At present, there are mainly steel rule convergence meter contact method, total station non-contact method and three-dimensional laser scanning method. The contact method of steel ruler convergence meter is to measure the diameter of tunnel directly with steel ruler. Although the operation is simple, it is inefficient and easy to produce human errors; the non-contact method of total station is cumbersome in measuring steps, each station needs to be adjusted, and is affected by complexity and light environment, so it is not easy to operate; Although the three-dimensional laser scanning method is convenient for measurement and high precision, it is expensive, high maintenance cost and poor equipment durability. Therefore, there are still some problems and key technologies in the current method of measuring the displacement convergence of two sides of underground tunnel.
summary of the invention
The invention relates to a belt pulling rope Displacement sensor The device and method for measuring the convergence deformation of the two sides of the tunnel.
The utility model relates to a test device for monitoring the convergence of two sides of an underground tunnel, which is characterized in that it consists of three parts, namely, the fixing device of displacement convergence measuring point on both sides of the tunnel, the deformation sensing device, and the displacement convergence data acquisition device; and the fixing device of the displacement convergence measuring point of the two sides of the tunnel includes a pulling rope Displacement sensor The fixing member 4 and the hook fixing member 5, Rope displacement sensor The installation position of fixing member 4 and hook fixing member 5 is used to ensure that the measuring point components of side walls on both sides are in the same horizontal line, Rope displacement sensor 3 fixed in Rope displacement sensor On the fixed member 4, the deformation sensing device comprises Rope displacement sensor Connect the data acquisition instrument of hook No.2, No.8 and No.14 on the hook, and connect the data acquisition instrument of hook No.2, No.8 and No.14 on the hook.
The device is used to monitor the convergence of two sides of an underground tunnel Rope displacement sensor Fixed component 4 and hook fixing component 5 shall establish fixed measuring points on tunnel side wall I. the positions of installation of side wall measuring point components on both sides shall be leveled and at the same horizontal line to ensure the same fixed position and good fixation Rope displacement sensor 3. Hang the hook 8 on the hook fixed point 13, and then connect the data line 7 of the acquisition instrument to the port 14 of the acquisition instrument, open the switch of the acquisition instrument to read the displacement data, and then close the acquisition instrument after reading the data, remove the sensor and retract the remaining stay wire to complete the measurement of convergence deformation of the two sides of the tunnel.
Test system hook 8 and Rope displacement sensor Bearing 9 and hook support 12 are made of stainless steel, which can avoid the influence of corrosion during the test.
Description of drawings
Figure 1 cross section of tunnel convergence monitoring
Figure 2 Rope displacement sensor Top view of fixed member 4
Figure 3 Rope displacement sensor Left elevation of fixed component 4
Fig. 4 top view of hook fixing member 5
Fig. 5 right elevation of hook fixing device component 5
Among them, 1. Tunnel side wall; 2. Acquisition instrument; 3. Guyed displacement sensor; 4. Fixed component of Guyed displacement sensor; 5. Fixed component of hook; 6. Steel wire guyed wire; 7. Data line of acquisition instrument; 8. Hook; 9. Support of Guyed displacement sensor; 10. Fixed screw hole; 11. Fixing screw of support; 12. Hook support; 13. Hook fixing point; 14. Collector port
Specific implementation mode
On the side wall I of the tunnel, the support fixing screws 11 are used to connect the Rope displacement sensor The fixing member 4 and the hook fixing member 5 are fixed, and Rope displacement sensor 3. Screw the fixing screw hole 10 to the Rope displacement sensor Support 9. Rope displacement sensor 3 is connected to the hook 8 through the steel wire stay wire 6, and the hook 8 is hung at the hook fixed point 13 of the hook support 12. The acquisition instrument 2 is placed near the measuring point, and the data line 7 of the acquisition instrument is connected to the port 14 of the acquisition instrument to form a complete measurement system.
The section diagram of tunnel convergence monitoring is shown in Figure 1. Tunnel side wall 2. Acquisition instrument 3 Rope displacement sensor four Rope displacement sensor Fixed component 5. Hook fixed component 6. Steel wire stay wire 7. Data line of acquisition instrument 8. Hook 14. Collector port.
The top view and left elevation of the cable displacement meter fixing device 4 are shown in Fig. 2 and Fig. 3 Rope displacement sensor
8. Hook 9 Rope displacement sensor Support 10. Fixing screw hole 11. Support fixing screw.
The top view and right elevation of the hook fixing member 5 are shown in Fig. 4 and Fig. 5.
This method is a fast and convenient method to monitor the displacement of the two sides of the tunnel by setting up fixed special measuring components on both sides of the tunnel and using the guyed displacement measuring device to monitor the displacement of the two sides of the tunnel
1. Convenient and fast: the special measuring components for fixing the two sides of the tunnel are small in size, easy to install and can be produced in large quantities. The two sides of the tunnel can be arranged arbitrarily according to the needs; Rope displacement sensor And the data acquisition instrument is small in size, easy to disassemble, convenient to carry, and convenient to measure.
2. High precision, accurate positioning: Rope displacement sensor The accuracy can reach 0.01mm, and the range is 500-1000mm. Since the fixed special measuring components are permanently fixed on the two sides of the tunnel, each time the measurement is carried out Rope displacement sensor And hook can be fixed in the same position to ensure the uniqueness of measurement point, ensure accurate positioning and reliable data.
3. Reliable performance and durable equipment Rope displacement sensor The data acquisition instrument has a built-in battery, which can ensure the reliability and stability of data acquisition, and the durability of the equipment is high. Due to the fixed measuring points, the data acquisition instrument is easy to carry, Rope displacement sensor After measuring the displacement, it can be removed, and then re installed when the next measurement, which improves the reuse rate of the equipment.
Therefore, the measurement device and method can accurately measure the displacement convergence of the two sides of the underground tunnel, and the measurement data accuracy is high, and the results are accurate and reliable.