阅读说明：本技术 一种悬臂式塔吊基础结构及其施工方法 (Cantilever type tower crane foundation structure and construction method thereof ) 是由 梁磊磊 徐财进 王培� 刘英健 韩伦 孔聪 于 2019-08-01 设计创作，主要内容包括：本发明提供了一种悬臂式塔吊基础结构及其施工方法,本发明利用型钢作为悬臂牛腿结构,将塔吊安装位置由钢筋混凝土范围内延伸至钢筋混凝土范围之外,用以平衡塔吊传递至基础上的弯矩与剪力,解决塔吊基础平面位置受限且周边不满足独立基础设置的问题；利用预应力钢筋作为锚固结构主要受力构件,通过施加预拉力将型钢牛腿与承台之间实现摩擦型连接；采用钢筋混凝土结构作为保护结构,用以降低外力撞击型钢牛腿的影响和保护免受环境影响导致的腐蚀；该结构降低塔吊基础设置难度,在有限的工作条件下最大限度的减小塔吊基础构造尺寸,减小塔吊与附着物的间距、简化塔吊附墙结构,实用性强。(The invention provides a cantilever type tower crane foundation structure and a construction method thereof, wherein profile steel is used as a cantilever bracket structure, the installation position of a tower crane is extended from the reinforced concrete range to the outside of the reinforced concrete range so as to balance the bending moment and the shearing force transmitted to the foundation by the tower crane, and the problems that the plane position of the tower crane foundation is limited and the periphery of the tower crane foundation cannot meet the arrangement of an independent foundation are solved; the prestressed steel bars are used as main stressed components of the anchoring structure, and the structural steel corbel is connected with the bearing platform in a friction mode by exerting pretension; the reinforced concrete structure is used as a protection structure for reducing the influence of external force impacting the steel corbel and protecting the steel corbel from corrosion caused by environmental influence; this structure reduces the tower crane foundation and sets up the degree of difficulty, furthest's reduction tower crane foundation structure size under limited operating condition, reduces the interval of tower crane and attachment, simplifies the tower crane and attaches the wall structure, and the practicality is strong.)

1. The utility model provides a cantilever type tower crane foundation structure which characterized in that: the tower crane pre-buried foundation structure at least comprises a bearing platform (1), profile steel corbels (3) and a tower crane pre-buried foundation (5), wherein a plurality of pre-buried steel plates (2) are arranged on the side face of the bearing platform (1), the profile steel corbels (3) are provided with two groups, each group of profile steel corbels (3) independently bear two ground feet of the tower crane pre-buried foundation (5), one end of each group of profile steel corbels (3) is fixedly arranged on the bearing platform (1), the other end of each profile steel corbel (3) is arranged in a suspension mode, and one end, fixed on the bearing platform (1), of each profile steel corbel (3) adopts; the other end of the profile steel bracket (3) which is suspended in the air is connected with the embedded steel plate (2).

2. The cantilever tower crane foundation structure of claim 1, wherein: the profile steel bracket (3) is composed of a horizontal support and an inclined support and is welded with the embedded steel plate (2) into a whole.

3. The cantilever tower crane foundation structure of claim 2, wherein: one end of the horizontal support is fixedly arranged on the bearing platform (1), the other end of the horizontal support is suspended, and a plurality of vertical stiffening plates I (8) are arranged in the horizontal support; one end of the inclined support is connected with the suspended end of the horizontal support, the other end of the inclined support is connected with the embedded steel plate (2), and a stiffening plate II (9) is arranged at the joint of the horizontal support and the inclined support.

4. The cantilever tower crane foundation structure of claim 1, wherein: the embedded steel plate (2) comprises an embedded end (2.1) anchored in the bearing platform (1) and a connecting end (2.2) fixedly connected with the embedded end (2.1) and attached to the surface of the bearing platform (1); and the connecting end (2.2) is connected with the profile steel bracket (3) in a welding manner.

5. The cantilever tower crane foundation structure of claim 4, wherein: and a third stiffening plate (10) is arranged between the outer side of the profile steel bracket (3) and the connecting end (2.2) of the embedded steel plate (2).

6. The cantilever tower crane foundation structure of claim 1, wherein: cantilever type tower crane foundation structure still includes outsourcing concrete reinforcement (6), horizontal reinforcing bar (6.1), longitudinal reinforcement (6.2), outsourcing concrete reinforcement (6) include many horizontal reinforcing bar (6.1) and many longitudinal reinforcement (6.2), many horizontal reinforcing bar (6.1), many longitudinal reinforcement (6.2) are along shaped steel bracket (3) profile/crisscross arrangement all around, form the steel reinforcement skeleton that the cross-section is right trapezoid.

