西南交通大学学报 2004, 39(3) 362-365 DOI:     ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
连拱隧道
模型试验
现场试验
支护结构
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林刚
何川
PubMed
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双连拱公路隧道支护结构体系试验研究

林刚;何川

西南交通大学土木工程学院,四川成都610031

摘要

为了确定Ⅱ类围岩条件下四车道双连拱公路隧道的合理支护结构和支护原则,进行了相似模拟试验,并 通过现场原位试验进行印证和补充.结果表明:中墙内力在施工过程中变化十分复杂,施工中应重点考虑中墙抗 倾覆的要求;初期支护体系应以系统锚杆和喷混凝土为主、钢支撑为辅.最后提出了在Ⅱ类及以下围岩中修建四 车道双连拱公路隧道的施作原则

关键词 连拱隧道   模型试验   现场试验   支护结构   

Experiments of Support Structure of Twin-Bore Highway Tunnels

LIN Gang;HE Chuan

School of Civil Eng., Southwest Jiaotong University, Chengdu 610031, China

Abstract:

Similar simulation tests were made to determine the reasonable structure and principle of supporting for twin-bore highway tunnels with four driveways excavated in classⅡsurrounding rock, and in-situ testing was carried out to prove and complement the experimental result in laboratory. The research results show that because stresses in the mid-partition of twin-bore highway tunnels become very complexly in the construction process, main attention shall be paid to preventing the mid-partition from turning over during the construction. In addition, rock bolts and shotcrete, instead of steel supports, should be taken as the main preliminary supporting of twin-bore highway tunnels with four driveways excavated in classⅡsurrounding rock. Finally, the principle of supporting was put forward for twin-bore highway tunnels with four driveways excavated in classes ⅠandⅡsurrounding rocks.

Keywords: model test   in-situ testing   support structure    twin-bore tunnel  
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