水道港口2024，Vol.45Issue(1)：107-115,9.
基于正交试验的盾构掘进江底变形分析与施工方案优化
Shield tunnel river foundation deformation analysis and construction scheme optimization based on orthogonal test
摘要
Abstract
The construction of shield tunnel is prone to trigger the loosening and collapse of the upper layer of soil at the excavation surface,causing settlement damage to adjacent buildings.To address the problem of ground deformation in shield tunnel construction,a finite element model was established to simulate the shield tunnel excavation process based on the Nanjing West Jianning Road river crossing project,and to investigate the effects of shield tunneling on riverbed settlement,horizontal and vertical displacements of the deep soil.The L16(45)orthogonal test was arranged with the maximum settlement of riverbed surface,settlement influence range,vertical displacement of vault top and tunnel bottom uplift as indicators,support stress ratio,burial diameter ratio,shield tail grouting pressure and relative density of mud as influencing factors,and the significance and order of each influencing factor were analyzed.The most economical level can be adopted.The optimal level combination is A4 B1 C4 D3 and A4 B2 C4 D3,and the optimized additional test is designed.The additional test scheme 1 reduces the burial diameter ratio and increases the shield tail grouting pressure,and the results show that it has a better effect on the control of formation deformation and is the preferred scheme for this project.关键词
正交试验/盾构掘进/河床变形/方案优化/数值模拟/过江通道Key words
orthogonal test/shield tunneling/riverbed deformation/scheme optimization/numerical simulation/pathway crossing rivers分类
交通工程引用本文复制引用
张体浪,车宇飞,姚森,孙宇,徐振扬,孙阳..基于正交试验的盾构掘进江底变形分析与施工方案优化[J].水道港口,2024,45(1):107-115,9.基金项目
国家自然科学基金项目(41672257) （41672257）
中建七局科技研发课题项目(CSCEC7b-2022-Z-6) （CSCEC7b-2022-Z-6）
浙江省交通运输厅科技计划项目(2020014) （2020014）
