盾构下穿邻江异型地下结构的安全评价

Safety assessment of shield undercrossing neighborhood heterotypic underground structure

以规划的上海地铁18号线下穿紧邻黄浦江的特大异型地下结构工程为背景,采用大型有限元计算软件ABAQUS,对盾构下穿导致地下结构及周围环境扰动的影响进行了模拟预测,选取典型断面计算分析了盾构推进主要参数变化对地下结构影响的差异,对盾构下穿的安全性做出了评价,提出了减小盾构扰动的措施,研究结论可为今后类似工程提供有益的借鉴。

Taking Shanghai subway line No. 18 undercrossing neighborhood Huangpu river extra heterotypic underground structure engineering as the background, the essay applies large-scale finite element software ABAQUS, simulates and predicts the impacts of shield undercrossing on underground structure and surrounding environment disturbance, and selects typical section for calculation, and analyzes differences of impacts of shield parameter changes on underground structure, evaluates the safety of shield undercrossing, and puts forward measures to reduce shield disturbance. The research results can provide beneficial references for similar engineering in future.