排水粉喷桩复合地基固结计算方法的探讨 English Version
Study of consolidation calculation of soft ground improved by dry jet mixing combined with vertical drain method
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摘要: 针对排水粉喷桩复合地基这种新型工法,建立了相应的简化固结分析模型;同时为考虑下卧层与加固区的孔压连续问题,将加固区模型一维等效,采用双层地基模型进行编程计算。两种模型得到的超静孔压消散规律,固结度增长规律以及沉降历时曲线均与现场实际情况相一致,验证了本文提出的加固区模型的适用性以及双层地基方法在排水粉喷桩复合地基固结计算中的可行性。Abstract: DJM(Dry Jet Mixing) combined with PVD(Plastic Vertical Drain) method was a new soft ground improvement method(2D method).A simplified consolidation calculation model of the ground improved by 2D method was presented,and the formulas of excess pore water pressure and consolidation degree were derived.Taking as double layer ground composed of composite ground and underlying layer,a consolidation calculation program based on consolidation theory was compiled for 2D method,which could represent the continuity of pore water pressure between the two layers.The comparison between the calculated results and the filed measured data showed that the calculated excess pore water pressure,the consolidation degree and the settlement-time relationship were consistent with those of field data respectively.
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Keywords:
- 2D method /
- consolidation /
- excess pore water pressure /
- double-layered ground
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