Component of embedded channel for tunnel construction and method for using the component

Abstract

The present invention belongs to the technical field of tunnel engineering construction, and specifically relates to a component of a new type of embedded channel for tunnel construction and a method for using the component. The component includes a channel body, an anchor rod and an embedded filling piece. The embedded filling piece is filled in the T-slot of the channel body. The anchor rod is arranged at the upper end of the channel body. The upper end of the channel body is also provided with a group of first telescopic rods and second telescopic rods. The telescopic end of the first telescopic rod is hinged to the lap steel bar by means of a hinge shaft. The telescopic end of the second telescopic rod is fixed with a hook. The overhanging end of the lap steel bar extends toward and passes through the hook. The telescopic ends of the first telescopic rod and the second telescopic rod are contracted to make the lap steel bar overlap the horizontal positioning steel bar of the second lining steel mesh, eliminating the welding operation in the grounding operation. The operation is simple and quick, the requirement for the size of the operating space is low, and it also helps to maintain a good construction environment.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel engineering construction, and in particular relates to a component of a novel pre-buried channel for tunnel construction and a method for using the component. Background Art

[0002] Embedded channels are metal components that are pre-buried in concrete structures during tunnel construction and are used to fix and install various ancillary facilities. Anchor rods are installed on the embedded channels. During construction, the embedded channels usually need to be fixed on a trolley, which transports the embedded channels to a preset position. Steel bars are welded between the anchor rods and the pre-built tunnel secondary lining steel mesh to form a grounding connection, completing the grounding of the embedded channels. In order to ensure the grounding effect, the secondary lining steel mesh and multiple anchor rods need to be welded to the steel bars, which is a large welding workload. However, the space between the trolley and the secondary lining steel mesh is narrow, and the movement of the welding gun between the trolley and the secondary lining steel mesh is limited. This makes it inconvenient for construction workers to operate, resulting in difficulties in welding construction and difficulty in ensuring welding quality. Problems such as substandard weld length and thickness, incomplete welding, and incomplete welding may occur. On the other hand, the smoke containers generated during the welding process gather in a small space, resulting in a poor construction environment and further exacerbating the difficulty of welding construction. Summary of the Invention

[0003] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a component of a new type of embedded channel for tunnel construction and a method for using the component. The embedded channel and the second lining steel mesh are connected by overlapping the overlapping steel bars through a first telescopic rod and a second telescopic rod provided on the channel body, thereby eliminating the welding operation in the grounding operation, and the operation is simple and quick, with low requirements on the size of the operating space, which also helps to maintain a good construction environment.

[0004] The specific technical solution adopted in the present invention is:

[0005] A new type of pre-buried channel component for tunnel construction, including a channel body, an anchor rod and an embedded filling piece, the channel body is provided with a T-slot, the embedded filling piece is detachably filled in the T-slot, and the anchor rod is arranged at the upper end of the channel body. The key point is that the upper end of the channel body is also provided with a group of first telescopic rods and second telescopic rods, the first telescopic rods and the second telescopic rods are respectively arranged between the anchor rods and spaced apart along the circumferential direction of the channel body, the telescopic end of the first telescopic rod is hinged to the lap steel bar by means of a hinge shaft, the axial direction of the hinge shaft is cross-arranged with the radial direction of the tunnel, the telescopic end of the second telescopic rod is fixed with a hook, the axial direction of the hook is cross-arranged with the axial direction of the hinge shaft, the cantilevered end of the lap steel bar extends toward the hook and passes through the hook, and the telescopic ends of the first telescopic rod and the second telescopic rod are contracted to make the lap steel bar overlap the horizontal positioning steel bar of the second lining steel mesh.

[0006] The first telescopic rod and the second telescopic rod are respectively basket bolts, the first telescopic rod includes a first adjusting rod, a first upper pull rod and a first lower pull rod respectively threadedly connected to the two ends of the first adjusting rod, the second telescopic rod includes a second adjusting rod, a second upper pull rod and a second lower pull rod respectively threadedly connected to the two ends of the second adjusting rod, the first lower pull rod and the second lower pull rod are respectively fixed to the channel body, the first upper pull rod is the telescopic end of the first telescopic rod, and the second upper pull rod is the telescopic end of the second telescopic rod.

[0007] The second telescopic rod is matched with a pair of first telescopic rods, and the first telescopic rods are respectively arranged on both sides of the second telescopic rod.

