本文選題：攔砂壩 + 泥石流沖擊力��； 參考：《人民黃河》2017年03期

【摘要】：泥石流沖擊力是攔砂壩發(fā)生沖擊破壞的主要原因,研究泥石流對(duì)攔砂壩的沖擊力,可為防止攔砂壩發(fā)生沖擊破壞及攔砂壩結(jié)構(gòu)優(yōu)化設(shè)計(jì)提供數(shù)據(jù)和技術(shù)支撐。影響泥石流沖擊力的因素眾多且各因素影響程度不同,選取泥石流漿體容重、排導(dǎo)槽坡度、排導(dǎo)槽進(jìn)口泥深3個(gè)主要因素進(jìn)行了敏感性分析;分別對(duì)3個(gè)因素設(shè)立3個(gè)水平,運(yùn)用正交試驗(yàn)設(shè)計(jì)原理,確立9組試驗(yàn)方案,分別進(jìn)行數(shù)值模擬,以關(guān)鍵點(diǎn)泥石流最大沖擊力為評(píng)價(jià)指標(biāo),基于試驗(yàn)結(jié)果,運(yùn)用極差分析和方差分析對(duì)以上因素進(jìn)行了分析;對(duì)泥石流漿體及塊石沖擊作用下攔砂壩的動(dòng)力響應(yīng)進(jìn)行了相關(guān)數(shù)值模擬。結(jié)果表明:排導(dǎo)槽坡度為影響沖擊力大小最顯著的因素,其次為排導(dǎo)槽進(jìn)口泥深、泥石流容重;泥石流漿體會(huì)對(duì)整個(gè)壩體產(chǎn)生沖擊作用,而塊石僅對(duì)壩體局部產(chǎn)生影響。
[Abstract]:The impact force of debris flow is the main reason for the impact failure of sand bar dam. Studying the impact force of debris flow on sand bar dam can provide data and technical support for preventing the impact damage of sand bar dam and optimizing the structure design of sand bar dam. There are many factors affecting the impact force of debris flow and the influence degree of each factor is different. Three main factors, including bulk density of debris flow slurry, slope of drainage channel and inlet mud depth of drainage channel, are selected for sensitivity analysis, and 3 levels are set up for each of the three factors. According to the principle of orthogonal test design, nine groups of test schemes were established, respectively, and the maximum impact force of debris flow at key points was taken as the evaluation index. Based on the test results, the above factors were analyzed by means of range analysis and variance analysis. The dynamic response of sand bar under the impact of debris flow slurry and rock block is numerically simulated. The results show that the slope of the drainage channel is the most significant factor affecting the impact force, followed by the inlet mud depth of the drainage channel, the bulk density of debris flow, the impact of debris flow slurry on the whole dam body, and the impact of rock block on the local part of the dam body.
【作者單位】： 臨沂大學(xué)土木工程與建筑學(xué)院;中國(guó)科學(xué)院成都山地災(zāi)害與環(huán)境研究所;
【基金】：“十二五”國(guó)家科技支撐計(jì)劃項(xiàng)目(2014BAL05B01) 中國(guó)科學(xué)院重點(diǎn)部署項(xiàng)目(KZZD-EW-05-01)
【分類號(hào)】：P642.23

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