| 淤泥堤基上粉细砂排水垫层特性研究 |
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| 引用本文： | 王路军,李锐,卢永金.淤泥堤基上粉细砂排水垫层特性研究[J].岩土力学,2012,33(Z1):129-135. |
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| 作者姓名： | 王路军 李锐 卢永金 |
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| 作者单位： | 上海市水利工程设计研究院有限公司，上海 200061 |
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| 摘 要： | 在工程实践中，排水垫层厚度、渗透系数等设计参数高度依赖经验，建筑规范1]认为粉细砂不宜用于排水垫层。结合上海某围垦工程粉细砂排水垫层的实践与原位观测成果，借助于非线性有限元，对粉细砂排水垫层的特性进行研究，探讨垫层渗透系数、厚度、长度以及堤身相对透水性等主要因素对地基固结排水的影响。在此基础上，提出以导水系数作为垫层设计控制参数，并提出可以考虑以上几个主要因素的垫层设计公式，可为粉细砂取代中粗砂用于垫层设计及施工提供了技术支持。实践证明淤泥地基上利用粉细砂充填土工管袋作为排水垫层是可行的。
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| 关 键 词： | 软基 固结 粉细砂 排水垫层 导水系数 塑料排水带 |
| 收稿时间： | 2011-10-26 |
Study of characteristics of silty sand drainage mat of sea dyke on muck foundation |
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| WANG Lu-jun,LI Rui,LU Yong-jin.Study of characteristics of silty sand drainage mat of sea dyke on muck foundation[J].Rock and Soil Mechanics,2012,33(Z1):129-135. |
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| Authors: | WANG Lu-jun LI Rui LU Yong-jin |
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| Institution: | Shanghai Water Engineering Design & Research Institute Co., Ltd., Shanghai 200061, China |
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| Abstract: | In engineering practice design parameters of drainage mats for consolidation method,such as drainage mat thickness,permeability coefficient,etc,are highly related to engineering experience.Silty sand is not recommended for drainage mat by engineering design specifications.Based on the prototype measurement of a certain reclamation project in Shanghai,characteristics of silty sand drainage mats of sea dike on muck foundation are studied via nonlinear FEM;and the impact of key factors on consolidation,such as mat permeability coefficient,mat thickness,mat length and relative permeability of body,etc,is further studied.On that basis,it is put forward that using transmissibillity coefficient of drainage mat as control parameter for design.Thus,the relating design formula for drainage mat,covering those factors,is presented accordingly;and it provides technical support for the design of drainage mat by using silty sand instead of medium sand or coarse sand.It is found that using silty sand to construct drainage mat is feasible in some project. |
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| Keywords: | soft foundation consolidation silty sand drainage mat transmissibillity coefficient plastic drainage |
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