振动压实块石抛填层技术的初步理论分析

发布时间：2018-01-19 06:29

本文关键词： 振动压实块石抛填层液压振动锤理论分析　出处：《水利学报》2014年S2期 　论文类型：期刊论文

【摘要】：受工程进度所限,港珠澳大桥工程中拟采用液压锤振动压实的方法代替传统的水下强夯工艺以实现短时间内无死角地夯实块石抛填层的目的,但由于工程实例较少,可借鉴的经验少,在现场实施之前,需进行理论分析。本文建立了块石抛填层和振动压实系统的简化力学模型,通过数学推导,给出了振动压实系统对块石抛填层的做功公式,并对方程参数对做功的影响进行了分析,结果表明:系统做功随着系统质量、等效阻尼、激振力和角速度的增大而增大,同样改变幅度时角速度对应做功的改变幅度最大,等效阻尼最小;系统做功随着等效刚度的增大而减小。本文研究可以为振动压实块石抛填层技术提供理论支持,具有重要的理论和工程意义。
[Abstract]:Due to the progress of the project, the method of hydraulic hammer vibration compaction is proposed to replace the traditional underwater dynamic compaction technology in order to realize the purpose of ramming the rockfill without dead angle in a short time. But because the engineering examples are few and the experience can be used for reference, it is necessary to carry on the theoretical analysis before the field implementation. In this paper, the simplified mechanical model of the rock mass throwing and vibrating compaction system is established, and the mathematical derivation is carried out. The work formula of vibratory compaction system is given, and the influence of equation parameters on the work is analyzed. The results show that the work of the system is equivalent to the mass of the system. With the increase of the excitation force and angular velocity, the amplitude of the corresponding work is the largest and the equivalent damping is the least when the amplitude of the angular velocity is changed. The work of the system decreases with the increase of the equivalent stiffness. The research in this paper can provide theoretical support for the technology of vibratory compaction and rock throwing and has important theoretical and engineering significance.
【作者单位】：天津大学建筑工程学院;中交天津港湾工程研究院有限公司港口岩土工程技术交通行业重点试验室天津市港口岩土工程技术重点试验室;天津市软土特性与工程环境重点实验室;
【基金】：天津市软土特性与工程环境重点实验室开放课题基金项目(2013SCEEKL03)
【分类号】：U445.4
【正文快照】： 港口岩土工程技术交通行业重点试验室,天津市港口岩土工程技术重点试验室,天津300222;3.天津市软土特性与工程环境重点实验室,天津300222)1研究背景为促进香港、澳门和珠江三角洲西岸地区经济上的进一步发展,国家投资超700亿建设连通三地的港珠澳大桥工程。港珠澳大桥岛隧工程

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