土与不同桩侧表面粗糙度接触面剪切试验研究

Study on Shear Test between Soil and Pile Surface with Different Roughnesses

利用同济大学研制的大型多功能界面剪切仪,对上海地区黏性土与具有不同表面粗糙度混凝土接触面之间相互作用及力学特性进行了试验研究,由此模拟钻孔灌注桩桩侧不同粗糙度条件下侧摩阻力的发挥情况。通过试验研究,得到了接触面相互作用时切向位移与剪切应力之间的关系及其相关参数,发现粗糙度对于接触面上的力学特性有着重要的影响。

The large-sized multifunctional shear test instrument developed by Tongji University was employed to study the interaction and mechanical property on the contact interface between soil and pile surface with different roughnesses.The development of frictional resistance of bored pile with different roughnesses was simulated.Through the tests,the relationship between tangential displacement and shear strain and relative parameter was deduced.And it was concluded that the roughness has an important influence on the mechanical property of the contact interface.