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概要:
当社は(1)砂質地盤の多数の点に同時に注入可能な「超多点注入装置」，および(2)耐久性と浸透性に優れたシリカ系注入材料を用いて，従来工法では対応が難しい既設構造物の液状化対策技術の開発に取り組んでいる。本稿では大型土槽を用いた注入実験の概要とともに，液状化解析手法LIQCAを用いた改良範囲設計法について，タンク基礎地盤を例として述べる。
Abstract:
NKK are developing a countermeasure against liquefaction for
existing structures, combining following two new technologies
: (1)"Multiple Permeation Grouting Method", which
is capable of grouting into multiple points in a sandy ground
simultaneously ; and (2)Silica type grouting materials with
durability and high permeability in sandy soils. This paper
describes the test results of the grouting test using a
large container, and presents the design method of tank
foundation using a liquefaction analysis method, LIQCA.
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