浅埋粘土层大跨度隧道施工技术与塌方风险防范

CONSTRUCTION TECHNOLOGY OF SHALLOW-BURIED CLAY LAYER AND LARGE-SPAN TUNNEL AND PREVENTION OF COLLAPSE RISK

大跨度隧道施工作为土木工程建设中重要组成部分,对于我国城市建设以及交通发展等均起到重要影响。针对大跨度隧道施工过程中浅埋粘土层施工容易受到多种因素影响出现塌方风险,例如围岩级别、隧道深度、地下水文特征、挖掘方式以及挖掘技术等,这些因素均可能造成工程沉降,导致土建工程质量以及工期受到影响。基于此,针对浅埋粘土层大跨度隧道施工技术内容进行研究,同时对于造成隧道塌方因素进行分析并提出几点建议,以期为从业者从业技术提供辅助参考。

As an important part of civil engineering construction,long-span tunnel construction has an important impact on China's urban construction and traffic development.During the construction of long-span tunnel,the construction of shallow buried clay layer is easy to be affected by many factors,resulting in collapse risk,such as surrounding rock level,tunnel depth,underground hydrological characteristics,excavation method and excavation technology.These factors may cause project settlement and affect the quality and construction period of civil engineering.Based on this,this paper studies the construction technology of long-span tunnel in shallow clay layer,analyzes the factors causing tunnel collapse,and puts forward some suggestions,in order to provide auxiliary reference for practitioners.