摘要
以某隧道富水全风化花岗岩段初支下沉变形防治实践为例,研究揭示了隧道初支下沉变形机理,提出了富水全风化花岗岩隧道初支下沉变形总体防治原则,并通过理论分析建立了以洞内外降排水、地表预注浆、初支支护强度加强及监控量测为主的综合防治技术体系,同时在现场成功应用实施,成功解决了该隧道富水全风化花岗岩段初支下沉变形防治技术难题。研究成果对类似条件下隧道建设具有借鉴意义。
This paper presents a case history of mitigating the settlement of initial support of tunnel excavations in the saturated completely weathered granite soils and the factors that inducing the settlement are also investigated.The general guidelines for minimizing the settlement in the initial support are also proposed.Settlement mitigation measures,such as,dewatering around the excavated area,grouting from the ground surface and increasing the stiffness of the initial supporting structures and the construction monitoring system were established based on the theoretical analysis.The comprehensive approaches were applied in the construction and resolved the excessive deformation in the initial support of tunnel excavation in saturated completely weathered granite soils.
作者
黄银海
HUANG Yinhai(Fujian Highway Bridge Engineering Co.Ltd.,Xiamen 361008)
出处
《土工基础》
2021年第6期690-693,共4页
Soil Engineering and Foundation
关键词
富水
全风化花岗岩
初支下沉
防治技术
saturated
completely weathered granite
settlement of initial support
mitigation method
