Foundation pit steel supporting bracket and construction method thereof

Abstract

The invention discloses a foundation pit steel supporting bracket and a construction method thereof, and the foundation pit steel supporting bracket comprises two channel steel brackets which are horizontally and symmetrically welded on the two sides of a latticed column; the two pieces of supporting profile steel are located above the channel steel brackets and are horizontally and symmetrically welded to the two sides of the latticed column, the two channel steel brackets and the two pieces of supporting profile steel are distributed in a #-shaped mode, and each piece of supporting profile steel is perpendicularly welded to the two channel steel brackets on the side where the supporting profile steel is located; the four first tie steel plates are welded to the four corners of the latticed column and the supporting profile steel on the outer side of the channel steel bracket correspondingly; and the second tie steel plates are positioned between the two channel steel brackets and are symmetrically welded on the support profile steels and the latticed columns on the sides of the support profile steels. The device has the advantages of being simple in structure, stable, reliable, safe, small in size, small in occupied space, convenient to construct and high in installation efficiency, occupying of a construction working face is reduced, and obstruction to foundation pit construction is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a foundation pit steel support bracket and a construction method thereof. Background Art

[0002] In deep foundation pit construction, in order to ensure the safety of the foundation pit, steel support, as a key component of the internal support system, is particularly important for large and deep foundation pits. In the actual construction process, since the length of the steel support is usually long, a steel support bracket needs to be set on the lattice column in the middle of the foundation pit to ensure the stability of the steel support. Traditional steel support brackets have complex structures, large volumes, large space occupation, and great construction difficulty. Summary of the invention

[0003] The purpose of the present invention is to provide a foundation pit steel support bracket and a construction method thereof, so as to solve the problems of traditional steel support brackets having complex structure, large volume, large occupied space, great construction difficulty, low installation efficiency, large occupation of foundation pit construction working surface, and large obstruction to foundation pit construction.

[0004] In order to solve the above technical problems, the present invention provides a foundation pit steel support bracket, comprising:

[0005] There are two channel steel brackets, which are horizontally and symmetrically welded on both sides of the lattice column;

[0006] There are two supporting steels, which are located above the channel steel brackets and are horizontally and symmetrically welded to the two sides of the lattice column. The two channel steel brackets and the two supporting steels are distributed in a tic-tac-toe shape, and each supporting steel is vertically welded to the two channel steel brackets on the same side;

[0007] The first tie steel plates are four pieces, which are welded to the four corners of the lattice column and the supporting steel on the outside of the channel steel bracket;

[0008] The second tie steel plates, which are an even number, are located between the two channel steel brackets and are symmetrically welded to each supporting steel section and the lattice column on its side.

[0009] Furthermore, in the foundation pit steel support bracket provided by the present invention, the supporting steel is an H-shaped steel, the flange plate of the H-shaped steel is arranged horizontally, and the web plate of the H-shaped steel is arranged vertically.

[0010] Furthermore, the foundation pit steel support bracket provided by the present invention further includes:

[0011] The cover steel plates are in two pieces, and each of the supporting steel sections is welded to the lattice column through a cover steel plate.

[0012] Furthermore, in the foundation pit steel support bracket provided by the present invention, the cover steel plate is aligned between the upper and lower flange plates on the side of the H-shaped steel close to the lattice column.

[0013] Furthermore, in the foundation pit steel support bracket provided by the present invention, stiffening plates are welded at even intervals between the upper and lower flange plates of the H-shaped steel located on both sides of the web.

[0014] Furthermore, the foundation pit steel support bracket provided by the present invention further includes:

[0015] The triangular brackets are divided into two groups and are horizontally distributed on both sides of the lattice column. The triangular brackets are located below the channel steel brackets and are welded to the lattice column and the channel steel brackets.

[0016] Furthermore, in the foundation pit steel support bracket provided by the present invention, each group of triangular brackets includes at least one right-angled triangular steel plate welded to each limb of the lattice column on the side, and one right-angled side of the right-angled triangular steel plate is distributed horizontally, and the other right-angled side is distributed vertically.

[0017] Furthermore, in the foundation pit steel support bracket provided by the present invention, the first tie steel plate is an isosceles right-angled triangle steel plate, and the angle between the first tie steel plate and the supporting steel section is 30-45 degrees.

[0018] Furthermore, in the foundation pit steel support bracket provided by the present invention, the second tie steel plate is a right-angled triangular steel plate, and the right-angled triangular steel plate is perpendicular to the supporting steel section.

