旁压试验测试多年冻土力学性质的探讨

Highway(2022)

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Abstract
针对多年冻土力学参数测试难题,采用旁压原位试验对青藏公路沱沱河至唐古拉山北麓段粉土和粉质黏土进行了现场测试,结果表明:多年冻土力学性质与土质、冻土类型、温度以及加压时间有关.该地区低含冰量粉质黏土极限压力为1.5~2.5 MPa,旁压模量为15~20 MPa;高含冰量粉质黏土极限压力为2.5~3.5 MPa,旁压模量为20~35 MPa;低含冰量粉土极限压力为1.5~3.0 MPa,旁压模量为15~35 MPa;高含冰量粉土极限压力为3.0~4.0 MPa,旁压模量为35~60 MPa.
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