An end support for a middle angle brace of a foundation pit truss and a connecting structure of a middle angle brace of a foundation pit truss and a surrounding purlin

Abstract

The utility model provides a kind of end support for foundation pit truss mid-angle brace and the connecting structure of foundation pit truss mid-angle brace and surrounding purlin, end support includes for being connected with the inclined plane support of angle brace, the bottom of support is equipped with the limiting slot of lap joint with surrounding purlin and multiple triangular steel corbels, the bottom of support of the utility model is lap joint with the concrete corbel of surrounding purlin by setting triangular steel corbels, the shear capacity is increased after surrounding purlin is provided with concrete corbel, the strength and stability of connection are improved by triangular steel corbel, simultaneously, surrounding purlin limiting block and support whole form big triangle structure, lap joint structure is stable, shear performance is further promoted, and it is not easy to occur deformation and misplacement.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit protection technology, and in particular to a connection structure between a corner brace and a waler. Background Technology

[0002] In underground structural engineering, to meet construction excavation conditions and control deformation of the surrounding environment, plate support systems are typically used for foundation pit protection. Traditional plate support systems employ diaphragm walls around the foundation pit to retain the soil, with a support system in the center of the pit serving as a reaction point against the soil walls. Among existing support systems, steel structure support systems, in particular, are widely used due to their advantages such as factory prefabrication of components, convenient on-site construction, and reusability.

[0003] In existing steel structure support systems, walers, tensioned trusses, corner braces, and steel beams are typically the components of the system. Corner braces are mainly fixed to the corners of the walers used for foundation pits, serving as reaction points for the soil at the corners of the pit. In addition to bearing compressive forces, the connection nodes between the corner braces and the walers must also withstand significant shear forces; therefore, the structure between the corner braces and the walers requires excellent shear resistance. Utility Model Content

[0004] The purpose of this utility model is to propose a support member with good overlapping effect and shear resistance, as well as a connection structure between the corner brace and the waler.

[0005] To achieve the above objectives, this utility model proposes an end support for corner bracing in a foundation pit truss. The end support includes an inclined support for connecting with the corner bracing, and the bottom of the support is provided with a limiting groove for overlapping with the waler and multiple triangular steel brackets.

[0006] Furthermore, the inclined support includes a first inclined steel plate and a second inclined steel plate arranged in parallel front to back, and the first inclined steel plate and the second inclined steel plate are fixedly supported by multiple stiffening plates.

[0007] Furthermore, the first inclined steel plate is positioned towards the end of the corner brace, and the surface of the first inclined steel plate is provided with through holes for bolt fixing to the end of the corner brace.

[0008] Furthermore, a bottom support that overlaps with the waler is installed on the back of the second inclined steel plate;

[0009] The limiting slot is located at the bottom of the bottom support, and the side wall of the waler is provided with a limiting block. After the limiting block is fixed in the limiting slot, the bottom support and the limiting block are connected as a whole to form a stable triangular structure.

[0010] The present invention also proposes a connection structure between corner braces and walers in a foundation pit truss. The side wall of the waler is provided with a limiting block and continuous concrete corbels. Triangular grooves are reserved between the continuous concrete corbels. The connection between the end support and the waler is achieved by overlapping the limiting slot of the end support member with the limiting block and inserting the triangular steel corbel into the groove. The inclined support of the end support member is connected to the end of the corner brace by bolts.

[0011] Compared with the prior art, the advantages of this utility model are:

[0012] 1. The bottom of the support component of this utility model is connected to the concrete corbel of the waler by setting a triangular steel bracket. The shear resistance of the waler is increased after the concrete corbel is set. The triangular steel bracket improves the strength and stability of the connection and avoids displacement of the support component after long-term use.

[0013] 2. The bottom of the support component of this utility model is provided with a limiting groove to overlap with the limiting block of the waler side wall, which facilitates on-site positioning and installation by workers, and at the same time improves the shear resistance of the waler side wall. Furthermore, the limiting block and the support component form a large triangular structure as a whole, and the overlapping structure is stable and not prone to deformation or misalignment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the steel structure support system in this embodiment of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall structure of the support member in an embodiment of this utility model;

[0016] Figure 3 This is an enlarged structural diagram of the support member and waler in an embodiment of this utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be further described below.

