Shield excavation soil settlement detection device at gas pipeline

Abstract

A gas pipeline shield excavation soil body settlement detection device comprises a supporting surface, a spring, a movable resistance plate, a touch rod, a gas pipeline and a sleeve, the sleeve extends into the gas pipeline shield excavation soil body, the upper end of the sleeve is connected with the bottom surface of the supporting surface, the supporting surface is located on the surface of the soil body above the gas pipeline, and a voltage device is installed above the supporting surface; resistor strips are symmetrically arranged on the two sides of the sleeve, the upper ends of the resistor strips penetrate through the supporting face to be connected with the transformer and connected with a circuit, the movable resistor plate is arranged in the sleeve in a vertically movable mode, the side edge of the movable resistor plate makes contact with the resistor strips, the spring is arranged in the sleeve, and the upper end of the spring abuts against the bottom face of the supporting face. The lower end of the spring abuts against the top face of the movable resistance plate, the bottom face of the movable resistance plate is connected with the upper end of the touch rod, and the lower end of the touch rod is connected with a to-be-detected gas pipeline. According to the utility model, the settlement amplitude of the soil body above the gas pipeline is detected in real time.

Description

Technical Field

[0001] The utility model belongs to the field of shield starting shaft excavation construction, and relates to a shield excavation soil settlement detection device at a gas pipeline. Background Art

[0002] With the development of urban subway rail transit construction, shield launch shaft construction technology has gradually improved. However, during the construction process, the existing gas pipelines in the city are often affected by it. The most obvious one is that when the shield launch shaft is excavated, the soil is disturbed by external forces, resulting in uncertain settlement, which will damage existing gas pipelines and other structures, bringing many challenges to the overall construction process and quality.

[0003] Traditionally, before the construction of the shield launch shaft, a detailed investigation of the construction site will be conducted to understand the depth, location and direction of the underground gas pipeline, and its safety integrity will be evaluated after the construction is completed. However, at present, there are more investigation and evaluation methods before and after construction for the soil above the gas pipeline, and there are few settlement detection methods for the entire process of construction. When the gas pipeline is damaged during construction, it will cause safety accidents such as explosions and pollution leakage, which increases the construction risk, construction cost and time. Relevant research is urgently needed to improve such problems. Summary of the invention

[0004] In order to overcome the problem of soil settlement during shield excavation affecting surrounding and underground gas pipelines, the utility model provides a shield excavation soil settlement detection device at a gas pipeline, which detects the settlement amplitude of the soil above the gas pipeline in real time.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A device for detecting the settlement of shield excavated soil at a gas pipeline comprises a supporting surface, a spring, a movable resistance plate, a trigger rod, a gas pipeline and a sleeve, wherein the sleeve extends into the shield excavated soil at the gas pipeline, the upper end of the sleeve is connected to the bottom surface of the supporting surface, the supporting surface is located on the soil surface above the gas pipeline, and the voltage device is installed above the supporting surface; resistance bars are symmetrically arranged on both sides of the sleeve, the upper ends of the resistance bars pass through the supporting surface and are connected to the voltage device and connect the circuit, the movable resistance plate is movably arranged inside the sleeve, the side of the movable resistance plate is in contact with the resistance bar, the spring is arranged inside the sleeve, the upper end of the spring is against the bottom surface of the supporting surface, the lower end of the spring is against the top surface of the movable resistance plate, the bottom surface of the movable resistance plate is connected to the upper end of the trigger rod, and the lower end of the trigger rod is connected to the gas pipeline to be detected.

[0007] Furthermore, the supporting surface is a circular insulating panel.

[0008] Furthermore, the voltage device includes a power supply and a voltage detection device.

[0009] Furthermore, the trigger rod includes a support rod, a rotating shaft and a foot, the top of the support rod is connected to the bottom surface of the movable resistor plate, the foot is closely attached to the gas pipeline to be detected, and the foot is connected to the support rod through the rotating shaft.

[0010] Preferably, there are at least three actuating rods, which are arranged on the bottom surface of the movable resistor plate.

[0011] The device of the utility model has the characteristic of real-time detection of soil settlement above the gas pipeline. The device of the application is provided with a fixed double-sided resistance strip and a movable movable resistance plate. By connecting the value of the voltage of the circuit, the function of real-time feedback of the soil settlement amplitude is realized.

[0012] The beneficial effects of the utility model are mainly manifested in: real-time detection of the settlement amplitude of the soil above the gas pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a top view of the shield excavation soil settlement detection device at the gas pipeline.

[0014] Figure 2 This is a schematic diagram of the front section of the shield excavation soil settlement detection device at the gas pipeline.

[0015] Figure 3 This is a schematic diagram of the front section of area A.

[0016] Figure 4 It is a three-dimensional schematic diagram of the movable resistor plate 4 and the trigger rod 5.

[0017] Figure 5 It is a three-dimensional schematic diagram of sleeve 7.

[0018] Figure 6 It is a schematic diagram of the circuit principle.

