High-strength tunneling roadway side support beam

Abstract

The utility model discloses a kind of high-strength tunneling roadway help part joist, comprising: for being pressed in the metal net outside of roadway help part along the extension direction of tunneling roadway first support rod and second support rod, first support rod and second support rod are mutually parallel and set in alignment;First reinforcing bar and second reinforcing bar are respectively set in the both ends of first support rod, first reinforcing bar, second reinforcing bar are all vertically fixedly connected with first support rod and second support rod;Main reinforcement plate and two side reinforcement plates are all fixedly connected in the middle of first support rod and second support rod, and the plane is all parallel with the axis of first support rod, two side reinforcement plates are located in the two sides of main reinforcement plate facing first reinforcing bar and second reinforcing bar;The center of main reinforcement plate and two side reinforcement plates is provided with anchor hole, anchor hole is used for anchor rod or anchor cable installation. The joist is strong in bending and torsion resistance ability and saves material and construction time in supporting process, improves roadway tunneling efficiency.

Description

Technical Field

[0001] This utility model relates to the field of high-strength side support beams for tunneling roadways, and in particular to a high-strength side support beam for tunneling roadways. Background Technology

[0002] During coal mine roadway excavation, the stability of the roadway walls directly affects operational safety and production efficiency. Currently, the industry commonly uses a combined support method of anchor bolts, anchor cables, support beams, and metal mesh to reinforce the roadway walls. In this support system, the support beams are key components, and their core function is to distribute and evenly transfer the anchoring force of the anchor bolts or anchor cables to the surrounding rock and metal mesh, forming a continuous reinforcing band, thereby effectively controlling the deformation and damage of the surrounding rock.

[0003] During service, roadways are inevitably subject to dynamic pressure. This dynamic pressure mainly originates from mining activities in adjacent working faces, geological stress adjustments, or secondary excavation disturbances within the roadway itself. Under periodic or impact dynamic pressure loads, if the support beams suffer from insufficient structural strength and stability, they may frequently undergo plastic bending or even torsional deformation. Once the support beams deform, the preload of the anchor bolts or cables on them will rapidly decrease, compromising the integrity of the entire support system and significantly reducing its strength.

[0004] In existing technologies, the structure of mainstream support beams is as follows: Figure 1 As shown, the support beam consists of two parallel supporting round steel bars, each 16mm in diameter and 2800mm in length, and four pairs of reinforcing round steel bars welded vertically in the middle. Anchor holes are formed between the two round steel bars in each pair of reinforcing round steel bars. The current problems with this type of support beam are: insufficient bending stiffness, making it prone to deformation under cyclic or impact dynamic pressure loads; and the need for four anchor rods or cables to support each support beam during use, increasing the cost of support materials and the amount of work required. Utility Model Content

[0005] Therefore, it is necessary to provide a high-strength tunnel side support beam that addresses the aforementioned technical problems, possesses strong bending and torsional resistance, saves materials and construction time during the support process, and improves tunnel excavation efficiency.

[0006] This utility model provides a high-strength tunnel sidewall support beam, comprising: The first and second support rods are used to press against the outside of the metal mesh on the sidewall of the tunnel along the extension direction of the tunnel. The first and second support rods are parallel and aligned with each other. The first reinforcing rod and the second reinforcing rod are respectively disposed at both ends of the first support rod, and the first reinforcing rod and the second reinforcing rod are both fixedly connected to the first support rod and the second support rod perpendicularly; The main reinforcing plate and the two side reinforcing plates are all fixedly connected between the first support rod and the second support rod, and the plane in which they are located is parallel to the axis of the first support rod. The two side reinforcing plates are located on both sides of the main reinforcing plate facing the first and second reinforcing rods. Anchor holes are provided in the center of the main reinforcing plate and the two side reinforcing plates. The anchor holes are used for the installation of anchor rods or anchor cables to fix the entire support beam to the side of the tunnel.

[0007] In one embodiment, the width of the main reinforcing plate and the two side reinforcing plates are equal, and the length of the main reinforcing plate is greater than the length of the side reinforcing plates; The anchor holes of the main reinforcing plate are located at the middle of the first or second support rod along its length.

[0008] In one embodiment, the first support rod, the second support rod, the first reinforcing rod, and the second reinforcing rod are all made of round steel with a diameter of 20 mm.

[0009] In one embodiment, the first support rod, the second support rod, the first reinforcing rod, and the second reinforcing rod are all made of I-beams of equal height.

[0010] In one embodiment, the main reinforcing plate and the two side reinforcing plates have the same thickness and are all less than the height of the first support rod relative to the side.

