A tunnel surrounding rock displacement measuring device

Abstract

The utility model discloses a tunnel construction field's tunnel surrounding rock displacement measuring device, include: installation arch, and the arc plate of tunnel arch ring camber matching, installation base is detachably connected through the lifting structure in the both sides end of installation arch, realizes the support to installation arch, measurement subassembly is equipped with several, several measurement subassembly sliding is established on the board surface of installation arch, and the extension direction of every measurement subassembly all passes through the center position of installation arch, and the measurement head of measurement subassembly is abutted on the tunnel inner wall, the utility model has the beneficial effects that: through the measurement subassembly sliding is established on the installation arch, makes the measurement point position and the measurement density of measurement subassembly all and carry out the adjustment, and the installation arch and installation base are detachably connected, make the device save more convenient.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction, specifically to a tunnel surrounding rock displacement measuring device. Background Technology

[0002] Tunnels are typically buried underground or traverse mountains, and are greatly affected by geological and hydrological conditions. Under the influence of external factors, tunnels may experience deformations such as subsidence and convergence. Once a tunnel collapse occurs, it not only poses a huge threat to the personal safety of construction workers, but also prolongs the tunnel construction period and increases the project budget. Therefore, it is necessary to monitor the settlement of the surrounding rock of the tunnel to understand the settlement situation so that timely countermeasures can be taken when the settlement exceeds the standard.

[0003] Most existing measuring devices are installed in tunnels by drilling and anchoring, which can damage the tunnel interior. Later, some frame-type measuring devices emerged, which are directly attached to the tunnel wall for monitoring. However, these devices may also have some problems: the structure is fixed, the measuring points are fixed, the measuring points cannot be adjusted, and they are not flexible enough.

[0004] Therefore, we propose a tunnel surrounding rock displacement measurement device. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this utility model provides a tunnel surrounding rock displacement measuring device.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows: A tunnel surrounding rock displacement measuring device includes: an arch, which is an arc-shaped plate with the same arc as the tunnel arch ring; a base, which is detachably connected to both ends of the arch via a lifting structure to support the arch; and a plurality of measuring components, which are slidably disposed on the plate surface of the arch, with the extension direction of each measuring component passing through the center of the arch, and the measuring head of the measuring component abutting against the inner wall of the tunnel.

[0007] This mounting base is designed to be detachably connected to the end of the mounting arch via a lifting structure. This facilitates storage after use and allows for easy replacement of different mounting arches for tunnels of varying specifications, making it more convenient to use in combination. The lifting structure allows for adjustment of the height of the mounting arch, ensuring that the measuring end of the measuring component contacts the tunnel wall. The measuring component is slidably mounted on the mounting arch, allowing for adjustment of the measuring position and the density of measuring points. This enables flexible adjustments for tunnel rock measurements at different stages of development.

[0008] Further defining the measurement components, the measurement assembly includes a measuring base, a displacement sensor, a through-bolt, a through-nut, and a washer; a sliding groove is formed on the plate surface of the mounting arch along its extension direction; the bottom surface of the measuring base has the same curvature as the mounting arch; the displacement sensor is vertically mounted on the top surface of the measuring base; the through-bolt is vertically fixed at the center of the bottom surface of the measuring base, and its outer diameter is clearance-fitted with the width of the sliding groove; the washer is inserted into the through-bolt inside the mounting arch; and the through-nut is threadedly connected to the through-bolt to fix the measuring base.

[0009] By creating a sliding groove on the mounting arch and setting the bottom surface of the measuring base to have the same curvature as the mounting arch, the measuring base and the mounting arch fit together more closely. The through-bolt slides in the sliding groove, and the shim on the through-bolt allows the through-nut to better fix the measuring component.

[0010] Further defined, the mounting base includes a base plate, rollers, uprights, and reinforcing rods; the base plate is rectangular, with its length direction being the same as the tunnel's length direction; the rollers are located at the four corners of the base plate; the uprights are vertically positioned at the center of the base plate; and the two ends of the reinforcing rods are connected to the uprights and the base plate respectively, with the reinforcing rods located along the tunnel's length direction.

[0011] By installing rolling wheels on the bottom surface of the base plate, it is easier to move the device. The installation of reinforcing rods along the length of the tunnel can enhance the strength of the uprights and prevent them from collapsing due to the weight of the arch.

