Fixing device for tunnel lining embedded grouting pipe

Abstract

The utility model discloses a fixing device for a tunnel lining embedded grouting pipe, and relates to the field of tunnel lining construction. Comprising a rubber plug; a second through hole is formed in the rubber plug in the axial direction, the left side of the rubber plug abuts against the outer side of the lining trolley formwork, and the right side of the rubber plug is plugged into the embedded grouting pipe; a bolt and a nut are further included; the bolt sequentially penetrates through the second through hole and the first through hole; the head of the bolt is located at the right end of the bolt and abuts against the right side of the rubber plug, and the nut is screwed into the left end of the bolt and abuts against the inner side of the lining trolley formwork. Firstly, the lining trolley is moved to the position where lining concrete is to be poured, and then the rubber plug is fixed to the outer side of a lining trolley formwork through the bolt and the nut; the right side of the rubber plug is plugged into the embedded grouting pipe; after secondary lining concrete pouring is completed and certain strength is achieved, the nuts are unscrewed, the bolts are pushed towards the direction of the pre-buried grouting pipe, the bolts are made to leave the lining trolley formwork, the lining trolley is moved away, and the rubber plugs and the bolts are taken out; and after the embedded grouting pipe is completely exposed, the subsequent grouting operation can be carried out.

Description

Technical Field

[0001] The utility model relates to the field of tunnel lining construction, in particular to a fixing device for pre-buried grouting pipes of tunnel lining. Background Technique

[0002] The secondary lining is the cast-in-place concrete or reinforced concrete lining constructed on the inner side of the initial support during the tunnel engineering construction, and together with the initial support, it forms a composite lining. In actual tunnel excavation projects, after the secondary lining concrete is poured and reaches a certain strength, it is often necessary to grout the surrounding soil layer of the tunnel to reinforce the soil layer. The existing method of grouting the surrounding soil layer of the tunnel is usually to fix the pre-buried grouting pipe on the pre-buried steel bars of the concrete to be poured by tying with iron wire before the secondary lining concrete is poured. After the secondary lining concrete is poured and reaches a certain strength, the grouting equipment placed in the tunnel then grouts the surrounding soil layer of the tunnel through the pre-buried grouting pipe. This method has the following problems: During the pouring process of the secondary lining concrete, it is inevitable that the vibrating rod touches the pre-buried grouting pipe, etc., and the pre-buried grouting pipe is prone to looseness and displacement due to disturbance. After the lining trolley is removed, the pre-buried grouting pipe cannot be found, and subsequent grouting operations cannot be carried out. Therefore, it is necessary to re-drill holes in the already poured concrete, increasing the workload and affecting the overall construction efficiency.

[0003] In order to solve the above problems, a fixing device for pre-buried grouting pipes of tunnel lining is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the existing method of fixing the pre-buried grouting pipe on the pre-buried steel bar is prone to cause the displacement of the pre-buried grouting pipe during the pouring process of the secondary lining concrete, and then it is impossible to find the pre-buried grouting pipe after the lining trolley is removed.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a fixing device for pre-buried grouting pipes of tunnel lining, a first through hole is opened on the lining trolley formwork, and the pre-buried grouting pipe is placed on the pre-buried steel bars of the lining concrete to be poured; it includes a rubber plug; the rubber plug is axially provided with a second through hole, the left side of the rubber plug abuts against the outer side of the lining trolley formwork, and the right side of the rubber plug is inserted into the pre-buried grouting pipe; it also includes a bolt and a nut; the bolt sequentially passes through the second through hole and the first through hole; the bolt head is located at the right end of the bolt and the head abuts against the right side of the rubber plug, and the nut is screwed into the left end of the bolt and the nut abuts against the inner side of the lining trolley formwork.

[0006] Further, the outer side of the rubber plug is wrapped with a film with butter.

[0007] Further, it also includes a first fixing steel bar and a second fixing steel bar. One end of the first fixing steel bar is welded to the left side of the embedded grouting pipe, and the other end is welded to the embedded steel bar of the lining concrete to be poured. The second fixing steel bar is horizontal, with its left side welded to the right side of the embedded grouting pipe and its right side inserted into the soil layer.

[0008] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0009] First, move the lining trolley to the location of the lining concrete to be poured, and then fix the rubber plug to the outside of the lining trolley formwork through bolts and nuts. The right side of the rubber plug is inserted into the embedded grouting pipe. Coupled with the fact that the embedded grouting pipe itself is placed on the embedded steel bar, the embedded grouting pipe is fixed, so that the embedded grouting pipe will not be displaced during the pouring process of the secondary lining concrete. After the secondary lining concrete is poured and reaches a certain strength, loosen the nut, push the bolt towards the embedded grouting pipe to make it leave the lining trolley formwork, then move away the lining trolley, and take out the rubber plug and the bolt. At this time, the embedded grouting pipe is completely exposed, and subsequent grouting operations can be carried out. Description of the Drawings

[0010] Figure 1 It is the overall schematic diagram of the present utility model.

[0011] The meanings of the reference numerals in the figure are as follows: 1, lining trolley formwork; 2, rubber plug; 3, embedded grouting pipe; 4, lining concrete to be poured; 5, bolt; 6, nut; 7, first fixing steel bar; 8, second fixing steel bar; 9, soil layer. Specific Embodiment

[0012] The technical solution of the present utility model will be clearly and completely described below in conjunction with the specification drawings and specific embodiments. The described embodiments are one of the embodiments of the present utility model, and the present utility model can also have other embodiments.

