特大断面双线隧道不同施工工艺受力变形特性分析  

Analysis of Force and Deformation Characteristics of Different Construction Techniques for Two-lane Tunnels with Very Large Cross-sections

作　　者：颜肖健 YAN Xiao-jian(Shaoxing Kezhu Expressway Co.,Ltd.,Shaoxing,Zhejiang,312000,China)

机构地区：[1]绍兴市柯诸高速公路有限公司,浙江绍兴312000

出　　处：《建材技术与应用》2024年第6期42-46,共5页Research and Application of Building Materials

摘　　要：通过对台阶法、CRD法和双侧壁导坑法在隧道施工过程中对围岩应力和变形的影响进行数值模拟和数据分析,研究发现:台阶法初期扰动小,但后期应力集中变形增大;CRD法因逐段开挖初期隆起沉降大,应力集中不均匀;双侧壁导坑法初期变形控制好,后期变形增加。In this paper,the numerical simulation and data analysis of the influence of step method,CRD method and double sidewall guided pit method on the stress and deformation of surrounding rock during tunnel construction are carried out.The results show that the disturbance of step method is small in the initial stage,but the stress concentration deformation increases in the later stage.CRD method has large uplift settlement and uneven stress concentration in the early stage of excavation.The deformation of double sidewall guided pit method is controlled well in the early stage,and the deformation increases in the later stage.

关 键 词：台阶法 CRD法 双侧壁导坑法 变形控制 

分 类 号：TU473.2[建筑科学—结构工程]