Tunnel section convergence displacement monitoring device

Abstract

The utility model relates to the technical field of tunnel construction, in particular to a tunnel section convergence displacement monitoring device, which mainly comprises a displacement sensing group chain and a data acquisition unit, the displacement sensing group chain comprises a plurality of acceleration sensors, each acceleration sensor is provided with a first wireless transmission module, and the data acquisition unit is connected with the displacement sensing group chain. The acceleration sensors are connected in series through flexible joints, the acceleration sensors are electrically connected with the data acquisition unit through the corresponding first wireless transmission modules, the data acquisition unit is arranged at one end of the displacement sensing group chain, a sleeve is arranged on the periphery of the displacement sensing group chain, and the data acquisition unit is electrically connected with the data acquisition unit through the corresponding first wireless transmission modules. A detachable traction mechanism is arranged at the end part of one end, far away from the data acquisition unit, of the displacement sensing group chain. The device can be conveniently and rapidly installed, and has the advantages of small size, light weight, high precision and low energy consumption.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a tunnel section convergence displacement monitoring device. Background Art

[0002] The construction of subway tunnels by mining method occupies very few ground resources, has a fast excavation speed, and has less noise and disturbance during construction. It has technical and economic advantages in urban areas with good soil quality. Compared with other transportation projects, subway projects are often located in special rock and soil geological environments. There are many problems in the design and construction that are not yet fully understood. It is almost impossible to accurately predict the dynamic response of the tunnel and the surrounding environment during the construction process. In order to ensure the safety of subway construction, an effective means is to strengthen monitoring during the construction process, and optimize or modify the design and construction plan based on the deformation and stress of the rock and soil layer, tunnel structure and surrounding buildings (structures) and the change information of groundwater, that is, information construction. The construction of subways in cities is often affected by the diversity and complexity of the surrounding environment of urban underground projects, the dense underground pipelines, and the numerous existing structures around the project, resulting in many safety risks in the construction of subways in urban rock and soil. Therefore, safety monitoring has become an important means to ensure the safety of subway construction and protect the buildings along the line.

[0003] The object of tunnel section convergence displacement monitoring is the tunnel section that has been excavated by the dark excavation method. The monitoring of tunnel section convergence displacement is currently mainly carried out by manual means such as total stations and levels. It is difficult to achieve automatic monitoring. The frequency of manual monitoring is low, the labor cost is high, and it is limited by the on-site construction organization, and the monitoring personnel are subject to construction risks. The existing array displacement meters lack safe and effective waterproof measures, and are prone to leakage during monitoring, affecting the effectiveness of monitoring. Some array displacement meters may have certain waterproof covers, but there is no very effective way to install the array displacement meters in the waterproof covers conveniently and quickly. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a tunnel section convergence displacement monitoring device, which has the advantages of being waterproof and convenient and quick to install.

[0005] To achieve the above purpose, the present invention can be implemented through the following technical solutions:

[0006] A tunnel section convergence displacement monitoring device includes a displacement sensor chain and a data collector, wherein the displacement sensor chain includes a plurality of acceleration sensors, each of the acceleration sensors is configured with a first wireless transmission module, the plurality of acceleration sensors are connected in series via flexible joints, the plurality of acceleration sensors are electrically connected to the data collector via their respective first wireless transmission modules, the data collector is arranged at one end of the displacement sensor chain, a sleeve is arranged on the periphery of the displacement sensor chain, and a detachable traction mechanism is arranged at one end of the displacement sensor chain away from the data collector.

[0007] Furthermore, a slide groove is provided inside the sleeve, and a pulley is provided at one end of the displacement sensor group chain away from the data collector, and the pulley is aligned with the slide groove for installation.

[0008] Furthermore, the traction mechanism includes a clamping portion, a traction rope and a gravity ball, the clamping portion is detachably connected to the end of the displacement sensor group chain, one end of the traction rope is fixedly connected to the clamping portion, and the other end thereof is fixedly connected to the gravity ball.

[0009] Furthermore, a positioning groove is provided on the edge of the tube opening of the sleeve, and the acceleration sensor is snapped into the positioning groove through a first buckle.

[0010] Furthermore, end covers are provided at both end ports of the sleeve.

[0011] Furthermore, a prism is installed at a port at one end of the sleeve away from the data collector.

[0012] Furthermore, a second buckle is arranged on the periphery of the sleeve.

[0013] Furthermore, the sleeve includes a plurality of sleeve units, and the plurality of sleeve units are fixedly connected by screws.

[0014] Furthermore, the joints between adjacent sleeve units are sealed by sealing glue or sealing tape.

