大直径平行顶管施工顺序对地表沉降的影响研究  

Influence of Construction Sequence of Large-diameter Parallel Pipe Jacking on Surface Settlement

作　　者：沈青松 彭赵 朱文灿 秦文正 杜年夫 SHEN Qingsong;PENG Zhao;ZHU Wencan;QIN Wenzheng;DU Nianfu(Power China Huadong Engineering Corporation Limited,Hangzhou 311100,China)

机构地区：[1]中国电建华东勘测设计研究院有限公司,浙江杭州311100

出　　处：《石家庄铁道大学学报(自然科学版)》2025年第1期29-34,共6页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

摘　　要：大直径平行顶管施工过程中不可避免地会对周围土体产生扰动,导致地表沉降现象。因此,开展地表沉降研究就显得尤为重要。基于杭州取水口上移工程,监测分析平行顶管同步顶进施工时的地表沉降变化规律。通过数值模型分析表明,相较于同步顶进的施工方式,先后顶进引起的沉降值将减小8.55%。进一步分析表明,随着顶管直径比值的减小,先后顶进相较于同步顶进的地表沉降减小幅度会降低;随着顶管埋深和间距的减小,该减小幅度会略有增加。During the construction process of large-diameter parallel pipe jacking,it is inevitable to cause disturbance to the surrounding soil,leading to surface settlement.Therefore,conducting research on surface subsidence is particularly important.Based on the Hangzhou water intake upward project,the changes in surface settlement during parallel pipe jacking construction were monitored and analyzed.Numerical model analysis shows that compared to the synchronous jacking construction method,the settlement caused by successive jacking will be reduced by 8.55%.Further analysis shows that as the ratio of top pipe diameters decreases,the reduction in surface subsidence caused by successive jacking compared to synchronous jacking will decrease;As the burial depth and spacing of the top pipe decrease,the magnitude of the decrease will slightly increase.

关 键 词：顶管 地表沉降 施工顺序 工程实践 数值模拟 

分 类 号：TU992[建筑科学—市政工程]