Tower crane foundation for assembly construction

Abstract

The utility model discloses a tower crane foundation for assembly construction. The tower crane foundation solves the problems that an existing assembly type tower crane foundation is poor in construction convenience and single in structure. The tower crane foundation for assembly construction comprises a cast-in-place pile, a raft plate, secondary concrete, a central precast block and balancing weights, and is characterized in that the central precast block is of an octagonal prism structure, the eight balancing weights are evenly arranged on the periphery of the central precast block in a central radial shape, the central precast block is fixedly connected with the balancing weights, and the balancing weights are arranged on the periphery of the central precast block. A round through hole is formed in at least one balancing weight, a reserved steel bar of a pile head of the cast-in-place pile is inserted into the round through hole, and concrete is poured into the round through hole to form fixed connection. A raft is arranged below the central precast block and the balancing weight, and secondary concrete is arranged above the central precast block and the balancing weight. According to the tower crane foundation, the operation mode of prefabricating the modules and secondary concrete pouring is adopted for rapid construction, and the construction speed is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of tower crane foundation construction. Background Art

[0002] The construction of tower crane foundation includes earth excavation, concrete pouring, earth backfilling and other steps. The concrete pouring is generally a cast-in-place process with a long construction period.

[0003] Prefabricated installation refers to a method of transforming the corresponding cast-in-place concrete pouring construction into prefabricated modules, and carrying out construction through hoisting and mechanical connection or grouting connection. This method has the advantage of high efficiency.

[0004] For example, CN220150367U discloses an assembled tower crane foundation suitable for different models, including a central foundation block with embedded sections of tower cranes of different models, side foundation blocks are provided on the four sides of the central foundation block, the central foundation block and the side foundation blocks are tensioned and fixed by prestressed tendons with the help of prestressed tensioners, corner foundation blocks are provided at the four corners of the central foundation block, and each corner foundation block is detachably connected to the side foundation blocks adjacent to its two sides by bolt fastening connectors. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a tower crane foundation for assembly construction, which solves the problems of poor construction convenience and single structure of the existing assembled tower crane foundation.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The tower crane foundation for assembly construction includes cast-in-place piles, raft slabs, secondary concrete, central prefabricated blocks and counterweight blocks, and is characterized in that the central prefabricated block is an octagonal column structure, and eight counterweight blocks are evenly arranged in a central radial shape on the periphery of the central prefabricated block, the central prefabricated block and the counterweight block are fixedly connected, at least one of the counterweight blocks is provided with a circular through hole, the reserved steel bars of the pile head of the cast-in-place pile are inserted into the circular through hole and concrete is poured in the circular through hole to form a fixed connection; the central prefabricated block and the counterweight block are provided with a raft slab below and secondary concrete above.

[0008] Furthermore, the counterweight block has a fan-shaped profile and cooperates with the central prefabricated block through a flat surface or an arc surface.

[0009] Furthermore, the counterweight block and the central prefabricated module are provided with steel cable channels, and the steel cables pass through the steel cable channels and are tensioned and fixed.

[0010] Furthermore, there are four cast-in-place piles arranged in a square shape, and the distance between them is set to 2 meters.

[0011] Furthermore, a tower crane base is installed on the central prefabricated block, and the installation method is to fix it with high-strength bolts and embedded bolts to form an integral body after fixing.

[0012] Furthermore, a lifting buckle is provided on the counterweight block.

[0013] Furthermore, the central prefabricated block and the counterweight block are designed to have the same thickness.

[0014] The beneficial effect of the utility model is that the tower crane foundation adopts the operation mode of prefabricated modules and secondary concrete pouring for rapid construction, which improves the construction speed. The prefabricated modules are tensioned and connected by steel cables before, so that they can quickly form a whole. The steel cables have higher tensile resistance and can meet the requirements of the tower crane foundation for tensile resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model.

[0016] Figure 2 This is a top view.

[0017] Figure 3 It is a horizontal cross-section diagram.

[0018] Figure 4 It is the construction vertical section of the utility model.

[0019] Figure 5 A three-dimensional view of the central prefabricated module.

[0020] Figure 6 A three-dimensional diagram of the counterweight.

[0021] In the figure:

[0022] 10 cast-in-place piles,

[0023] 20 rafts,

[0024] 30 secondary concrete,

[0025] 40 center prefabricated blocks,

[0026] 50 counterweight block, 51 round through hole, 52 lifting buckle,

[0027] 60 tower crane base,

[0028] 70 steel cables. DETAILED DESCRIPTION

[0029] refer to Figures 1 to 6The tower crane foundation includes a cast-in-place pile 10, a raft 20, secondary concrete 30, a central prefabricated block 40 and a counterweight 50. The central prefabricated block 50 is an octagonal prism structure, which is also a module for installing the tower crane base, and is used to provide an installation point for the tower crane. The counterweight 50 has a fan-shaped profile and is eight in number. The eight counterweights are evenly docked on the eight prism surfaces of the central prefabricated block and are arranged radially around the periphery of the central prefabricated block. Four of the counterweights 50 are provided with circular through holes 51, which are used to be plugged and connected with the pile head of the cast-in-place pile, that is, the reserved steel bars of the pile head of the cast-in-place pile 10 are inserted into the circular through holes, and concrete is poured in the circular through holes. After the concrete solidifies, a fixed connection is formed between the two, so that the cast-in-place pile and the counterweight form an integrated structure with anti-pulling performance in three-dimensional space.

