Method for determining post-construction ground surface settlement caused by shield tunneling

• Main Authors: LIU YUAN, MENG FANYAN, WU HUAINA, CHEN SHUAN, YANG WEI, CHEN RENPENG, KANG XIN
• Format: Patent
• Language: Chinese; English
• Published: 23.07.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR

The invention relates to the technical field of underground construction engineering, and discloses a method for determining post-construction ground surface settlement caused by shield tunneling, which comprises the following steps: acquiring soil layer information, soil parameters, tunnel design parameters, shield tunneling machine design parameters and shield tunneling parameters; taking soil,forming an e-log p' curve through an indoor consolidation test, and obtaining a q-[gamma]s curve of each soil layer through a non-drainage triaxial compression test; obtaining soil shear strains at different positions after shield tunneling through the three-dimensional numerical model; determining a disturbance degree SDD; determining the apparent self-weight stress, apparent yield stress, rebound index and compression index of each layer of soil body after shield tunneling disturbance based on the disturbance degree SDD to form a disturbed e-log p' curve; and determining the post-construction ground surface settleme