A foundation pit steel support bracket and a construction method thereof

Abstract

The application discloses a foundation pit steel support bracket and a construction method thereof. The foundation pit steel support bracket comprises: channel steel brackets, two, horizontally and symmetrically welded on two sides of a lattice column; support type steels, two, horizontally and symmetrically welded on two sides of the lattice column above the channel steel brackets, the two channel steel brackets and the two support type steels are distributed in a cross shape, each support type steel is vertically welded on two channel steel brackets on the same side; first tie steel plates, four, respectively welded on four corners of the lattice column and the support type steels outside the channel steel brackets; and second tie steel plates, even pieces, symmetrically welded on each support type steel and the lattice column on the same side between the two channel steel brackets. The application has the advantages of simple structure, stability, reliability, safety, small volume, small space occupation, reduced occupation of a construction operation surface, convenient construction, high installation efficiency and reduced hindering to foundation pit construction.

Description

TECHNICAL FIELD

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

[0002] In deep foundation pit construction, in order to ensure the safety of the foundation pit, the steel support, as a key component of the internal support system, is particularly important for the foundation pit with large area and deep depth. In the actual construction process, because the length of the steel support is usually long, the 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. The traditional steel support bracket has the problems of complex structure, large volume, large space occupation, high construction difficulty, low installation efficiency, large foundation pit construction work surface occupation and large foundation pit construction obstruction surface. SUMMARY

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

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

[0005] The channel steel bracket is two, horizontally and symmetrically welded on both sides of the lattice column;

[0006] The support steel is two, horizontally and symmetrically welded on both sides of the lattice column above the channel steel bracket, and the two channel steel brackets and the two support steels are distributed in the shape of a cross, and each support steel is vertically welded on the two channel steel brackets on the same side;

[0007] The first tie plate is four, and each is welded on the four corners of the lattice column and the support steel outside the channel steel bracket;

[0008] The second tie plate is an even number, and is symmetrically welded on each support steel and the lattice column on the same side between the two channel steel brackets.

[0009] Further, the foundation pit steel support bracket provided by the present application is provided, the support steel is H-shaped steel, the flange plate of the H-shaped steel is horizontally arranged, and the web plate of the H-shaped steel is vertically arranged.

[0010] Further, the foundation pit steel support bracket provided by the present application further comprises:

[0011] The cover plate is two, and each support steel is welded on the lattice column through one cover plate.

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

[0013] Further, the foundation steel support bracket provided by the present application is characterized in that the H-shaped steel is welded with the stiffener plate uniformly and regularly between the upper and lower flange plates on both sides of the web plate.

[0014] Further, the foundation steel support bracket provided by the present application further comprises:

[0015] The triangular bracket is horizontally distributed on both sides of the lattice column and welded on the lattice column and the channel bracket below the channel bracket.

[0016] Further, the foundation steel support bracket provided by the present application is characterized in that each group of the triangular bracket comprises at least one right-angled triangular steel plate welded on each limb of the lattice column on the side.

[0017] Further, the foundation steel support bracket provided by the present application is characterized in that the first tie steel plate is an isosceles right-angled steel plate, and the included angle between the first tie steel plate and the support steel is 30-45 degrees.

[0018] Further, the foundation steel support bracket provided by the present application is characterized in that the second tie steel plate is a right-angled steel plate, and the right-angled steel plate is perpendicular to the support steel.

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

[0020] The two groups of triangular brackets are horizontally and symmetrically welded on the lattice column of the foundation pit;

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

[0022] One support steel is vertically welded above each channel bracket, and the two support steels are horizontally and symmetrically welded on both sides of the lattice column, so that the two channel brackets and the two support steels are distributed in the shape of a cross;

[0023] The first tie steel plate is welded on the four corners of the lattice column and the support steel outside the channel bracket;

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

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

[0026] The pit steel support bracket and the construction method thereof provided by the application mainly comprise two channel steel brackets, two support type steels, four first tie steel plates and an even number of second tie steel plates, have the advantages of simple structure, small volume and small space occupation, reduce the occupation of the construction operation surface and the hindrance to the pit construction, the channel steel brackets and the support type steels are distributed in the shape of a cross and are welded with each other and on the lattice column, have the advantages of convenient construction, high installation efficiency and stable structure, the first tie steel plate and the second tie steel plate are welded between the lattice column and the support type steel, improve the reliability and stability of the connection of the support type steel on the lattice column, thereby ensuring the stability of the steel support supported thereon, the support type steel is supported by the channel steel bracket, the firmness of the support type steel welded on the lattice column and the bearing capacity of the pit steel support are improved, and the safety of the pit steel support is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a plan view of the pit steel support bracket;

[0028] Figure 2 is a front view of the pit steel support bracket;

[0029] Figure 3 is a side view of the pit steel support bracket;

[0030] Figure 4 is a front view of the support type steel;

[0031] Figure 5 is a side view of the support type steel;

[0032] In the drawings:

[0033] 1, support type steel, 11, stiffener, 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, patch plate. DETAILED DESCRIPTION

[0034] The application will be described in detail below with reference to the drawings: the advantages and features of the application will be clearer according to the following description. It should be noted that the drawings are very simplified and use non-precise proportions, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the application.

