| 浅埋偏压隧道洞口坍方数值分析与处治 |
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| 引用本文： | 汪宏,蒋超.浅埋偏压隧道洞口坍方数值分析与处治[J].岩土力学,2009,30(11):3481-3485. |
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| 作者姓名： | 汪宏 蒋超 |
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| 作者单位： | 1.江苏科技大学 船海学院，江苏 镇江 212003；2.长沙市规划设计院有限责任公司 建一部，长沙 410007 |
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| 基金项目： | 江苏省教委自然科学基金项目 |
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| 摘 要： | 某公路隧道在进洞时出现坍方。针对该隧道工程的实际情况，建立数值分析模型，采用ANSYS程序模拟隧道施工力学行为，从围岩塑性区分布、位移以及锚杆和混凝土衬砌内力分布情况分析隧道变形和坍塌发生的原因。结果表明：隧道浅埋偏压、围岩力学性质差及施工支护不当导致坍方。结合工程实际提出洞内加固、地表注浆加固及开挖控制的综合处治方法，取得了理想的效果，为日后类似工程提供借鉴与参考。
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| 关 键 词： | 浅埋隧道 偏压 坍方 数值分析 |
| 收稿时间： | 2008-07-24 |
Numerical analysis of a collapsed portal for shallow tunnel under asymmetrical pressure and its treatment |
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| WANG Hong,JIANG Chao.Numerical analysis of a collapsed portal for shallow tunnel under asymmetrical pressure and its treatment[J].Rock and Soil Mechanics,2009,30(11):3481-3485. |
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| Authors: | WANG Hong JIANG Chao |
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| Institution: | 1. Institute of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China, 2. Department 1 of Architectural Design , Changsha Planning and Design Institute Co., Ltd., Changsha 410007, China |
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| Abstract: | During construction of the portal for a tunnel, collapse accident occurred. According to the field geological and construction conditions, the numerical model is set up; and the commercial software ANSYS is adopted to simulate the behaviors of the tunnel and surrounding rock. Based on the results of plastic zones in surrounding rocks, deformations in rock and lining, and the inner forces within rock bolts and reinforced concrete lining, the deformation of the tunnel and the causes of tunnel collapse are analyzed. The results show that: shallow tunnel bias, poor mechanical properties of rock and construction support landslides resulting from collapse. The comprehensive remedy measures consisting of reinforcement inside, surface grouting reinforcement and excavation control are proposed. Good results are achieved so as to offer reference for the future similar projects. |
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| Keywords: | shallow tunnel asymmetrical pressure collapse numerical analysis |
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