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公开(公告)号：US20240346215A1
公开(公告)日：2024-10-17
申请号：US18597869
申请日：2024-03-06
Inventor： Shili QIU , Shaojun LI , Zhenkun XIE , Quan JIANG , Dingping XU , Hong ZHENG
Abstract: Disclosed is a method for designing parameters of an advance stress relief hole in a rockburst source zone of a construction tunnel in deep-seated hard rocks, including S1: classifying rockbursts in the TBM tunnel in the deep-seated hard rocks; S2: identifying a potential rockburst source zone of the TBM tunnel in the deep-seated hard rocks; S3: developing a scheme design and effect evaluation method for the parameters of the advance stress relief hole; S4: performing analysis to find a pattern in the parameters of the advance stress relief hole and optimizing the design; and S5: determining an optimal scheme for arranging the stress relief hole in accord with engineering practice.
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公开(公告)号：US12061113B1
公开(公告)日：2024-08-13
申请号：US18648321
申请日：2024-04-26
Inventor： Xianjun Tan , Weizhong Chen , Hongdan Yu , Hongming Tian , Jingqiang Yuan , Wusheng Zhao , Peichao Zheng
IPC: G01H17/00
CPC classification number: G01H17/00
Abstract: The present application discloses an intelligent frequency reading method applicable to a low-temperature environment and a wireless vibrating wire acquisition instrument. The intelligent frequency reading method includes the following steps: frequency pre-sweeping excitation: performing frequency pre-sweeping on a vibrating wire sensor by using the wireless vibrating wire acquisition instrument, if acquisition is successful, recording an acquisition frequency, and if the acquisition is not successful, entering frequency re-sweeping excitation, wherein the frequency re-sweeping excitation includes the following steps: primary voltage regulation: if the acquisition is not successful by the frequency pre-sweeping excitation, performing primary voltage regulation, increasing an excitation voltage until excitation is successful, and recording an excitation success voltage value; if the excitation is not successful by the primary voltage regulation, performing secondary voltage regulation, increasing the excitation voltage until the excitation is successful, and recording the excitation success voltage value.
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公开(公告)号：US11808914B2
公开(公告)日：2023-11-07
申请号：US18185462
申请日：2023-03-17
Applicant: Institute of Rock and Soil Mechanics, Chinese Academy of Sciences , South-Central Minzu University
Inventor： Shili Qiu , Ping Li , Shaojun Li , Hao Zhang , Dingping Xu , Quan Jiang
IPC: G01V8/10
CPC classification number: G01V8/10 , G01V2210/62
Abstract: The embodiment of the present application discloses a method and equipment for transformation of point cloud coordinates of structure plane of deep-buried tunnel based on a target device. Before performing laser scanning on a measured surface, the embodiment of the present application makes the third plate surface close to the measured surface by adjusting the target device, and makes the bubbles of the first circular level and the second circular level in a centered state; respectively extracting point cloud coordinates of the three cross targets from the point cloud data, and acquiring the first tendency of the third plate surface from the digital display of three-dimensional electronic compass; determining the second tendency of the third plate surface according to the point cloud coordinates; converting the coordinates in the point cloud data to geodetic coordinates according to the first tendency and the second tendency.
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64.发明公开公开(公告)号：US20230349799A1
公开(公告)日：2023-11-02
申请号：US18136536
申请日：2023-04-19
Inventor： Weizhong CHEN , Xianjun TAN , Chaoxuan ZHANG , Hongming TIAN , Yunlong GU , Xiaomei WANG , Zhengrong SHI
CPC classification number: G01N3/08 , G01N3/02 , G01N2203/0019 , G01N2203/0042 , G01N2203/006 , G01N2203/0262
Abstract: The present disclosure discloses a deformation and control simulation test system for a tunnel engineering supporting structure, including a follow-up hoisting platform, actuators, a control system. It is horizontal structure. The follow-up hoisting platform reduces the friction caused by the weight of testing sample and facilitates experimental operations. Each actuator fixed on an annular box body reaction frame can move independently through a control system in form of force control or displacement control mode, and can achieve circumferential contraction loading through its gomphodont configuration. The hinged and curved design of the cushion blocks of actuators can adapt to the circumferential contraction deformation of a test sample and maintain a close fit with them during the loading process. The present disclosure provides a good solution for physical model tests on deformation and control of tunnel engineering supporting structures including uniform loading, non-uniform loading, and long-term loading conditions.
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公开(公告)号：US11796513B2
公开(公告)日：2023-10-24
申请号：US17529697
申请日：2021-11-18
Inventor： Liu Liu , Shaojun Li , Quan Jiang , Yaxun Xiao , Guangliang Feng
CPC classification number: G01N29/075 , G01N29/07 , G01N29/4463 , G01N29/12 , G01N2291/011 , G01N2291/012 , G01N2291/0232 , G01N2291/0258 , G01N2291/0289 , G01N2291/044 , G01N2291/103 , G01N2291/2691
Abstract: A dual channel nondestructive testing method for a rock bolt and related devices includes: determining a target phase difference and an instantaneous phase difference of the first received signal and the second received signal; determining an integral instantaneous phase difference between the first received signal and the second received signal based on the target phase difference and an instantaneous phase difference; determining a length of the exposed section of the rock bolt, a length of the rock bolt and a position of a grouting defect based on the integral instantaneous phase difference, a first velocity of the acoustic signal propagating in an exposed section of the rock bolt and a second velocity of the acoustic signal propagating in an anchor section of the rock bolt.