7. The cantilever tower crane foundation structure of claim 6, wherein: outsourcing concrete (7) have been pour in the framework of steel reinforcement, pre-buried steel sheet (2), shaped steel bracket (3) and prestressing steel (4) all wrap up in outsourcing concrete (7), tower crane pre-buried basis (5) imbed in outsourcing concrete (7) and its top exposes out in the top surface of outsourcing concrete (7).

8. The cantilever tower crane foundation structure of claim 1, wherein: each group of profile steel corbels (3) are fixed on the bearing platform (1) at least through 4 prestressed reinforcements (4).

9. The cantilever tower crane foundation structure of claim 1, wherein: and the tower crane embedded foundation (5) and the profile steel bracket (3) are connected by welding.

10. A construction method of a cantilever type tower crane foundation structure, which adopts the cantilever type tower crane foundation structure of any one of claims 1 to 7, is characterized by comprising the following steps:

Firstly, installing an embedded steel plate (2), prestressed reinforcements (4) and partial externally-wrapped concrete reinforcements (6) in the construction process of a bearing platform (1), processing a profile steel bracket (3), installing the profile steel bracket (3) after the construction of the bearing platform (1) is finished, welding the profile steel bracket (3) and the embedded steel plate (2), and temporarily fixing the profile steel bracket (3) and the prestressed reinforcements (4) by nuts;

Then installing a tower crane embedded foundation (5), welding the tower crane embedded foundation (5) and the section steel bracket (3) and applying prestress of the prestressed reinforcement (4);

And finally, installing the residual outer-coated concrete reinforcing steel bars (6) and pouring outer-coated concrete (7).

Technical Field

The invention relates to the field of tower crane installation construction, in particular to a cantilever type tower crane foundation structure suitable for areas above water and limited by environment and a construction method thereof.

background

The tower crane is the most common hoisting equipment in the construction site, also called tower crane, and is used for hoisting construction raw materials such as reinforcing steel bars, wood ridges, concrete, steel pipes and the like for construction. The tower crane is an indispensable device on a construction site.

in order to ensure the stability and safety of the tower crane, the tower crane is installed on a tower crane foundation, the tower crane foundation is usually formed by a large-size concrete bearing platform, the existing tower crane foundation is mostly manufactured on site in a construction site, the manufacturing period is long, the manufactured tower crane foundation can not be reused, the tower crane foundation needs to be dismounted after being used, a stud is difficult to dismount, and the safety problem is easy to exist. And can't directly install the tower crane foundation on the limited pier cushion cap in space at present, the tower crane foundation need set up in aquatic steel-pipe pile, steel cofferdam or enlarge on the basis, leads to the tower crane foundation when setting up, has following not enough:

1) Large-scale hoisting equipment is required to insert and pull the steel pipe piles in water beside the bearing platform, construction interference is large, a large number of steel pipe piles are required to be inserted and driven into soil, construction materials are large, in addition, when an independent steel pipe pile foundation is arranged, a tower crane can incline due to uneven settlement of the steel pipes, the safe use is influenced, and the independent foundation can cause the tower crane to be attached to a wall too long; when the tower crane is arranged on the bearing platform, excessive space is occupied;

2) The tower crane foundation arranged on the cofferdam is only suitable for the double-wall steel cofferdam, the cofferdam is required to be fixedly connected with the bearing platform, a cofferdam system cannot be dismantled before the tower crane is dismantled, the installation of an auxiliary structure of the bearing platform is influenced, and the construction period is long;

3) the enlarged foundation is only suitable for the land bridge with better geological condition, the foundation is composed of a large amount of reinforcing steel bars and concrete, the material consumption is large, the space outside the bridge is occupied, the construction land is increased, and the construction cost is increased.

Disclosure of Invention

the invention aims to provide a cantilever type tower crane foundation structure and a construction method thereof, and aims to solve the problems that the plane position of a tower crane foundation is limited and the periphery of the tower crane foundation does not meet the setting of an independent foundation; the second purpose is to reduce the difficulty of setting the tower crane foundation.

In order to solve the technical problem, the invention provides a cantilever type tower crane foundation structure which at least comprises a bearing platform, profile steel corbels and a tower crane embedded foundation, wherein a plurality of embedded steel plates are arranged on the side surface of the bearing platform, two groups of profile steel corbels are arranged, each group of profile steel corbels independently bear two ground feet of the tower crane embedded foundation, one end of each group of profile steel corbels is fixedly arranged on the bearing platform, the other end of each group of profile steel corbels is arranged in a suspended mode, and one end, fixed on the bearing platform, of each profile steel corbel adopts prestressed reinforcement back pressure; the other end of the profile steel bracket which is suspended in the air is connected with the embedded steel plate.

furthermore, the shaped steel bracket comprises a horizontal support and an inclined support, and is welded with the embedded steel plate into a whole.

