岩石力学与工程学报
巖石力學與工程學報
암석역학여공정학보
CHINESE JOURNAL OF ROCK MECHANICS AND ENGINEERING
2013年
1期
200-207
,共8页
孙发鑫%陈正汉%秦冰%方祥位%边诚%刘月妙%王驹
孫髮鑫%陳正漢%秦冰%方祥位%邊誠%劉月妙%王駒
손발흠%진정한%진빙%방상위%변성%류월묘%왕구
土力学%膨润土–砂%混合缓冲/回填材料%三向膨胀力%各向异性%体积率%经验模型
土力學%膨潤土–砂%混閤緩遲/迴填材料%三嚮膨脹力%各嚮異性%體積率%經驗模型
토역학%팽윤토–사%혼합완충/회전재료%삼향팽창력%각향이성%체적솔%경험모형
soil mechanics%bentonite-sand%buffer/backfilling materials%three-dimensional swelling pressure%anisotropy%volume fraction%empirical model
对不同干密度和含砂率高庙子膨润土–砂混合缓冲/回填材料的试样进行一系列三向膨胀力试验研究,结果表明,混合料三向膨胀力均随干密度呈指数关系递增,随含砂率呈指数关系递减.混合料存在各向异性,竖向膨胀力大于水平向膨胀力;含砂率和干密度均对试样的各向异性产生影响;当含砂率大于30%以后,含砂率的增加对其各向异性影响较小;混合料的各向异性随干密度的增大更加显著,并逐渐趋于稳定;对各向异性的机制进行分析,提出基于体积率的膨润土干密度这一指标,建立高庙子膨润土及其含砂混合料三向膨胀力的经验模型,并对模型进行验证和应用,研究成果可为高放废物深地质处置库中的缓冲/回填材料设计提供参考.
對不同榦密度和含砂率高廟子膨潤土–砂混閤緩遲/迴填材料的試樣進行一繫列三嚮膨脹力試驗研究,結果錶明,混閤料三嚮膨脹力均隨榦密度呈指數關繫遞增,隨含砂率呈指數關繫遞減.混閤料存在各嚮異性,豎嚮膨脹力大于水平嚮膨脹力;含砂率和榦密度均對試樣的各嚮異性產生影響;噹含砂率大于30%以後,含砂率的增加對其各嚮異性影響較小;混閤料的各嚮異性隨榦密度的增大更加顯著,併逐漸趨于穩定;對各嚮異性的機製進行分析,提齣基于體積率的膨潤土榦密度這一指標,建立高廟子膨潤土及其含砂混閤料三嚮膨脹力的經驗模型,併對模型進行驗證和應用,研究成果可為高放廢物深地質處置庫中的緩遲/迴填材料設計提供參攷.
대불동간밀도화함사솔고묘자팽윤토–사혼합완충/회전재료적시양진행일계렬삼향팽창력시험연구,결과표명,혼합료삼향팽창력균수간밀도정지수관계체증,수함사솔정지수관계체감.혼합료존재각향이성,수향팽창력대우수평향팽창력;함사솔화간밀도균대시양적각향이성산생영향;당함사솔대우30%이후,함사솔적증가대기각향이성영향교소;혼합료적각향이성수간밀도적증대경가현저,병축점추우은정;대각향이성적궤제진행분석,제출기우체적솔적팽윤토간밀도저일지표,건립고묘자팽윤토급기함사혼합료삼향팽창력적경험모형,병대모형진행험증화응용,연구성과가위고방폐물심지질처치고중적완충/회전재료설계제공삼고.
The paper presents an experimental and theoretical study of the Gaomiaozi bentonite-sand mixture. The result shows that the three-dimensional swelling pressure increases exponentially with the dry density,and decreases exponentially with the sand content. Anisotropy of swelling pressure is observed in the mixture and the vertical swelling pressure is greater than the horizontal swelling pressure. Both the sand content and dry density affect the anisotropy of the sample. When the sand content is at a lower range,the increase of the sand content has a more obvious impact on the anisotropy. When the sand content is above 30%,the increase of the sand content impacts it less. The anisotropy of the mixture becomes more obvious and gradually stabilized as the dry density increases. Using the index of bentonite dry density based on volume fraction,the three-dimensional swelling pressure empirical model of Gaomiaozi bentonite and its sand mixture has been established,which provided a basis for the buffer/backfilling materials design of deep geological repository of high-level radioactive waste.