排水与加筋复合型土工合成材料

介绍了一种既能排水又能加筋的新型土工合成材料,该材料可以应用于粘性土加筋土结构,起到减小孔隙水压力、提高稳定性的作用,通过进一步和传统的排水加筋土工材料相比较,阐叙了其排水加筋机理.同时还表述了该材料的各影响因素及其性能,此新型土工合成材料具有较好的应用前景.     

不同排水条件加筋红土三轴试验研究

以玻璃纤维和土工布作为加筋材料,对比研究红土在三种不同排水条件下加筋前后的抗剪强度特性.三轴试验结果表明:红土在完全固结排水条件下剪切,加筋能提高其抗剪强度,加筋层数越多,强度提高越大;在固结不排水条件下剪切,当加筋层数较少时,加筋后其抗剪强度反而比不加筋时降低,但随着加筋间距的减小,抗剪强度逐渐增大;而在完全不固结不排水条件下剪切,加筋降低其抗剪强度,且抗剪强度随围压的增大而减小.说明红土在不排水条件下加筋应慎重考虑.     

Treatment of sewage sludge using electrokinetic geosynthetics

The treatment and disposal of sewage sludge is one of the most problematical issues affecting wastewater treatment in the developed world. The traditional outlets for sewage sludge are to spread it on agricultural land, or to form a cake for deposit to landfill or incineration. In order to create a sludge cake, water must be removed. Existing dewatering technology based on pressure can only remove a very limited amount of this water because of the way in which water is bound to the sludge particles or flocs. Several researchers have shown that electrokinetic dewatering of sludge is more efficient than conventional hydraulically driven methods. This involves the application of a dc voltage across the sludge, driving water under an electrical gradient from positive (anode) electrode to negative (cathode) electrode. However, there have been several reasons why this technique has not been adopted in practice, not least because the, normally metallic, anode rapidly dissolves due to the acidic environment created by the electrolysis of water. This paper will describe experimentation using electrokinetic geosynthetics (EKG): polymer-based materials containing conducting elements. These have been used to minimise the problem of electrode corrosion and create a sludge treatment system that can produce dry solids contents in excess of 30%. It will suggest different options for the treatment of sludges both in situ in sludge lagoons and windrows, and ex situ as a treatment process.     

土工合成材料在软土地基中的应用

通过几个工程实例 ,说明在软土地基上铺放土工合成材料 ,可起到减小最大沉降、调整不均匀沉降和提高地基承载力的目的     

土工布与袋装砂井综合处理软土地基

结合厦漳公路的实例，较详细介绍了土工布与袋装砂井综合处理软土路基施工工艺、质量监控措施和加固效果。     

土工合成材料在公路软基处理中的应用与设计

结合<公路软土地基路堤设计与施工技术规范>和<公路土工合成材料应用技术规范>的规定,对土工合成材料在高等级公路软基处理中的应用设计中应注意的几个问题进行了初步探讨,同时对相关规范的理解和执行提出了建议.     

土工合成材料在改造旧水泥混凝土路面中的应用研究

介绍了玻纤格栅、土工布在沥青加铺层改造旧水泥混凝土路面中的应用实例 ,进行了理论分析、疲劳试验。结果表明 ,采用土工合成材料可有效地减少由荷载、温度、地基脱空等产生的不利影响 ,延缓原有水泥混凝土路面的接、裂缝在沥青混凝土加铺层中的反射 ,减少加铺层厚度 ,节省工程造价     

加筋土筋材长期荷载蠕变试验研究

对目前常应用于加筋土工程中的4种典型筋材－土工带、土工格栅、土工网、土工布,分别以20％、30％、40％和60％断裂荷载作为4个拉伸荷载水平,共16组,历时10000h的长期加载蠕变试验,得出了这些筋材的蠕变特性并将试验结果进行了计算机拟合,得出4种筋材在不同拉伸荷载水平作用下的蠕变方程,对加筋土工程设计,施工具有指导作用。     

"土袋"在日本软土地基加固中的应用与分析

近年来,土工合成材料在加筋土工程中得到了广泛的应用,目前常规的设计方法是在土层中水平布设加筋材料,如土工织物、土工网、土工格栅等.介绍了目前在日本应用的一种新的结构形式,即采用加筋材料包裹土体--"土袋"加固软土地基的方法,并从试验和理论两个方面介绍了土袋的加固机理.列举了土袋在日本铁路基床加固、房屋软土地基处理、修筑挡土墙及导流堤坝的应用实例.     

Laboratory tests of electro-osmotic consolidation combined with vacuum preloading on kaolinite using electrokinetic geosynthetics

Laboratory tests were conducted on kaolinite to investigate the effectiveness of electro-osmotic consolidation combined with vacuum preloading using electrokinetic geosynthetics (EKG). The results showed that the combined method could remove more water and induce larger surface ground settlements compared with the traditional vacuum preloading or electro-osmotic consolidation. Vacuum preloading was quite effective during the first 4?h, though the electro-osmotic consolidation took a main role in dewatering process after 9?h. The combined method could also hinder the development of cracks, induce higher negative pore water pressure and hence increase the efficiency of electro-osmotic consolidation. The results showed that deep electro-osmotic consolidation technique combined with vacuum preloading could result in significant water removal efficiency along with shorter electrode length. Furthermore, both electro-osmotic consolidation and the combined method could consolidate the soil efficiently with low energy consumption.