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    • 1. 发明授权
    • Construction of a fluid impermeable subterranean barrier wall
    • 流体不渗透的地下屏障壁的构造
    • US5947644A
    • 1999-09-07
    • US54621
    • 1998-04-03
    • David L. GibbonsGeorge P. Southwell
    • David L. GibbonsGeorge P. Southwell
    • C09K8/512E02D19/16E02D31/00E02D5/18E21B33/13
    • E02D31/00C09K8/512E02D19/16E02D2300/0006E02D2300/0037E02D2300/0042
    • A process is provided for constructing a fluid impermeable subterranean barrier wall in a permeable earthen material at an earthen surface. The process is initiated by excavating an earthen pit in the permeable earthen material. A gelable slurry is prepared including unconsolidated solids, an aqueous solvent, a crosslinkable polymer, and a polymer crosslinking agent. The unconsolidated solids have a bulk component consisting of a soil or a clay. The unconsolidated solids can also include a number of additive agents which enhance the performance of the gelable slurry, such as density control agents, mixing agents, permeability reduction agents, filtration control agents and strength loss reduction agents. The gelable slurry is placed in the earthen pit and gelled to substantial maturity. The resulting gel binds the unconsolidated solids present in the earthen pit to convert the gelable slurry to a gelled continuum of consolidated solids, which forms the fluid impermeable barrier wall in the earthen pit. In an alternate embodiment, a displaceable slurry formed from a liquid and unconsolidated solids is placed in the earthen pit ahead of the gelation solution. The gelation solution is subsequently placed in the earthen pit to displace at least a portion of the displaceable slurry. The gelation solution gels to substantial maturity in the earthen pit, binding the unconsolidated solids present in the earthen pit and forming the barrier wall.
    • 提供了一种在土层的可渗透的土层中构造流体不可渗透的地下阻隔壁的方法。 该过程是通过在可渗透的土层材料中挖掘一个土坑开始的。 制备可凝胶化浆料,其包括未固结的固体,水性溶剂,可交联聚合物和聚合物交联剂。 未固结的固体具有由土壤或粘土组成的散装成分。 未固结的固体还可以包括增加可凝胶化浆料的性能的许多添加剂,例如密度控制剂,混合剂,渗透性降低剂,过滤控制剂和强度损失减少剂。 将可胶化浆料放置在土坑中并凝胶化成大量成熟。 所得到的凝胶结合存在于土坑中的未固结的固体,以将可凝胶化的浆料转化成固化的固体的凝胶连续体,其形成土层中的流体不可渗透的阻隔壁。 在替代实施例中,将由液体和未固结的固体形成的可置换浆料置于凝胶化溶液之前的土坑中。 然后将凝胶化溶液置于土坑中以置换至少一部分可置换浆料。 凝胶溶液在土坑中凝固成显着成熟,结合存在于土坑中的未固结的固体并形成阻挡壁。