Precise positioning method for large-scale steel open caisson

A precise positioning, steel caisson technology, applied in the direction of caisson, erection/assembly of bridges, bridges, etc., can solve the problems of adjustment difficulty, construction deviation, overspeed, etc., achieving obvious economic benefits, reducing construction difficulty, and high positioning accuracy Effect

Active Publication Date: 2015-04-01
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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Problems solved by technology

[0003] At present, the anchor pier positioning scheme adopted in the construction of steel caissons requires a large amount of equipment and materials, and the cost is high. During the sinking process of steel caissons, it is necessary to rewind and adjust the main stay cables and side cables. The construction process is complicated, and the anchor The number of chain positioning systems is large, the adjustment is difficult during the caisson sinking process, and the a

Method used

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  • Precise positioning method for large-scale steel open caisson
  • Precise positioning method for large-scale steel open caisson
  • Precise positioning method for large-scale steel open caisson

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[0040] The present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0041] The invention provides a precise positioning method for a large steel caisson, which includes the following steps:

[0042] S1. Make the steel anchor piles 2 upstream and downstream of the steel caisson 1 at the factory. The steel anchor piles 2 are made of steel piles with a diameter of 3.5m. The steel anchor piles 2 are marked with a scale and the connection direction of each cable , And sleeve one end of the upper cable 3 and the lower cable 4 made of steel wire rope with a diameter of 114mm into the designated position of the steel anchor pile 2; figure 1 As shown, the manufactured steel anchor piles 2 are transported to the upstream and downstream pile positions, and inserted and driven after the positioning is completed by the positioning ship 10 and the GPS positioning system.

[0043] S2. Make a concrete gravity anchor 5 on the shore, connect the c...

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Abstract

The invention provides a precise positioning method for a large-scale steel open caisson, and relates to the technical field of bridge engineering construction. The positioning method comprises the following steps that firstly, a manufactured steel anchor pile is conveyed to upstream and downstream pile position parts for positioning inserting beating construction, then, concrete gravity anchors are cast and positioned at the two sides of the steel open caisson, after the steel open caisson is conveyed to a pile position in a floating way, the connection of lower drag cables, upper drag cables and side anchor ropes is sequentially completed, then, the inclination degree and the plane twisted angle of the steel open caisson are subjected to primary positioning by using hydraulic continuous tensioning equipment, and during water injection downward sinking of the steel open caisson, the steel open caisson is subjected to fast dynamic fine adjustment in the downwards sinking process and the precise positioning during the water injection implantation through the hydraulic continuous tensioning equipment, so that a steel open caisson structure realizes the safe implantation in a controllable state. The precise positioning method has the advantages that the positioning accuracy is high, the construction cost and the risk are low, and in addition, the influence on the river bed scouring and deposition and the peripheral environment is reduced.

Description

technical field [0001] The invention relates to the technical field of bridge engineering construction, in particular to a method for precise positioning of large steel caissons. Background technique [0002] As the deep water foundation of bridges, steel caissons have a large mass, long construction period, and complex working conditions. During the construction process, they need to bear various loads such as flowing water pressure and wind force acting on the steel caissons. It will cause changes in the water flow near the piers, resulting in changes in the erosion and deposition of the river bed. Therefore, the location of the steel caisson is very important. [0003] At present, the anchor pier positioning scheme adopted in the construction of steel caissons requires a large amount of equipment and materials, and the cost is high. During the sinking process of steel caissons, it is necessary to rewind and adjust the main stay cables and side cables. The construction pro...

Claims

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Application Information

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IPC IPC(8): E01D21/00E02D27/52
CPCE01D21/00E02D23/08
Inventor 李军堂陈开桥邱琼海陈涛毛伟琦涂满明许佳平李方峰唐勇张文斌黄辉
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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