CN212001927U - Large-size bracket reinforcement structure - Google Patents
Large-size bracket reinforcement structure Download PDFInfo
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- CN212001927U CN212001927U CN202020120773.4U CN202020120773U CN212001927U CN 212001927 U CN212001927 U CN 212001927U CN 202020120773 U CN202020120773 U CN 202020120773U CN 212001927 U CN212001927 U CN 212001927U
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Abstract
The utility model discloses a large-size bracket reinforcement structure, which comprises a large-size bracket positioned at the upstream of a wall body, wherein the large-size bracket is formed by concrete and various reinforcement mixed pouring, the reinforcement comprises longitudinal horizontal tension steel bars and bending steel bars which are positioned at the outer edge of the large-size bracket profile and are arranged in parallel in a plurality of horizontal rows, longitudinal construction steel bars which are vertically arranged with the longitudinal horizontal tension steel bars and the bending steel bars and are parallel to each other, and horizontal stirrups which are positioned inside the large-size bracket and are arranged in multiple layers along the horizontal direction and the vertical direction; the horizontal stirrups adopt HRB 400-grade steel bars, the diameter is 20-25 mm, and the vertical and longitudinal intervals between every two adjacent horizontal stirrups are 1000-1500 mm. By optimizing the reinforcement parameters in the structure, the construction investment is saved, the construction is convenient, and the structure is safe and reliable, so that the aim of economic rationality is fulfilled.
Description
Technical Field
The utility model relates to a bulky bracket arrangement of reinforcement structure belongs to hydraulic and hydroelectric engineering technical field.
Background
In recent years, the water conservancy and hydropower industry in China is changed day by day, the engineering scale is continuously enlarged, and due to the structural arrangement requirement, some hydraulic buildings inevitably have cantilever structures with long span and large section size, large-size corbels are common types, and the structural reinforcement arrangement is also a serious difficulty in engineering technical research. Firstly, for large-volume corbels with small load action, structural reinforcement allocation calculation is carried out according to the design specification of hydraulic concrete structure (DL/T5057 + 2009, hereinafter referred to as the specification), the area of the longitudinal horizontal tensile reinforcement allocation obtained by calculation is very small, even if reinforcement allocation is carried out according to the minimum reinforcement allocation rate, the diameter of the reinforcement is very large, the distance between the reinforcement is very close, the processing and installation of the reinforcement are difficult, the pouring and blanking construction and vibration compaction of concrete are also influenced, and the safety of the structure can be influenced if the technical problems are not properly treated. Secondly, the current specification specifies that the bracket should be provided with horizontal stirrups, the steel bars should be HRB 335-grade steel bars, the diameter should not be less than 8mm, the vertical spacing should not be greater than 150mm, the horizontal spacing along the longitudinal direction of the bracket should not be greater than 300mm, and the total cross-sectional area of the horizontal stirrups in the effective height range of the upper 2/3 bracket should not be less than 1/2 of the cross-sectional area of the tensioned steel bars bearing vertical force or the reinforcement distribution rate should not be less than 0.15%. The execution according to the standard can cause the arrangement of the reinforcing steel bars in the bracket to be extremely dense, and the pouring construction quality of the concrete is influenced.
Practice proves that in the design of the reinforcing bars of the large-volume bracket structure, calculation and selection of longitudinal horizontal tension steel bars, arrangement of horizontal stirrups, construction quality and safety control of concrete are three main factors influencing design and construction, and the problem is worthy of deep research.
Disclosure of Invention
An object of the utility model is to provide a bulky bracket arrangement of reinforcement structure. By optimizing the reinforcement parameters in the structure, the construction investment is saved, the construction is convenient, and the structure is safe and reliable, so that the aim of economic rationality is fulfilled.
The technical scheme of the utility model: a large-size bracket reinforcement structure comprises a large-size bracket positioned at the upstream of a wall body, wherein the large-size bracket is formed by pouring concrete and various reinforcement in a mixed manner, the reinforcement comprises longitudinal horizontal tension steel bars and bending steel bars which are positioned at the outer edge of the outline of the large-size bracket and are arranged in parallel in a horizontal multi-row manner, longitudinal construction steel bars which are vertically arranged with the longitudinal horizontal tension steel bars and the bending steel bars and are mutually parallel, and horizontal stirrups which are positioned inside the large-size bracket and are arranged in multiple layers in the longitudinal and vertical directions along the horizontal direction; the horizontal stirrups adopt HRB 400-grade steel bars, the diameter is 20-25 mm, and the vertical and longitudinal intervals between every two adjacent horizontal stirrups are 1000-1500 mm.