[0013] Embodiment:

[0014] Refer to Figure 1 , a fixing device for an embedded grouting pipe for tunnel lining of the present utility model. A first through hole is opened on the lining trolley formwork 1, and the embedded grouting pipe 3 is placed on the embedded steel bar of the lining concrete 4 to be poured. It includes a rubber plug 2. The rubber plug 2 is axially provided with a second through hole. The left side of the rubber plug 2 abuts against the outside of the lining trolley formwork 1, and the right side of the rubber plug 2 is inserted into the embedded grouting pipe 3. It also includes a bolt 5 and a nut 6. The bolt 5 sequentially passes through the second through hole and the first through hole. The head of the bolt 5 is located at the right end of the bolt 5 and the head abuts against the right side of the rubber plug 2, and the nut 6 is screwed into the left end of the bolt 5 and the nut 6 abuts against the inside of the lining trolley formwork 1.

[0015] In this embodiment, first move the lining trolley to the location of the lining concrete 4 to be poured, and then fix the rubber plug 2 to the outside of the lining trolley formwork 1 through bolts 5 and nuts 6; the right side of the rubber plug 2 is inserted into the embedded grouting pipe 3, and since the embedded grouting pipe 3 itself is placed on the embedded steel bars, the embedded grouting pipe 3 can be fixed, so that the embedded grouting pipe will not be displaced during the pouring process of the secondary lining concrete; after the secondary lining concrete is poured and reaches a certain strength, loosen the nut 6, push the bolt 5 towards the embedded grouting pipe 3 to make it leave the lining trolley formwork 1, then move away the lining trolley, and take out the rubber plug 2 and the bolt 5; at this time, the embedded grouting pipe 3 is completely exposed, and subsequent grouting operations can be carried out.

[0016] In this embodiment, the sequence of connecting the rubber plug 2 to the lining trolley formwork 1 and the embedded grouting pipe 3 can be adjusted according to the actual situation as long as it can be achieved. The left side of the embedded grouting pipe 3 is close to the lining trolley formwork 1 but does not abut against the lining trolley formwork 1. In this way, when the lining trolley formwork 1 is removed and the grouting operation is completed, and it is necessary to fill the embedded grouting pipe 3 with concrete, the concrete surface around the embedded grouting pipe 3 can be better roughened to ensure the quality of concrete pouring and prevent water seepage at the embedded grouting pipe 3.

[0017] As a preferred embodiment, the outside of the rubber plug 2 is wrapped with a film with butter.

[0018] In this embodiment, the outside of the rubber plug 2 is also coated with a plastic film with butter, which is convenient for the later removal of the rubber plug 2.

[0019] As a preferred embodiment, it further includes a first fixing steel bar 7 and a second fixing steel bar 8; one end of the first fixing steel bar 7 is welded to the left side of the embedded grouting pipe 3, and the other end is welded to the embedded steel bar of the lining concrete 4 to be poured; the second fixing steel bar 8 is horizontal, its left side is welded to the right side of the embedded grouting pipe 3, and the right side is inserted into the soil layer 9.

[0020] In this embodiment, the presence of the first fixing steel bar 7 and the second fixing steel bar 8 makes the embedded grouting pipe 3 more stable during the pouring process of the secondary lining concrete.

[0021] The "connection", "fixing", and "butt joint" mentioned in the description of the present utility model can be fixed connection, processing and forming, welding, or mechanical connection. The specific meanings of the above terms in the present utility model should be understood according to the specific situation.

[0022] In the description of the present utility model, the terms "inside", "above", "below", "end", "side", "outside", etc. indicate the orientation or positional relationship only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fixing device for pre-buried grouting pipes for tunnel lining, wherein a first through hole is opened on a lining trolley template (1), and the pre-buried grouting pipe (3) is placed on the pre-buried steel bars of the lining concrete (4) to be poured; characterized in that: The invention comprises a rubber plug (2); the rubber plug (2) is provided with a second through hole along the axial direction; the left side of the rubber plug (2) abuts against the outside of the lining trolley template (1); and the right side of the rubber plug (2) is inserted into a pre-buried grouting pipe (3); and the invention also comprises a bolt (5) and a nut (6); the bolt (5) passes through the second through hole and the first through hole in sequence; the head of the bolt (5) is located at the right end of the bolt (5) and the head abuts against the right side of the rubber plug (2); the nut (6) is screwed into the left end of the bolt (5) and the nut (6) abuts against the inside of the lining trolley template (1).

2. A fixing device for pre-buried grouting pipes for tunnel lining according to claim 1, characterized in that: The outer side of the rubber stopper (2) is wrapped with a film with butter.

3. A fixing device for pre-buried grouting pipes for tunnel lining according to claim 1, characterized in that: It also includes a first fixing steel bar (7) and a second fixing steel bar (8); one end of the first fixing steel bar (7) is welded to the left side of the pre-buried grouting pipe (3), and the other end is welded to the pre-buried steel bar of the lining concrete (4) to be poured; the second fixing steel bar (8) is horizontal, the left side of the second fixing steel bar (8) is welded to the right side of the pre-buried grouting pipe (3), and the right side is inserted into the soil layer (9).

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