隧道环形开挖时核心土合理长度研究  

RESEARCH OF RATIONAL LENGTH OF CORE SOIL USED IN ANNULAR EXCAVATION METHOD

作　　者：周路军[1] 叶剑锋 尚岳全[1] 

机构地区：[1]浙江大学土木工程系,杭州310058 [2]浙江省公路管理局,杭州310009

出　　处：《低温建筑技术》2011年第5期87-89,共3页Low Temperature Architecture Technology

摘　　要：为提高预留核心土工法的科学应用,对预留核心土环形开挖法中核心土合理长度问题进行研究。通过有限元模拟,分析了核心土长度变化对围岩塑性区、掌子面纵向位移及拱顶沉降的影响。In order to improve the application of reserving core soil construction method,rational length of core soil used in reserving core soil with annular excavation method is researched.By means of finite element method,the influence of length of core soil to the plastic area in surrounding rock,longitudinal displacement of tunnel face and vault settlement are analyzed.Research shows that rational length of core soil is 2.5~3.5m while surrounding rock is ranked VI.

关 键 词：核心土 环形开挖 合理长度 隧道 有限元法 

分 类 号：TU941[建筑科学—建筑技术科学]