In the large-volume bracket reinforcement structure, the longitudinal horizontal tension steel bars, the bending steel bars and the longitudinal structural steel bars are HRB 400-grade steel bars, the diameter of the HRB 400-grade steel bars is 20-36 mm, and 5-8 steel bars are arranged per meter.
The utility model has the advantages that: compared with the prior art, the utility model discloses a horizontal stirrup, vertical horizontal tension reinforcing bar, the angle reinforcing bar of the reasonable bulky bracket of cross sectional dimension and the parameter of vertical structure reinforcing bar optimize, can save the engineering investment, make things convenient for construction, safe and reliable to reach economic rationality's purpose, can extensively popularize and apply in hydraulic and hydroelectric engineering technical field. This scheme has been applied to in the big volume bracket structure arrangement of reinforcement structure of Tibet bent fruit many hydropower station diversion power generation system water inlet, adopts this kind of structure, has both satisfied the requirement of the reasonable big volume bracket structure bearing capacity design of cross-sectional dimension, and convenient construction again and saving investment have reached economic rationality's purpose, have gained good effect.
Drawings
FIG. 1 is a schematic structural section of the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic structural view of a horizontal stirrup;
FIG. 4 is a schematic view showing a structure of a longitudinal horizontal tension bar;
FIG. 5 is a schematic view of the structure of a bent steel bar;
fig. 6 is a schematic view of the structure of the longitudinally constructed reinforcing bar.
Reference numerals: 1-large-volume bracket, 2-wall, 3-longitudinal structural steel bar, 4-longitudinal horizontal tension steel bar, 5-bending steel bar and 6-horizontal stirrup.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
The embodiment of the utility model provides a: a large-volume bracket reinforcement structure is disclosed, as shown in the attached figures 1-6, comprising a large-volume bracket 1 positioned at the upstream of a wall body 2, wherein the large-volume bracket 1 is formed by pouring concrete and various reinforcement in a mixing way, the reinforcement comprises longitudinal horizontal tension steel bars 4 and bending steel bars 5 positioned at the outer edge of the outline of the large-volume bracket 1, the longitudinal horizontal tension steel bars 4 and the bending steel bars 5 are arranged in parallel in horizontal rows, the reinforcement further comprises longitudinal construction steel bars 3 vertically arranged with the longitudinal horizontal tension steel bars 4 and the bending steel bars 5, the longitudinal construction steel bars 3 are distribution steel bars of the longitudinal horizontal tension steel bars 4 and the bending steel bars 5, the longitudinal construction steel bars 3 are also arranged in parallel in vertical rows, the reinforcement further comprises horizontal stirrups 6 positioned inside the large-volume bracket 1 and arranged in the horizontal direction, the horizontal stirrups 6 are arranged in multiple rows along the vertical direction and are arranged in a multilayer structure, horizontal stirrup 6 adopts HRB400 level reinforcing bar, and the diameter is 20 ~ 25mm, and vertical, fore-and-aft interval is 1000 ~ 1500mm between adjacent horizontal stirrup 6.
The longitudinal horizontal tension steel bars 4, the bending steel bars 5 and the longitudinal structural steel bars 3 are HRB 400-grade steel bars, the diameter of the HRB 400-grade steel bars is 20-36 mm, and 5-8 steel bars are arranged per meter.
The utility model discloses a realize through following technical scheme.
The replacement of the horizontal stirrups 6 and the construction quality and safety control of concrete are carried out by calculating and selecting the longitudinal horizontal tension steel bars 4 of the large-volume bracket 1 with reasonable section size and the design value of bearing capacity, namely, the height of the rising layer of the large-volume bracket 1 during pouring is not more than 2m, the height of the layer of the first-bin concrete at the bottom is not more than 1m during pouring, and the upper structure can be continuously poured after the strength of the first-bin concrete reaches 75% of the design age. After the large-volume corbel 1 concrete is poured on the top surface, when the concrete reaches 28 days of design strength, the supporting template can be detached, and a construction organization scheme is formulated by a construction unit and approved by a supervision unit. The method has the advantages that the method can optimize reinforcement parameters, enhance construction quality control, save engineering investment, facilitate construction, and achieve the purposes of economy and rationality by deep research in several aspects.
