浅埋偏压隧道洞口段盖挖施工稳定性分析

Stability Analysis of Covered Excavation Construction in Shallow Buried Bias Tunnel Portal Section

阐述河北省张承高速公路小营隧道洞口浅埋偏压段采用的盖挖施工方案及数值模拟结果,结果表明,相应方案可降低临时边坡的高度并保障隧道施工安全。经数值模拟计算与现场验证,边坡稳定性可控,相关研究成果可为类似工程提供借鉴。

The research introduced the covered excavation method and numerical simulation of shallow buried bias section of the Xiaoying Tunnel portal on the Zhangcheng Expressway in Hebei Province.It has showed that the scheme can reduce the height of temporary slope and the safety risk of tunnel construction.It has also proved that slope stability can be controlled through numerical simulation and field verification,and relevant research results can provide reference for similar projects.