摘要
以杭州市某过街设施建设为例,依托工程中全面的监测数据,并利用弹性力学理论对地表沉降进行了计算,分析顶管顶进全过程中周围土体的水平及侧向位移规律,探讨了避免地表隆起及减缓地表沉降的施工方法和措施。主要结论为顶管顶进会引起顶进段周围地表沉降且具有一定的规律,顶进过程会引起深层土体水平位移,合理的注浆及顶进速度可以避免掌子面前方的地表隆起,二次注浆可以减缓施工过程中的隆起又不会引发大幅度沉降等,从而为类似城市过街通道建设提供经验。
Taking a crossing facilities construction as an example,the paper focuses on the influence of large-section rectangular pipe jacking on the surrounding environment based on data during the construction and used the theory of elasticity to calculate the ground subsidence.This paper analyzes the horizontal and lateral displacement of the surrounding soil during the whole process of pipe jacking,and discusses the construction methods to avoid the surface uplift and slow down the surface subsidence.The main conclusion is that reasonable grouting and jacking speed can completely avoid the surface uplift in front of the palm surface,and the secondary grouting can slow down the uplift in the construction process without causing a large settlement,which provides experience for the future construction of urban crossing passage.
作者
张俊
杨毅
Jun Zhang;Yi Yang(Hangzhou Rail Transit Operation and Public Utilities Support Center,Hangzhou,Zhejiang,310000,China;Hangzhou 701 Project Management Office,Hangzhou,Zhejiang,310000,China)
出处
《工程设计与施工》
2024年第1期30-32,共3页
Engineering Design and Construction
关键词
矩形顶管
开挖变形
过街通道
注浆减摩
rectangular pipe jacking tunnel
excavation deformation
underground street passage
antifriction slurry
