Tunnel steel arch auxiliary hoisting method

Abstract

This invention discloses an auxiliary hoisting method for tunnel steel arch frames, comprising: placing several steel arch frames side by side in the slot of an inverted U-shaped fixing frame; winding a hoisting rope around a pulley block, connecting one end of the hoisting rope to a tensioning device, and installing a connecting ring on the other end of the hoisting rope, so that the end of the hoisting rope with the connecting ring passes through the gap between the steel arch frames and extends to the bottom of the steel arch frames; passing two steel pipes through the corresponding connecting rings at both ends of the fixing frame, and installing annular baffles at both ends of the steel pipes; connecting the hoisting device to the tensioning device, lifting the tensioning device, and tightening the hoisting rope, so that the steel pipes and the fixing frame clamp the steel arch frames between them; removing the annular baffles at both ends of the steel pipes, pulling the steel pipes out of the connecting rings, and removing the connecting rings and the hoisting rope from the gap between the steel arch frames; until all the steel arch frames are hoisted to the designated position. The advantages of this invention are: hoisting requires no welding, operation is simple, and it can be reused.

Description

Technical Field

[0001] This invention belongs to the technical field of tunnel steel arch frame hoisting, and specifically relates to an auxiliary hoisting method for tunnel steel arch frames. Background Technology

[0002] I-beam arch frames are a type of support material that is used extensively in tunnel surrounding rock support. Due to the large self-weight and certain curvature of the steel arch frames, hoisting and transportation are inconvenient. Currently, when transporting steel arch frames from the processing plant to the construction site, they are mostly hoisted in bundles after being tied with thin steel bars. Because the shape of the steel arch frames is irregular, in order to secure them, on-site workers often weld the thin steel bars used for binding to the surface of the steel arch frames. Although this improves the stability during hoisting, it is difficult to operate, and welding has a certain impact on the arch frame structure, and loading and unloading are also very inconvenient. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the prior art by providing an auxiliary hoisting method for tunnel steel arch frames. By tightening the hoisting ropes with a tensioning device, the steel pipe and the fixing frame clamp the steel arch frame between them, thereby fixing the steel arch frame and avoiding the adverse effects of welding on the steel arch frame, thus achieving reliable hoisting of the steel arch frame.

[0004] The objective of this invention is achieved through the following technical solutions: A method for auxiliary hoisting of a tunnel steel arch frame, characterized in that the hoisting method includes the following steps: (S1) Several steel arch frames are placed side by side in the slot of an inverted U-shaped fixed frame, wherein several pulley sets are provided at both ends of the top of the fixed frame; (S2) Wrap the hoisting rope around the pulley block, connect one end of the hoisting rope to the tensioning device, and install a connecting ring on the other end of the hoisting rope so that the end of the hoisting rope with the connecting ring passes through the gap between the steel arch frames and extends to the bottom of the steel arch frame. (S3) Pass the two steel pipes through the connecting rings at both ends of the fixing frame respectively, and install annular baffles at both ends of the steel pipes; (S4) Connect the hoisting device to the tensioning device, hoist the tensioning device, and tighten the hoisting rope so that the steel pipe and the fixing frame clamp the steel arch frame between them to fix the steel arch frame. (S5) After hoisting the steel arch frame to the designated position, remove the annular baffles at both ends of the steel pipe, pull the steel pipe out of the connecting ring, and take out the connecting ring and the hoisting rope from the gap between the steel arch frame; (S6) Repeat steps S1 to S5 until all the steel arches are hoisted to the designated position.

[0005] The fixing frame includes a top plate and two side plates. Both the top plate and the side plates are arc-shaped. The arc surface of the top plate is adapted to the arc surface of the top of the steel arch frame, and the arc surface of the side plates is adapted to the arc surface of the side of the steel arch frame.

[0006] The tensioning device includes a rectangular frame and an inverted V-shaped suspension rope. The upper part of the rectangular frame is connected to the inverted V-shaped suspension rope, and the lower part is connected to the other end of the suspension rope.

