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公开(公告)号：US20240218626A1
公开(公告)日：2024-07-04
申请号：US17801768
申请日：2021-10-26
发明人： Zheng LU , Chuxuan TANG , Hailin YAO , Jie LIU , Yongxiang ZHAN , Xingwen LUO , Mingliang YANG , Yang ZHAO
摘要： A device and method for health diagnosis of subgrade service performance, including: a loading device, which applies a load to a road; a data acquisition device, which collects stress and vertical displacement generated by a pavement layer when a load is applied; a data analysis device, that performs a frequency spectrum analysis on a vertical displacement signal to obtain a propagation speed of a Rayleigh wave of a pavement layer and a thickness of the pavement layer, and thereby obtains an elastic modulus of the pavement layer; inputting the stress, vertical displacement, elastic modulus and thickness of pavement layer into a trained subgrade soil modulus calculation model to obtain an elastic modulus of subgrade soil; and obtaining a dynamic deformation value of the subgrade under a standard load, and evaluating a health state of the subgrade according to the dynamic deformation value.
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公开(公告)号：US20230195953A1
公开(公告)日：2023-06-22
申请号：US18054898
申请日：2022-11-12
发明人： Zheng LU , Chuxuan TANG , Hailin YAO , Yang ZHAO , Jie LIU
摘要： 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：US20230131570A1
公开(公告)日：2023-04-27
申请号：US17809001
申请日：2022-06-26
发明人： Zheng LU , Yang ZHAO , Hailin YAO , Chuxuan TANG , Jie LIU
IPC分类号： G06F30/13
摘要： A method for determining mechanical performance of the road includes the following: acquiring an initial subgrade reaction modulus ks of a subgrade of a target road section by using a field plate-bearing test process; acquiring a preset load p of the subgrade and geocell parameters of a preset geocell of the subgrade; calculating a composite subgrade reaction modulus kr of the subgrade on condition that the roadbed is under a reinforced working condition by a composite modulus calculation formula; calculating an equivalent thickness RP of the roadbed under the reinforced working condition by a depth adjustment calculation formula; and outputting the composite subgrade reaction modulus kr and the equivalent thickness RP.
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