摘要
以兰山隧道洞口V级围岩浅埋段施工为例,对采用三台阶临时仰拱法进洞施工中产生的沉降、裂缝较大等问题进行了原因分析,并提出了加密临时仰拱、增加临时竖撑及斜撑、洞口两侧施作反压墙等一系列措施。通过以上措施的及时施作,有效控制了围岩的变形及裂缝的发展,确保了隧道安全进洞。
Based on the shallow-buried loess tunnel portal construction of the Lanshan tunnel in surrounding rock of grade V,this paper introduces the construction problems of larger settlement and cracks by using three-bench and temporary inverted arch construction method. After analyzing the causes,this papers proposed the solutions,including encryption temporary inverted arch,increasing brace,building backpressure wall and other measures. Through the above measures,it is effective to restrain the development of settlement and cracks,ensuring the safety of breaking into a shallow-buried loess tunnel.
出处
《施工技术》
CAS
北大核心
2015年第19期106-109,共4页
Construction Technology
基金
国家自然科学基金项目(51474097)
关键词
隧道工程
浅埋黄土
沉降
裂缝
施工技术
监测
tunnels
shallow-buried loess
settlement
cracks
construction
monitoring
