CN110565676A - Cantilever type tower crane foundation structure and construction method thereof - Google Patents
Cantilever type tower crane foundation structure and construction method thereof Download PDFInfo
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- CN110565676A CN110565676A CN201910707100.0A CN201910707100A CN110565676A CN 110565676 A CN110565676 A CN 110565676A CN 201910707100 A CN201910707100 A CN 201910707100A CN 110565676 A CN110565676 A CN 110565676A
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- 238000010276 construction Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 140
- 239000010959 steel Substances 0.000 claims abstract description 140
- 230000002787 reinforcement Effects 0.000 claims description 40
- 239000004567 concrete Substances 0.000 claims description 36
- 238000012946 outsourcing Methods 0.000 claims description 18
- 238000003466 welding Methods 0.000 claims description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims 3
- 239000000725 suspension Substances 0.000 claims 1
- 239000011150 reinforced concrete Substances 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 6
- 229910000746 Structural steel Inorganic materials 0.000 abstract description 3
- 238000004873 anchoring Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000003116 impacting effect Effects 0.000 abstract description 3
- 238000010008 shearing Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004035 construction material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
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.
Description
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.
implementation mode one
The cantilever type tower crane foundation structure provided by the invention at least comprises a bearing platform 1, a profile steel corbel 3 and a tower crane embedded foundation 5, wherein a plurality of embedded steel plates 2 are arranged on the side surface of the bearing platform 1, two groups of profile steel corbels 3 are arranged, each group of profile steel corbels 3 independently bear two ground feet of the tower crane embedded 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 suspended manner, and one end, fixed on the bearing platform 1, of each profile steel corbel 3 is subjected to back pressure by adopting a prestressed reinforcement 4; the other end of the section steel bracket 3 in the air is connected with the embedded steel plate 2.
The cantilever bracket structure of the tower crane has the advantages that the structural steel is used as the cantilever bracket structure, the installation position of the tower crane extends from the reinforced concrete range to the outside of the reinforced concrete range, the bending moment and the shearing force transmitted to the foundation by the tower crane are balanced, and 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 setting of an independent foundation are solved.
Second embodiment
The second embodiment of the invention relates to a cantilever type tower crane foundation structure, which comprises a bearing platform 1, a profile steel corbel 3 and a tower crane embedded foundation 5, wherein a plurality of embedded steel plates 2 are arranged on the side surface of the bearing platform 1, two groups of profile steel corbels 3 are arranged, each group of profile steel corbels 3 independently bear two ground feet of the tower crane embedded foundation 5, furthermore, each profile steel corbel 3 consists of a horizontal support and an inclined support and is welded with the embedded steel plates 2 into a whole, preferably, one end of the horizontal support is fixedly arranged on the bearing platform 1 and adopts prestressed reinforcement 4 to realize back pressure; the other end of the horizontal support is suspended in the air, and a plurality of vertical stiffening plates I8 are arranged inside 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 2, and a second stiffening plate 9 is arranged at the joint of the horizontal support and the inclined support.
Further, 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 section steel bracket 3 in a welding manner.
adopt pre-buried steel sheet anchor in the cushion cap, for the shaped steel bracket provides solid adhering to the basis, further, be provided with three 10 stiffening plates between the outside of shaped steel bracket 3 and the link 2.2 of pre-buried steel sheet 2 to make the connection between pre-buried steel sheet and the shaped steel bracket firm.
third embodiment
The third embodiment of the invention relates to a cantilever type tower crane foundation structure which comprises a bearing platform 1, a profile steel corbel 3 and a tower crane embedded foundation 5, wherein a plurality of embedded steel plates 2 are arranged on the side surface of the bearing platform 1, two groups of profile steel corbels 3 are arranged, each group of profile steel corbels 3 independently bear two ground feet of the tower crane embedded 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 hanging manner, and the hanging end of each profile steel corbel 3 is connected with the embedded steel plates 2; the other end of the steel bracket 3 fixed on the bearing platform 1 adopts prestressed steel bars 4 for back pressure, as shown in fig. 2, furthermore, each group of steel brackets 3 is fixed on the bearing platform 1 through at least 4 prestressed steel bars 4, the prestressed steel bars 4 are preferably phi 32 finish-pressed deformed steel bars, the prestressed steel bars are used as main stress members of the anchoring structure, and the steel brackets and the bearing platform (concrete) are connected in a friction mode through exerting pretension.
