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本文是结合交通部“水运工程抗震设计规定”的编写工作而进行的一部分研究成果。它以多年来国内外和我院以静力条件研究板桩岸壁的成果为基础,结合“7.28”唐山地震后对天津新港地区板桩岸壁的震害调查,同时参考日本等国外板桩岸壁的现场震害和振动模型试验的研究成果,根据振动状态下单锚板桩墙的动力特性和变形特点,用半经验半理论的静力法,对单锚柔性板桩墙的地震土压力及其计算方法进行探讨。用本文推导的动力增量曲线法与日本港湾技术研究所的振动模型试验和天津新河船厂板桩码头的抗震验算基本相近,比西德日本等国外规范经验性方法考虑因素全面,更能反映柔性板桩墙的动力特性。最后并分别根据单锚板桩墙不同的变形特点、施工方法和土质好坏,建议了不同的计算方法,可供板桩岸壁以进行抗震设计。
This article is part of the research work carried out in conjunction with the preparation of the “Seismic Design Regulations for Waterway Engineering” of the Ministry of Communications. It is based on the results of studies of the sheet pile bank wall at home and abroad and our institute’s static conditions, combined with the seismic damage investigation of the sheet pile bank wall of the Tianjin Xingang area after the “7.28” earthquake in Tangshan, and with reference to the offshore sheet piles in Japan and other countries. Based on the research results of field damage and vibration model tests, based on the dynamic characteristics and deformation characteristics of a single anchored pile wall under vibration, the semi-empirical semi-theory static method is used to calculate the seismic earth pressure of a single-anchor flexible sheet pile wall. The calculation method is discussed. The dynamic incremental curve deduced in this paper is basically similar to the vibration model test of the Japan Harbor Technology Research Institute and the seismic verification of the sheet-pile wharf of Tianjin Xinhe Shipyard. It is more comprehensive and more reflective than the empirically-appropriate considerations of Western Germany and other foreign countries. Dynamic Characteristics of Flexible Sheet Pile Walls . Finally, according to different deformation characteristics, construction methods and soil quality of single anchor plate pile wall, different calculation methods are proposed for the seismic stability of the sheet pile bank wall.