CN220364865U - Integral cast-in-situ concrete bracket structure - Google Patents
Integral cast-in-situ concrete bracket structure Download PDFInfo
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- CN220364865U CN220364865U CN202223430919.3U CN202223430919U CN220364865U CN 220364865 U CN220364865 U CN 220364865U CN 202223430919 U CN202223430919 U CN 202223430919U CN 220364865 U CN220364865 U CN 220364865U
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- 239000004567 concrete Substances 0.000 title claims abstract description 32
- 238000011065 in-situ storage Methods 0.000 title abstract description 14
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 34
- 239000007787 solid Substances 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 claims description 47
- 238000010276 construction Methods 0.000 abstract description 40
- 230000008901 benefit Effects 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 238000007599 discharging Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 238000005056 compaction Methods 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 101100510615 Caenorhabditis elegans lag-2 gene Proteins 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 241001426407 Umbrina coroides Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses an integral cast-in-situ concrete bracket structure, which is characterized in that: the pier comprises a pier column (1), and reinforced concrete brackets (2) are integrally poured at the solid section of the pier top of the pier column (1). The utility model has the following characteristics: the integral cast-in-situ concrete bracket is constructed, the mounting operation of the embedded rigid support bracket is directly optimized and canceled, the widened part of concrete can be used as a construction platform, the stability is improved, the construction quality is ensured, the construction period is shortened, and the economic and social benefits are obvious.
Description
Technical Field
The utility model relates to a construction technology of a No. 0 section of a continuous rigid frame bridge, in particular to an integral cast-in-situ concrete bracket structure.
Background
Along with the development of the tide of highway construction in China from plain micro-hills to mountain heavy-hills, the highway in the mountain is relatively wide in application due to poor topography conditions along the line of the mountain, complex geological structure and more conditions of crossing valleys and rivers. The continuous rigid frame bridge has the advantages of attractive pier column form and low cost compared with the same-span arch bridge, suspension bridge and cable-stayed bridge due to larger span, so that the continuous rigid frame bridge is widely applied to bridge construction in mountain areas.
Rigid frame bridges generally consist essentially of a number 0 section, a standard section, a cast-in-place section, and a closure section. At present, the construction of the No. 0 section is mainly carried out by adopting a high-altitude bracket method. The high-altitude bracket method is to carry out bracket erection by utilizing the pre-buried rigid bracket, the sand cylinder, the bracket, the distribution beam and the steel mould (wood mould) of the pier column after construction, so as to finish the construction working surface of the No. 0 section. The following restriction factors mainly exist in the adoption of the construction method: the accuracy of the pier stud embedded bracket key box directly influences the safety and stability of the whole bracket system; the welding (bolting) quality of the rigid support bracket influences the safety of the whole bracket; the risk of mounting the large rigid support bracket is high because of high-altitude operation; the installation and dismantling period is longer, and the construction progress is affected; in the construction process, errors exist in settlement observation of the rigid support bracket.
Chinese patent 201620376340.9 discloses a rigid frame bridge number 0 section support, including setting up a plurality of assembled brackets in pier stud both sides, in the embedded groove on the pier stud was gone into to the bottom card of assembled bracket, be provided with the sand drum on the roof of assembled bracket, placed several main longerons on the sand drum of every side, several main longeron top intermediate position departments are provided with the bolster reinforcing bar, connect through horizontal overload roof beam between the bolster reinforcing bar of pier stud both sides, be provided with die block system and other support systems on horizontal overload roof beam. The bracket adopts an assembled bracket, and the construction process is simplified, but the bracket still needs high-altitude operation.
Disclosure of Invention
The utility model aims to provide an integral cast-in-situ concrete bracket structure. The installation operation of the pre-buried rigid support bracket is canceled, a construction procedure with the greatest safety risk of operators is avoided, and the overhead operation amount is greatly reduced.
The technical scheme of the utility model is as follows: a cast-in-place concrete bracket structure of whole includes the pier stud, has pour the reinforced concrete bracket wholly in the solid section position in pier top of pier stud.
