本文關(guān)鍵詞： 道路工程 地震 邊坡 永久位移 三維離散元　出處：《長(zhǎng)安大學(xué)學(xué)報(bào)(自然科學(xué)版)》2014年06期 　論文類型：期刊論文

【摘要】：針對(duì)地震動(dòng)作用下影響公路邊坡穩(wěn)定性的關(guān)鍵因素,采用三維離散元?jiǎng)恿憫?yīng)分析方法,建立了公路邊坡三維離散元模型,確定了動(dòng)力計(jì)算的主要參數(shù),選取不同坡高、坡度、巖層傾角以及不同地震波參數(shù)進(jìn)行組合,研究了公路邊坡在地震動(dòng)荷載作用下永久動(dòng)力位移的響應(yīng)規(guī)律。研究結(jié)果表明:在坡高10~70m范圍內(nèi),邊坡的永久動(dòng)力位移隨坡高的增大而單調(diào)增大;邊坡坡度在50°左右時(shí)永久位移達(dá)到最大;邊坡位移隨著地震波頻率增加而減少,當(dāng)頻率超過10Hz時(shí),邊坡位移隨頻率的增加變化不大,趨于穩(wěn)定;高烈度地震區(qū)路線邊坡設(shè)計(jì)應(yīng)控制邊坡高度,避免50°左右的邊坡坡度,宜選擇小于30°的邊坡設(shè)計(jì);基于三維離散元的邊坡永久動(dòng)力位移分析方法計(jì)算結(jié)果準(zhǔn)確可行。
[Abstract]:The earthquake under the action of the key factors affecting the stability of highway slope, using three-dimensional discrete element dynamic response analysis method, established the slope three-dimensional discrete element model, the main parameters of the power calculation to determine the selection of different slope height, slope, dip angle and different seismic wave parameters are studied, the seismic response of highway slope law of permanent displacement under dynamic loads. The results show that: in the high slope in the range of 10~70m, the permanent displacement of the slope with high power slope increases monotonically increases; slope at about 50 degrees when the permanent displacement reaches the maximum; slope displacement decreases with the increase of frequency of seismic wave, when the frequency is more than 10Hz, the slope with the increase of the frequency displacement changes little, tends to be stable; high intensity earthquake zone line slope design should be controlled to avoid the slope height, slope of about 50 degrees, should be less than 30 degrees In the slope design, the results of the analysis of the permanent dynamic displacement of the slope based on the three-dimensional discrete element method are accurate and feasible.

【作者單位】： 長(zhǎng)安大學(xué)特殊地區(qū)公路工程教育部重點(diǎn)實(shí)驗(yàn)室;林同h旯使こ套裳邢薰，

本文編號(hào)：1465938