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概括近年来在渡槽抗震研究方面的新进展,提出对渡槽结构抗震性能的初步评估应遵循的原则和渡槽抗震分析应考虑的若干关键问题,全面叙述了渡槽抗震分析中地震动参数的确定原则,大型多跨渡槽的计算范围,盆式支座的简化处理,动水压力的确定,桩土相互作用的简化处理等问题。以长江水利委员会设计院初步设计的南水北调中线穿黄渡槽为例进行抗震计算分析,指出了渡槽地基系统抗震薄弱部位和应采取的工程措施。
In this paper, the recent advances in aqueduct seismic research are summarized. The principles to be followed in the preliminary assessment of seismic performance of aqueduct structures and the key issues to be considered in aqueduct seismic analysis are summarized. The principle of determining seismic parameters in aqueduct seismic analysis is comprehensively described. The calculation range of large multi-span aqueduct, the simplification of basin bearing, the determination of hydrodynamic pressure and the simplification of pile-soil interaction. Taking the Yellow River aqueduct in the midline of South-to-North Water Diversion Project initially designed by Yangtze River Water Conservancy Commission Design Institute as an example, seismic calculation and analysis are carried out. The weak parts of seismic response of aqueduct foundation system and the engineering measures to be taken are pointed out.