A tunnel concrete secondary lining hollow grouting sealing device

Abstract

The invention discloses a tunnel concrete secondary lining degassing grouting sealing device, which belongs to the technical field of tunnel engineering. The technical scheme is as follows: a sealing steel plate is installed in a groove of a positioning steel plate, the positioning steel plate is fixed at the degassing point of the tunnel secondary lining wall by means of expansion screws, an auxiliary steel plate and a grouting pipe are vertically connected to the auxiliary steel plate and penetrate through the auxiliary steel plate end and squeezed with a rubber ring, the grouting pipe is connected to a cement slurry pump to grout the degassing part, a hammer is used to hammer the sealing steel plate along the longitudinal direction of the groove, a concrete cutting blade is used to cut the rubber ring, and after the concrete cutting blade has cut the rubber ring, the grouting hole is sealed by the sealing steel plate; in this way, the tunnel concrete secondary lining degassing grouting sealing process can be quickly completed.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering, and in particular to a hole sealing device used for hollowing out and grouting of a tunnel concrete secondary lining. Background Art

[0002] At present, after a period of time since the construction of the tunnel concrete secondary lining was completed, due to natural reasons such as the solid settlement and shrinkage of the poured concrete after forming, the tunnel cast concrete secondary lining is prone to vault hollowing and gaps between the side wall waterproofing board and the concrete. This requires the use of a sealing device to inject grout to fill these gaps to ensure the overall quality of the tunnel. A Chinese patent with authorization announcement number CN205908277U discloses a hole sealer device for tunnel concrete secondary lining de-airing grouting, comprising a positioning steel plate close to the concrete surface, a docking hole aligned with the grouting hole is provided in the center of the positioning steel plate, and a quick connector welded to the exposed end of a pre-buried steel pipe in the grouting hole at one end, a high-pressure expansion tube is connected to the other end of the quick connector, a safety valve is installed on the high-pressure expansion tube, the positioning steel plate is formed by welding two equilateral triangular steel plates, three vertex corners of each equilateral triangular steel plate are provided with fixing holes, expansion screws fixed to the concrete surface are arranged in the fixing holes, and a docking hole is provided in the center of each equilateral triangular steel plate; using this grouting hole sealer, the voids in the tunnel can be quickly grouted, and the operation is relatively simple, but because the quick connector is plugged into the positioning steel plate, the quick connector may fall off the positioning steel plate during grouting, thereby affecting the progress of grouting. CN208089309U proposes a sealing device for tunnel soil secondary lining de-hollowing grouting, comprising a positioning steel plate for fitting on the surface of concrete, a grouting hole arranged on the positioning steel plate, an expansion screw arranged on the edge of the positioning steel plate, a quick connector inserted in the grouting hole and a connecting pipe connected to the quick connector, wherein the upper and lower ends of the positioning steel plate are respectively provided with vertical slide grooves, each slide groove is matched and connected with a slider, each slider is fixedly connected with an arc-shaped clamping piece, each clamping piece is respectively clamped on the quick connector, a threaded tube is provided on one end of each slide groove away from the quick connector, each threaded tube is threadedly connected with a threaded rod, and each of the threaded rods is rotatably connected to one side of each slider; in this way, the grouting pipe can be fixed more stably. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution adopted by the patent of the present invention is: a tunnel concrete secondary lining hollow grouting sealing device, including grouting holes, tunnel secondary lining walls, positioning steel plates, auxiliary steel plates, grouting pipes, plugging steel plates, expansion screws, positioning screws, positioning nuts, fixing nuts, rubber rings, and concrete cutting blades. Grouting holes are drilled at the hollow positions in the tunnel secondary lining walls, and rubber rings are arranged around the grouting holes. The grouting holes are attached to the concrete surface as positioning steel plates. The positioning steel plates and the tunnel secondary lining walls are fixed by expansion screws. A groove is designed in the horizontal middle position of the positioning steel plate, and a plugging steel plate is installed in the groove. The outer side of the positioning steel plate is a positioning screw, and a fixing nut is installed on the positioning screw. The outer side of the fixing nut is an auxiliary steel plate, and the outer side of the auxiliary steel plate on the positioning screw is a positioning nut. The grouting pipe is vertically connected to the auxiliary steel plate and passes through the end of the auxiliary steel plate to be extruded and connected with the rubber ring.

