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衡重式桩板挡墙是一种新型支挡结构。相比悬臂式桩板墙、桩锚结构等支护形式,其施工更方便,造价更低,且造型更美观。鉴于该结构的特殊性、复杂性及其构造上存在的多个可变因素,该结构的受力特性尚不明确。为此,基于相似理论,以衡重式桩板挡墙的一般形式为原型,通过多组几何比例7∶1的模型试验,研究了衡重式桩板挡墙结构的土压力分布模式。由试验结果得出:①卸荷板下土压力为零;②桩前抗力建议使用m法计算;③整体结构的受力模式与土压力计算模式。
Counterweight pile retaining wall is a new type of retaining structure. Compared with cantilever pile wall, pile anchor structure and other forms of support, the construction more convenient, lower cost, and more beautiful shape. In view of the structure of the particularity, complexity and structure of the existence of a number of variables, the structure of the force characteristics is not yet clear. Therefore, based on the similarity theory, taking the general form of the counterweight retaining wall as the prototype, the earth pressure distribution pattern of the wall structure of the counterweight type piled slab retaining wall was studied through several sets of model tests with geometrical ratio of 7: 1. From the test results, we can get: (1) The earth pressure under the unloading plate is zero; (2) The pre-pile resistance is recommended to be calculated by the m method; (3) The overall structure’s stress mode and earth pressure calculation mode.