An assembled shear-resistant steel pipe concrete supporting structure and method

Abstract

The utility model relates to a kind of assembled shear type steel pipe concrete supporting structure, in particular to a kind of steel pipe concrete structure formwork used in the field of roadway support and its manufacturing method.The formwork includes shear type steel pipe concrete module, module connecting node, transverse support, support orthogonal node.Through the efficient assembly combination of different prefabricated components, can significantly reduce the wet operation engineering in roadway, effectively shorten construction period, form a kind of high safety, economic and practical, simple construction, green environmental protection, efficient stress and with recyclable reusability roadway supporting structure.To solve the cost of traditional supporting mode in deep roadway, construction difficulty, stress performance weak, poor practicality and other key technical problems has very important application value and social and economic value.Suitable for in the field of roadway support, especially in the field of deep roadway support popularization and application.

Description

Technical Field

[0001] This invention belongs to the field of support structures, specifically relating to a prefabricated shear-resistant steel-concrete composite support structure used in roadway and tunnel support and its manufacturing method. Background Technology

[0002] Compared to traditional reinforced concrete, concrete-filled steel tubes (CFST) exhibit superior load-bearing performance. In CFST, the concrete supports the steel tube, effectively delaying buckling deformation and increasing the steel tube's load-bearing capacity. Conversely, the steel tube provides effective circumferential restraint stress to the concrete, significantly enhancing its strength and deformation capacity. Therefore, CFST's compressive and shear bearing capacities are significantly improved, while the improvements in bending and tensile strength are relatively minor.

[0003] In above-ground construction, especially in high-rise or large-span buildings, steel-concrete composite structures have been widely used with excellent results. Currently, in the field of tunnel and roadway support, traditional support methods such as masonry arch support, metal support, and reinforced concrete support are commonly employed. However, with the development of deep tunnels and roadways, higher demands are placed on support structures, and traditional support methods are beginning to exhibit problems such as insufficient load-bearing capacity, excessive space occupation by the support structure, and high material and construction costs.

[0004] While concrete-filled steel tubular (CFST) components have seen some application in roadway and tunnel support, their structural systems often lack proper design, frequently resulting in bending failure, particularly in deep roadways and tunnels where insufficient load-bearing capacity is a significant issue. CFST exhibits relatively weak bending resistance but strong shear resistance. Consequently, bending support structures are inefficient, wasteful of materials, and pose substantial safety hazards. Furthermore, construction often involves on-site concrete pouring, leading to long wet-work periods. Prefabricated structures, on the other hand, offer advantages such as high prefabrication, minimal on-site wet work, high construction efficiency, and low construction costs, achieving good results in above-ground construction. However, their application in underground structures, especially in roadway and tunnel support, is still limited, indicating a vast potential for their development.

[0005] Therefore, developing a prefabricated shear-resistant steel-concrete composite support structure that is efficient in load-bearing capacity, safe and reliable, easy to construct, and low in cost is of great application value for improving the support safety of roadways and tunnels, especially deep roadways and tunnels. Summary of the Invention

[0006] The purpose of this invention is to provide an economical, efficient, safe and reliable prefabricated shear-resistant steel-concrete composite support structure to solve the problems of long construction cycle, low degree of assembly, high cost and insufficient load-bearing capacity of roadways and tunnels, especially deep roadways and tunnels.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A prefabricated shear-resistant steel-concrete composite support structure includes shear-resistant steel-concrete composite modules (1), module connection nodes (2), transverse supports (3), and support orthogonal nodes (4); the shear-resistant steel-concrete composite module (1) includes a flange (11) and a web (12); the module connection node (2) includes a node plate (21) and a connecting bolt (22); the support orthogonal node (4) includes an orthogonal node plate (41) and an orthogonal bolt (42).

[0009] The shear-resistant steel-concrete composite module (1) is characterized in that: the shear-resistant steel-concrete composite module (1) is a prefabricated component, and its shape can be arc-shaped or zigzag-shaped, so as to adapt to different roadway or tunnel shapes. It is composed of a steel-concrete composite flange (11) and a steel-concrete composite web (12). The flange (11) can be made of circular steel-concrete composite, square steel-concrete composite or rectangular steel-concrete composite. The web (12) is formed by welding two steel plates to the flange (11) to form a cavity, and then pouring concrete to form the steel-concrete composite web.

[0010] The module connection node (2) is characterized in that: the shear-resistant steel tube concrete module (1) is connected through the module connection node (2) to form a complete support formwork; depending on the number of shear-resistant steel tube concrete modules (1), when the number exceeds 3, the module connection node (2) adopts a double hinge-web plate node, that is, the two flanges (11) and the web plate (12) are connected by a node plate (21) and a connecting bolt (22) respectively; when the number does not exceed 3, the connection node (2) can adopt a double hinge-web plate node or a single hinge node, that is, the flange (11) and the web plate (12) are connected by the same node plate (21) and a connecting bolt (22).

