Through spatial analysis and attribute statistic analysis of database , this paper got the forecasting distributive map of liquefaction degree and liquefaction disaster . through examples presented here , we can conclude that the technology has advantages in data management , analysis , and visual evaluation 文中通过实例，探讨了利用mapgis软件建立地震砂土液化数据库的过程，通过对数据库中相关数据层的空间分析，属性数据统计分析等，建立了砂土液化预测分区图、砂土液化灾害预测图。
The present paper , based on practice of dynamic compaction to eliminate sandy soil liquefaction on shi - an expressway , is presenting a penetrated analysis of working properties and mechanism of consolidation of dynamic compaction . some construction co - efficient have also been presented for reference in highway construction . meanwhile , in combination with the flat board static load tests , a simple and easy - to - look analysis model has been proposed for composite ground of macadam ( fly - ash ) the present paper concludes that dynamic compaction for treatment of sandy soil liquefaction is an effective approach 本文结合石安高速公路建设中采用强夯法处治砂土液化地基的工程实践，对强夯法的工作性状和加固机理做了剖析，对强夯施工参数提出了在公路领域中的选用特点和方法，同时，结合野外的平板静载试验，提出一个简单直观的碎石(粉煤灰)桩复合地基分析模型。
Based on some macroscopic evidences gained in actual earthquake fields and on a preliminary theoretical analysis , it has been pointed out that the rayleigh waves should be an essential cause of liquefaction for the fields beyond the epicentral region with saturated sand deposits at shallow depths ( 4 )首先介绍了提出rayleigh波是液化主因的背景，基于宏观震害资料的启示，提出了rayleigh波可能是造成砂土液化的主要动因的新见解。并用单相介质模型的总应力法，分析了rayleigh波可能产生的应力大小。
It is pointed out that the compression of water in saturated sand caused by the densification of sand during dynamic loading and the dilation trend of liquefied sand are related to this . a new mechanism of large post - liquefaction deformation of saturated sand is established . according to the mechanism of large post - liquefaction deformation and the reconsolidation volumetric strain formula , a post - liquefaction constitutive model had been put forward 摘要基于大变形机理以及文中提出的再固结体变公式提出了一个饱水砂土液化后本构模型，模型不寻求液化后整个加载过程中的应力应变反应，将液化后过程分成低强度段和强度恢复段两段来分别进行表达，因为低强度段应变产生于极小的剪应力作用下因此认为该段应变是必然会发生的，强度恢复段应变的大小取决于土体所受剪应力的大小。
Based on the super capability of gis , the paper discusses problems on layer management of related data , design of attribute tables , and data coding etc . the coefficient of the soil liquefaction resistance k and the coefficient of soil liquefaction hazard h are presented . the seismic sand liquefaction forecasting , liquefaction disasters forecasting , and prevention measures on liquefaction are also discussed . using the software of mapgis , the process of liquefaction database setup has been studied 本文基于gis在数据存储管理及可视化方面的强大功能，研究了适合gis环境的液化评价相关数据的分层管理，属性数据表设计以及图元编码等问题；并提出了土层抗液化指数k及砂土液化灾害指数h两个重要液化评价因子，在此基础上进一步研究了地震砂土液化预测、液化灾害预测以及防治处理信息系统建设等问题。
No matter what the relative density , confining pressure , liquefaction severities are , the post - liquefaction deformation will show the same characteristic . the factors mentioned above have their own affecting ways . a lot of tests have been done to investigate the reconsolidation characteristics of sand after dynamic loading 砂土液化后模量随应变增加而增大的特性与常规三轴试验中模量随应变增大而减小的特性不同，相对密实度、液化度、初始有效固结压力等都以特定的方式对影响着液化后的变形特性。
In the comprehensive fuzzy evaluation model of soil liquefaction , the following factors , such as earthquake intensity , spt counts , groundwater level and mean diameter of sand soil particle which affect the liquefaction of sand soil were considered , and the sketch map of trapezoid subordinate function was adopted and the subordinate function expression of each factor was given 在提出的砂土液化模糊综合评判模型中，通过综合地震烈度、标贯击数、地下水位和平均粒径等影响砂土地震液化的因素，采用梯形隶属函数并分别给出各因素隶属函数的表达式。
Since 1950s , changjiang water resources commission as well as other scientific research units have carried out engineering geological reconnaissance for large - scale cross structures and the whole route , meantime , researched special subjects , such as special soils ( expansive soil , loess ) , the canal section in coal mining area , regional structure stability , sandy soil liquefaction etc 自20世纪50年代迄今，长江水利委员会及其它科研设计单位对中线工程全线及大型交叉建筑物进行了工程地质勘察，同时对特殊类土（膨胀土、黄土） 、渠线过煤矿区、区域构造稳定性、砂土液化等专题进行了研究。
