碎石桩加固液化场地高桩码头抗震性能分析

Seismic performance of high-piled wharf improved by stone columns in ground of liquefaction

摘要:

针对经典离心机振动台试验,构建液化场地高桩码头三维数值模型,并验证数值模型的正确性。在此基础上,系统研究加固区距码头的距离、碎石桩直径和长度等参数对液化场地高桩码头加固效果的影响,揭示了不同加固参数下液化场地高桩码头变形受力规律。研究发现:液化场地高桩码头抗震性能与这些参数呈正相关,并且大直径和长尺寸碎石桩可以有效地控制地震过程中高桩码头的水平位移和桩身弯矩。研究工作对液化场地高桩码头地基加固具有重要借鉴意义。

Abstract:

A 3D numerical model for simulating the dynamic response of high-piled wharf in liquefaction ground was established and then used in the centrifuge shaking table test. On this basis, the influence of some parameters on the reinforcement effect of high-piled wharf in liquefaction ground were systematically studied, i.e., the distance between the reinforcement area and the wharf, the diameter and length of the stone column. Then, the deformation and stress law of high-piled wharf in liquefaction ground under different reinforcement parameters were revealed. The results showed that the seismic performance of high-piled wharf in liquefaction ground is positively correlated with these parameters; the stone column with large diameter and long size can effectively control the horizontal displacement and bending moment of high-piled wharf during earthquake. The research results of this paper are of great significance for the reinforcement of high-pile wharf foundation in liquefaction ground.