[0030] The counterweight block 50 is provided with a cable channel, and the corresponding central prefabricated module 40 has an octagonal prism through hole in the center, corresponding to the eight prism surfaces on the outside. The central prefabricated module is also provided with a cable channel, and the counterweight block and the central prefabricated module are tightly fitted and fastened together by the post-tensioning method of the cable 70.

[0031] A lifting buckle 52 is provided on each counterweight block 50 for installation of a lifting device, so that rapid lifting can be achieved.

[0032] The above-mentioned central prefabricated block and the counterweight block are designed with equal thickness.

[0033] The construction process of the tower crane foundation is as follows:

[0034] The first step is to construct the bored piles 10. The bored piles are constructed at accurate positions according to the marked lines. Four bored piles 10 are formed through the construction. The four bored piles are arranged in a square and the spacing is set to 2 meters.

[0035] The second step is to excavate the foundation pit. The earthwork within the scope of the tower crane foundation pedestal in the foundation pit is excavated in layers according to the slope of 1:1. The earthwork is transported as it is excavated. After the earthwork is excavated to the bottom of the tower crane foundation pedestal cushion layer, the tower crane foundation cushion layer and the pile heads of the cast-in-place piles are chiseled out. If necessary, 80 thick C20 fine stone concrete is sprayed on the excavated slope to reinforce the slope to prevent the soil from sliding or collapsing. The steel mesh and steel mesh cage are laid on the foundation pit, and the concrete is spread to form a raft 20. The raft foundation is leveled, and after curing and hardening, it forms an installation platform for the central prefabricated block and the counterweight block.

[0036] The third step is the installation of the central prefabricated block 40 and the counterweight. In this process, firstly, white paint is used to mark the raft 20, and the installation points of the central prefabricated block and the counterweight are accurately determined by marking. Then, the central prefabricated block is hoisted and accurately placed at the installation point with the crane, and then the eight counterweights are carefully hoisted to the raft, and the steel cable 70 is used to pass through the steel cable channel in the counterweight and the central prefabricated block from the outside to the inside, and the ends of both ends are locked, and the locking is formed into one. After this process, the central prefabricated block and the eight counterweights form an integrated structure, which is a disc-shaped structure with a large enough bearing area. In the above process, it is ensured that the four cast-in-place piles 10 correspond to the corresponding four counterweights 50, that is, it is ensured that the pile head of the cast-in-place pile is reserved to be inserted into the circular through hole, and then the circular through hole is poured with concrete, and after the concrete solidifies, a fixed connection is formed between the two, so that the cast-in-place pile and the counterweight form an integrated structure, and curing is hardened.

[0037] The fourth step is to install the tower crane base 60 on the central prefabricated block by fixing it with high-strength bolts and embedded bolts to form an integral body after fixing.

[0038] The fifth step is to pour concrete in the foundation pit for the second time. The pouring of the secondary concrete 30 should control the position and elevation of the tower crane foundation, that is, meet the elevation requirements for the tower crane foundation in the construction drawings. Only when the strength of the secondary concrete 30 reaches 100%, the installation of the upper tower crane segment of the tower crane foundation section can be carried out to complete a cycle.

[0039] The embodiments described above are merely descriptions of preferred implementations of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements to the present invention by relevant technical personnel in the field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. The tower crane foundation of assembly construction includes cast-in-place piles, raft slabs, secondary concrete, central prefabricated blocks and counterweight blocks, which are characterized by: The central prefabricated block is an octagonal column structure, and eight counterweight blocks are evenly arranged in a central radial shape on the periphery of the central prefabricated block. The central prefabricated block and the counterweight block are fixedly connected, and at least one of the counterweight blocks is provided with a circular through hole. The reserved steel bars of the pile head of the cast-in-place pile are inserted into the circular through hole and concrete is poured in the circular through hole to form a fixed connection; the central prefabricated block and the counterweight block are provided with a raft slab below and secondary concrete above.

2. The tower crane foundation for assembly construction according to claim 1, characterized in that: The counterweight block has a sector-shaped profile and is matched with the central prefabricated block via a flat surface or an arc surface.

3. The tower crane foundation for assembly construction according to claim 1, characterized in that: The counterweight block and the central prefabricated module are provided with steel cable channels, through which the steel cables pass and are tensioned and fixed.

4. The tower crane foundation for assembly construction according to claim 1, characterized in that: There are four cast-in-place piles arranged in a square shape, and the distance between them is set to 2 meters.

5. The tower crane foundation for assembly construction according to claim 1, characterized in that: The tower crane base is installed on the central prefabricated block, and the installation method is to fix it with high-strength bolts and embedded bolts, and form an integral body after being fixed.

6. The tower crane foundation for assembly construction according to claim 1, characterized in that: The counterweight block is provided with a lifting buckle.

7. The tower crane foundation for assembly construction according to claim 1, characterized in that: The central prefabricated block and the counterweight block are designed to have the same thickness.

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