeved in the cylinder, the double-piston rods are arranged in a nested mode, the top of the double-piston rod is connected with the supporting surface tray assembly, and the supporting height of the supporting surface tray assembly changes with the extension and contraction of the double-piston rod. The supporting height can be accurately adjusted, and the soil pressure monitoring and structural support in tunnel, foundation pit and other supporting projects are suitable.

Description

Technical Field

[0001] This invention relates to the field of civil engineering monitoring technology, and in particular to an earth pressure monitoring sensor and its working method. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Accurate monitoring of earth pressure is a key aspect of ensuring structural safety during the construction and operation phases of civil engineering projects such as tunnel initial support and foundation pit support.

[0004] Current technologies have the following shortcomings: The contact area between the support surface of the earth pressure monitoring device and the supporting structure (such as the initial support of a tunnel) is too small, leading to localized stress concentration of earth pressure, which can easily damage the supporting structure and reduce the efficiency of earth pressure transmission to the sensor. The sensor installation structure is poorly designed, resulting in an obstructed earth pressure transmission path, poor monitoring data accuracy, and an inability to accurately reflect the interaction between the soil and the supporting structure. The connection between the device and the soil lacks anti-slip and anti-displacement designs, making it prone to loosening and displacement under earth pressure in complex soil environments, leading to monitoring failure and affecting the assessment of engineering safety. Summary of the Invention

[0005] To address the aforementioned issues, this invention proposes an earth pressure monitoring sensor and its operating method, which can precisely adjust the support height and is applicable to earth pressure monitoring and structural support in tunnel, foundation pit, and other support engineering projects.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides an earth pressure monitoring and sensing device, comprising: an anti-slip base, a double piston rod hydraulic telescopic rod disposed on the anti-slip base, and a support surface tray assembly disposed on the double piston rod hydraulic telescopic rod; The dual-piston rod hydraulic telescopic rod includes a cylinder and a dual-piston rod sleeved inside the cylinder. The dual-piston rods are nested together, and the top of the dual-piston rods is connected to a support surface tray assembly. The support height of the support surface tray assembly changes with the extension and retraction of the dual-piston rods.

[0007] As an alternative implementation, the support tray assembly includes an upper tray and a lower tray seat connected to the upper tray; the upper tray has a slot in the center that matches the shape of the earth pressure box, and a positioning boss at the bottom of the slot that cooperates with the positioning groove of the earth pressure box; the inner wall of the slot is pasted with an anti-slip buffer pad; and the bottom of the lower tray seat is connected to a double piston rod.

[0008] As an alternative implementation, the dual piston rod includes a first piston rod and a second piston rod nested together. The first piston rod is sleeved inside the cylinder, and the second piston rod is nested inside the first piston rod. The piston area of ​​the first piston rod is larger than that of the second piston rod, so as to switch the support stiffness and adjustment accuracy under different soil pressure monitoring loads.

[0009] As an alternative implementation, the first piston rod and the second piston rod can extend and retract synchronously or independently.

[0010] As an alternative implementation, the cylinder is a hollow, sealed hydraulic cavity filled with hydraulic oil.

[0011] As an alternative implementation, the dual-piston rod hydraulic telescopic rod also includes an oil pump motor, which drives the flow of hydraulic oil to control the extension and retraction of the dual-piston rod.

[0012] As an alternative implementation, the anti-slip base is disposed at the bottom of the cylinder, and the bottom surface of the anti-slip base is provided with interlocking anti-slip teeth.

[0013] As an alternative implementation, the outer wall of the dual piston rod is provided with a notch, and a locking block is provided in the notch. The locking block is hinged to the column by a rotating shaft.

[0014] As an alternative implementation, after the dual piston rods extend and retract to the target monitoring position, the locking block is rotated into the notch to lock the extension and retraction state of the dual piston rods.

[0015] Secondly, the present invention provides a method for operating the above-mentioned earth pressure monitoring and sensing device, comprising: The positioning boss at the bottom of the upper tray slot engages with the positioning groove at the bottom of the earth pressure box to achieve positioning and fixation of the earth pressure box. Hydraulic oil is filled inside the cylinder, and power is provided by the oil pump motor to drive the hydraulic oil to flow, thereby controlling the synchronous or independent extension and retraction of the first piston rod and the second piston rod to adjust the support height of the upper tray. After the dual piston rods extend and retract to the target monitoring position, rotate the locking block into the notch to lock the extension and retraction state of the dual piston rods.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention proposes an earth pressure monitoring sensor and its working method. A support tray assembly stably clamps the earth pressure cell through slots and a buffer pad, achieving precise transmission of earth pressure. The large contact area design of the support tray assembly evenly distributes the earth pressure to the earth pressure cell, avoiding stress concentration. The anti-slip buffer pad and positioning structure further ensure the stability of the earth pressure cell under stress, improving the accuracy of the monitoring data. The dual-piston hydraulic telescopic rod design, with its two rods and different piston areas, precisely adjusts the support height and stress state according to the diverse monitoring conditions in civil engineering projects (such as different depths of foundation pits, different fill layers of dams, and different slope sections), achieving accurate transmission and monitoring of earth pressure. The anti-slip base structure, with its anti-slip teeth and locking mechanism, enhances the friction between the device and the soil, preventing device displacement and ensuring stable operation even in complex environments (muddy, slippery, vibrating) in civil engineering projects, guaranteeing the continuity and accuracy of earth pressure monitoring. It solves the problems of small support surface, stress concentration, soil pressure transmission distortion and loose installation in traditional soil pressure monitoring. It is suitable for real-time monitoring of soil pressure in civil engineering and water conservancy projects and has the characteristics of stable support, accurate monitoring and strong practicality.