[0008] The embedded filling piece is an air bag.

[0009] Both ends of the airbag are respectively provided with bag openings, and both ends of the airbag are respectively provided with support bars, and the support bars are buckled with the shoulders of the T-slots, and a sealing plug is also set in the bag opening.

[0010] The airbag forms a group of closed chambers with the help of the separation section. The bottom of the airbag is a group of corrugated bottoms that are corrugated along the width direction of the airbag. The corrugated bottoms are respectively connected to the separation sections.

[0011] A method for using a novel pre-buried channel component for tunnel construction comprises the following steps:

[0012] S1. Remove the first upper pull rod from the first adjusting rod, remove the second upper pull rod from the second adjusting rod, and fix the channel body to the trolley;

[0013] S2. The mobile trolley transports the channel body to the preset installation position;

[0014] S3, fixing the second adjusting rod and rotating the second upper pull rod to install it on the second adjusting rod;

[0015] S4. Insert the overhanging end of the lap steel bar through the mesh of the secondary lining steel mesh and position it above the horizontal positioning steel bar. Move the overhanging end of the lap steel bar toward the draw hook until it passes through the draw hook.

[0016] S5. Fix the first upper rod and connect the first upper rod to the first adjusting rod by rotating the first adjusting rod;

[0017] S6. Rotate the first adjusting rod to move the first upper pull rod downward, and rotate the second adjusting rod to move the second upper pull rod downward, so that the overlapping steel bars come into contact with the horizontal positioning steel bars;

[0018] S7. Use binding wire to bind the overlapping steel bars to the horizontal positioning steel bars and the overlapping steel bars to the hooks to complete the grounding operation of the embedded channel.

[0019] The beneficial effects of the present invention are:

[0020] The present invention adopts a method of pre-setting a first telescopic rod and a second telescopic rod on the channel body, passing the lap steel bars on the first telescopic rod through the top of the horizontal positioning steel bars on the second lining steel bar net, and the overhanging end of the lap steel bar passes through the hook on the second telescopic rod. Through the adjustment of the telescopic ends of the first telescopic rod and the second telescopic rod, the two ends of the lap steel bar are pulled down, so that the lap steel bar contacts the horizontal positioning steel bar, realizing multi-point grounding connection between the embedded channel and the second lining steel bar net, effectively shortening the construction time, eliminating the need for multi-point welding, and maintaining a good construction environment.

[0021] The height of the telescopic ends of the first telescopic rod and the second telescopic rod can be adjusted by rotating the first adjusting rod and the second adjusting rod. The operation is simple and convenient, the requirement for the size of the operating space is low, and the construction time can be further shortened and the construction difficulty can be reduced.

[0022] The embedded filling piece on the channel body is an air bag, which is squeezed by the inner wall of the T-slot on the channel body to produce deformation, adapting to the shape of the T-slot and having a good filling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;

[0025] Figure 3 for Figure 1 A magnified schematic diagram of part B in the middle;

[0026] Figure 4 It is a schematic diagram of the assembly of the embedded filling piece and the channel body;

[0027] Figure 5 It is a structural diagram when the airbag is not filled into the channel body;

[0028] Figure 6 Schematic diagram of the structure of the separator in the airbag;

[0029] Figure 7 This is a schematic diagram of the installation steps of overlapping steel bars in a method for using a new type of pre-buried channel component for tunnel construction;

[0030] In the accompanying drawings, 1. channel body, 2. anchor rod, 3. T-slot, 4. first telescopic rod, 401. first adjusting rod, 402. first upper pull rod, 403. first lower pull rod, 5. second telescopic rod, 501. second adjusting rod, 502. second upper pull rod, 503. second lower pull rod, 6. hinge shaft, 7. lap steel bars, 8. hook, 9. second lining steel mesh, 901. horizontal positioning steel bars, 10. air bag, 1001. bag mouth, 1002. corrugated bottom, 1003. partition section, 11. support bar, 12. sealing plug. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0032] Specific implementation examples Figure 1-3 As shown, the present invention relates to a new type of pre-buried channel component for tunnel construction, including a channel body 1, an anchor rod 2 and an embedded filling piece. The channel body 1 is provided with a T-slot 3, the embedded filling piece is filled in the T-slot 3, and the anchor rod 2 is arranged at the upper end of the channel body 1. The key is that a group of first telescopic rods 4 and second telescopic rods 5 are also provided at the upper end of the channel body 1. The first telescopic rod 4 and the second telescopic rod 5 are respectively arranged between the anchor rods 2 and are spaced apart along the circumferential direction of the channel body 1. The telescopic end of the first telescopic rod 4 is hinged to the lap steel bar 7 by means of a hinge shaft 6, and the axial direction of the hinge shaft 6 is cross-arranged with the radial direction of the tunnel. The telescopic end of the second telescopic rod 5 is fixed with a hook 8, and the axial direction of the hook 8 is cross-arranged with the axial direction of the hinge shaft 6. The overhanging end of the lap steel bar 7 extends toward the hook 8 and passes through the hook 8. The telescopic ends of the first telescopic rod 4 and the second telescopic rod 5 are contracted to make the lap steel bar 7 overlap the horizontal positioning steel bar 901 of the second lining steel mesh 9. The horizontal positioning steel bars 901 are arranged parallel to the axial direction of the arc-shaped steel bars on the second lining steel mesh 9 .

