路基工程Issue(4)：219-224,6.DOI:10.13379/j.issn.1003-8825.202308045
富水砂卵石地层盾构隧道近接下穿运营线路变形特性分析
Analysis of Deformation Characteristics of Undercrossing Line in Operation Adjacent to Shield Tunnel in Water-rich Sandy Cobble Stratum
徐波 1裴亮 1殷国权1
作者信息
- 1. 中国水利水电第七工程局成都水电建设工程有限公司,成都 611130
- 折叠
摘要
Abstract
Based on the engineering of Shuangliu Airport—Longqiao Road Station section of Chengdu Metro Line 19 undercrossing the existing Metro Line 3,ANSYS numerical simulation software was used to analyze,under the reinforcement combined advance pipe-shed support with deep hole grouting inside the tunnel in water-rich sandy cobble stratum,the settlement feature of ground surface and the deformation feature of segment support structure for existing subway in the whole course of shield undercrossing;and then on the basis of the measured data,the numerical simulation was proved to be correct.The result shows that,the vertical settlement of ground surface conforms to Peck curve distribution,and the maximum subsidence is 2.59 mm and meets the control requirement of underpass construction;the segments of Line 3 keep stable and the maximum vertical displacement is 4.80 mm;the left and right hance are subject to excavation disturbance in the undercrossing section,leading to relatively large horizontal displacement,but it will nearly recover after the underpass construction.The data measured on the site indicate that the combined reinforcement scheme may ensure the safety of shield construction and the line in operation.关键词
盾构隧道/近接下穿/砂卵石地层/管棚/深孔注浆/地表沉降/支护结构变形Key words
shield tunnel/adjacent underpass/sandy cobble stratum/pipe shed/deep hole grouting/ground surface settlement/deformation of supporting structure分类
交通工程引用本文复制引用
徐波,裴亮,殷国权..富水砂卵石地层盾构隧道近接下穿运营线路变形特性分析[J].路基工程,2024,(4):219-224,6.
