摘要
通过数值模拟和无量纲分析方法,对在典型尺寸条件下、不同埋深比的盾构开挖面失稳土体扰动机制展开了分析和研究。研究结果表明:软土地层中盾构开挖面失稳区域近似呈现出"盆"状;在不同埋深比下,开挖面失稳对地表沉降的影响也不一致,埋深比越大,地表沉降越小,沉降范围越大。该结论为后续软土地层盾构施工提供了有益的参考。
Through numerical simulation and dimensionless analysis,and under the condition of typical size,the disturbance mechanism of unstable soil mass in shield excavation surface with different buried depth ratio is analyzed and studied.The results show that the instability area of shield excavation surface in soft soil stratum is similar to"basin"shape and the influence of the instability of excavation surface with different buried depth ratio on ground surface settlement is also inconsistent,the larger the buried depth ration,the smaller the surface settlement and the large the settlement range.This conclusion provides a useful reference for the subsequent shield construction in soft soil stratum.
作者
颜超
YAN Chao(Shanghai Construction Group Co.,Ltd.,Shanghai 200080,China)
出处
《建筑施工》
2020年第2期238-240,共3页
Building Construction
基金
上海市青年科技英才扬帆计划资助项目(19YF1421000)
上海建工集团股份有限公司重点科研项目(17JCYJ-02)。
关键词
软土地层
盾构施工
开挖面失稳
土体扰动
soft soil stratum
shield construction
instability of excavation surface
soil disturbance
