Continuous pouring expansion reinforcing band structure of super-long-span concrete structure
By alternately setting up exterior and interior expansion concrete layers in the expansion reinforcement belt, and setting up a quick and easy-to-close net between the two layers, the problem of concrete mixing during construction is solved, and the construction quality and construction efficiency are improved.
Patent Information
- Application Number
- CN202421657860.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-12
AI Technical Summary
When the existing expansion reinforcement belt is constructed, the concrete on the outside and inside of the belt is prone to mix flow, affecting the construction quality.
The expansive concrete layer outside the belt and the expansive concrete layer inside the belt are alternately arranged, and a quick and easy-to-close net is set between the two layers to reduce concrete pressure and mixing flow, and at the same time form a good bonding surface.
It effectively reduces concrete mixing, improves construction quality, cancels post-pouring strips, facilitates material transportation, and speeds up construction progress.
Smart Images
Figure CN222936205U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of construction engineering, and in particular, to a continuous casting expansion strengthening belt structure for an extra-long-span concrete structure. Background Art
[0002] For an extra-long-width concrete structure, post-cast strips are set to avoid the occurrence of shrinkage cracking and damage of the concrete structure. For the construction of a factory building structure, the span is long and the number of post-cast strips is large, which is not conducive to the transportation and turnover of materials after the formwork is removed on site, and affects the construction progress.
[0003] An expansion strengthening belt is a technical measure that reduces or eliminates post-cast strips and expansion joints by casting compensated shrinkage concrete at the pre-set post-cast strip part of the structure and extends the continuous casting length of the component. By eliminating the post-cast strip, it is convenient for the transportation of materials after the formwork is removed on site and speeds up the construction progress. During the construction of the existing expansion strengthening belt, small-expansion concrete is used on the outside of the belt, large-expansion concrete is used when reaching the strengthening belt, and small-expansion concrete is used again when reaching the other side of the strengthening belt. By circulating in this way, an extra-long concrete structure of 100m - 150m can be continuously cast.
[0004] The above-mentioned existing technical solutions have the following defects: the concrete on the outside and inside of the belt is prone to mixed flow during continuous casting, which affects the construction quality of the expansion strengthening belt, so there is still room for improvement. Utility Model Content
[0005] In order to improve the construction quality of the expansion strengthening belt, this application provides a continuous casting expansion strengthening belt structure for an extra-long-span concrete structure.
[0006] The continuous casting expansion strengthening belt structure for an extra-long-span concrete structure provided by this application adopts the following technical solutions:
[0007] A continuous casting expansion strengthening belt structure for an extra-long-span concrete structure includes an outer-belt expansion concrete layer, an inner-belt expansion concrete layer, and a quick-setting closing net. The outer-belt expansion concrete layer and the inner-belt expansion concrete layer are connected and arranged alternately, and the quick-setting closing net is arranged between the outer-belt expansion concrete layer and the inner-belt expansion concrete layer.
[0008] By adopting the above technical solutions, when constructing the expansion strengthening belt, first complete the binding of the bottom slab steel bars, preset the positions of the outer-belt expansion concrete layer and the inner-belt expansion concrete layer, and when pouring the concrete, first pour the outer-belt expansion concrete layer and then pour the inner-belt expansion concrete layer, and continuously pour. The post-cast strip is cancelled, which is convenient for the transportation of materials after the formwork is removed on site and speeds up the construction progress. The setting of the quick-setting closing net can not only form voids, reduce the concrete pressure, but also reduce the mixed flow of the concrete on both sides of the outside and inside of the belt, and at the same time can form a well-bonded joint surface of the concrete, improving the construction quality of the expansion strengthening belt.
[0009] Preferably, additional steel bars are further included. The additional steel bars are lapped on the bottom steel bars in the in-ribbon expansive concrete layer and extend towards the out-ribbon expansive concrete layer.
[0010] By adopting the above technical solution, the additional steel bars play a reinforcing role, making the binding of the bottom steel bars more stable and enhancing the strength of the expansion strengthening belt.
[0011] Preferably, a rubber water stop strip is fixed on one side of the quick-installed closing net close to the out-ribbon expansion strengthening belt.
[0012] By adopting the above technical solution, by setting the rubber water stop strip, it can absorb water and expand when encountering water during construction or when cracks appear in the expansion strengthening belt in the later stage, achieving the effect of water stopping, blocking water leakage, and playing a good waterproof effect.
[0013] Preferably, an angle steel formwork is fixed on one side of the rubber water stop strip close to the out-ribbon expansion strengthening belt.
[0014] By adopting the above technical solution, the angle steel formwork is used for closing between the out-ribbon expansive concrete layer and the in-ribbon expansive concrete layer, further improving the strength of the expansion strengthening belt. At the same time, it reduces the mixing of concrete on both sides of the out-ribbon and in-ribbon, and improves the construction quality of the expansion strengthening belt.
[0015] Preferably, the dosage of the high-performance expansive agent in the in-ribbon expansive concrete layer is 12%, and the dosage of the high-performance expansive agent in the out-ribbon expansive concrete layer is 8%.
