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填土地带和蓄水库区的截水墙通常采用某种类型的垂直墙。最常见墙的构筑形式是在开挖的沟槽中用泥浆护壁,然后回填粘土—膨润土、粘土—水泥、水泥—膨润土或粘土—水泥—膨润土类材料。在此类工程中,墙的施工技术、稳定性观测和使用寿命是关键。如果上述构筑达不到这些指标,则可采用与此相异或相辅的墙构筑方案,即单独利用土工膜或土工膜与上述一种或者几种标准填料相结合可确保工程更完善,环境更安全、可靠。本文介绍土工模阻隔墙的应用范围、施工工艺、土工膜的特性(重点在其抗渗透性能方面)、结论及对此类技术的综述。
The cutoff walls in landfills and reservoirs usually use some type of vertical wall. The most common form of wall construction is the use of mud retaining walls in excavated trenches, backfilled with clay-bentonite, clay-cement, cement-bentonite or clay-cement-bentonite. In this kind of project, the construction technology, stability observation and service life of the wall are the key. If the above-mentioned construction fails to reach these indexes, a different or complementary wall construction scheme may be adopted. That is, the use of a geomembrane or a geomembrane alone in combination with one or more of the above-mentioned standard packings can ensure a more complete project and the environment. Safer and more reliable. This article describes the application of geomembrane barrier walls, construction techniques, geomembrane characteristics (with emphasis on their anti-permeability properties), conclusions, and a review of these technologies.