Special-shaped bridge pier column mass concrete pouring process

Abstract

The invention discloses a special-shaped bridge pier column mass concrete pouring process. The special-shaped bridge pier column mass concrete pouring process is characterized in that the pouring process comprises the construction steps that foundation pouring is firstly performed; then pier body steel bar erection, formwork installation, beret sheet column installation, pouring preliminary treatment and pier body pouring are sequentially performed; and after pier body pouring is completed, initial curing and final formwork removal curing are performed. By adopting the construction steps, theconstruction period is shortened, the construction efficiency is improved, the construction quality of a bridge pier column is improved, and the safety of a bridge is ensured.

Description

technical field [0001] The invention belongs to the technical field of road and bridge construction, and in particular relates to a large-volume concrete pouring process for special-shaped bridge pier columns with slopes at both ends. Background technique [0002] At present, in the construction of special-shaped piers of municipal or traffic engineering bridges, the quality of finished concrete pouring is closely related to the quality of formwork reinforcement, concrete pouring process, concrete curing and other processes. [0003] Formwork reinforcement generally adopts the pull screw technology. This kind of reinforcement is easy to operate and the process is simple, but the disadvantages are particularly obvious for special-shaped structures. There are generally two ways to use the pull screw. One is to directly embed the screw when the formwork is installed. Pass through the middle of the pier column, and the second is to pass through the middle of the pre-embedded cas...

AI Technical Summary

Problems solved by technology

[0003] Formwork reinforcement generally adopts the pull screw technology. This kind of reinforcement is easy to operate and the process is simple, but the disadvantages are particularly obvious for special-shaped structures. There are generally two ways to use the pull screw. One is to directly embed the screw when the formwork is installed. Pass through the middle of the pier column, and the second is to pass through the middle of the pre-embedded casing casing and the pull screw. Both of these two need to open holes in the formwork. During the concrete pouring process, the opening position is very prone to grout leakage. At the same time, it is necessary to cut off the screw or pull out the pull rod after the formwork is removed. After a long time, rust spots will appear on the cut part, and the position of the casing needs to be repaired after it is pulled out, which will have a certain impact on the quality and appearance of the pier column; at the same time, the special-shaped structure will exist in some areas. It is impossible to install the pull screw and other phenomena, and the use of ordinary steel pipe support is also prone to quality problems such as mold expansion

[0004] The special-shaped structure is generally large in size, the space structure is complex in force, the steel bars are relatively dense, and the structure is concave-convex. It is poured with ordinary concrete. It is easy to produce quality problems such as a large number of holes, honeycomb pockmarks, and concrete strength that cannot meet the design requirements

[0005] Conventional concrete curing generally adopts cooling pipes or covering natural curing, but the special-shaped structural steel bars are relatively dense, and usually there is no space for laying cooling pipes, the cost of covering natural curing is high, and the space special-shaped structure is complex, which may cause insufficient coverage and poor curing effect , the structure is prone to a large number of cracks

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