格室作用机理.ppt

土 工 格 室 工 作 机 理 承载能力破坏机理 承载能力破坏机理 故障预防机制 Important Factors 重要的因素 重要因素 重要原因 负荷分配系统 负荷分配系统 负荷分配系统 负载支持设计图表 泥煤坑部分截面的荷载试验 泥煤坑荷载-挠度曲线 大型三轴试验的结果 莫尔建模格室-土复合 路面循环载荷试验 典型的循环负载测试结果 硅 砂 下 循 环 加 载 试 验 剪切盒测试结果 水 / 重力问题 解 决 办 法 格室斜率曲线 Geoweb Slope Curves 解 决 办 法 解 决 办 法 墙体破坏模式 解 决 办 法 堆叠式格室加强 集 料 的 流 动 阻 力 shear and spread laterally causing the vehicle to become immobile. However, if we can prevent the soil from shearing and develop a relatively stiff support system, we have created stability. This is what we can do with the Geoweb system. The Geoweb material must have sufficient wall strength and joint strength to resist the shear forces as well as construction loading during the infilling process. The wall to infill interaction must be high so the infill stays in the cell under loading. The cell area must be sized correctly to avoid infill failure within the cell. The cell must have sufficient depth to provide the desired stiffness. If we look at the support system over a poor quality soil, when a load is applied to the surface, moments develop within the system. Those moments are resisted by the compacted infill. The infill provides the strength to the system, not the flexible container. However, the flexible container must be engineered. When we look at a loaded cell, we can see the support provided by surrounding cells. This too contributes to the ability of the system to rapidly distribute loads. Various tools are available to support the design process. This research was conducted in the geotechnical laboratory of the Royal Military College in Kingston, Ontario. There, a pit was fill with saturated peat. Over the peat, the Geoweb section was placed and infilled with gravel. Settlement plates were placed through the Geoweb section prior to its placement. A load beam was placed over the Geoweb section and loaded to failure. Deflection verses beam-load was plotted. The results illustrate that the Geoweb system supports much greater loading