土体断裂韧度K_(IC)试验研究
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摘要
标准的三点弯曲试验,加荷方向与试样重力方向在同一条直线上,由于土体的抗拉强度很低,在进行土体的三点弯曲试验的时候,试样仅在自重的作用下就会断裂,即使不断裂,重力对测试结果也会产生很大的影响。根据三点弯曲的试验原理,将试样沿底边旋转90°,采用水平加荷的方式,使试样重力与加荷方向垂直,避开了重力对试验结果的影响,并使用自主研发的土体断裂装置测得了土体断裂韧度KIC。
Conventional three-point bending test,the loading direction and the gravity direction of the sample are in the same line.Because of the low tensile strength of soil,the sample will break only under the sample deadweight at the three-piont test of soil.Even if the sample is not broken,the deadweight will exert a great influence on the test results.According to the principle of three point bending test,the sample along the bottom edge to rotate 90°,by using horizontal loading way,the deadweight of sample is vertical to loading direction.In this way,the effect of gravity on the test results is avoided.The fracture toughness of soil is obtained by breaking assembly of soil which is independently developed.
Conventional three-point bending test,the loading direction and the gravity direction of the sample are in the same line.Because of the low tensile strength of soil,the sample will break only under the sample deadweight at the three-piont test of soil.Even if the sample is not broken,the deadweight will exert a great influence on the test results.According to the principle of three point bending test,the sample along the bottom edge to rotate 90°,by using horizontal loading way,the deadweight of sample is vertical to loading direction.In this way,the effect of gravity on the test results is avoided.The fracture toughness of soil is obtained by breaking assembly of soil which is independently developed.
引文
[1]蔡磊,邓英尔,肖冰峰,等.“5.12”地震后旋地泥石流形成条件及运动特征[J].地下水,2011,33(1):138-141.Cai Lei,Deng Yinger,Xiao Bingfeng,et al.Formation conditionsand dynamics characteristics of the Xuandi debris flow after the“5.12”earthquake[J].Ground Water,2011,33(1):138-141.
[2]杨为民,吴树仁,张永双,等.降雨诱发坡面型泥石流形成机理[J].地学前缘,2007,14(6):197-204.Yang Weimin,Wu Shuren,Zhang Yongshuang,et al.Research onformation mechanism of the debris flow on slope induced by rainfall[J].Earth Science Frontiers,2007,14(6):197-204.
[3]王伟,王华,许芝娟,等.降雨条件下黏性土坡微结构动态环境能场分析[J].西北农林科技大学学报,2010,38(3):229-234.Wang Wei,Wang Hua,Xu Zhijuan,et al.Analysis of microstructuredynamic environmental energy-field of clays-soil slope under rain-fall[J].Journal of Northwest Agriculture and Forestry Science andTechnology University,2010,38(3):229-234.
[4]李兆平,张弥.考虑降雨入渗影响的非饱和土边坡瞬态安全系数研究[J].土木工程学报,2001,34(5):57-61.Li Zhaoping,Zhang Mi.Effects of rain infiltration on transient safetyof unsaturaetd soil slope[J].China Civil Engineering Journal,2001,34(5):57-61.
[5]陈洪凯,鲜学福,唐红梅,等.坡面泥石流形成过程模型试验[J].湖南大学学报,2008,35(11):130-134.Chen Hongkai,Xian Xuefu,Tang Hongmei,et al.Modeling experi-ment on developing processes for debris flow on slope[J].Journalof Hunan University,2008,35(11):130-134.
[6]陈晓清,崔鹏,冯自立,等.滑坡转化泥石流起动的人工降雨试验研究[J].岩石力学与工程学报,2006,25(1):106-116.Chen Xiaoqing,Chui Peng,Feng Zili,et al.Artificial rainfall experi-mental study on landslioe translation to debris Flow[J].Chinese Jour-nal of Rock Mechanics and Engineering,2006,25(1):106-116.
[7]刘菲,唐红梅.重庆库区工程弃渣泥石流形成机理[J].重庆交通大学学报:自然科学版,2010,29(4):620-623.Liu Fei,Tang Hongmei.Formation mechanism of construction spoildebris flow in Chongqing reservoir[J].Journal of Chongqing Jiao-tong University:Natural Science,2010,29(4):620-623.
[8]Saada A S,Chudnovsky A,Kennedy M R.A fracture mechanicsstudy of stiff clays[C].Proceedings of 11th Intenational Confer-ence of Soil Mechnics and Foundation Engineering:2.San FranciSCO The united states committee of Internathoral society for soilmechanics and foundathon engineering,1985:637-640.
[9]Lee F H,Lo K W,Lee S L.Tension crack development in soil[J].Journal of Geotechnical Engineering,ASCE,1988,114(8):915-930.
[10]Harison J A.Fracure Toughness and Tensile Cracking of Soils[D].Kentucky:University of Kentucky,1993.
[11]Harison J A,Hardin B O,Mahboub K.Fracture toughness of compac-ted cohesive soils using ring test[J].Journal of Geotechnical Engi-neering,ASCE,1994,120(5):872-891.