[0018] like Figure 1 As shown, the sidewalls of the foundation pit are constructed with a ring of walers 1. The steel structure support consists of corner braces 2 located at the corners of the walers 1, main steel beam supports 3 located in the middle span of the walers 1, and tensioned trusses 4 arranged around the sidewalls of the walers 1, overlapping the ends of the corner braces 2 and the main steel beam supports 3. The corner braces 2 are mainly used to apply a reaction force against the corner walls of the foundation pit, strengthening the support structure at the corners of the walers 1 and preventing corner collapse. The main steel beam supports 3 are mainly used to provide support in the middle span of the foundation pit, ensuring that the large-span foundation pit is supported at intervals. The tensioned trusses 4 are mainly used to provide a reaction force support for the sidewalls of the large-span walers 1.

[0019] like Figure 3As shown, this utility model proposes an end support 5 for corner bracing in a foundation pit truss. The end support 5 includes an inclined support for connecting to the corner brace. The inclined support consists of a first inclined steel plate 51 and a second inclined steel plate 52 arranged parallel to each other. The first inclined steel plate 51 and the second inclined steel plate 52 are fixedly supported by multiple stiffening plates. The first inclined steel plate 51 is positioned towards the end of the corner brace, and its surface has through holes for bolt fixing to the end of the corner brace. A bottom support 53 that overlaps with the waler is installed on the back of the second inclined steel plate 52. The bottom support 53 has a limiting groove 54 that overlaps with the waler and multiple triangular steel brackets 55.

[0020] In this embodiment, as Figure 2 As shown, the side wall of the waler is provided with a limiting block 12 and continuous concrete brackets 11. Triangular grooves are reserved between the continuous concrete brackets 11. After the triangular steel brackets 55 are inserted into the grooves, the end support 5 is connected to the waler. The overlapping structure of the triangular grooves and the concrete brackets 11 facilitates the positioning of the end support 5, enhances the connection stability, and effectively improves the shear resistance of the connection structure between the end support 5 and the waler, thereby providing strong support for the connection of the corner braces.

[0021] At the same time, such as Figure 2 As shown, the side wall of the waler is provided with a limiting block 12. After the limiting block 12 is fixed in the limiting slot 54, the bottom support 53 and the limiting block 12 are connected as a whole to form a stable triangular structure, thereby improving the stability of the corner brace connection.

[0022] The above are merely preferred embodiments of this utility model and do not constitute any limitation on this utility model. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and contents disclosed in this utility model without departing from the scope of the technical solutions of this utility model shall still fall within the protection scope of this utility model.

Claims

1. An end support member for corner bracing in a foundation pit truss, characterized in that, The end support includes an inclined support for connecting with the corner brace, and the bottom of the support has a limiting groove for overlapping with the waler and multiple triangular steel brackets.

2. The end support member for corner bracing in the foundation pit truss according to claim 1, characterized in that, The inclined support includes a first inclined steel plate and a second inclined steel plate arranged in parallel front and rear, and the first inclined steel plate and the second inclined steel plate are fixedly supported by multiple stiffening plates.

3. The end support member for corner bracing in the foundation pit truss according to claim 2, characterized in that, The first inclined steel plate is positioned toward the end of the corner brace, and the surface of the first inclined steel plate is provided with through holes for bolting to the end of the corner brace.

4. The end support member for corner bracing in the foundation pit truss according to claim 3, characterized in that, A bottom support that overlaps with the waler is installed on the back of the second inclined steel plate; The limiting slot is located at the bottom of the bottom support, and the side wall of the waler is provided with a limiting block. After the limiting block is fixed to the limiting slot, the bottom support and the limiting block are integrally connected to form a stable triangular structure.

5. A connection structure between corner braces and walers in a foundation pit truss, characterized in that, Use the end support member for corner bracing in the foundation pit truss as described in any one of claims 1-4; The side wall of the waler is provided with a limiting block and continuous concrete corbels. Triangular grooves are reserved between the continuous concrete corbels. The end support is connected to the waler by overlapping the limiting slot of the end support with the limiting block and inserting the triangular steel corbel into the groove. The inclined support of the end support is connected to the end of the corner brace by bolts.

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