[0007] The top of the fixed frame is provided with three pulley groups at each end, and each pulley group consists of two pulleys.

[0008] The two pulleys are a first pulley located near the outermost end of the top of the fixed frame and a second pulley located away from the outermost end of the top of the fixed frame, and the suspension rope is wrapped around the upper side of the first pulley and the lower side of the second pulley, respectively.

[0009] The inner diameter of the connecting ring is larger than the outer diameter of the steel pipe.

[0010] The advantages of this invention are: no welding is required for hoisting, the operation is simple, and it can be reused repeatedly; by tightening the hoisting rope through the tensioning device, the steel pipe and the fixed frame clamp the steel arch frame between them, thereby fixing the steel arch frame and realizing the reliable hoisting of the steel arch frame. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the hoisting device in this invention; Figure 2 This is a schematic diagram of the operation of hoisting the steel arch frame according to the present invention. Implementation

[0012] The features and other related features of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate understanding by those skilled in the art: like Figure 1-2 As shown in the figure, the markings represent: 1. Fixed frame, 2. Pulley block, 3. Suspension rope, 4. Steel pipe, 5. Connecting ring, 6. Circular baffle, 7. Rectangular frame, 8. Inverted V-shaped suspension rope, 9. Steel arch frame.

[0013] Example: Figure 1-2 As shown, this embodiment specifically relates to an auxiliary hoisting method for a tunnel steel arch frame, used for hoisting the steel arch frame 9. The hoisting method specifically includes the following steps: (S1) Place several steel arch frames 9 side by side in the slot of the inverted U-shaped fixed frame 1.

[0014] The fixing frame 1 includes a top plate and two side plates, both of which are arc-shaped. The arc surface of the top plate matches the arc surface of the top of the steel arch frame 6, and the arc surface of the side plates matches the arc surface of the side of the steel arch frame 9. The side plates prevent the steel arch frame 9 from moving laterally during hoisting. In this embodiment, the slot of the fixing frame 1 can accommodate four steel arch frames 9, allowing four steel arch frames 9 to be hoisted simultaneously. Of course, the size of the slot of the fixing frame 1 can be increased or decreased according to the actual situation to hoist more or fewer steel arch frames 9. Several pulley groups 2 are provided at both ends of the top of the fixing frame 1. In this embodiment, three pulley groups 2 are provided at each end of the top of the fixing frame 1. Each pulley group 2 consists of two pulleys, namely a first pulley located near the outermost end of the top plate of the fixing frame 1 and a second pulley located away from the outermost end of the top plate of the fixing frame 1.

[0015] (S2) Wrap the hoisting rope 3 around the pulley block 2, connect one end of the hoisting rope 3 to the tensioning device, and install the connecting ring 5 on the other end of the hoisting rope 3 so that the end of the hoisting rope 3 with the connecting ring 5 passes through the gap between the steel arch frames 9 and extends to the bottom of the steel arch frame 9.

[0016] The number of suspension ropes 3 corresponds to the number of pulley blocks 2, that is, each pulley block 2 corresponds to one suspension rope 3, each suspension rope 3 corresponds to a connecting ring 6, and the suspension ropes 3 are respectively wound around the upper side of the first pulley and the lower side of the second pulley. The tensioning device includes a rectangular frame 7 and an inverted V-shaped suspension rope 8. The upper part of the rectangular frame 7 is connected to the inverted V-shaped suspension rope 8, and the lower part is connected to the other end of the suspension rope 3.

[0017] (S3) Pass the two steel pipes 4 through the corresponding connecting rings 5 ​​at both ends of the fixing frame 1, and install the annular baffles 6 at both ends of the steel pipes 4.

[0018] The inner diameter of the connecting ring 5 is larger than the outer diameter of the steel pipe 4, so that the steel pipe 4 can be inserted into or pulled out of the connecting ring 5. The steel pipe 4 and the annular baffle 6 are connected by threads for easy disassembly. The connecting ring 5 and the annular baffle 6 can be used for separation and limiting between multiple steel arch frames 9.