[0033] In this embodiment, the axial direction of the hinge shaft 6 is perpendicular to the radial direction of the tunnel, and the axial direction of the hinge shaft 6 is arranged parallel to the axial direction of the tunnel, that is, the axial direction of the hinge shaft 6 is arranged parallel to the axial direction of the arc-shaped steel bars on the second lining steel mesh 9, and the lap steel bar 7 can swing around the axial direction of the hinge shaft 6, so that it can pass above the horizontal positioning steel bar 901 and pass through the hook 8; through the contraction of the telescopic end of the first telescopic rod 4 and the telescopic end of the second telescopic rod 5, the telescopic end of the first telescopic rod 4 and the hook 8 respectively pull the two ends of the lap steel bar 7 downward, so that the lap steel bar 7 overlaps and is pressed on the horizontal positioning steel bar 901 between the first telescopic rod 4 and the second telescopic rod 5 and contacts the horizontal positioning steel bar 901, thereby realizing the connection between the channel body 1 and the second lining steel mesh 9, and avoiding welding of the channel body 1, thereby ensuring the anti-corrosion effect of the channel body 1.

[0034] In this embodiment, the second telescopic rod 5 is matched with a pair of first telescopic rods 4. The first telescopic rods 4 are respectively arranged on both sides of the second telescopic rod 5. The lap steel bars 7 on the first telescopic rod 4 pass through the hooks 8 on the second telescopic rod 5. When the telescopic ends of the first telescopic rod 4 and the second telescopic rod 5 are contracted so that the lap steel bars 7 are overlapped on the horizontal positioning steel bars 901, the connection between the second lining steel mesh 9 and the channel body 1 at three different positions is satisfied.

[0035] Preferably, the first telescopic rod 4 and the second telescopic rod 5 are respectively turnbuckles, such as Figure 2 As shown, the first telescopic rod 4 includes a first adjusting rod 401, a first upper rod 402 and a first lower rod 403 respectively connected to both ends of the first adjusting rod 401 by threads; Figure 3 As shown, the second telescopic rod 5 includes a second adjusting rod 501, a second upper pull rod 502 and a second lower pull rod 503 respectively threadedly connected to the two ends of the second adjusting rod 501, the first lower pull rod 403 and the second lower pull rod 503 are respectively fixed to the channel body 1, the first upper pull rod 402 is the telescopic end of the first telescopic rod 4, and the second upper pull rod 502 is the telescopic end of the second telescopic rod 5, the first lower pull rod 403 and the second lower pull rod 503 are respectively pre-fixed on the channel body 1, and when the channel body 1 is installed on the trolley and grounding operation is performed, the first upper pull rod 402 and the second upper pull rod 502 can be contracted by rotating the first adjusting rod 401 and the second adjusting rod 501, so that the lap steel bar 7 can be overlapped on the horizontal positioning steel bar 901 to realize the connection between the channel body 1 and the second lining steel mesh 9.

[0036] Preferably, the embedded filling piece in the T-slot 3 of the channel body 1 is an airbag 10, which is stuffed into the T-slot 3. The airbag 10 has good flexibility and elasticity. The airbag 10 is deformed by the squeezing of the inner wall of the T-slot 3 and adapts to the shape of the T-slot under the action of the internal air pressure to ensure the filling effect.

