CN202081426U - Tower crane foundation - Google Patents

Abstract

The utility model discloses a tower crane foundation, which comprises a plurality of steel casings, the plurality of steel casings are connected as a whole through a plurality of parallel pipes, and one of the steel casings in the plurality of steel casings is The barrel is a tower crane steel casing, and concrete is poured into the tower crane steel casing. With the above-mentioned structure, the utility model has the following advantages: 1. A plurality of steel casings are connected through a plurality of parallel pipes to form a stable construction platform. The steel casing of the tower crane is used as the vertical stress member of the tower crane foundation. The structure avoids another construction platform, which can reduce costs and shorten the construction period; 2. The force of the cross beam structure is clear, the force transmission is reliable, and it is convenient for construction.

Description

a tower crane foundation

technical field

The utility model relates to a tower crane foundation.

Background technique

Due to the influence of sea tides, wind waves and typhoons, at present, the offshore tower crane foundation of the cross-sea bridge adopts two structural forms. One is to use steel pipe piles or PHC piles (prestressed high-strength concrete) The offshore platform form; the other is the mobile construction platform.

For the first form: in the vicinity of the steel casing at the construction pier, considering the limitation of the distance between the piles and the hoisting amplitude and lifting weight of the tower crane, the steel pipe pile is used as the foundation and welded with section steel and steel plate. The temporary space bent frame structure with longitudinal and transverse rigidity, and then install the tower crane on the platform. The foundation of the tower crane mostly adopts the form of a well-shaped beam composed of double H-shaped steel.

For the second form: connect and fix the two main girders horizontally on the constructed platform to form a stable construction platform, so that the whole set of equipment can move from one working surface to the next working surface by itself, avoiding frequent use of equipment Installation and removal.

The above two types of tower crane foundations both use steel platforms to convert offshore construction into land construction, but each pier needs to be erected and dismantled separately. The platform uses a large amount of steel, the construction period is long, the construction efficiency is low, and the cost is high. For the second type of structure, although the maneuverability and flexibility of the tower crane are enhanced, longitudinal main girders and tracks need to be laid, which increases the construction cost.

Utility model content

The technical problem to be solved by the utility model is to provide a tower crane foundation which avoids setting up another construction platform, reduces costs and shortens the construction period in view of the deficiencies in the prior art.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: a tower crane foundation, including a plurality of steel casings, the plurality of steel casings are connected as a whole through a plurality of parallel pipes, and the plurality of One of the steel casings is a tower crane steel casing, and concrete is poured into the tower crane steel casing.

The steel casing of the tower crane is provided with radial support pipes.

The top of the tower crane steel casing is provided with a cross beam.

Stiffening plates are provided at the intersection of the two beams of the cross beam, and transverse and longitudinal stiffening plates are respectively provided at the connection between the cross beam and the steel casing of the tower crane.

The utility model adopts the above-mentioned structure and has the following advantages: 1. A plurality of steel casings are connected through a plurality of parallel pipes to form a stable construction platform. The steel casing of the tower crane is used as the vertical force-bearing member of the tower crane foundation. The structure avoids another construction platform, which can reduce costs and shorten the construction period; 2. The cross-beam structure has clear force, reliable force transmission, and is convenient for construction.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail;

Fig. 1 is the top view structural representation of the utility model;

Fig. 2 is the side view structural representation of the utility model;

Fig. 3 is the structural representation of tower crane steel casing in the utility model;

Fig. 4 is a structural schematic diagram of the cross beam and the stiffening plate connected to the top of the steel casing of the tower crane in the utility model;

Fig. 5 is the structural representation of support pipe in the utility model;

In Fig. 1 to Fig. 5, 1, parallel pipe; 2, tower crane steel casing; 3, support pipe; 4, cross beam; 5, stiffening plate.

Detailed ways

As shown in Figures 1 to 5, a tower crane foundation includes multiple steel casings, which are connected as a whole through multiple parallel pipes 1, and one of the multiple steel casings is The tower crane steel casing 2 is filled with concrete. A radial support pipe 3 is arranged inside the tower crane steel casing 2 . The top of the tower crane steel casing 2 is provided with a cross beam 4 . A stiffening plate 5 is provided at the intersection of the two beams of the cross beam 4 , and transverse and longitudinal stiffening plates 5 are respectively provided at the junction of the cross beam 4 and the steel casing 2 of the tower crane. After the poured concrete tower crane steel casing 2 is removed, it becomes a pile foundation under the cap.

