大同--运城高速公路某软基复合地基检测结果分析

以山西大运高速公路某段软基处理为例,从挤密碎石桩的加固机理和破坏方式入手,通过对软基复合地基的原位测试结果分析,得出碎石桩不但提高了地基的承载力,增加了桩间土的强度,减少了地基沉降,而且消除或减轻了地基的液化,使复合地基承载力达到了设计要求,特别是为以后在高速公路修筑中的软基处理提供了参考资料.

Analysis of testing results of composite ground for a soft foundation in Datong-Yuncheng expressway

Taking the examples of the treatment for a soft foundation reinforced with densification by gravel piles in Datong-Yuncheng expressway in Shan'xi province, the testing results of the composite ground is studied. The reinforcing mechanism and destroying manner for the densification by gravel pile is discussed. The in-situ testing result for the composite ground of a soft foundation is analyzed. It is found that the reinforcing method, which uses densification by gravel pile to consolidate the soft foundation, not only improves the bearing capacity, increases the strength of the soil between piles and reduces the ground settlement, but also removes and reduces ground liquefaction. The bearing capacity of composite ground, which is handled with densification by gravel pile, achieves the designing request. In particular, it will provide reference data for treating soft ground in highway construction in the future.