Anti-shearing structure of anchor bearing and enclosing purlin in foundation pit truss

Abstract

The utility model provides an anti-shearing structure of an anchor bearing and an enclosing purlin in a foundation pit truss, a plurality of continuous trapezoidal concrete brackets are arranged on the side surface of the enclosing purlin of the foundation pit, and a triangular groove is formed between every two adjacent trapezoidal concrete brackets; a plurality of triangular steel corbels which are opposite to the grooves in number and matched with the grooves in shape are arranged at the bottom of the anchor base, and each triangular steel corbel is inserted into the corresponding groove. The concrete bracket and the triangular steel bracket are additionally arranged between the anchor seat and the enclosing purlin, so that the lap joint stability of the enclosing purlin and the lap joint stability between the enclosing purlin and the anchor seat are effectively improved, the shear resistance of a connecting node is improved, and effective support is provided for a steel structure system of a foundation pit.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit protection technology, and in particular to a connection structure between an anchor 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 structures such as diaphragm walls and piles around the foundation pit to retain the soil, while a support system is installed inside the pit 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 main steel beam supports are typically the components of the system. Anchorages are mainly used for the overlap between the ends of corner braces, main steel beam supports, and tensioned trusses and the walers. This connection node needs to withstand significant shear forces, therefore the structure between the anchorage and the walers must have good shear resistance. Utility Model Content

[0004] The purpose of this invention is to propose an anchorage mechanism that has a stable overlapping effect and excellent shear resistance of the overlapping structure.

[0005] To achieve the above objectives, this utility model proposes a shear-resistant structure for anchorage and waler in a foundation pit truss. The side of the foundation pit waler is provided with multiple continuous trapezoidal concrete corbels, and a triangular groove is formed between adjacent trapezoidal concrete corbels.

[0006] The bottom of the anchor is provided with multiple triangular steel brackets that correspond to the number of grooves and match their shape. Each triangular steel bracket is inserted into the corresponding groove.

[0007] Furthermore, the anchor includes a web, a base plate, and an end plate;

[0008] The front section of the web is set as the tie rod hinge; the section of the web diagonally above the tie rod hinge is the cable connection; the rear section of the web is the main support.

[0009] The end plate is vertically fixed above the main support to fix the main support; the bottom plate is vertically connected to the bottom of the web; multiple vertical reinforcing ribs are provided between the bottom plate, the end plate and the main support.

[0010] Furthermore, multiple stiffening plates are vertically arranged between the base plate and the cable connection.

[0011] Furthermore, the tail end of the anchor is connected to an extension seat by bolts.

[0012] Furthermore, the extension seat is connected to the tail end plate of the anchor seat, and multiple transverse reinforcing ribs are provided between the tail end plate and the adjacent vertical reinforcing ribs.

[0013] Furthermore, the base plates of both the anchor and the extension seat are fixed to the pit waler by multiple reinforcing anchor rods.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] 1. By adding concrete brackets and triangular steel brackets between the anchor seat and the waler, the shear resistance of the waler itself and the relationship between the waler and the anchor seat is effectively improved.

[0016] 2. By adding concrete brackets and triangular steel brackets between the anchor and the waler, the overlap accuracy between the two is improved. The concrete brackets and triangular steel brackets play a good limiting role and stability, and will not displace even under long-term support.

[0017] 3. The anchor of this utility model improves the overall structural strength by using horizontal and vertical reinforcing ribs, and at the same time adds an extension seat to increase the overlap area between the anchor and the main support of the steel beam, thereby improving the connection strength between the anchor and the main support of the steel beam.

[0018] 4. The anchor seat of this utility model is fixed to the waler by multiple reinforcing anchor rods, which further improves the connection performance of the structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the steel structure support system in this embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the shear-resistant structure of the anchor and waler in an embodiment of this utility model. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] like Figure 2 As shown, this utility model proposes a shear-resistant structure for the anchor 5 and waler 1 in a foundation pit truss, which is applied to the steel structure support of the aforementioned foundation pit, such as... Figure 2 The shear-resistant structure is mainly used for supporting the bottom of the main steel beam support 3 and the ends of the tensioned truss 4. The specific structure is as follows: multiple continuous trapezoidal concrete corbels 11 are provided on the side of the pit waler 1, and triangular grooves are formed between adjacent trapezoidal concrete corbels 11; multiple triangular steel corbels 51 with the same number and shape as the grooves are provided at the bottom of the anchor seat 5. Each triangular steel corbel 51 is inserted into the corresponding groove. By utilizing the stability of the triangle combined with the overlapping fit between the upper trapezoidal protrusions, the positioning effect of the anchor seat 5 is effectively improved, and the overall shear resistance of the anchor seat 5 is also improved.