[0017] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the earth pressure monitoring sensing device provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the support surface tray assembly provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of a double-piston rod hydraulic telescopic rod provided in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the anti-slip base provided in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the locking mechanism provided in Embodiment 1 of the present invention; The components include: 1. Upper tray; 2. Lower tray seat; 3. First piston rod; 4. Second piston rod; 5. Clamping block; 6. Rotating shaft; 7. First cylinder; 8. Column; 9. Oil pump motor; and 10. Anti-slip base. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that the terms “comprising” and “including”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0024] Example 1 This embodiment provides an earth pressure monitoring sensor device with a large support surface, efficient earth pressure transmission, accurate monitoring, and stable installation, solving the problems of small support surface, low monitoring accuracy, and easy loosening of installation in existing technologies. The overall structure is as follows: Figure 1 As shown, it includes a support tray assembly, a double piston rod hydraulic telescopic rod, an anti-slip base, and a locking mechanism.

[0025] In this embodiment, as Figure 2 As shown, the support tray assembly includes an upper tray 1 and a lower tray seat 2.

[0026] Specifically: The upper tray 1 adopts a large support surface design to increase the contact area with the earth pressure box.

[0027] A slot matching the shape of the earth pressure box is opened in the center of the upper tray 1, and an anti-slip cushioning layer, such as rubber or silicone, is pasted on the inner wall of the slot.

[0028] A positioning boss is set at the bottom of the slot to precisely match the positioning groove at the bottom of the earth pressure box, so as to achieve accurate positioning and fixation of the earth pressure box. This ensures that the earth pressure box is subjected to uniform force and has a stable position when installed at the earth pressure measurement site (such as the side wall of the foundation pit or inside the dam), and avoids stress concentration that could lead to distorted monitoring data.

[0029] The lower pallet seat 2 is made of metal and is fixed to the upper pallet 1 by bolts. It is also welded or bolted to the double piston rod hydraulic telescopic rod, serving as the intermediate hub for transmitting earth pressure from the upper pallet 1 to the double piston rod hydraulic telescopic rod.

[0030] In this embodiment, as Figure 3 As shown, the double piston rod hydraulic telescopic rod includes a first cylinder 7, a first piston rod 3 sleeved in the first cylinder, a second piston rod 4 sleeved in the second cylinder, and an oil pump motor 9.

[0031] The inner cavity of the column 8 of the locking mechanism also serves as the second cylinder, and its internal oil chamber is connected to the oil chamber of the first cylinder 7 to form a two-stage telescopic hydraulic circuit.

[0032] Specifically: The first cylinder 7 is a hollow, sealed hydraulic cavity filled with hydraulic oil, providing a medium space for the extension and retraction of the piston rod.

[0033] The first piston rod 3, as the outer rod, is slidably disposed inside the first cylinder 7; the second piston rod 4, as the inner rod, is slidably disposed inside the hollow cavity of the first piston rod 3. The two rods are arranged coaxially to form a two-stage telescopic mechanism.

[0034] The piston area of ​​the first piston rod 3 is larger than that of the second piston rod 4, so that the telescopic rod can switch the support stiffness and adjustment accuracy according to different monitoring conditions on site and under different earth pressure monitoring loads, so as to truly transmit the dynamic changes of earth pressure. For example, in the case of deep foundation pit with large load, the first piston rod 3 with a large piston area is used to dominate the telescopic movement, while the second piston rod 4 with a small piston area is used in the case of shallow slope with small load.

[0035] The lower tray seat 2 is fixedly connected to the top of the first piston rod 3 and the second piston rod 4, serving as a hub for force transmission.

[0036] The oil pump motor 9 provides power to the hydraulic system, drives the hydraulic oil flow, and controls the synchronous or independent extension and retraction of the first piston rod 3 and the second piston rod 4 to adjust the support height of the upper tray 1 and adapt to the monitoring needs of different engineering parts.

[0037] In this embodiment, as Figure 4 As shown, the anti-slip base 10 is made of metal and is located at the bottom of the first cylinder 7. It is fixed to the bottom of the first cylinder 7 by a flange and bolts to ensure a firm connection.

[0038] The bottom surface of the anti-slip base 10 is provided with interlocking anti-slip teeth to enhance the friction between the device and the soil at the monitoring site (muddy foundation pit bottom, wet and slippery dam slope) and prevent the device from shifting due to ground slippage, water erosion or soil creep.

