深层搅拌法在地震减灾中的应用（英文）  

Applications of Deep Mixing to Earthquake Disaster Mitigation

作　　者：北喆昌树 

机构地区：[1]Tokyo Institute of Technology

出　　处：《地震研究》2017年第1期29-34,共6页Journal of Seismological Research

摘　　要：在日本的陆地和海洋工程建设中,软质冲积粘土地基十分常见,这种地基的柔软及高压缩性容易引发沉降和失效。砂质土壤具有相对较好的抗压缩性能,但在地震作用下,松散和饱和状态的砂质土壤也会发生液化。日本每年发生许多地震,如1995年阪神地震及2011年日本东北大地震都引发了人道主义危机,导致了巨大的经济损失。发生在松散和饱和砂层中的液化效应,会引起基础设施的巨大损害。多年来,液化控制对减轻地震灾害的重要性一直被强调,开发了很多基于各种原理的地基加固技术以减轻地震灾害。其中,20世纪70年代,日本开发的深层搅拌法(DMN)作为原位水泥稳定技术之一,经常被用来改进粘性和砂质土壤。近期,网格类型的DMM还被用以防止的土壤液化,其中,网格由稳定的墙柱组成,在地震过程中通过限制土壤颗粒的运动以防止超孔隙压力的产生。改良方法的效果首先在1995年的阪神地震中被验证合理。本文简要介绍了深层搅拌法在防震减灾中的一些应用。In Japan, soft alluvial clay ground has frequently encountered in on land and marine constructions. The ground is so soft and compressible large settlement and failure can occur. Sandy soil has relatively better properties for compressibility, but liquefaction might happen during earthquakes in the case of loose and saturated condition. Many earthquakes occur each year in Japan, in which the 1995 Hyogoken - Nambu earthquake and the 2011 TShoku earthquake induced both a humanitari- an crisis and massive economic impacts. As liquefaction which occurs in a loose and saturated sand layer, inducing quite large damages of infrastructures, the importance of liquefaction mitigation has been emphasized to minimize earthquake disasters for many years. Many kinds of ground improvement techniques based on various principles have been developed for earthquake dis- aster mitigation. Among them, the deep mixing method （ DMM）, one of the in-situ cement stabilization techniques, was de- veloped in 1970s in Japan and has been often applied to improvement of clayey and sandy soils. Recently, the grid type of DMM has also been applied to prevent liquefaction, where the grid of stabilized column walls function to restrict generation of excessive pore pressure by confining the soil particle movement during earthquakes. The improvement effect of the method was first evaluated in the 1995 Hyogoken - Nambu earthquake. In this paper, some applications of deep mixing method to earth- quake disaster mitigation are briefly introduced.

关 键 词：深层搅拌法 地震 液化 减灾 

分 类 号：TU473[建筑科学—结构工程]