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铝矿废料是铝矿土经高温细磨提取有用矿物之后的剩余产物。铝矿产业的飞速发展导致了大量铝矿业废料的产生,而随着公路交通运输业的飞速发展,每年又需大量路基填土及路面材料。本文分析了广西铝矿废料环境现状,对铝矿废料在公路工程中的应用进行探讨。 相似文献
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在系统分析红砂岩工程特性以及与水的相互作用关系的基础上，结合红砂岩路基的施工处理方法以及三种典型红砂岩高路堤的沉降观测结果的分析研究，探讨了红砂岩作为高路堤填料的可行性、施工方法的合理性以及不同红砂岩路基的沉降稳定性. 相似文献
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沈寿材 《闽西职业技术学院学报》2006,8(3):109-112
通过在广东省顺德甘竹滩大桥桥台软基处理中修筑EPS轻质填料路堤试验工程,探讨了软土地基上EPS轻质路堤设计、施工及质量控制中的相关技术问题,为EPS轻质填料路堤的应用积累了经验。 相似文献
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真空预压技术加固海堤深厚软基原型试验研究 总被引：4，自引：0，他引：4
真空荷载提供了一种减少堤坝软土地基固结时间的选择. 本文开展了一个海堤全断面的试验及原型观测研究. 试验堤高5. 5 m, 22 m深且三角形布置的塑料排水板作为竖向排水通道, 现场布置了水平测斜和沉降仪等观测仪器, 埋设在不同地基深度的孔隙水压力计用来量测真空-堆载联合荷载下的地基中超静孔隙水压力的变化. 通过场地条件分析、高真空度维持和真空卸载, 得到了系统的沉降变形和孔隙水压力资料, 试验结果验证了真空-堆载联合预压加固海堤软土地基的效果. 相似文献
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The effects of stabilizing piles on the stability of an embankment slope are analyzed by numerical simulation. The shear strength reduction method is used for the analysis, and the soil - pile interaction is simulated with zero-thickness elasto-plastic interface elements. Effects of pile spacing and pile position on the safety factor of slope and the behavior of piles under these conditions are given. The numerical analysis indicates that the positions of the pile have significant influence on the stability of the slope, and the pile needs to be installed in the middle of the slope for maximum safety factors. In the end, the soil arching effect closely associated with the space between stabilizing piles is analyzed. The results are helpful for design and construction of stabilizing piles. 相似文献
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基于三维颗粒流程序PFC3D,对北江大堤石角段存在争议的堤基管涌问题进行了数值仿真研究。在对实际管涌的堤基环境进行概化的基础上,建立了三维堤基的颗粒流模型,通过流固耦合分析,实现了堤基管涌发展以及颗粒流失全过程的模拟。对基岩不透水和透水2种情况分别建模,分析比较了不同的基岩透水边界条件下管涌演化的机理,通过FISH语言编程得到了不同基岩条件下颗粒流失量的变化规律。研究结果表明,基岩透水条件的存在,会加速管涌的演化,并可能导致更严重的破坏险情。砂土层细颗粒的迅速移出,会引起较大颗粒的流失,在覆盖层下发生接触冲刷,对堤基的稳定性构成威胁,且基岩的透水作用对砂土层的影响比卵砾石层更为突出。颗粒流模拟的结果反映了管涌演化的宏观现象和颗粒流失的细观规律,取得现场试验难以测量的颗粒流失规律,证明了颗粒流方法应用于管涌模拟的适用性,为进一步采用颗粒流方法研究管涌问题提供了新思路,对管涌的抢险加固具有一定的指导作用。 相似文献
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针对近十年来不断增多水力电站建设和城镇河畔围堤造地的现象及水力电站和围堤造地时水环境和生态环境所产生的影响作初步探讨,提出了一些生态补偿措施。 相似文献
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ZHOU Jianping 《天津大学学报(英文版)》2007,13(3)
Based on finite element (FE) method, an analysis program of geosynthetic-reinforcement embankments (GRE) is proposed. The improvement of stress field of surface layer of GRE after reinforcement can be indicated by this program. The comparison of failure area ratio of foundation soil before and after reinforcement is made, so that the efficiency of geosynthetic reinforcement under different soft soil properties can be shown. The embankment soil is simulated with Duncan-Chang model in this program, while reinforcement is modeled with linear elastic model and interface of reinforcement-soil by Goodman elements. Parameters about foundation soil, such as cohesion, inner friction angle and unit weight are considered, as well as three Duncan-Chang model parameters: modulus coefficient, bulk modulus coefficient and break ratio. The relationship between those soil parameters and failure area ratio indicate the reinforcement efficiency of GRE. The results show the cohesion and inner friction angle are the most important parameters for reducing the failure area,while modulus coefficient and bulk modulus coefficient, have little effect on the calculation results; the reinforcement efficiency is low if the cohesion and inner friction angle of foundation soil are too small or too big; different foundation soil will get different conclusions. The selection of model parameter is an important procedure for accurate modeling of GRE by numerical method. 相似文献