Sliding rail mechanism of pre-supporting shield equipment

Abstract

The utility model belongs to the technical field of tunnel construction, and particularly relates to a pre-supporting shield equipment sliding rail mechanism which comprises four steel plates arranged side by side, a plurality of positioning alloy blocks are welded to the lower edges of the two sides of each steel plate at intervals, and concave alloy jackets with downward openings are arranged outside the positioning alloy blocks in a sleeved mode. The lower edges of the alloy clamping sleeves are bent in the direction away from the positioning alloy blocks, pin holes are formed in the bent positions, alloy loading plates are integrally installed on the sides, away from the steel plate, of the alloy clamping sleeves, one faces of the alloy loading plates are attached to the end faces of the adjacent positioning alloy blocks, arc-shaped alloy strips are welded to the other ends of the alloy loading plates, and every two adjacent arc-shaped alloy strips are parallel to each other. Positioning holes are formed in the arc-shaped alloy strips, and an alloy pin is inserted between every two adjacent positioning holes. The cross-over type multi-point support of the rib frame in the sliding rails is formed, so that the sliding rails can share the load through mutual cooperative load, and the structural strength of the sliding rails cannot be damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction, and particularly relates to a slide rail mechanism for a prefabricated shield device. Background Art

[0002] In shield tunnel construction, the slide rail not only supports the walking of the shield machine, but also guides the tunneling direction of the shield machine through its layout and orientation. Especially when the tunneling direction needs to be changed, such as through equipment like shield turnouts, the slide rail can ensure that the shield machine accurately and stably switches to a new tunneling path.

[0003] For each ring of tunneling distance, a ring of lining segments is assembled under the support of the shield tail. After aligning the position according to the drawing, generally four slide rails made of angle steel are installed inside the ring of lining segments. The slide rails are used to carry the screw conveyor. While advancing, they need to be pre-laid at intervals, and the subsequent slide rails can be disassembled when idle.

[0004] When the existing angle steel slide rails are installed, pin holes are spacedly opened on the upper surface, and T-shaped bolts are inserted and fixed to the ring of lining segments. However, the thickness of the slide rail corresponding to the T-shaped bolt is reduced, which may cause cracking or bending. Even if the pin holes are removed and fixed with T-shaped bolts from both sides, each slide rail is still relatively isolated, and it is not convenient for the slide rails to cooperate with each other to share the load. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a slide rail mechanism for a prefabricated shield device, which can form a rib framework for multi-point spanning support inside the slide rail, is convenient for the slide rails to cooperate with each other to share the load, and does not damage the structural strength of the slide rail.

[0006] The technical solution adopted by the utility model is specifically as follows:

[0007] A pre - advance shield equipment slide rail mechanism includes four steel plates arranged side by side. Multiple positioning alloy blocks are welded at intervals on the lower edges of both sides of the steel plates. Alloy jacket sleeves with concave openings facing downwards are sleeved outside the positioning alloy blocks. The lower edges of the alloy jacket sleeves are bent away from the positioning alloy blocks, and pin holes are opened at the bent parts. Alloy load - bearing plates are integrally installed on the sides of the alloy jacket sleeves away from the steel plates. One side of each alloy load - bearing plate is attached to the end face of the adjacent positioning alloy block, and arc - shaped alloy bars are welded at the other ends. Two adjacent arc - shaped alloy bars are parallel to each other. Reserved holes are drilled in the lower wall of each ring lining segment. The four steel plates 1 are pre - welded with positioning alloy blocks and are arranged on the lower wall of the ring lining segment according to the construction drawings. Then, the alloy jacket sleeves are put on, aligning each pin hole with the reserved hole, and hydraulic bolts are inserted to tighten the alloy jacket sleeves, so that the alloy jacket sleeves and the alloy load - bearing plates wrap the positioning alloy blocks, clamping the steel plates from both sides and also providing axial limit to the steel plates. When carrying the pre - advance shield equipment, a rib framework composed of positioning alloy blocks, alloy jacket sleeves, alloy load - bearing plates and arc - shaped alloy bars provides multi - point spanning support inside the slide rail, facilitating the mutual cooperation of the slide rails to share the load and not damaging the structural strength of the slide rail.

[0008] As a preferred solution, positioning holes are opened on the arc - shaped alloy bars, and alloy pins are inserted between two adjacent positioning holes. After the alloy jacket sleeves are fixed with hydraulic bolts, the positioning holes on two adjacent arc - shaped alloy bars are aligned, and then the alloy pins are inserted to provide tangential limit to the arc - shaped alloy bars. Axial limit is exerted on the arc - shaped alloy bars by the positioning alloy blocks and the alloy jacket sleeves, so that the arc - shaped alloy bars are locked on the lower wall of the ring lining segment, lower than the upper surface of the steel plates and not hindering the movement of each equipment.