[0011] In one embodiment, the length of the first support rod is 2800mm, the lengths of the first reinforcing rod and the second reinforcing rod are both 200mm, the length of the main reinforcing plate is 800mm, the length of the side reinforcing plate is 500mm, the distance between the side reinforcing plate and the main reinforcing plate is 400mm, and the thickness of the main reinforcing plate is 10mm.

[0012] The beneficial effects of this utility model are: (1) This utility model adopts a main frame composed of double parallel support rods and end reinforcement rods, and combines a planar main reinforcement plate and side reinforcement plate to form a stable three-dimensional truss structure, which greatly improves the overall bending and torsional resistance of the support beam and can effectively resist the influence of roadway dynamic pressure.

[0013] (2) This utility model optimizes the original four-anchor support to three-anchor support. The three-anchor support is achieved through three anchor holes on the main reinforcing plate and two side reinforcing plates. Under the premise of ensuring or even improving the support strength, the number of anchors or anchor cables required for a single row of beams is reduced, saving support materials and construction time, and improving the single-shift tunneling efficiency.

[0014] (3) By combining the main reinforcing plate and the side reinforcing plate with the frame rod, this utility model enhances the constraint and coverage area of ​​the metal mesh, so that the metal mesh can fit more tightly against the roadway side, forming a strong integrated reinforced surface layer, effectively preventing the outflow of crushed coal and gangue behind the mesh, and improving the safety and reliability of the support. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a support beam in the prior art; Figure 2 A schematic diagram of the structure of a high-strength tunnel side support beam when the support rod is round steel, provided for an embodiment of this utility model; Figure 3 A schematic diagram of the structure of a high-strength tunnel side support beam when the support rod is an I-beam, as provided in the embodiments of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 100, first support rod; 200, second support rod; 300, first reinforcing rod; 400, second reinforcing rod; 500, main reinforcing plate; 600, side reinforcing plate; 700, anchor hole. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] It should be noted that in the description of this utility model, "upper," "lower," "top," "bottom," and orientation or positional relationship are based on the appendix. Figure 2 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In one embodiment, such as Figure 2 As shown, the high-strength tunnel side support beam of this embodiment is composed of a first support rod 100, a second support rod 200, a first reinforcing rod 300, a second reinforcing rod 400, a main reinforcing plate 500, and two side reinforcing plates 600.

[0020] The first support rod 100 and the second support rod 200 are arranged parallel to each other and aligned, and are used to press against the outside of the metal mesh of the roadway sidewall along the extension direction of the tunnel. During beam support, the support rods are arranged along the tunnel excavation direction. The first reinforcing rod 300 and the second reinforcing rod 400 are respectively disposed at both ends of the first support rod 100, and both the first reinforcing rod 300 and the second reinforcing rod 400 are perpendicularly fixedly connected to the first support rod 100 and the second support rod 200. In this embodiment, the reinforcing rods and support rods are welded together to form a sturdy rectangular frame. The first support rod 100, the second support rod 200, the first reinforcing rod 300, and the second reinforcing rod 400 are all made of round steel with a diameter of 20mm.

[0021] Inside the rectangular frame, the main reinforcing plate 500 and the two side reinforcing plates 600 are fixedly connected between the first support rod 100 and the second support rod 200, and the planes on which they are located are parallel to the axis of the first support rod 100. The two side reinforcing plates 600 are located on both sides of the main reinforcing plate 500 facing the first reinforcing rod 300 and the second reinforcing rod 400.

[0022] Anchor holes 700 are provided in the center of the main reinforcing plate 500 and the two side reinforcing plates 600. The anchor holes 700 are used for installing anchor bolts or anchor cables to fix the entire support beam to the sidewall of the tunnel. By using the three anchor holes 700 on the main reinforcing plate 500 and the two side reinforcing plates 600, the original four anchor holes 700 of the support beam are replaced. While ensuring or even improving the support strength, the number of anchor bolts required for a single row of support beams is reduced, saving support materials and construction time, and improving the single-shift tunneling efficiency.

[0023] This embodiment uses a main frame composed of double parallel support rods and end reinforcement rods, combined with a planar main reinforcement plate 500 and side reinforcement plate 600, to form a stable three-dimensional truss structure, which greatly improves the overall bending and torsional resistance of the support beam and can effectively resist the influence of roadway dynamic pressure.

[0024] In one embodiment, the main reinforcing plate 500 and the two side reinforcing plates 600 have equal widths, and the length of the main reinforcing plate 500 is greater than the length of the side reinforcing plates 600; the anchor hole 700 of the main reinforcing plate 500 is located at the middle of the first support rod 100 or the second support rod 200 along its length direction. The thickness of the main reinforcing plate 500 and the two side reinforcing plates 600 are equal, and both are less than the height of the first support rod 100 relative to the side.

