A latticed column and a strengthened structure of a bearing platform

Abstract

The utility model belongs to tower crane foundation field, propose a kind of strengthening structure of lattice column and pile cap, including four two two symmetrical distribution's steel lattice column, the top of steel lattice column is provided with pile cap and is inserted into the inside of pile cap, steel lattice column is provided with bottom plate in the position of the bottom surface close to pile cap, the bottom surface of bottom plate is provided with four groups of double horizontal steel, both ends of double horizontal steel are welded with steel lattice column, bottom plate is cross-shaped structure, bottom plate is provided with a row of first anchor bar in the position close to its four cross-shaped side, the middle of bottom plate is provided with round mouth, the mouth edge of round mouth is provided with multiple second anchor bar in circular array distribution. The utility model provides the top position of steel lattice column adopts the design of double horizontal steel and can improve the structure strength of its top portion, and the uppermost layer horizontal steel directly supports bottom plate, and first anchor bar and second anchor bar on bottom plate effectively increase the actual connecting fulcrum of steel lattice column and pile cap, beneficial to the safety and reliability of entire tower crane foundation.

Description

Technical Field

[0001] This utility model belongs to the field of tower crane foundations, and in particular relates to a reinforced structure for lattice columns and foundations. 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] Currently, 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 connected to the steel lattice column by a base plate. However, 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 enhance the safety and reliability of the entire tower crane foundation. Utility Model Content

[0004] This utility model addresses the technical problems existing in the tower crane foundation mentioned above by proposing a reinforced structure for lattice columns and foundations that is reasonably designed and conducive to improving the safety and reliability of the tower crane foundation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a reinforcing structure for a lattice column and a foundation, comprising four symmetrically distributed steel lattice columns in pairs. The top of each steel lattice column is provided with a foundation extending into the interior of the foundation. A base plate is provided on the bottom surface of each steel lattice column near the foundation. Four sets of symmetrically distributed double horizontal steel bars are provided on the bottom surface of the base plate. The two ends of the double horizontal steel bars are welded to the steel lattice column. 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 four cross-shaped sides. A circular opening is provided in the middle of the base plate. Multiple second anchor bars distributed in a circular array are provided on the edge of the circular opening.

[0006] 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.

[0007] 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.

[0008] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This utility model provides a reinforced structure for a lattice column and a foundation. The top of the steel lattice column adopts a double horizontal steel design, which can improve the structural strength of its top part. The uppermost horizontal steel directly supports the base plate, while the first and second anchor bars on the base plate effectively increase the actual connection points between the steel lattice column and the foundation, which is beneficial to the safety and reliability of the entire tower crane foundation. Attached Figure Description

[0009] 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.

[0010] Figure 1 A perspective view of a reinforced structure (without a foundation) for a lattice column and foundation provided as an embodiment; Figure 2 A front view of a reinforced structure of a lattice column and a foundation provided for an embodiment; Figure 3 for Figure 1 An enlarged schematic diagram of a reinforced structure of a lattice column and foundation at point A; In the above figures: 1. Steel lattice column; 2. Foundation; 3. Base plate; 31. Round opening; 4. Double horizontal steel; 5. Supporting angle steel; 6. First anchor bar; 7. Second anchor bar; 8. Third anchor bar. Detailed Implementation

[0011] 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.

[0012] 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.

[0013] Examples, such as Figures 1-3As shown, the present invention provides a reinforced structure for a lattice column and a foundation, comprising four symmetrically distributed steel lattice columns 1 in pairs. The top of each steel lattice column 1 is provided with a foundation 2 extending into the interior of the foundation 2. The bottom of the steel lattice column 1 is lowered into a bored pile. The foundation 2 includes a steel mesh and a concrete pouring layer. The steel mesh is connected to the top part of the steel lattice column 1 through foundation anchor bars to establish a basic connection relationship. Multiple sets of horizontal and diagonal steel bars are provided along the length direction between adjacent steel lattice columns 1, and all are welded and fixed to the steel lattice column 1. Based on this, the steel lattice column 1 is provided with a base plate 3 near the bottom surface of the foundation 2. The bottom surface of the base plate 3 is provided with four sets of double horizontal steel bars 4 symmetrically distributed in pairs. The two ends of the double horizontal steel bars 4 are welded to the steel lattice column 1. The base plate 3 has a cross-shaped structure. The base plate 3 is provided with a row of first anchor bars 6 near the four sides of the cross shape. The center of the base plate 3 is provided with a circular opening 31. Multiple second anchor bars 7 are provided in a circular array around the opening of the circular opening 31. Specifically, the double horizontal steel bars 4 at the top of the steel lattice column 1 can improve the structural strength of its top part, and the uppermost horizontal steel bars directly support the base plate 3. Based on the internal connection between the steel lattice column 1 and the internal steel mesh of the foundation 2 using foundation anchor bars, four rows of first anchor bars 6 and a ring of second anchor bars 7 are also set on the base plate 3. The first anchor bars 6 and the second anchor bars 7 are also connected to the internal steel mesh of the foundation 2. The connection method can be binding or welding. This can effectively increase the actual connection support points between the steel lattice column 1 and the foundation 2, which is beneficial to the safety and reliability of the entire steel lattice column 1 and foundation 2.

[0014] To improve the structural reliability of the base plate 3, this invention provides two supporting angle steels 5 on two adjacent sides of the steel lattice column 1. Each supporting angle steel 5 has a pair of lower connecting holes, and the base plate 3 has an upper connecting hole corresponding to the lower connecting holes. The upper and lower connecting holes are connected by a third anchor bar 8. The cross-shaped edge of the base plate 3 is precisely positioned between adjacent steel lattice columns 1 and supported on the top surface of the supporting angle steels 5. The supporting angle steels 5 and the uppermost horizontal steel of the double horizontal steel are staggered, jointly supporting the base plate 3. The supporting angle steels 5 are fixed to the steel lattice column 1 by welding, thus establishing an effective support surface on the bottom surface of the base plate 3, and ensuring that the effective load-bearing capacity of the steel lattice column 1 is within the design load range. In addition to the corresponding relationship between the base plate 3 and the supporting angle steels 5 established by the third anchor bar 8, a connection node is also established between the third anchor bar 8 and the internal steel reinforcement mesh of the foundation 2, which helps to improve the structural reliability of the foundation 2, the steel lattice column 1, and the base plate 3.

[0015] Furthermore, the third anchor bar 8 provided by this utility model has an H-shaped structure, and its lower half is simultaneously connected to a pair of upper connecting holes and a pair of lower connecting holes. The ribs of the third anchor bar 8 can be directly pressed onto the top surface of the base plate 3, 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 8 by spot welding, while the upper half of the third anchor bar 8 can be tied or welded to the steel mesh in the foundation 2. This third anchor bar 8 has good rapid positioning performance and strong practicality.

[0016] 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 reinforcing structure for lattice columns and foundations, comprising four symmetrically arranged steel lattice columns, each steel lattice column having a foundation at its top extending into the interior of the foundation, and each steel lattice column having a base plate near the bottom surface of the foundation, characterized in that, The bottom surface of the base plate is provided with four sets of double horizontal steel bars symmetrically distributed in pairs. The two ends of the double horizontal steel bars are welded to the steel lattice columns. The base plate has a cross-shaped structure. The base plate is provided with a row of first anchor bars near the four sides of the cross shape. The center of the base plate is provided with a circular opening. Multiple second anchor bars are provided in a circular array around the opening.

2. The reinforcing structure of the lattice column and foundation according to claim 1, 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.

3. The reinforcing structure of the lattice column and the foundation according to claim 2, 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.

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