软土盾构掘进施工地表沉降数值模拟计算  

Numerical Simulation Calculation of Surface Settlement for Shield Tunneling Construction in Soft Soil

作　　者：席培胜 钟谨锐 周冠宇 张军 丁润其 XI Peisheng;ZHONG Jinrui;ZHOU Guanyu;ZHANG Jun;DING Runqi(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;Anhui Engineering Research Center of Urban Construction and Underground Space,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,合肥230601 [2]安徽省城市建设和地下空间工程技术研究中心,合肥230601

出　　处：《四川轻化工大学学报（自然科学版）》2024年第5期94-100,共7页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：安徽省自然科学基金青年项目(2208085QE142)。

摘　　要：盾构隧道不可避免地穿越软土地区,盾构穿越软土地层时可能会产生各种潜在危害,因而研究软土盾构隧道地表沉降规律变得格外重要。以某市盾构隧道为例,使用Midas-gts有限元软件,建立三维数值模型,主要研究隧道外径和隧道埋深对地表以及隧道所处地层的沉降影响。结果表明:地层变形具有明显的时间效应,当隧道外径增大时,地表沉降量随之增大,最大值为25.11 mm,隧道所处地层的沉降量也随之增大,最大值为56.05 mm;当隧道埋深增加时,对周围土体的影响减小,地表沉降量随之增大,最大值为13.07 mm,隧道所处地层沉降量随之减小,最小值为27.25 mm。Shield tunnels inevitably pass through soft soil areas,and various potential hazards may arise when shield tunnels pass through soft soil layers.Therefore,it becomes particularly important to study the surface settlement law of soft soil shield tunnel.Taking a city shield tunnel as an example,using Midas-gts finite element software to establish a three-dimensional numerical model,mainly to study the effects of tunnel outer diameter and tunnel depth on the ground surface and the settlement of the strata in which the tunnel is located.The results show that:the deformation of the ground layer has obvious time effect,when the outer diameter of the tunnel increases,the surface settlement increases,the maximum value is 25.11 mm,and the settlement of the ground layer in which the tunnel is located also increases,the maximum value is 56.05 mm.When the tunnel depth increases,the influence on the surrounding soil decreases,the surface settlement increases,the maximum value is 13.07 mm,and the settlement of the stratum in which the tunnel is located decreases,with a minimum value of 27.25 mm.

关 键 词：软土 盾构隧道 数值模拟 地层变形 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]