[0016] By adopting the above technical solution, the dosages of the high-performance expansive agent in the in-ribbon expansive concrete layer and the out-ribbon expansive concrete layer are reasonably designed, improving the expansion rate of the concrete at the most easily cracked part, eliminating the tensile stress in the concrete at this part, and reducing cracking.
[0017] Preferably, two layers of additional steel bars are provided. The two layers of additional steel bars are respectively lapped on the top and bottom of the bottom steel bars in the in-ribbon expansive concrete layer.
[0018] By adopting the above technical solution, by setting two layers of additional steel bars, the strength of the bottom steel bars is further enhanced, and the strength of the expansion strengthening belt after construction is also enhanced.
[0019] Preferably, the strength of the in-ribbon expansive concrete layer is greater than that of the out-ribbon expansive concrete layer.
[0020] By adopting the above technical solution, the strength of the in-ribbon expansive concrete layer is greater than that of the out-ribbon expansive concrete layer, which better ensures the compressive strength of the expansion strengthening belt.
[0021] Preferably, the rubber water stop strip is arranged longitudinally along the connection line between the in-rib expanded concrete layer and the out-rib expanded concrete layer.
[0022] By adopting the above technical solution, the rubber water stop strip is arranged longitudinally along the connection line between the in-rib expanded concrete layer and the out-rib expanded concrete layer, which can enable the rubber water stop strip to achieve better waterproof effect.
[0023] In summary, the present application includes at least one of the following beneficial technical effects: when constructing the expansion strengthening belt, first bind the bottom slab steel bars, preset the positions of the out-rib expanded concrete layer and the in-rib expanded concrete layer, pour the out-rib expanded concrete layer first and then the in-rib expanded concrete layer during concrete pouring, and continuously pour, cancel the post-cast strip, which is convenient for material transportation after formwork removal on site, speeds up the construction progress. The setting of the easy-to-install and remove formwork net can not only form voids to reduce the concrete pressure, but also reduce the mixing of concrete on both sides of the out-rib and in-rib, and at the same time can form a well-bonded joint surface of the concrete, improving the construction quality of the expansion strengthening belt. Description of the Drawings
[0024] Figure 1 is the overall structural schematic diagram of the expansion strengthening belt structure of the embodiment of the present application.
[0025] Figure 2 is the structural schematic diagram of the expansion strengthening belt structure before concrete pouring in the embodiment of the present application.
[0026] Description of the reference numerals: 1. Out-rib expanded concrete layer; 2. In-rib expanded concrete layer; 3. Easy-to-install and remove formwork net; 4. Additional steel bars; 5. Rubber water stop strip; 6. Angle steel formwork. Detailed Description of the Embodiment
[0027] The following will further describe the present application in detail Figure 1-2 with reference to the attached
[0028] The embodiment of the present application discloses an expansion strengthening belt structure for continuous pouring of a super-long-span concrete structure. Refer to Figure 1 and Figure 2, A continuous casting expansion strengthening belt structure for an extra-long-span concrete structure includes an outer-belt expansion concrete layer 1, an inner-belt expansion concrete layer 2, a quick-setting closing net 3, additional steel bars 4, a rubber water stop strip 5, and an angle steel formwork 6. During construction, after the bottom steel bars are tied and formed, they are horizontally laid on the ground where the expansion strengthening belt needs to be cast, and the positions of the outer-belt expansion concrete layer 1 and the inner-belt expansion concrete layer 2 are preset. The additional steel bars 4 are lapped on the bottom steel bars at the position of the inner-belt expansion concrete layer 2 and extend towards the outer-belt expansion concrete layer 1. There are two layers of additional steel bars 4, and the two layers of additional steel bars 4 are respectively lapped on the top and bottom of the bottom steel bars within the inner-belt expansion concrete layer 2. And the quick-setting closing net 3 is fixed between the outer-belt expansion concrete layer 1 and the inner-belt expansion concrete layer 2. The rubber water stop strip 5 is fixed on the side of the quick-setting closing net 3 close to the outer-belt expansion strengthening belt, and the rubber water stop strip 5 is arranged longitudinally along the length direction of the connection line between the inner-belt expansion concrete layer 2 and the outer-belt expansion concrete layer 1. The angle steel formwork 6 is fixed on the side of the rubber water stop strip 5 close to the outer-belt expansion concrete layer 1.