[0004] The rubber ring is a variable cross-section rubber ring. The outer diameter of the rubber ring at the small diameter end is consistent with the diameter of the grouting hole, and the inner diameter is 6mm smaller than the outer diameter. The inner diameter of the rubber ring at the large diameter end is consistent with the outer diameter of the grouting pipe.

[0005] The cross section of the plugging steel plate is in the shape of a groove, the interior of the groove is first horizontal and then tilted downward to the grouting hole, then tilted upward and finally horizontal linearly, and the contact position between the plugging steel plate and the grouting hole is a concrete cutting blade.

[0006] Compared with the prior art, the beneficial effects of the present invention are as follows: the plugging steel plate is installed in the groove of the positioning steel plate, the positioning steel plate is fixed at the hollow point of the tunnel secondary lining wall by expansion screws, the auxiliary steel plate and the grouting pipe are vertically connected to the auxiliary steel plate and passed through the auxiliary steel plate end and squeezed with the rubber ring, the grouting pipe is connected to the cement slurry pump to grout the hollow part, the plugging steel plate is hammered along the longitudinal direction of the groove by a hammer, the concrete cutting blade cuts the rubber ring, and when the concrete cutting blade cuts the rubber ring, the grouting hole is blocked by the plugging steel plate; in this way, the tunnel concrete secondary lining hollow grouting and sealing process can be quickly completed. The patent of the present invention has the characteristics of simple structure, convenient operation for operators, safety and reliability, easy operation, and high construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0008] Figure 1 This is the structural front view of the patent of this invention.

[0009] Figure 2 This is a top view of the patent of this invention.

[0010] Figure 3 A is a cross-sectional view.

[0011] Figure 4 It is a cross-sectional view of section B.

[0012] Figure 5 It is a cross-sectional view of the C section.

[0013] Figure 6 This is a top view of the sealing steel plate.

[0014] Figure 7 This is a side view of the sealing steel plate.

[0015] In the figure: grouting hole 1; tunnel secondary lining wall 2; positioning steel plate 3; auxiliary steel plate 4; grouting pipe 5; blocking steel plate 6; expansion screw 7; positioning screw 8; positioning nut 9; fixing nut 10; rubber ring 11, concrete cutting blade 12. DETAILED DESCRIPTION

[0016] like Figure 1-Figure 7 A tunnel concrete secondary lining de-hollowing grouting and sealing device is disclosed, comprising a grouting hole 1, a tunnel secondary lining wall 2, a positioning steel plate 3, an auxiliary steel plate 4, a grouting pipe 5, a plugging steel plate 6, an expansion screw 7, a positioning screw 8, a positioning nut 9, a fixing nut 10, an apron 11, and a concrete cutting blade 12. The grouting hole 1 is drilled at a de-hollowing position in the tunnel secondary lining wall 2, and a rubber ring 11 is arranged around the grouting hole 1. The grouting hole 1 is attached to the concrete surface as the positioning steel plate 3, and the positioning steel plate 3 is fixed to the tunnel secondary lining wall 2 by the expansion screw 7. A groove is designed at the horizontal middle position of the positioning steel plate 3, and the plugging steel plate 6 is installed in the groove. The outer side of the positioning steel plate 3 is the positioning screw 8, and the fixing nut 10 is installed on the positioning screw 8. The outer side of the fixing nut 10 is the auxiliary steel plate 4, and the outer side of the auxiliary steel plate 4 on the positioning screw 8 is the positioning nut 9. The grouting pipe 5 is vertically connected to the auxiliary steel plate 4 and passes through the end of the auxiliary steel plate 4 and is extruded and connected with the apron 11.

[0017] The rubber ring 11 is a variable cross-section rubber ring. The outer diameter of the rubber ring 11 at the small diameter end is consistent with the diameter of the grouting hole 1, and the inner diameter is 6 mm smaller than the outer diameter. The inner diameter of the rubber ring 11 at the large diameter end is consistent with the outer diameter of the grouting pipe 5.