[12]Chandler H W.The use of non-linear fracture mechanics to study thefracture properties of soil[J].Journal of Agricultural EngineeringResearch,1984(29):321-327.
[13]Hallett P D,Newson T A.A simple fracture mechanics approach forassessing ductile crack growth in soil[J].Soil Science Society of A-merica Journal,2001,65(4):1083-1088.
[14]丁金栗,刁玉椿,孙亚平.击实黏性土断裂韧度性质研究[J].水利学报,1990(7):55-60.Ding Jinli,Diao Yuchun,Song Yaping.Study of fracture toughness of com-pacted clay[J].Journal of Hydraulic Engineering,1990(7):55-60.
[15]张振国,丁金栗.黏性土体断裂韧度KIC研究[J].岩土力学,1993,14(3):47-52.Zhang Zhenguo,Ding Jinsu.Studies on the fracture toughness KIC ofcohesive soil[J].Rock and Soil Mechanics,1993,14(3):47-52.
[16]GB/T4161—1984金属材料应变断裂韧度KIC试验方法[S].北京:中国标准出版社,1984.
[2]杨为民,吴树仁,张永双,等.降雨诱发坡面型泥石流形成机理[J].地学前缘,2007,14(6):197-204.Yang Weimin,Wu Shuren,Zhang Yongshuang,et al.Research onformation mechanism of the debris flow on slope induced by rainfall[J].Earth Science Frontiers,2007,14(6):197-204.
[3]王伟,王华,许芝娟,等.降雨条件下黏性土坡微结构动态环境能场分析[J].西北农林科技大学学报,2010,38(3):229-234.Wang Wei,Wang Hua,Xu Zhijuan,et al.Analysis of microstructuredynamic environmental energy-field of clays-soil slope under rain-fall[J].Journal of Northwest Agriculture and Forestry Science andTechnology University,2010,38(3):229-234.
[4]李兆平,张弥.考虑降雨入渗影响的非饱和土边坡瞬态安全系数研究[J].土木工程学报,2001,34(5):57-61.Li Zhaoping,Zhang Mi.Effects of rain infiltration on transient safetyof unsaturaetd soil slope[J].China Civil Engineering Journal,2001,34(5):57-61.
[5]陈洪凯,鲜学福,唐红梅,等.坡面泥石流形成过程模型试验[J].湖南大学学报,2008,35(11):130-134.Chen Hongkai,Xian Xuefu,Tang Hongmei,et al.Modeling experi-ment on developing processes for debris flow on slope[J].Journalof Hunan University,2008,35(11):130-134.
[6]陈晓清,崔鹏,冯自立,等.滑坡转化泥石流起动的人工降雨试验研究[J].岩石力学与工程学报,2006,25(1):106-116.Chen Xiaoqing,Chui Peng,Feng Zili,et al.Artificial rainfall experi-mental study on landslioe translation to debris Flow[J].Chinese Jour-nal of Rock Mechanics and Engineering,2006,25(1):106-116.
[7]刘菲,唐红梅.重庆库区工程弃渣泥石流形成机理[J].重庆交通大学学报:自然科学版,2010,29(4):620-623.Liu Fei,Tang Hongmei.Formation mechanism of construction spoildebris flow in Chongqing reservoir[J].Journal of Chongqing Jiao-tong University:Natural Science,2010,29(4):620-623.
[8]Saada A S,Chudnovsky A,Kennedy M R.A fracture mechanicsstudy of stiff clays[C].Proceedings of 11th Intenational Confer-ence of Soil Mechnics and Foundation Engineering:2.San FranciSCO The united states committee of Internathoral society for soilmechanics and foundathon engineering,1985:637-640.
[9]Lee F H,Lo K W,Lee S L.Tension crack development in soil[J].Journal of Geotechnical Engineering,ASCE,1988,114(8):915-930.
[10]Harison J A.Fracure Toughness and Tensile Cracking of Soils[D].Kentucky:University of Kentucky,1993.
[11]Harison J A,Hardin B O,Mahboub K.Fracture toughness of compac-ted cohesive soils using ring test[J].Journal of Geotechnical Engi-neering,ASCE,1994,120(5):872-891.
[12]Chandler H W.The use of non-linear fracture mechanics to study thefracture properties of soil[J].Journal of Agricultural EngineeringResearch,1984(29):321-327.
[13]Hallett P D,Newson T A.A simple fracture mechanics approach forassessing ductile crack growth in soil[J].Soil Science Society of A-merica Journal,2001,65(4):1083-1088.
[14]丁金栗,刁玉椿,孙亚平.击实黏性土断裂韧度性质研究[J].水利学报,1990(7):55-60.Ding Jinli,Diao Yuchun,Song Yaping.Study of fracture toughness of com-pacted clay[J].Journal of Hydraulic Engineering,1990(7):55-60.
[15]张振国,丁金栗.黏性土体断裂韧度KIC研究[J].岩土力学,1993,14(3):47-52.Zhang Zhenguo,Ding Jinsu.Studies on the fracture toughness KIC ofcohesive soil[J].Rock and Soil Mechanics,1993,14(3):47-52.
[16]GB/T4161—1984金属材料应变断裂韧度KIC试验方法[S].北京:中国标准出版社,1984.
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