摘要
陡倾软弱地层条件下隧道支护结构应力分布极不均衡,围岩稳定性差,施工过程中极易产生支护结构开裂、渗漏水、剥落、塌方等地质灾害,对施工安全造成极大威胁。为全面解决陡倾软弱地层隧道施工安全问题,结合典型依托工程,总结分析其工程特性,利用数值模拟研究其施工力学特性,揭示其地质灾害形成机理,并有针对性地提出围岩注浆加固、增设工字钢等处治措施,为类似地层条件下的隧道施工提供借鉴。
Under the condition of steep and weak stratum,the stress distribution of the tunnel support structure is extremely imbalance,the surrounding rock is unstable.In the construction process,the geological disasters,such as cracking,leakage,stripping and collapse of support structure,greatly threat the construction safety.In order to solve the tunnel construction safety problems,combining with typical supporting engineering,this paper summarized and analyzed the engineering characteristics.The numerical simulation was used to study the construction mechanical performance and reveal the formation mechanism of geological disasters.Targeted treatments,such as grouting reinforcement of surrounding rock and adding I-beams,were put forward,which can provide reference for tunnel construction under the similar stratum conditions.
作者
高飞
GAO Fei(Shanxi Changxing Road&Bridge Engineering Co.,Ltd.,Changzhi,Shanxi 046000,China)
出处
《山西交通科技》
2020年第4期116-119,共4页
Shanxi Science & Technology of Transportation
关键词
陡倾软弱地层
隧道工程
破坏机理
处治技术
steep and weak stratum
tunneling
failure mechanism
treatment technology
