Long-distance rock jacking pipe frictional resistance calculation method and pipe rock contact state detection method

• Main Authors: ZHOU XIAOHAN, YAN RU, DENG ZHIYUN, CHEN PENG, HAN YAFENG, DU LIBING, ZHONG ZULIANG, REN LIANXI, LIU XINRONG, LIANG NINGHUI
• Format: Patent
• Language: Chinese; English
• Published: 10.11.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides a long-distance rock jacking pipe frictional resistance calculation method and a pipe rock contact state detection method, and the method comprises the steps: firstly collectingconstruction parameters, and then calculating the frictional resistance borne by a pipe joint and surrounding rock in different contact states through employing frictional resistance calculation models corresponding to different contact states according to the collected construction parameters. Therefore, the corresponding pipe joint unit length friction threshold ranges under different pipe rockcontact states are determined. In the actual construction process, the actual measurement value of the frictional resistance borne by the jacking pipe can be determined by detecting the jacking forceof the pipe jacking machine and the resistance of the machine head, and the contact state of the pipe joint and surrounding rock is determined by comparing the actual measurement value with the frictional resistance threshold