[0018] The cross section of the sealing steel plate 6 is in the shape of a groove, the interior of the groove is first horizontal and then tilted downward to the grouting hole 1, then tilted upward and finally horizontal linearly. The contact position between the sealing steel plate 6 and the grouting hole 1 is the concrete cutting blade 12.

[0019] How it works

[0020] After the construction of the secondary lining of the tunnel, a void detection is carried out through detection equipment. After the void point is detected, a marker is used to mark the void point of the secondary lining wall of the tunnel, and a hole is drilled to the void point to form a grouting hole 1. An rubber ring 11 is installed at the grouting hole mouth, and then the positioning steel plate 3 is placed near the grouting hole 1. When it is ensured that the grouting hole 1 corresponds to the rubber ring 11 at the center position of the positioning steel plate 3, a marker is used to mark the hole of the expansion screw 7, and a hole is drilled at the marked position to prepare for the installation of the expansion screw 7.

[0021] Install the blocking steel plate 6 in the groove 13 of the positioning steel plate 3, fix the positioning steel plate 3 at the hollow point of the tunnel secondary lining wall 2 by means of the expansion screws 7, install the positioning screws 8 on the outer side of the positioning steel plate 3 in place, install the fixing nuts 10 on the positioning screws 8, connect the auxiliary steel plate 4 and the grouting pipe 5 vertically and pass through the end of the auxiliary steel plate 4 to be squeezed with the rubber ring 11, and ensure that the grouting pipe 5 is in close contact with the rubber ring 11 without leakage by adjusting the positioning nuts 9 and the fixing nuts 10.

[0022] Connect the grouting pipe 5 to the cement slurry pump to grout the empty parts. When the cement slurry fully fills the empty points, stabilize the pressure for three minutes, and use a hammer to hammer the sealing steel plate 6 along the groove 13 longitudinally to make the concrete cutting blade 12 cut the rubber ring 11. After the concrete cutting blade 12 has cut the rubber ring 11, the grouting hole 1 is sealed by the sealing steel plate 6.

[0023] The auxiliary steel plate 4 and the grouting pipe 5 are unloaded by adjusting the positioning nut 9. When the cement slurry strength reaches 90%, the expansion screw 7 is unloaded. The positioning steel plate 3 is unloaded, the expansion screw 7 is cut, and the expansion screw hole is sealed to complete the tunnel concrete secondary lining de-hollowing grouting and sealing.

[0024] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The embodiments and features in the embodiments of the present application can be combined with each other in any way without conflict. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A tunnel concrete secondary lining hollow grouting sealing device, characterized in that it comprises a grouting hole (1), a tunnel secondary lining wall (2), a positioning steel plate (3), an auxiliary steel plate (4), a grouting pipe (5), a plugging steel plate (6), an expansion screw (7), a positioning screw (8), a positioning nut (9), a fixing nut (10), an apron (11), a concrete cutting blade (12), and a groove (13). A grouting hole (1) is drilled at a hollow position in the tunnel secondary lining wall (2), a rubber ring (11) is arranged around the grouting hole (1), a positioning steel plate (3) is attached to the surface of the concrete, the positioning steel plate (3) is fixed to the tunnel secondary lining wall (2) by means of an expansion screw (7), and a grouting hole (11) is provided in the middle of the lateral direction of the positioning steel plate (3). A groove (13) is designed at the intermediate position, a plugging steel plate (6) is installed in the groove (13), a positioning screw (8) is provided on the outer side of the positioning steel plate (3), a fixing nut (9) is installed on the positioning screw (8), an auxiliary steel plate (4) is provided on the outer side of the fixing nut (9), a positioning nut (9) is provided on the positioning screw (8) and on the outer side of the auxiliary steel plate (4), a grouting pipe (5) is vertically connected to the auxiliary steel plate (4) and passes through the end of the auxiliary steel plate (4) and is extruded and connected with the rubber ring (11), the cross section of the plugging steel plate (6) is concave, the longitudinal direction inside the groove (13) is first horizontal and then tilted downward to the grouting hole (1), then tilted upward and finally presents a horizontal linear shape, and the contact position between the plugging steel plate (6) and the grouting hole (1) is a concrete cutting blade (12).

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