流固耦合作用下矩形顶管施工地层稳定性研究  

Study on the Stability of the Formation of Rectangular Pipe Jacking under Fluid-Solid Coupling

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作  者:蔡常宽 雷庆关 Cai Changkuan;Lei Qingguan(College of Civil Engineering,Anhui Jianzhu University,Hefei,Anhui 230601,China)

机构地区:[1]安徽建筑大学土木工程学院,安徽合肥230601

出  处:《黑龙江工业学院学报(综合版)》2024年第7期149-156,共8页Journal of Heilongjiang University of Technology(Comprehensive Edition)

基  金:安徽省高等学校自然科学研究重大基金资助(项目编号:KJ2014ZD07)。

摘  要:为研究基于流固耦合原理的顶管施工对地层稳定性的影响,以合肥市某在建顶管隧道为背景,结合顶管施工中的监测资料,采用Midas GTS NX软件建立顶管施工三维数值模型,在流固耦合作用下分析不同工况顶管隧道周围的渗流场及位移场的变化规律。结果表明,随着顶管隧道的开挖,隧道周围的孔隙水压力显著减小,受开挖扰动影响地表沉降值不断叠加,在隧道轴线上方的位置达到最大值,由于地下水渗流影响地表沉降加剧,初始水位距地表高度增大地表最大沉降值减小。研究结果可为类似施工提供理论参考,以确保施工安全。In order to study the influence of pipe jacking construction on foundation stability based on the principle of fluid-solid coupling,a pipe jacking tunnel under construction in Hefei is taken as the background,combined with the monitoring data of pipe jacking construction,and a three-dimensional numerical model of pipe jacking construction is established by Midas GTS NX software,and the seepage and displacement fields around the tunnel under the effect of fluid-solid coupling under different working conditions are analyzed.The analysis shows that with the excavation of the tunnel,the pore water pressure around the tunnel decreases significantly,the surface settlement value is superimposed by the excavation disturbance and reaches the maximum value above the tunnel axis,and the surface settlement is aggravated by the seepage of water from the groundwater,and the maximum settlement value of the surface decreases with the increase of the height of the initial level of the water from the ground surface.The findings can provide theoretical reference for similar construction to ensure the safety of construction.

关 键 词:顶管 流固耦合 地表沉降 数值模拟 

分 类 号:U25[交通运输工程—道路与铁道工程]

 

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