further, as shown in fig. 3, cantilever type tower crane foundation structure still includes outsourcing concrete reinforcement 6, outsourcing concrete reinforcement 6 includes many transverse reinforcement 6.1 and many longitudinal reinforcement 6.2, many transverse reinforcement 6.1, many longitudinal reinforcement 6.2 are arranged along the 3 outlines of shaped steel bracket/crisscross all around, form the framework of steel reinforcement that the cross-section is right trapezoid, framework of steel reinforcement pouring has outsourcing concrete 7, pre-buried steel sheet 2, shaped steel bracket 3 and prestressing steel 4 all wrap up in among the outsourcing concrete 7, the embedded basis of tower crane 5 imbeds in outsourcing concrete 7 and its top exposes out in the top surface of outsourcing concrete 7. The outer concrete mainly has the function of preventing the tower crane foundation from being impacted.
The steel reinforced concrete structure is used as a protection structure for reducing the influence of external force impacting the steel bracket and protecting the steel reinforced concrete structure from corrosion caused by environmental influence; the tower crane foundation structure reduces the tower crane foundation setting difficulty, reduces the tower crane foundation structure size to the maximum extent under limited working conditions, reduces the distance between a tower crane and an attachment, simplifies the tower crane wall attachment structure, has strong practicability, and is worthy of further popularization in future construction.
Embodiment IV
The fourth embodiment of the invention relates to a construction method of a cantilever type tower crane foundation structure, which comprises the following steps: firstly, installing an embedded steel plate 2, prestressed reinforcements 4 and partial externally-wrapped concrete reinforcements 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, connecting the profile steel bracket 3 with the embedded steel plate 2 in a welding manner, and temporarily fixing the profile steel bracket 3 with 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. The embedded steel plates 2, the profile steel brackets 3, the prestressed reinforcements 4 and the outer concrete-coated reinforcements 6 are all processed and processed on the back site, and are transported to the front site for installation during implementation.
Parts of the above embodiments that are not specifically described are well known components and conventional structures or conventional means in the art and will not be described in detail herein.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
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).
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| CN201910707100.0A CN110565676B (en) | 2019-08-01 | 2019-08-01 | Cantilever type tower crane foundation structure and construction method thereof |
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| CN201910707100.0A CN110565676B (en) | 2019-08-01 | 2019-08-01 | Cantilever type tower crane foundation structure and construction method thereof |
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| CN111456077A (en) * | 2020-05-26 | 2020-07-28 | 中国建筑第四工程局有限公司 | Large bearing platform overhanging tower crane foundation |
| CN112030746A (en) * | 2020-04-22 | 2020-12-04 | 中铁广州工程局集团桥梁工程有限公司 | Method for dismantling water retaining steel cofferdam in advance in bridge construction |
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| 霍凯荣等: "浅谈山区高速公路钢构桥挂篮施工组织与管理", 中国公路学会桥梁和结构工程分会2015年全国桥梁学术会议论文集, 12 October 2015 (2015-10-12), pages 451 - 460 * |
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| CN112030746A (en) * | 2020-04-22 | 2020-12-04 | 中铁广州工程局集团桥梁工程有限公司 | Method for dismantling water retaining steel cofferdam in advance in bridge construction |
| CN112030746B (en) * | 2020-04-22 | 2021-10-15 | 中铁广州工程局集团桥梁工程有限公司 | Method for dismantling water retaining steel cofferdam in advance in bridge construction |
| CN111456078A (en) * | 2020-05-26 | 2020-07-28 | 中国建筑第四工程局有限公司 | Bracket type steel structure tower crane foundation |
| CN111456077A (en) * | 2020-05-26 | 2020-07-28 | 中国建筑第四工程局有限公司 | Large bearing platform overhanging tower crane foundation |
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