[0011] The lateral support (3) and the support orthogonal node (4) are characterized in that: the lateral support (3) can be made of steel pipe, steel section or steel pipe concrete; the lateral support (3) and the shear-resistant steel pipe concrete module (1) are connected through the support orthogonal node (4), and the rotation directions of the support orthogonal node (4) are mutually orthogonal on two adjacent support formwork frames.

[0012] The method for fabricating a prefabricated shear-resistant steel-concrete composite support structure is characterized by the following requirements:

[0013] 1) The shear-resistant steel-concrete composite module (1) is prefabricated in the factory. The end of the shear-resistant steel-concrete composite module (1) is pre-welded with node plates (21), and the orthogonal node plates (41) are pre-welded onto the shear-resistant steel-concrete composite module (1).

[0014] 2) After the shear-resistant steel pipe concrete modules (1) are transported to the site in sections, they are connected by connecting bolts (22) to form a support formwork frame;

[0015] 3) Using transverse supports (3), adjacent support frames are connected by orthogonal bolts (42) to form a prefabricated shear-resistant steel pipe concrete support structure.

[0016] The present invention can yield the following benefits:

[0017] (1) The support structure is a fully assembled construction, with all components prefabricated in the factory, ensuring high installation accuracy, quality, and fast construction progress;

[0018] (2) The new shear-resistant section design is adopted, and the design method of steel tube concrete flange and steel tube concrete web is adopted, so that the stress form of the structure is transformed from bending type to shear type, which can significantly improve the bearing capacity of the structure, significantly increase the material utilization rate, and significantly improve the safety of the support.

[0019] (3) The orthogonal support nodes (4) used can ensure that the transverse support (3) is only subjected to axial force and will not generate bending moment on the shear-resistant steel pipe concrete modules (1) at both ends and itself. This can ensure that when rock deformation occurs at only one support formwork and is subjected to external load, it will not affect or damage the adjacent support formwork.

[0020] (4) The support structure is efficient in bearing loads and has good reusability. Components that are not damaged by external loads can be disassembled and reused, which can effectively reduce carbon emissions and save costs.

[0021] (6) This invention is highly efficient in bearing load, safe, green and environmentally friendly, simple and quick to assemble and construct, reusable, and has significant economic benefits. It is suitable for promotion and application in the field of roadway and tunnel support. Attached Figure Description

[0022] Figure 1 This is an overall drawing of a prefabricated shear-resistant steel-concrete composite support structure;

[0023] Figure 2 This is a detailed drawing of the shear-resistant steel-concrete composite module (1);

[0024] Figure 3 This is a detailed structural diagram of the module connection node (2);

[0025] Figure 4 This is a detailed structural diagram of the supporting orthogonal node (4).

[0026] In the diagram: 1-Shear-resistant steel-concrete composite module; 2-Module connection node; 3-Transverse support; 4-Support orthogonal node. Detailed Implementation

[0027] To better understand the present invention, the following description, in conjunction with a typical embodiment, further clarifies the content of the present invention.

[0028] like Figure 1 A prefabricated shear-resistant steel-concrete composite support structure includes shear-resistant steel-concrete composite modules (1), module connection nodes (2), lateral supports (3), and support orthogonal nodes (4). (See attached diagram) Figure 1 The structure consists of four shear-resistant steel-concrete composite modules (1) connected by module connection nodes (2) to form a circular support formwork. Adjacent support formworks are connected by transverse supports (3) and support orthogonal nodes (4) to form a circular prefabricated shear-resistant steel-concrete composite support structure. (See attached diagram) Figure 2 This is a detailed drawing of a shear-resistant steel-concrete composite module (1), which consists of a steel-concrete composite flange (11) and a steel-concrete composite web (12). (Attached) Figure 3 For the detailed construction of the shear-resistant steel-concrete composite module connection node (2), it can be a double-hinged-web node. Figure 3 (a) can also be a single-hinge node. Figure 3 (b). Appendix Figure 4 To support the detailed construction diagram of the orthogonal node (4), the rotation directions of the nodes between two adjacent support formwork frames are orthogonal.

[0029] Shear-resistant steel-concrete composite module (1) is a precast component, shaped like an arc or a broken line, consisting of steel-concrete composite flanges and steel-concrete composite webs. Figure 1 The typical implementation case adopts an arc shape. The flange can be made of circular steel tube concrete, square steel tube concrete, or rectangular steel tube concrete; this typical case uses circular steel tube concrete. The steel tube concrete web is formed by welding two steel plates to the flange to form a cavity, and then pouring concrete to form the steel tube concrete web.