[0037] like Figure 4 As shown, the airbag 10 is provided with a bag opening 1001 at each end, and a support bar 11 is provided at each end. The support bar 11 is arranged to engage with the shoulder of the T-slot 3, facilitating the insertion of the airbag 10 into the T-slot 3. It also better fixes the position of the airbag 10, prevents the airbag 10 from falling out, and improves the filling reliability. When other equipment is installed on the channel body 1, the airbag 10 can be easily removed from the T-slot 3.

[0038] The support bar 11 is connected to the bottom of the airbag 10 , reducing the constraint on the upper end of the airbag 10 , so that the airbag 10 can be better filled in the T-slot 3 .

[0039] A sealing plug 12 is also installed in the bag opening 1001. The sealing plug 12 is filled in the bag opening 1001 so that the four sides of the bag opening 1001 are fully fitted with the inner wall of the T-slot 3, avoiding gaps between the two ends of the T-slot 3 and the airbag 10, and preventing concrete from entering the T-slot 3 during tunnel pouring.

[0040] like Figure 5 、 Figure 6 As shown, the airbag 10 forms a group of closed chambers with the help of the partition section 1003. The bottom of the airbag 10 is a group of corrugated bottoms 1002 that are corrugated along the width direction of the airbag 10. The corrugated bottoms 1002 are respectively connected to the partition sections 1003. The corrugated bottoms 1002 can stretch or fold as the width of the airbag 10 changes. The corrugation of the corrugated bottom 1002 provides more deformation margin for the changes of the airbag 10, which facilitates the filling of the sealing plug 12 into the bag opening 1001 so that the four sides of the bag opening 1001 are fully fitted with the inner wall of the T-slot 3.

[0041] The setting of the partition section 1003 increases the strength and stability of the airbag 10, making the airbag 10 less likely to be damaged when filling the T-slot 3; the airbag 10 can also be cut according to the length of different channel bodies 1. After cutting, the middle section of the airbag 10 still has multiple closed chambers, and new bag openings 1001 are formed at both ends of the airbag 10.

[0042] When the airbag 10 is filled into the T-slot 3, the airbag 10 is squeezed by the inner wall of the T-slot 3, and the bottom of the airbag 10 protrudes outward from the lower end of the T-slot 3. The design of the corrugated bottom 1002 provides sufficient deformation for the bottom of the airbag 10. When the channel body 1 is installed on the trolley, the trolley contacts and squeezes the bottom of the airbag 10, so that the airbag 10 further adapts to the shape of the T-slot 3 and fills the T-slot 3, further preventing concrete from entering the T-slot 3.

[0043] A method for using a novel pre-buried channel component for tunnel construction comprises the following steps:

[0044] S1. Remove the first upper rod 402 from the first adjustment rod 401, remove the second upper rod 502 from the second adjustment rod 501, and fix the channel body 1 to the trolley;

[0045] S2, the mobile trolley transports the channel body 1 to the preset installation position;

[0046] S3, fix the second adjusting rod 501, and rotate the second upper pull rod 502 to install it on the second adjusting rod 501;

[0047] S4, insert the overhanging end of the lap steel bar 7 through the mesh of the second lining steel mesh 9 and position it above the horizontal positioning steel bar 901, and move the overhanging end of the lap steel bar 7 toward the hook 8 until it passes through the hook 8;

[0048] S5. Fix the first upper rod 402 and connect the first upper rod 402 to the first adjusting rod 401 by rotating the first adjusting rod 401;

[0049] S6, respectively rotate the first adjusting rod 401 to move the first upper rod 402 downward, rotate the second adjusting rod 501 to move the second upper rod 502 downward, so that the overlapping steel bars 7 are in contact with the horizontal positioning steel bars 901, as shown in FIG. Figure 7 As shown;

[0050] S7. Use the binding wire to bind the overlapping steel bars 7 to the horizontal positioning steel bars 901 and the overlapping steel bars 7 to the hooks 8 to complete the grounding operation of the embedded channel.

[0051] The first upper pull rod 402 and the second upper pull rod 502 can be extended and retracted by rotating the first adjusting rod 401 and the second adjusting rod 501 without the need for complicated tools, thus avoiding the open flame operation of high-altitude welding. The retractable first upper pull rod 402 and the second upper pull rod 502 can adjust the height to make the lap steel bars 7 adapt to the second lining steel mesh 9 of different sizes, so that the lap steel bars 7 can maintain stable contact with the horizontal positioning steel bars 901 of the second lining steel mesh 9.

