In order to reveal the change of shear strength of Marine fills under extreme environment,a series of direct shear tests were carried out on Dalian red clay,and the effects of water content and salt content on the shear strength of red clay were analyzed.Meanwhile,the curing effects of 2%,4%gypsum powder and 18%,20%,22%glutinous rice pulp on salt-containing red clay were analyzed.On this basis,the sensitivity of water and salt content,curing agent type and dosage to the shear strength of red clay was quantified.The results indicate that the water content of red clay is the primary factor influencing its shear strength.As the water content increases,the shear strength of red clay initially de-creases,then increases,and subsequently decreases.Furthermore,salt content also plays a role in affecting the shear strength of red clay.Low salt content can improve the shear strength of red clay properly,but excessive salt content can greatly reduce the shear strength of red clay.The curing effect of gypsum powder on salt-bearing red clay is relatively good,and with the increase of dry density,the shear strength of cured salt-bearing red clay will also increase.
关键词
海洋填土/直剪试验/抗剪强度/含水率/含盐量/固化剂/干密度
Key words
marine fills/direct shear test/shear strength/moisture content/salt content/curing agent/dry density
维普
万方数据