Combined spatial support device of steel tube concrete arch with torsion shear bolt group connection bending tie rod

Abstract

The present invention discloses a torsion shear bolt group connected bending tie rod steel tube concrete arch joint space support device, comprising: a plurality of parallel arranged steel tube assemblies, each of the steel tube assemblies comprises a plurality of mutually connected steel tube fittings, each of the steel tube fittings is provided with flanges at both ends, and the connection method of each two of the steel tube fittings is that the flanges are butt-jointed and fastened with fasteners, and the plurality of parallel arranged steel tube assemblies are connected and fixed by transverse connectors, and the connection and fixing method of the transverse connectors connecting the plurality of parallel arranged steel tube assemblies is that the transverse connectors are connected and fixed to the flanges of the plurality of parallel arranged steel tube assemblies. The torsion shear bolt group connected bending tie rod steel tube concrete arch joint space support device of the present invention has good overall structural stability, good mechanical properties, convenient construction and low cost, good economic benefits, and is easy to promote and use.

Description

Technical Field

[0001] The invention relates to a combined space supporting device for a torsion-shear bolt group-connected bending-resistant tie rod steel tube concrete arch. Background Art

[0002] With the gradual depletion of shallow resources, the depth of the tunnel gradually increases. Affected by dynamic pressure disturbance and weak surrounding rock, the deformation of the surrounding rock also increases, the stability of the tunnel is difficult to control, and the support difficulty of deep well tunnels with dynamic pressure and soft rock increases. In terms of deep well tunnel support, there are anchor support technology, shed support technology, grouting reinforcement technology, and combined support technology. Among them, the combined support method is the main method of tunnel support at present. However, according to the different surrounding rock states and geological conditions of the tunnel, the selected support method should also be different. U-shaped steel pipe assembly and flange-connected steel pipe concrete arch joint space support device are two widely used support technologies as the main body of external support in the joint support. The latter gives full play to the mechanical advantages of steel and concrete materials and has good application prospects; however, the traditional flange-connected steel pipe concrete arch joint space support device has backward casing connection technology, it is difficult to ensure the quality of underground concrete engineering construction, poor spatial mechanical properties, long construction period and high support cost, which makes it only exist as an alternative support scheme. Summary of the invention

[0003] The present invention provides a torsion shear bolt group connected bending tie rod steel tube concrete arch joint space support device to solve the technical problems in the prior art that the traditional flange-based steel tube concrete arch joint space support device casing connection technology is backward, the quality of underground concrete engineering construction is difficult to ensure, the spatial mechanical properties are poor, the construction period is long and the support cost is high.

[0004] A torsional shear bolt group connected bending tie rod steel tube concrete arch joint space support device comprises: a plurality of parallel arranged steel tube assemblies, each of the steel tube assemblies comprises a plurality of mutually connected steel tube fittings, both ends of each of the steel tube fittings are provided with flanges, the connection method of every two of the steel tube fittings is that the flanges are butt-jointed and then fastened with fasteners, the plurality of parallel arranged steel tube assemblies are connected and fixed by transverse connectors, and the connection and fixing method of the transverse connectors connecting the plurality of parallel arranged steel tube assemblies is that the transverse connectors are connected and fixed to the flanges of the plurality of parallel arranged steel tube assemblies.

[0005] Preferably, the transverse connector is provided with a plurality of connection fixing portions, and each connection fixing portion is configured to be connected to each of a plurality of parallelly arranged steel pipe assemblies.

[0006] Preferably, each of the steel pipe assemblies includes a top steel pipe fitting, a side steel pipe fitting, and a bottom steel pipe fitting, wherein the top steel pipe fitting further includes two side arc-shaped fittings and a top arc-shaped fitting, the two ends of the bottom steel pipe fitting are respectively connected to one end of the two side steel pipe fittings through the flange plates, the other ends of the two side steel pipe fittings are connected to the side arc-shaped fittings through the flange plates, and the two ends of the top arc-shaped fitting are respectively connected to the other ends of the two side arc-shaped fittings through flange plates.

[0007] Preferably, the transverse connector connects the plurality of steel pipe assemblies in a direction perpendicular to a parallel direction of the plurality of steel pipe assemblies.

[0008] Preferably, the fastener is configured as a bolt.

[0009] Preferably, the transverse connecting member is configured as an I-beam chain rod.

[0010] Preferably, the cross-sectional shape of the steel pipe assembly is set to be one of a circular shape, an elliptical shape, a horseshoe shape, and a shallow-bottomed circular shape.

[0011] The present invention also provides a tunnel space support device based on the above-mentioned device, which also includes: a concrete spraying layer and a flexible pressure relief layer; the concrete spraying layer is arranged on the outer layer of the joint space support device based on the flange-connected steel pipe concrete arch, which wraps the entire top of the joint space support device based on the flange-connected steel pipe concrete arch, and the flexible pressure relief layer is arranged between the concrete spraying layer and the steel pipe assembly, and the flexible pressure relief layer is configured to be a filling buffer.

