和內(nèi)摩擦角 φ 。試驗(yàn)結(jié)果表明，粉質(zhì)黏土的內(nèi)摩擦角為 18<sup>°</sup> ，黏聚力138.1kPa ；砂土的黏聚力不明顯，內(nèi)摩擦角集中在 29.9<sup>°</sup>～31.7<sup>°</sup> ，礫石夾雜砂試樣的內(nèi)摩擦角達(dá)到 44.7<sup>°</sup> ，對(duì)于黏土等具有較高黏聚力的土壤，黏聚力在抗剪強(qiáng)度中占據(jù)重要地位。而對(duì)于砂土等顆粒較大、黏聚力較低的土層，內(nèi)摩擦角則是決定抗剪強(qiáng)度的主要因素。研究結(jié)果可為后續(xù)橋梁樁基動(dòng)力響應(yīng)模擬提供參數(shù)依據(jù)。-龍?jiān)雌诳W(wǎng)" />

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深海沉積物的靜力特性研究

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中圖分類號(hào)：TU411.7 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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(dá)沃跨海橋梁項(xiàng)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(fù)雜且地質(zhì)災(zāi)害頻發(fā)的區(qū)域之一。（剩余5632字）

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