Steel structure tower crane foundation on limited bearing surface

Abstract

The utility model discloses a steel structure tower crane foundation on a limited bearing surface. The steel structure tower crane foundation comprises a profile steel foundation, a steel corbel, a supporting column and a flange plate. The section steel foundation is of a rigid structure formed by welding a plurality of sections of H-shaped steel; the profile steel foundation is fixedly connected to the bearing face and horizontally extends out of the overhanging section so as to be connected with a supporting leg of the tower crane. The steel corbel is arranged at the joint of the cantilever section and the existing lower structure; the root of the steel corbel is fixedly connected to the side face of the existing lower structure, and the top of the steel corbel is fixedly connected to the bottom of the cantilever section. The supporting column is vertically arranged, the bottom of the supporting column is fixedly connected to a lower existing lower structure, and the top of the supporting column supports the cantilever section of the profile steel foundation. The bottom face of the flange plate is welded to the top of the profile steel foundation. A plurality of bolt holes are formed in the flange plate in the thickness direction so that the flange plate can be in bolt connection with supporting legs of the tower crane on the top face. Through the structural relation, the tower crane foundation flexibly adapts to an existing complex and narrow supporting structure, and stable supporting of a tower crane is achieved.

Description

Technical Field

[0001] This utility model relates to the field of installation technology for large lifting equipment, and in particular to a steel structure tower crane foundation on a limited support surface. Background Technology

[0002] Tower cranes are widely used in construction projects due to their superior vertical transportation capacity, large horizontal coverage, and high economic efficiency. As a core vertical transportation device in modern construction engineering, the foundation bearing capacity of tower cranes directly affects construction safety and efficiency. In complex construction projects, many sites face special conditions such as limited space, renovation of existing buildings, or constraints on the substructure. Traditional monolithic concrete foundations are difficult to implement due to the need for a certain width of support surface. In recent years, as many as 20% of projects have had to change their tower crane plans due to limited foundation conditions, directly causing delays and increased costs. To address this technical bottleneck, the engineering community has developed various solutions, such as composite foundations using "steel box girder + lattice column" structures, and support systems using pile foundations and pile caps for coordinated bearing, all of which have achieved considerable success in engineering practice. Currently, in the face of specific engineering realities, how to select a reasonable foundation structure system, how to ensure the reliability of the node connections of the selected structure, and how to achieve rapid on-site assembly and disassembly remain urgent technical problems to be solved. Utility Model Content

[0003] The main technical problem to be solved by this utility model is to provide a tower crane foundation that can flexibly adapt to the existing substructure and provide stable support for the tower crane on a limited support surface.

[0004] To solve the above-mentioned technical problems, this utility model provides a steel structure tower crane foundation on a limited support surface, including a steel foundation, steel brackets, support columns and flanges;

[0005] The steel foundation is a rigid structure welded from several sections of H-beams; the steel foundation is fixed to the supporting surface and extends horizontally outward to form a cantilever section to connect to the tower crane's outriggers;

[0006] The steel bracket is located at the junction of the cantilever section and the existing substructure; the root of the steel bracket is fixed to the side of the existing substructure, and the top is fixed to the bottom of the cantilever section.

[0007] The support column is set vertically; the bottom of the support column is fixed to the existing substructure which is lower than the support surface, and the top supports the cantilever section of the steel foundation.

[0008] The bottom surface of the flange is welded to the top of the steel foundation; the flange has several bolt holes along its thickness direction for bolting to the tower crane's legs on its top surface.

[0009] In a preferred embodiment, the steel foundation is a grid-shaped structure constructed by welding two first steel sections and two second steel sections perpendicularly to each other.

[0010] The two second steel sections are welded parallel to each other on the support surface; the two first steel sections are welded to the support surface along the vertical direction of the second steel sections and extend horizontally out of the cantilever section.

[0011] In a preferred embodiment, at the connection with the tower crane outrigger, the first steel section is provided with a first stiffening plate in the height direction.

[0012] In a preferred embodiment, the first steel section is composed of two H-beams joined together.

[0013] In a preferred embodiment, the steel bracket is welded from several steel plates, including a second web plate and a second stiffening plate; the root of the second web plate is welded to the side of the existing substructure, and the top is welded to the bottom of the cantilever section; the second stiffening plate is vertically welded to the second web plate, and the top is welded to the bottom of the cantilever section.