In the case of overcoming the harsh sea conditions in the open sea, there is no need to build another construction platform, which greatly saves the construction period and steel consumption. The structure is novel, the stress is reasonable, and the bearing capacity of the existing steel casing can be fully utilized. The welding installation of the tower crane foundation cover plate and rib plate part adopts both water construction and land construction at the same time, which improves the construction efficiency.

The erection of the foundation of the tower crane relies on the existing steel casing first, and uses the parallel connection system to connect and fix the two steel casings horizontally to form a stable construction platform, and then select a steel casing on this platform as the tower crane For the vertical stress-bearing components of the foundation, the selected tower crane steel casing 2 needs to comprehensively consider the overall stability of the tower crane working surface and the platform, use the floating crane to lift the steel cage into the tower crane steel casing 2, and then place it inside the casing Pour C40 concrete to the level of the cap bottom. Then install components such as the cross beam 4, the stiffening plate 5 and the cover plate on the top of the tower crane steel casing 2, and finally install the tower crane system. After the concrete in the casing under the tower crane foundation is poured, the casing inner support pipe 3 and the stiffening plate 5 are welded on the steel casing, and the cross beam 4 and its web transverse stiffening plate are welded on land at the same time. Use floating crane or other small hoisting equipment to lift the cross beam 4 to the reserved groove on the top of the steel casing corresponding to the tower crane foundation, weld the contact part between the cross beam 4 and the steel casing, and add welding stiffeners . Install the tower crane on the cross beam 4, and the tower crane support must be strictly aligned with the center line paper of the cross beam.

The foundation of the new type of tower crane relies on the existing steel casing, and rationally utilizes the vertical bearing capacity of the steel casing; the horizontal parallel pipe is used as a link to form a strong lateral force-resistant system. Through the overall planning of the construction process, there is no need to build other construction platforms, which greatly saves costs and greatly speeds up the construction progress. The overall concept is novel, ingenious and practical.

The stress of the steel casing is complex, and the diameter and thickness of the steel casing is relatively large (60<D/t=166.7<300), which is a structure that is very sensitive to welding residual stress and initial defects. In this case, the pipe wall is prone to local buckling and overall instability. The connection between the cross beam and the casing is adopted, which greatly enhances the overall performance of the top of the casing and prevents the out-of-plane buckling of the top steel casing wall. .

The use of cross beams and stiffeners as the main force-bearing members greatly increases the overall rigidity of the top of the steel casing and the web stiffeners at the tower crane support greatly increase the area moment of the web under the same material. , and increased the ability of the upper flange of the beam to resist the vertical concentrated load, so that the shear bearing capacity and the punching shear bearing capacity of the material have been greatly improved, and the concentrated stress on the top of the steel casing is passed through the stiffener to reduce the load. It is transmitted to the steel casing in a uniform manner, which reduces the stress concentration, prevents the local instability of the steel casing wall, and enhances the bearing capacity of the steel casing itself.

For the part of the cross stiffened beam that is in direct contact with the foundation of the tower crane, due to the high quality requirements of the weld seam, land welding is used to ensure the welding quality; for other components, welding can be directly performed on the steel casing, both on water and on land. Simultaneous welding greatly speeds up the progress of the project.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above methods, as long as the various improvements of the technical solution of the utility model are adopted, or directly applied to other applications without improvement. Occasions, all within the protection scope of the present utility model.

Claims (4)

1. tower crane, comprise many steel casings, it is characterized in that: connect as one by many Gen Pinglian pipes (1) between the described many steel casings, the wherein steel casing in the described many steel casings is a tower crane steel casing (2), is perfused with concrete in the described tower crane steel casing (2).

2. a kind of tower crane according to claim 1 is characterized in that: be provided with stay pipe (3) radially in the described tower crane steel casing (2).

3. a kind of tower crane according to claim 1 is characterized in that: described tower crane steel casing (2) top is provided with rood beam (4).

4. a kind of tower crane according to claim 3, it is characterized in that: the infall of two beams of described rood beam (4) is provided with stiffener (5), and the junction of described rood beam (4) and tower crane steel casing (2) is respectively equipped with laterally and stiffener (5) longitudinally.

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