摘要
以西安地铁十五号线航天城站Ⅲ号出入口过街通道矩形顶管工程为研究对象,运用三维数值模拟技术,深入分析复杂地层条件下矩形顶管施工对周边盾构隧道及下穿管线的影响规律。重点探讨土舱压力、注浆压力、等代层模量及管土摩擦系数等关键施工参数对围岩变形和既有结构安全的影响,并提出相应的风险控制策略。研究结果表明,合理调控土舱压力(1.4倍侧向压力)和注浆压力(0.08 MPa~0.10 MPa),同时将地层回弹模量提升至955.2 MPa以上,可显著降低施工风险,保障盾构隧道与管线的安全运营。
Focusing on the rectangular pipe jacking project of the underpass channel at ExitIIIof Hangtiancheng Station on Xi’an Metro Line 15.Utilizing three-dimensional numerical simulation,it investigates the influence patterns of rectangular pipe jacking construction on adjacent shield tunnels and undercrossing pipelines in complex stratum environments.The impacts of key construction parameters such as earth chamber pressure,grouting pressure,equivalent layer modulus,and pipe-soil friction coefficient on surrounding rock deformation and the safety of existing structures are meticulously examined,and risk control recommendations are proposed.The study reveals that rational control of earth chamber pressure(1.4 times the lateral pressure)and grouting pressure(0.08 MPa~0.10 MPa),along with enhancing the formation rebound modulus to 955.2 MPa or higher,can effectively mitigate construction risks and ensure the safe operation of shield tunnels and pipelines.
作者
杨逸飞
Yang Yifei(Xi’an Rail Transit Group Company Limited,Xi’an Shaanxi 710000,China)
出处
《山西建筑》
2026年第2期164-169,共6页
Shanxi Architecture
关键词
矩形顶管施工
下穿管线
数值模拟
土舱压力
注浆压力
rectangular pipe jackingconstruction
undercrossing pipeline
numerical simulation
earth chamber pressure
grouting pressure
