地下连续墙基础在日本的多样化发展

OVERVIEW OF THE VARIETY OF DIAPHRAGM WALL FOUNDATION DEVELOPED IN JAPAN IN RECENT YEARS

自20世纪60年代以来,日本大力发展地下连续墙技术,研发了适用于不同施工场地的工法和手段,在地下连续墙基础的材料、接头、施工机械和应用领域等方面都取得了巨大的进展。在对近年来日本地下连续墙的发展和动向总结的基础上,对日本地下连续墙的发展情况予以介绍:1)地下连续墙的多样化构造形式,其中涉及到了地下连续墙-桩复合地基新型构造形式;2)地下连续墙大量用于桥梁基础的发展状况;3)地下连续墙抗地震液化基础的机理及研究概况;4)近年来快速发展的钢制地下连续墙(NS-BOX)工法。

Since the diaphragm wall technique was brought to Japan in the 1960s,the diaphragm wall has been well developed and a series of breakthroughs have been made in materials,joints,machine and applications.By collecting and summarizing a great deal of Japanese references about diaphragm walls,this paper aimed to introduce the developing trend of the diaphragm wall technique in Japan.The main subjects introduced in this paper were：1） the variety in structure properties of diaphragm walls,and a new type of foundation for the composite foundation of diaphragm wall and pile;2） the applications of diaphragm walls in bridge foundations;3） the principle and the relevant research of diaphragm walls as a remedial measure against liquefaction induced by earthquake;and 4） a new type of construction method recently developed in Japan,named the NS-BOX diaphragm wall method.