[0009] As a preferred solution, one end of the alloy pin protrudes in a disc shape, and the other end of the alloy pin passes through two positioning holes and is threaded through a limit bolt. The limit bolts are all arranged outside the positioning holes. After the alloy pin passes through the positioning holes, the disc - shaped protrusion adheres to one arc - shaped alloy bar, and one end exposes the threaded hole. At this time, the limit screw is rotated clockwise along the thread and screwed into the threaded hole to limit the alloy pin.

[0010] As a preferred solution, sealing rubber strips are bonded to the inner walls of the alloy jacket sleeves. The sealing rubber strips are sleeved outside the positioning alloy blocks. The gaps between the positioning alloy blocks and the alloy jacket sleeves are sealed by the sealing rubber strips, reducing the falling of particulate impurities, facilitating the alloy jacket sleeves to sleeve the positioning alloy blocks tightly and not being prone to loosening or deviation.

[0011] As a preferred solution, grooves are opened on both sides of the positioning alloy blocks. The openings of the grooves are in interference fit with the inner sides of the adjacent sealing rubber strips for the deformation and insertion of the sealing rubber strips, increasing the support area, especially making it difficult for the sealing rubber strips to slip.

[0012] As a preferred solution, edges are welded to both sides of the end face of the steel plate, and gaps are left between two adjacent edges. When the steel plates are connected end to end, the two edges fit together, and axial alignment can be carried out to align the two steel plates. On the curved surface of the tunnel, the end face of the steel plate and the edges can be cut into inclined surfaces to adapt to the curvature of the tunnel.

[0013] As a preferred solution, a reticulated layer is provided on the lower surface of the steel plate.

[0014] The technical effects achieved by the present utility model are as follows:

[0015] In the present utility model, reserved holes are drilled in the lower wall of each ring lining segment. Four positioning alloy blocks are pre-welded on the steel plates and arranged on the lower wall of the ring lining segment according to the construction drawings. Then, an alloy jacket is sleeved, so that each pin hole is aligned with the reserved hole, and a hydraulic bolt is inserted to tighten the alloy jacket, so that the alloy jacket and the alloy load plate wrap the positioning alloy block, realizing clamping the steel plates from both sides and also axially limiting the steel plates. When carrying the pre-support shield equipment, a rib framework composed of the positioning alloy block, the alloy jacket, the alloy load plate and the arc-shaped alloy bar provides multi-point spanning support inside the slide rail, facilitating the mutual cooperation of the slide rails to share the load, and not damaging the structural strength of the slide rail.

[0016] The positioning holes of the present utility model are inserted with alloy pins to limit the arc-shaped alloy bar tangentially, and the positioning alloy block and the alloy jacket apply an axial limiting effect to the arc-shaped alloy bar, so that the arc-shaped alloy bar is locked on the lower wall of the ring lining segment, lower than the upper surface of the steel plate, and does not hinder the progress of each equipment. In the final stage, the limiting bolt is reversed to disengage from the threaded hole, and then the alloy pin is pulled out, so that two adjacent arc-shaped alloy bars are disengaged, and the hydraulic bolt is pulled out to separate the alloy jacket and the positioning alloy block, releasing the locked state of the steel plate for convenient disassembly. Description of the Drawings

[0017] Figure 1 is the front view of a slide rail mechanism of a pre-support shield equipment of the present utility model;

[0018] Figure 2 is the bottom view of the steel plate of the present utility model;

[0019] Figure 3 is the side view of the alloy jacket of the present utility model;

[0020] Figure 4 is the front view of a pair of arc-shaped alloy bars of the present utility model;

[0021] Figure 5 is the front view of the alloy pin of the present utility model.

