• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International pipeline conference >GEOSYNTHETIC CLAY LINERS (GCLs)
【24h】

GEOSYNTHETIC CLAY LINERS (GCLs)

机译：土工合成粘土衬垫（GCLS）

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Geosynthetic Clay Liner's (GCLs) are an established sealing product in the geoenvironmental industry. They are used in landfill applications as caps and base liners, secondary containment for fuel storage facilities, as well as within various other containment structures such as dams, canals, rivers, and lakes. Rolled out like a carpet to provide a durable impermeable liner, Geosynthetic Clay Liners consist of a layer of high swelling sodium bentonite sandwiched between two geotextiles. Manufactured around the world in different techniques, the Canadian manufactured GCL, is mechanically bonded by needlepunching from one nonwoven geotextile through the bentonite to the other nonwoven or woven geotextile. The low hydraulic conductivity of the GCLs are used mainly as a replacement to thick, difficult to build compacted clay liners to provide a barrier to liquids and gases, offering both a technical and economical advantage. GCLs, with an average thickness of 7mm, offer a volume advantage over Compacted Clay Liners. They are more capable of withstanding freeze-thaw and wet-dry cycles; offer substantial construction cost savings in reduced on-site QC/QA and a quicker installation. Furthermore, GCLs offer equivalent or lower rates of release of fluids and chemicals than Compacted Clay Liners (CCLs). Bentonite is a clay mineral with expansive characteristics and low permeability, where montmorillonite is the chief mineral. Montmorillonite, swells when contacted with water approximately 900% by volume or 700% by weight. When hydrated under confinement, the bentonite swells to form a low permeability clay liner, the equivalent hydraulic protection of several feet of compacted clay. A relatively new engineering material for some, geosynthetic clay liners have been used extensively over the past two decades, and are finding increasing use in every sector of the environmental industry. This paper will review the technical properties of these materials, their documentation at the research level, their integrity as a sealing barrier and recent field applications in the pipeline industry. Further, because these materials are factory produced, their properties are predictable, assisting the engineer to design with a high confidence level. Technical properties and economical benefits are sure to further increase GCL installations around the world to protect our environment and more importantly our groundwater.
机译：土工合成泥土垫的（GCLs的）是在地质环境业界公认的密封产品。它们在垃圾填埋场的应用作为盖和底座衬里，用于燃料储存设施二级容器，以及各种其它容纳结构，例如大坝，运河，河流和湖泊内使用。铺开像地毯提供一种耐用的不可渗透的衬垫，合成粘土垫层包括高溶胀钠层的膨润土夹在两个土工布之间。在不同的技术在世界各地生产的，加拿大生产的GCL，被机械地通过膨润土到其它非织造或机织土工布从一个非织造土工布针刺粘合。的GCLs的的低水力传导率主要用作替换到厚，难以构建压实粘土衬垫提供屏障以液体和气体，既提供技术和经济优势。 GCLs的，具有7毫米的平均厚度，提供了一个体积优势压实粘土衬垫。他们更能够承受冻融和干湿循环;在减少现场QC / QA和更快的安装提供了大量节省建设成本。此外，提供的GCLs流体和化学物质比压实粘土衬垫（CCL的）的释放的等效或较低。膨润土是粘土矿物与膨胀特性和低渗透性，其中蒙脱石是主要的矿物。蒙脱石，膨润时按体积或重量700％与水约900％接触。在封闭条件下的水合，膨润土溶胀以形成低渗透性泥土垫，的压实粘土的几英尺等效液压保护。对于一些相对新型工程材料，土工合成泥土垫已经被广泛使用，在过去的二十年，并且发现在环保行业的各个领域越来越多地使用。本文将审查这些材料，在研究水平的文档，其作为在管道行业的密封屏障和最近的实地应用完整的技术性能。此外，因为这些材料是工厂生产的，它们的属性是可以预测的，协助具有高置信度设计工程师。技术性能和经济效益一定会在世界各地进一步提高GCL的安装，以保护我们的环境，更重要的是我们的地下水。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号