本文選題：擋墻 + 臨界深度��； 參考：《巖土力學(xué)》2017年02期

【摘要】：土壓力的分布及大小與擋墻的位移模式密切相關(guān)。擋墻后的填土處于主動(dòng)土壓力狀態(tài)時(shí),塑性臨界深度是設(shè)計(jì)時(shí)需要考慮的問(wèn)題。應(yīng)用極限分析上限原理,將彈性覆蓋層以下且與擋墻相鄰的三角形土體微元作為研究對(duì)象。推導(dǎo)了外力功率和內(nèi)能耗散功率,得到了擋墻在平移模式下塑性臨界深度的計(jì)算公式,推導(dǎo)過(guò)程中考慮了擋墻位移方向效應(yīng)。研究結(jié)果表明:朗肯等理論計(jì)算結(jié)果是推薦方法的一個(gè)特例。塑性臨界深度隨擋墻位移方向與水平面之間夾角、墻-土界面黏聚力和摩擦角以及填土黏聚力和內(nèi)摩擦角的增大而增大。但當(dāng)擋墻位移方向水平時(shí),塑性臨界深度與墻-土界面摩擦角無(wú)關(guān)。
[Abstract]:The distribution and magnitude of earth pressure are closely related to the displacement mode of retaining wall. When the fill behind the retaining wall is in the state of active earth pressure, the critical plastic depth is a problem to be considered in the design. Based on the upper limit principle of limit analysis, the triangular soil element under the elastic cover and adjacent to the retaining wall is used as the research object. The external force power and internal energy dissipation power are derived, and the formula for calculating the critical plastic depth of the retaining wall in the translational mode is obtained. The displacement direction effect of the retaining wall is considered in the derivation. The results show that Rankine and other theoretical results are a special case of the recommended method. The plastic critical depth increases with the increase of the angle between the displacement direction of the retaining wall and the horizontal plane, the cohesion force and friction angle between the wall and soil interface, and the cohesion force and the internal friction angle of the fill soil. However, when the displacement direction of retaining wall is horizontal, the critical plastic depth is independent of the friction angle of the wall-soil interface.
【作者單位】： 重慶大學(xué)土木工程學(xué)院;河北工程大學(xué)土木工程學(xué)院;中國(guó)石油天然氣股份有限公司西南管道分公司;重慶大學(xué)力學(xué)系;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(No.41472245,No.41602301,No.51378169,No.51508150)~~
【分類(lèi)號(hào)】：TU432

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本文編號(hào)：1795299