Assembly type enclosing purlin support for bearing platform foundation pit support

Abstract

The utility model relates to a bearing platform foundation pit support assembly type enclosing purlin support which comprises long-edge section steel, short-edge section steel, middle section steel, angle supporting section steel, right-angle connecting pieces and inclined strut connecting pieces. The long-edge section steel and the short-edge section steel are connected through the right-angle connecting pieces and are perpendicular to each other, and the long-edge section steel and the middle section steel are connected through the right-angle connecting pieces and are perpendicular to each other. The two ends of the angle supporting profile steel are obliquely connected with the long-edge profile steel and the short-edge profile steel in an acute angle mode through the inclined strut connecting pieces, main bodies of the right-angle connecting pieces and the inclined strut connecting pieces are inverted-U-shaped supports, namely downward clamping grooves are formed, connecting plates are arranged on the two sides of each inverted-U-shaped support, connecting holes are formed in the connecting plates, and the connecting plates on the two sides are arranged in the mode that the horizontal planes are high and low. And the long-edge section steel, the short-edge section steel, the middle section steel and the angle supporting section steel are locked and fixed with the connecting holes of the corresponding connecting plates through bolt pieces. The enclosing purlin support adopts a full-assembly mode, does not need welding, is convenient and efficient to connect, and saves time and labor.

Description

Technical Field

[0001] The utility model relates to the field of foundation pit support, and is an assembled purlin bracket for supporting a foundation pit. Background Art

[0002] Foundation pit support refers to the support, reinforcement and protection measures taken on the side walls and surrounding environment in order to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. The existing foundation pit support structure usually adopts a welded structure, that is, a steel purlin structure is formed by welding steel sections. Although this structure is reliable and stable, it has high construction intensity and is usually difficult to dismantle and recycle, and the cost investment is high. In order to solve this problem, as shown in the authorization announcement number CN221721663U published in the Chinese patent literature, the authorization announcement date is September 17, 2024, and the utility model name is "foundation pit support structure". It discloses a purlin structure, a middle bracket, and a corner bracket, and discloses that the purlin structure and the middle bracket and the corner bracket are detachably connected. However, the structure of its detachable connection is mainly supported by tie rods and corbels. The number of structures is large, the overall connection is still relatively complex, the alignment installation is inconvenient, and the workload is large. For this reason, the existing foundation pit support purlin structure needs to be improved. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a prefabricated purlin support for foundation pit support in the field, which solves the technical problems of existing similar foundation pit support purlins, such as the relatively complex structure, cumbersome assembly and positioning, and low installation efficiency. This purpose is achieved through the following technical solutions.

[0004] A prefabricated purlin bracket for foundation pit protection, the purlin bracket includes long side steel, short side steel, middle steel, and angle support steel, and the long side steel, short side steel, middle steel, and angle support steel are all H-shaped steel; the key point of its structure is that the purlin bracket includes right-angle connectors and diagonal brace connectors, the long side steel and the short side steel, as well as the long side steel and the middle steel are connected perpendicularly to each other through right-angle connectors, and the two ends of the angle support steel are connected by diagonal braces The right-angle connector and the diagonal brace connector are connected at an acute angle to the long side steel and the short side steel. The main bodies of the right-angle connector and the diagonal brace connector are both inverted U-shaped brackets, that is, a downward slot is formed. Connecting plates are provided on both sides of the inverted U-shaped bracket. The connecting plates are provided with connecting holes, and the connecting plates on both sides are arranged in a horizontal plane, one high and one low. When the long side steel is connected to the short side steel and the middle steel through the right-angle connecting plate, the slot of the inverted U-shaped bracket of the right-angle connector is stuck in the vertical plate on the side of the notch on the long side steel. The connecting plates on one side of the right-angle connector are limited to be located in the upper notch of the long side steel, and the connecting plates on the other side of the right-angle connector are limited to be located in the lower notch of the corresponding short side steel and the middle steel, that is, the long side steel forms a limited pre-support state for the short side steel and the middle steel through the right-angle connector; when the two ends of the angle support steel are connected to the long side steel and the short side steel through the diagonal bracing connector, the card slot of the inverted U-shaped bracket of the diagonal bracing connector is clamped in the corresponding long side steel and short side steel On one side of the upper notch of the vertical plate, the connecting plate on one side of the diagonal brace connector is limited to the upper notch of the corresponding long-side steel and short-side steel, and the connecting plate on the other side of the diagonal brace connector is limited to the lower notch at one end of the corresponding angle support steel. That is, the two ends of the angle support steel are pre-supported relative to the long-side steel and short-side steel by the diagonal brace connector. The long-side steel, short-side steel, intermediate steel, and angle support steel are all locked and fixed to the connection holes of the corresponding connecting plates by bolts. Through the above structure, the purlin bracket adopts a fully assembled method, without welding, and has the effect of assembly alignment when using right-angle connectors and diagonal brace connectors, making the connection more convenient and efficient, saving time and effort.