[0039] In this embodiment, as Figure 5 As shown, the locking mechanism includes a locking block 5, a rotating shaft 6, and a column 8.

[0040] Specifically: A notch is provided on the outer wall of the first piston rod 3 and the second piston rod 4. A locking block 5 is provided in the notch. The locking block 5 is hinged to the column 8 through the rotating shaft 6. The column 8 is fixed to the top of the first cylinder 7.

[0041] After the first piston rod 3 and the second piston rod 4 extend and retract to the target monitoring position, the rotating locking block 5 is used to lock them into the notch, thus locking the extension and retraction state of the first piston rod 3 and the second piston rod 4. This prevents the piston rods from shifting due to hydraulic fluctuations or soil vibrations during on-site monitoring, ensuring the stability of the device's support and the monitoring status.

[0042] The aforementioned earth pressure monitoring and sensing device based on a large support surface solves the core defects of traditional devices through the synergistic effect of its components. It can achieve stable and accurate earth pressure monitoring in complex civil engineering and water conservancy sites and is suitable for various engineering scenarios such as foundation pits, dams, and slopes.

[0043] Example 2 This embodiment provides a method for operating the above-mentioned earth pressure monitoring and sensing device, including: The positioning boss at the bottom of the upper tray slot engages with the positioning groove at the bottom of the earth pressure box to achieve positioning and fixation of the earth pressure box. Hydraulic oil is filled inside the cylinder, and power is provided by the oil pump motor to drive the hydraulic oil to flow, thereby controlling the synchronous or independent extension and retraction of the first piston rod and the second piston rod to adjust the support height of the upper tray. After the dual piston rods extend and retract to the target monitoring position, rotate the locking block into the notch to lock the extension and retraction state of the dual piston rods.

[0044] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. An earth pressure monitoring and sensing device, characterized in that, include: Anti-slip base, double piston rod hydraulic telescopic rod on the anti-slip base, and support surface tray assembly on the double piston rod hydraulic telescopic rod; The dual-piston rod hydraulic telescopic rod includes a cylinder and a dual-piston rod sleeved inside the cylinder. The dual-piston rods are nested together, and the top of the dual-piston rods is connected to a support surface tray assembly. The support height of the support surface tray assembly changes with the extension and retraction of the dual-piston rods.

2. A soil pressure monitoring sensor device as claimed in claim 1, wherein, The support tray assembly includes an upper tray and a lower tray seat connected to the upper tray; the upper tray has a slot in the center that matches the shape of the earth pressure box, and a positioning boss at the bottom of the slot that cooperates with the positioning groove of the earth pressure box. The inner wall of the slot is pasted with an anti-slip buffer pad, and the bottom of the lower tray seat is connected to the double piston rod.

3. A soil pressure monitoring sensor device as claimed in claim 1, wherein, The dual piston rod includes a first piston rod and a second piston rod nested together. The first piston rod is sleeved inside the cylinder, and the second piston rod is nested inside the first piston rod. The piston area of ​​the first piston rod is larger than that of the second piston rod, so as to switch the support stiffness and adjustment accuracy under different earth pressure monitoring loads.

4. A soil pressure monitoring sensor device as claimed in claim 3, wherein The first piston rod and the second piston rod extend and retract synchronously or independently.

5. A soil pressure monitoring sensor device as claimed in claim 1, wherein, The cylinder is a hollow, sealed hydraulic cavity filled with hydraulic oil.

6. A soil pressure monitoring sensor device as claimed in claim 5, wherein, The dual-piston rod hydraulic telescopic rod also includes an oil pump motor, which drives the flow of hydraulic oil, thereby controlling the extension and retraction of the dual-piston rod.

7. A soil pressure monitoring sensor device as claimed in claim 1, wherein, The anti-slip base is located at the bottom of the cylinder, and the bottom surface of the anti-slip base is provided with interlocking anti-slip teeth.

8. A soil pressure monitoring sensor device as claimed in claim 1, characterized in that The outer wall of the double piston rod is provided with a notch, and a locking block is provided in the notch. The locking block is hinged to the column through a rotating shaft.

9. A soil pressure monitoring sensor device as claimed in claim 8, wherein, After the dual piston rods extend and retract to the target monitoring position, rotate the locking block into the notch to lock the extension and retraction state of the dual piston rods.

10. A method of operating a soil pressure monitoring sensor device according to any one of claims 1 to 9, characterised in that, include: The positioning boss at the bottom of the upper tray slot engages with the positioning groove at the bottom of the earth pressure box to achieve positioning and fixation of the earth pressure box. Hydraulic oil is filled inside the cylinder, and power is provided by the oil pump motor to drive the hydraulic oil to flow, thereby controlling the synchronous or independent extension and retraction of the first piston rod and the second piston rod to adjust the support height of the upper tray. After the dual piston rods extend and retract to the target monitoring position, rotate the locking block into the notch to lock the extension and retraction state of the dual piston rods.

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