【摘要】：在現(xiàn)有相關(guān)研究基礎(chǔ)上,探討了無重土平地基Hill破壞模型及其承載力滑移線解和斜坡地基Hill破壞模型及其承載力滑移線解,提出臨坡條形基礎(chǔ)地基破壞模式應(yīng)是介于平地基破壞模式和斜坡地基破壞模式兩種臨界狀態(tài)之間的一種連續(xù)變化模式,在相同邊界條件下,改變坡頂距的臨坡地基極限承載力滑移線解答則是介于這兩種地基狀態(tài)間的一個(gè)連續(xù)函數(shù)解,并據(jù)此構(gòu)建出臨坡條形基礎(chǔ)無重土地基的雙側(cè)不對(duì)稱Hill滑動(dòng)破壞模式.在此研究基礎(chǔ)上,通過引入寬度比系數(shù)將基底分為兩個(gè)均布受壓區(qū),采用"等代自由面"簡(jiǎn)化邊坡面上滑塊的應(yīng)力影響作用,使臨坡一側(cè)受壓區(qū)極限壓力可直接用已有斜坡地基滑移線解表示.通過分析寬度比系數(shù)、坡頂距和破壞模式之間的關(guān)系,設(shè)定了寬度比系數(shù)函數(shù),建立出基于滑移線場(chǎng)理論的臨坡地基極限承載力確定方法.通過與現(xiàn)有研究成果的對(duì)比分析,表明了本文研究方法的可行性與合理性.
[Abstract]:On the basis of the existing research, the Hill failure model of flat foundation without heavy soil and its bearing capacity slip line solution, the Hill failure model of slope foundation and its bearing capacity slip line solution are discussed. It is proposed that the failure mode of slope strip foundation should be a continuous change mode between the failure mode of flat foundation and the failure mode of slope foundation. Under the same boundary conditions, the failure mode of strip foundation should be a continuous change mode between the failure mode of flat foundation and the failure mode of slope foundation. The slip line solution of ultimate bearing capacity of slope foundation with changing slope top distance is a continuous function solution between the two foundation states, and the bilateral asymmetric Hill sliding failure mode of slope bar foundation without heavy soil foundation is constructed. On the basis of this study, the basement is divided into two uniformly distributed compression regions by introducing the width ratio coefficient, and the stress effect of the slider on the slope is simplified by using the "equal generation free surface". The ultimate pressure in the compression zone on one side of the slope can be directly expressed by the slip line solution of the existing slope foundation. By analyzing the relationship between width ratio coefficient, slope top distance and failure mode, the coefficient function of width ratio is set up, and a method for determining the ultimate bearing capacity of slope foundation based on slip line field theory is established. Through the comparative analysis with the existing research results, the feasibility and rationality of the research method in this paper are shown.
【作者單位】： 湖南大學(xué)巖土工程研究所;湖南理工學(xué)院土木建筑工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51378198) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金資助項(xiàng)目(20130161110017)~~
【分類號(hào)】：TU470

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