Super long concrete wall construction

Abstract

The invention discloses an ultra-long concrete wall body structure and a method for controlling structural cracks by constructing a wall body. The ultra-long concrete wall body structure comprises a wall body, wherein cutting steel plates (3) are arranged on a concrete inner core layer (2) arranged between two layers of steel bar nets (1) of the wall body in the length direction of the wall body at certain intervals; the continuous concrete inner core layer (2) arranged between two layers of steel bar nets (1) is cut into concrete inner core units (4) by the cutting steel plates (3); a plurality of horizontal connecting steel bars (5) in different heights are welded on each cutting steel plate (3); two ends of each connecting steel bar (5) are provided with bending sections (5.1); and the two bending sections (5.1) of each connecting steel bar (5) are respectively welded with horizontal steel bars (1.1) of the two layers of steel bar nets (1). The method comprises the key step that the cutting steel plates (3) are arranged in the length direction of the wall body at certain intervals. The structure and the method disclosed by the invention have the advantages that the effective control can be realized on the structural cracks, and harmful cracks can be eliminated.

Description

technical field [0001] The present invention relates to the construction technology of controlling structural cracks of concrete walls in the field of civil engineering, in particular to an ultra-long concrete wall structure and the construction of the ultra-long concrete wall structure to control the structure of the ultra-long concrete wall structure crack method. Background technique [0002] In engineering construction, the application of super-long concrete wall structure has been very common. The super-long generally refers to the length of more than 35m, such as underground garages, large-scale underground building peripheral walls, side walls of various liquid storage tanks and super-long side walls of rivers, etc. The ultra-long concrete wall structure will produce a large number of structural cracks due to shrinkage and deformation during the condensation and curing process and under the action of temperature difference, resulting in leakage and affecting its use ...

AI Technical Summary

Problems solved by technology

The ultra-long concrete wall structure will produce a large number of structural cracks due to shrinkage and deformation during the condensation and curing process and under the action of temperature difference, resulting in leakage and affecting its use function

Over the years, in order to effectively control the structural cracks of super-long walls, the engineering community has carried out a lot of arduous explorations, but it has not been able to solve this technical problem

[0003] In the prior art, the method of setting post-casting belts is mostly used, that is, a post-casting belt is reserved at a certain distance, but this method will first lead to an extension of the construction period, because the post-casting belt must be placed after the concrete of the first-cast wall section reaches a certain strength. It usually takes about 60 days to make up, and the relevant areas cannot be followed up before making up; moreover, temporary protection measures need to be set up before the post-casting belt is made up, and there are many construction steps, and the actual operation is cumbersome; moreover, the most important thing is However, relying on the post-cast belt still cannot effectively control the structural cracks, because there is a contradiction between the existence of the post-cast belt and the control of structural cracks: if there are too few post-cast belts, the continuous concrete section of the wall is still long, and the accumulated tension The stress is still high, and the cracks caused by the deformation are many, which cannot achieve the effect of controlling the cracks. However, if there are many post-casting belts, there will be two construction joints in each post-casting belt, and the construction joints are prone to leakage. In high-risk areas, there are more construction joints and more hidden dangers of leakage; in summary, relying on post-casting belts not only prolongs the construction period and increases construction steps, but also has poor control effect on structural cracks

The existing technology also adopts the method of adding expansion agent to the concrete and adding steel bars in the wall, such as adding unbonded prestressed tendons, but the control effect on structural cracks is still not ideal. In actual use, walls are still commonly used. cracking, harmful cracks

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