侧限条件下钙质砂压缩和破碎特性试验研究

COMPRESSION AND CRUSHING BEHAVIOR OF CALCAREOUS SAND UNDER CONFINED COMPRESSION

对取自南沙群岛永暑礁附近海域的钙质砂进行了不同终止压力下的侧限压缩试验,指出钙质砂在侧限条件下的压缩特性与粘土类似,其原因是钙质砂在常压力作用下发生了颗粒破碎。同时,对所有试样在试验前后进行了颗粒大小分析试验,并用Hardin模型对其破碎进行了度量。

Calcareous sediments generally consist of the remains of marine organism, which tend to be crushed relatively easily under load, compared to terrigenous materials. Laboratory tests are carried out on calcareous sand taken from the South China Sea. and it is pointed out that the compression behavior of calcareous sand under one-dimensional compression is just similar to that of silt. The reason is that the particles are crushed under load. The samples are sieved before and after tests and the crushability of the sand is also quantified using Hardin model.