[0005] The width of the connecting plate at the corresponding lower notch of the right-angle connector and the diagonal brace connector is consistent with the width of the lower notch. Through this structure, the right-angle connector and the diagonal brace connector can be positioned reliably and stably when matched with the corresponding notch of the H-shaped steel.

[0006] The long side steel, short side steel, middle steel and angle support steel are all provided with waist-shaped holes corresponding to the connection holes of the connection plates of the right-angle connector and the diagonal support connector. Through this structure, the waist-shaped holes facilitate bolt adjustment and alignment connection, making the connection more convenient.

[0007] One side of the inverted U-shaped bracket of the right-angle connector flatly mates with the upper notch end surface of the corresponding short-side steel and middle steel. The same applies to one side of the inverted U-shaped bracket of the diagonal brace connector, which flatly mates with the upper notch end surface of the corresponding angle brace steel. This structure makes the alignment connection of the short-side steel, middle steel, and angle brace steel more reliable and stable, and reduces deformation of the right-angle connector and diagonal brace connector.

[0008] The long side steel and the middle steel are connected to the angle support steel via the diagonal bracing connector. This structure further improves the stability of the entire purlin.

[0009] The utility model adopts prefabricated parts assembly, which makes the assembly and installation convenient and efficient, saving time and labor, and can be easily disassembled and reused in the later stage. The overall cost is low, and it is suitable for use as an assembled purlin structure for various types of foundation pit enclosures, or for the improvement of similar structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the planar structure of embodiment 1 of the present utility model.

[0011] Figure 2 for Figure 1 Schematic diagram of the split structure.

[0012] Figure 3 It is a schematic cross-sectional view of the utility model in which the long side steel and the short side steel are connected by a right-angle connector.

[0013] Figure 4 It is a schematic diagram of the three-dimensional structure of the right-angle connector of the present utility model.

[0014] Figure 5 It is a schematic diagram of the three-dimensional structure of one type of diagonal bracing connector of the present invention.

[0015] Figure 6 It is a three-dimensional structural schematic diagram of another diagonal bracing connector of the present invention.

[0016] Figure 7 It is a schematic diagram of the planar structure of embodiment 2 of the present utility model.

[0017] The serial numbers and names in the figure are: 1. Long side steel, 2. Short side steel, 3. Middle steel, 4. Angle support steel, 5. Right angle connector, 6. Diagonal brace connector. Implementation Method

[0018] The present invention will now be further described with reference to the accompanying drawings.

