辽宁工程技术大学学报（自然科学版）2023，Vol.42Issue(6)：664-670,7.DOI:10.11956/j.issn.1008-0562.2023.06.004
城市隧道同时侧穿桩基和下穿既有隧道变形分析
Analysis of deformation of power tunnel passing through pile foundation and underneath at the same time
摘要
Abstract
In order to study the stress and deformation laws of urban tunnels passing through pile foundations and tunnels simultaneously,based on the main construction project of the 220 kV power tunnel in Dalian Donggang Business District,theoretical analysis and calculation of pile foundation and existing tunnel deformation were carried out through a combination of single pile horizontal displacement equation,empirical parameter correction formula,and Peck formula.Numerical simulation tests and on-site measurement verification were used.The influence of power tunnel excavation on the displacement and stress of pile foundations was analyzed,and the settlement deformation of existing tunnels was studied.The research results show that the horizontal displacement and end settlement of pile foundations continue to increase with the progress of power tunnel construction;as the depth of the pile increases,the axial force of the pile first increases and then decreases;as the distance between the tunnel and the pile increases,the axial force of the pile body first increases and then tends to stabilize;the bending moment of the pile increases with the distance between the tunnel and the pile at different depths,but the increase is relatively small.The existence of existing tunnels can also have deformation effects on pile foundations.The maximum settlement displacement of the existing tunnel obtained from numerical simulation is 7.34 mm.The numerical simulation results are consistent with the theoretical calculation and on-site measurement results.The research conclusion provides reference for similar projects that cross simultaneously.关键词
电力隧道/同时穿越/桩基/既有隧道Key words
power tunnel/simultaneous crossing/pile foundation/existing tunnel分类
交通工程引用本文复制引用
李金奎,庄文..城市隧道同时侧穿桩基和下穿既有隧道变形分析[J].辽宁工程技术大学学报（自然科学版）,2023,42(6):664-670,7.基金项目
国家自然科学基金项目(51174038 （）
51878108) （）
辽宁省教育厅科研项目(L2014693) （L2014693）
