7Kjellman W. Consolidation of clay by Means of Atmosphere Pressure [ J ]. Proceedings of a conference on soil stabilization, Boston: MIT press, 1952:258 - 263.
8Holton G R. Vacuum stabilization of subsoil beneath runway extension at Philadelphia inter - national airport [ J ]. Proe. of IV. ICSMFE, 1965:61 - 65.