Plugging device for tunnel secondary lining back backfill grouting pipe

Abstract

The utility model discloses a tunnel secondary lining back backfill grouting pipe plugging device, which relates to the technical field of grouting pipe plugging and comprises a grouting steel pipe and a plugging mechanism arranged at a pipe orifice of the grouting steel pipe. The plugging mechanism comprises a plugging plate movably arranged in the grouting steel pipe matched with the plugging plate, a length-adjustable connecting frame arranged on one side of the plugging plate, and a baffle ring arranged on one side of the connecting frame and abutting against the outer wall of a pipe opening of the grouting steel pipe in a matched mode. The pipe opening of the grouting steel pipe is blocked by the elastic shrinkage material piece, the blocking plate and other structures, the pipe opening is blocked to prevent concrete grout from flowing in, the elastic shrinkage material piece can protrude out of the concrete surface after formwork removal, and therefore the position of the grouting steel pipe can be found conveniently, and later-period backfill grouting can be conducted after the grouting steel pipe is taken out. And when the structures such as the blocking plate are taken out, the blocking plate can scrape off the elastic shrinkage material piece remaining on the inner wall of the pipe opening of the grouting steel pipe, and the situation that the elastic shrinkage material piece is left in the pipe opening and influences the later-period backfill grouting effect is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of grouting pipe blocking, in particular to a tunnel secondary lining backfill grouting pipe blocking device. Background Art

[0002] A tunnel secondary lining is a structure in underground tunnels, typically constructed of precast concrete decks and brackets fixed to the tunnel walls. Its purpose is to protect the tunnel walls and strengthen the tunnel's load-bearing capacity. It can also prevent tunnel collapse and minimize impacts on surface structures.

[0003] The location of the secondary lining in an underground tunnel depends on factors such as geological conditions, tunnel shape, and design requirements. Generally speaking, the secondary lining should be located on the inner side of the tunnel, away from surface buildings, to protect the tunnel from surface loads and guide them underground.

[0004] In tunnel construction, in order to ensure dense filling between the primary and secondary linings, backfill grouting pipes need to be pre-buried during the secondary lining concrete construction. The secondary lining construction mostly uses steel formwork or steel formwork trolleys, and the grouting pipes are usually steel pipes. The ends of the grouting pipes need to be tightly attached to the exposed steel formwork during backfill construction. However, during backfilling and pouring, the concrete slurry can easily flow into the pipe from the mouth of the grouting pipe, thereby blocking the mouth of the grouting pipe, making it difficult for workers to find the position of the grouting pipe after removing the formwork, resulting in problems such as inability to grout in the later stage. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model provides a tunnel secondary lining backfill grouting pipe sealing device. The specific technical solution is as follows:

[0006] A device for plugging a grouting pipe for backfilling a tunnel secondary lining includes a grouting steel pipe and a plugging mechanism provided at the orifice of the grouting steel pipe. The plugging mechanism includes a plugging plate movably provided in a corresponding grouting steel pipe, a length-adjustable connecting frame provided on one side of the plugging plate, and a retaining ring provided on one side of the connecting frame and cooperating with and abutting against the outer wall of the orifice of the grouting steel pipe. The orifice of the grouting steel pipe, the gaps on one side of the plugging plate, and between the connecting frame and the retaining ring are filled with elastic shrinkage material.

[0007] The sealing plate is provided with a fixing mechanism for fixing the sealing mechanism by pressing against the inner wall of the grouting steel pipe.

[0008] By adopting the above technical solution, elastic shrinkage material parts and sealing plates are used to seal the pipe mouth of the grouting steel pipe to prevent the inflow of concrete slurry. After the mold is removed, the elastic shrinkage material parts will bulge out of the concrete surface, making it easier to find the position of the grouting steel pipe. After it is taken out, backfilling and grouting can be carried out later.

[0009] Optionally, the connecting frame includes a fixed sleeve rod fixed on one side of the retaining ring and located inside the grouting steel pipe, and a threaded rod threaded in one end of the fixed sleeve rod, and one end of the threaded rod is in contact with the outer wall of the sealing plate.

[0010] By adopting the above technical solution, the threaded rod can move laterally on one side of the fixed sleeve rod after rotation, thereby adjusting the overall length of the connecting frame. By adjusting the length of the connecting frame, the depth of the sealing plate entering the grouting steel pipe can be controlled, which is convenient for sealing elastic shrinkage material pieces of different volumes in the pipe mouth of the grouting steel pipe.

