冻结粉质砂土和衬砌混凝土接触面剪切强度试验研究

Experimental Study on Shear Strength of the Interface between Frozen Silty Sand and Lining Concrete

接触面抗剪强度是渠基土冻胀力作用的重要因素,会对渠道衬砌结构安全造成明显影响。通过室内试验的方式,探讨含水率、干密度、法向压力以及冻结时间等4个因素对北方寒区灌溉渠道冻结粉质砂土与衬砌混凝土接触面剪切强度的影响因素和变化规律。研究成果对农田水利渠道的设计和建设有借鉴与参考作用。

The shear strength of contact surface is an important factor for the frost heaving force of canal foundation soil,which will have a significant impact on the safety of canal lining structure.By means of laboratory test,this paper discusses the influencing factors and variation law of four factors,such as water content,dry density,normal pressure and freezing time,on the shear strength of the interface between frozen silty sand and lining concrete of irrigation channels in the northern cold region.The research results have important support and reference for the design and construction of farmland water conservancy channels.