[0019] In order to solve the above technical problems, the present invention also provides a construction method of a foundation pit steel support bracket, comprising:

[0020] Two sets of triangular brackets are welded horizontally and symmetrically on the lattice columns of the foundation pit;

[0021] A channel steel bracket is welded to each set of triangular brackets, so that the two channel steel brackets are horizontally and symmetrically distributed on both sides of the lattice column;

[0022] A supporting steel is welded vertically above each channel steel bracket, and two supporting steels are horizontally and symmetrically welded on both sides of the lattice column, so that the two channel steel brackets and the two supporting steels are distributed in a tic-tac-toe shape;

[0023] The first tie steel plates are welded to the four corners of the lattice column and the supporting steel sections located outside the channel steel bracket;

[0024] At least one second tie steel plate is welded between each supporting steel section and the lattice column between the channel steel brackets.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The foundation pit steel support bracket and the construction method thereof provided by the present invention are mainly composed of two channel steel brackets, two supporting steel sections, four first tie steel plates and an even number of second tie steel plates. The bracket has the advantages of simple structure, small volume and small space occupation, which reduces the occupation of the construction work surface and reduces the obstacles to the foundation pit construction; the channel steel bracket and the supporting steel section are welded to each other in a tic-tac-toe shape and welded to the lattice column, which has the advantages of convenient construction, high installation efficiency and stable structure, wherein the first tie steel plate and the second tie steel plate are respectively welded between the lattice column and the supporting steel section, which improves the reliability and stability of the connection of the supporting steel section on the lattice column, thereby ensuring the stability of the steel support supported thereon. By supporting the supporting steel section by the channel steel bracket, the firmness of the supporting steel section welded to the lattice column and the bearing capacity of the foundation pit steel support can be improved, and the safety of supporting the foundation pit steel support can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the planar structure of the foundation pit steel support bracket;

[0028] Figure 2 It is a schematic diagram of the front elevation structure of the foundation pit steel support bracket;

[0029] Figure 3 It is a schematic diagram of the side elevation structure of the foundation pit steel support bracket;

[0030] Figure 4 It is a schematic diagram of the main structure of the supporting steel;

[0031] Figure 5 It is a side view structural diagram of the supporting steel;

[0032] As shown in the figure:

[0033] 1. Supporting steel, 11. Stiffening plate, 12. Cover steel plate, 2. Channel steel bracket, 21. Triangular bracket, 3. First tie steel plate, 4. Second tie steel plate, 5. Lattice column, 51. Limb, 52. Tie plate. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings: The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0035] Please refer to Figures 1 to 5 The embodiment of the present invention provides a foundation pit steel support bracket, comprising:

[0036] There are two channel steel brackets 2, which are horizontally symmetrically welded on both sides of the lattice column 5. The cross-section of the lattice column 5 is generally designed as a biaxially symmetrical or uniaxially symmetrical cross-section of a steel section or a steel plate, and is mainly composed of a limb 51 and a plate 52. The limb 51 mainly bears the axial force, and the plate 52 mainly resists the lateral force. Specifically, the web of the channel steel bracket 2 is welded on the plate 52 of the lattice column 5, and the limb 51 is usually an angle steel. In order to ensure structural stability and balanced force, the two channel steel brackets 2 have the same specifications and strength grades. The lengths of the channel steel brackets 2 on both sides of the lattice column 5 are equal.

[0037] There are two support steels 1, which are located above the channel steel bracket 2 and are horizontally symmetrically welded on both sides of the lattice column 5. The two channel steel brackets 2 and the two support steels 1 are distributed in a tic-tac-toe shape, and each support steel 1 is vertically welded to the two channel steel brackets 2 on the side. In order to improve the bearing capacity, the support steel 1 can be an H-shaped steel, the flange plate of the H-shaped steel is arranged horizontally, and the web plate of the H-shaped steel is arranged vertically. In order to improve the reliability of the connection between the support steel 1 and the lattice column 5, each support steel 1 can be welded to the lattice column 5 through a cover steel plate 11. Specifically, the cover steel plate 11 is aligned between the upper and lower flange plates of the H-shaped steel close to the lattice column 5, and the cover steel plate 11 is welded to the lattice column 5. The cover steel plate 11 can be a rectangular steel plate. At this time, the cover steel plate 11 and the upper and lower flange plates of the H-shaped steel form a vertical plane, which can improve the welding surface with the lattice column 5 and improve the reliability of the support steel 1 welding on the lattice column 5. Each supporting steel 1 is symmetrically distributed with the lattice column 5 as the center, which can improve the balance effect, that is, the length of the supporting steel 1 on both sides of the lattice column 5 is equal. At this time, the cover steel plate 11 is located in the middle of the supporting steel 1, and is fully welded to the upper and lower flange plates of the lattice column 5 and the H-shaped steel to improve the reliability of the connection. In order to improve the fitting stability of the lattice column 5 and the supporting steel 1, the length of the cover steel plate 12 shall not be less than twice the width of the lattice column 5; then, when welding the cover steel plate 12 and the lattice column 5, the plate surface of the cover steel plate 12 and the side of the limb 51 or the gusset plate 52 are fitted to ensure that the cover steel plate 12 is placed horizontally and can be fully welded with the two corners of the lattice column 5.