[0025] The reinforcing plate not only enhances the overall strength of the support beam, but also improves the covering effect on the metal mesh, allowing the metal mesh to fit more tightly against the tunnel wall.

[0026] like Figure 3As shown, in one embodiment, the first support rod 100, the second support rod 200, the first reinforcing rod 300, and the second reinforcing rod 400 are all made of I-beams of equal height. When subjected to the same amount of surrounding rock pressure transmitted from the sidewall of the roadway, the bending deformation of the support beam made of I-beams will be much smaller than that of the round steel support beam. The support beam made of I-beams has stronger bending and torsional resistance.

[0027] In one specific embodiment, the lengths of the first support rod 100 and the second support rod 200 are 2800 mm, the lengths of the first reinforcing rod 300 and the second reinforcing rod 400 are both 200 mm, the length of the main reinforcing plate 500 is 800 mm, the length of the side reinforcing plate 600 is 500 mm, the distance between the side reinforcing plate 600 and the main reinforcing plate 500 is 400 mm, and the thickness of the main reinforcing plate 500 and the two side reinforcing plates 600 is 10 mm. When using the support beams of this embodiment for roadway excavation support, the single-shift support efficiency is effectively improved, the single-shift advance is increased from 3 m to 4 m, and the displacement variation of the roadway sidewalls under pressure is reduced from 1500 mm to 1000 mm.

[0028] In actual installation, the metal mesh is first laid over the tunnel wall, and then the support beam is pressed onto the outside of the metal mesh, ensuring that the frame and reinforcing plate of the support beam are tightly against the mesh surface. Subsequently, three anchor bolts are driven into and anchored in the rock mass of the tunnel wall through the anchor holes 700 on the main reinforcing plate 500 and the two side reinforcing plates 600, respectively, and finally the nuts are tightened. The three reinforcing plates distribute the anchoring force of the anchor bolts and, through their large surface area and the entire frame, evenly transfer it to the metal mesh and the surrounding rock behind it, forming a high-strength, high-stability support system.

[0029] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A high-strength tunnel side support beam, characterized in that, include: The first support rod (100) and the second support rod (200) are used to press against the outside of the metal mesh on the sidewall of the tunnel along the extension direction of the tunnel. The first support rod (100) and the second support rod (200) are parallel to each other and aligned. The first reinforcing rod (300) and the second reinforcing rod (400) are respectively disposed at both ends of the first support rod (100), and the first reinforcing rod (300) and the second reinforcing rod (400) are both vertically fixedly connected to the first support rod (100) and the second support rod (200); The main reinforcing plate (500) and the two side reinforcing plates (600) are fixedly connected between the first support rod (100) and the second support rod (200), and the plane in which they are located is parallel to the axis of the first support rod (100). The two side reinforcing plates (600) are located on both sides of the main reinforcing plate (500) facing the first reinforcing rod (300) and the second reinforcing rod (400). Anchor holes (700) are provided in the center of the main reinforcing plate (500) and the two side reinforcing plates (600). The anchor holes (700) are used for the installation of anchor rods or anchor cables to fix the entire support beam to the side of the tunnel.

2. The high-strength tunnel side support beam according to claim 1, characterized in that, The main reinforcing plate (500) and the two side reinforcing plates (600) have the same width, and the length of the main reinforcing plate (500) is greater than the length of the side reinforcing plates (600). The anchor hole (700) of the main reinforcing plate (500) is located at the middle of the first support rod (100) or the second support rod (200) along its length.

3. The high-strength tunnel side support beam according to claim 2, characterized in that, The first support rod (100), the second support rod (200), the first reinforcing rod (300), and the second reinforcing rod (400) are all made of round steel with a diameter of 20 mm.

4. The high-strength tunnel side support beam according to claim 2, characterized in that, The first support rod (100), the second support rod (200), the first reinforcing rod (300), and the second reinforcing rod (400) are all made of I-beams of equal height.

5. The high-strength tunnel side support beam according to claim 3 or 4, characterized in that, The thickness of the main reinforcing plate (500) and the two side reinforcing plates (600) is equal, and both are less than the height of the first support rod (100) relative to the side.

6. The high-strength tunnel side support beam according to claim 5, characterized in that, The length of the first support rod (100) is 2800mm, the length of the first reinforcing rod (300) and the second reinforcing rod (400) is 200mm, the length of the main reinforcing plate (500) is 800mm, the length of the side reinforcing plate (600) is 500mm, the distance between the side reinforcing plate (600) and the main reinforcing plate (500) is 400mm, and the thickness of the main reinforcing plate (500) is 10mm.

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