[0012] Further specifying, the lifting structure includes a hydraulic telescopic rod, the bottom of which is fixedly connected to the top of the upright.

[0013] Furthermore, the mounting arch has a concave cross-section with the opening facing inward. Both ends of the mounting arch are equipped with sealing plates, and the top of the hydraulic telescopic rod is fixed with a connecting plate. The connecting plate and the sealing plate are respectively provided with connecting holes. The mounting arch is fixed to the connecting plate by bolts passing through the connecting holes. This makes the connection between the hydraulic telescopic rod and the mounting arch structure more stable.

[0014] Furthermore, a dust cover is fitted onto the piston rod of the hydraulic telescopic rod; this dust cover effectively prevents dust inside the tunnel from adhering to the piston rod and affecting its use.

[0015] The beneficial effects of this utility model are as follows: by sliding the measuring component on the mounting arch, the measuring points and measuring density of the measuring component can be adjusted evenly, and the mounting arch and the mounting base can be detachably connected, making the device easier to store. Attached Figure Description

[0016] Figure 1 This is a simplified structural diagram of the present invention from a frontal view. Figure 2A partial side view of the mounting base; Figure 3 Diagram showing the connection relationship between the arch and measuring components for frontal viewing angle; Figure 4 A partial side view of the arch being installed; Figure 5 A diagram showing the connection between the arch and the lifting structure when the dust cover is not installed, viewed from the front. Figure 6 A top-down view showing the connection status between the installation arch and the lifting structure.

[0017] The symbols for each component are as follows: Mounting arch 1, sealing plate 11, sliding groove 12, mounting base 2, base plate 21, rolling wheel 22, upright 23, reinforcing rod 24, lifting structure 3, connecting plate 31, dust cover 32, measuring component 4, measuring seat 41, displacement sensor 42, through screw 43, through nut 44, gasket 45. Detailed Implementation

[0018] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0019] Example: like Figures 1-6As shown, a tunnel surrounding rock displacement measuring device includes an installation arch 1, an installation base 2, a lifting structure 3, and a measuring component 4. The installation arch 1 is an arc-shaped plate with the same curvature as the tunnel arch. The cross-section of the installation arch 1 is concave with the opening facing inward. Sealing plates 11 are provided at both ends of the installation arch 1. The installation base 2 is detachably connected to both ends of the installation arch 1 via the lifting structure 3 to support the installation arch 1. The installation base 2 includes a base plate 21, rolling wheels 22, uprights 23, and reinforcing rods 24. The base plate 21 is rectangular, with its length along the tunnel's length direction. The rolling wheels 22 are located at the four corners of the base plate 21. The uprights 23 are vertically positioned at the center of the base plate 21. The two ends of the reinforcing rods 24 are connected to the uprights 23 and the base plate 21, respectively, and the reinforcing rods 24 are located along the tunnel's length direction. The lifting structure 3 includes a hydraulic telescopic rod. The bottom of the hydraulic telescopic rod is fixedly connected to the top of the upright 23, and a dust cover 32 is fitted onto the piston rod of the hydraulic telescopic rod. A connecting plate 31 is fixedly mounted on the top of the piston rod of the retracting rod. Connecting holes are correspondingly provided on the connecting plate 31 and the sealing plate 11. The mounting arch 1 is fixed to the connecting plate 31 by bolts passing through the connecting holes. Several measuring components 4 are provided, each slidingly mounted on the plate surface of the mounting arch 1, with its extension direction passing through the center of the mounting arch 1. The measuring head of the measuring component 4 abuts against the inner wall of the tunnel. The measuring component 4 includes a measuring seat 41, a displacement sensor 42, and a through-bolt 4. 3. Connecting nut 44 and washer 45; A sliding groove 12 is provided on the plate surface of the mounting arch 1 along its extension direction. The bottom surface of the measuring seat 41 has the same curvature as the mounting arch 1. The displacement sensor 42 is vertically installed on the top surface of the measuring seat 41. The connecting screw 43 is vertically fixed at the center of the bottom surface of the measuring seat 41, and its outer diameter is clearance-fitted with the width of the sliding groove 12. The washer 45 is inserted into the connecting screw 43 inside the mounting arch 1. The connecting nut 44 is threadedly connected to the connecting screw 43 to fix the measuring seat 41.