[0011] Optionally, a plurality of grooves are provided on the outer wall of the sealing plate, and the fixing mechanism includes a trapezoidal block which is slidably arranged in the groove of the sealing plate and abuts against the inner wall of the grouting steel pipe, and a magnetic mechanism provided in the groove of the sealing plate for pressing the trapezoidal block toward the inner wall of the grouting steel pipe by repulsion. The magnetic mechanism includes a first annular magnet fixed on the inner wall of the groove of the sealing plate, and a second annular magnet fixed on the side of the trapezoidal block close to the first annular magnet, and the magnetic poles on the opposite sides of the first annular magnet and the second annular magnet are of the same polarity.

[0012] By adopting the above technical solution, the trapezoidal block can be pressed against the inner wall of the grouting steel pipe through the repulsive force of the first annular magnet and the second annular magnet, combined with the magnetic attraction between the second annular magnet and the grouting steel pipe, thereby fixing the sealing component inside the grouting steel pipe.

[0013] Optionally, one end of the trapezoidal block is provided with a guiding slope for guiding the trapezoidal block into the groove when the sealing plate is inserted into the grouting steel pipe.

[0014] By adopting the above technical solution, the trapezoidal block will automatically retract into the groove under the guidance of the guiding inclined surface.

[0015] Optionally, a limiting groove is provided in the middle of one side of the sealing plate close to the second annular magnet, a connecting plate with a diameter larger than the inner diameter of the second annular magnet is slidably provided in the limiting groove of the sealing plate, and a connecting rod is fixed between the groove of the sealing plate and the connecting plate.

[0016] By adopting the above technical solution, the connecting plate and the connecting rod can connect the trapezoidal block and the blocking plate, so that the trapezoidal block will not be separated from the blocking plate.

[0017] Optionally, a fixing groove is provided on one side of the trapezoidal block close to the inner wall of the grouting steel pipe, and a non-slip rubber block is provided in the fixing groove of the trapezoidal block, which cooperates to abut against the inner wall of the grouting steel pipe. A rubber clamping block is fixed on one side of the non-slip rubber block, and the rubber clamping block cooperates to be clamped in the fixing groove of the trapezoidal block.

[0018] By adopting the above technical solution, due to the anti-slip effect of the anti-slip rubber block, the trapezoidal block and sealing plate and other components in the grouting steel pipe can be further fixed. After the rubber block is inserted into the fixing groove, the trapezoidal block and the anti-slip rubber block can be connected and fixed.

[0019] In summary, the present invention has at least one of the following beneficial effects:

[0020] 1. By using elastic shrinkage materials and sealing plates and other structures to seal the orifice of the grouting steel pipe, the orifice is blocked to prevent the inflow of concrete slurry. After the formwork is removed, the elastic shrinkage material will bulge out of the concrete surface, making it easier to find the position of the grouting steel pipe. After taking it out, the subsequent backfilling and grouting can be carried out. When the sealing plate and other structures are taken out, the sealing plate will scrape off the elastic shrinkage material remaining on the inner wall of the orifice of the grouting steel pipe to avoid the elastic shrinkage material remaining in the orifice and affecting the effect of the subsequent backfilling and grouting.

[0021] 2. Through the repulsive force of the first annular magnet and the second annular magnet, combined with the magnetic attraction of the second annular magnet and the grouting steel pipe, the trapezoidal block can be pressed against the inner wall of the grouting steel pipe, and combined with the anti-slip effect of the anti-slip rubber block, the sealing components in the grouting steel pipe can be fixed, so that the elastic shrinkage material and other sealing components are not easily moved at will and gaps are formed between them and the inner wall of the grouting steel pipe, thereby ensuring the sealing effect of the grouting steel pipe. The sealing plate and other components are completely stuffed into the grouting steel pipe as a whole, and the elastic shrinkage material is filled in the pipe mouth to complete the sealing process, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a front cross-sectional view of the overall structure of the utility model;

[0024] Figure 3 This utility model Figure 2 A magnified view of the structure of the middle sealing plate;

[0025] Figure 4 It is a side view of the connection between the blocking plate and the threaded rod of the utility model.

