| 土工织物与塑料排水板联合处理软基的效果分析 |
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| 引用本文： | 刘金龙,栾茂田,汪东林,王吉利.土工织物与塑料排水板联合处理软基的效果分析[J].岩土力学,2009,30(6):1726-1730. |
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| 作者姓名： | 刘金龙 栾茂田 汪东林 王吉利 |
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| 作者单位： | 1. 合肥学院 建筑工程系，合肥 230022；2. 大连理工大学 土木水利学院岩土工程研究所，大连 116024； 3. 安徽建筑工业学院 土木工程学院；合肥 230022；4. 中国科学院武汉岩土力学研究所，武汉 430071 |
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| 基金项目： | 安徽省高等学校省级自然科学研究项目与合肥学院引进人才启动基金 |
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| 摘 要： | 基于平面应变条件下的Biot固结理论，采用非线性有限元方法对土工织物加筋与塑料板排水联合使用处理软土路基的效果和机制进行了探讨。对比计算表明：在相同固结时间内加设排水板后路堤的竖向沉降大于无排水板情况下的相应值，路堤坡趾处的隆起变小，路堤的侧向位移也变小。塑料排水板极大地缩短了孔压的消散时间，加快了软土的固结进程，使软土地基的承载力得到较快的提高，从而提高了路堤的稳定性。加设排水板后筋材所分担的抗拉力也比无排水板情况下的抗拉力低。为了更好地发挥土工织物的加固效果，土工织物应尽量布置在高应力区域。加设排水板可以缩短路堤各固结阶段的静置时间而达到优化设计。
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| 关 键 词： | 非线性有限元 土工织物 塑料排水板 软土路基 固结 |
| 收稿时间： | 2007-08-27 |
Effect of disposing soft soil foundation using geotextile and plastic drainage plate |
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| LIU Jin-long,LUAN Mao-tian,WANG Dong-lin,WANG Ji-li.Effect of disposing soft soil foundation using geotextile and plastic drainage plate[J].Rock and Soil Mechanics,2009,30(6):1726-1730. |
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| Authors: | LIU Jin-long LUAN Mao-tian WANG Dong-lin WANG Ji-li |
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| Institution: | 1. Department of Civil Engineering, Hefei University, Hefei 230022, China; 2. Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, China; 3. School of Civil Engineering, Anhui Institute of Architecture and Industry, Hefei 230022, China; 4. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | Based on Biot′s consolidation theory under plane strain, the effect of disposing soft soil foundation using geotextile and plastic drainage plate is studied with nonlinear finite element method. It is shown that the vertical settlement of foundation with drainage plate is larger than that without drainage plate; the lateral displacement decreases and the uplift at the toe of embankment decreases at the same consolidation time. In general, the dissipation time of excess pore pressure is shortened greatly by using plastic drainage plate; the stability of embankment is improved for accelerating the consolidation so as to enhance the bearing capacity of soil. Meanwhile, the shared tensile force of geotextile becomes lower when plastic drainage plate is used. In order to reinforce the embankment effectively, it is advised that geotextile should be set on high-stress zone. Furthermore, the design can be optimized by shortening the standing time of consolidation when plastic drainage plate is used. |
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| Keywords: | nonlinear finite element method geotextile plastic drainage plate soft soil foundation consolidation |
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