某引水渠地基液化防治措施及边坡稳定分析

Study on preventive measures of foundation liquefaction of a diversion canal and its slope stability analysis

针对某引水渠吹填土地基由于地震液化、地基承载力较低而不能直接使用等问题,在满足地基土抗液化稳定性的前提下,结合原位测试资料,利用该地基土体的液化安全系数和日本技术标准确定了砂桩置换率。随后通过复合地基方法确定相关稳定计算参数,并采用极限平衡方法分析了挤密砂桩和振冲碎石桩进行地基处理时引水渠边坡的稳定性。通过对不同加固方案的比选,提出了合理的地基处理措施和方案。

The dredger fill foundation of a diversion canal cannot be directly used because of the low ground bearing capacity and potential earthquake liquefaction. On the basis of meeting the demands of anti - liquefaction, the sand - pile replacement ratio was determined according to the Japanese technical standard and liquefaction safety factor of foundation in combination with in - situ test data. And then, the related stability calculation parameters were obtained by composite foundation method, the stabili- ty of diversion canal slope reinforced by sand compaction piles and vibro - replacement stone column was also analyzed by limit equilibrium method. At last, the reasonable foundation treatment measures were provided through comparison of different reinforcement schemes.