城市高架桥群桩基础沉降量计算评价

发布时间：2018-07-25 11:55

【摘要】：探讨城市高架桥群桩基础沉降量计算评价方法,为桩基沉降安全评价提供理论依据。在详细总结深厚软土层区群桩基础沉降的影响因素和目前工程中常用的沉降量计算方法的基础上,针对具体的工程实例采用等代墩基法、等效作用分层总和法、弹性理论法以及Flac 3D数值模拟方法分别计算了高架桥群桩基础的沉降量和应力位移场变化规律,并与实测数据进行对比分析。结果表明,采用弹性理论法和等代墩基法计算沉降量与实际吻合较好,等效作用分层总和法和数值模拟方法计算结果虽然偏大,但应用的范围较广。至少3种方法得到的沉降量均小于允许值,才能判定沉降量满足安全要求。
[Abstract]:This paper discusses the calculation and evaluation method of the settlement of the pile foundation of the urban viaduct, and provides the theoretical basis for the safety evaluation of the pile foundation settlement. On the basis of the detailed summary of the influence factors of the pile foundation settlement in the deep soft soil layer and the common settlement calculation method in the project, the equivalent function is used for the concrete engineering examples. The layer sum method, elastic theory method and Flac 3D numerical simulation method are used to calculate the variation of the settlement and stress displacement field of the high bridge pile group, and compare with the measured data. The results show that the calculation of the settlement by the elastic theory method and the equivalent pier base method is good, and the equivalent effect stratification method and number are calculated. The calculation results of the value simulation method are large, but the scope of application is wide. At least the settlement amount obtained by the 3 methods is less than the allowable value, and the settlement can be judged to meet the safety requirements.
【作者单位】：西南交通大学经济管理学院;成都交通投资集团;西南交通大学土木工程学院;高速铁路线路工程教育部重点实验室;中国地质大学工程学院;
【分类号】：U443.15

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