[0014] In a preferred embodiment, the second web is vertically aligned with the first web of the cantilevered section of the steel foundation.

[0015] In a preferred embodiment, a plurality of connecting plates are vertically welded to the bottom surface of the flange; the side of the connecting plates facing away from the flange is welded to the top of the steel foundation.

[0016] In a preferred embodiment, the flange is symmetrically welded to the cantilever section of the steel foundation with respect to the support surface.

[0017] In a preferred embodiment, the bottom of the support column is welded to an embedded plate, which is anchored within the existing structure below.

[0018] In a preferred embodiment, the support column is made of round steel pipe.

[0019] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0020] The tower crane foundation provided by this utility model supports the wider-spaced tower crane legs by welding and cantilevering a grid-shaped steel foundation onto a limited support surface. Furthermore, a section of the first steel section extends and is supported by the support columns on a lower substructure, transforming the cantilever into end-to-end support, thus giving the tower crane foundation a higher load-bearing capacity and operational stability. In summary, through the above structural relationships, the tower crane foundation flexibly adapts to complex and narrow existing support structures, achieving stable support for the tower crane. Therefore, the tower crane foundation has wide engineering applicability.

[0021] The tower crane foundation uses flanges to fix the tower crane legs, enabling a detachable connection between the tower crane legs and the foundation, and allowing for flexible vertical adjustment of the tower crane legs during installation. The various components of the tower crane foundation can be prefabricated in the workshop, and on-site assembly can be completed simply by welding the components together, simplifying the operation, shortening the construction period, and improving construction efficiency. Furthermore, thanks to the tower crane foundation, construction workers do not need to pour large-volume concrete foundations on-site, reducing pollution to the construction site and achieving environmental friendliness. Attached Figure Description

[0022] Figure 1 This is a top view of the tower crane foundation described in this embodiment of the utility model;

[0023] Figure 2 This is a schematic elevation view of the tower crane foundation described in this embodiment of the utility model. Figure 1 (Along the direction of the second steel section);

[0024] Figure 3 This is a schematic elevation view of the tower crane foundation described in this embodiment of the utility model. Figure 2 (Along the direction of the first steel section);

[0025] Figure 4 This is a schematic diagram of an alternative arrangement of the flange in an embodiment of this utility model.

[0026] The markings in the diagram are as follows: 1-steel foundation, 11-first steel section, 110-cantilever section, 111-first web, 112-first stiffening plate, 12-second steel section, 2-steel corbel, 21-second web, 22-second stiffening plate, 3-support column, 31-embedded plate, 4-flange, 41-connecting plate, 42-bolt hole, 5-existing lower structure, 51-support surface. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] like Figures 1-4 As shown, this utility model embodiment provides a steel structure tower crane foundation on a limited support surface, including a steel foundation 1, a steel bracket 2, a support column 3, and a flange 4.

[0031] like Figure 1 As shown, the steel foundation 1 is a rigid structure welded from several H-beams. Specifically, the steel foundation 1 includes two first steel sections 11 and two second steel sections 12. The two first steel sections 11 are arranged in parallel, and the two second steel sections 12 are welded perpendicularly to the first steel sections 11, forming a grid-like structure of the steel foundation 1. This grid-like structure ensures that both the first steel sections 11 and the second steel sections 12 have high lateral stiffness, guaranteeing stability under stress.

[0032] Due to the limited support surface 51 of the existing lower structure 5, the four legs of the tower crane cannot all rest on the support surface 51. To solve this problem, the center distance between the two second steel sections 12 is no greater than the width of the support surface 51, so that they are welded into the support surface 51. The first steel section 11 extends horizontally outward from the vertical direction of the second steel section 12 to form a cantilever section 110 to support the four legs of the tower crane. In this embodiment, considering that the tower crane legs all rest on the first steel section 11, the bearing capacity requirement of the first steel section 11 is high. Therefore, the first steel section 11 has the following structural characteristics: (1) Preferably, the center distance between the two first steel sections 11 is equal to the center distance between the two legs of the tower crane to avoid the first steel section 11 being eccentrically compressed, so as to improve the bearing limit. (2) Preferably, at the connection with the tower crane legs, the first steel section 11 is provided with a first stiffening plate 112 in the height direction. The first stiffening plate 112 is perpendicularly welded to the upper and lower flanges and the first web plate 111 of the first steel section 11. (3) In cross-section, the first steel section 11 is composed of two HM588 steel sections joined together. The second steel section 12 is a single HM588 steel section. The "jointed together" is a common technology in this technical field and will not be described in detail here. (4) In the extension direction, when welding the steel section foundation 1, the first steel section 11 is a whole H-beam, and the second steel section 12 is a single H-beam cut into several sections for welding purposes.