[0022] In the drawings, the list of components represented by each reference numeral is as follows:

[0023] 1. Steel plate; 2. Positioning alloy block; 3. Alloy jacket; 4. Pin hole; 5. Alloy load-bearing plate; 6. Arc alloy strip; 7. Positioning hole; 8. Alloy pin; 9. Limit bolt; 10. Sealing strip; 11. Groove; 12. Edge wrapping; 13. Reticulated layer. DETAILED DESCRIPTION

[0024] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0025] Embodiment 1:

[0026] like Figures 1 - 5 As shown, a slide rail mechanism of a pre-supported shield equipment includes four steel plates 1 arranged side by side, and multiple positioning alloy blocks 2 are welded at intervals on the lower edges of both sides of the steel plates 1. The number of positioning alloy blocks 2 can reach dozens. One, the number is set to 3, which is suitable for shorter steel plates 1, and the number is set to 20, which is suitable for longer steel plates 1. In this embodiment, 5 positioning alloy blocks 2 are preferably used. The outer sides of the positioning alloy blocks 2 are all sleeved with alloy jackets 3 that are concave and open downward. The lower edges of the alloy jackets 3 are bent away from the positioning alloy blocks 2 and pin holes 4 are provided at the bending points. The side of the alloy jackets 3 away from the steel plates 1 is integrally installed with alloy load plates 5. One side of the alloy load plates 5 is attached to the end faces of the adjacent positioning alloy blocks 2, and the other ends are welded with arc-shaped alloy strips 6, and two adjacent arc-shaped alloy strips 6 are parallel to each other.

[0027] During the laying phase, starting from the starting station, a ring of lining segments is assembled under the shield tail support for each ring of excavation distance, and reserved holes are drilled on the lower wall of each ring of lining segments. The four steel plates 1 are pre-welded with positioning alloy blocks 2 and laid out on the lower wall of the ring lining segments according to the construction drawings. Then put on the alloy jacket 3, align each pin hole 4 with the reserved hole, and then use hydraulic bolts to tighten the alloy jacket 3, so that the alloy jacket 3 and the alloy load plate 5 wrap the positioning alloy block 2, clamp the steel plate 1 from both sides, and limit the steel plate 1 axially. At the same time, two arc-shaped alloy strips 6 span the support between the two steel plates 1.

[0028] During the excavation stage, the pre-supported shield equipment advances along four arc-shaped steel plates 1 and stops intermittently. The rib frame composed of positioning alloy blocks 2, alloy jackets 3, alloy load-bearing plates 5 and arc-shaped alloy bars 6 is supported at multiple points in a spanning manner inside the slide rails, which facilitates the slide rails to coordinate load-bearing to share the load without destroying the structural strength of the slide rails.

[0029] In terms of selection, the positioning alloy block 2, alloy jacket 3, alloy load-bearing plate 5 and arc-shaped alloy bar 6 are all lower than the steel plate 1, enabling the steel plate 1 to well carry various equipment and avoiding scratching the equipment by other components. The overall surface of the mechanism is hardened, wear-resistant, and has good support strength. Especially in tunnels with many small particles, it has anti-fatigue durability in the working environment.

[0030] Refer to the appendix Figure 1 and Figure 4 , positioning holes 7 are provided on the arc-shaped alloy bar 6. Alloy pins 8 are inserted between two adjacent positioning holes 7. After the alloy jacket 3 is fixed with hydraulic bolts, the positioning holes 7 on two adjacent arc-shaped alloy bars 6 are aligned, and then the alloy pins 8 are inserted to limit the arc-shaped alloy bar 6 tangentially. The positioning alloy block 2 and alloy jacket 3 exert an axial limiting effect on the arc-shaped alloy bar 6, so that the arc-shaped alloy bar 6 is locked under the lower wall of the ring lining segment, lower than the upper surface of the steel plate 1, and does not hinder the movement of each equipment.

[0031] Refer to the appendix Figure 4 and Figure 5 , one end of the alloy pin 8 protrudes in a disc shape. The other end of the alloy pin 8 passes through two positioning holes 7 and is threaded through with a limit bolt 9. The limit bolts 9 are all arranged outside the positioning holes 7. After the alloy pin 8 passes through the positioning holes 7, the disc-shaped protrusion adheres to one arc-shaped alloy bar 6, and one end exposes a threaded hole. At this time, the limit bolt 9 is rotated clockwise along the thread into the threaded hole to limit the alloy pin 8.

[0032] Final stage: Since the tunnel excavation is relatively deep, some slide rails are idle or damaged and need to be disassembled. At this time, reverse the limit bolt 9 to disengage from the threaded hole, then pull out the alloy pin 8 to release two adjacent arc-shaped alloy bars 6, and pull out the hydraulic bolts to separate the alloy jacket 3 and the positioning alloy block 2, releasing the locking state of the steel plate 1 for convenient disassembly.

[0033] The working principle of the present utility model is as follows: During operation, reserved holes are drilled in the lower wall of each ring lining segment. Four steel plates 1 are pre-welded with positioning alloy blocks 2 and are arranged on the lower wall of the ring lining segment according to the construction drawings. Then, the alloy jacket 3 is put on, aligning each pin hole 4 with the reserved hole, and then the hydraulic bolts are inserted to tighten the alloy jacket 3, so that the alloy jacket 3 and the alloy load-bearing plate 5 wrap the positioning alloy block 2, realizing clamping the steel plate 1 from both sides and also being able to limit the steel plate 1 axially.

