地震工程学报
地震工程學報
지진공정학보
China Earthquake Engineering Journal
2015年
1期
6-10
,共5页
唐小微%李涛%马玲%张西文
唐小微%李濤%馬玲%張西文
당소미%리도%마령%장서문
黏粒含量%抗液化%动三轴试验%循环应力比
黏粒含量%抗液化%動三軸試驗%循環應力比
점립함량%항액화%동삼축시험%순배응력비
clay content%anti-liquefaction%dynamic tri-axial test%cyclic stress ratio
现场和实验室观测表明，一定黏粒含量的砂土在一定条件下易发生动力液化的现象，且黏粒含量对砂土抗液化性能的影响较为复杂。通过 CKC 全数字闭环控制气动式三轴仪试验系统，对黏粒含量为0%、5%和10%的砂土进行动力三轴试验。结果表明，黏粒含量为5%时砂土的抗液化性能最差，并且黏粒含量对于孔压的发展具有较大影响。根据实验数据的分析，对砂土-黏土的混合土的液化和抗液化性能进行机理分析。
現場和實驗室觀測錶明，一定黏粒含量的砂土在一定條件下易髮生動力液化的現象，且黏粒含量對砂土抗液化性能的影響較為複雜。通過 CKC 全數字閉環控製氣動式三軸儀試驗繫統，對黏粒含量為0%、5%和10%的砂土進行動力三軸試驗。結果錶明，黏粒含量為5%時砂土的抗液化性能最差，併且黏粒含量對于孔壓的髮展具有較大影響。根據實驗數據的分析，對砂土-黏土的混閤土的液化和抗液化性能進行機理分析。
현장화실험실관측표명，일정점립함량적사토재일정조건하역발생동력액화적현상，차점립함량대사토항액화성능적영향교위복잡。통과 CKC 전수자폐배공제기동식삼축의시험계통，대점립함량위0%、5%화10%적사토진행동력삼축시험。결과표명，점립함량위5%시사토적항액화성능최차，병차점립함량대우공압적발전구유교대영향。근거실험수거적분석，대사토-점토적혼합토적액화화항액화성능진행궤리분석。
Field observations and laboratory studies indicate that sand with a certain amount clay can be easily dynamically liquefied under certain conditions and that the amount of clay has a com-plex impact on the liquefaction resistance of sand.Using a CKC dynamic tri-axial test system,the liquefaction resistance of sand samples with different clay content (0%,5%,and 10%)was inves-tigated.The results show that the sand sample with 5% clay had the lowest liquefaction resist-ance;the generation of pore water pressure is obviously effected by the clay content.The liquefac-tion mechanism of the sand-clay mixture is explained according to the experimental results.
