Experimental research on compression and collapsible characteristics of saline soil

Fine-grained saline soil is widely distributed in the western region of China. Studying compression and dissolution characteristics of salty soil can provide technical support for local engineering design. In this paper, deformation characteristics of saline soil were studied by nuclear magnetic resonance experiment,compression and dissolution test. Results showed that the compression coefficient was negatively related to the pressure and dry density. When dry density was small, e-lgp curve in the back was a straight line. As dry density growing, e-lgp curve became more and more gentle, and feature of straight line disappeared gradually. As pressure increased, compression coefficient reduced. The maximum collapsible deformation was 25kpa pressure under rho(d).=1.3,1.35g/cm(3) condition. As dry density added, load corresponding to the maximum amount of collapse increased. With growing of confining pressure, pore size decreased gradually. After pressure consolidation of 50, 100, 200, 300 and 500kPa, 99.85% of the pore size is distributed between 0-0.1 mu m.