RESEARCH ON ENGINEERING GEOLOGICAL PROPERTIES OF QUATERNARY LOOSE SAND IN THE FRONTAL AREAS OF ALTYN MOUNTAINS

By carrying out the laboratory shear tests of the different moisture content, in-situ shear and deformation tests. The results show that the sand stratum prones to disintegration and the shear strength is reducted along with the increase of the moisture content of specimens. Under the natural moisture content, the value of the laboratory shear strength is slightly higher than that of the in-situ test. The cohesive force are 0.160MPa and 0.157MPa individually. The internal friction angle are 37.8 and 36.4 individually. The in situ test results can be used to optimizing the design of the project. The uniformity of sand soil in working area is comparatively well and the deference of two modulus test values is small. The mean value of deformation modulus and Young's modulus are 122MPa and 242MPa individually.