A tunnel deep shaft surrounding rock pressure testing device

Abstract

The utility model relates to tunnel construction technical field, concretely disclose a kind of tunnel deep vertical shaft country rock pressure testing device, including reinforcing framework, reinforcing framework is located in deep vertical shaft country rock, reinforcing framework bottom is provided with support device, support device is located in tunnel, reinforcing framework top is equipped with settlement monitoring device, settlement monitoring device is used to monitor the settlement of reinforcing framework, reinforcing framework is equipped with multiple strain sensors inside.The utility model has the beneficial effect that when deep vertical shaft country rock is deformed by pressure, reinforcing framework can play the role of supporting protection, strain sensor can monitor whether reinforcing framework is deformed, so as to test the pressure suffered by vertical shaft country rock, support device can stably support reinforcing framework, prevent reinforcing framework settlement and cause strain sensor to deviate, when reinforcing framework settlement occurs, displacement sensor can alarm.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a device for testing the surrounding rock pressure of deep vertical shaft tunnels. Background Technology

[0002] For deep vertical shafts, the distribution of surrounding rock pressure and the stress state of the shaft wall structure are significantly different from those of railway tunnels. In addition, deep vertical shafts are buried at great depths, have complex geological environments, and pose high construction safety risks. Therefore, it is even more necessary to test the stress of the shaft wall structure to verify the support effect of the shaft wall structure, provide a basis for adjusting structural parameters, and ensure construction safety and the long-term stability of the shaft wall structure.

[0003] Current technologies for testing the surrounding rock pressure in deep vertical shafts typically involve deploying sensors on the inner wall of the surrounding rock. These sensors monitor the rock pressure, and excessively large fluctuations in the sensor readings indicate instability in the surrounding rock. While this method achieves pressure testing, the sensor mounting brackets are prone to settlement along with the surrounding soil. When these brackets settle and deform, the rock pressure test results become inaccurate. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a test device for the surrounding rock pressure of deep vertical shaft tunnels.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A test device for testing the surrounding rock pressure of a deep vertical shaft tunnel includes a reinforced frame located within the surrounding rock of the deep vertical shaft. A support device is installed at the bottom of the reinforced frame and located inside the tunnel. A settlement monitoring device is installed at the top of the reinforced frame to monitor the settlement of the reinforced frame. The reinforced frame contains multiple strain sensors.

[0007] Preferably, the reinforcing frame includes an upper support ring and a lower support ring arranged coaxially, and multiple columns are fixedly connected between the upper support ring and the lower support ring.

[0008] Preferably, multiple arc-shaped support rods are fixedly connected between two adjacent columns.

[0009] Preferably, the support device consists of three support rings fixed to the inner wall of the tunnel. The middle support ring is fixed to the lower support ring by a fixing block, and the tops of the two side support rings are fixedly connected to crossbeams, one end of which is fixed to the lower support ring.

[0010] Preferably, the settlement monitoring device includes a fixed beam, a slidably connected rod on the upper side of the fixed beam, a displacement sensor mounted on the upper side of the fixed beam, the displacement sensor being correspondingly set with the rod, and the lower end of the rod being fixed to the reinforcing frame.

[0011] Preferably, a protective sleeve is provided inside the reinforced frame.

[0012] The beneficial effects of this utility model are as follows: when the surrounding rock of a deep vertical shaft is deformed under pressure, the reinforced frame can play a supporting and protective role. The strain gauge sensor can monitor whether the reinforced frame has deformed, thereby testing the pressure on the surrounding rock of the shaft. The support device can provide stable support for the reinforced frame and prevent the strain gauge sensor from shifting due to the settlement of the reinforced frame. When the reinforced frame settles, the displacement sensor can issue an alarm. Attached Figure Description

[0013] Figure 1 This is an installation state diagram of this utility model;

[0014] Figure 2 yes Figure 1 Cross-sectional view;

[0015] Figure 3 This is an exploded view of the basic structure of this utility model;

[0016] Figure 4 This is a basic structural diagram of the reinforced skeleton. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] like Figures 1-4 As shown in the figure, a tunnel deep shaft surrounding rock pressure testing device of this embodiment includes a reinforced frame 3, which is located within the deep shaft surrounding rock 200. The reinforced frame 3 includes an upper support ring 31 and a lower support ring 32 arranged coaxially, and multiple columns 33 are fixedly connected between the upper support ring 31 and the lower support ring 32. Multiple arc-shaped support rods 34 are fixedly connected between adjacent columns 33. Multiple strain sensors are installed inside the reinforced frame 3. The strain sensors are installed inside the columns 33 and the arc-shaped support rods 34, and the installation method is prior art. The strain sensors are not shown in the figure. The upper support ring 31 is located at the top of the deep shaft surrounding rock 200, and the lower support ring 32 is located at the bottom of the deep shaft surrounding rock 200.

