双层钢板约束混凝土钻井井壁力学性能数值模拟研究

ppropriated ADINA finite element system,models were built to make numerical simulations on mechanical characteristics of drilling shaft lining consisting of double steel sheet and confined concrete under confining pressure.The results show that,on the premise of the same used of steel,assume that rotio of the thickness of inner steel to outer steel is d1/d2,with the increase of d1/d2, binding effect between steel and concrete is strengthening, ultimate strength of composite shaft lining is increasing.So that, when concerned only about confining pressure, a large proportion of inner steel is more economic and rationality.