Study on Confined Compression Test of Coarse-grained Limestone Soil
2020
WANG Qinyan | YAN Ming | LIANG Chunxiao | JIAO Longxin | SUN Yu
Taking the coarse-grained limestone soil as the research object, this paper carries out theconfined compression test for limestone soil with different coarse-grain content under 95%compaction and optimal moisture content, and studies the effects of P<sub>5</sub> content and P<sub>2-5</sub> content onengineering characteristics by analyzing the relationship curve between P<sub>5</sub> content and P<sub>2-5 </sub>content and sedimentation, compression modulus and void ratio. The results show that: when theP<sub>5</sub> content is less than 55%, the compression modulus increases slowly and the void ratio decreaseswith the increase of P<sub>5</sub> content; when the P<sub>5</sub> content is between 55% and 80%, the compressionmodulus increases rapidly and the void ratio almost doesn’t change with the increase of P<sub>5</sub>content;when P<sub>5</sub> content is more than 80%, the compression modulus changes slightly and the voidratio increases rapidly with the increase of P<sub>5</sub> content;with the increase of P<sub>2-5</sub> content, theskeleton effect is enhanced and E<sub>s</sub> is obviously increased when P<sub>5</sub> content is constant between 60%and 70%. The P<sub>5</sub> content plays a leading role in the engineering characteristics of coarse-grainedlimestone soil within a certain range.
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