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Patent Agency Ranking
66.发明授权公开(公告)号：US11781926B1
公开(公告)日：2023-10-10
申请号：US18183974
申请日：2023-03-15
Inventor： Bin Liu , Yongshui Kang , Yuanguang Zhu , Xuewei Liu , Sheng Wang , Zhi Geng
IPC: G01L1/24
CPC classification number: G01L1/246
Abstract: The present application provides an optical fibre grating sensor and a strain monitoring method and system for a surrounding rock of a deep roadway, which are used for monitoring deformation of the surrounding rock of the deep roadway and are provided with a weak optical fibre grating array large-range strain sensor, which can accurately monitor the strain of the surrounding rock of the deep roadway. The optical fibre grating sensor comprises an optical fibre, the optical fibre comprises an optical fibre core and a plurality of optical fibre gratings inscribed on the optical fibre core, the optical fibre grating is a weak optical fibre grating with a peak reflectivity lower than 1%, and the plurality of optical fibre gratings perform unit discretization on the whole piece of the optical fibre so as to realize quasi-distributed sensing.
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67.发明公开公开(公告)号：US20230296458A1
公开(公告)日：2023-09-21
申请号：US18183974
申请日：2023-03-15
Inventor： Bin LIU , Yongshui KANG , Yuanguang ZHU , Xuewei LIU , Sheng WANG , Zhi GENG
IPC: G01L1/24
CPC classification number: G01L1/246
Abstract: The present application provides an optical fibre grating sensor and a strain monitoring method and system for a surrounding rock of a deep roadway, which are used for monitoring deformation of the surrounding rock of the deep roadway and are provided with a weak optical fibre grating array large-range strain sensor, which can accurately monitor the strain of the surrounding rock of the deep roadway. The optical fibre grating sensor comprises an optical fibre, the optical fibre comprises an optical fibre core and a plurality of optical fibre gratings inscribed on the optical fibre core, the optical fibre grating is a weak optical fibre grating with a peak reflectivity lower than 1%, and the plurality of optical fibre gratings perform unit discretization on the whole piece of the optical fibre so as to realize quasi-distributed sensing.
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公开(公告)号：US11740371B2
公开(公告)日：2023-08-29
申请号：US16531050
申请日：2019-08-03
Inventor： Bingrui Chen , Tao Li , Fanbo Wei , Xinhao Zhu , Bo Wang
CPC classification number: G01V1/16 , G01L5/0004 , G01L5/16 , G01V1/52 , E21F17/18 , G01V1/48 , G01V2001/526
Abstract: The present invention discloses a device for measuring dynamic evolution of a three-dimensional disturbed stress under mining disturbance, comprising an outer steel cylinder. Three three-direction sensing units are arranged on the outer steel cylinder. Any two of three stress measurement directions of each three-direction sensing unit are perpendicular to each other. Nine stress measurement directions of the three three-direction sensing units are different. The present invention also discloses a method for measuring dynamic evolution of a three-dimensional disturbed stress under mining disturbance. In the present invention, stresses are measured from three perpendicular directions which are inclined, so the difficulty in measuring a three-dimensional stress in a borehole is overcome; and a spatial stress value is measured by three three-direction sensing units, and thus the size and direction of a disturbed principal stress in the borehole are calculated.
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69.发明公开公开(公告)号：US20230195953A1
公开(公告)日：2023-06-22
申请号：US18054898
申请日：2022-11-12
Inventor： Zheng LU , Chuxuan TANG , Hailin YAO , Yang ZHAO , Jie LIU
Abstract: A method for determining a performance of a subgrade of an expressway section and a processing device thereof are used to accurately calculate a stress, a displacement, a velocity and an acceleration at any position inside the subgrade while analyzing the performance of the subgrade of the target expressway section, in full consideration of the moving speed and vibration characteristics of the vehicle load, the layered characteristics of the expressway and the unsaturated characteristics of the subgrade soil.
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公开(公告)号：US20230120870A1
公开(公告)日：2023-04-20
申请号：US17529697
申请日：2021-11-18
Inventor： Liu LIU , Shaojun LI , Quan JIANG , Yaxun XIAO , Guangliang FENG
Abstract: Disclosed is a dual channel nondestructive testing method for a rock bolt and related devices. The method includes: determining a target phase difference and an instantaneous phase difference of the first received signal and the second received signal; determining an integral instantaneous phase difference between the first received signal and the second received signal based on the target phase difference and an instantaneous phase difference; determining a length of the exposed section of the rock bolt, a length of the rock bolt and a position of a grouting defect based on the integral instantaneous phase difference, a first velocity of the acoustic signal propagating in an exposed section of the rock bolt and a second velocity of the acoustic signal propagating in an anchor section of the rock bolt.
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