According to the integral cast-in-situ concrete bracket structure, the width above the reinforced concrete bracket is 40-80 cm.
In the integral cast-in-situ concrete bracket structure, the width above the reinforced concrete bracket is 50-70 cm.
According to the integral cast-in-situ concrete bracket structure, the outer sides of the pier columns are the same in width up and down, and the reinforced concrete brackets are poured on the outer sides.
According to the integral cast-in-situ concrete bracket structure, the section of the reinforced concrete bracket is trapezoid or rectangular.
According to the integral cast-in-situ concrete bracket structure, the reinforced concrete bracket is provided with the sand cylinder, and the sand cylinder is provided with the longitudinal beam which is connected with the bracket.
The utility model has the beneficial effects that: the utility model has the following characteristics:
safety features
1. The integral cast-in-situ concrete bracket construction directly optimizes and cancels the installation operation of the pre-buried rigid support bracket, avoids the construction procedure with the largest safety risk of operators, greatly reduces the high-altitude work load and reduces the safety management risk of projects.
2. The pier top working area is increased, the widened part of concrete can be used as a construction platform for installing a subsequent bracket system, the safety protection effect is achieved, the investment is reduced, and the risk is reduced.
3. The integral concrete bracket improves the stability of the bracket, reduces the local stress concentration of the bracket caused by the installation error of the rigid bracket, and influences the construction safety.
Quality characteristics
1. The problem that the quality of the pier is affected due to eccentric compression of the pier column caused by uneven stress among piers and beside piers in the construction process of the No. 0 section of the rigid support bracket is avoided.
2. Because the integral concrete rigid support is adopted, the settlement observation of the integral support system is more convenient, so that the construction mode can be timely adjusted in the construction process, and the integral construction quality is ensured.
Construction period characteristics
1. And the concrete bracket and the pier column are integrally poured, so that the mounting time of the rigid support bracket is saved, and the on-site progress control and management are facilitated.
2. The welding and bolting time of the rigid support is reduced, the working efficiency is improved, and the construction period is effectively shortened.
The technology of the utility model has the following economic and social benefits:
the construction process of the integral cast-in-situ concrete bracket of the No. 0 section of the continuous rigid frame bridge is applied, so that the construction period is greatly shortened, the cost investment in site management of construction enterprises is reduced, and the utilization rate of equipment is improved.
By taking a certain project as an example, the comprehensive benefit of the construction method is analyzed, and compared with the traditional high-altitude bracket method, the construction period is shortened by 45 days, and the construction cost is shortened. Specific benefits are shown in the following Table
TABLE 1 economic benefits statistics
According to economic benefit comparison analysis, the construction cost of a single No. 0 section construction is saved by 23.46 ten thousand yuan. If the construction method is popularized to the field of continuous rigid frame bridge No. 0 section engineering construction, the economic benefit is quite huge.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic view of the construction state of the present utility model.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
Example 1 of the present utility model: the integral cast-in-situ concrete bracket structure comprises a pier column 1, wherein reinforced concrete brackets 2 are integrally poured at the solid section position of the pier top of the pier column 1.
The width above the reinforced concrete bracket 2 is 40-80 cm, so that the girder is convenient to install. More preferably, the width of the reinforced concrete bracket 2 is 50-70 cm.
The outer sides of the pier columns 1 are the same in width up and down, and reinforced concrete brackets 2 are poured on the outer sides. The pier column 1 has the same width from top to bottom at the outer side, and the difficulty of installing the embedded bracket is higher, so that the pier column is more suitable for the reinforced concrete bracket 2. As shown in fig. 1 and 2, the reinforced concrete bracket 2 may be designed in a trapezoid shape, a rectangular shape, or the like.
The reinforced concrete bracket 2 is provided with a sand cylinder 3, the sand cylinder 3 is provided with a longitudinal beam 4, and the longitudinal beam 4 is connected with a bracket 5.