[0012] Preferably, the outer layer of the concrete spraying layer is also provided with a sealing layer.

[0013] Preferably, the concrete spraying layer is further provided with hollow anchor rods, and the hollow anchor rods are arranged at intervals along the circumferential direction of the concrete spraying layer.

[0014] The torsion shear bolt group-connected bending tie rod steel tube concrete arch combined space support device of the present invention has good overall structural stability, good mechanical properties, convenient construction, low cost, good economic benefits, and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a combined space support device of a torsional shear bolt group connected with a bending tie rod steel tube concrete arch according to the present invention;

[0017] Figure 2 This is a cross-sectional view of a combined space support device for a torsion shear bolt group connected to a bending tie rod steel tube concrete arch according to the present invention;

[0018] Figure 3 It is a force diagram of the combined space support device of the torsion shear bolt group connected with the bending tie rod steel tube concrete arch of the present invention;

[0019] Figure 4 It is a schematic diagram of the structure of the steel pipe fittings in the combined space support device of the bending-resistant tie-bar steel tube concrete arch connected with the torsion shear bolt group of the present invention;

[0020] Figure 5 It is a schematic diagram of the structure of the transverse connector in the combined space support device of the torsion shear bolt group connecting the bending tie steel tube concrete arch of the present invention;

[0021] Figure 6 It is a schematic diagram of another embodiment of the combined space support device of the torsion shear bolt group connected with the bending tie rod steel tube concrete arch of the present invention;

[0022] Figure 7 The invention discloses a tunnel space support device based on the torsion shear bolt group connected with the bending tie rod steel tube concrete arch combined space support device. DETAILED DESCRIPTION

[0023] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0024] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a list of equivalent or similar features.

[0025] like Figure 1-6 As shown, the torsion shear bolt group connected bending tie steel tube concrete arch joint space support device 10 of the present invention includes a plurality of parallel arranged steel tube assemblies 11, each steel tube assembly 11 includes a plurality of steel tube fittings (11a, 11b, 11c), and flanges 14 are arranged at both ends of each steel tube fitting (11a or 11b or 11c). The connection method of every two steel tube fittings is that the flanges 14 are butt-jointed and then fastened by fasteners 13. The plurality of parallel arranged steel tube assemblies 11 are connected and fixed by transverse connectors 12. The connection and fixing method of the transverse connectors 12 connecting the plurality of parallel arranged steel tube assemblies 11 is that the transverse connectors 12 are connected and fixed to the flanges 14 of the plurality of steel tube assemblies 11.

[0026] In this embodiment, a plurality of connection fixing portions (12a, 12b, 12c) are provided on the transverse connecting member 12, and each connection fixing portion is configured to be connected to each of a plurality of parallelly arranged steel pipe assemblies.

[0027] In this embodiment, each steel pipe assembly 11 includes a top steel pipe member 11a, a side steel pipe member 11b, and a bottom steel pipe member 11c, wherein the top steel pipe member 11a further includes two side arc-shaped members 11a1, 11a3, and a top arc-shaped member 11a2, and both ends of the bottom steel pipe member 11c are respectively connected to one end of the two side steel pipe members 11b through a flange 13, and the other ends of the two side steel pipe members 11b are connected to the side arc-shaped members 11a1 / 11a3 through a flange 13, and both ends of the top arc-shaped member 11a2 are respectively connected to the other ends of the two side arc-shaped members 11a1, 11a3 through a flange. This method is convenient to assemble and the structure is stable.

[0028] In this embodiment, the transverse connector 12 connects the multiple steel pipe assemblies along a direction perpendicular to the parallel direction of the multiple steel pipe assemblies.

[0029] In this embodiment, the fastener 13 is configured as a bolt.

[0030] In this embodiment, the transverse connecting member 12 is configured as an I-beam chain rod.

[0031] In this embodiment, the cross-sectional shape of the flange-connected steel tube concrete arch combined space support device 10 is designed to be one of a circle, an ellipse, a horseshoe, and a shallow bottom arch circle. Generally, the circle and the ellipse are suitable for soft rock tunnels with severe surrounding rock pressure; the horseshoe and the shallow bottom arch circle are suitable for deep well tunnels.