[0015] Furthermore, the monitoring device also includes a server, and the data collector sends the received data to the server via the second wireless transmission module.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a casing on the periphery of the displacement sensor chain, which can not only ensure the waterproofness of the equipment, but also improve the tensile strength. It can be conveniently and quickly installed through a traction mechanism, and has the advantages of small size, light weight, high precision and low energy consumption. Through appropriate design for the construction scene of the mine excavation method, the displacement sensor chain can be arranged in the soil between the underground structure and the surface in a horizontal or inclined manner, so as to intuitively and accurately obtain the displacement and settlement information of the soil, and realize the needs of dynamic monitoring and early warning through data acquisition and wireless transmission functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a principle block diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall external structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the overall internal structure of the utility model;

[0021] Figure 4 yes Figure 3 The enlarged structural diagram at A in the middle;

[0022] Figure 5 It is a schematic diagram of the installation structure of the pulley of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the chute of the utility model;

[0024] Figure 7 It is a structural schematic diagram of the positioning groove of the utility model;

[0025] Figure 8 It is a structural schematic diagram of the first buckle of the utility model;

[0026] Fig. 9 It is a schematic diagram when the utility model is implemented;

[0027] In the figure: 1. displacement sensor chain; 11. acceleration sensor; 12. pulley; 2. flexible joint; 3. sleeve; 31. slide groove; 32. positioning groove; 4. traction mechanism; 41. gripping part; 42. traction rope; 43. gravity ball; 5. prism; 6. first buckle; 7. second buckle; 8. data collector; 9. manual monitoring point. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. The terms such as "upper", "inner", "middle", "left", "right" and "one" used in this specification are only used to facilitate the description and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship shall also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0029] like Figure 1-3 As shown, the tunnel section convergence displacement monitoring device described in the utility model mainly includes a displacement sensor group chain 1 and a data collector 8, wherein the displacement sensor group chain 1 includes a plurality of acceleration sensors 11, each acceleration sensor 11 is configured with a first wireless transmission module, which is convenient for data collection and transmission, and the plurality of acceleration sensors 11 are connected in series through a flexible joint 2, and the plurality of acceleration sensors 11 are electrically connected to the data collector 8 through their respective corresponding first wireless transmission modules, and the data collector 8 is arranged at one end of the displacement sensor group chain 1, and a sleeve 3 is arranged on the periphery of the displacement sensor group chain 1, and a detachable traction mechanism 4 is arranged at the end of the displacement sensor group chain 1 away from the data collector 8. The principle of the displacement sensor group chain 1 is to convert the acceleration of each acceleration sensor 11 into an electrical signal change of the sensing unit when it is displaced, so as to realize real-time monitoring of the displacement and deformation of each detail of the tunnel during the construction process. In this embodiment, the displacement sensor group chain 1 installed along the tunnel vault includes 10 acceleration sensors 11, such as Fig. 9 As shown, the sensor farthest from the data collector 8 is sensor No. 1, which is located close to the artificial monitoring point 9, and the data of the two can be compared and verified with each other. The casing 3 is preferably a thickened soft casing 3, which can ensure the waterproofness of the equipment and improve the tensile strength. The first wireless transmission module is preferably a WIFI or 4G communication module.

[0030] like Figure 5-6 As shown, in order to allow the displacement sensor chain 1 to be more conveniently and quickly inserted into the sleeve 3, a slide groove 31 is provided inside the sleeve 3. Specifically, a slide groove 31 can be provided on each of the two opposite inner walls inside the sleeve 3. Corresponding to the slide groove 31, a pulley 12 is provided on each of the two opposite sides of the end of the displacement sensor chain 1 away from the data collector 8. When installing the displacement sensor chain 1, the two pulleys 12 are aligned with the two slide grooves 31 for installation. In this way, the displacement sensor chain 1 can slide forward more easily inside the sleeve 3, reducing the difficulty of installation and increasing the speed of installation.

[0031] like Figure 4As shown, in this embodiment, the traction mechanism 4 includes a clamping portion 41, a traction rope 42 and a gravity ball 43. The clamping portion 41 is detachably connected to the end of the displacement sensor group chain 1 away from the data collector 8, one end of the traction rope 42 is fixedly connected to the clamping portion 41, and the other end of the traction rope 42 is fixedly connected to the gravity ball 43. When the displacement sensor group chain 1 is installed, the end of the displacement sensor group chain 1 away from the data collector 8 is first connected to the clamping portion 41, and then the gravity ball 43 is first connected to the clamping portion 41. Put the gravity ball 43 into the casing 3 from one end, tilt the casing 3, and make the gravity ball 43 roll forward in the casing 3 under the action of gravity, and at the same time push the displacement sensor group chain 1 to move forward, and the gravity ball 43 drives the displacement sensor group chain 1 to move forward. When the gravity ball 43 rolls out of the other end of the casing 3, hold the gravity ball 43 by hand, so as to pull the displacement sensor group chain 1 to the other end of the casing 3. After the displacement sensor group chain 1 is assembled, remove the traction mechanism 4 from the displacement sensor group chain 1.

[0032] like Figure 7-8 As shown, a positioning groove 32 is provided at the edge of the tube opening of the sleeve 3. After the displacement sensor assembly chain 1 is assembled, the acceleration sensor 11 is snapped into the positioning groove 32 through the first buckle 6 to prevent the acceleration sensor 11 from moving in the sleeve 3. Preferably, a positioning groove 32 can be provided at both ends of the tube opening of the sleeve 3.

