水利水电科技进展
水利水電科技進展
수이수전과기진전
ADVANCES IN SCIENCE AND TECHNOLOGY OF WATER RESOURCES
2014年
4期
89-94
,共6页
饱和砂土%粉粒质量分数%黏粒质量分数%塑性指数%液化特性%综述
飽和砂土%粉粒質量分數%黏粒質量分數%塑性指數%液化特性%綜述
포화사토%분립질량분수%점립질량분수%소성지수%액화특성%종술
saturated sand%silt content%clay content%plasticity index%liquefaction characteristic%review
综述了国内外有关含粉粒饱和砂土和含黏粒饱和砂土液化特性的试验研究成果，对于含粉粒饱和砂土，粉粒质量分数、粉粒粒径和砂骨架颗粒级配对饱和砂土的液化特性影响显著，粉粒的存在或可以增加或降低含粉粒饱和砂土的动强度，或存在临界粉粒质量分数使饱和砂土的动强度随粉粒质量分数的增加呈非单调性变化；对于含黏粒饱和砂土，临界黏粒质量分数使饱和砂土的抗液化强度随粉粒质量分数的增大先减小再增大；黏粒的塑性指数对饱和砂土的抗液化强度有较大影响；不同颗粒组成的饱和砂土对塑性指数的反应不尽相同。
綜述瞭國內外有關含粉粒飽和砂土和含黏粒飽和砂土液化特性的試驗研究成果，對于含粉粒飽和砂土，粉粒質量分數、粉粒粒徑和砂骨架顆粒級配對飽和砂土的液化特性影響顯著，粉粒的存在或可以增加或降低含粉粒飽和砂土的動彊度，或存在臨界粉粒質量分數使飽和砂土的動彊度隨粉粒質量分數的增加呈非單調性變化；對于含黏粒飽和砂土，臨界黏粒質量分數使飽和砂土的抗液化彊度隨粉粒質量分數的增大先減小再增大；黏粒的塑性指數對飽和砂土的抗液化彊度有較大影響；不同顆粒組成的飽和砂土對塑性指數的反應不儘相同。
종술료국내외유관함분립포화사토화함점립포화사토액화특성적시험연구성과，대우함분립포화사토，분립질량분수、분립립경화사골가과립급배대포화사토적액화특성영향현저，분립적존재혹가이증가혹강저함분립포화사토적동강도，혹존재림계분립질량분수사포화사토적동강도수분립질량분수적증가정비단조성변화；대우함점립포화사토，림계점립질량분수사포화사토적항액화강도수분립질량분수적증대선감소재증대；점립적소성지수대포화사토적항액화강도유교대영향；불동과립조성적포화사토대소성지수적반응불진상동。
In this review, we present the main researches on liquefaction characteristics of saturated sand containing silt or clay. The research results show that silt content, silt particle size and sand grain composition have a great impact on liquefaction characteristics of saturated sand containing silt. The liquefaction resistance of saturated sand containing silt may increase or decrease as silt content increases. In some cases, there might exist a limit silt content such that the dynamic strength of sand containing silt changes non-monotonously as the silt content increases. For sand-clay mixtures, the liquefaction resistance initially decreases as the clay content increases and then turn to increase as the clay content continues to increase. Liquefaction characteristics of clay sand greatly relate to plasticity index ( PI) of clay particles. Sand in different grain composition situations may have different reactions to PI values of clay particles.
