Method for controlling crack of super-long wall body

A control method and wall technology, applied in the construction of super-long walls and construction fields, can solve the problem that prestressing technology is difficult to play an effective role, and achieve easy production and installation, reduction of wall shrinkage stress, and construction procedures. concise effect

Inactive Publication Date: 2009-12-23
NINGBO CONSTR +2
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Problems solved by technology

It can be seen that in view of the different characteristics of the wall deformation restricted by the wall foundation, it

Method used

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  • Method for controlling crack of super-long wall body
  • Method for controlling crack of super-long wall body
  • Method for controlling crack of super-long wall body

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[0025] The present invention will be further described in detail below with reference to the embodiments of the drawings.

[0026] Such as figure 1 As shown, the method of the present invention is applied to a phase 2 project of a certain business district. The project is a large-area underground two-story garage structure with a construction area of ​​about 70,000 m2 2 The basement is 256.8m long and 132.8~165m wide. It is a two-way pre-stressed frame structure. The outer wall and the side wall 1 of the artificial river crossing the upper garage with a width of 42m are more than 260 meters long. It is an extra-long wall that is resistant to cracking. The requirements are higher.

[0027] Such as figure 1 As shown, the artificial river 2 has a water depth of 3m, the river side wall 1 is 3.1m high and 300mm thick, using C30 concrete, and 1φ is added to each of the longitudinal sides of the wall. s 15.24@300 unbonded prestressed tendons. In order to reduce the shrinkage stress in ...

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Abstract

The invention relates to a method for controlling a crack of a super-long wall body. The method is characterized by comprising the following steps: the super-long wall body is vertically divided by a thin steel plate along the longer inner core concrete of the wall; then a water stop steel plate is arranged on the axial position vertical to a separation steel plate; the separation steel plate divides the water stop steel plate into two parts and leads the two parts to be vertical to each other; and the separation steel plate and the water stop steel plate are positioned between meshes reinforcement at two sides of the wall body, and are bound and fixed with the meshes reinforcement. Compared with the prior art, the method for controlling the crack of the super-long wall body has simple and clear construction procedure, is advantageous to reduction of shrinkage stress of the wall body, can effectively play a role in controlling the crack matched with prestressed reinforcement, can be applied to any wall body structure requiring crack control, in particular to construction of the wall body of an underground garage, the side wall plates of overground and underground artificial channels, a super-long large water pool, side wall of a sewage treating pond and a retaining wall.

Description

technical field [0001] The invention relates to the construction field of super-long walls in the construction field, in particular to a method for controlling cracks in super-long walls caused by prestress. Background technique [0002] The super-long reinforced concrete wall and super-long reinforced concrete frame structure have similar mechanism of cracks, but have different characteristics. The poured concrete wall will have a large shrinkage deformation during the curing process. However, the shrinkage and deformation of the concrete in the wall will be restricted by the rigid wall foundation at the same time, and this restriction will increase with the development of the shrinkage and deformation of the concrete. The restriction is the distributed shear force between the wall and the wall foundation. [0003] When the wall element is deformed, there is also a symmetry axis that does not produce deformation. The bottom of the wall has a small displacement due to the e...

Claims

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Application Information

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IPC IPC(8): E04B1/66E04B2/00E04G21/12
Inventor 焦彬如李水明刘用海肖秀丽
Owner NINGBO CONSTR
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