本文選題：力的分布 + 臨界狀態(tài)��； 參考：《巖土工程學(xué)報》2017年07期

【摘要】：邊坡在漸進(jìn)破壞過程中,力的分布和穩(wěn)定性分析是值得研究的。針對推移式和牽引式邊坡,分別提出了5種破壞機(jī)理,根據(jù)邊坡現(xiàn)狀特征,提出了5種推移式邊坡形式;定義了破壞方向,邊坡漸進(jìn)破壞的特征是處于峰值應(yīng)力狀態(tài)的地質(zhì)材料,遵循材料的破壞規(guī)律,且一步一步向前移動,一點一點發(fā)生破壞;在破壞區(qū),沿滑面的下滑力大于摩阻力,在臨界狀態(tài),材料所承受的應(yīng)力達(dá)到最大值,且矢量和等于零,在穩(wěn)定區(qū)和欠穩(wěn)定區(qū)下滑力等于摩阻力;在整個滑面,其壓力等于反力。對于條塊分析,邊坡漸進(jìn)破壞過程中,發(fā)生剪破壞時,臨界狀態(tài)存在力平衡,發(fā)生拉破壞狀態(tài)時,存在力矩平衡;兩種破壞形式在臨界狀態(tài)均是應(yīng)力達(dá)到材料的極限值,且矢量和為零。提出了抗滑防護(hù)措施的剛性、柔性和剛?cè)嵝栽O(shè)計,并指明了相應(yīng)的設(shè)置位置;定義了破壞率、破壞比、破壞面積比、力學(xué)破壞和工程破壞,并以此評價邊坡的破壞程度。分析了力在邊坡漸進(jìn)破壞過程中的規(guī)律,提出了傳統(tǒng)基于摩阻力和下滑力之比的穩(wěn)定性系數(shù)定義是值得商榷的。并以實例證明主推力法(或主拉力法)、綜合位移法、富余位移法和拉破壞法是可用于工程實踐的。
[Abstract]:In the process of progressive failure, the analysis of force distribution and stability is worth studying. In this paper, five failure mechanisms are put forward for the bedload slope and the traction slope respectively. According to the current characteristics of the slope, five kinds of displacement slope forms are put forward, and the failure direction is defined. The characteristic of progressive failure of slope is that the geological material in the state of peak stress follows the law of material failure, and moves forward step by step, and the damage occurs at one point; in the failure area, the sliding force along the sliding surface is greater than the friction force, and in the critical state, The stress of the material reaches the maximum value, and the vector sum is equal to zero, the sliding force in the stable region and the unstabilized region is equal to the friction resistance, and the pressure is equal to the reaction force in the whole sliding surface. For strip analysis, in the process of progressive failure of slope, there is force balance in critical state, moment equilibrium in tensile failure state, stress in critical state reaches the limit value of material. And the sum of vectors is zero. The rigid, flexible and rigid flexible design of anti-slide protection measures is proposed, and the corresponding setting position is pointed out, and the failure rate, failure ratio, failure area ratio, mechanical failure and engineering failure are defined, and the failure degree of slope is evaluated. The law of force in the process of progressive failure of slope is analyzed, and the traditional definition of stability coefficient based on the ratio of friction and sliding force is put forward. It is proved by examples that the main push force method, the synthetic displacement method, the surplus displacement method and the tensile failure method can be used in engineering practice.
【作者單位】： 湖北工業(yè)大學(xué)土木學(xué)院;三峽庫區(qū)地質(zhì)災(zāi)害防治工作指揮部;
【基金】：國家自然科學(xué)基金面上項目(41372363,41641027,50879044) 三峽后續(xù)工作地質(zhì)災(zāi)害防治項目(0001212015CC60005))
【分類號】：TU43

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【共引文獻(xiàn)】

相關(guān)期刊論文 前10條

1 盧應(yīng)發(fā);黃學(xué)斌;劉德富;;邊坡力的分布特征和穩(wěn)定性分析[J];巖土工程學(xué)報;2017年07期

2 王軍;;遺傳算法在土坡滑動面搜索和穩(wěn)定性評價中的應(yīng)用[J];湖南工程學(xué)院學(xué)報(自然科學(xué)版);2017年02期

3 賈玉躍;高毓山;;礦山開采誘發(fā)邊坡形變規(guī)律分析及控制對策[J];金屬礦山;2017年06期

4 續(xù)曉t，

本文編號：2053951