公路高填方路基软岩填料试验研究

Experimental Study on Soft Rock Filler of Highway High-filled Subgrade

以某公路工程高填方路基试验段为例,采用试验研究方法,就软岩填料的矿物组成、工程性能、压缩性能和抗剪强度等进行了系列试验.研究表明:软岩填料主要由黏土矿物组成;饱水条件下的软岩软化系数要高于干湿循环作用下的软化系数;压实度为0.96时的软岩压缩系数随着干湿循环作用基本保持不变;软岩的抗剪强度在前6次干湿循环作用下减小幅度更加明显,6次以后基本趋于稳定.

Taking a test section of high-filled subgrade in a highway project,the experimental study method is used to carry out a series of tests on the mineral composition,engineering properties,compression performance and shearing strength of soft rock filler.The study shows that the soft rock fillers are mainly composed of clay minerals. The softening coefficient of soft rock under the saturated conditions is higher than that under dry-wet cycles. The compression coefficient of the soft rock at a degree of compaction of 0.96 is basically not changed with the effect of the dry-wet cycle. The shearing strength of the soft rock decreases more significantly under the effect of the first 6 dry-wet cycles, and basically stabilizes after 6 cycles. The research achievements can be referred for the similar projects.