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Auxiliary positioning method for U-shaped platform of large cofferdam

A positioning method and cofferdam technology, which is applied in the erection/assembly of bridges, bridges, buildings, etc., can solve the problems of increasing the cost of anchor piers, slow construction speed, and occupying the river channel, so as to achieve small influence on the channel, ensure positioning accuracy, and simple process Effect

Active Publication Date: 2016-09-28
CCCC SECOND HARBOR ENG
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Problems solved by technology

2. Anchor pier positioning: The advantage of the anchor pier positioning scheme is that the construction force is clear, the number of anchor cables is small, and the construction process is not affected by the water level; the disadvantage is that the cost of anchor pier construction is increased, and the river channel is also occupied, and the construction speed slower
The Chinese invention patent with the publication number CN 101666097 discloses a large-scale steel suspension box or caisson positioning and sinking method, which is the anchor pier positioning method, which requires the construction of upstream anchor piers and downstream anchor piers, which is costly and takes a long time

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  • Auxiliary positioning method for U-shaped platform of large cofferdam
  • Auxiliary positioning method for U-shaped platform of large cofferdam
  • Auxiliary positioning method for U-shaped platform of large cofferdam

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] The U-shaped platform auxiliary positioning method of the large double-wall steel cofferdam of the present invention is:

[0036] a. Construction U-shaped platform

[0037] Such as Figure 1-2 As shown, through the vertical steel pipe pile 2.1 and the parallel joint 2.2 formed by the connection between the vertical distribution beam and the horizontal distribution beam between the steel pipe piles 2.1, the Bailey beam 2.3 above the steel pipe pile 2.1, and the steel pipe above the Bailey beam 2.3 The panel 2.4 is built into the total trestle 2, and the total trestle 2 is provided with two layers of parallel connections 2.2, and between the lower layer of parallel connections and the upper layer of parallel connections, as well as between the upper layer of parallel connections and Bailey beam 2.3, are provided with diagonal br...

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Abstract

The invention discloses an auxiliary positioning method for a U-shaped platform of a large cofferdam. The auxiliary positioning method is characterized in that a main trestle is built from the shore, auxiliary trestles extending from the main trestle are built from the two sides of a main pier, and the U-shaped platform is formed by the two auxiliary trestles and the portion, between the two auxiliary trestles, of the main trestle; the cofferdam is transported to the tail portions of the auxiliary trestles, close to the middle of a river, of the U-shaped platform and connected with the auxiliary trestles, and mooring and positioning are conducted; the front end of the cofferdam is pulled into the U-shaped platform through a plurality of pulling cables which are connected to the U-shaped platform and provided with traction equipment; and the positions of the front end and the two sides of the cofferdam in the U-shaped platform are adjusted through the multiple pulling cables which are connected to the U-shaped platform and provided with the traction equipment, and finally the pulling cables are pre-tightened for positioning. According to the auxiliary positioning method, the U-shaped platform is formed by the main trestle and the auxiliary trestles, accurate positioning of the cofferdam is achieved rapidly, and the influences to the watercourse are small.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to an auxiliary positioning method for a U-shaped platform of a large double-wall steel cofferdam. Background technique [0002] The double-wall steel cofferdam is the water-stop structure of the platform cap construction and the support structure of the drilling platform. There are two common positioning methods: 1. Positioning ship positioning: The advantages of the positioning ship positioning scheme are that the construction experience is mature, the construction difficulty is small, and the construction speed Fast; the disadvantage is that there are a large number of ships and anchor cables, which have a great impact on the channel, and the positioning system is a flexible system. The ship is disturbed by the fluctuation of the water level, and the positioning accuracy is low. It is suitable for the positioning construction of double-wall steel cofferdams with small...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E02D19/04
CPCE01D21/00E02D19/04
Inventor 李志成陈金元李贤仰段小健陈诚白文虎
Owner CCCC SECOND HARBOR ENG
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