| 土工格室柔性挡墙变形规律数值模拟研究 |
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| 引用本文： | 宋飞,许伟强,张鲁渝,蓬永刚.土工格室柔性挡墙变形规律数值模拟研究[J].岩土力学,2011,32(Z1):738-0744. |
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| 作者姓名： | 宋飞 许伟强 张鲁渝 蓬永刚 |
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| 作者单位： | 长安大学公路学院;四川华腾公路试验检测有限公司;中国航空港建设第九工程总队;西安市建筑工程总公司 |
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| 基金项目： | 陕西省自然科学基金青年项目(No.2010JQ7002);中国博士后科学基金资助项目(No.20100471591) |
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| 摘 要： | 土工格室柔性挡墙作为一种新型公路边坡支挡结构,在公路工程建设中具有广阔的应用前景。柔性挡墙墙背土压力与挡墙的变形形态及位移量大小密切相关。运用岩土工程有限元分析软件Plaxis研究了柔性挡墙在不同工况下的变形规律,计算分析了挡墙的高宽比、坡度以及路基表面荷载对于挡墙的变形性状的影响。研究结果表明,高宽比较大时,挡墙的水平位移量和自身的挠曲变形较大,墙背变形表现为外凸的抛物线形。随着高宽比的减小,挡墙的水平位移量和挠曲变形逐渐减小,墙背变形形态亦发生了变化;挡墙顶部的水平位移随着坡度的变小而迅速减小;随着填土表面荷载的增大,挡墙顶部的水平位移量逐渐减小,而总水平位移量和挠曲变形却逐渐增大。研究成果为柔性挡墙土压力计算方法的提出提供合理的理论依据,对于土工格室柔性挡墙的设计具有一定的参考价值。
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| 关 键 词： | 土工格室柔性挡墙 边坡支挡 变形规律 高宽比 坡度 表面堆载 |
| 收稿时间： | 2010-12-08 |
Numerical analysis of deformation behavior of geocell flexible retaining wall |
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| SONG Fei,XU Wei-qiang,ZHANG Lu-yu,PENG Yong-gang.Numerical analysis of deformation behavior of geocell flexible retaining wall[J].Rock and Soil Mechanics,2011,32(Z1):738-0744. |
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| Authors: | SONG Fei XU Wei-qiang ZHANG Lu-yu PENG Yong-gang |
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| Institution: | 1. School of Highway Engineering, Chang’an University, Xi’an 710064, China; 2. Huateng Limited Liability Company of Road Test Examination in Sichuan, Chengdu 611730, China; 3. The 9th General Team of Airport Construction of China, Chengdu 611430, China; 4. The General Construction Company of Xi’an, Xi’an 710063, China |
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| Abstract: | The geocell flexible retaining wall is a new type of retaining structures for the slope protection; and it is widely used in highway engineering. The earth pressure against flexible retaining walls is closely related to the mode and amount of wall displacement. By employing the FEM software Plaxis, the deformation laws of geocell flexible retaining wall under different conditions are investigated. The effects of height-width ratio, slope ratio and surcharges on the deformation behavior of the flexible retaining wall is computed and analyzed. The study results show that when the height-width ratio is relatively large, the amount of horizontal displacement and flexural deformation of the wall is also large. And the shape of the wall back is an outer convex parabola. With the decrease of the height-width ratio, the amount of horizontal displacement and flexural deformation of the wall reduces and the shape of the wall back changes in turn. The amount of horizontal displacement of the top of the wall is large when the slope is steep but rapidly decreases when the slope becomes gentle. With the increase of the surcharge on the surface of the slope top, the amount of horizontal displacement of the wall top gradually decreases; while that of total wall displacements and flexural deformation gradually increases. The study results in can provide theoretical basis for the evaluation of the earth pressures against the geocell flexible retaining wall and thus have reference value for the design of such retaining walls |
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| Keywords: | geocell flexible retaining wall slope supporting deformation behavior height-width ratio slope ratio surcharge |
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