侯琳 张红武 卜海磊

摘 要：国家重点科技研发计划专项黄河下游河道与滩区治理研究项目提出了异形钢结构组合桩技术，以达到中水河势稳定控制、输沙能力提升与特殊洪水行洪共适应的目的。鉴于钢结构板桩组合坝结构特殊，目前尚没有现成的完全配套的技术模型与规范可供参考，故根据示范工程总体布置要求与基本力学原理，结合工程环境、地质、水文等条件，采用加权方法体现基础对异形组合桩不同部位实际接触的多寡对板桩与管桩的抗倾覆影响作用，采用安全系数法对钢结构板桩组合坝示范工程进行稳定性计算，提出了一种适用于新型钢结构预制板桩组合坝的安全稳定性分析计算方法。计算结果表明，按实际面积加权计算出抗倾覆安全系数为1.43，略微小于规范要求的最小值1.50，为推荐算法。

关键词：异形板桩组合技术;倾覆稳定;计算方法;治河工程;黄河

Abstract：The special-shaped steel structure composite pile technology is proposed in the national key science and technology research and development plan of the lower Yellow River channel and beach area treatment research project， so as to achieve the purpose of the stability control of reclaimed water river regime， the improvement of sediment transport capacity and the common adaptation of special flood discharge. The structure of steel sheet pile composite dam is special， so there is no ready-made technical model and specification for reference. Therefore， based on the safety factor method， this paper put forward a safety and stability analysis and calculation method suitable for the new steel structure prefabricated sheet pile composite dam and calculated the overturning stability of the steel structure sheet pile composite dam demonstration project. According to the general layout requirements and basic mechanical principles of the demonstration project， combined with the engineering environment， geology， hydrology and other conditions， the weighted method was adopted to reflect the influence of the actual contact of different parts of the foundation on the anti-overturning of sheet pile and pipe pile. The calculation results show that the safety factor of anti-overturning is 1.43， which is slightly less than that of the minimum value of 1.50 required by the code.

Key words： special-shaped sheet pile combination technology; overturning stability; calculation method; river training project; Yellow River

1 引 言

1.1 研究背景

隨着人们认识的提高、科学理论的完善及现代科技的进步，黄河下游河道与滩区的治理技术得到长足发展[1]。近20 a来，黄河下游水沙条件、气候条件以及人类活动产生巨大变化，黄河下游依然存在河势多变、善淤善徙，大量被确定为国家基本农田的滩地不断坍塌，处于“豆腐腰”河段的堤段没有经受过洪水靠溜考验，质量差、隐患多[2]，同时社会上具有强烈的改善两岸滩区居民生产生活条件、提高黄河下游生态环境质量的需求[3-4]，使得人们对黄……