| 小净距大断面隧道合理净距研究 |
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| 引用本文： | 吴恒滨,张学富,周元辅,刘佳祥.小净距大断面隧道合理净距研究[J].重庆交通大学学报(自然科学版),2010,29(1):63-68. |
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| 作者姓名： | 吴恒滨 张学富 周元辅 刘佳祥 |
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| 作者单位： | 重庆三峡学院,建筑工程系,重庆,404000;重庆市城口县国土资源和房屋管理局,重庆,405900;重庆交通大学,土木建筑学院,重庆,400074 |
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| 基金项目： | 重庆市交通委员会科技计划项目(2006) |
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| 摘 要： | 小净距大断面隧道开挖跨度大,扁平率低,双洞相互影响显著,在施工过程中其施工力学性态及受力机理较普通隧道更为复杂。依托朝阳寺隧道下穿渝邻高速段工程,分析了围岩及支护结构的变形特性,引入屈服接近度概念对其受力进行评价,探讨了隧道不同近接施工力学变化规律,结果表明其较为合理的净距为1D～1.2D。通过强度折减法计算对比研究,结论与前述一致,由此提出一种新的适用于小净距大断面隧道净距选取原则。研究成果可为类似隧道设计及施工提供经验参考。
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| 关 键 词： | 小净距隧道 大断而隧道 施工特性 净距优化 屈服接近度 |
Reasonable Spacing of Closely Spaced Tunnels with Large Cross-Section |
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| Wu Heng-bin,ZHANG Xue-fu,ZHOU Yuan-fu,LIU Jia-xiang.Reasonable Spacing of Closely Spaced Tunnels with Large Cross-Section[J].Journal of Chongqing Jiaotong University,2010,29(1):63-68. |
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| Authors: | Wu Heng-bin ZHANG Xue-fu ZHOU Yuan-fu LIU Jia-xiang |
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| Institution: | 1. Department of Architectural Engineering;Chongqing Three Gorges University;Chongqing 404000;China;2. Chengkou County of State Land;Resources & Housing Administration;Chongqing 405900;3. School of Civil Engineering & Architecture;Chongqing Jiaotong University;Chongqing 400074;China |
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| Abstract: | The closely spaced tunnels with large cross - section have large excavation span,low flat rates and significant effect of two holes. The mechanical behavior and stress mechanism of closely spaced tunnels with large cross-section are more complicated than those of normal tunnels in construction. Based on the engineering project of Chaoyangsi tunnel which underpasses the Yu-Ling expressway,the deformation characteristics of supporting structure and the rock surrounding tunnel are obtained. Then the concept of... |
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| Keywords: | closely spaced tunnel tunnel with large cross-section construction characteristics distance optimization close proximity to yielding degree |
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