摘要
以宁安高速某隧道穿越浅埋软弱围岩地段工程为例,采用FLAC3D建立了三维模型,分别计算了预留核心土、上下台阶开挖、预注浆等工况下围岩稳定性及变形情况,并在数值模拟的基础上进行了现场监控量测,指出拱顶沉降在安全可控范围之内,全断面注浆结合上下台阶预留核心土开挖方案较好的控制了浅埋软弱的围岩变形。
Taking Ning'an highway tunnel crossing shallow-buried soft surrounding rock section engineering as an example,the paper establishes three-dimensional model by applying FLAC3 D,respectively calculates surrounding rock stability and deformation under the construction conditions of reserved core soil,up-down-step excavation,pre-casting and so on,carries out field monitoring and control measurement on the basis of numerical simulation,and finally points out that: the arch top subsidence is within controlled scope,the scheme of whole-section grouting combining with reserved core soil excavation better controls the shallow-buried soft surrounding rock deformation.
出处
《山西建筑》
2016年第33期163-164,共2页
Shanxi Architecture
关键词
软弱围岩
公路隧道
数值模拟
稳定性
注浆
soft surrounding rock
highway tunnel
numerical simulation
stability
grouting
