论文部分内容阅读
珠海某一游艇港池垂直岸坡采用大直径薄壁筒桩作为悬臂水平支挡结构,岸坡最大高差达9m。在坡外开挖过程中,筒桩结构发生了整体破坏。该文根据实际工况进行复核,并结合Plaxis软件进行有限元数值计算,分析了该支挡结构失稳破坏的模式和原因。认为破坏的模式为倾覆破坏,筒桩整体刚度较大,桩体绕桩底以上某点转动倾倒。破坏主要原因是由于桩底大多位于淤泥层内,未嵌固于下卧较好的土层,而桩身水平抗弯承载力是可以满足要求的。计算结果与现场实际情况基本相符,并分析了其它导致破坏的不利因素。最后对加固方案设计提出了思路和建议。
Zhuhai, a yacht pool vertical bank slope with large-diameter thin-walled tubular pile cantilever horizontal support structure, the maximum height difference of 9m. In the process of excavation outside the slope, the pile structure has been destroyed as a whole. According to the actual conditions, the paper reviews the finite element numerical calculation with Plaxis software and analyzes the modes and causes of the destabilization failure of the retaining structure. It is considered that the mode of destruction is overturning and destroying, and the overall rigidity of the pile is relatively large. The pile body rotates and dumps around a point above the bottom of the pile. The main reason for the damage is that the bottom of the pile is mostly located in the silt layer and is not embedded in the soil layer under the well. The horizontal bending resistance of the pile body can meet the requirements. The calculation results are basically in line with the actual situation in the field, and other unfavorable factors leading to damage are analyzed. At last, the author puts forward the ideas and suggestions for the design of reinforcement plan.