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首页> 外文会议>International Conference on Remediation of Chlorinated and Recalcitrant Compounds >Fine-Tuning Fracture Design to Meet Remedial Objectives
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Fine-Tuning Fracture Design to Meet Remedial Objectives

机译：微调骨折设计，以满足补救目标

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Background/Objectives. The form―the vertical vs. horizontal orientation, the extent, and the aperture―of hydraulic fractures determines their usefulness as remediation tools. Different forms can be created with different methods, but soil characteristics often favor one form over others. Prudent remedial project design exploits these characteristics. In heterogeneous soils, in situ stress still plays an important role but the local contrast of geotechnical properties as well as morphology of the heterogeneity can impact fracture form. For example, glacial till, which all too often is characterized as a homogeneous single unit or perhaps delineated into multiple units by grain size, typically contains pockets or lenses of distinct material (e.g., sand stringers) that extend laterally several meters as well as natural fractures that render a heterogeneous system. The lenses and natural fractures serve to transport fluids, and the resulting weathering over geologic time has established locally unique geotechnical conditions. More recently, these features facilitated the permeation of contaminants, and contaminants can be lodged within the lenses and fractures and within the surrounding matrix. Large sites can be of greater extent than the scale of glacial soil variation and so can encompass soils with widely varying natural characteristics. Successful management depends upon identifying the distribution of soil characteristics.
机译：背景/目标。形式 - 垂直与水平方向，范围和孔径的液压骨折决定了它们作为修复工具的有用性。可以用不同的方法创建不同的形式，但土壤特征经常有利于对他人的一种形式。谨慎的补救项目设计利用这些特征。在异质土壤中，原位应力仍然发挥着重要作用，而是岩土性质的局部对比以及异质性的形态会影响骨折形式。例如，冰川直到，这一切通常的特征在于均匀单位或者通过晶粒尺寸划定到多个单元中，通常含有不同材料（例如，砂串）的口袋或透镜，它们横向几米以及自然骨折，使异构体系。镜片和自然骨折用于运输流体，并在地质时间内得到的风化已经建立了局部独特的地质条件。最近，这些特征促进了污染物的渗透，并且污染物可以在透镜和骨折内并在周围基质内覆盖。大型部位比冰川土壤变异的规模更大，因此可以涵盖具有广泛变化的自然特性的土壤。成功的管理层取决于确定土壤特征的分布。

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