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Karst tunnel biaxial loading test device and test method

A test device and test method technology, applied in the direction of measuring device, using stable tension/pressure test material strength, instruments, etc., to achieve high safety factor, facilitate observation of the inside of the test, and not easy to break instantly

Pending Publication Date: 2020-08-07
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a biaxial loading test device and test method for karst tunnels. The present invention can predict the problems that may be encountered in the actual excavation process by simulating the excavation of karst tunnels

Method used

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  • Karst tunnel biaxial loading test device and test method
  • Karst tunnel biaxial loading test device and test method
  • Karst tunnel biaxial loading test device and test method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A karst tunnel biaxial loading test device comprises a base 1, a table 2 is laterally arranged on the upper end of the base 1, a frame 3 is arranged on the table 2, and a plurality of turbine screw lifts 4 are arranged on the upper side and left and right sides of the frame 3, and the turbine The telescopic end of the screw lift 4 is located in the frame 3, and the telescopic end of the turbine screw lift 4 is connected to the pressure plate 5. The two sides of the pressure plate 5 are provided with guide rods 6, and the other end of the guide rod 6 passes through the frame 3 and can pass through the frame 3. Sliding up and down, the front side and rear side of the frame 3 are connected with a surrounding steel plate 7, a glass plate 8 is embedded on the surrounding steel plate 7, and a number of reserved water injection holes 9 are vertically arranged in the middle of the front side glass plate 8, The reserved water injection hole 9 is provided with a tightened first bo...

Embodiment 2

[0035] Preferably, a pressure sensor 15 is provided between the turbine screw lift 4 and the pressure plate 5 , and the pressure sensor 15 is connected to a pressure digital display 18 .

[0036] Setting the pressure sensor 15 between the turbine screw lift 4 and the pressure plate 5 can monitor the loading force of the turbine screw lift 4 and display it in real time through the pressure digital display 18 so as to make adjustments according to the situation.

[0037] Other structures of this embodiment are the same as those of Embodiment 1.

Embodiment 3

[0039] Preferably, the enclosure steel plate 7 and the frame 3 are connected by third bolts 16 .

[0040] The enclosure steel plate 7 is connected with the frame 3 through the third bolt 16, and the various parts of the test device are integrated into a whole, which increases the overall stability and ensures the test effect.

[0041] Other structures of this embodiment are the same as those of Embodiment 1.

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Abstract

The invention provides a karst tunnel biaxial loading test device and test method. According to the karst tunnel biaxial loading test device and test method, possible problems in a real excavation process can be predicted through simulated excavation; a plurality of turbine lead screw lifters are arranged on the upper side, the left side and the right side of a frame; the telescopic ends of the turbine screw lifters are connected with pressing plates; the front side face and the rear side face of the frame are connected with fence steel plates; glass plates are embedded in the fence steel plates; a plurality of reserved water injection holes are vertically formed in the middle of the glass plate on the front side face; and a semicircular glass sealing plate is arranged on the glass plate on the lower sides of the reserved water injection holes; a plurality of parallel bolt holes are vertically formed in the fence steel plates on the two sides of the glass plates; a fastening steel baris arranged between the left bolt holes and the right bolt holes; and the two sides of the fastening steel bar are connected with the bolt holes through second bolts. With the test device and test method of the invention adopted, the real stress state of a karst tunnel can be restored through two-way loading, defects and deficiencies of related experiences in an actual karst tunnel excavation process are found in advance, and life and property losses are prevented.

Description

technical field [0001] The invention relates to the technical field of karst tunnel tests, in particular to a karst tunnel biaxial loading test device and a test method. Background technique [0002] Tunnels are engineering structures buried in the ground, and it is a form of human utilization of underground space. With the continuous development of tunnel construction in my country, the difficulty of tunnel construction has gradually increased, and the factors to be considered are also increasing, including terrain, buried depth, geological structure, and karst caves. At present, although drilling sampling or geological surveys have been carried out before the excavation of karst tunnels, most of them still cannot avoid the problem of water inrush or collapse during the actual excavation process because of the interaction mechanism between the karst cave and the tunnel. Insufficient understanding, therefore, there is an urgent need for a test device and method that can sim...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/08G01N3/02
CPCG01N3/12G01N3/08G01N3/02G01N2203/0003G01N2203/0019G01N2203/0048G01N2203/0067G01N2203/023G01N2203/0246G01N2203/0298G01N2203/0254G01N2203/0641G01N2203/0682
Inventor 林志斌张勃阳王兴国杨大方郭佳奇方瑾谨
Owner HENAN POLYTECHNIC UNIV
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