水力发电2024，Vol.50Issue(9)：30-35,6.
盾构掘进期隧洞穿越竖井段对周围土体渗流场的影响研究
Influence of Tunnel Crossing the Shaft Section on the Seepage Field of Surrounding Soil during Shield Tunneling Period
摘要
Abstract
In order to study the influence of tunnel crossing the shaft on the seepage field of surrounding soil during shield tunneling,the Chuanqin Tunnel in Henan Province is taken as an engineering basis,and a three-dimensional seepage finite element computational model of the soil around the shaft section during shield tunneling is established.The distributions and its evolution pattern of the seepage field of surrounding soil before and after crossing the ungrouted and grouted filled shaft sections are compared and analyzed.The results show that,(a)the maximum seepage gradient and unit discharge of the soil around the shaft increased by 6.00 and 4.29 times respectively compared with that before crossing the shaft,and the seepage surface of the soil around the shaft is gradually elevated and the isotropic line became more intensive;and(b)the maximum seepage gradient and unit discharge of the soil around the shaft decreased significantly after crossing the grouted and filled shaft.Crossing the shaft during tunneling would affect the seepage field of surrounding soil,reduce the stability of soil,and easily lead to seepage damage.Meanwhile,grouting to fill the shaft can effectively reduce the impact of tunnel excavation on surrounding soil and improve the stability of soil.关键词
竖井/周围土体/三维渗流分析/渗流场/渗透坡降/单宽渗透流量Key words
shaft/surrounding soil/three-dimensional seepage analysis/seepage field/seepage gradient/unit discharge分类
建筑与水利引用本文复制引用
岳潇,王旭峰,刘地福,甘磊,沈振中..盾构掘进期隧洞穿越竖井段对周围土体渗流场的影响研究[J].水力发电,2024,50(9):30-35,6.基金项目
山东电力工程咨询院有限公司科技项目(37-K2023-090) （37-K2023-090）
