Analysis and research for uplift mechanism on foundation of transmission line towers in expansive soil
Yanjun Li · Rock and Soil Mechanics · 2006
On the base of the uplift model tests and prototype tests on foundation of transmission line tower,the uplift performance of expansive soil is deeply researched.The regularity of soil displacement,stress distribution,load capacity,failure mechanism were analyzed.The defect of existing uplift theory and calculation in clay is pointed out;this is that the failure of the soil is not only existing in cracking surface,but also existing entire soil body.Thus the composing of uplift bearing capacity is put forward that it is consisted of base weight,earth mass weight above the base,shear strength in the failure soil,and foundation bearing capacity caused by stress re-distribution owing to soil compressed;and then the FEM software is used for the analysis and validation.Finally,scale effect in the model tests is discussed.