[0019] like Figures 1-6As shown, the foundation pit enclosure assembled purlin support includes long side steel 1, short side steel 2, middle steel 3, angle support steel 4, angle connectors, diagonal bracing connectors 6, and the long side steel 1, short side steel 2, middle steel 3, and angle support steel 4 are all H-shaped steels. The long side steel 1 and the short side steel 2 are combined to form a rectangular purlin frame, and the middle steel 3 is connected between the middle parts of the symmetrical long side steels 1, and the ends of the long side steel 1 and the short side steel 2, as well as the ends of the long side steel 1 and the middle steel 3 are connected perpendicularly to each other through right-angle connectors 5. The angle support steel 4 is obliquely arranged at the four end corners of the rectangular purlin frame, and the two ends of the angle support steel 4 are connected to the long side steel 1 and the short side steel 2 through diagonal bracing connectors 6. The main bodies of the right-angle connectors 5 and the diagonal bracing connectors 6 are all The inverted U-shaped bracket forms a downward card slot, and connecting plates are provided on both sides of the inverted U-shaped bracket. The connecting plates are provided with connecting holes, and the connecting plates on both sides are set in a horizontal plane with one high and one low; when the long side steel 1 is connected to the short side steel 2 and the middle steel 3 through the right-angle connecting plate, the card slot of the inverted U-shaped bracket of the right-angle connector 5 is stuck in the vertical plate on one side of the notch on the long side steel 1, and the connecting plates on one side of the right-angle connector 5 are limited to be located in the upper notch of the long side steel 1, and the connecting plates on the other side of the right-angle connector 5 are limited to be located in the corresponding short side steel 2 , and the lower notch of the middle section steel 3, and the width of the connecting plate on this side is consistent with the width of the corresponding lower notch, that is, the long side section steels 1 on both sides form a limited pre-support state for the two ends of the short side section steels 2 and the two ends of the middle section steel 3 through the right-angle connector 5; when the two ends of the angle support section steel are connected to the long side section steel 1 and the short side section steel 2 through the diagonal bracing connector 6, the card slot of the inverted U-shaped bracket of the diagonal bracing connector 6 is stuck in the vertical plate on one side of the notch of the corresponding long side section steel 1 and the short side section steel 2, and the connecting plate on one side of the diagonal bracing connector 6 is limited to the corresponding long side section steel 1 , the short side steel 2, the other side connecting plate of the diagonal bracing connector 6 is limited in the lower recess of one end of the corresponding angle support steel 4, and the plate width of the connecting plate on this side is consistent with the width of the lower recess, that is, the two ends of the angle support steel 4 are pre-supported with respect to the long side steel 1 and the short side steel 2 through the diagonal bracing connector 6; the long side steel 1, the short side steel 2, the middle steel 3, and the angle support steel 4 are all provided with waist-shaped holes corresponding to the connecting holes of the connecting plates, and the waist-shaped holes and the corresponding connecting holes are locked and fixed by bolts.

[0020] Furthermore, in order to make the connection between the short side steel 2, the middle steel 3 and the angle support steel more reliable and stable, and reduce the deformation of the right-angle connector 5 and the diagonal support connector 6, one side surface of the inverted U-shaped bracket of the above-mentioned right-angle connector 5 is flatly fitted and offset against the upper notch end surface of the corresponding short side steel 2 and the middle steel 3.

[0021] The specific installation process of the assembled purlin bracket for the foundation pit support is as follows: first, a corbel structure for supporting the purlin structure is preset on the retaining piles of the foundation pit support, and then the two long side steel sections 1 are pre-hoisted into place, and the right-angle connectors 5 are pre-inserted into the inner vertical plates at both ends and the middle position of the long side steel sections 1, and then the two short side steel sections 2 and an intermediate steel section 3 are hoisted into place in sequence. After they are in place, the lower notches at both ends of the short side steel sections 2 and the ends of the intermediate steel sections 3 are aligned with the corresponding connecting plates on one side of the right-angle connector 5. After alignment, the short side steel sections 2 and the intermediate steel sections 3 can be fixed to the corresponding connecting plates by bolts, and the connecting plates on the other side of the right-angle connector 5 are locked and fixed to the corresponding long side steel sections 1 by bolts, thus completing the connection between the long side steel sections 1 and the short side steel sections 2 and the intermediate steel sections 3. Next, the angle support steel sections 4 are installed, and the diagonal bracing connectors 6 are pre-inserted into the inner vertical plates of the long side steel sections 1 and the short side steel sections 2, that is, Figure 5 、 Figure 6 Two types of diagonal bracing connectors 6, and then align the lower notches at both ends of the angle support steel 4 with the connecting plates on one side of the corresponding diagonal bracing connector 6. After alignment, the two ends of the angle support steel 4 can be locked and fixed with the connecting plates on that side of the diagonal bracing connector 6 through bolts. Finally, the connecting plates on the other side of the diagonal bracing connector 6 are locked and fixed with the corresponding long side steel 1 through bolts, and the installation of the purlin bracket is completed.

[0022] like Figure 7 As shown, in order to further improve the stability of the purlin bracket, an angle support steel 4 can be added between the above-mentioned intermediate steel 3 and the long side steel 1. The same connection method between the above-mentioned angle support steel 4 and the long side steel 1 and the short side steel 2 is adopted to complete the installation between the angle support steel 4 and the intermediate steel 3 and the long side steel 1.