[0026] Explanation of the accompanying drawings: 1. Grouting steel pipe; 2. Sealing plate; 21. Groove; 22. Trapezoidal block; 23. First annular magnet; 24. Second annular magnet; 25. Guide slope; 26. Limiting groove; 27. Connecting plate; 28. Connecting rod; 29. ​​Fixed groove; 3. Fixed sleeve rod; 31. Threaded rod; 4. Retaining ring; 5. Elastic shrinkage material piece; 6. Anti-slip rubber block; 61. Rubber clamp block. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-4 The utility model is described in further detail.

[0028] The utility model embodiment discloses a tunnel secondary lining backfill grouting pipe sealing device, referring to Figure 1-2 , including a grouting steel pipe 1 and a blocking mechanism. The grouting steel pipe 1 is a grouting pipe used for backfilling the secondary lining of an existing tunnel. The blocking mechanism can block the pipe opening of the grouting steel pipe 1.

[0029] Reference Figure 1-2 The sealing mechanism includes a sealing plate 2 movably arranged in the corresponding grouting steel pipe 1, a connecting frame with adjustable length arranged on one side of the sealing plate 2, and a retaining ring 4 arranged on one side of the connecting frame and cooperating with the outer wall of the pipe mouth of the grouting steel pipe 1. The connecting frame can connect the sealing plate 2 and the retaining ring 4. The retaining ring 4 will be tightly attached to the exposed steel mold during backfill construction. The retaining ring 4 resting on the outer wall of the pipe mouth of the grouting steel pipe 1 can limit the sealing plate 2 and the connecting frame, and the sealing mechanism can be directly removed from the grouting steel pipe 1 as a whole by pulling the retaining ring 4 at a later stage, and the sealing plate 2 can seal the grouting steel pipe 1.

[0030] Reference Figure 1-3 The inside of the grouting steel pipe 1, the gap between one side of the sealing plate 2, and the connecting frame and the retaining ring 4 are filled with elastic shrinkage material pieces 5. The elastic shrinkage material pieces 5 can be materials such as polyethylene closed-cell foam that are elastic and can temporarily shrink after being compressed. The elastic shrinkage material pieces 5 can seal the inside of the grouting steel pipe 1, and during backfill construction, the elastic shrinkage material pieces 5 will be tightly attached to the exposed steel mold and temporarily shrink to the inside of the grouting steel pipe 1 under the extrusion of the steel mold. After the mold is removed, the elastic shrinkage material pieces 5 will bulge out of the concrete surface under the elastic force, making it convenient to find the position of the grouting steel pipe 1.

[0031] Reference Figure 2 and Figure 4 The connecting frame includes a fixed sleeve rod 3 fixed on one side of the retaining ring 4 and located inside the grouting steel pipe 1, and a threaded rod 31 threaded in one end of the fixed sleeve rod 3, one end of the threaded rod 31 cooperates and abuts against the outer wall of the sealing plate 2, and a threaded hole is opened in the fixed sleeve rod 3, and one end of the threaded rod 31 is threadedly connected to the threaded hole of the fixed sleeve rod 3. After the threaded rod 31 is rotated, it can move laterally on one side of the fixed sleeve rod 3, thereby adjusting the overall length of the connecting frame. By adjusting the length of the connecting frame, the depth to which the sealing plate 2 enters the grouting steel pipe 1 can be controlled, which is convenient for sealing elastic shrinkage material pieces 5 of different volumes in the pipe mouth of the grouting steel pipe 1.

[0032] Reference Figure 2-3A number of grooves 21 are provided on the outer wall of the sealing plate 2, and a fixing mechanism is provided inside the sealing plate 2 for fixing the sealing mechanism by abutting against the inner wall of the grouting steel pipe 1. The fixing mechanism includes a trapezoidal block 22 which is slidably arranged in the groove 21 of the sealing plate 2 and abuts against the inner wall of the grouting steel pipe 1, and a magnetic mechanism which is provided in the groove 21 of the sealing plate 2 and is used to press the trapezoidal block 22 against the inner wall of the grouting steel pipe 1 through repulsion. Under the repulsive force of the magnetic mechanism, the trapezoidal block 22 is pressed against the inner wall of the grouting steel pipe 1, thereby fixing the sealing structure such as the sealing plate 2 and the elastic shrinkage material part 5 to the inner wall of the grouting steel pipe 1.