[0019] (S4) Connect the hoisting device to the tensioning device, lift the tensioning device, tighten the hoisting rope 3, so that the steel pipe 4 and the fixed frame 1 clamp the steel arch frame 9 between them to fix the steel arch frame 9, and then move the steel arch frame 9 to the designated position.

[0020] The top of the inverted V-shaped hoisting rope 8 can be connected to the hook of the hoisting device. The hoisting device pulls the inverted V-shaped hoisting rope 8 upward to tighten the hoisting rope 3, so that the steel pipe 4 and the fixing frame 1 clamp the steel arch frame 9 between them, thereby fixing the steel arch frame 9.

[0021] (S5) After hoisting the steel arch frame 9 to the designated position, remove the annular baffles 6 at both ends of the steel pipe 4, pull the steel pipe 4 out of the connecting ring 5, and take out the connecting ring 5 and the hoisting rope 3 from the gap between the steel arch frame 9.

[0022] (S6) Repeat steps S1 to S5 until all steel arch frames 9 are hoisted to the designated position.

[0023] The beneficial effects of this embodiment are: the hoisting does not require any welding, the operation is simple, and it can be reused repeatedly; by tightening the hoisting rope through the tensioning device, the steel pipe and the fixed frame clamp the steel arch frame between them, thereby fixing the steel arch frame and realizing the reliable hoisting of the steel arch frame.

[0024] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A method for auxiliary hoisting of a tunnel steel arch frame, characterized in that... The hoisting method includes the following steps: (S1) Several steel arch frames are placed side by side in the slot of an inverted U-shaped fixed frame, wherein several pulley sets are provided at both ends of the top of the fixed frame; (S2) Wrap the hoisting rope around the pulley block, connect one end of the hoisting rope to the tensioning device, and install a connecting ring on the other end of the hoisting rope so that the end of the hoisting rope with the connecting ring passes through the gap between the steel arch frames and extends to the bottom of the steel arch frame. (S3) Pass the two steel pipes through the connecting rings at both ends of the fixing frame respectively, and install annular baffles at both ends of the steel pipes; (S4) Connect the hoisting device to the tensioning device, hoist the tensioning device, and tighten the hoisting rope so that the steel pipe and the fixing frame clamp the steel arch frame between them to fix the steel arch frame. (S5) After hoisting the steel arch frame to the designated position, remove the annular baffles at both ends of the steel pipe, pull the steel pipe out of the connecting ring, and take out the connecting ring and the hoisting rope from the gap between the steel arch frame; (S6) Repeat steps S1 to S5 until all the steel arches are hoisted to the designated position.

2. The auxiliary hoisting method for tunnel steel arch frames according to claim 1, characterized in that... The fixing frame includes a top plate and two side plates. Both the top plate and the side plates are arc-shaped. The arc surface of the top plate is adapted to the arc surface of the top of the steel arch frame, and the arc surface of the side plates is adapted to the arc surface of the side of the steel arch frame.

3. The auxiliary hoisting method for tunnel steel arch frames according to claim 1, characterized in that... The tensioning device includes a rectangular frame and an inverted V-shaped suspension rope. The upper part of the rectangular frame is connected to the inverted V-shaped suspension rope, and the lower part is connected to the other end of the suspension rope.

4. The auxiliary hoisting method for tunnel steel arch frames according to claim 1, characterized in that... The top of the fixed frame is provided with three pulley groups at each end, and each pulley group consists of two pulleys.

5. The auxiliary hoisting method for tunnel steel arch frames according to claim 4, characterized in that... The two pulleys are a first pulley located near the outermost end of the top of the fixed frame and a second pulley located away from the outermost end of the top of the fixed frame, and the suspension rope is wrapped around the upper side of the first pulley and the lower side of the second pulley, respectively.

6. The auxiliary hoisting method for a tunnel steel arch frame according to claim 1, characterized in that... The inner diameter of the connecting ring is larger than the outer diameter of the steel pipe.

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