岩土工程学报2024，Vol.46Issue(6)：1270-1278,9.DOI:10.11779/CJGE20230146
基于柱孔收缩理论的含气土盾构施工引起地表沉降研究
Surface settlements caused by shield construction of gas-bearing soils based on column hole shrinkage theory
摘要
Abstract
Relying on the actual project of Hangzhou Metro Tangqing Line shield crossing the gas-bearing stratum,the column hole shrinkage theory is modified,and the formula for calculating the surface settlement caused by the construction of the shield structure of the gas-bearing stratum based on the column hole shrinkage theory is proposed for the first time,and the influences of burial depth of tunnel,excavation radius,matrix suction on the surface settlement caused by the construction of the shield of the gas-bearing stratum are analyzed based on the actual engineering parameters.The results show that the calculated results of the column hole shrinkage theory are in good agreement with the measured data,which can better reflect the surface settlement characteristics caused by shield excavation in gas-bearing strata.Different from that in saturated soils,when the double-line shield passes through the gas-bearing stratum,the surface settlement caused by the leading line is greater.The matrix suction in unsaturated soils such as gas-bearing soils affects the soil characteristics by changing the friction angle and cohesion in the soil,but compared with that of the cohesion of the soil,the change of friction angle of the soil has a greater impact on the surface settlement caused by the shield crossing the gas-bearing strata.关键词
盾构隧道/含气地层/地表沉降/柱孔收缩理论Key words
shield tunnel/gas-bearing stratum/surface settlement/column hole shrinkage theory分类
建筑与水利引用本文复制引用
丁智,彭少杰,张霄,许教明,魏新江..基于柱孔收缩理论的含气土盾构施工引起地表沉降研究[J].岩土工程学报,2024,46(6):1270-1278,9.基金项目
浙江省"尖兵""领雁"研发攻关计划项目(2023C03182) （2023C03182）
浙江省自然科学基金重点项目(LHZ20E080001) （LHZ20E080001）
国家自然科学基金项目(52278418) （52278418）
