Steel reinforcement framework platform for open caisson construction

Abstract

The utility model discloses a steel reinforcement framework platform for open caisson construction, which comprises an open caisson lower-layer main body which sinks in place and is to be heightened, a blade foot is arranged on the circumference of the bottom of the wall of the open caisson lower-layer main body, a cross beam is arranged in the open caisson lower-layer main body, and the top of the cross beam is flush with the top of the blade foot. The inner side faces of the blade feet protrude out of the wall of the open caisson lower layer main body, so that bearing platforms are formed at the tops of the blade feet, a plurality of longitudinal section steel are in lap joint between the front side bearing platform and the cross beam and between the rear side bearing platform and the cross beam, the longitudinal section steel is horizontally laid at intervals, and the two ends of the longitudinal section steel are fixed to the corresponding bearing platforms or the cross beam. A plurality of transverse section steel is arranged above the longitudinal section steel, the transverse section steel extends between the left side bearing platform and the right side bearing platform and is horizontally laid at intervals, the longitudinal section steel and the transverse section steel are combined to form a framework platform, a full framing is erected on the framework platform, and the height of the full framing is matched with the design height of the open caisson upper layer body. The utility model has the advantages of simple construction process and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of underground station construction, in particular to a steel bar skeleton platform for caisson construction. Background Art

[0002] The caisson construction method was first used in the construction of underground stations. The station caisson is usually a rectangular frame structure, constructed with a cast-in-place concrete frame and assembled board wall combination. Each caisson can be made in 4 times and sunk in 2 times. The first two times of making complete the lower body of the caisson, and then the lower body is sunk. After the lower body is sunk into place, the last two times of making the caisson are made directly above the lower body to complete the upper body of the caisson. At the same time, the connection of the upper and lower bodies is also completed, and finally the caisson is sunk into place as a whole. In this process, after the first sinking, the caisson needs to be filled with water, and a platform is built on the water using steel brackets and Bailey beams. It is used as the construction platform for the last two times of making the caisson. To build this construction platform, a large number of steel plates need to be pre-buried in the caisson construction to create conditions for the construction of steel brackets. The construction efficiency is low, and the construction process of Bailey beams is complicated, the construction time is long, and it is inconvenient to disassemble. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model aims to provide a steel frame platform for caisson construction, so as to solve the problems of complex structure, long construction time and high construction cost of the construction platform that needs to be overlapped after the caisson sinks for the first time.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a steel skeleton platform for caisson construction, including a caisson lower body that is sunk into place and to be connected to a height, a blade foot is arranged around the bottom of the wall of the caisson lower body, a cross beam is arranged inside the lower body of the caisson, the top of the cross beam is flush with the top of the blade foot, the inner side of the blade foot protrudes from the wall of the lower body of the caisson, thereby forming a pedestal at the top of the blade foot, a plurality of longitudinal steel sections are overlapped between the front pedestal and the cross beam, and between the rear pedestal and the cross beam, the longitudinal steel sections are laid horizontally at intervals, and the end heads of the longitudinal steel sections are fixed on the corresponding pedestals or cross beams, a plurality of transverse steel sections are arranged above the longitudinal steel sections, the transverse steel sections extend between the left and right pedestals, and are laid horizontally at intervals, each of the longitudinal and transverse steel sections is combined to form a skeleton platform, a full-height bracket is erected on the skeleton platform, and the height of the full-height bracket matches the design height of the upper body of the caisson.

[0005] In the above scheme: the transverse steel and the longitudinal steel are both I-beams, which have high strength and strong bending resistance.

[0006] In the above scheme: the transverse steel and the longitudinal steel are fixed at the contact point by spot welding, which plays the role of reinforcing the skeleton platform.

[0007] In the above scheme: the end of the longitudinal steel or transverse steel is fixed by a 20cm φ25 anchor steel bar, the lower end of the φ25 anchor steel bar is inserted into the corresponding pedestal or cross beam, and the upper end is passed through the corresponding longitudinal steel or transverse steel to ensure the stability of the skeleton platform.

[0008] In the above scheme: each longitudinal steel section between the front pedestal and the cross beam, and each longitudinal steel section between the rear pedestal and the cross beam are reinforced and connected by transversely extending connecting steel bars. The connecting steel bars and the longitudinal steel sections are fixed by full welding at the contact point, which plays the role of reinforcing the skeleton platform.

[0009] The beneficial effects of the utility model are as follows: by forming a pedestal on the top of the blade foot, building a skeleton platform on the pedestal, and setting up a full-height bracket on the skeleton platform, the steel skeleton platform for caisson construction is completed; after the caisson sinks for the first time, the platform can be used to complete the pouring construction of the upper main body of the caisson. Compared with the traditional Bailey beam construction platform, the utility model has a simple construction process and low construction cost, which greatly reduces the number of embedded parts in caisson construction and increases construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of building a skeleton platform in the utility model.

[0011] Figure 2 It is a top view of the skeleton platform in the utility model.