[0035] Please refer to Figures 1 to 5 The embodiment of the application provides a pit steel support bracket, which comprises:

[0036] The channel steel bracket 2 is two, horizontally symmetrically welded on both sides of the lattice column 5. The lattice column 5 is generally designed as a double-axial symmetric or single-axial symmetric section, which is mainly composed of a limb 51 and a panel 52. The limb 51 mainly bears axial force, and the panel 52 mainly resists lateral force. Specifically, the web of the channel steel bracket 2 is butt-welded on the panel 52 of the lattice column 5, and the limb 51 is generally an angle steel. In order to ensure the structural stability and balance stress, the two channel steel brackets 2 are of the same size and the same strength grade. The lengths of the two channel steel brackets 2 on both sides of the lattice column 5 are equal.

[0037] The support steel 1 is two, horizontally symmetrically welded on both sides of the lattice column 5 above the channel steel bracket 2. The two channel steel brackets 2 and the two support steels 1 are distributed in the shape of a cross. Each support steel 1 is vertically welded on the two channel steel brackets 2 on the same side. In order to improve the carrying capacity, the support steel 1 can be an H-shaped steel, the flange plate of which is horizontally arranged, and the web of which is vertically arranged. 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 on the side close to the lattice column 5, and the cover steel plate 11 is welded to the panel 52 of the lattice column 5. The cover steel plate 11 can be a rectangular steel plate, which forms a vertical plane with the upper and lower flange plates of the H-shaped steel, thereby improving the welding surface with the lattice column 5 and improving the reliability of the welding of the support steel 1 to the lattice column 5. Each support steel 1 is symmetrically distributed around the lattice column 5, which can improve the balance effect, i.e. the lengths of the two support steels 1 on both sides of the lattice column 5 are equal. At this time, the cover steel plate 11 is located in the middle of the support steel 1, and the lattice column 5, the upper and lower flange plates of the H-shaped steel are all connected by full welding, so as to improve the connection reliability. In order to improve the fitting stability of the lattice column 5 and the support steel 1, the length of the cover steel plate 12 should 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 surface of the cover steel plate 12 is in close contact with the side surface of the limb 51 or the panel 52, so that the cover steel plate 12 is horizontally placed and can be fully welded with the two corners of the lattice column 5.

[0038] The first tie steel plate 3 is four, and is welded on the support profile steel 1 outside the four corners of the lattice column 5 and the channel steel bracket 2. The four first tie steel plates 3 improve the connection strength, firmness and reliability of the support profile steel 1 welded on the lattice column 5. The first tie steel plate 3 can be an isosceles right triangle steel plate. The isosceles right triangle steel plate can balance the force between the support profile steel 1 and the lattice column 5, and divide the load. Two right angle edges of the first tie steel plate 3 are fully welded with the upper flange plate of the support profile 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 support profile steel 1 is located, and the angle between the plane where the first tie steel plate 3 is located and the plane where the limb 51 or the infill plate 52 of the lattice column 5 is located is 30-45 degrees, that is, the angle between the first tie steel plate 3 and the inner edge of the support profile steel 1 is 30-45 degrees.

[0039] The second tie steel plate 4 is an even number, and is symmetrically welded on each support profile steel 1 and the lattice column 5 on the side of the support profile steel 1 between the two channel steel brackets 2. The second tie steel plate 4 can be a right triangle steel plate, and the right triangle steel plate is perpendicular to the support profile steel 1. Two right angle edges of the second tie steel plate 4 are fully welded with the upper flange plate of the support profile steel 1 and the limb 51 of the lattice column 5, respectively. The plane where the second tie steel plate 4 is located is perpendicular to the plane where the upper flange plate of the support profile steel 1 is located, and the plane where the second tie steel plate 4 is located is perpendicular to the plane where the limb 51 of the lattice column 5 is located.

[0040] Please refer to Figure 1 , Figure 2 and Figure 4 , in order to improve the structural strength and bearing capacity of the support profile steel 1, the base pit steel support bracket provided by the embodiment of the application is provided with a stiffener plate 11 which is uniformly and spacedly welded between the upper and lower flange plates on both sides of the web plate of the H-shaped steel. That is, the stiffener plate 11 is arranged on both sides of the support profile steel 1 along the length direction of the support profile steel 1.

[0041] Please refer to Figures 1 to 3 , in order to further improve the horizontal alignment of the channel steel bracket 2 and the bearing capacity of the support profile steel 1, the base pit steel support bracket provided by the embodiment of the application can further comprise:

[0042] The triangular bracket 21 is two groups, and is horizontally distributed on both sides of the lattice column 5 and welded on the lattice column 5 and the channel steel bracket 2 below the channel steel bracket 2. Each group of the triangular bracket 21 comprises at least one right triangle steel plate which can be welded on each limb of the lattice column 5 on the side. One right angle edge of the right triangle steel plate is horizontally distributed, and the other right angle edge is vertically distributed. The right triangle steel plate has the advantages of convenient welding and good bearing capacity. However, it is not limited to this, and can also be a tripod.