[0033] Reference Figure 2-3 The magnetic mechanism includes a first annular magnet 23 fixed on the inner wall of the groove 21 of the sealing plate 2, and a second annular magnet 24 fixed on the side of the trapezoidal block 22 close to the first annular magnet 23. The magnetic poles of the first annular magnet 23 and the second annular magnet 24 on the opposite sides are of the same polarity. The first annular magnet 23 and the second annular magnet 24 repel each other with the same polarity. Combined with the magnetic attraction between the second annular magnet 24 and the grouting steel pipe 1, the trapezoidal block 22 can be strongly pressed against the inner wall of the grouting steel pipe 1.

[0034] Reference Figure 2-3 One end of the trapezoidal block 22 is provided with a guide slope 25 for pressing the trapezoidal block 22 into the groove 21 by guiding when the sealing plate 2 is inserted into the grouting steel pipe 1. When the sealing plate 2 is inserted into the grouting steel pipe 1, the trapezoidal block 22 will automatically retract into the groove 21 under the guidance of the guide slope 25, so that the trapezoidal block 22 will not hinder the continued movement of the sealing plate 2.

[0035] Reference Figure 2-3 A limiting groove 26 is provided in the middle part of one side of the blocking plate 2 close to the second annular magnet 24. A connecting plate 27 with a diameter larger than the inner diameter of the second annular magnet 24 is slidably provided in the limiting groove 26 of the blocking plate 2. A connecting rod 28 is fixed between the groove 21 of the blocking plate 2 and the connecting plate 27. The limiting groove 26 and the second annular magnet 24 can limit the connecting plate 27 so that the connecting plate 27 can move in the limiting groove 26 without detaching. Both the connecting plate 27 and the connecting rod 28 can connect the trapezoidal block 22 and the blocking plate 2, so that the trapezoidal block 22 will not detach from the blocking plate 2.

[0036] Reference Figure 2-3A fixing groove 29 is provided on one side of the trapezoidal block 22 close to the inner wall of the grouting steel pipe 1, and an anti-slip rubber block 6 is provided in the fixing groove 29 of the trapezoidal block 22, which abuts against the inner wall of the grouting steel pipe 1. A rubber clamping block 61 is fixed on one side of the anti-slip rubber block 6, and the rubber clamping block 61 is clamped in the fixing groove 29 of the trapezoidal block 22. The anti-slip rubber block 6 will be pressed against the inner wall of the grouting steel pipe 1 with the trapezoidal block 22. Due to the anti-slip effect of the anti-slip rubber block 6, the trapezoidal block 22 and the sealing plate 2 and other components in the grouting steel pipe 1 can be further fixed. After the rubber clamping block 61 is clamped into the fixing groove 29, the trapezoidal block 22 and the anti-slip rubber block 6 can be connected and fixed. After the anti-slip rubber block 6 is worn in the later stage, the staff can pull out the rubber clamping block 61 to replace the anti-slip rubber block 6.

[0037] The implementation principle of the tunnel secondary lining backfill grouting pipe sealing device of the utility model embodiment is:

[0038] When in use, the staff can insert the sealing plate 2 and other components into the pipe mouth of the grouting steel pipe 1 until the retaining ring 4 rests on the outer wall of the pipe mouth of the grouting steel pipe 1, and then fill the gaps between the pipe mouth of the grouting steel pipe 1, the retaining ring 4 and the sealing plate 2 and other components with elastic shrinkage material 5. At this time, the elastic shrinkage material 5 and the sealing plate 2 and other components can seal the pipe mouth of the grouting steel pipe 1 to block the pipe mouth and prevent the concrete slurry from flowing in. After the mold is removed, the elastic shrinkage material 5 will bulge out of the concrete surface, making it easy to find the position of the grouting steel pipe 1. After taking it out, backfilling and grouting can be carried out later.