The method comprises the following specific steps:
1. setting the height according to the drawing when the pier stud is constructed, and lofting the reinforced concrete bracket;
2. pouring solid sections of the pier column 1 and concrete of the reinforced concrete bracket 2;
3. a No. 0 beam section bracket is arranged on the reinforced concrete bracket 2; the reinforced concrete bracket 2 is provided with a sand cylinder 3, I-steel I56a is adopted for welding to form a bearing longitudinal beam 4, and the longitudinal beam 4 is arranged on the sand cylinder 3. And adopting phi 32 finely-pricked screw thread steel for opposite pulling, preventing the main beam from sliding, enhancing the overall stability and ensuring the safety of the bracket. The support 5 for construction is arranged on the longitudinal beam 4 and comprises a main beam, a secondary distribution beam, a longitudinal support beam, a tray support and the like, and a bottom die is paved after the secondary distribution beam is arranged.
4. Prepressing the No. 0 beam section support; the pre-compaction adopts sand cylinder 3, and every sand is simplified 3 and is pressed 120 tons, carries out the pre-compaction through laboratory press to sand cylinder, according to 20% → 60% → 80% → 100% step by step load, and every stage load reaches load next level load after stabilizing, until the pre-compaction maximum load, confirms the compression value under the load effect, measures sand cylinder and satisfies the dress sand height under the maximum pressure.
The sand cylinder 3 is manufactured as follows: the outer diameter of the upper cylinder is 440mm, the wall thickness of the steel pipe is 10mm, the height of the steel pipe is 150mm, and C50 concrete is poured into the steel pipe; the sand discharging cylinder is a steel pipe with the outer diameter of 480mm and the wall thickness of 10mm, the height of the sand discharging cylinder is 190mm, the top and the bottom plate of the sand discharging cylinder are made of steel plates with the thickness of 500mm and 500mm, sand discharging holes with the diameter of 30mm are arranged at the bottom of the sand discharging cylinder, and the sand discharging cylinder is filled with carefully selected engineering sand (the engineering sand is required to be clean without mud, and the engineering sand is screened after being dried, and fine sand with the particle size of 1.6-2.5mm is selected). When the frame falls, the bolts close to the bottom of the lower cylinder are loosened to draw out sand, so that the main beam falls down, and the beam mold is removed.
5. Erecting a mould on the bracket 5 and binding reinforcing steel bars;
6. positioning longitudinal, transverse and vertical prestressed pipelines, and embedding vertical prestressed steel bundles;
7. pouring No. 0 concrete, and demoulding after the required age is reached;
8. symmetrically tensioning the No. 0 beam section to correspond to the longitudinal steel bundles and anchoring and grouting after the concrete strength reaches 95% of the design strength and the age is not less than 5 days; (after the prestress tensioning is finished, special grouting material is timely poured into the prestress pipeline by adopting vacuum auxiliary grouting, and the following steps are adopted).
9. Tensioning No. Liang Duanheng, vertical prestressed reinforcement and anchoring (lag 2 beams Duan Zhangla horizontal-vertical prestressing);
10. and finishing the construction of the No. 0 beam section.
Example 2 of the present utility model: a cast-in-place concrete bracket structure of whole, includes pier stud 1, has pour reinforced concrete bracket 2 wholly in pier top solid section position of pier stud 1.
The width above the reinforced concrete bracket 2 is 60 cm.
The outer side of the pier stud 1 is wide up and down, and reinforced concrete brackets 2 are poured on the outer side, and the reinforced concrete brackets 2 are trapezoid.
The reinforced concrete bracket 2 is provided with a sand cylinder 3, the sand cylinder 3 is provided with a longitudinal beam 4, and the longitudinal beam 4 is connected with a bracket 5.
The method comprises the following specific steps: 1. setting the height according to the drawing when the pier stud is constructed, and lofting the reinforced concrete bracket;
2. pouring the solid section of the pier column 1 and the reinforced concrete bracket 2 to form concrete until the strength of the concrete meets the requirement;
3. a No. 0 beam section bracket is arranged on the reinforced concrete bracket 2; the reinforced concrete bracket 2 is provided with a sand cylinder 3, I-steel I56a is adopted for welding to form a bearing longitudinal beam 4, and the longitudinal beam 4 is arranged on the sand cylinder 3. And adopting phi 32 finely-pricked screw thread steel for opposite pulling, preventing the main beam from sliding, enhancing the overall stability and ensuring the safety of the bracket. The longitudinal beam 4 is provided with a bracket 5 for construction, which comprises a main beam, a secondary distribution beam, a longitudinal supporting beam, a tray support, a protective fence, a construction platform and the like.
