CN-224228006-U - Compensating structure for shrinkage cracks of post-pouring-belt-free ultra-long structure construction concrete

CN224228006UCN 224228006 UCN224228006 UCN 224228006UCN-224228006-U

Abstract

The utility model relates to a compensation structure for a shrinkage crack of concrete for construction without a post-cast strip overlength structure, which is characterized in that the overlength structure is divided into a plurality of construction sections, a compensation structure which is poured simultaneously with the post-construction sections is adopted between adjacent construction sections to replace the post-cast strip, the compensation structure comprises a compensation shrinkage strip, the construction joint is arranged between the compensation shrinkage strip and the pre-construction section, the compensation shrinkage strip adopts a steel bracket and a net blocking stubble as supporting bodies and forms an integral structure with the compensation shrinkage concrete, the net blocking stubble is arranged between the construction joint and the compensation shrinkage strip immediately after the construction section, the expansion coefficient of the compensation shrinkage concrete is larger than that of concrete adopted by the pre-construction section and the post-construction section, and the strength of the compensation shrinkage concrete is larger than that of concrete adopted by the pre-construction section and the post-construction section. The utility model omits a temperature post-pouring belt and can carry out construction operations of construction and equipment installation and the like which are mutually inserted with the main structure construction in advance. And various quality risks brought by the setting of the temperature post-cast strip are eliminated.

Inventors

LI XINRUI
JIN KANG
QIAO HANQING
SUN JINGBO
YU MIAO
LI GUANGLEI
LU YUNXIAO
SHU JING

Assignees

中建三局集团北京有限公司
中建三局集团有限公司

Dates

Publication Date: 20260512
Application Date: 20241220

Claims (8)

1. The utility model provides a no compensation structure of post-cast strip overlength structure construction concrete shrink crack which characterized in that, overlength structure divide a plurality of construction sections, adopts the compensation structure who pours simultaneously with post-construction section (6) to replace the post-cast strip between the adjacent construction section, includes: The compensation shrinkage belt (4) is positioned at the rear part of the pre-construction section (1), a construction joint (3) is arranged between the compensation shrinkage belt (4) and the pre-construction section (1), the compensation shrinkage belt (4) adopts a steel bracket and a net blocking stubble (5) as supporting bodies and forms an integrated structure with compensation shrinkage concrete, and the net blocking stubble (5) is adjacent to the post-construction section (6); A water stop (2) arranged between the construction joint (3) and the compensating shrink band (4); The expansion coefficient of the compensation shrinkage concrete is larger than that of the concrete adopted by the first construction section (1) and the later construction section (6), and the strength of the compensation shrinkage concrete is larger than that of the concrete adopted by the first construction section (1) and the later construction section (6).
2. The compensating structure for shrinkage cracks of post-cast strip-free ultra-long structure construction concrete according to claim 1, wherein each of the compensating shrinkage strips (4) has a width of 0.8-1.2m.
3. The compensation structure for shrinkage cracks of post-cast strip-free ultra-long structure construction concrete of claim 1, wherein the steel support is formed by adopting vertical steel bars and transverse steel bars at equal intervals.
4. The compensation structure for shrinkage cracks of post-pouring strip-free ultra-long structure construction concrete of claim 1, wherein the net blocking stubble (5) is a fast and easy closing net blocking stubble.
5. The compensation structure for shrinkage cracks of post-pouring strip-free ultra-long structure construction concrete is characterized in that a joint surface at the construction joint (3) is of a rough surface structure, and a closing-in net bound on the pre-construction section (1) is arranged between the rough surface structure and the compensation shrinkage strip (4).
6. The compensating structure for shrinkage cracks of post-pouring strip-free ultra-long structure construction concrete according to claim 1, wherein the water stop strip (2) is horizontally arranged in the middle of the compensating shrinkage strip (4) and the pre-construction section (1), and the two sides of the water stop strip are downwards bent.
7. The compensating structure for shrinkage cracks of post-cast strip-free ultra-long structure construction concrete according to claim 1, wherein slag portland cement is adopted as the compensating shrinkage concrete.
8. The compensating structure for shrinkage cracks of construction concrete of post-cast strip-free ultra-long structure according to any one of claims 1 to 7, wherein the compensating shrinkage strip (4) further comprises additional constructional steel bars (8), wherein the additional constructional steel bars (8) are single-layer bidirectional steel bar meshes, are arranged at the bottom of the compensating shrinkage strip (4), and are respectively inserted into the pre-construction section (1) and the post-construction section (6) at two ends.