[0019] A support device 4 is installed at the bottom of the reinforced frame 3. The support device 4 is located inside the tunnel 100. The support device 4 consists of three support rings fixed to the inner wall of the tunnel 100. The middle support ring is fixed to the lower support ring 32 by a fixing block 35. The tops of the support rings on both sides are fixedly connected to a crossbeam 36. One end of the crossbeam 36 is fixed to the lower support ring 32.

[0020] The top of the reinforced frame 3 is equipped with a settlement monitoring device 2. A process trench 1 is set around the top of the surrounding rock 200 of the deep vertical shaft. The settlement monitoring device 2 is located in the process trench 1. The settlement monitoring device 2 is used to monitor the settlement of the reinforced frame 3. The settlement monitoring device 2 includes a fixed beam 21. A hanging rod 23 is slidably connected to the upper side of the fixed beam 21. A displacement sensor 22 is installed on the upper side of the fixed beam 21. The displacement sensor 22 is set correspondingly to the hanging rod 23. The lower end of the hanging rod 23 is fixed to the upper support ring 31.

[0021] In use, the reinforcing frame 3 is located within the surrounding rock 200 of the deep shaft to reinforce it. When the surrounding rock 200 is deformed under pressure, the reinforcing frame 3 provides support and protection. During this time, the reinforcing frame 3 also deforms. A strain gauge sensor installed within the reinforcing frame 3 can detect this deformation, thus measuring the pressure on the surrounding rock 200. The support device 4 provides stable support for the reinforcing frame 3. The support ring is located inside the tunnel and is annular, which greatly increases the supporting force on the reinforcing frame 3 and prevents settlement of the reinforcing frame 3 from causing the strain gauge sensor to shift. This effectively improves the accuracy of the pressure test. Simultaneously, when the reinforcing frame 3 settles, the boom 23 will inevitably move downwards. The displacement sensor 22 can monitor the displacement of the boom 23, triggering an alarm when the reinforcing frame 3 settles.

[0022] To prevent the strain gauge sensor from being damaged by impact during construction, a protective sleeve 5 is provided inside the reinforced frame 3 in this embodiment. The protective sleeve 5 can shield the strain gauge sensor. A mounting plate 51 is installed on the upper side of the protective sleeve 5. The mounting plate 51 is detachably fixed to the upper support ring 31. The detachable method is existing technology and will not be described in detail here.

Claims

1. A device for testing the surrounding rock pressure in a deep vertical shaft tunnel, characterized in that: The structure includes a reinforced frame (3), which is located within the surrounding rock (200) of the deep shaft. A support device (4) is installed at the bottom of the reinforced frame (3), which is located within the tunnel (100). A settlement monitoring device (2) is installed at the top of the reinforced frame (3), which is used to monitor the settlement of the reinforced frame (3). The reinforced frame (3) contains multiple strain sensors.

2. The tunnel deep vertical shaft surrounding rock pressure testing device according to claim 1, characterized in that: The reinforced frame (3) includes an upper support ring (31) and a lower support ring (32) arranged coaxially, and multiple columns (33) are fixedly connected between the upper support ring (31) and the lower support ring (32).

3. The tunnel deep vertical shaft surrounding rock pressure testing device according to claim 2, characterized in that: Multiple arc-shaped support rods (34) are fixedly connected between two adjacent columns (33).

4. The tunnel deep vertical shaft surrounding rock pressure testing device according to claim 2, characterized in that: The support device (4) consists of three support rings fixed to the inner wall of the tunnel (100). The middle support ring is fixed to the lower support ring (32) by a fixing block (35). The tops of the support rings on both sides are fixedly connected to a crossbeam (36), and one end of the crossbeam (36) is fixed to the lower support ring (32).

5. The tunnel deep vertical shaft surrounding rock pressure testing device according to claim 1, characterized in that: The settlement monitoring device (2) includes a fixed beam (21), a slidably connected rod (23) on the upper side of the fixed beam (21), a displacement sensor (22) is installed on the upper side of the fixed beam (21), the displacement sensor (22) is correspondingly set with the rod (23), and the lower end of the rod (23) is fixed to the reinforcing frame (3).

6. The tunnel deep vertical shaft surrounding rock pressure testing device according to claim 1, characterized in that: The reinforced frame (3) is equipped with a protective sleeve (5).

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