[0024] In this embodiment, the anchor 5 includes a web plate 52, a bottom plate 53, and an end plate 54; the front section of the web plate 52 is set as a tie rod hinge part for hinged connection of the tie rod end of the tensioned truss 4, and the web plate 52 is located diagonally above the tie rod hinge part for inserting the cable end of the tensioned truss 4; the rear section of the web plate 52 is the main support part.

[0025] In this embodiment, the end plate 54 is vertically fixed above the main support part and connected to the end of the main support 3 of the steel beam by high-strength bolts; the bottom plate 53 is vertically connected to the bottom of the web plate 52; multiple vertical reinforcing ribs 55 are provided vertically between the bottom plate 53, the end plate 54 and the main support part, and the reinforcing ribs fully strengthen the overall structure of the anchor 5 and improve the shear resistance of the anchor 5.

[0026] In this embodiment, multiple stiffening plates are vertically arranged between the base plate 53 and the cable connection part to improve the shear resistance of the cable connection part.

[0027] In this embodiment, the tail end of the anchor 5 is connected to an extension seat 6 by bolts. The extension seat 6 is connected to the tail end plate 54 of the anchor 5. Multiple transverse reinforcing ribs are provided between the tail end plate 54 and the adjacent vertical reinforcing ribs 55. The extension seat 6 is set according to the width of the main support 3 of the steel beam. If the traditional anchor 5 cannot be adapted to the wider main support 3 of the steel beam, the overlap area between the anchor 5 and the main support 3 of the steel beam can be increased by setting the extension seat 6.

[0028] In this embodiment, as Figure 1 As shown, the base plates 53 of both the anchor seat 5 and the extension seat 6 are fixed to the pit waler 1 by multiple reinforcing anchor rods 7. The reinforcing anchor rods 7 not only fix the anchor seat 5 to the waler 1, but also further enhance the shear resistance between the anchor seat 5 and the waler 1.

[0029] 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. A shearing structure of an anchor base and a surrounding purlin in a foundation pit truss, characterized by, The side of the foundation pit enclosing purlin is provided with a plurality of continuous trapezoidal concrete brackets, and triangular grooves are formed between adjacent trapezoidal concrete brackets. The bottom of the anchor base is provided with a plurality of triangular steel brackets which are matched in shape with the grooves, and each triangular steel bracket is inserted into the corresponding groove.

2. The shear-resistant structure of the anchor base and the enclosing purlin in the foundation pit truss according to claim 1, characterized in that, The anchor base comprises a web, a bottom plate and an end plate; The front section of the web is a pull rod hinged part, the obliquely upper part of the web is a cable connecting part, and the rear section of the web is a main support supporting part. The end plate is vertically fixed above the main support supporting part for fixing the main support, and the bottom plate is vertically connected to the bottom of the web.

3. The shear-resistant structure of the anchor base and the enclosing purlin in the foundation pit truss according to claim 2, characterized in that, A plurality of vertical reinforcing ribs are vertically arranged between the bottom plate, the end plate and the main support supporting part.

4. The shear-resistant structure of the anchor base and the enclosing purlin in the foundation pit truss according to claim 2, characterized in that, A plurality of muscle plates are vertically arranged between the bottom plate and the cable connecting part.

5. The shear-resistant structure of the anchor base and the enclosing purlin in the foundation pit truss according to claim 4, characterized in that, The tail end of the anchor base is connected with an extension base through bolts.

6. The shear-resistant structure of the anchor base and the enclosing purlin in the foundation pit truss according to claim 4, characterized in that, The extension base is connected with the tail end plate of the anchor base, and a plurality of horizontal reinforcing ribs are arranged between the tail end plate and the adjacent vertical reinforcing ribs. The bottom plates of the anchor base and the extension base are inserted and fixed with the foundation pit enclosing purlin through a plurality of reinforcing anchor rods.

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