[0030] The shear-resistant steel-concrete composite modules (1) are connected by module connection nodes (2) to form a complete support formwork. Depending on the number of shear-resistant steel-concrete composite modules (1) in a complete support formwork, when the number exceeds 3, the module connection nodes (2) adopt a double-hinged web joint. Figure 3 (a) That is, the two steel-concrete composite flanges are connected by bolted hinge nodes, and the steel-concrete composite web is connected by steel plate and bolt group. When the number does not exceed 3, the module connection node (2) can be a double hinge-web node or a single hinge node. Figure 3(b) That is, the steel-concrete composite flange and the web are connected by the same bolted hinge joint. Figure 1 The typical case in China uses a double-hinged web joint.

[0031] The transverse support (3) can be made of steel pipe, steel section, or steel-concrete composite. The transverse support (3) is connected to the shear-resistant steel-concrete composite module (1) through the support orthogonal node (4). On two adjacent support formwork frames, the rotation directions of the support orthogonal node (4) are mutually orthogonal.

[0032] The method for fabricating the prefabricated shear-resistant circular steel tube concrete support structure is characterized by the following requirements:

[0033] 1) The shear-resistant steel-concrete composite module (1) is prefabricated in the factory. The end of the shear-resistant steel-concrete composite module (1) is pre-welded with node plates (21), and the orthogonal node plates (41) are pre-welded onto the shear-resistant steel-concrete composite module (1).

[0034] 2) After the shear-resistant steel pipe concrete modules (1) are transported to the site in sections, they are connected by connecting bolts (22) to form a support formwork frame;

[0035] 3) Using transverse supports (3), adjacent support frames are connected by orthogonal bolts (42) to form a prefabricated shear-resistant steel pipe concrete support structure.

[0036] The above is a typical embodiment of the present invention, but the implementation of the present invention is not limited thereto. The materials and models of the various components listed in the present invention can be selected according to actual needs, and will not be listed one by one here.

Claims

1. A prefabricated shear-resistant steel-concrete composite support structure, comprising shear-resistant steel-concrete composite modules (1), module connection nodes (2), transverse supports (3), and support orthogonal nodes (4); the shear-resistant steel-concrete composite module (1) includes a flange (11) and a web (12), the module connection node (2) includes a node plate (21) and a connecting bolt (22) for connecting multiple shear-resistant steel-concrete composite modules (1) in a support formwork frame, the support orthogonal node (4) includes an orthogonal node plate (41) and an orthogonal bolt (42), the transverse support (3) is made of steel pipe, steel section or steel-concrete composite, the transverse support (3) is connected to the shear-resistant steel-concrete composite module (1) through the support orthogonal node (4), and the rotation directions of the support orthogonal nodes (4) are mutually orthogonal on two adjacent support formwork frames.

2. The prefabricated shear-resistant steel-concrete composite support structure according to claim 1, characterized in that: The shear-resistant steel-concrete composite module (1) is a precast component with a circular or zigzag shape. It consists of a steel-concrete composite flange (11) and a steel-concrete composite web (12). The flange (11) is made of circular, square, or rectangular steel-concrete composite. The web (12) is formed by welding two steel plates to the flange (11) to form a cavity, and then pouring concrete to form the steel-concrete composite web.

3. The prefabricated shear-resistant steel-concrete composite support structure according to claim 1, characterized in that: According to the number of shear-resistant steel tube concrete modules (1), when the number exceeds 3, the module connection node (2) adopts a double hinge-web plate node, that is, the two flanges (11) and the web plate (12) are connected by a node plate (21) and a connecting bolt (22) respectively; when the number does not exceed 3, the module connection node (2) adopts a double hinge-web plate node, or adopts a single hinge node, that is, the flange (11) and the web plate (12) are connected by the same node plate (21) and connecting bolt (22).

4. A prefabricated shear-resistant steel-concrete composite support structure according to claim 1, characterized in that... The production method includes the following requirements: 1) The shear-resistant steel-concrete composite module (1) is prefabricated in the factory. The end of the shear-resistant steel-concrete composite module (1) is pre-welded with node plates (21), and the orthogonal node plates (41) are pre-welded onto the shear-resistant steel-concrete composite module (1). 2) After the shear-resistant steel pipe concrete modules (1) are transported to the site in sections, they are connected by connecting bolts (22) to form a support formwork frame; 3) Using transverse supports (3), adjacent support frames are connected by orthogonal bolts (42) to form a prefabricated shear-resistant steel pipe concrete support structure.

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