深海沉積物的靜力特性研究
打開文本圖片集
中圖分類號：TU411.7 文獻標志碼：A 文章編號：2095-2945（2025）20-0060-05
DOI：10.19981/j.CN23-1581/G3.2025.20.013
Abstract：Toaddressthecomplex stratigraphicconditionsandunknownstrength characteristicsofdeep-seasediments inthe areaoftheSamarIsland-DavaoCrossingBridgeinthePhilippines，thestaticpropertiesofdeep-seasedimentswereinvestigated through in-situ soil direct shear tests to obtain the cohesive force c and internal friction angle Ψ of soils in different strata，and theresults showed that： the internal friction angle of the pulverized clay soil was 18° ，with a cohesive force of 138.1 kPa，the cohesionofthesandysoilwasnotobvious，andtheinternalfrictionanglewasconcentratedat29.9°＼～31.7°，andtheinternal friction angle of gravelly sand specimensreached 44.7° . concentrated in 29.9o＼～31.7°，and the internal friction angle of gravelintercalated sand specimen reached 44.7° .For soils with high cohesion such as clay，cohesion occupies an important position in shearstrengthForsoilswithlargerpartclesandlowercohesion，suchassandysoils，theangleofinteralfrictionisthemain factorindeterminingtheshearstrength.Theresultsofthestudycanprovideaparametricbasisforthesubsequentsimulationof the dynamic response of bridge pile foundation.
Keywords：direct shear test； shear strength；cohesion; internal friction angle; deep-sea sediments
薩瑪爾島-達沃跨海橋梁項目位于菲律賓群島，這一地區(qū)恰好位于歐亞板塊與菲律賓海板塊的交匯處，是全球地質(zhì)構(gòu)造最為復雜且地質(zhì)災害頻發(fā)的區(qū)域之一。（剩余5632字）