公开(公告)号：US20170306757A1

公开(公告)日：2017-10-26

申请号：US15323284

申请日：2016-04-21

Applicant: SHANDONG UNIVERSITY

Inventor： Shucai LI ,  Lichao NIE ,  Bin LIU ,  Haidong LIU ,  Yuxiao REN ,  Jie SONG ,  Zhengyu LIU ,  Qian GUO ,  Chuanwu WANG

IPC: E21D9/00 ,  E21D9/06

CPC classification number: E21D9/003 ,  E21D9/004 ,  E21D9/0621 ,  E21D9/0692 ,  G01V3/08 ,  G01V3/26 ,  G08C15/10 ,  G08C23/04

Abstract: A shield-carried noncontact frequency-domain electrical real-time advanced detection system and method. Noncontact electrodes are installed on a cutter head of a shield tunneling machine, current is emitted and received using capacitance coupling, the electrodes are connected to a host via a multi-way swivel joint, measured data is inversed and interpreted in real time, and the prediction result is transmitted to a control system of the shield tunneling machine so as to provide a technical support for safety construction of the shield tunneling machine; the noncontact electrodes are installed on the shield cutter head. Real-time advanced detection of geology in front of a tunnel face can be realized in the tunneling process, so that the requirement for quick tunneling construction is met, and the efficiency of advanced geological detection of the shield tunneling machine is improved; and an electrode system is only installed on the cutter head.

公开(公告)号：US20230384473A1

公开(公告)日：2023-11-30

申请号：US18031715

申请日：2021-10-15

Applicant: SHANDONG UNIVERSITY ,  SHANDONG HI-SPEED GROUP CO., LTD.

Inventor： Lichao NIE ,  Lei CHEN ,  Yong ZHOU ,  Chuan WANG ,  Xinji XU ,  Jian LI ,  Zhengyu LIU ,  Ning ZHANG ,  Peng BAI ,  Yongheng ZHANG ,  Dongdong XIE

IPC: G01V3/38 ,  G01V3/02

CPC classification number: G01V3/38 ,  G01V3/02

Abstract: A method and system for advanced detection and optimization of tunnel resistivity based on depth resolution. The method includes integrating all acquired electrode measurement data into comprehensive set, calculating its model resolution matrix, and selecting plurality of electrode measurement data from comprehensive set to form initial set; adding measurement data of electrodes that are not in initial set to initial set to form plurality of temporary subsets; calculating depth resolution balance goodness function of temporary subset according to model resolution matrix, selecting temporary subset with optimal value of depth resolution balance goodness function as new initial set, and determining whether average relative model resolution of initial set meets optimization requirements; if requirements are not met, continuously updating temporary subset, otherwise outputting initial set; determining number and position of tunnel face measurement electrodes according to updated initial set, and obtaining effective observation mode of advanced detection of optimized borehole resistivity.