云山隧道斜井与联络风道交叉结构施工力学特征分析  

Analysis on Construction Mechanics Characteristics of Intersection Structure of Inclined Shaft and Connecting Air Duct in Yunshan Tunnel

作　　者：王镇[1] 张志强[1] 王鸣冠 WANG Zhen ZHANG Zhiqiang WANG Mingguan(Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China)

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,成都610031

出　　处：《路基工程》2017年第1期114-118,共5页Subgrade Engineering

基　　金：国家自然科学基金(51678503);国家自然科学基金(51478396);山西省交通建设科技项目(12-2-04)

摘　　要：以和榆高速公路左权至和顺段云山隧道#3斜井与联络风道交叉结构为工程背景,基于三维有限元方法,设置3个计算工况来模拟斜井与联络风道交叉结构不同开挖支护顺序,研究了斜井与联络风道交叉结构施工力学行为。计算结果表明:先施工斜井再施工联络风道,对联络风道衬砌结构受力有利;交叉处锐角侧联络风道拱肩、拱腰初期支护受力大,施工中可以考虑交叉段联络风道1.5倍洞径范围内采取加固措施;先施工斜井再施工联络风道(工况1)是最优施工方案。Taking the intersection structure of No. 3 inclined shaft and connecting air duct of Yunshan Tunnel in Zuoquan to Heshun Section of Heyu Expressway as engineering background, three calculated working conditions are set based on the three-dimensional finite element method to simulate the different excavation and support sequences of intersection structure of inclined shaft and connecting air duct, and the mechanical behavior of intersection structure of inclined shaft and connecting air duct is studied. The results show that： first construction of inclined shaft and then construction of connecting air duct are beneficial to the stress of the lining structure of connecting air duct ; the initial supporting force of the spandrel and haunch of the acute angle side air duct at the intersection is great, so it may consider to strengthen with the measures within 1.5 times tunnel diameter of the connecting air duct at intersection; the optimal construction program is first construction of inclined shaft and then construction of the connecting air duct （working condition 1 ）.

关 键 词：公路隧道 斜井 联络风道 交叉结构 支护内力 施工力学行为 

分 类 号：U459.2[建筑科学—桥梁与隧道工程]