淤泥减水后淤泥海砂混合料固化试验研究

为了研究物理力学性质接近工程要求的淤泥海砂掺合比,首先通过晾晒及掺入生石灰的方式对淤泥进行减水,找到易于破碎均匀的含水率,再按照不同质量比掺合且依据不同的试验规定进行制样,设计不同的养护龄期样品。在相对应龄期通过直剪试验、压缩试验、无侧限抗压强度试验以及渗透试验来甄选适合于工程实际的掺合比。结果表明:海砂与石灰土的掺合比为1∶2时,黏聚力基本达到峰值,内摩擦角随石灰土比重增加而减小,养护28 d后混合料接近低压缩性土,也满足对渗透要求低的工程。

Experimental Study on Solidification of Silt and Sea Sand Mixture after Water Reduction of Silt

In the sea embankment filling project,in order to find out the suitable mixing ratio of silt and sea sand,The methods of drying and adding quicklime was used to reduce the water content of the silt,and finds the moisture content which is easy to be broken and even. According to different quality ratio and different test regulations,samples are prepared,and different curing age is designed.In the corresponding age,direct shear test,compression test,unconfined compressive strength test and penetration test are used to select the appropriate mixing ratio for the actual project. The results show that the cohesion basically reaches the peak value,when the mixing ratio of sea sand and lime soil is 1:2,and the internal friction angle decreases with the increase of the proportion of lime soil. After curing for 28 days,it is close to the low compressibility soil,which also meets the engineering of low permeability requirements.