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针对江苏某高速公路软土地基处理过程中的水泥搅拌桩下沉现象,通过现场测量桩周土中的超静孔隙水压力、土压力和剪切强度等,分析搅拌桩下沉机理,提出搅拌桩下沉的判别方法。超静孔隙水压力和土压力的现场测试结果表明,在搅拌桩下沉处,桩周土中的超静孔隙水压力大于土压力,桩周土出现了类似于液化的现象,可以以此作为搅拌桩下沉的判别方法。
Aimed at the phenomenon of cement mixing pile sinking in the process of soft soil foundation treatment of a expressway in Jiangsu Province, by analyzing the excess pore water pressure, earth pressure and shear strength in the surrounding soil of the pile, the sinking mechanism of the mixing pile is analyzed. Shen discrimination method. The results of field tests of the excess pore water pressure and earth pressure show that the excess pore water pressure in the soil around the pile is greater than the soil pressure at the subsidence site of the mixing pile and the phenomenon similar to liquefaction occurs in the soil around the pile and can be used as a mixing pile Sinking discrimination method.