岩土与地下工程 2026年 第卷 第01期

DOI: 10. 7672 / sgjs2026010043

复合地层盾构掘进支护压力对掌子面稳定性的影响研究

赵志坚¹,杨 剑¹,张 军²,付一明³

作者简介：

赵志坚,工程师,E⁃mail:460517856@ qq. com

作者单位：

1. 中铁南方投资集团有限公司,广东 深圳 518000; 2. 中铁二院工程集团有限责任公司,四川 成都 610031; 3. 同济大学土木工程学院,上海 200092

基金项目：

国家自然科学基金(52090083);中铁南方投资集团有限公司技术开发项目

摘要：

复合地层中盾构掘进风险大,时常诱发掌子面的过大变形或塌方事故. 以深圳上软下硬复合地层为例,依托深圳 11 号线二期某区间,通过精细化数值模拟探究了盾构掘进支护压力对掌子面稳定性的影响规律,分析了上软下硬和全软两种典型地层的差异. 首先,基于土体极限主拉应变理论,编制了 Python 程序,实现了 ABAQUS 数值模拟结果中掌子面前塑性区形状和体积大小的自动提取,并与理论解对比验证. 掌子面前塑性区体积比随支护压力比呈现先减小后增大的趋势,对于全软地层,支护压力比为 0. 62~ 1. 42 时,掌子面前较为稳定. 而对于上软下硬地层,支护压力比为 0. 64~ 1. 76 时,掌子面前较为稳定.
隧道;盾构;复合地层;掌子面;支护;压力

English：

The risk of shield tunneling in composite strata is high, which often induces excessivedeformation or collapse of the tunnel face. Taking the upper⁃soft and lower⁃hard composite strata inShenzhen as an example, based on an interval of Shenzhen Metro Line 11, Phase II, the influence ofshield tunneling support pressure on the stability of the tunnel face was explored through fine numericalsimulation, and the differences between the two typical strata of upper⁃soft and lower⁃hard and full⁃softwere analyzed. Firstly, based on the limit principal tensile strain theory of soil, the Python program wascompiled to realize the automatic extraction of the shape and volume of the plastic zone in front of thetunnel face in the ABAQUS numerical simulation results and compared with the theoretical solution. Thevolume ratio of the plastic zone in front of the tunnel face decreases first and then increases with thesupport reaction ratio. For the fully soft strata, when the support pressure ratio is 0. 62~1. 42, the frontof the tunnel face is more stable. When the support pressure ratio of the upper soft and lower hard stratais 0. 64~1. 76, the face of the tunnel is relatively stable.