Steel lattice column type tower crane foundation

Abstract

The utility model belongs to the technical field of building construction equipment and facilities, propose a kind of steel lattice column formula tower crane foundation, including bored pile, steel lattice column, horizontal steel, oblique steel, pile cap and foundation section, the inside of bored pile is provided with reinforcement cage and positioning member, the bottom surface position of steel lattice column is close to pile cap is provided with bottom plate, the bottom plate is cross-shaped structure, the bottom plate is close to the position of four cross-shaped side edge and is provided with a row of first anchor bar, the middle of bottom plate is provided with round mouth, the mouth edge of round mouth is provided with multiple second anchor bar, which is circular array distribution. The utility model is positioned and supported to the side surface of the steel lattice column lowered by positioning member, cooperates with engineering wire laying, and it is favorable to improve the erection efficiency of tower crane foundation;The actual connecting fulcrum of steel lattice column and pile cap can be improved by first anchor bar and second anchor bar on bottom plate, and it is favorable to the safety and reliability of entire tower crane foundation.

Description

Technical Field

[0001] This utility model belongs to the technical field of building construction equipment and facilities, and in particular relates to a steel lattice column tower crane foundation. Background Technology

[0002] With the continuous development of the construction industry and the continuous improvement of construction technology, there are more and more ultra-high, ultra-deep, and ultra-large-scale projects. The support methods for ultra-deep foundation pits are complex. Generally, deep foundation pits use internal supports. It is difficult to install tower cranes at the bottom of deep foundation pits, and the initial foundation pit support cannot be utilized. In order to facilitate construction, tower cranes are installed and put into use during the foundation pit support construction stage. At the same time, in order to ensure the early use of tower cranes, the use of lattice tower crane foundations is more convenient for vertical transportation in the early stage of the project. The steel lattice column tower crane foundation adopts a drilled cast-in-place pile + lattice column + pile cap foundation. For example, the Chinese utility model patent with announcement number CN208009466U discloses a tower crane composite foundation of drilled cast-in-place piles and steel lattice columns, including four steel lattice columns, four drilled cast-in-place piles, and a tower crane pile cap. The lower end of the steel lattice column is inserted into the drilled cast-in-place pile, and the upper end is inserted into the tower crane pile cap.

[0003] In general, the steel cage installed in bored piles and the lowered steel lattice columns are positioned by engineering layout lines. The lack of a positioning structure is not conducive to improving the construction efficiency of tower crane foundations. Secondly, the top of the steel lattice column is connected to the steel mesh inside the foundation by anchor bars. The bottom of the foundation is usually also set up with a base plate connected to the steel lattice column, but the number of support points and anchor bars of the base plate is limited. There is still room to improve the structural strength of the steel lattice column and the foundation to improve the safety and reliability of the entire tower crane foundation. Utility Model Content

[0004] This utility model addresses the technical problems existing in the above-mentioned tower crane foundations by proposing a steel lattice column tower crane foundation that is reasonably designed, highly safe and reliable, and conducive to improving the construction efficiency of tower crane foundations.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a steel lattice column tower crane foundation, comprising four bored piles, with steel lattice columns installed within the bored piles. Horizontal and diagonal steel bars are installed between the steel lattice columns. A foundation platform is installed at the top of each steel lattice column, extending into the interior of the platform. A foundation section is installed at the top of the foundation platform. A reinforcing cage is installed inside each bored pile. Four positioning elements are installed on the reinforcing cage at 90-degree intervals. Each positioning element includes a vertical positioning tube, the tube body of which is used to cooperate with the side support of the steel lattice column. A base plate is installed on the bottom surface of the steel lattice column near the foundation platform. The bottom surface of the base plate contacts and cooperates with the horizontal steel bars. The base plate has a cross-shaped structure. A row of first anchor bars is installed on each of the four cross-shaped sides of the base plate. A circular opening is provided in the middle of the base plate, and multiple second anchor bars arranged in a circular array are provided around the opening.

[0006] Preferably, the positioning element includes a plurality of positioning grooves distributed along the length of the positioning tube, the longitudinal section of the positioning groove is triangular and its opening faces downward, and the interior of the positioning groove is provided with an inclined rod welded to the reinforcing cage.

[0007] Preferably, the steel lattice column has two supporting angle steels on two adjacent sides, and the supporting angle steels have a pair of lower connecting holes. The base plate has an upper connecting hole at a position corresponding to the lower connecting hole, and the upper connecting hole and the lower connecting hole are connected by a third anchor bar.

