Concrete formwork based on permanent steel casing overhanging bracket supporting combined profile steel
By cantilevering the concrete formwork of the composite steel on the permanent steel casing, the problem of setting up large-volume concrete formwork for high-altitude cast-in-place cast-in-place cast-in-place high-altitude cast-in-place large-volume concrete formwork after the beach is cut and receded, the stability and load transfer of the formwork are achieved, and the cost is reduced and turnover efficiency is improved.
Patent Information
- Application Number
- CN202421611654.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-09
AI Technical Summary
When cutting the beach and retreating to build a port, there are difficulties in setting up large-volume concrete forms with high altitude cast-in-place water. The existing technology, such as building a floor-standing full-house bracket or a hoop system, has stability problems, high cost and low turnover efficiency.
A concrete formwork based on the permanent steel cantilevered beef leg supports combined steel. A permanent steel casing is provided on the bored pile. The side wall welds to support the beef leg, which supports the main beam and distribution beam stiffener plates. Combined with the rubber adjustment cushion layer and the full-house support bracket, ensures the stability and load transfer of the formwork.
It effectively solved the problem of setting up large-volume concrete formwork at high altitudes in water, improved the stability and compressive strength of the formwork support structure, reduced costs and improved turnover efficiency.
Smart Images
Figure CN222822322U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building engineering construction, in particular to a concrete formwork based on a permanent steel casing cantilevered corbel supporting combined steel. Background Art
[0002] In civil engineering, transportation, water conservancy and other projects, large-volume concrete structures are often used as the main load-bearing components. When pouring large-volume concrete, the bottom and sides of the concrete formwork are respectively subjected to large vertical and lateral pressures. In order to prevent the formwork from expanding and concrete leaking, higher requirements are placed on the formwork system.
[0003] When large-volume concrete is cast-in-place, it is only necessary to reinforce its foundation to ensure the vertical bearing capacity requirements of the bottom formwork. Taking the high-pile beam-slab wharf constructed on dry land for port construction after beach cutting as an example, the wharf pile foundation can be bored and cast-in-place, and the lower crossbeam of the wharf can be cast-in-place on the ground. However, considering the need to leave sufficient working surface for beach cutting and port construction to facilitate the construction of the port slope protection, after the construction of the lower crossbeam is completed, the port basin needs to be excavated, the beach cutting and retreating form the port basin, and the slope protection construction can be carried out before the next process can be carried out. Therefore, after the installation of the prefabricated longitudinal beams, the foundation concrete of the crane pier of the wharf faces the complex working condition of high-altitude pouring over water.
[0004] Conventional methods for suspended concrete pouring include building a ground-to-ground full-height bracket as a formwork support system. However, when the beach is cut and the port is built, the lower part of the formwork is an inclined slope, and the work is done near the water, so it is impossible to build a stable ground-to-ground full-height bracket. The second method is to set up a clamp on the pile foundation at the bottom of the dock platform as a formwork support. However, the bored pile foundation of dry land construction often has a permanent steel casing due to durability and appearance quality control requirements, which makes it inconvenient to set up a steel clamp. In addition, the clamp system has high cost and low turnover efficiency, which is not conducive to quality, cost and progress control. Utility Model Content
[0005] The utility model aims to solve the problems in the background technology and proposes a concrete formwork based on permanent steel casing cantilevered corbels supporting combined steel.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A concrete formwork based on a permanent steel casing cantilevered corbel supporting a composite steel, comprising a bored cast-in-place pile, a permanent steel casing is arranged on the upper part of the bored cast-in-place pile, a supporting corbel is welded on the side wall of the permanent steel casing, a supporting main beam is welded on the supporting corbel, distribution beams are evenly arranged on the upper flange of the supporting main beam, and the distribution beams and the supporting main beams are overlapped vertically and horizontally, and a bracket upright sleeve is welded on the upper flange of the distribution beam;
[0008] A cast-in-place lower cross beam is cast on the permanent steel casing, a prefabricated longitudinal beam is hung on the cast-in-place lower cross beam, a full-span support bracket is inserted into the sleeve of the bracket upright, and a crane foundation concrete formwork is provided on the full-span support bracket.
[0009] Preferably, a rubber adjustment pad is adhered to the supporting corbel.
[0010] Preferably, supporting main beam stiffening ribs are welded on both sides of the web of the supporting main beam, and the supporting main beam stiffening ribs are arranged in geometric series with the mid-span of the supporting main beam I-beam as the center.
[0011] Preferably, the distribution beam is fixed to the upper flange of the supporting main beam by electric welding.
