Because the surface dry silty sand layer is thick and loose, it is general think that its bad compaction ability and low shear strength are the important factors restraining the desert petroleum engineering construction. 由于沙漠表面的干粉砂层厚且松散,一般认为其压实性能差、抗剪强度低,是制约沙漠石油工程建设的重要因素。