| 干砂地层中盾构开挖面失稳模式及土拱效应试验研究 |
| |
| 引用本文： | 李君,陈仁朋,孔令刚. 干砂地层中盾构开挖面失稳模式及土拱效应试验研究[J]. 土木工程学报, 2011, 0(7): 142-148 |
| |
| 作者姓名： | 李君 陈仁朋 孔令刚 |
| |
| 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;铁道第三勘察设计院集团有限公司; |
| |
| 基金项目： | 国家重点基础研究发展计划(2007CB714001); 国家自然科学基金(50629802); 教育部新世纪优秀人才支持计划资助(NCET-08-0491) |
| |
| 摘 要： | 盾构开挖面的稳定直接关系到盾构施工的安全,而国内外关于开挖面失稳模式的大型模型试验研究却很少。利用直径1m的盾构模型,对干砂地层中盾构开挖面稳定性问题进行了研究。通过对开挖面前方土体应力状态变化的监测,从土体应力变化的角度,揭示了随着土拱的形成、发挥和发展过程,开挖面经历了局部失稳和整体失稳这样一个渐进破坏的模式。将试验结果和楔体模型计算结果进行对比,对计算模型参数的选取提出了建议。
|
| 关 键 词： | 模型试验 盾构 开挖面稳定性 破坏模式 土拱效应 |
Model test study of the failure mechanism of shallow tunnels in dry sands |
| |
| Li Jun,, Chen Renpeng, Kong Linggang. Model test study of the failure mechanism of shallow tunnels in dry sands[J]. China Civil Engineering Journal, 2011, 0(7): 142-148 |
| |
| Authors: | Li Jun Chen Renpeng Kong Linggang |
| |
| Affiliation: | Li Jun1,2,3 Chen Renpeng1,2 Kong Linggang1,2(1.Institute of Geotechnical Engineering,Zhejiang University,Hangzhou 310058,China,2.Key Laboratory of Soft Soils and Geoenvironmental Engineering of the Ministry of Education,3.The Third Railway Survey Design Institute Group Corporation,Tianjin 300251,China) |
| |
| Abstract: | A large-scale model test on the face stability of shield tunneling is conducted in dry sand with the shield diameter 1m.By monitoring the change of the stress state in front of the face,the formation and development of soil arching is identified,and the collapse occurs in two stages: local instability and global instability.Comparing the test results to the wedge model calculation results,the values of the model parameters are proposed. |
| |
| Keywords: | large-scale model test shield face stability failure mechanism soil arching |
| 本文献已被 CNKI 等数据库收录！ |
|