Claims

1. A component of a pre-buried channel for tunnel construction, comprising a channel body (1), an anchor rod (2) and an embedded filling piece, wherein the channel body (1) is provided with a T-shaped groove (3), the embedded filling piece is detachably filled in the T-shaped groove (3), the anchor rod (2) is provided at the upper end of the channel body (1), and is characterized in that: The upper end of the channel body (1) is further provided with a group of first telescopic rods (4) and second telescopic rods (5), the first telescopic rods (4) and the second telescopic rods (5) are respectively arranged between the anchor rods (2) and spaced apart along the circumferential direction of the channel body (1), the telescopic end of the first telescopic rod (4) is hinged to the lap steel bar (7) by means of a hinge shaft (6), the axial direction of the hinge shaft (6) is arranged to intersect with the radial direction of the tunnel, the telescopic end of the second telescopic rod (5) is fixed with a hook (8), the axial direction of the hook (8) is arranged to intersect with the axial direction of the hinge shaft (6), the overhanging end of the lap steel bar (7) extends toward the hook (8) and passes through the hook (8), the telescopic ends of the first telescopic rod (4) and the second telescopic rod (5) are contracted so that the lap steel bar (7) is overlapped with the horizontal positioning steel bar (901) of the second lining steel mesh (9); The first telescopic rod (4) and the second telescopic rod (5) are respectively basket bolts. The first telescopic rod (4) includes a first adjusting rod (401), a first upper pull rod (402) and a first lower pull rod (403) respectively threadedly connected to the two ends of the first adjusting rod (401). The second telescopic rod (5) includes a second adjusting rod (501), a second upper pull rod (502) and a second lower pull rod (503) respectively threadedly connected to the two ends of the second adjusting rod (501). The first lower pull rod (403) and the second lower pull rod (503) are respectively fixed to the channel body (1). The first upper pull rod (402) is the telescopic end of the first telescopic rod (4), and the second upper pull rod (502) is the telescopic end of the second telescopic rod (5).

2. A component for pre-buried channel for tunnel construction according to claim 1, characterized in that: The second telescopic rod (5) is matched with a pair of first telescopic rods (4), and the first telescopic rods (4) are respectively arranged on both sides of the second telescopic rod (5).

3. The component for pre-buried channel for tunnel construction according to claim 1, characterized in that: The embedded filling piece is an airbag (10).

4. The component for pre-buried channel for tunnel construction according to claim 3, characterized in that: Both ends of the airbag (10) are provided with bag openings (1001), and both ends of the airbag (10) are provided with support bars (11). The support bars (11) are buckled with the shoulders of the T-slot (3), and a sealing plug (12) is also installed in the bag opening (1001).

5. The component for pre-buried channel for tunnel construction according to claim 3, characterized in that: The airbag (10) forms a group of sealed chambers with the help of the partition joint (1003), and the bottom of the airbag (10) is a group of corrugated bottoms (1002) that are corrugated along the width direction of the airbag (10), and the corrugated bottoms (1002) are respectively connected to the partition joints (1003).

6. The method for using a component of a pre-buried channel for tunnel construction according to claim 1, characterized in that: The following steps are involved: S1. Remove the first upper pull rod (402) from the first adjustment rod (401), remove the second upper pull rod (502) from the second adjustment rod (501), and fix the channel body (1) to the trolley; S2, the mobile trolley transports the channel body (1) to a preset installation position; S3, fixing the second adjusting rod (501), and rotating the second upper pull rod (502) so that it is installed on the second adjusting rod (501); S4, inserting the overhanging end of the lap steel bar (7) along the mesh of the second lining steel bar mesh (9) and positioning it above the horizontal positioning steel bar (901), and moving the overhanging end of the lap steel bar (7) toward the hook (8) until it passes through the hook (8); S5, fixing the first upper pull rod (402), and connecting the first upper pull rod (402) to the first adjusting rod (401) by rotating the first adjusting rod (401); S6, respectively rotating the first adjusting rod (401) to move the first upper pull rod (402) downward, and rotating the second adjusting rod (501) to move the second upper pull rod (502) downward, so that the lap steel bar (7) contacts the horizontal positioning steel bar (901); S7. Using the binding wire, the overlapping steel bars (7) are bound to the horizontal positioning steel bars (901), and the overlapping steel bars (7) are bound to the hook (8), thereby completing the grounding operation of the embedded channel.

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