A casting device for direct shear test of cylindrical rock core with joint surface and its application method

By designing a device including casting mold, positioning device, clamping device and pressing box, the problem of joint surface deviation in the joint rock mass direct shear test is solved, and the precise fixation of the joint surface and the shear surface of the test piece is achieved, which improves the accuracy of the test results.

CN114894594BActive Publication Date: 2025-03-25CHINA MINMETALS CHANGSHA MINING RES INST +1
3 Cites 0 Cited by

Patent Information

Application Number
CN202210578443.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-05-25
Publication Date
2025-03-25
Estimated Expiration
2042-05-25

AI Technical Summary

Technical Problem

In the current direct shear test of jointed rock mass, the joint surface of the core test piece is prone to deviation during the pouring and fixing process, resulting in inaccurate test results.

Method used

A casting device containing a jointed cylindrical core direct shear test is designed, including a casting mold, a positioning device, a clamping device and a press box. Through the precise positioning of the specimen clamp and positioning sheet of the positioning device, combined with the telescopic rod of the clamping device, the joint surface of the specimen overlaps with the splicing surface of the casting mold, and avoids deviations in the joint surface.

Benefits of technology

The device can accurately cast and fix core specimens of different joint surface angles, lengths and shapes to ensure that the joint surface and shear surface coincide in the straight shear test, and improve the accuracy of the test results.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a casting device for direct shear test of cylindrical core with joints and an application method thereof, the device comprises a casting mold, a positioning device, a clamping device and a pressing box; the casting mold is a top-to-bottom symmetrical structure, comprising a lower half shell and lower half sealing plates at both ends, an upper half shell and upper half sealing plates at both ends; the positioning device comprises a specimen clamp and a positioning piece symmetrically and rotatably connected to its outer wall, the specimen clamp is detachably fixed to the middle position in the length direction of the specimen, the positioning piece is arranged along the axial direction of the casting mold, and the outer end can be overlapped on the lower half sealing plate; the clamping device is a linear telescopic device, the outer ends of the two sets of clamping devices can slide circumferentially along the inner wall of the casting mold, and the inner ends are respectively pressed against the end face center position of the cylindrical core specimen; the pressing box is a top-to-bottom symmetrical structure fitted outside the casting mold. It can accurately position, cast and fix specimens with different joint angles, different lengths and different shapes, prevent the specimens from affecting the direct shear results due to position deviation, and improve the test accuracy.
Need to check novelty before this filing date? Find Prior Art