[0023] The above content is intended to illustrate the technical means of the present invention and is not intended to limit the technical scope of the present invention. Those skilled in the art who, in combination with existing common knowledge, make obvious improvements or substitutions to the present invention also fall within the scope of protection of the claims of the present invention.

Claims

1. A foundation pit support assembly type purlin bracket, the purlin bracket comprising a long side steel (1), a short side steel (2), an intermediate steel (3), and an angle support steel (4), wherein the long side steel (1), the short side steel (2), the intermediate steel (3), and the angle support steel (4) are all H-shaped steels; characterized in that The purlin bracket comprises a right-angle connector (5) and a diagonal brace connector (6). The long side steel (1) and the short side steel (2), as well as the long side steel (1) and the middle steel (3) are connected perpendicularly to each other through the right-angle connector (5). The two ends of the angle support steel (4) are connected to the long side steel (1) and the short side steel (2) through the diagonal brace connector (6) at an acute angle. The main bodies of the right-angle connector (5) and the diagonal brace connector (6) are both inverted U-shaped brackets, that is, a downward The slot is provided on both sides of the inverted U-shaped bracket, and the connecting plates are provided with connecting holes, and the connecting plates on both sides are arranged in a horizontal plane with one high and one low; when the long side steel (1) is connected to the short side steel (2) and the middle steel (3) through the right-angle connecting plate, the slot of the inverted U-shaped bracket of the right-angle connecting piece (5) is clamped in the vertical plate on one side of the notch of the long side steel (1), and the connecting plates on one side of the right-angle connecting piece (5) are limited to be located in the upper notch of the long side steel (1), and the connecting plates on the other side of the right-angle connecting piece (5) are limited to be located in the corresponding The short side steel (2) and the middle side steel (3) are placed in the lower notch of the short side steel (2) and the middle side steel (3), that is, the long side steel (1) forms a limited pre-support state for the short side steel (2) and the middle side steel (3) through the right-angle connector (5); when the two ends of the angle support steel are connected to the long side steel (1) and the short side steel (2) through the diagonal brace connector (6), the card slot of the inverted U-shaped bracket of the diagonal brace connector (6) is clamped in the vertical plate on one side of the notch of the corresponding long side steel (1) and the short side steel (2), and the connecting plate on one side of the diagonal brace connector (6) is limited. The connecting plate on the other side of the diagonal bracing connector (6) is located in the upper notch of the corresponding long-side steel (1) and short-side steel (2), and the connecting plate on the other side of the diagonal bracing connector (6) is limited to the lower notch at one end of the corresponding angle support steel (4), that is, the two ends of the angle support steel (4) are in a limited pre-supported state relative to the long-side steel (1) and short-side steel (2) through the diagonal bracing connector (6); the long-side steel (1), short-side steel (2), middle steel (3), and angle support steel (4) are all locked and fixed to the connecting holes of the corresponding connecting plates by bolts.

2. The assembled purlin bracket for foundation pit protection of the cap according to claim 1 is characterized in that The width of the connecting plates at the corresponding lower notches of the right-angle connecting piece (5) and the diagonal bracing connecting piece (6) is consistent with the width of the lower notch.

3. The assembled purlin bracket for foundation pit protection of the cap according to claim 1 is characterized in that The long side steel (1), short side steel (2), middle steel (3), and angle support steel (4) are all provided with waist-shaped holes corresponding to the connection holes of the connection plates of the right-angle connector (5) and the diagonal support connector (6).

4. The assembled purlin bracket for foundation pit protection of the cap according to claim 1 is characterized in that One side surface of the inverted U-shaped bracket of the right-angle connector (5) is in plane contact with the upper notch end surface of the corresponding short-side steel (2) and the middle steel (3), and one side surface of the inverted U-shaped bracket of the diagonal brace connector (6) is in plane contact with the upper notch end surface of the corresponding angle support steel (4).

5. The assembled purlin bracket for foundation pit protection of the cap according to claim 1 is characterized in that The long side steel sections (1) and the middle steel sections (3) are connected to the angle support steel sections (4) via the diagonal support connectors (6).

Images