[0020] This mounting base 2 is detachably connected to the end of the mounting arch 1 via the lifting structure 3, facilitating storage after use and allowing for easy replacement of different mounting arches 1 for tunnels of different specifications. The lifting structure 3 allows for adjustment of the height of the mounting arch 1, ensuring the measuring end of the measuring component 4 contacts the tunnel wall. The measuring component 4 is slidably mounted on the mounting arch 1, allowing for adjustment of the measuring position and the density of measuring points, facilitating flexible adjustments for tunnel rock measurements at different stages. By creating a sliding groove 12 on the mounting arch 1, the bottom surface of the measuring base 41 is set to an arc surface with the same curvature as the mounting arch 1. This design ensures a closer fit between the measuring base 41 and the mounting arch 1. A through-bolt 43 slides within the sliding groove 12, and a washer 45 on the through-bolt 43 allows the through-bolt nut 44 to better secure the measuring component 4. Rolling wheels 22 on the bottom surface of the base plate 21 facilitate movement of the device. A reinforcing rod 24 positioned along the length of the tunnel enhances the strength of the upright 23, preventing it from collapsing due to the weight of the mounting arch 1. This makes the connection between the hydraulic telescopic rod and the mounting arch 1 more stable. A dust cover 32 on the piston rod effectively prevents dust from adhering to the piston rod and affecting its use.

Claims

1. A tunnel surrounding rock displacement measuring device, characterized in that, include: The arch (1) is an arc-shaped plate with the same curvature as the tunnel arch ring. The mounting base (2) is detachably connected to both ends of the mounting arch (1) via the lifting structure (3) to support the mounting arch (1); The measuring components (4) are provided in a plurality of them. The plurality of measuring components (4) are slidably disposed on the plate surface of the mounting arch (1), and the extension direction of each measuring component (4) passes through the center position of the mounting arch (1). The measuring head of the measuring component (4) abuts against the inner wall of the tunnel.

2. The tunnel surrounding rock displacement measuring device according to claim 1, characterized in that, The measuring assembly (4) includes a measuring seat (41), a displacement sensor (42), a through screw (43), a through nut (44), and a washer (45). A sliding groove (12) is provided on the plate surface of the mounting arch (1) along its extension direction. The bottom surface of the measuring seat (41) has the same curvature as the mounting arch (1). The displacement sensor (42) is vertically disposed on the top surface of the measuring seat (41). The through screw (43) is vertically fixed at the center of the bottom surface of the measuring seat (41), and its outer diameter is clearance-fitted with the width of the sliding groove (12). The washer (45) is inserted through the through screw (43) in the mounting arch (1). The through nut (44) is threadedly connected to the through screw (43) to fix the measuring seat (41).

3. The tunnel surrounding rock displacement measuring device according to claim 2, characterized in that, The mounting base (2) includes a base plate (21), rollers (22), uprights (23), and reinforcing rods (24). The base plate (21) is rectangular, and the length direction of the base plate (21) is the length direction of the tunnel. The rollers (22) are located at the four corners of the base plate (21). The uprights (23) are vertically located at the center of the base plate (21). The two ends of the reinforcing rods (24) are respectively connected to the uprights (23) and the base plate (21), and the reinforcing rods (24) are located in the length direction of the tunnel.

4. The tunnel surrounding rock displacement measuring device according to claim 3, characterized in that, The lifting structure (3) includes a hydraulic telescopic rod, the bottom of which is fixedly connected to the top of the upright (23).

5. A tunnel surrounding rock displacement measuring device according to claim 4, characterized in that, The mounting arch (1) has a concave cross section with an inward opening. The mounting arch (1) has sealing plates (11) at both ends. The top of the hydraulic telescopic rod is fixed with a connecting plate (31). The connecting plate (31) and the sealing plate (11) have corresponding connecting holes. The mounting arch (1) is fixed to the connecting plate (31) by bolts passing through the connecting holes.

6. The tunnel surrounding rock displacement measuring device according to claim 4, characterized in that, A dust cover (32) is fitted onto the piston rod of the hydraulic telescopic rod.

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