[0029] When casting concrete, first cast the outer-belt expansion concrete layer 1 and then cast the inner-belt expansion concrete layer 2, and the casting is carried out continuously. After casting, the formed outer-belt expansion concrete layer 1 and inner-belt expansion concrete layer 2 are connected and arranged alternately. The quick-setting closing net 3, the rubber water stop strip 5, and the angle steel formwork 6 are arranged in a straight line between the outer-belt expansion concrete layer 1 and the inner-belt expansion concrete layer 2. By constructing the expansion strengthening belt, the post-cast strip is cancelled, which is convenient for material transportation after the formwork is removed on site and speeds up the construction progress. The setting of the quick-setting closing net 3 can not only form voids to reduce the concrete pressure, but also reduce the mixing of concrete on both sides of the outer-belt expansion concrete layer 1 and the inner-belt expansion concrete layer 2. At the same time, it can also form a well-bonded joint surface of the concrete, improving the construction quality of the expansion strengthening belt. By setting the angle steel formwork 6, the strength of the expansion strengthening belt is further improved, and at the same time, the mixing of concrete on both the outer and inner sides is also reduced, further improving the construction quality of the expansion strengthening belt. The rubber water stop strip 5 can absorb water and expand when encountering water during construction or when cracks appear in the expansion strengthening belt in the later stage to achieve the effect of water stop, blocking water leakage and achieving a good waterproof effect.
[0030] In addition, the dosage of the high-efficiency expansion agent in the inner-belt expansion concrete layer 2 is 12%, and the dosage of the high-efficiency expansion agent in the outer-belt expansion concrete layer 1 is 8%. The inner-belt expansion concrete layer 2 is in the most easily cracked part. The dosage of the high-efficiency expansion agent in the inner-belt expansion concrete layer 2 is greater than that in the outer-belt expansion concrete layer 1, which increases the expansion rate of the concrete in the inner-belt expansion concrete layer 2, eliminates the tensile stress in the concrete at this part, reduces cracking, and also increases the density of the concrete in the inner-belt expansion concrete layer 2, improving the strength and crack resistance and impermeability of the concrete in the inner-belt expansion concrete layer 2.
[0031] Furthermore, during the concrete pouring, the concrete grade in the inner expansion concrete layer 2 is higher than that in the outer expansion concrete layer 1, so that the strength of the inner expansion concrete layer 2 is greater than that of the outer expansion concrete layer 1, better ensuring the compressive strength of the expansion strengthening belt.
[0032] The implementation principle of the continuous pouring expansion strengthening belt structure of the super-long-span concrete structure in the embodiment of the present application is as follows: When constructing the expansion strengthening belt, first complete the binding of the bottom plate steel bars, preset the positions of the outer expansion concrete layer 1 and the inner expansion concrete layer 2, and then lap the two layers of additional steel bars 4 on the top and bottom of the bottom plate steel bars in the inner expansion concrete layer 2 respectively. Fix the quick-setting closing net 3 between the outer expansion concrete layer 1 and the inner expansion concrete layer 2. And a rubber water stop strip 5 is arranged longitudinally on the side of the quick-setting closing net 3 close to the outer expansion concrete layer 1, and an angle steel formwork 6 is fixed on the side of the rubber water stop strip 5 close to the outer expansion concrete layer 1. Finally, pour the concrete. First pour the outer expansion concrete layer 1 and then pour the inner expansion concrete layer 2, and the pouring is carried out continuously. The post-cast strip is cancelled, which is convenient for the transportation of materials after the formwork is removed on site, speeds up the construction progress, and improves the construction quality of the expansion strengthening belt.
[0033] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.
Claims
1. A super-long span concrete structure continuous casting expansion reinforcement belt structure, characterized in that: The invention comprises an external expansion concrete layer (1), an internal expansion concrete layer (2) and a quick-closing net (3), wherein the external expansion concrete layer (1) and the internal expansion concrete layer (2) are connected and arranged alternately, and the quick-closing net (3) is arranged between the external expansion concrete layer (1) and the internal expansion concrete layer (2).
2. The ultra-long span concrete structure continuous casting expansion reinforcement belt structure according to claim 1, characterized in that: It also comprises additional steel bars (4), wherein the additional steel bars (4) are overlapped on the bottom plate steel bars in the inner-zone expanding concrete layer (2) and extend towards the outer-zone expanding concrete layer (1).
3. The ultra-long span concrete structure continuous casting expansion reinforcement belt structure according to claim 1, characterized in that: A rubber water stop strip (5) is fixed to one side of the quick-closing net (3) close to the outer expansion reinforcement belt.
4. The ultra-long span concrete structure continuous casting expansion reinforcement belt structure according to claim 3 is characterized by: An angle steel template (6) is fixed to one side of the rubber water stop strip (5) close to the outer expansion reinforcement strip.
5. The ultra-long span concrete structure continuous casting expansion reinforcement belt structure according to claim 2, characterized in that: The additional steel bars (4) are provided in two layers, and the two layers of the additional steel bars (4) are respectively overlapped on the top and bottom of the bottom plate steel bars in the inner expansion concrete layer (2).
6. The ultra-long span concrete structure continuous casting expansion reinforcement belt structure according to claim 1, characterized in that: The strength of the inner-belt expanding concrete layer (2) is greater than the strength of the outer-belt expanding concrete layer (1).
7. The structure of continuous casting expansion reinforcement belt for ultra-long span concrete structure according to claim 3, characterized in that: The rubber water stop strip (5) is arranged along the length direction of the connection line between the inner expansion concrete layer (2) and the outer expansion concrete layer (1).