海上复合桩钢管打设施工技术

发布时间：2018-03-02 08:56

本文关键词： 连续梁桥桩基础复合桩钢管整体式导向架定位打设桥梁施工　出处：《桥梁建设》2014年02期 　论文类型：期刊论文

【摘要】：港珠澳大桥浅水区非通航孔桥采用85m连续组合梁桥形式,全长5 440m,共64孔,每墩均采用6根复合桩钢管,共372根,低墩区与高墩区桩径分别为2.0m和2.2m,连同替打段桩长总长超过60m。为满足复合桩钢管在涌浪较大海域施工精度要求,经比选采用整体式导向架法打设复合桩钢管。首先将导向架运至墩位处初定位,通过导向架调位系统进行二次定位,利用APE400B液压打桩锤插打4根定位桩;再将导向架固定在定位桩上,利用导向架微调装置进行第3次定位后,插打复合桩钢管到设计标高。施工中通过液压系统、导向装置、RTK定位测量及3次定位等技术确保了复合桩钢管的平面位置和倾斜度,复合桩钢管打设施工精度均满足该工程技术规范要求。
[Abstract]:The non-navigable bridge in shallow water area of Hong Kong-Zhuhai-Macao Bridge adopts 85m continuous composite beam bridge with a total length of 5,440 m and 64 holes. Each pier is made of 6 composite piles and 372 steel pipes. The pile diameters in low pier area and high pier area are 2.0 m and 2.2 m, respectively, and the total length of pile is more than 60 m. In order to meet the requirements of construction accuracy of composite pile steel pipe in the sea area with large surge waves, the total length of pile is more than 60 m. The composite pile steel pipe is set up by using the integral guide frame method. First, the guide frame is transported to the initial position of the pier, and the secondary positioning is carried out through the guide frame position adjustment system, and the APE400B hydraulic piling hammer is used to insert 4 positioning piles. Then the guide frame is fixed on the positioning pile. After the third positioning is carried out by the guide frame fine adjustment device, the steel pipe of the composite pile is inserted into the design elevation, and the hydraulic system is adopted in the construction. The RTK positioning measurement and three times positioning technology of the guide device ensure the plane position and the inclination degree of the composite pile steel pipe, and the precision of the composite pile steel pipe beating facility meets the requirements of the engineering technical specification.
【作者单位】：中铁大桥局集团第五工程有限公司;
【分类号】：U445.4

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