Analysis and discussion of different methods of artificial ice-high specimen preparation  

作　　者：ShuJuan Zhang Wei Ma ZhiZhong Sun HaiMin Du 

机构地区：[1]State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences

出　　处：《Research in Cold and Arid Regions》2014年第5期440-446,共7页寒旱区科学（英文版）

基　　金：supported by the Excellent National Key Laboratory Special Fund of China (No.41023003);the National Natural Science Foundation of China (No.41101068);the National Key Basic Research Program of China (973 Program) (No.2012CB026102);the project of the State Key Laboratory of Frozen Soil Engineering (No.SKLFSE-ZT-07)

摘　　要：Because ice-high foundation soil is widely distributed in permafrost regions,the correct preparation of ice-high specimens is of critical interest in engineering design for foundation stability.Past research has shown that the uniaxial compression strength of ice-high frozen soils changes as the ice or total water content increases; the differences of different methods of specimen preparation are analyzed here and the advantages and disadvantages of them are presented.It is confirmed that the role of crushed ice is significantly different from that of naturally frozen ice in frozen soils,and the size and amount of crushed ice will influence the strength and deformation mechanism of frozen soils.Therefore,it is strongly recommended that when a ice-high specimen is artificially prepared,the ice should be frozen through natural means and not be replaced with crushed ice.Because ice-high foundation soil is widely distributed in permafrost regions,the correct preparation of ice-high specimens is of critical interest in engineering design for foundation stability.Past research has shown that the uniaxial compression strength of ice-high frozen soils changes as the ice or total water content increases; the differences of different methods of specimen preparation are analyzed here and the advantages and disadvantages of them are presented.It is confirmed that the role of crushed ice is significantly different from that of naturally frozen ice in frozen soils,and the size and amount of crushed ice will influence the strength and deformation mechanism of frozen soils.Therefore,it is strongly recommended that when a ice-high specimen is artificially prepared,the ice should be frozen through natural means and not be replaced with crushed ice.

关 键 词：ice-high specimen artificial preparation method STRENGTH DEFORMATION 

分 类 号：TU411[建筑科学—岩土工程] TU445[建筑科学—土工工程]