Description

Compensating structure for shrinkage cracks of post-pouring-belt-free ultra-long structure construction concrete Technical Field The utility model relates to the technical field of concrete crack compensation, in particular to a compensation structure for shrinkage cracks of post-pouring strip-free ultra-long structure construction concrete. Background With the rapid development of mass public buildings and the increasing office use demands of people in recent years, the underground building scale of the comprehensive public buildings is continuously enlarged, and the functions are more abundant. Under the condition of dense and tense urban land of the existing underground building space, the situation of underground communication of a plurality of main buildings is paid attention to, and the ultra-long space communication becomes a new development trend in the underground space building. However, there is a problem of cracks in the ultra-long concrete structure, and thus a technique of how to control the cracks in the ultra-long concrete structure is important. At present, a post-cast strip is generally arranged to release a large amount of temperature and shrinkage stress so as to achieve the aim of controlling concrete cracks. Although the shrinkage deformation and the settlement deformation of the concrete can be fully released through the form, a series of quality and construction difficulties such as water burst of a basement in a rainy period, difficulty in manual cleaning and the like are brought by the reserved post-cast strip. These problems not only increase the difficulty of construction, but may also affect the overall quality and progress of the project. Therefore, how to effectively solve these adverse effects, break through the construction difficulty brought by the post-cast strip design, and is a problem that needs to be solved by those skilled in the art. Disclosure of utility model Therefore, the utility model aims to provide a compensation structure for shrinkage cracks of concrete for construction of a post-cast strip-free ultra-long structure, and solves the problems existing in the existing post-cast strip mode. The technical scheme of the utility model is a compensation structure for constructing concrete shrinkage cracks without a post-cast strip ultra-long structure, the ultra-long structure is divided into a plurality of construction sections, the compensation structure which is poured with the post-construction sections simultaneously is adopted between adjacent construction sections to replace the post-cast strip, and the compensation structure comprises the following components: The compensation shrinkage belt is positioned at the rear part of the first construction section, a construction joint is arranged between the compensation shrinkage belt and the first construction section, and the compensation shrinkage belt adopts a steel bracket and a net stubble blocking as supporting bodies and forms an integrated structure with compensation shrinkage concrete; A water stop arranged between the construction joint and the compensation shrinkage belt; The expansion coefficient of the compensation shrinkage concrete is larger than that of the concrete adopted by the first construction section and the second construction section, and the strength of the compensation shrinkage concrete is larger than that of the concrete adopted by the first construction section and the second construction section. According to the technical scheme of the utility model, the width of each compensation shrinkage band is 0.8-1.2m. According to the technical scheme of the utility model, the steel support is formed by adopting the distances between the vertical steel bars and the transverse steel bars, and the distance between the vertical steel bars is equal to the distance between the transverse steel bars. According to the technical scheme of the utility model, the net stubble blocking adopts a fast and easy closing net stubble blocking. According to the technical scheme of the utility model, the joint surface at the construction joint is of a rough surface structure, and a closing net bound on the prior construction section is arranged between the rough surface structure and the compensation shrinkage belt. According to the technical scheme of the utility model, the water stop belt is horizontally arranged at the middle position of the compensation shrinkage belt and the prior construction section, and the two sides of the water stop belt are downwards bent. According to the technical scheme of the utility model, slag silicate cement is adopted for the shrinkage-compensating concrete. According to the technical scheme of the utility model, the compensation shrinkage belt further comprises additional constructional steel bars, wherein the additional constructional steel bars adopt a single-layer bidirectional steel bar net sheet, are arranged at the bottom of the compensation shrinkage belt, and are resp