| 不同处理方式软基的沉降特性现场试验研究 |
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| 引用本文： | 宋常军,李鹏,吴立坚.不同处理方式软基的沉降特性现场试验研究[J].路基工程,2019,0(4):45-49. |
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| 作者姓名： | 宋常军 李鹏 吴立坚 |
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| 作者单位： | 交通运输部公路科学研究院道路中心,北京,100088;交通运输部公路科学研究院道路中心,北京,100088;交通运输部公路科学研究院道路中心,北京,100088 |
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| 基金项目： | 交通部西部交通建设科技项目（200831822312-3） |
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| 摘 要： | 结合水泥土搅拌桩、超载预压以及袋装砂井联合堆载预压三种方式处治的滨海相软基，开展了系统的沉降变形原位试验研究。结果表明:施工期的软基沉降量与填高呈良好的线性关系，预压期的沉降量与时间符合双曲线关系。不同方式处理软基的沉降率与沉降速率显著不同。深层沉降量与埋深呈单指数衰减相关性；路堤临界高度应考虑下卧硬土层的影响。
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| 关 键 词： | 路堤工程 软基 沉降变形 现场试验 路堤临界高度 |
| 收稿时间： | 2019-11-07 |
Field Experimental Study on Settlement Characteristics of Soft Foundation with Different Treatment Modes |
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| Abstract: | A systematic in-situ test studies for settlement deformation of littoral facies soft foundation were carried out combined with that treated by such three modes as cement soil mixing pile, surcharge preloading and surcharge precompression combined with vertical drains method. The results show that there is a good linear relationship between the settlement of soft foundation and the filling height during construction period and the settlement in the preloading period is in line with the hyperbolic relation with time. The settlement rate of soft foundation treated by different methods are obviously different. The correlation between deep settlement and buried depth is single exponential attenuation. The critical height of embankment should consider the influence of underlying hard stratum. |
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