[0012] Preferably, distribution beam stiffening ribs are welded on both sides of the distribution beam, and the distribution beam stiffening ribs are arranged in geometric series with the middle of the span of the distribution beam I-beam as the center.
[0013] Preferably, the full-hall support bracket includes vertical poles, and the vertical poles are inserted into the bracket vertical pole sleeves, and horizontal cross bars and scissors braces are jointly erected on multiple vertical poles.
[0014] Preferably, an adjustable support is provided on the vertical pole, square timber is laid on the adjustable support, and the crane foundation concrete formwork includes a concrete bottom formwork and side forms, and the concrete bottom formwork and side forms are erected on the square timber.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] When the I-beam of the supporting main beam is deformed by force, the utility model makes the I-beam of the supporting main beam always close to the supporting corbel through the elastic adjustment of the rubber adjustment pad, so that each supporting corbel can provide supporting force for the supporting main beam, and ensure the stability of the supporting structure; the reinforcing ribs of the supporting main beam are densely arranged according to the bending moment distribution of the I-beam of the supporting main beam, so as to effectively improve the compressive strength; the distribution beam and the supporting main beam are overlapped and arranged vertically and horizontally, and the distribution beam and the upper flange of the supporting main beam are fixed by electric welding, so as to effectively transmit the upper load in layers and evenly to the supporting corbel, so as to ensure the overall stability of the formwork supporting main beam system; the reinforcing ribs of the distribution beam are densely arranged according to the bending moment distribution of the I-beam of the distribution beam, so as to effectively improve the compressive strength, and solve the problem of erecting large-volume cast-in-place concrete formwork near the water on the pile foundation with permanent steel casing when building a port after cutting the beach. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The utility model is a schematic structural diagram of a concrete formwork based on a permanent steel casing cantilevered corbel supporting combined steel.
[0018] In the figure: 1 bored cast-in-place piles, 2 cast-in-place lower cross beams, 3 precast longitudinal beams, 4 harbor basins, 5 crane foundation concrete formwork, 6 supporting corbels, 7 supporting main beams, 8 distribution beams, 9 full-span support brackets, 10 crane foundations, 11 permanent steel casing, 12 rubber adjustment pads, 13 bracket upright sleeves. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0020] Reference Figure 1 , based on the concrete formwork of the combined steel with the cantilevered corbels supported by the permanent steel casing, including bored cast-in-place piles 1, firstly, the bored cast-in-place piles 1 should be constructed on the original ground as the wharf pile foundation, and the upper covering soil of the bored cast-in-place piles 1 should be removed so that the upper part of the pile foundation is placed in water and air. In order to ensure the durability and appearance quality of the pile foundation and avoid mechanical damage to the steel bar protective layer of the pile foundation during the beach cutting and excavation process, a permanent steel casing 11 is provided on the upper part of the bored cast-in-place piles 1 to ensure the durability of the structure and improve the appearance quality of the structure;
[0021] After the bored pile 1 is completed, a formwork is set up on the original ground to cast the cast-in-place lower cross beam 2. After excavation to 1m below the top elevation of the bored pile 1, the excavated soil layer is used as the working surface. A support bracket 6 is welded to the side wall of the permanent steel casing 11. The support bracket 6 is fully welded to the permanent steel casing 11 on both sides. The distance from the top elevation of the support bracket 6 to the bottom elevation of the cast-in-place lower cross beam 2 is "1.05 times to 11 times the sum of the heights of the I-beams of the supporting main beam 7 and the I-beams of the distribution beam 8. According to this distance, a rubber adjustment pad 12 is pasted on the support bracket 6 to adjust the top elevation of the support bracket 6. The height distance from the bottom of the cast-in-place lower cross beam 2 is set to be 1.05 to 11 times the sum of the heights of the I-beams of the supporting main beam 7 and the I-beams of the distribution beam 8, so as to reserve space for pasting the rubber adjustment pad 12. The function of the rubber adjustment pad 12 is to enable the I-beams of the supporting main beam 7 to be close to the supporting corbels 6. When the I-beams of the supporting main beam 7 are deformed by force, the elastic adjustment of the rubber adjustment pad 12 makes the I-beams of the supporting main beam 7 always close to the supporting corbels 6, ensuring that each supporting corbel 6 can provide support for the supporting main beam 7 and ensure the stability of the supporting structure.