4. Prepressing the No. 0 beam section support; the pre-compaction adopts sand cylinder 3, and every sand is simplified 3 and is pressed 120 tons, carries out the pre-compaction through laboratory press to sand cylinder, according to 20% → 60% → 80% → 100% step by step load, and every stage load reaches load next level load after stabilizing, until the pre-compaction maximum load, confirms the compression value under the load effect, measures sand cylinder and satisfies the dress sand height under the maximum pressure.
The sand cylinder 3 is manufactured as follows: the outer diameter of the upper cylinder is 440mm, the wall thickness of the steel pipe is 10mm, the height of the steel pipe is 150mm, and C50 concrete is poured into the steel pipe; the sand discharging cylinder is a steel pipe with the outer diameter of 480mm and the wall thickness of 10mm, the height of the sand discharging cylinder is 190mm, the top and the bottom plate of the sand discharging cylinder are made of steel plates with the thickness of 500mm and 500mm, sand discharging holes with the diameter of 30mm are arranged at the bottom of the sand discharging cylinder, and the sand discharging cylinder is filled with carefully selected engineering sand (the engineering sand is required to be clean without mud, and the engineering sand is screened after being dried, and fine sand with the particle size of 1.6-2.5mm is selected). When the frame falls, the bolts close to the bottom of the lower cylinder are loosened to draw out sand, so that the main beam falls down, and the beam mold is removed.
5. Erecting a die on a bracket, and binding reinforcing steel bars;
6. positioning longitudinal, transverse and vertical prestressed pipelines, and embedding vertical prestressed steel bundles;
7. pouring No. 0 concrete, and demoulding after the required age is reached;
8. symmetrically tensioning the No. 0 beam section to correspond to the longitudinal steel bundles and anchoring and grouting after the concrete strength reaches 95% of the design strength and the age is not less than 5 days; (after the prestress tensioning is finished, special grouting material is timely poured into the prestress pipeline by adopting vacuum auxiliary grouting, and the following steps are adopted).
9. Tensioning No. Liang Duanheng, vertical prestressed reinforcement and anchoring (lag 2 beams Duan Zhangla horizontal-vertical prestressing);
10. and finishing the construction of the No. 0 beam section.
Claims (2)
1. A cast-in-place concrete bracket structure of whole, its characterized in that: the pier comprises a pier column (1), wherein reinforced concrete brackets (2) are integrally poured at the solid section of the pier top of the pier column (1); the width above the reinforced concrete bracket (2) is 40-80 cm; the outer sides of the pier columns (1) are the same in width up and down, and reinforced concrete brackets (2) are poured on the outer sides; the section of the reinforced concrete bracket (2) is trapezoid or rectangular; the reinforced concrete bracket is characterized in that a sand cylinder (3) is arranged on the reinforced concrete bracket (2), a longitudinal beam (4) is arranged on the sand cylinder (3), and the longitudinal beam (4) is connected with a bracket (5).
2. The integral cast-in-place concrete bracket structure of claim 1, wherein: the width above the reinforced concrete bracket (2) is 50-70 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223430919.3U CN220364865U (en) | 2022-12-21 | 2022-12-21 | Integral cast-in-situ concrete bracket structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223430919.3U CN220364865U (en) | 2022-12-21 | 2022-12-21 | Integral cast-in-situ concrete bracket structure |
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| Publication Number | Publication Date |
|---|---|
| CN220364865U true CN220364865U (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223430919.3U Active CN220364865U (en) | 2022-12-21 | 2022-12-21 | Integral cast-in-situ concrete bracket structure |
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| Country | Link |
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| CN (1) | CN220364865U (en) |
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2022
- 2022-12-21 CN CN202223430919.3U patent/CN220364865U/en active Active
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