摘要
文章结合贵广铁路白石绥江大桥水中墩采用钢围堰施工的工程实践,根据钢板桩围堰的实际受力状况建立了力学模型,对所要采取的钢板桩进行设计,并分析计算了钢板桩围堰抗倾覆、抗滑性能。结合现场实践经验对钢板桩围堰的施工准备、导向架的布设和插打钢板桩的施工工艺流程、钢板桩的施工质量控制措施、防渗漏措施、施工监测方法和钢板桩围堰的拆除等进行了阐述。其中对以下几方面内容进行了详细的总结,首先是钢板桩围堰施工过程中采取控制沉桩速度和垂直度等措施来保证钢板桩的准确合龙;其次是采取钢板桩锁口内设置黄油、钢板桩外侧设置堵漏导管、在未达到设计标高的钢板桩外侧钻孔注浆的措施保证钢板桩不渗漏;最后是钢板桩施工过程中采取的动态监控方法和钢板桩围堰的拆除方法。
Combining with the construction of piers in water of Suijiang bridge on Guiyang-Guangzhou railway using steel cofferdam, according to the actual stress state of steel sheet pile cofferdam, mechanic model is established, the steel sheet pile to be taken is designed , and the overturning resistance and slip resistance of steel sheet pile cofferdam are an- alyzed and calculated. Combined with the practical experience, the construction preparation of steel sheet pile coffer- dam, the guide frame layout and steel sheet pile inserted construction technology process, the steel sheet pile construc- tion quality control measures, measures of seepage prevention, construction monitoring method and steel sheet pile cof- ferdam demolition, etc are expounded. Among them, the following several aspects are summarized in detail, first, meas- ures such as pile driving speed and verticality control, etc. are taken to ensure accurate folding of steel sheet pile in the process of steel sheet pile cofferdam construction ; secondly, by using such measures as butter set within lock of steel sheet pile, plugging pipe set outside of steel sheet pile, drilling grouting outside the steel sheet pile which can not meet the design elevation, seepage from steel sheet piles is prevented; finally the dynamic monitoring method and the demolition method of steel sheet pile cofferdam are taken in the process of steel sheet pile construction.
出处
《高速铁路技术》
2013年第4期91-94,共4页
High Speed Railway Technology
关键词
钢板桩围堰设计
施工
导向架
防渗措施
监测
拆除
steel plate pile cofferdam design
construction
guide frame
seepage control measures
monitoring
demolition
