摘要
富水未成岩粉细砂在国内隧道施工中极少见到,该岩性隧道开挖后极不稳定,呈流塑状,极易出现溜塌现象,造成初期支护变形侵限,甚至造成大的坍塌,严重影响到工程质量、安全、工期及成本。文章结合兰渝铁路LYS-7标段桃树坪隧道第三系富水未成岩粉细砂试验段的施工,就富水未成岩粉细砂的施工技术做一小结。
It is rare for a domestic tunnel to encounter water-rich non-diagenetic fine sand, which is very unstable after excavation. Its susceptibility to plastic flow and slide collapsing can result in clearance intrusion of the primary support, significant caving-in, and negative effects to construction quality, safety, period, and cost. Based on the construction of lot LYS-7 of the Taoshuping tunnel in the tertiary water-rich non-diagenetic fine sand, this paper summarizes the construction techniques for a tunnel with these characteristics.
出处
《现代隧道技术》
EI
北大核心
2012年第4期111-119,139,共10页
Modern Tunnelling Technology
关键词
桃树坪隧道
富水未成岩粉细砂
施工技术
Taoshuping tunnel
Water-rich non-digenetic fine sand
Construction technique