[0032] An assembly method of the present embodiment is: the flanges 14 at the ends of two different steel pipe parts of the same steel pipe assembly are aligned with each other, and then a connecting and fixing portion (12a) of the transverse connecting member 12 is clamped between the two flanges 14 so that the three are aligned, a plurality of bolt holes are provided on the flange 14, and a bolt hole is provided on the transverse connecting member 12. The three are then aligned and fastened using a plurality of bolts 13, and then the steel pipe parts of the parallel steel pipe assembly are connected and fixed with other connecting and fixing portions (12b) in accordance with the above method, and subsequent parallel steel pipe assemblies can be connected in a similar manner in sequence. Those skilled in the art should understand that the above assembly method is to facilitate the connection relationship of each component, and its assembly can also adopt other steps and methods, as long as the connection and fixing parts of the components are as shown in the figure after the assembly is completed.

[0033] In this embodiment, the steel pipe is hollow, and the connecting and fixing portion of the transverse connecting member 12 is provided with an opening, so that the entire steel pipe assembly can be filled with concrete.

[0034] like Figure 1As shown, in the flange-connected steel tube concrete arch joint space support device 10 of the present invention, multiple parallel steel tube assemblies 11 are set as three groups of one unit, that is, three steel tube assemblies 11 are connected by a group of transverse connectors 12, so the three steel tube assemblies 11 can form a basic space unit. Compared with the previous support method, the support method can increase the distance between two adjacent steel tube assemblies to 1 to 2 times under the same support reaction force conditions, and the steel tube assemblies 11 are connected by I-beams, which can increase the overall stability of the flange-connected steel tube concrete arch joint space support device 10. In addition, it should be noted that Figure 6 As shown, in another embodiment of the present invention, a multiple of three can be set as one unit.

[0035] It should be noted in this embodiment that the flange 14 and each individual steel pipe fitting can be integrally formed, or the flange 14 can be welded to the steel pipe fitting after the individual steel pipe fitting is formed. The flange 14 includes a connecting plate 14a and a reinforcing rib 14b. The diameter of the connecting plate 14a is larger than the diameter of the steel pipe fitting. The reinforcing rib connects the connecting plate 14a and the surface of the steel pipe fitting for reinforcement.

[0036] like Figure 3 As shown, when the torsion shear bolt group of the present invention is connected to the bending tie steel tube concrete arch combined space support device, each steel tube assembly is connected by an I-beam chain rod, and the I-beam chain rod has a strong bending resistance; at the same time, its greatest advantage is that when a middle steel tube assembly is subjected to local pressure or the pressure on the steel tube assembly is too high relative to other steel tube assemblies, the bending moment on the steel tube assembly can be transmitted to the adjacent steel tube assembly through the torsion shear bolt group on the flange, thereby increasing the coordinated force performance between the steel tube assemblies, thereby reducing the force on the steel tube assembly, avoiding concentrated deformation and damage of the steel tube assembly, and optimizing the spatial force performance of the support structure. Therefore, compared with traditional steel tube arch steel tube assemblies, this design can increase the distance between adjacent steel tube assemblies, reduce the number of steel tube assemblies, and reduce costs.

[0037] The torsional shear bolt group of the present invention connects the steel pipe parts of the single steel pipe assembly of the bending tie rod steel pipe concrete arch joint space support device by using flanges for connection, and the parallel steel pipe assemblies are connected by transverse connectors. The transverse connectors connect multiple parallel steel pipe assemblies through connecting flanges. Bending moments can be transmitted between the steel pipe assemblies, which solves the problem of damage to the steel pipe assemblies caused by excessive local pressure. In addition, the transverse connectors can effectively control the inward deformation of the side and bottom of the steel pipe assembly, prevent the steel pipe assembly from tilting in the length direction of the tunnel, improve the overall stability of the steel pipe assembly, and reduce maintenance workload and maintenance costs. At the same time, the flange also has better stability and structural strength, and the error caused by its connection is also smaller.

[0038] In addition, the flange-connected steel tube concrete arch joint space support device can be prefabricated in the factory, which not only solves the problem of weak steel tube openings, but also simplifies the on-site construction procedures and construction difficulty, saves on-site construction time, and is conducive to the development of an assembleable and disassembled, fast and convenient flange-connected steel tube concrete arch joint space support device, forming a modular construction process and prefabricated support technology.

[0039] Furthermore, compared with the existing U-shaped steel pipe assembly, the steel pipe assembly designed in the present invention has a high support reaction force; it can not only effectively control the deformation of the steel pipe assembly, but also reduce the cost and fully improve the economic benefits.

[0040] In summary, the combined spatial support device of the torsion shear bolt group connected with the bending tie rod steel tube concrete arch of the present invention has good overall structural stability, good mechanical properties, convenient construction and low cost, good economic benefits, and is easy to promote and use.

[0041] like Figure 7 As shown, the present invention also provides a tunnel space support device based on the device, which also includes: a concrete spraying layer 20 and a flexible pressure relief layer 30.

[0042] The concrete spraying layer 20 is arranged on the outer layer of the flange-connected steel tube concrete arch combined space support device 10, which wraps the entire top of the flange-connected steel tube concrete arch combined space support device 10. The actual construction is to spray a layer of concrete spraying layer immediately after the tunnel is excavated, which can prevent the surrounding rock from interacting with air and water, and can also fill in concave and level it to eliminate stress concentration.