[0038] There are four first tie steel plates 3, which are welded to the four corners of the lattice column 5 and the supporting steel 1 on the outside of the channel steel bracket 2. The four first tie steel plates 3 are used to improve the connection strength, firmness and reliability of the supporting steel 1 welded to the lattice column 5. The first tie steel plates 3 can be isosceles right-angled triangular steel plates. Isosceles right-angled triangular steel plates can balance the forces between the supporting steel 1 and the lattice column 5 and evenly share the load. The two right-angled sides of the first tie steel plate 3 are fully welded to the upper flange plate of the supporting steel 1 and one corner of the lattice column 5, respectively. The plane where the first tie steel plate 3 is located is perpendicular to the plane where the upper flange plate of the supporting steel 1 is located, and maintains an angle of 30 to 45 degrees with the plane where the limb 51 or the gusset plate 52 of the lattice column 5 to which it is connected, that is, the angle between the first tie steel plate 3 and the inner side of the supporting steel 1 is 30 to 45 degrees.

[0039] The second tie steel plates 4 are an even number of pieces, located between the two channel steel brackets 2 and symmetrically welded to each supporting steel 1 and the lattice column 5 on its side. The second tie steel plates 4 can be right-angled triangular steel plates, which are perpendicular to the supporting steel 1. The two right-angled sides of the second tie steel plates 4 are fully welded to the upper flange plate of the supporting steel 1 and the limbs 51 of the lattice column 5, respectively. The plane where the second inclined steel plates 4 are located is perpendicular to the plane where the upper flange plate of the supporting steel 1 is located, and is perpendicular to the plane where the limbs 51 of the lattice column 5 connected to it are located.

[0040] Please focus on Figure 1 , Figure 2 and Figure 4 In order to improve the structural strength and bearing capacity of the supporting steel 1, the foundation pit steel support bracket provided by the embodiment of the present invention has stiffening plates 11 welded evenly between the upper and lower flange plates on both sides of the web of the H-shaped steel. That is, stiffening plates 11 are arranged on both sides of the supporting steel 1 along its length direction.

[0041] Please refer to Figures 1 to 3 In order to further improve the horizontal alignment of the channel steel bracket 2 and improve the bearing capacity of the supporting steel 1, the foundation pit steel support bracket provided by the embodiment of the present invention may also include:

[0042] There are two groups of triangular brackets 21, which are horizontally distributed on both sides of the lattice column 5, located below the channel steel bracket 2 and welded to the lattice column 5 and the channel steel bracket 2. Each group of triangular brackets 21 includes at least one right-angled triangular steel plate that can be welded to each limb of the lattice column 5 on the side, and one right-angled side of the right-angled triangular steel plate is horizontally distributed and the other right-angled side is vertically distributed. The right-angled triangular steel plate has the advantages of easy welding and good bearing capacity. However, it is not limited to this, and it can also be a tripod.

[0043] Please refer to Figures 1 to 5The embodiment of the present invention also provides a construction method of a foundation pit steel support bracket, which may include:

[0044] Step S601, horizontally and symmetrically welding two sets of triangular brackets 21 on the lattice columns 5 of the foundation pit.

[0045] Step S602 , welding a channel steel bracket 2 to each set of triangular brackets 21 , so that the two channel steel brackets 2 are horizontally symmetrically distributed on both sides of the lattice column 5 .

[0046] Step S603, a supporting steel 1 is welded vertically above each channel steel bracket 2, and two supporting steels 1 are horizontally and symmetrically welded on both sides of the lattice column 5, so that the two channel steel brackets 2 and the two supporting steels 1 are distributed in a tic-tac-toe shape.

[0047] Step S604 , first tie steel plates 3 are welded to four corners of the lattice column 5 and the supporting steel 1 located outside the channel steel bracket 2 .

[0048] Step S605 , at least one second tie steel plate 4 is welded between each supporting steel section 1 and the lattice column 5 between the channel steel brackets 2 .

