盾构始发地基加固土数值分析及安全保证措施

Numerical analysis on shielding departure foundation reinforcing soil and safety guarantee measures

以杭州地铁一号线下沙开发区某区间隧道工程盾构始发处地基加固土为研究对象,利用ANSYS软件建立加固土模型,分析了加固土在洞门凿开后以及盾构穿越后的应力分布规律,对加固形式可靠性进行了分析,并通过现场工程实际情况对数值分析结果进行了验证,找出加固土受力薄弱环节,并提出了一些安全保证措施,得出了一些可靠的结论。

Taking the sectional tunnel engineering shielding departure foundation reinforcing soil in Xiasha development region in Hangzhou subway line No.1 as the research target,using ANSYS software to establish reinforcing soil model,the paper analyzes the stress distribution law of reinforcing soil after the tunnel portal opening and shielding crossing,analyzes the reliability of the reinforcing form,and testifies the numerical analysis results according to in-situ engineering condition,and finally finds out the weak stress parts of reinforcing soil,and points out some safety guarantee measures,and obtains some reliable conclusions.