| 干砂盾构开挖面稳定性模型试验研究 |
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| 引用本文： | 陈仁朋,李君,陈云敏,孔令刚. 干砂盾构开挖面稳定性模型试验研究[J]. 岩土工程学报, 2011, 0(1) |
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| 作者姓名： | 陈仁朋 李君 陈云敏 孔令刚 |
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| 作者单位： | 浙江大学岩土工程研究所;软弱土与环境土工教育部重点实验室; |
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| 基金项目： | 国家自然科学基金项目(50629802); 国家重点基础研究发展计划(2007CB714001); 教育部新世纪优秀人才支持计划资助项目(NCET-08-0491) |
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| 摘 要： | 盾构技术在地下空间开发中得到广泛应用,保持开挖面稳定性是盾构施工的关键,但这方面的大尺寸模型试验研究一直很少。利用直径1 m的盾构模型,研究了干砂地层中不同埋深比(C/D=0.5,1.0,2.0)下盾构开挖面稳定性问题。试验中分析了埋深比对开挖面极限支护力及地表沉降的影响,揭示了开挖面稳定性与极限支护力及地表沉降的关系,提出同时监测控制开挖面土舱压力及地表沉降的重要性,并给出关键控制键参数。对确定开挖面极限支护压力有重要的指导意义。
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| 关 键 词： | 模型试验 盾构 开挖面稳定性 极限支护力 土拱效应 |
Large-scale tests on face stability of shield tunnelling in dry cohesionless soil |
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| CHEN Ren-peng,,LI Jun,CHEN Yun-min,KONG Ling-gang. Large-scale tests on face stability of shield tunnelling in dry cohesionless soil[J]. Chinese Journal of Geotechnical Engineering, 2011, 0(1) |
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| Authors: | CHEN Ren-peng LI Jun CHEN Yun-min KONG Ling-gang |
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| Affiliation: | CHEN Ren-peng1,2,LI Jun1,CHEN Yun-min1,KONG Ling-gang1,2(1.Institute of Geotechnical Engineering,Hangzhou 310058,China,2.MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,China) |
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| Abstract: | The shield technology has been widely used in underground construction.The face stability is the key problem in the shield tunneling.Large-scale model tests on the face stability of tunnels with the ratios of tunnel depth to diameter C/D = 0.5,1.0 and 2.0 are conducted in the dry sand.The influence of C/D on the ultimate support pressure and the settlement of ground surface are obtained.The support pressure decreases sharply with the increase of the face displacement.However,the settlement of the ground sur... |
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| Keywords: | model test shield tunnelling face stability ultimate support pressure soil arching |
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