高强土工格室加筋砂地基模型试验变形分析

高强土工格室采用新型U形钉节点, 材料抗拉强度为传统格室的10倍左右. 将土工格室置于地基, 形成土工格室结构层, 针对纯砂地基和不同格室焊距的土工格室加筋砂地基进行多组模型试验. 分析试验所得荷载-沉降曲线, 结果表明土工格室加筋能明显提高地基承载力,减少地基沉降. 在一定范围内, 格室焊距越小, 加筋效果越明显. 将Winkler弹性地基梁计算方法运用于高强土工格室加筋砂地基沉降计算中, 得出弹性地基梁的有限长梁解, 通过试验所得实测数据较为精确地确定了计算所需参数; 对比试验和计算结果, 给出了高强土工格室加筋砂地基结构层变形计算方法, 并且得出高强土工格室这一新型材料的相关计算参数.

Deformation analysis of model test of sand foundation reinforced with high-strength geocell

High-strength geocell’s strength is about 10 times higher than ordinary geocell with the new screw joint of U shape. The foundation placed with geocell is called a structural layer. By analyzing the pressure-settlement (p-s) curves based on a series of model tests of pure sand foundation and geocell reinforcement foundation with different weld spacing, the test shows that geocell reinforcement can increase bearing capacity and reduce the settlement. Within a certain range, the effect of reinforcement increases with the decrease of the weld spacing. The theory of Winkler model is used in the settlement calculation of sand foundation reinforced with high-strength geocell to get a solution of finite-length beam on elastic foundation, accurately confirming parameters with the measured data from the experiment. The method of deformation analysis of structure layer reinforced with high-strength geocell and the relevant parameters of high-strength geocell are summarized by comparison of experimental and computational results.