Coastal environment high pier hydraulic self-creeping formwork construction method

Abstract

The invention discloses a coastal environment high pier hydraulic self-creeping formwork construction method. The method comprises the steps of tower column starting section construction, tower columnfirst section construction, hydraulic creeping formwork installation, tower column second section construction, tower column remaining section construction and creeping formwork removal, the hydraulic creeping formwork comprises an embedded part mechanism embedded in a high pier wall, and a frame body mechanism comprises a lower hanging bracket and a bearing frame; the formwork installation comprises a formwork consisting of a panel, a woodworking I-shaped beam and a steel enclosing purlin, a movable template bracket and a backward moving device; a hydraulic power mechanism comprises an upperreversing box, a lower reversing box, a hydraulic pump and a hydraulic oil cylinder which are connected with the guide rail in a sliding manner; the guide rail is composed of two steel channels and guide rail stair stops, and the upper reversing pawl of the upper reversing box and the lower reversing pawl of the lower reversing box are arranged between the guide rail stair stops. The constructionmethod is convenient to operate, high in safety and convenient to construct, working hours and construction sites are saved, and formwork bumping damage is reduced; and the formwork is recycled, theworkload of hoisting machinery is greatly reduced, and the construction process is stable, synchronous and safe.

Description

Technical field: [0001] The invention relates to a construction method, in particular to a hydraulic self-climbing formwork construction method for a high pier in a coastal environment. Background technique: [0002] In recent years, my country's bridge industry has developed rapidly. The span of newly built bridges has become larger and larger, the structure has become more and more complex, and the height of piers and columns has also increased. Safety requirements are getting higher and higher. For the construction of high piers, there are three construction techniques: sliding formwork, turning formwork and climbing formwork. [0003] It is difficult to control the sliding time in slip form construction, and it can only be judged by experience. If the sliding is too early, it will easily lead to unevenness of the concrete surface, and if the sliding is too late, it will easily cause cracks in the horizontal direction of the concrete. In addition, the sliding form has hi...

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Problems solved by technology

[0003] It is difficult to control the sliding time in slip form construction, and can only be judged by experience. If the sliding is too early, it will easily lead to unevenness of the concrete surface, and if the sliding is too late, it will easily cause cracks in the horizontal direction of the concrete.

In addition, the sliding form has high requirements on the stiffness of the lifting system. If the support rods are bent, it is difficult to ensure the verticality of the pier body, and this method is not suitable for high piers with variable cross-sections and intermediate beams construction

[0004] Although the overturning construction has the advantages of less material input and simple process, its own shortcomings are also obvious.

(1) Due to the limitation of its own support conditions, the safety factor is low during the construction of equal-section piers; (2) The joint between the upper and lower sections of the formwork is not well controlled, and it is easy to cause wrong platform, the plane position of the pier body is not easy to control, and the wind resistance is poor (3) The operating platform around the formwork is not easy to set up, and it is not easy to operate when manually assembling and disassembling the formwork, which is prone to safety accidents

(4) After the formwork is removed, it is inconvenient to apply the release agent, and the pier body building materials are not easy to stack

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