地下建筑岩土工程勘察与支护系统设计要点研究

Research on Key Points of Geotechnical Engineering Investigation and Support System Design for Underground Buildings

文中以实际工程为研究对象,深入分析了地下建筑的勘察、岩土体质量评价、支护体系设计与核算的重点内容。分析计算得出,本工程支护结构推荐使用挪威隧道法加固支护模式,并初步给出支护结构部分参数,其中,洞顶和洞壁采用直径25 mm、长度7.0 m的锚杆;洞顶和洞壁的钢纤维混凝土厚度分别为120、100 mm。文中研究结果对于本工程后续施工以及相关地下建筑的勘察、设计工作具有一定借鉴意义。

In order to further clarify the design method of the support structure of underground buildings and improve the design quality,this paper takes the actual project as the research object,and deeply analyzes the key contents of the investigation of underground buildings,the quality evaluation of rock and soil mass,the design and accounting of the support system.It is concluded that the Norwegian tunnel method is recommended to strengthen the supporting structure of this project,and some parameters of the supporting structure are preliminarily given,in which the roof and wall of the tunnel adopt the anchor rod with a diameter of 25 mm and a length of 7.0 m.The thickness of steel fiber concrete on the roof and wall of the tunnel is 120 mm and 100 mm respectively.The research results of this paper have certain reference significance for the subsequent construction of this project and the investigation and design of related underground buildings.