[0012] Figure 3 This is a schematic diagram of the construction of a full-hall scaffold. DETAILED DESCRIPTION

[0013] like Figure 1 As shown in —3, a steel skeleton platform for caisson construction is based on the caisson lower body 1 that has sunk into place and is waiting to be connected. The bottom of the wall of the caisson lower body 1 is surrounded by blade feet 11, and a cross beam 12 is arranged inside the caisson lower body 1, and the top of the cross beam 12 is flush with the top of the blade foot 11.

[0014] The inner side of the blade foot 11 protrudes from the wall of the lower body 1 of the caisson, thereby forming a cap a on the top of the blade foot 11. A plurality of longitudinal steel sections 2 are overlapped between the front cap a and the cross beam 12, and between the rear cap a and the cross beam 12. The longitudinal steel sections 2 are laid horizontally at intervals, and both ends of the longitudinal steel sections 2 are fixed to the corresponding cap a or the cross beam 12. A plurality of transverse steel sections 3 are arranged above the longitudinal steel sections 2. The transverse steel sections 3 extend between the left and right caps a and are laid horizontally at intervals.

[0015] Each longitudinal steel section 2 and transverse steel section 3 is combined to form a skeleton platform b, on which a full-height bracket 4 is erected, and the height of the full-height bracket 4 matches the designed height of the upper body 5 of the caisson.

[0016] Preferably, the transverse steel 3 and the longitudinal steel 2 are both I-beams, which have high strength and strong bending resistance. Specifically, the longitudinal steel 2 is partially made of I45 I-beams and the other part is made of I20 I-beams; the transverse steel 3 is made of I20 I-beams.

[0017] Preferably, the transverse steel sections 3 and the longitudinal steel sections 2 are fixed at the contact points by spot welding, which serves to reinforce the skeleton platform.

[0018] Preferably, the ends of the longitudinal steel 2 or transverse steel 3 are fixed by 20 cm φ25 anchor steel bars 6, the lower ends of the φ25 anchor steel bars 6 are inserted into the corresponding pedestal a or cross beam 12, and the upper ends are passed through the corresponding longitudinal steel 2 or transverse steel 3 to ensure the construction stability of the skeleton platform b.

[0019] Preferably, each longitudinal steel section 2 between the front pedestal a and the cross beam 12, and each longitudinal steel section 2 between the rear pedestal a and the cross beam 12 are reinforced and connected by transversely extending connecting steel bars 7, and the connecting steel bars 7 and the longitudinal steel sections 2 are fixed by full welding at the contact point, thereby serving to reinforce the skeleton platform b.

Claims

1. A steel frame platform for caisson construction, comprising a caisson lower body (1) sunk into place and to be connected, a blade foot (11) is arranged around the bottom of the wall of the caisson lower body (1), a cross beam (12) is arranged inside the caisson lower body (1), and the top of the cross beam (12) is flush with the top of the blade foot (11), Features: The inner side surface of the blade foot (11) protrudes from the wall of the lower body (1) of the caisson, so that a pedestal (a) is formed on the top of the blade foot (11). A plurality of longitudinal steel sections (2) are overlapped between the front pedestal (a) and the cross beam (12), and between the rear pedestal (a) and the cross beam (12). The longitudinal steel sections (2) are laid horizontally at intervals, and both ends of the longitudinal steel sections (2) are fixed on the corresponding pedestal (a) or the cross beam (12). A plurality of transverse steel sections (3) are arranged above the longitudinal steel sections (2). The transverse steel sections (3) extend between the left and right pedestals (a) and are laid horizontally at intervals. Each of the longitudinal steel sections (2) and the transverse steel sections (3) is combined to form a skeleton platform (b). A full-height bracket (4) is laid on the skeleton platform (b). The height of the full-height bracket (4) matches the design height of the upper body (5) of the caisson.

2. The steel frame platform for caisson construction according to claim 1, Features: The transverse steel (3) and the longitudinal steel (2) are both I-beams.

3. The steel frame platform for caisson construction according to claim 1, Features: The transverse steel section (3) and the longitudinal steel section (2) are fixed at the contact point by spot welding.

4. The steel frame platform for caisson construction according to claim 1, Features: The ends of the longitudinal steel sections (2) or transverse steel sections (3) are fixed by 20 cm φ25 anchoring steel bars (6), the lower ends of the φ25 anchoring steel bars (6) are inserted into the corresponding pedestal (a) or cross beam (12), and the upper ends are passed through the corresponding longitudinal steel sections (2) or transverse steel sections (3).

5. The steel frame platform for caisson construction according to claim 1, Features: Each longitudinal steel section (2) between the front side support platform (a) and the cross beam (12), and each longitudinal steel section (2) between the rear side support platform (a) and the cross beam (12) are reinforced and connected by transversely extending connecting steel bars (7), and the connecting steel bars (7) and the longitudinal steel sections (2) are fixed at the contact point by full welding.

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