[0033] Because the tower crane's outriggers rest on the cantilevered section 110 of the first steel section 11, the bending moment generated by the first steel section 11 is relatively large. To improve the load-bearing capacity, such as... Figure 2 As shown, the steel bracket 2 is welded at the junction of the cantilever section 110 and the lower existing structure 5. The steel bracket 2 is welded from several steel plates, including several webs and a second stiffening plate 22. For clarity, the web of the steel bracket 2 is referred to as the second web 21, and the web of the first steel section 11 is referred to as the first web 111. The root of the second web 21 is vertically welded to the side of the lower existing structure 5, and the top is welded to the bottom of the cantilever section 110 along the length of the first steel section 11. The second stiffening plate 22 is vertically welded to the second web 21, and the top is also welded to the bottom of the cantilever section 110 to improve the lateral stiffness of the steel bracket 2. Preferably, the second web 21 and the first web 111 of the first steel section 11 are vertically aligned; the second stiffening rib and the first stiffening plate 112 of the first steel section 11 are vertically aligned.

[0034] In this embodiment, the steel foundation 1 is welded to a narrow support surface 51, and the tower crane is located at the cantilevered portion of the steel foundation 1. When the tower crane is raised, the load-bearing capacity requirement of the tower crane foundation increases. At this time, relying solely on the aforementioned support system is insufficient to meet the normal operation of the tower crane. Therefore, as... Figure 2 As shown, the tower crane foundation is further provided with the support column 3 to reinforce the above support system. The support column 3 is vertically arranged, with the bottom fixed to the lower existing structure 5 which is lower than the support surface 51, and the top supporting the cantilever section 110 of the first section steel 11. In this embodiment, the top of the support column 3 is welded to the bottom of the cantilever section 110. In actual engineering, the installation position of the support column 3 depends on specific circumstances. However, it is necessary that the positioning of the support column 3 should fall within the vertical projection of the cantilever section 110 of the first section steel 11 to support the first section steel 11. In this embodiment, the support column 3 is a circular steel pipe with an outer diameter of 630 mm and a wall thickness of 10 mm. There are various fixing methods for the support column 3 and the partial structure. In this embodiment, the lower part of the support column 3 is a concrete structure. A horizontal embedded plate 31 is anchored in the concrete structure by a number of anchor bars, and the bottom of the support column 3 is welded to the embedded plate 31 to achieve fixation. The setting of the embedded plate 31 is a common engineering technique and will not be elaborated herein. If the lower part of the support column 3 is a steel structure, the bottom of the support column 3 is welded to the lower existing structure 5, and stiffening plates are welded along the outer periphery of the column foot, which can also achieve fixation. In this embodiment, due to conditions, the support column 3 is only arranged on one side of the first section steel 11, forming an asymmetric spatial relationship with the steel bracket 2, and this solution flexibly adapts to the existing lower existing structure 5.

[0035] In this embodiment, bolt holes 42 are provided in the upper tower crane leg, so the tower crane foundation is provided with a flange 4 to fix the leg. As Figure 1 shown, a number of connecting plates 41 are vertically welded to the bottom surface of the flange 4, and the side of the connecting plate 41 facing away from the flange 4 is welded to the top of the first section steel 11, thereby fixing the flange 4 to the section steel foundation 1. Preferably, in this embodiment, the number of connecting plates 41 is arranged in a "cross" shape centered on the center of the flange 4. The flange 4 is provided with a number of bolt holes 42 along the thickness direction. Through the bolt holes 42, the flange 4 is bolt-connected to the leg of the tower crane standard section on the top surface. Another function of the bolt connection between the flange 4 and the leg of the tower crane is that the stonemasons can adjust the verticality of the tower crane by screwing the bolts. During installation, the tower crane standard section together with the flange 4 is placed on the first section steel 11, and after calibrating the verticality of the tower crane standard section, the number of connecting plates 41 is welded to the upper flange of the first section steel 11. In this embodiment, the four flanges 4 are symmetrically welded to the cantilever section 110 of the first section steel 11 with respect to the support surface 51 or the two second section steels 12. As Figure 4As shown, in other embodiments, two flanges 4 can also be welded to the portion of the first steel section 11 located within the support surface 51, and the other two flanges 4 can be welded to the cantilevered section 110 of the first steel section 11 facing the support column 3. This arrangement places stricter requirements on the load-bearing capacity of the support column 3. In other practical engineering projects, if the tower crane's outriggers are not bolted, their bottoms can be welded to the upper flange of the first steel section 11 to secure the tower crane. However, this connection requires additional equipment to adjust the verticality of the tower crane's standard sections.