[0043] Please refer to Figures 1 to 5The embodiment of the present application also provides a construction method of the foundation pit steel support bracket, which can comprise the following steps:

[0044] Step S601, two groups of triangular brackets 21 are symmetrically welded horizontally on the lattice column 5 of the foundation pit.

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

[0046] Step S603, a support profile steel 1 is welded vertically on the upper side of each channel steel bracket 2, and two support profile steels 1 are symmetrically welded horizontally on both sides of the lattice column 5, so that the two channel steel brackets 2 and the two support profile steels 1 are distributed in the shape of a cross.

[0047] Step S604, a first tie plate 3 is welded on the four corners of the lattice column 5 and the support profile steel 1 located on the outer side of the channel steel bracket 2.

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

[0049] The foundation pit steel support bracket and the construction method thereof provided by the embodiment of the present application mainly comprise two channel steel brackets 2, two support profile steels 1, four first tie plates 3 and an even number of second tie plates 4, which have the advantages of simple structure, small volume and small space occupation, reduce the occupation of the construction operation surface and the hindrance to the foundation pit construction; the channel steel bracket 2 and the support profile steel 1 are welded in the shape of a cross and on the lattice column 5, which have the advantages of convenient construction, high installation efficiency and stable structure, wherein the first tie plate 3 and the second tie plate 4 are welded between the lattice column 5 and the support profile steel 1, which improves the reliability and stability of the connection of the support profile steel 1 on the lattice column 5, thereby ensuring the stability of the steel support supported thereon. The channel steel bracket 2 can lift and support the support profile steel 1, which can improve the firmness of the support profile steel 1 welded on the lattice column 5 and the bearing capacity of the foundation pit steel support, thereby ensuring 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 application, the welding of each connection node is preferentially full welding, so as to improve the reliability of the connection and avoid the problem of disconnection caused by the load when supporting the foundation pit steel support, thereby causing safety accidents.

[0051] The present application is not limited to the above-described specific embodiments, and it is obvious that the above-described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application. Those of ordinary skill in the art can make other levels of modifications and changes to the present application. Thus, if these modifications and changes of the present application belong to the scope of the claims of the present application, the present application also intends to include these modifications and changes.

Claims

1. A steel support bracket for a foundation pit, characterised in that, It comprises: Two channel steel brackets horizontally symmetrically welded on both sides of the lattice column; Two support steel bars horizontally symmetrically welded on both sides of the lattice column above the channel steel brackets, the support steel bars being H-shaped steel, the flange plates of the H-shaped steel being horizontally arranged, and the web plates of the H-shaped steel being vertically arranged; two cover steel plates, which are aligned between the upper and lower flange plates of the H-shaped steel on one side of the lattice column, each support steel bar being welded to the lattice column by one cover steel plate; the two channel steel brackets and the two support steel bars being distributed in a cross shape, and each support steel bar being vertically welded to the two channel steel brackets on the same side; Four first tie steel plates welded to the four corners of the lattice column and the support steel bars outside the channel steel brackets; An even number of second tie steel plates symmetrically welded to each support steel bar and the lattice column on the same side.

2. The pit steel support bracket according to claim 1, wherein, The H-shaped steel is uniformly spaced and welded with stiffening plates between the upper and lower flange plates on both sides of the web plate.

3. The excavation steel support bracket of claim 1, wherein, It further comprises: Two groups of triangular brackets horizontally distributed on both sides of the lattice column and welded to the lattice column and the channel steel brackets below the channel steel brackets.

4. The pit steel support bracket according to claim 3, wherein, Each group of triangular brackets comprises at least one right-angled triangular steel plate welded to each limb of the lattice column on the same side, one of the right-angled edges of the right-angled triangular steel plate being horizontally distributed, and the other being vertically distributed.

5. The excavation steel support bracket of claim 1, wherein, The first tie steel plate is an isosceles right-angled steel plate, and the included angle between the first tie steel plate and the support steel bar is 30-45 degrees.

6. The excavation steel support bracket of claim 1, wherein, The second tie steel plate is a right-angled steel plate, and the right-angled steel plate is perpendicular to the support steel bar.

7. A method of constructing a caisson steel support bracket as claimed in claim 3, wherein, It comprises: Two groups of triangular brackets horizontally symmetrically welded on the lattice column of the foundation pit; One channel steel bracket is welded on each group of triangular brackets, so that the two channel steel brackets are horizontally symmetrically distributed on both sides of the lattice column; A support steel bar is welded vertically above each channel steel bracket, and the two support steel bars are horizontally symmetrically welded on both sides of the lattice column, so that the two channel steel brackets and the two support steel bars are distributed in a cross shape; First tie steel plates are welded to the four corners of the lattice column and the support steel bars outside the channel steel brackets; At least one second tie steel plate is welded between each support steel bar and the lattice column between the channel steel brackets.

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