本文關鍵詞： 側(cè)向土壓力 砌塊土坡 三維分析 極限平衡 擬靜力　出處：《巖土工程學報》2017年09期 　論文類型：期刊論文

【摘要】：在支擋結(jié)構(gòu)穩(wěn)定性設計中,基于側(cè)向土壓力系數(shù)的設計方法簡單易用,一直被廣泛用于實際工程中。已有側(cè)向土壓力系數(shù)主要在平面應變分析方法下計算獲得,忽略了三維空間效應的影響�；谌S邊坡穩(wěn)定分析方法,采用變分法獲得安全系數(shù)極值下對應的三維破壞機制,建立考慮三維效應的砌塊土坡側(cè)向土壓力計算方法,從而揭示三維效應對砌塊土坡側(cè)向土壓力大小的影響規(guī)律。提出的方法還考慮了砌塊與土摩擦作用力和水平地震力的影響。給定參數(shù)值,通過優(yōu)化計算獲得了不同長高比下的三維砌塊土坡水平土壓力系數(shù),以圖的形式給出便于使用。從計算結(jié)果可以發(fā)現(xiàn),在地震作用下,三維空間效應對側(cè)向土壓力的影響顯著,特別是對于垂直的支擋結(jié)構(gòu)。最后結(jié)合算例,通過與傳統(tǒng)的平面應變下側(cè)向土壓力結(jié)果進行對比分析,顯示了考慮三維效應的土壓力系數(shù)對支擋結(jié)構(gòu)穩(wěn)定性設計的重要性。
[Abstract]:In the stability design of retaining structure, the design method based on lateral earth pressure coefficient is simple and easy to use, and has been widely used in practical engineering. Based on the three-dimensional slope stability analysis method, the three-dimensional failure mechanism corresponding to the maximum value of safety factor is obtained by using variational method, and the calculation method of lateral earth pressure of block slope considering three-dimensional effect is established. Thus, the effect of three-dimensional effect on lateral earth pressure of block slope is revealed. The influence of block and soil friction force and horizontal seismic force are also taken into account in the proposed method. The horizontal earth pressure coefficient of three dimensional block slope with different ratio of length to height is obtained by optimizing calculation, which is easy to use in the form of diagram. From the result of calculation, it can be found that the effect of three dimensional space effect on lateral earth pressure is significant under earthquake action. Especially for vertical retaining structure. Finally, by comparing with the results of lateral earth pressure under plane strain, it shows the importance of earth pressure coefficient considering three-dimensional effect to the stability design of retaining structure.
【作者單位】： 河海大學巖土力學與堤壩工程教育部重點實驗室;江蘇省巖土工程技術(shù)工程研究中心(河海大學);揚州大學建筑科學與工程學院;
【基金】：國家自然科學基金重點項目(41630638);國家自然科學基金項目(51508160) 中央高�；究蒲袠I(yè)務費專項資金項目(2017B00814)
【分類號】：TU432

【相似文獻】

相關期刊論文 前3條

1 張明熠;;軟土地基上預制預應力圓筒風機基礎的側(cè)向土壓力研究[J];特種結(jié)構(gòu);2011年06期

2 莫暖嬌;;土釘墻側(cè)向土壓力分布研究[J];隧道建設;2006年03期

3 王保軍;周同和;郭院成;;特殊條件下基坑支護側(cè)向土壓力與穩(wěn)定性計算方法討論[J];河南科學;2012年09期

，

本文編號：1541081