Experimental Investigation of the Engineering Properties of Coarse Grain Embankment Fill Material with Accumulative Salt Effect by Adding Onsite Brine Groundwater

The purpose of this research is to study the accumulative effect repetitively adding groundwater on engineering properties coarse grain salinized embankment fill material. Large-scale compression and characteristics tests were carried out different salt content samples. Based laboratory test results, influence factors analyzed by with SO42– or CL–. With increase added water containing CL–, compressive deformation tested samples showed a trend dramatically increasing at beginning followed gradually decreasing, while collapse increased continuously. coefficient compressibility typical three-stage variation law, regardless type water. decrease in temperature (simulating cooling period during construction), excess resulted an expansion samples, shrinkage behavior was observed CL– Thus, obvious sample observed. addition Moreover, effects discussed from following perspectives: accumulation, distribution soil, interaction ions, dissolution soluble salt. It further shown that even small amount will have significant impact saline soil groundwater.