[0019] Among them, 1 is soil, 2 is supporting surface, 3 is spring, 4 is movable resistance plate, 5 is trigger rod, 501 is supporting rod, 502 is rotating shaft, 503 is foot, 6 is gas pipeline, 7 is sleeve, 701 is resistance bar, 702 is insulating plate, and 8 is voltage device. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] Reference Figure 1 to Figure 6 , a shield excavation soil settlement detection device at a gas pipeline, comprising a support surface 2, a spring 3, a movable resistor plate 4, a trigger rod 5, a gas pipeline 6 and a sleeve 7, wherein:

[0022] The support surface 2 is a circular insulating panel located on the surface of the soil 1 above the gas pipeline 6. Figure 1 As shown;

[0023] The voltage device 8 is installed above the support surface 2, which contains power supply and voltage detection equipment, which are all existing devices and will not be further described;

[0024] The sleeve 7 is connected to the bottom surface of the support surface 2, and has symmetrically arranged resistor bars 701 therein. The resistor bars 701 are connected to the voltage device 8 through the support surface 2 and the circuit is connected. Figure 5 As shown;

[0025] The movable resistor plate 4 is arranged inside the sleeve 7, and is in contact with the resistor strip 701 around it, forming a circuit closed loop with the voltage device, and is located below the spring 3. The spring 3 is arranged inside the sleeve 7, and the upper end of the spring 3 abuts against the bottom surface of the support surface 2, and the lower end abuts against the top surface of the movable resistor plate 4, playing a damping role. Figure 2 As shown;

[0026] The trigger rods 5 are made of insulating material and are designed to have five of them, which are arranged on the bottom surface of the moving resistor plate 4. Figure 4 As shown, the trigger rod 5 is composed of a support rod 501, a rotating shaft 502, and a foot 503, wherein the top of the support rod 501 is connected to the bottom surface of the movable resistor plate 4, and the foot 503 is close to the gas pipeline 6 and is connected to the support rod 501 through the rotating shaft 502, so as to realize the rotation function of the foot 503 within a certain angle, such as Figure 3 As shown;

[0027] In combination with the embodiment, the specific construction process of this application is as follows:

[0028] (1) First, the sleeve 7 is welded and installed on the bottom surface of the support surface 2, and the voltage device 8 is installed on the top surface of the support surface 2 and connected to the resistance bar 701;

[0029] (2) Next, the top of the support rod 501 is welded to the bottom surface of the movable resistor plate 4, and the foot 503 is installed on the lower end of the support rod 501 through the rotating shaft 502;

[0030] (3) Then, the spring 3 is installed inside the sleeve 7, and the movable resistor plate 4 is installed below the spring 3, and it is in good contact with the resistor strips 701 on both sides;

[0031] (4) Finally, the device is installed in the soil 1 above the gas pipeline 6 so that the foot 503 abuts against the gas pipeline 6, and the voltage regulator 8 is turned on.

[0032] (5) Principle of soil settlement detection: When the soil 1 settles, the distance between the support plate 2 on the surface of the soil 1 and the gas pipeline 6 will be reduced, causing the spring 3 to be compressed, that is, the total resistance value surrounded by the moving resistor plate 4 and the resistor bar 701 is reduced, further reducing the value of the voltage meter 8. By comparing with the initial value, the settlement value of the soil 1 can be calculated.

[0033] The contents described in the embodiments of this specification are merely enumerations of implementation forms of the utility model concept and are for illustrative purposes only. The protection scope of the utility model should not be considered to be limited to the specific forms described in this embodiment, and the protection scope of the utility model also extends to equivalent technical means that ordinary technicians in this field can think of based on the concept of the utility model.

Claims

1. A device for detecting soil settlement during shield excavation at a gas pipeline, characterized in that: The detection device includes a supporting surface, a spring, a movable resistor plate, a trigger rod, a gas pipeline and a sleeve. The sleeve extends into the shield excavated soil at the gas pipeline. The upper end of the sleeve is connected to the bottom surface of the supporting surface. The supporting surface is located on the soil surface above the gas pipeline. The voltage device is installed above the supporting surface. The resistor bars are symmetrically arranged on both sides of the sleeve. The upper ends of the resistor bars pass through the supporting surface and are connected to the voltage device and connect the circuit. The movable resistor plate is movably arranged inside the sleeve. The side of the movable resistor plate contacts the resistor bar. The spring is arranged inside the sleeve. The upper end of the spring abuts against the bottom surface of the supporting surface. The lower end of the spring abuts against the top surface of the movable resistor plate. The bottom surface of the movable resistor plate is connected to the upper end of the trigger rod. The lower end of the trigger rod is connected to the gas pipeline to be detected.

2. The shield excavation soil settlement detection device at the gas pipeline according to claim 1, characterized in that: The supporting surface is a circular insulating panel.

3. The shield excavation soil settlement detection device at the gas pipeline according to claim 1 or 2, characterized in that: The voltage device includes a power supply and a voltage detection device.

4. The shield excavation soil settlement detection device at the gas pipeline according to claim 1 or 2, characterized in that: The trigger rod comprises a support rod, a rotating shaft and a foot. The top end of the support rod is connected to the bottom surface of the movable resistor plate. The foot is closely attached to the gas pipeline to be detected. The foot is connected to the support rod through the rotating shaft.

5. The shield excavation soil settlement detection device at the gas pipeline according to claim 4, characterized in that: There are at least three actuating rods, which are arranged on the bottom surface of the moving resistor plate.

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