薬液浸透注入工法による既設構造物直下の液状化対策技術 : 水平方向現地注入実験結果(飛躍する耐震技術-実務への適用-)

概要

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The authors are developing a countermeasure against liquefaction combining following three New technologies : 1) Multiple Permeation Grouting Method, which is capable of grouting into multiple points in a sandy ground simultancously ; and 2) Silica Type Grouting Materials with durability and high permcability in sandy soils, and 3) Horizontal directional drilling method. This method is effective as a promising counter measure against liquefaction of ground beneath existing structures. This paper describes the results of grouting test on the site, and the results of the laboratory tests conducted on the samples recovered from the grouted soils. From the test results, it was found that 1) the grouting into expected points could be completed using a monitoring system adopted ; 2) the liquefaction strength of grouted soil are 2 to 3 times greater than the unimproved soil ; and that 3) the method is a promising countermeasure against liquefaction for existing structures.
社団法人地盤工学会の論文
2003-03-01