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粉喷桩处理淤泥质土及饱和黄土地基的应用研究
Study on Mud Ground and Saturated Loess Ground Treatment with Deep Jet Cement Pile

作  者: ; ;

机构地区: 长安大学

出  处: 《公路交通科技》 2005年第3期5-8,共4页

摘  要: 针对粉喷桩法在不同地区的软弱地基处理中的应用情况,文中选择两种典型土体———沿海地区淤泥质土和西北地区饱和黄土,通过有限元分析及现场实测,比较在不同的软弱地基中采用粉喷桩处理后形成的复合地基的受力特性。计算与实测结果均表明:支承式复合地基的桩土应力比大于悬浮式复合地基的桩土应力比;在相同置换率及荷载水平下,粉喷桩处理饱和黄土地基所得桩土应力比大于处理沿海地区淤泥质土所得的桩土应力比;柔性基础下复合地基的破坏模式应为桩间土体先破坏,继而引起整个复合地基的破坏,这正是柔性基础下复合地基与刚性基础下复合地基的不同之处。 In respect of the application of deep jet cement in different soft ground areas,the paper selects two typical soils——mucky soil and saturated loess in northwest China,and compares the stress property of the composite ground formed by deep jet cement in different areas through FEM analysis and in-situ test.The calculated and in-situ test results are as follow:first,the stress ratio of end-bearing pile composite ground is bigger than that of floating pile composite ground;second,the stress ratio in the saturated loess composite ground is bigger than that in the mud soil composite ground when they have same replacement ratio and load;third,the failure mode of the composite ground under the flexible foundation is resulted from the failure of the soil in the ground and this is different from the composite ground under the rigid foundation.

关 键 词: 粉喷桩 复合地基 受力性状

领  域: [交通运输工程]

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