[0033] End caps are provided at both end ports of the sleeve 3 to prevent leakage from entering through the ports.

[0034] After the displacement sensor chain 1 is installed, an "L"-shaped small prism 5 is installed at the end of the sleeve 3 away from the data collector 8 as a reference point observation mark.

[0035] A second buckle 7 is provided on the periphery of the casing 3. According to the hydrogeological characteristics of the site area, the construction plan of the mine excavation method and the requirements of the array displacement sensing technology principle, a ring installation method is adopted to fix the displacement sensing chain 1 along the arch shape of the tunnel through the second buckle 7 tightly on the arc surface of the tunnel section.

[0036] The casing 3 includes a plurality of casing 3 units, and the plurality of casing 3 units are fixedly connected by screws. The joints of adjacent casing 3 units are sealed by sealing glue or sealing tape, and the pipe joints are reinforced by multiple sealing with screws, sealing glue, and sealing tape to ensure that no leakage occurs.

[0037] like Figure 1 As shown, the monitoring device of the utility model can also include a server and a monitoring platform. The data collector 8 sends the received data to the server through the second wireless transmission module, and the server sends the data to the monitoring platform for display. The second wireless transmission module is preferably a 4G communication module.

[0038] The utility model can realize the real-time automatic monitoring of the displacement of the tunnel vault settlement and the clearance convergence, collect the monitoring data of each measuring point at different times, and calculate the change value of the tunnel displacement deformation through two measurement values, and compare it with the initial value to calculate the cumulative value of the displacement deformation. When the real-time detection value of the tunnel section displacement change reaches the warning value, the monitoring personnel of the construction unit are notified immediately to investigate and intervene in the tunnel construction status. At the same time, the monitoring point is manually reviewed as soon as possible, and the stability of the benchmark point and the monitoring point is checked.

[0039] The utility model is based on three-axis acceleration sensing technology, and can accurately measure the spatial acceleration of the measured object in a scenario where the moving direction of the measured object is not known in advance, and has the advantages of small size, light weight, high precision and low energy consumption. Through appropriate design for the mining construction scenario, the displacement sensor group chain 1 can be arranged in the soil between the underground structure and the surface in a horizontal or inclined manner, and the displacement and settlement information of the soil can be obtained intuitively and accurately, and the needs of automatic dynamic monitoring and early warning can be realized through automatic data acquisition and wireless transmission functions.

[0040] The implementation methods of the utility model are not limited to this. According to the above content of the utility model, by using common technical knowledge and customary means in the field, without departing from the above basic technical ideas of the utility model, the utility model can also make other various forms of modification, replacement or combination, all of which fall within the scope of protection of the utility model.

Claims

1. A tunnel section convergence displacement monitoring device, characterized in that: It includes a displacement sensor chain and a data collector, the displacement sensor chain includes a plurality of acceleration sensors, each of the acceleration sensors is configured with a first wireless transmission module, the plurality of acceleration sensors are connected in series through flexible joints, the plurality of acceleration sensors are electrically connected to the data collector through their respective first wireless transmission modules, the data collector is arranged at one end of the displacement sensor chain, a sleeve is arranged on the periphery of the displacement sensor chain, and a detachable traction mechanism is arranged at one end of the displacement sensor chain away from the data collector.

2. The tunnel section convergence displacement monitoring device according to claim 1, characterized in that: A slide groove is arranged inside the sleeve, and a pulley is arranged at one end of the displacement sensor group chain away from the data collector, and the pulley is aligned with the slide groove for installation.

3. The tunnel section convergence displacement monitoring device according to claim 1 or 2, characterized in that: The traction mechanism comprises a clamping part, a traction rope and a gravity ball. The clamping part is detachably connected to the end of the displacement sensor group chain. One end of the traction rope is fixedly connected to the clamping part, and the other end of the traction rope is fixedly connected to the gravity ball.

4. The tunnel section convergence displacement monitoring device according to claim 3 is characterized in that: A positioning groove is provided on the edge of the tube opening of the sleeve, and the acceleration sensor is clamped into the positioning groove through a first buckle.

5. The tunnel section convergence displacement monitoring device according to claim 1, characterized in that: End covers are provided at both end ports of the sleeve.

6. The tunnel section convergence displacement monitoring device according to claim 5, characterized in that: A prism is installed at a port at one end of the sleeve away from the data collector.

7. The tunnel section convergence displacement monitoring device according to claim 1, characterized in that: A second buckle is arranged on the periphery of the sleeve.

8. The tunnel section convergence displacement monitoring device according to claim 1, characterized in that: The sleeve comprises a plurality of sleeve units, and the plurality of sleeve units are fixedly connected by screws.

9. The tunnel section convergence displacement monitoring device according to claim 8, characterized in that: The joints between adjacent sleeve units are sealed by sealing glue or sealing tape.

10. The tunnel section convergence displacement monitoring device according to claim 1, characterized in that: The monitoring device also includes a server, and the data collector sends the received data to the server via the second wireless transmission module.

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