[0049] The foundation pit steel support bracket and the construction method thereof provided by the embodiment of the present invention are mainly composed of two channel steel brackets 2, two supporting steels 1, four first tie steel plates 3 and an even number of second tie steel plates 4. The structure is simple, the volume is small, and the space occupied is small, which reduces the occupation of the construction work surface and reduces the obstacles to the foundation pit construction. The channel steel bracket 2 and the supporting steel 1 are welded to each other in a crisscross pattern and welded to the lattice column 5, which has the advantages of convenient construction, high installation efficiency and stable structure. The first tie steel plate 3 and the second tie steel plate 4 are respectively welded between the lattice column 5 and the supporting steel 1, which improves the reliability and stability of the connection of the supporting steel 1 on the lattice column 5, thereby ensuring the stability of the steel support supported thereon. The channel steel bracket 2 lifts and supports the supporting steel 1, which can improve the firmness of the supporting steel 1 welded to the lattice column 5, as well as the bearing capacity of the foundation pit steel support, and ensure the safety of the foundation pit steel support.

[0050] The foundation pit steel support bracket and the construction method thereof provided by the embodiment of the present invention preferably adopt the full welding method for welding each connection node to improve the reliability of the connection and avoid the problem of de-welding caused by the load when supporting the foundation pit steel support, which may cause a safety accident.

[0051] The present invention is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the embodiments of the present invention, but not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. A foundation pit steel support bracket, characterized in that: include: There are two channel steel brackets, which are horizontally and symmetrically welded on both sides of the lattice column; There are two supporting steels, which are located above the channel steel brackets and are horizontally and symmetrically welded to the two sides of the lattice column. The two channel steel brackets and the two supporting steels are distributed in a tic-tac-toe shape, and each supporting steel is vertically welded to the two channel steel brackets on the same side; The first tie steel plates are four pieces, which are welded to the four corners of the lattice column and the supporting steel on the outside of the channel steel bracket; The second tie steel plates, which are an even number, are located between the two channel steel brackets and are symmetrically welded to each supporting steel section and the lattice column on its side.

2. The foundation pit steel support bracket according to claim 1, characterized in that: The supporting steel is an H-shaped steel, the flange plate of the H-shaped steel is arranged horizontally, and the web plate of the H-shaped steel is arranged vertically.

3. The foundation pit steel support bracket according to claim 2, characterized in that: Also includes: The cover steel plates are in two pieces, and each of the supporting steel sections is welded to the lattice column through a cover steel plate.

4. The foundation pit steel support bracket according to claim 3, characterized in that: The cover steel plate is aligned between the upper and lower flange plates on one side of the H-shaped steel close to the lattice column.

5. The foundation pit steel support bracket according to claim 2, characterized in that: Stiffening plates are welded evenly at intervals between the upper and lower flange plates on both sides of the web of the H-shaped steel.

6. The foundation pit steel support bracket according to claim 1, characterized in that: Also includes: The triangular brackets are divided into two groups and are horizontally distributed on both sides of the lattice column. The triangular brackets are located below the channel steel brackets and are welded to the lattice column and the channel steel brackets.

7. The foundation pit steel support bracket according to claim 6, characterized in that: Each group of triangular brackets comprises at least one right-angled triangular steel plate welded to each limb of the lattice column on the side, wherein one right-angled side of the right-angled triangular steel plate is horizontally distributed and the other right-angled side is vertically distributed.

8. The foundation pit steel support bracket according to claim 1, characterized in that: The first tie steel plate is an isosceles right-angled triangle steel plate, and the angle between the first tie steel plate and the supporting steel section is 30-45 degrees.

9. The foundation pit steel support bracket according to claim 1, characterized in that: The second tie steel plate is a right-angled triangular steel plate, and the right-angled triangular steel plate is perpendicular to the supporting steel.

10. A construction method for a foundation pit steel support bracket according to claim 6, characterized in that: include: Two sets of triangular brackets are welded horizontally and symmetrically on the lattice columns of the foundation pit; A channel steel bracket is welded to each set of triangular brackets, so that the two channel steel brackets are horizontally and symmetrically distributed on both sides of the lattice column; A supporting steel is welded vertically above each channel steel bracket, and two supporting steels are horizontally and symmetrically welded on both sides of the lattice column, so that the two channel steel brackets and the two supporting steels are distributed in a tic-tac-toe shape; The first tie steel plates are welded to the four corners of the lattice column and the supporting steel sections located outside the channel steel bracket; At least one second tie steel plate is welded between each supporting steel section and the lattice column between the channel steel brackets.

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