| 王伟.浙江杭州地铁砂质地层深基坑土压力分析研究[J].矿产勘查,2020,11(5):1047-1052 |
| 浙江杭州地铁砂质地层深基坑土压力分析研究 |
| Soil pressure analysis of deep foundation pit in sandy staum of Hangzhou metro,Zhejiang Province |
| 投稿时间：2019-12-31 |
| DOI： |
| 中文关键词: 地质工程 地铁 深基坑 砂质地层 现场监测结果 土压力 杭州 浙江省 |
| 英文关键词: geological engineering,metro,deep excavation, sandy formation, field monitoring results, earth pressure, Hangzhou,Zhejiang Province |
| 基金项目:浙江省住房和城乡建设厅2018年建设科研项目(编号:2018K119)资助。 |
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| 中文摘要: |
| 按照考虑变形的深基坑土压力理论,土压力分布规律符合传统极限土压力理论,趋近于朗肯主动极限土压力,不可能趋近于零。通过对杭州地铁砂质地层深基坑土压力的实测数据发现,基坑某一深度范围的实测土压力结果趋近于零。分析研究认为由于基坑采取坑外降水措施后粉砂土体具有一定自稳性,当基坑变形较大时围护结构和土体发生一定范围的脱空,导致实测土压力趋近于零。 |
| 英文摘要: |
| Actually based on the earth pressure theory considering wall deflection for deep excavation, the distribution of earth pressure be able to approach to Rankine active ultimat earth pressure, is not able to approach to zero. The measured earth pressure datas in sandy ground of metro deep excavation is analyzed and researched, the field monitoring results of earth pressure approach to zero in certain deep. The reasons is that silt soil has self-stabiliy after dewatering and there are gaps between retainnig structure and soil mass when large deformation of retainning wall occur, result in earth pressure approach to zero. |
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