富水砂层盾构叠落隧道下穿施工对既有建筑的扰动效应  

Disturbance Effect on Existing Buildings Caused by Tunneling of Shield Superimposed Tunnel in Water-rich Sand Layer

作　　者：杜有超 石立民 孔祥勋 姚昌瑞 马金骥 雷云生 李春潮 刘玉辉 DU Youchao;SHI Limin;KONG Xiangxun;YAO Changrui;MA Jinji;LEI Yunsheng;LI Chunchao;LIU Yuhui(CCCC First Harbor Engineering Co.Ltd.,Tianjin 300461,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;Chongqing Research Institute,Harbin Institute of Technology,Chongqing 401135,China)

机构地区：[1]中交第一航务工程局有限公司,天津300461 [2]哈尔滨工业大学土木工程学院,哈尔滨150090 [3]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090 [4]哈尔滨工业大学重庆研究院,重庆401135

出　　处：《科技和产业》2025年第8期64-72,共9页Science Technology and Industry

基　　金：黑龙江省自然科学基金联合引导项目(LH2024D014);重庆市城市管理科研项目(城管科字2023第28号);哈尔滨工业大学结构工程灾变与控制教育部重点实验室开放基金课题(HITCE202408);中国博士后科学基金项目(2024M754193);住房和城乡建设部研究开发项目(2022-K-040)。

摘　　要：盾构隧道叠落区间的施工形式复杂,亟须探究周围既有建筑物受上下线隧道施工扰动的响应规律,以降低潜在施工风险。通过有限元方法模拟了泥水盾构机在进行叠落盾构隧道掘进时,对既有建筑基础的影响。首先开挖下行隧道,随后进行上行隧道的开挖,研究了这一顺序对基础稳定性的具体影响。模拟结果与现场监测数据进行对比,验证了模型的可靠性。结果显示,下行隧道开挖时,基础底部持续沉降;上行隧道开挖时,基础沉降有所减缓,并出现轻微隆起;上行隧道完成后,基础底部沉降呈线性分布。此外,叠落隧道下穿既有建筑主要影响为基础上传来的竖向荷载增加,使得衬砌受力和变形增大。研究结果将为叠落型隧道工程提供设计和参考价值。The construction forms of overlapping sections of shield tunnels are complicated,so it is urgent to investigate the response rules of existing buildings to the disturbance of tunnel construction,so as to reduce the potential construction risks.In this paper,the finite element method was used to simulate the influence of mud-water shield machine on the existing building foundation when the superimposed shield tunnel was driven.First,the down tunnel was excavated,then the up tunnel was excavated,and the concrete influence of this sequence on the stability of the foundation was studied.The simulation results are compared with the field monitoring data to verify the reliability of the model.The results show that the foundation bottom continues to settle when the tunnel is excavated.When the tunnel is excavated,the settlement of the foundation slows down and a slight uplift occurs.After the completion of the ascending tunnel,the settlement at the bottom of the foundation presents a linear distribution.In addition,the vertical load increases on the basis of the main influence of the stacked tunnel under the existing buildings,which makes the lining stress and deformation increase.The research results will provide design and reference value for cascade tunnel engineering.

关 键 词：富水砂层 盾构 叠落穿越 既有建筑 地表沉降 

分 类 号：U455[建筑科学—桥梁与隧道工程]