In-situ square sample acquisition device and method for bond contact test of surrounding rock and a shotcrete layer

US11648707B2 · kind B2 · utility

Assignee

• Changjiang River Scientific Research Institute of Changjiang Water Resources Commission · CN

Inventors

• Xiuli Ding · 红钢城街道, CN
• Shuling Huang · Meishan City, CN
• Yang Qin · Menlo Park, US
• Yuting Zhang · Chengdu, CN
• Zhiyang Gao · Qingdao, CN
• Dengxue Liu · 红钢城街道, CN
• Jun He · Miaocheng, CN

Key dates

• Filing date: Nov 30, 2020
• Grant date: May 16, 2023
• Expiry date: Aug 26, 2041

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N33/24
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An in-situ square sample acquisition device and method for a bond contact test of a surrounding rock and a shotcrete layer are provided, the device includes a supporting shell, a fixing structure, hollow adjusting bolts and two borehole positioning frames, a guide hole is provided in a middle of the supporting shell, the frames are slidably fit in the guide hole, a plurality of positioning holes are provided in side walls of each of the frames, and the positioning holes in different frames are distributed in a staggered manner, four corners of the supporting shell are connected with four hollow adjusting bolts respectively, one end of each of the hollow adjusting bolts is fixedly provided with an adjusting nut, four fixing lugs are provided in four corners of each frame respectively, and the fixing structure includes four connecting bolts and four nuts.