CONSTRUCTION METHODS OF SAND MAT HAVING MULTI - LAYER STRUCTURE

摘要

PURPOSE: A double layer structure sand mat construction method is provided to secure the stability of entering equipment, to prevent local sinking, and to improve stability against a shear fracture by increasing bearing power. CONSTITUTION: A double layer structure sand mat construction method comprises the following steps. A first geotextile layer is spread on the base ground, and a first sand mat layer is filled up on the first geotextile layer. A second geotextile layer is spread on the first sand mat layer, and a second sand mat layer is filled up on the second sand mat. A synthetic fiber filter is used for at least the lower part of one layer between the sand mat layer and the second sand mat layer. [Reference numerals] (AA) Start; (BB) End; (S100) Step of spreading a first geotextile layer on the base ground; (S200) Step of forming a first sand mat layer on the first geotextile layer; (S300) Step of spreading a second geotextile layer on the fist sand mat layer; (S400) Step of forming a second sand mat layer on the second sand mat