| 摘要 |
<p>PROBLEM TO BE SOLVED: To shorten a hardening time inexpensively and easily draw out an earth retaining steel sheet pile after completing the work by placing a fluidized layer around a buried object, and constructing in order an earth and sand layer containing specific % of plaster, and upper layer parts on the fluidized layer. SOLUTION: A buried object 3 is laid under the ground surface 7, and the circumference is filled with fluidized soil so as to place a fluidized soil layer 1. Next, an earth and sand layer 2 containing plaster is provided, and when the earth and sand layer 2 has fixed strength, upper layer parts such as a roadbed 4, a subgrade 5, and pavement 6 are constructed. By containing cement in the earth and sand layer 2, depression or the like due to strength fall of plaster can be prevented from generating. By setting the plaster quantity contained in the earth and sand layer 2 to be 2-10%, and containing cement 5% or less, traffic can be opened in two hours after placing the fluidized soil layer. There is no possibility to be excessively raised in strength after burying so as to be hardly redrilled, and to cause strength fall even when it is exposed in water for a long term.</p> |
