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为了研究刚性桩复合地基的抗震性能,依据相似理论,建立几何相似比为1∶10的3×3刚性桩复合地基群桩模型,采用拟动力的试验方法,研制一套试验系统。通过在桩身粘贴电阻应变片、垫层中埋设应变片、砂箱外壁连接位移传感器等方法分别测出桩身应变、垫层变形值、砂箱位移,并对上述数值进行分析研究,得出刚性桩复合地基在地震作用下的响应规律,为刚性桩复合地基在抗震设防地区的应用提供理论指导。
In order to study the seismic behavior of rigid pile composite foundation, a 3 × 3 rigid pile composite foundation pile model with geometrical similarity ratio of 1:10 was established based on similarity theory. A test system was developed by using pseudo-dynamic test method. The strain of the pile body, the deformation of the cushion and the displacement of the sand box were measured respectively by inserting the strain gauge in the pile body, laying the strain gauge in the cushion layer and connecting the displacement sensor on the outer wall of the flask wall. The above numerical values were analyzed and studied. The response of rigid pile composite foundation under earthquake action provides theoretical guidance for the application of rigid pile composite foundation in earthquake-resistant fortification area.