[0008] Preferably, the third anchor bar has an H-shaped structure and its lower half is connected to a pair of upper connecting holes and a pair of lower connecting holes simultaneously.

[0009] Preferably, the side of the positioning tube is provided with an elongated hollow hole.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This utility model provides a steel lattice column tower crane foundation. The positioning components can be used to position and support the sides of the lowered steel lattice columns. In conjunction with the engineering layout, this helps to improve the construction efficiency of the tower crane foundation. The first and second anchor bars on the base plate can improve the actual connection support between the steel lattice columns and the foundation, which is beneficial to the safety and reliability of the entire tower crane foundation. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A front view of a steel lattice column tower crane foundation provided for an embodiment; Figure 2 A cross-sectional view of a bored pile provided in an embodiment; Figure 3 for Figure 2 An enlarged schematic diagram of the cross-sectional view of a bored pile at point A; Figure 4 A perspective view of the reinforcing cage and positioning components provided in the embodiment; Figure 5 A top view of the reinforcing cage and positioning components provided in the embodiment; Figure 6 A perspective view of the positioning element provided in the embodiment; Figure 7 This is a three-dimensional view of a steel lattice column tower crane foundation (without a pile cap and foundation section); Figure 8 for Figure 7 Enlarged schematic diagram of the B-structure; In the above figures: 1. Drilled pile; 2. Steel lattice column; 3. Horizontal steel; 4. Diagonal steel; 5. Foundation cap; 6. Foundation section; 7. Reinforcing cage; 8. Positioning component; 81. Positioning tube; 82. Positioning groove; 83. Diagonal rod; 84. Hollow hole; 9. Base plate; 91. First anchor bar; 92. Round opening; 93. Second anchor bar; 10. Supporting angle steel; 11. Third anchor bar. Detailed Implementation

[0013] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0014] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0015] Examples, such as Figures 1-8As shown, this utility model provides a steel lattice column tower crane foundation, comprising four bored piles 1, with steel lattice columns 2 installed in the bored piles 1. Horizontal steel bars 3 and diagonal steel bars 4 are installed between the steel lattice columns 2. A foundation platform 5 is provided at the top of each steel lattice column 2 and extends into the interior of the foundation platform 5. A foundation section 6 is provided at the top of the foundation platform 5. A reinforcing cage 7 is installed inside each bored pile 1. The foundation platform 5 includes a reinforcing mesh and a concrete pouring layer. The reinforcing mesh is connected to the top portion of the steel lattice column 2 via foundation anchor bars to establish a basic connection. The horizontal steel bars 3 and diagonal steel bars 4 are welded to the steel lattice columns 2. The foundation section 6 is used to install the tower crane's tower body. Based on this, the reinforcing cage 7 provided by this utility model is a cylindrical reinforcing mesh structure, which is lowered into the bored pile 1 before the steel lattice column 2. The reinforcing cage 7 is provided with four positioning members 8 distributed at 90-degree intervals. The positioning member 8 includes a vertical positioning tube 81. The tube body of the positioning tube 81 is used to cooperate with the side support of the steel lattice column 2. The steel lattice column 2 is provided with a base plate 9 near the bottom surface of the foundation 5. The bottom surface of the base plate 9 is in contact with the horizontal steel 3. The base plate 9 has a cross-shaped structure. A row of first anchor bars 91 is provided on each of the four sides of the base plate 9 near the cross shape. A circular opening 92 is provided in the middle of the base plate 9. Multiple second anchor bars 93 are arranged in a circular array on the edge of the circular opening 92. The roots of the first anchor bars 91 and the second anchor bars 93 are welded to the base plate.

[0016] In this tower crane foundation, the outer wall of the positioning component 8 is a relatively smooth cylindrical surface. The four positioning components 8 correspond precisely to the four sides of the steel lattice column 2, thereby providing positioning support for the sides of the lowered steel lattice column 2. In conjunction with the engineering layout, this improves the lowering efficiency of the steel lattice column 2, thus enhancing the construction efficiency of the tower crane foundation. Furthermore, based on the internal connection between the steel lattice column 2 and the internal steel mesh of the foundation 5 using foundation anchor bars, this invention also sets four rows of first anchor bars 91 and a ring of second anchor bars 93 on the base plate 9. The first anchor bars 91 and second anchor bars 93 are also connected to the internal steel mesh of the foundation 5. The connection method can be binding or welding, which effectively increases the actual connection points between the steel lattice column 2 and the foundation 5, contributing to the safety and reliability of the entire tower crane foundation.

