深埋软土盾构衬砌管片厚度对内力及位移的影响  

The Influence of Deep Buried Soft Soil Shield Tunnel Lining Thickness on Internal Force and Displacement

作　　者：陈域 左澍琼 杨永杰 杨兆 CHEN Yu;ZUO Shuqiong;YANG Yongjie;YANG Zhao(Power China Kunming Engineering Corporation Limited,Kunming 650051,China;Yunnan Dianzhong Water Diversion Engineering Co.,LTD,Kunming 650000,China)

机构地区：[1]中国电建集团昆明勘测设计有限公司,云南昆明650051 [2]云南省滇中引水工程有限公司,云南昆明650000

出　　处：《云南水力发电》2025年第2期106-111,共6页Yunnan Water Power

基　　金：云南省重大科技专项计划项目(202002AF080003)。

摘　　要：基于Phase2.0二维有限元软件,建立了输水隧洞盾构管片的二维有限元模型,结合滇中引水工程某段地勘资料,对深埋软土盾构衬砌断面进行了内力计算,对比分析了衬砌结构四节点实体单元与两节点壳单元两种建模方法的内力计算结果差异,计算得到了不同盾构衬砌管片厚度下衬砌产生的内力及位移,总结了隧洞衬砌内力及位移随衬砌管片厚度变化的影响规律。结果表明,在相同埋深情况下,衬砌两侧及顶部轴力几乎不受衬砌管片厚度的影响;衬砌两侧及顶部弯矩随衬砌管片厚度的增加而增加;衬砌顶部、底部及两侧发生的位移则随衬砌管片厚度的增加而减小。Based on Phase2.0 two-dimensional finite element software,a two-dimensional finite element model of the shield segment of the tunnel was established,and the force calculation of the deep buried soft soil shield lining section was carried out.The difference of internal force calculation results between the two modeling methods of the four-node solid element and the two-node shell element of the lining structure was compared and analyzed.The internal force and displacement of the lining under different thickness of shield lining segments are calculated,and the influence of internal force and displacement of tunnel lining on the thickness of lining segments is summarized.The results show that the axial forces on both sides and the top of the lining are almost unaffected by the thickness of lining segments under the same burial depth.The bending moments on both sides and top of lining increased with the increase of lining segment thickness.The displacement at the top,bottom and both sides of the lining decreases with the increase of the thickness of the lining segments.

关 键 词：盾构管片 特征参数 数值模拟 力学特性 

分 类 号：TV222[水利工程—水工结构工程] TV314