科技创新与应用2024，Vol.14Issue(36)：106-109,4.DOI:10.19981/j.CN23-1581/G3.2024.36.024
富水砂卵石地层盾构下穿既有房屋结构的扰动沉降特征及控制技术
郑太毅1
作者信息
- 1. 中铁十五局集团有限公司,上海 200070
- 折叠
摘要
Abstract
Sandy Cobble Stratum are mechanically unstable strata.Shield tunneling projects in water-rich Sandy Cobble Stra-tum can easily cause stratigraphic losses and surrounding rock disturbanceswhen passing through buildings(structures)at close dis-tances.This paper uses numerical simulation and field tests to conduct research on disturbance settlement characteristics of shield tunneling passing through existing building structures in water-rich sandy cobble stratum.The results demonstrate that:During the penetration process,shield tunnel excavation first affects the horizontal deformation of the existing structure,and then affects the settlement deformation.As the shield tunneled,the maximum settlement deformation occurred near the central axis of the house,while the maximum horizontal displacement occurred after the tunneling was completed.The combined reinforcement measures of steel pipe isolation piles+tracking grouting+in-hole grouting combined with stable excavation parameter control can effectively reduce the impact of shield tunneling project on shallow foundation structure in water-rich sandy cobble stratum.关键词
盾构隧道/砂卵石地层/地表沉降/掘进参数/有限元法Key words
shield tunnel/sandy cobble stratum/ground surface settlement/tunneling parameter/finite element method分类
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郑太毅..富水砂卵石地层盾构下穿既有房屋结构的扰动沉降特征及控制技术[J].科技创新与应用,2024,14(36):106-109,4.