[0034] When carrying the pre-support shield equipment, a rib framework composed of the positioning alloy block 2, alloy jacket 3, alloy load-bearing plate 5 and arc-shaped alloy bar 6 provides multi-point spanning support inside the slide rail, facilitating the mutual cooperation of the slide rails to share the load and not damaging the structural strength of the slide rail.

[0035] Embodiment 2:

[0036] To make the slide rail more firmly installed on the ring lining segment, we have made further improvements.

[0037] Refer to the attached Figure 2 and Figure 3 , sealing rubber strips 10 are adhesively bonded to the inner walls of the alloy jacket 3. The sealing rubber strips 10 are all sleeved outside the positioning alloy block 2. The gaps between the positioning alloy block 2 and the alloy jacket 3 are sealed by the sealing rubber strips 10, reducing the falling granular impurities, facilitating the alloy jacket 3 to sleeve the positioning alloy block 2, closing tightly, and not being easily loosened or deviated.

[0038] Refer to the attached Figure 1 and Figure 2 , grooves 11 are provided on both sides of the positioning alloy block 2. The openings of the grooves 11 are in interference fit with the inner sides of the adjacent sealing rubber strips 10 for the deformation and insertion of the sealing rubber strips 10, increasing the supporting area, especially the sealing rubber strips 10 are not easily slipped off.

[0039] Refer to the attached Figure 1 and Figure 2 , edge wrappings 12 are welded to both sides of the end face of the steel plate 1. Spaces are left between two adjacent edge wrappings 12. When the steel plates 1 are connected end to end, the two edge wrappings 12 are fitted together, and can be corrected axially to align the two steel plates 1. On the curved surface of the tunnel, the end face of the steel plate 1 and the edge wrapping 12 can be cut into inclined surfaces to adapt to the tunnel curvature.

[0040] Refer to the attached Figure 1 and Figure 2 , reticulated layers 13 are provided on the lower surfaces of the steel plates 1, having a larger connection area with the ring lining segment, good frictional property of the connection surface, and not being easily slipped or deviated.

[0041] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, if not specifically stated and limited, are implemented according to the conventional means in the art.

Claims

1. A pre - advance shield equipment slide rail mechanism, comprising four steel plates (1) arranged side by side, characterized in that: A plurality of positioning alloy blocks (2) are welded at intervals on the lower edges of both sides of the steel plate (1). An alloy jacket (3) with a concave downward opening is sleeved outside each positioning alloy block (2). The lower edge of the alloy jacket (3) is bent away from the positioning alloy block (2), and pin holes (4) are provided at the bent portions. An alloy load-bearing plate (5) is integrally installed on one side of the alloy jacket (3) away from the steel plate (1). One surface of the alloy load-bearing plate (5) is attached to the end face of the adjacent positioning alloy block (2), and an arc-shaped alloy bar (6) is welded at the other end. Two adjacent arc-shaped alloy bars (6) are parallel to each other.

2. The sliding rail mechanism of a prefabricated shield device according to claim 1, wherein: Positioning holes (7) are provided on the arc-shaped alloy bars (6). Alloy pins (8) are inserted between two adjacent positioning holes (7).

3. The sliding rail mechanism of the advance shield equipment according to claim 2, characterized in that: One end of the alloy pin (8) protrudes in a disc shape. The other end of the alloy pin (8) passes through two positioning holes (7) and is threadedly penetrated by a limit bolt (9). The limit bolts (9) are all arranged outside the positioning holes (7).

4. A slide rail mechanism of a pre - advanced shield device according to claim 1, characterized in that: Sealing rubber strips (10) are bonded to the inner walls of the alloy jackets (3). The sealing rubber strips (10) are sleeved outside the positioning alloy blocks (2).

5. The sliding rail mechanism of a pre - advanced shield device according to claim 4, characterized in that: Grooves (11) are provided on both sides of the positioning alloy block (2). The openings of the grooves (11) are in interference fit with the inner sides of the adjacent sealing rubber strips (10).

6. The sliding rail mechanism of a pre - advanced shield device according to claim 1, characterized in that: Edges (12) are welded on both sides of the end face of the steel plate (1). A gap is left between two adjacent edges (12).

7. A sliding rail mechanism of a prefabricated shield device according to claim 1, characterized in that: A reticulated layer (13) is provided on the lower surface of the steel plate (1).

Images