[0017] To improve the practicality of the positioning component 8, the positioning component 8 provided by this utility model includes multiple positioning grooves 82 distributed along the length of the positioning tube 81. The longitudinal section of the positioning groove 82 is triangular with its opening facing downwards. An inclined rod 83, welded to the reinforcing cage 7, is provided inside the positioning groove 82. The inclined rod 83 is inclined upwards and is used to hook onto the corresponding positioning groove 82, allowing the positioning tube 81 to be quickly distributed in four different positions on the inner wall of the reinforcing mesh. Furthermore, the two side walls of the positioning groove 82 provide an anti-detachment effect. The top of the positioning tube 81 can be pre-formed with a certain guide arc using a bending device to improve its guiding efficiency for the lowering of the steel lattice column 2.

[0018] To improve the structural reliability of the base plate 9, this invention provides two supporting angle steels 10 on two adjacent sides of the steel lattice column 2. Each supporting angle steel 10 has a pair of lower connecting holes, and the base plate 9 has an upper connecting hole corresponding to the lower connecting holes. The upper and lower connecting holes are connected by a third anchor bar 11. The cross-shaped edge of the base plate 9 is precisely positioned between adjacent steel lattice columns 2 and supported on the top surface of the supporting angle steels 10. The supporting angle steels 10 and the steel lattice columns 2 are fixed by welding, thereby establishing an effective support surface on the bottom surface of the base plate 9, and ensuring that the effective load-bearing capacity of the steel lattice columns 2 is within the design load range. In addition to the corresponding relationship between the base plate 9 and the supporting angle steels 10 established by the third anchor bar 11, a connection node is also established between the third anchor bar 11 and the reinforcing mesh inside the foundation 5, which helps to improve the structural reliability of the foundation 5, the steel lattice columns 2, and the base plate 9.

[0019] like Figure 8 As shown, the third anchor bar 11 provided by this utility model has an H-shaped structure, and its lower half is connected to a pair of upper connecting holes and a pair of lower connecting holes simultaneously. The ribs of the third anchor bar 11 can be directly pressed onto the top surface of the base plate 9, and its two legs are inserted into the paired upper connecting holes and lower connecting holes. The bottom of the lower connecting hole can be fixed to the third anchor bar 11 by spot welding, while the upper half of the third anchor bar 11 can be tied or welded to the steel mesh in the foundation 5. This third anchor bar 11 has good rapid positioning performance and strong practicality.

[0020] In order to improve the casting quality of the steel lattice column 2, this utility model provides a long strip-shaped hollow hole 84 on the side of the positioning tube 81. The hole on the side of the positioning tube 81 facilitates the filling of the positioning tube 81 with the casting material, thus avoiding the occurrence of hollow columns inside the positioning tube 81.

[0021] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A steel lattice column tower crane foundation, comprising four bored piles, wherein steel lattice columns are arranged within the bored piles, horizontal and diagonal steel bars are arranged between the steel lattice columns, a foundation cap is provided at the top of each steel lattice column and extends into the interior of the foundation cap, a foundation section is provided at the top of the foundation cap, and a reinforcing cage is arranged inside each bored pile, characterized in that, The steel cage is provided with four positioning components spaced at 90-degree intervals. Each positioning component includes a vertical positioning tube, the tube of which is used to cooperate with the side support of the steel lattice column. The steel lattice column has a base plate near the bottom surface of the foundation. The bottom surface of the base plate is in contact with the horizontal steel. The base plate has a cross-shaped structure. A row of first anchor bars is provided on each of the four sides of the base plate near the cross shape. A circular opening is provided in the middle of the base plate. Multiple second anchor bars are arranged in a circular array around the opening.

2. The steel lattice column tower crane foundation according to claim 1, characterized in that, The positioning component includes multiple positioning grooves distributed along the length of the positioning tube. The longitudinal section of the positioning groove is triangular and its opening faces downward. The interior of the positioning groove is provided with an inclined rod welded to the reinforcing cage.

3. A steel lattice column tower crane foundation according to claim 2, characterized in that, Two supporting angle steels are provided on two adjacent sides of the steel lattice column. A pair of lower connecting holes are provided on the supporting angle steels. An upper connecting hole is provided on the base plate at the position corresponding to the lower connecting hole. The upper connecting hole and the lower connecting hole are connected by a third anchor bar.

4. A steel lattice column tower crane foundation according to claim 3, characterized in that, The third anchor bar has an H-shaped structure and its lower half is connected to a pair of upper connecting holes and a pair of lower connecting holes simultaneously.

5. A steel lattice column tower crane foundation according to claim 4, characterized in that, The side of the positioning tube is provided with a long strip of hollow holes.

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