ROTARY FRICTION COEFFICIENT MEASUREMENT METHOD AND SYSTEM BASED ON ANNULAR LOADING

WIPO Patent Application WO/2024/060380

A1

Disclosed in the present invention are a rotary friction coefficient measurement method and system based on annular loading. The method comprises: measuring and determining a position to be tested and measured, drilling a hole by means of a rotary drilling rig to a designed elevation or a bedrock position to be measured, and cleaning the hole to ensure that no sludge is present at the bottom of the hole; mounting an annular loading module at the bottom of the rotary drilling rig, and lowering a rotary drilling bit to sink the annular loading module to the surface of said bedrock position; applying vertical pressures to the annular loading module in a graded mode by means of a vertical pressurizing module, measuring values of the applied vertical pressures by means of a vertical pressure measurement module, and measuring a settlement value of a rotary drilling rod by means of a rotary drilling rod settlement amount measurement module; applying torque loads to the annular loading module in a graded mode, and monitoring and obtaining torque values by means of a torque load measurement module; repeatedly carrying out single-point annular loading module torsional friction coefficient measurement tests multiple times under different vertical pressures, and substituting into a rock mass friction coefficient calculation formula for a rock mass bearing stratum to obtain a rock mass friction coefficient value of a rock mass bearing stratum to be measured. The test cost is low, and the safety is high.

WO/2004/036208	METHOD AND DEVICE FOR DETERMINING THE SHEEN OF RICE
JP2002104158	ROAD SURFACE FRICTIONAL STATE CALCULATING DEVICE, TIRE TYPE DETERMINING DEVICE, TIRE ABRASION DETERMINING DEVICE, ROAD SURFACE GRADIENT ESTIMATING DEVICE, AND OFFSET CORRECTING DEVICE OF ACCELERATION SENSOR

CUI BING (CN)
FENG LIANGPING (CN)
CAO SANHUA (CN)
GUO CHAO (CN)
FU BAIYONG (CN)
SHI HAIYANG (CN)
CAO XIN (CN)
HAN DONGDONG (CN)
GUAN WEIDONG (CN)
LI YANDE (CN)
LI WEI (CN)
SHI QILONG (CN)
YANG YE (CN)

PCT/CN2022/131578

March 28, 2024

November 13, 2022

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CCCC HIGHWAY BRIDGES NATIONAL ENGINEERING RES CENTRE CO LTD (CN)
CCCC HIGHWAY CONSULTANTS CO (CN)
ZHEJIANG ETONE SPECIALIZED FOUND ENGINEERING CO LTD (CN)

G01N19/02; E02D33/00

CN115217166A	2022-10-21
CN104345028A	2015-02-11
CN112014009A	2020-12-01
CN114965251A	2022-08-30
JP2022085980A	2022-06-09
KR20210025854A	2021-03-10
US4640118A	1987-02-03

WUHAN ZHIBOLE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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