[0036] The tower crane foundation provided in this embodiment of the invention supports the wider-spaced tower crane legs by welding and cantilevering a grid-shaped steel foundation 1 onto a limited support surface 51. Furthermore, the first steel section 11 extends a section and is supported by the support column 3 on the lower existing structure 5, transforming the cantilever into a two-end support, thus giving the tower crane foundation a higher load-bearing capacity and operational stability. In summary, the tower crane foundation, through the above structural relationships, flexibly adapts to complex and narrow existing support structures, achieving stable support for the tower crane. Therefore, the tower crane foundation has wide engineering applicability. The tower crane foundation uses flanges 4 to fix the tower crane legs, not only enabling a detachable connection between the tower crane legs and the foundation but also allowing for flexible vertical adjustment of the tower crane legs during installation. The various components of the tower crane foundation can be prefabricated in the workshop, and on-site assembly can be completed simply by welding the components, simplifying the operation, shortening the construction period, and improving construction efficiency. Furthermore, relying on the tower crane foundation, construction workers do not need to pour large-volume concrete foundations on site, reducing pollution to the construction site and achieving environmental friendliness.

[0037] The above description is merely a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All technically equivalent modifications made based on the content of the present utility model specification shall fall within the protection scope of the present utility model.

Claims

1. A steel tower crane foundation on a finite support surface, characterized in that: This includes steel foundations, steel brackets, support columns, and flanges; The steel foundation is a rigid structure welded from several sections of H-beams; the steel foundation is fixed to the supporting surface and extends horizontally outward to form a cantilever section to connect to the tower crane's outriggers; The steel bracket is located at the junction of the cantilever section and the existing substructure; the root of the steel bracket is fixed to the side of the existing substructure, and the top is fixed to the bottom of the cantilever section. The support column is set vertically; the bottom of the support column is fixed to the existing substructure which is lower than the support surface, and the top supports the cantilever section of the steel foundation. The bottom surface of the flange is welded to the top of the steel foundation; the flange has several bolt holes along its thickness direction for bolting to the tower crane's legs on its top surface.

2. The steel structure tower crane foundation on a limited support surface according to claim 1, characterized in that: The steel foundation is a grid-shaped structure constructed by welding two first-section steels and two second-section steels perpendicularly to each other. The two second steel sections are welded parallel to each other on the support surface; the two first steel sections are welded to the support surface along the vertical direction of the second steel sections and extend horizontally out of the cantilever section.

3. A steel tower crane foundation on a limited support surface according to claim 2, characterized in that: At the connection point with the tower crane outriggers, the first steel section is provided with a first stiffening plate in the height direction.

4. A steel tower crane foundation on a limited support surface according to claim 2, characterized in that: The first type of steel is composed of two H-beams joined together.

5. A steel tower crane foundation on a limited support surface according to claim 1, characterized in that: The steel bracket is welded from several steel plates, including a second web plate and a second stiffening plate; the root of the second web plate is welded to the side of the existing substructure, and the top is welded to the bottom of the cantilever section; the second stiffening plate is welded vertically to the second web plate, and the top is welded to the bottom of the cantilever section.

6. A steel tower crane foundation on a limited support surface according to claim 5, characterized in that: The second web is vertically aligned with the first web of the cantilevered section of the steel foundation.

7. A steel tower crane foundation on a limited support surface according to claim 1, characterized in that: The flange has several connecting plates vertically welded to its bottom surface; the side of the connecting plates facing away from the flange is welded to the top of the steel foundation.

8. A steel tower crane foundation on a limited support surface according to claim 1, characterized in that: The flange is symmetrically welded to the cantilever section of the steel foundation with respect to the support surface.

9. A steel tower crane foundation on a limited support surface according to claim 1, characterized in that: The bottom of the support column is welded to an embedded plate, which is anchored within the existing structure below.

10. A steel tower crane foundation on a limited support surface according to claim 1, characterized in that: The support column is made of round steel pipe.

Images