Furthermore, one end of the horizontal support is fixedly arranged on the bearing platform, the other end of the horizontal support is suspended in the air, and a plurality of vertical stiffening plates I are arranged in the horizontal support; one end of the inclined support is connected with one suspended end of the horizontal support, the other end of the inclined support is connected with the embedded steel plate, and a second stiffening plate is arranged at the joint of the horizontal support and the inclined support.

furthermore, the embedded steel plate comprises an embedded end anchored in the bearing platform and a connecting end fixedly connected with the embedded end and attached to the surface of the bearing platform; and the connecting end is welded with the bracket of the profile steel.

Preferably, a third stiffening plate is arranged between the outer side of the profile steel bracket and the connecting end of the embedded steel plate.

Further, cantilever type tower crane foundation structure still includes the outsourcing concrete reinforcement, the outsourcing concrete reinforcement includes many transverse reinforcement and many longitudinal reinforcement, many transverse reinforcement, many longitudinal reinforcement along shaped steel bracket crisscross arrangement all around, form the steel skeleton that the cross-section is right trapezoid.

Furthermore, the outsourcing concrete has been pour in the framework of steel reinforcement, pre-buried steel sheet, shaped steel bracket and prestressing steel all wrap up in the outsourcing concrete, the pre-buried basis of tower crane imbeds in the outsourcing concrete and its top exposes out in the top surface of outsourcing concrete.

Preferably, each group of steel bracket is fixed on the bearing platform through at least 4 prestressed steel bars.

Furthermore, the tower crane embedded foundation and the profile steel bracket are connected by welding.

Further, the invention also provides a construction method of the cantilever type tower crane foundation structure, which comprises the following steps,

firstly, installing an embedded steel plate, prestressed reinforcements and partially-wrapped concrete reinforcements in the construction process of a bearing platform, processing a profile steel bracket, installing the profile steel bracket after the construction of the bearing platform is finished, welding the profile steel bracket and the embedded steel plate, and temporarily fixing the profile steel bracket and the prestressed reinforcements by nuts;

Then installing a tower crane embedded foundation, welding the tower crane embedded foundation and the profile steel bracket, and applying prestress of prestressed reinforcement;

And finally, installing the residual outer-coated concrete reinforcing steel bars and pouring outer-coated concrete.

The invention has the advantages that:

1. The invention utilizes the profile steel as a cantilever bearing bracket structure, extends the installation position of the tower crane from the reinforced concrete range to the outside of the reinforced concrete range, is used for balancing the bending moment and the shearing force transmitted to the foundation by the tower crane, and solves the problems that the plane position of the foundation of the tower crane is limited and the periphery of the foundation of the tower crane cannot meet the arrangement of an independent foundation; the prestressed steel bars are used as main stress members of the anchoring structure, and the structural steel corbels are connected with the top of the bearing platform in a friction mode by exerting pretension; the reinforced concrete structure is used as a protection structure for reducing the influence of external force impacting the steel corbel and protecting the steel corbel from corrosion caused by environmental influence; the tower crane foundation structure reduces the tower crane foundation arrangement difficulty, reduces the tower crane foundation structure size to the maximum extent under limited working conditions, reduces the distance between a tower crane and attachments, simplifies the tower crane wall attachment structure, and has strong practicability.

In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is an elevation view of a cantilevered tower crane substructure;

FIG. 2 is a plan view of a cantilevered tower crane substructure;

FIG. 3 is a vertical layout of the concrete outside the base structure of the cantilever tower crane.

Description of reference numerals:

1. A bearing platform; 2. pre-burying a steel plate; 2.1, embedding the end; 2.2, connecting ends; 3. a section steel corbel; 4. pre-stressing the steel bars; 5. pre-burying a foundation by a tower crane; 6. wrapping concrete reinforcing steel bars outside; 6.1, transverse reinforcing steel bars; 6.2, longitudinal steel bars; 7. concrete is coated outside; 8. a first stiffening plate; 9. a second stiffening plate; 10. and a third stiffening plate.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be noted that, in the present invention, the upper, lower, left, and right in the drawings are regarded as the upper, lower, left, and right of the cantilever tower crane foundation structure described in this specification.

The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.

Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.