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首页> 外文会议>International symposium on deformation characteristics of geomaterials;IS-Seoul 2011 >Effect of geogrid-geomembrane geocomposites and geogrids on the failure mechanism of foundation over liquefied sand
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Effect of geogrid-geomembrane geocomposites and geogrids on the failure mechanism of foundation over liquefied sand

机译：土工格栅-土工膜和土工格栅对液化砂土地基破坏机理的影响

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This paper presents the results of a series of lg shaking table tests modeling a 4 story building foundation in different mitigation circumstances from the failure mechanism standpoint. Scale factor of the model is 1:25 and Firouzkooh sand was used as soil material which is bad-graded synthetic angular sand. Wet tamping method was adopted in model preparation and textile-like materials were used as geosynthetics. Failure mechanisms, foundation settlement and pore pressure build-up trends were the indicators of geosynthetics' performance. The failure mechanism is observed through a digital camera and analyzed based on a mesh of colored sand. Results show that the effectiveness of textile-like elements is related to their amount and location. Failure mechanism is different in various conditions. Reinforcing sand with geogrid- geomembranc geocomposites can reduce the settlement and change the pattern of soil movement due to liquefaction. Heavily reinforcing soil with geocomposites reduces settlement in deeper depths considerably but it can't increase bearing capacity of surface soil, therefore it can't decrease settlement of foundation because of its sinking into the soil.
机译：本文介绍了从故障机制的角度来看，在不同缓解情况下建模4层建筑基础的一系列lg振动台测试的结果。该模型的比例因子为1：25，Firouzkooh砂被用作土壤材料，是不良等级的合成角砂。模型制备采用湿夯法，类似纺织品的材料用作土工合成材料。破坏机制，地基沉降和孔隙压力累积趋势是土工合成材料性能的指标。通过数码相机观察故障机理，并根据有色沙子的网格对其进行分析。结果表明，类纺织品元素的有效性与其数量和位置有关。失效机制在各种情况下是不同的。用土工格栅-土工膜土工复合材料加固沙子可以减少沉降并改变由于液化的土壤运动方式。用土工复合材料大量加固土壤可显着减少更深深度的沉降，但不能增加表层土壤的承载力，因此，由于其沉入土壤中，因此无法减少地基的沉降。

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