[0022] The supporting main beam 7 is welded on the supporting corbel 6, and the I-beam of the supporting main beam 7 is spot welded to the supporting corbel 6. The supporting main beam stiffening ribs are welded on both sides of the web of the supporting main beam 7, and the supporting main beam stiffening ribs are arranged in geometric progression with the mid-span of the I-beam of the supporting main beam 7 as the center, and the mid-span of each I-beam of the supporting main beam 7 is taken as the center, and the intervals are 15cm, 30cm, 60cm, 120cm... in sequence. The supporting main beam stiffening ribs are densely arranged according to the bending moment distribution of the I-beam of the supporting main beam 7, so as to effectively improve its compressive strength;
[0023] The upper flange of the supporting main beam 7 is evenly arranged with distribution beams 8, and the distribution beams 8 and the supporting main beams 7 are overlapped vertically and horizontally. The distribution beams 8 and the upper flanges of the supporting main beams 7 are fixed by electric welding, which effectively transfers the upper load to the supporting corbels 6 in layers and evenly, ensuring the overall stability of the template supporting main beam system. The distribution beam stiffening ribs are welded on both sides of the distribution beam 8. The distribution beam stiffening ribs are arranged at intervals of 15cm, 30cm, 60cm, 120cm... in a geometric progression, with the middle of the span of the I-beam of the distribution beam 8 as the center. The distribution beam stiffening ribs are arranged densely according to the bending moment distribution of the I-beam of the distribution beam 8, which effectively improves its compressive strength;
[0024] The hoisted prefabricated longitudinal beam 3 is placed on the cast-in-place lower cross beam 2, and the upper flange of the distribution beam 8 is welded with a bracket upright sleeve 13, and a full-span support bracket 9 is inserted in the bracket upright sleeve 13. The full-span support bracket 9 includes an upright, and the upright is inserted in the bracket upright sleeve 13. Horizontal cross bars and scissors braces are jointly erected on multiple uprights. A crane foundation concrete formwork 5 is provided on the full-span support bracket 9, and an adjustable support is provided on the upright, and square timber is laid on the adjustable support. The crane foundation concrete formwork 5 includes a concrete bottom formwork and a side formwork, and the concrete bottom formwork and the side formwork are erected on the square timber.
[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A concrete formwork based on permanent steel casing cantilevered corbels supporting composite steel, comprising bored cast-in-place piles (1), characterized in that: A permanent steel casing (11) is provided on the upper part of the bored pile (1), a supporting bracket (6) is welded on the side wall of the permanent steel casing (11), a supporting main beam (7) is welded on the supporting bracket (6), distribution beams (8) are evenly arranged on the upper flange of the supporting main beam (7), and the distribution beams (8) and the supporting main beam (7) are arranged in a longitudinal and transverse overlapping manner, and a bracket upright sleeve (13) is welded on the upper flange of the distribution beam (8); A cast-in-place lower cross beam (2) is cast on the permanent steel casing (11), a prefabricated longitudinal beam (3) is suspended on the cast-in-place lower cross beam (2), a full-height support bracket (9) is inserted into the bracket upright sleeve (13), and a crane foundation concrete formwork (5) is provided on the full-height support bracket (9).
2. The concrete formwork based on permanent steel casing cantilevered corbel support combined steel according to claim 1 is characterized in that: A rubber adjustment cushion layer (12) is adhered to the supporting corbel (6).
3. The concrete formwork based on permanent steel casing cantilevered corbel support combined steel according to claim 1 is characterized in that: Supporting main beam stiffening ribs are welded on both sides of the web of the supporting main beam (7), and the supporting main beam stiffening ribs are arranged in geometrically proportional rows with the center of the I-beam span of the supporting main beam (7) as the center.
4. The concrete formwork based on permanent steel casing cantilevered corbel support combined steel according to claim 1 is characterized in that: The distribution beam (8) is fixed to the upper flange of the supporting main beam (7) by electric welding.
5. The concrete formwork based on permanent steel casing cantilevered corbel support combined steel according to claim 1 is characterized in that: Distribution beam stiffening ribs are welded on both sides of the distribution beam (8), and the distribution beam stiffening ribs are arranged in geometric series with the middle of the I-beam span of the distribution beam (8) as the center.
6. The concrete formwork based on permanent steel casing cantilevered corbel support combined steel according to claim 1 is characterized in that: The full-hall support bracket (9) comprises a vertical pole, and the vertical pole is inserted into the bracket vertical pole sleeve (13), and a plurality of the vertical poles are jointly provided with a horizontal cross bar and a scissors brace.
7. The concrete formwork based on permanent steel casing cantilevered corbel support combined steel according to claim 6 is characterized in that: The vertical pole is provided with an adjustable support, and square timber is laid on the adjustable support. The crane foundation concrete formwork (5) comprises a concrete bottom formwork and a side formwork, and the concrete bottom formwork and the side formwork are erected on the square timber.