[0043] The flexible pressure relief layer 30 is arranged between the concrete spray layer and the steel pipe assembly. The flexible pressure relief layer 30 is arranged to be filled with a buffer, so that when the surrounding rock pressure increases to a certain extent, the filling body is broken, the surrounding rock deformation space is made, and the surrounding rock pressure is released. In this embodiment, the flexible pressure relief layer 30 includes a galvanized steel wire mesh bag and a filling material. The galvanized steel wire can prevent the steel wire from rusting, and the filling material is set to coal gangue and wood.

[0044] In this embodiment, a sealing layer 40 is also provided on the outer layer of the concrete spray layer 20. The sealing layer 40 is configured as a waterproof roll, a waterproof coating or a composite waterproof material of the two, such as a synthetic polymer waterproof roll, a polymer modified asphalt waterproof roll, a synthetic polymer waterproof coating, etc. It is located between the surrounding rock and the concrete spray layer, which can prevent the surrounding rock from absorbing water, swelling and weathering, thereby improving safety.

[0045] In this embodiment, the concrete spraying layer 20 is also provided with hollow anchor rods 50, which are arranged at intervals along the circumferential direction of the concrete spraying layer 20. Grouting is injected into the surrounding rock through the hollow anchor rods 50 to consolidate it with the rock mass to form an integral structure, thereby improving the bearing capacity of the surrounding rock itself.

[0046] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A combined space support device for a torsion shear bolt group connected with a bending tie rod steel tube concrete arch, characterized in that: include: A plurality of parallel arranged steel pipe assemblies, each of the steel pipe assemblies comprises a plurality of mutually connected steel pipe fittings, flanges are arranged at both ends of each of the steel pipe fittings, and the connection method of each two steel pipe fittings is that the flanges are butt-jointed and fastened with fasteners, and the plurality of parallel arranged steel pipe assemblies are connected and fixed by transverse connectors, and the transverse connectors are arranged as I-beam chain rods, and the connection and fixing method of the transverse connectors connecting the plurality of parallel arranged steel pipe assemblies is that the transverse connectors are connected and fixed to the flanges of the plurality of parallel arranged steel pipe assemblies.

2. The torsion shear bolt group connected bending tie rod steel tube concrete arch joint space support device according to claim 1 is characterized in that: The transverse connecting member is provided with a plurality of connecting and fixing parts, each of which is arranged to be connected to each of a plurality of parallel arranged steel pipe assemblies.

3. The torsion shear bolt group connected bending tie rod steel tube concrete arch joint space support device according to claim 2 is characterized in that: Each of the steel pipe assemblies includes a top steel pipe fitting, a side steel pipe fitting, and a bottom steel pipe fitting, wherein the top steel pipe fitting includes two side arc-shaped fittings and a top arc-shaped fitting, the two ends of the bottom steel pipe fitting are respectively connected to one end of the two side steel pipe fittings through the flange plates, the other ends of the two side steel pipe fittings are connected to the side arc-shaped fittings through the flange plates, and the two ends of the top arc-shaped fitting are respectively connected to the other ends of the two side arc-shaped fittings through the flange plates.

4. The torsion shear bolt group connected bending tie rod steel tube concrete arch joint space support device according to claim 3 is characterized in that: The transverse connecting member connects the plurality of steel pipe assemblies along a direction perpendicular to the parallel direction of the plurality of steel pipe assemblies.

5. The torsion shear bolt group connected bending tie rod steel tube concrete arch joint space support device according to claim 4 is characterized in that: The fastener is configured as a bolt.

6. The torsion shear bolt group connected bending tie rod steel tube concrete arch joint space support device according to claim 1 is characterized in that: The cross-sectional shape of the steel pipe assembly is set to be one of a circle, an ellipse, a horseshoe, and a shallow bottom arch circle.

7. A tunnel space support device based on the device according to any one of claims 1 to 6, characterized in that: Also includes: Concrete spraying layer and flexible pressure relief layer; the concrete spraying layer is arranged on the outer layer of the joint space support device of steel pipe concrete arch connected based on flange, which wraps the top of the entire joint space support device of steel pipe concrete arch connected based on flange, and the flexible pressure relief layer is arranged between the concrete spraying layer and the steel pipe assembly, and the flexible pressure relief layer is arranged to be filled with a buffer.

8. A tunnel space support device according to claim 7, characterized in that: The outer layer of the concrete spraying layer is also provided with a sealing layer.

9. A tunnel space support device according to claim 8, characterized in that: The concrete spraying layer is also provided with hollow anchor rods, and the hollow anchor rods are arranged at intervals along the circumferential direction of the concrete spraying layer.

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