[0039] When it is necessary to remove the elastic shrink material 5 and the sealing plate 2 and other structures in the pipe orifice, the staff can directly pull the blocking ring 4 to pull out the blocking mechanism and the elastic shrink material 5 from the grouting steel pipe 1 as a whole. At this time, the sealing plate 2 will scrape off the elastic shrink material 5 remaining on the inner wall of the pipe orifice of the grouting steel pipe 1, so as to avoid the elastic shrink material 5 remaining in the pipe orifice and affecting the effect of the subsequent backfill grouting;

[0040] When the sealing plate 2 and other components are completely inserted into the pipe mouth of the grouting steel pipe 1, the repulsive force of the first annular magnet 23 and the second annular magnet 24, combined with the magnetic attraction between the second annular magnet 24 and the grouting steel pipe 1, can press the trapezoidal block 22 against the inner wall of the grouting steel pipe 1, and cooperate with the anti-slip of the anti-slip rubber block 6 to fix the sealing components in the grouting steel pipe 1, so that the elastic shrinkage material parts 5 and other sealing components are not easy to move at will and form gaps between them and the inner wall of the grouting steel pipe 1, thereby ensuring the sealing effect of the grouting steel pipe 1.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for sealing a grouting pipe for backfilling a tunnel secondary lining, comprising a grouting steel pipe (1) and a sealing mechanism provided at the pipe opening of the grouting steel pipe (1), characterized in that: The blocking mechanism comprises a blocking plate (2) movably arranged in a corresponding grouting steel pipe (1), a connecting frame arranged on one side of the blocking plate (2) and having an adjustable length, and a retaining ring (4) arranged on one side of the connecting frame and cooperating with and abutting against the outer wall of the grouting steel pipe (1) orifice. The orifice of the grouting steel pipe (1), the gap between the one side of the blocking plate (2), the connecting frame and the retaining ring (4) are filled with an elastic shrinkage material (5); The blocking plate (2) is provided with a fixing mechanism for fixing the blocking mechanism by abutting against the inner wall of the grouting steel pipe (1).

2. The tunnel secondary lining backfill grouting pipe sealing device according to claim 1 is characterized by: The connecting frame comprises a fixed sleeve rod (3) fixed on one side of the retaining ring (4) and located inside the grouting steel pipe (1), and a threaded rod (31) threaded inside one end of the fixed sleeve rod (3), and one end of the threaded rod (31) is in contact with the outer wall of the sealing plate (2).

3. The device for sealing the tunnel secondary lining backfill grouting pipe according to claim 1, characterized in that: The outer wall of the blocking plate (2) is provided with a plurality of grooves (21), and the fixing mechanism comprises a trapezoidal block (22) which is slidably arranged in the groove (21) of the blocking plate (2) and cooperates with and abuts against the inner wall of the grouting steel pipe (1), and a magnetic mechanism which is arranged in the groove (21) of the blocking plate (2) and is used to press the trapezoidal block (22) toward the inner wall of the grouting steel pipe (1) through repulsive force.

4. The device for plugging the tunnel secondary lining backfill grouting pipe according to claim 3 is characterized in that: The magnetic mechanism comprises a first annular magnet (23) fixedly arranged on the inner wall of the groove (21) of the sealing plate (2), and a second annular magnet (24) fixedly arranged on a side of the trapezoidal block (22) close to the first annular magnet (23), wherein the magnetic poles on opposite sides of the first annular magnet (23) and the second annular magnet (24) are of the same polarity.

5. The device for sealing the tunnel secondary lining backfill grouting pipe according to claim 4, characterized in that: One end of the trapezoidal block (22) is provided with a guide slope (25) for guiding the trapezoidal block (22) to be pressed into the groove (21) when the sealing plate (2) is inserted into the grouting steel pipe (1).

6. The device for plugging the tunnel secondary lining backfill grouting pipe according to claim 5, characterized in that: A limiting groove (26) is provided in the middle of one side of the blocking plate (2) close to the second annular magnet (24); a connecting plate (27) having a diameter larger than the inner diameter of the second annular magnet (24) is slidably provided in the limiting groove (26) of the blocking plate (2); and a connecting rod (28) is fixedly provided between the groove (21) of the blocking plate (2) and the connecting plate (27).

7. The device for plugging the tunnel secondary lining backfill grouting pipe according to claim 6, characterized in that: A fixing groove (29) is provided on one side of the trapezoidal block (22) close to the inner wall of the grouting steel pipe (1), and an anti-slip rubber block (6) is provided in the fixing groove (29) of the trapezoidal block (22) and is in contact with the inner wall of the grouting steel pipe (1).

8. The device for plugging the tunnel secondary lining backfill grouting pipe according to claim 7, characterized in that: A rubber clamping block (61) is fixedly provided on one side of the anti-slip rubber block (6), and the rubber clamping block (61) is engaged and clamped in the fixing groove (29) of the trapezoidal block (22).

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