In-situ shear test device for holes in rock-soil mass

Patent metadata

Field	Value
Publication number	US-12124000-B2
Application number	US-202318536288-A
Country	US
Kind code	B2
Filing date	Dec 12, 2023
Priority date	Jan 29, 2023
Publication date	Oct 22, 2024
Grant date	Oct 22, 2024

Abstract

An in-situ shear test device for holes in rock-soil mass include an axial loading system, a cutting power system, a rotation system, an upper cutterhead control system, a shear test system, and a lower cutterhead control system, which belongs to the field of geotechnical engineering and geological engineering technology. The device can accurately obtain the in-situ shear strength parameters in the hole of rock and soil, improve the engineering design level, and ensure the safety and stability of the project. The device adopts an in-situ shear test device in the hole of rock and soil mass with the above structure, which can solve the problems of difficulty in in-situ shear test for the holes in deep rock-soil mass, lack of test device, difficulty in radial test, difficulty in loading while shearing, and difficulty in multi-point in-situ test.

First claim

What is claimed is:

1. An in-situ shear test device for holes in rock-soil mass, comprising an axial loading system, a cutting power system, a rotation system, an upper cutterhead control system, a shear test system, and a lower cutterhead control system;
the axial loading system includes a lower pressure cylinder, a cover plate is arranged above the lower pressure cylinder, and a reaction plate is arranged below the lower pressure cylinder;
the cutting power system includes a main cutting motor, the main cutting motor is connected to a lower bottom plate through a bolt;
the rotating system includes a first shaft reducer, the first shaft reducer is connected to a drill pipe through a coupling, a lower part of the drill pipe is provided with a second shaft reducer, and an outer part of the second shaft reducer is provided with a first lifting nut;
the upper cutterhead control system includes a first solenoid valve controller, the first solenoid valve controller is connected to a first lower protective cover through the bolt, and an upper surface of the first lower protective cover is provided with a first drive motor, outer parts of the first solenoid valve controller and the first drive motor are covered by a first upper protective cover;
the shear test system includes an upper cutting tool and a lower cutting tool, the upper cutting tool is connected to an upper cutterhead through a blade shaft, and the lower cutting tool is connected to a lower cutterhead through the blade shaft, a pressure block is arranged between the upper cutterhead and the lower cutterhead, and a scissor-type telescopic structure is arranged inside the pressure block, the scissor-type telescopic structure is connected to the pressure block through a shaft;
the lower cutterhead control system includes a second solenoid valve controller, an upper surface of the second solenoid valve controller is provided with the bolts, a side of the second solenoid valve controller is provided with a fixed bracket, the second solenoid valve controller is connected to a second upper protective cover through the bolt and the fixed bracket, the second upper protective cover is provided with a second drive motor, and a second lower protective cover is provided below the second upper protective cover;
pressure sensors are arranged on the upper cutting tool, the lower cutting tool, and the pressure block.

2. The in-situ shear test device according to claim 1 , wherein a positioning flange is arranged on an upper surface of the cover plate, a limit column with limit and unloading rebound effect is arranged between the cover plate and the reaction plate, and a position limit screw and a spring are arranged inside the limit column; an outer part of the lower pressure cylinder is provided with a connecting plate, and the lower pressure cylinder is connected to the cover plate through the connecting plate.

3. The in-situ shear test device according to claim 1 , wherein the main cutting motor is surrounded by support rods, and two ends of each of the support rods are connected to the reaction plate and a lower bottom plate respectively.

4. The in-situ shear test device according to claim 1 , wherein the first shaft reducer and the coupling are covered by a circuit slip ring, and a bottom end of the drill pipe is provided with a bearing.

5. The in-situ shear test device according to claim 1 , wherein a center of the first upper protective cover is provided with a first upper protective cover reserved hole, and a center of the first lower protective cover is provided with a first lower protective cover reserved hole.

6. The in-situ shear test device according to claim 5 , wherein a center of the upper cutterhead is provided with an upper reserved hole, and an outer part of the upper reserved hole is provided with a first cutting gear, an outer part of the first cutting gear is provided with a first tool gear, and the first cutting gear is connected to the upper cutting tool through the first tool gear, a center of the lower cutterhead is set with a lower reserved hole, an outer surface of the lower reserved hole is set with a second cutting gear, the outer surface of the second cutting gear is set with a second tool gear, and the second cutting gear is connected to the lower cutting tool through the second tool gear.

7. The in-situ shear test device according to claim 6 , wherein a top and a bottom of the scissor-type telescopic structure are provided with a second lifting nut, and the second lifting nut is connected to the first lifting nut.

8. The in-situ shear test device according to claim 6 , wherein a center of the second upper protective cover is provided with a second upper protective cover reserved hole, and a center of the second lower protective cover is provided with a second lower protective cover reserved hole.

9. The in-situ shear test device according to claim 8 , wherein the drill pipe passes through the first upper protective cover reserved hole, the first lower protective cover reserved hole, the upper reserved hole, the lower reserved hole and the second upper protective cover reserved hole, and the drill pipe is connected to the second lower protective cover reserved hole through a bearing.

10. The in-situ shear test device according to claim 7 , wherein two ends of the second shaft reducer are connected to the upper reserved hole and the lower reserved hole respectively through the first lifting nut and the second lifting nut.

Assignees

• Changan Univ
• Inst Geographic Sciences & Natural Resources Res Cas

Inventors

• Lan hengxing
• Lan Mervyn
• Sun Weifeng
• Liang Qinyuan
• Li Langping
• Wu Yuming
• Yan Changgen

Classifications

• E21B4/04

  Electric drives (E21B4/12 takes precedence) · CPC title

• E21B10/32 Primary

  with expansible cutting tools · CPC title

• G01V99/00 Primary

  Subject matter not provided for in other groups of this subclass · CPC title