Namely, the section size of a large-volume bracket 1 positioned at the upstream of a wall body 2 is firstly regulated to be P in specification169And (4) checking the crack control condition of the section 13.8.1, and if the crack control condition is not met, readjusting until the crack control condition meets the requirements.
Then the vertical concentrated force load acting on the top of the large-volume bracket 1 is combined, and the standard middle P is adopted171～173The longitudinal horizontal tension steel bar 4 of the large-volume bracket 1 is calculated and analyzed by the section of 13.8.2-3, and a finite element stress graph method is applied according to the specification P221Appendix D chapter clause for relevant checking.
And finally, considering the existence of external adverse factors and structural safety reserves, suggesting that the reinforcement area of the longitudinal horizontal tension steel bar 4 is not less than 2/3 times of the minimum reinforcement ratio and meets the reinforcement area of the longitudinal horizontal tension steel bar 4 determined by a standard calculation method and a finite element method. Horizontal stirrup 6 adopts HRB400 level reinforcing bar, diameter 20 ~ 25mm, and vertical, horizontal interval are 1000 ~ 1500mm, and diameter, interval can combine bracket scale and engineering characteristics to adjust, and horizontal stirrup 6's total cross sectional area should carry out the reinforcing bar according to the principle that reinforcing bar bearing capacity design value equals and replace, replaces low one-level reinforcing bar with high one-level reinforcing bar promptly, corresponding increase stirrup diameter simultaneously and transfers the stirrup interval greatly.
The reinforcing parameters of the longitudinal horizontal tension steel bar 4, the bending steel bar 5 (if necessary), the horizontal stirrup 6 and the longitudinal construction steel bar 3 are convenient for construction. The construction quality and safety control related requirements are made, namely the height of the lifting layer is not more than 2m when the large-volume bracket 1 is poured, the height of the lifting layer is not more than 1m when the first-bin concrete at the bottom is poured, and meanwhile, the superstructure can be continuously poured after the strength of the first-bin concrete reaches 75% of the design age.
Claims (2)
1. The utility model provides a bulky bracket reinforcement structure which characterized in that: the large-size corbel formwork comprises a large-size corbel (1) positioned on the upper stream of a wall body (2), wherein the large-size corbel (1) is formed by pouring concrete and reinforcing bars in a mixed mode, the reinforcing bars comprise longitudinal horizontal tension reinforcing bars (4) and bending reinforcing bars (5) which are positioned on the outer edge of the outline of the large-size corbel (1) in horizontal rows and are arranged in parallel, longitudinal construction reinforcing bars (3) which are vertically arranged with the longitudinal horizontal tension reinforcing bars (4) and the bending reinforcing bars (5) and are parallel to each other, and horizontal stirrups (6) which are positioned inside the large-size corbel (1) and are arranged in a longitudinal and vertical multi-layer mode along the horizontal direction; the horizontal stirrups (6) adopt HRB 400-grade steel bars, the diameter is 20-25 mm, and the vertical and longitudinal intervals between every two adjacent horizontal stirrups (6) are 1000-1500 mm.
2. The high-volume corbel reinforcement structure according to claim 1, wherein: the longitudinal horizontal tension steel bars (4), the bent steel bars (5) and the longitudinal structural steel bars (3) are HRB 400-grade steel bars, the diameter of the HRB 400-grade steel bars is 20-36 mm, and 5-8 steel bars are arranged per meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020120773.4U CN212001927U (en) | 2020-01-19 | 2020-01-19 | Large-size bracket reinforcement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020120773.4U CN212001927U (en) | 2020-01-19 | 2020-01-19 | Large-size bracket reinforcement structure |
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| Publication Number | Publication Date |
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| CN212001927U true CN212001927U (en) | 2020-11-24 |
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| CN202020120773.4U Active CN212001927U (en) | 2020-01-19 | 2020-01-19 | Large-size bracket reinforcement structure |
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| CN (1) | CN212001927U (en) |
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2020
- 2020-01-19 CN CN202020120773.4U patent/CN212001927U/en active Active
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