A leaking plugging tool and method for segment hoisting hole

Abstract

The application discloses a leaking stoppage tool and method for pipe piece hoisting holes, and belongs to the technical field of building construction. The tool comprises: a plug which is inserted into a grouting pipe pre-buried in a pipe piece hoisting hole and is in sealed connection with the grouting pipe; and a blanking head assembly which is pressed against the outer surface of the plug and the pipe piece hoisting hole, at this time, the blanking head assembly and the inner arc surface of the pipe piece hoisting hole together form a grouting cavity, wherein the gap between the grouting pipe and the concrete pipe piece forms a water seepage channel, the grouting cavity is in communication with the water seepage channel, and slurry is injected into the water seepage channel from the grouting cavity through pressure to seal the water seepage point. When the leaking stoppage tool is installed, the work of sealing the water seepage point can be completed by only injecting the slurry into the water seepage channel from the grouting cavity through pressure, then the tool is disassembled, and the residual slurry in the grouting cavity is cleaned, so that the whole operation process is simple and convenient, the grouting amount is small, the economy is high, and the leaking stoppage effect is excellent.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a leak-stopping tool and method for leaks at the segment hoisting hole. Background Technology

[0002] After the tunnel segment tunneling is completed, under water and soil pressure, if the concrete has poor impermeability or there are connecting channels inside and outside the concrete, seepage points will appear on the inner arc surface of the segment. The grouting pipes in the segment hoisting holes are mostly metal embedded parts, coated with Dacromet and then an anti-alkali coating. If the anti-alkali coating is of poor quality, does not fully cover the Dacromet, or is damaged during production, the Dacromet will react with cement hydration products to produce gas. As the gas escapes upwards from the concrete, it creates channels within the concrete. Under water pressure, these channels become seepage channels in the segment concrete, resulting in seepage around the hoisting (grouting) holes on the inner arc surface of the segment (within a range of 0-2mm).

[0003] For seepage on the outside of this type of grouting pipe, the seepage point is difficult to find, and it is impossible to directly drill holes at the seepage point on the inside to fix the grouting head for grouting. In actual projects, for seepage points with a small amount of seepage, some can heal themselves after a period of carbonization reaction. Other seepage points that cannot heal can only be waterproofed by injecting grout between the inner arc surface of the pipe segment and the soil through methods such as injecting double-liquid grout behind the pipe segment wall. This waterproofing method requires a large amount of grout, is not economical, and the effect of sealing the leak is uncontrollable. Summary of the Invention

[0004] This invention addresses the aforementioned problems in the existing technology by proposing a leak-sealing tool and method for leaking at the segment hoisting hole.

[0005] This invention can be achieved through the following technical solutions:

[0006] A leak-sealing tool for leakage at segment hoisting holes, comprising:

[0007] The plug is inserted into the grouting pipe pre-embedded in the segment hoisting hole and is sealed to the grouting pipe;

[0008] The plug assembly is pressed against the outer surface of the plug and the segment hoisting hole. At this time, the plug assembly and the inner arc surface of the segment hoisting hole form a grouting cavity. The gap between the grouting pipe and the concrete segment forms a seepage channel. The grouting cavity is connected to the seepage channel. Grout is injected into the seepage channel from the grouting cavity under pressure to seal the seepage point.

[0009] As a further improvement of the present invention, the end cap assembly includes an end cap, and the end cap, the plug, and the segment hoisting hole are respectively provided with a first sealing ring and a second sealing ring.

[0010] As a further improvement of the present invention, the plug and the segment hoisting hole are surrounded by the first sealing ring and the second sealing ring to form the grouting cavity.

[0011] As a further improvement of the present invention, the plug is threadedly connected to the grouting pipe and a third sealing ring is provided between the two.

[0012] As a further improvement of the present invention, the third sealing ring is located at the top of the plug, and the third sealing ring abuts against the first sealing ring. The first sealing ring, the second sealing ring and the third sealing ring make the grouting cavity communicate only with the seepage channel.

[0013] As a further improvement of the present invention, the end cap is provided with a grouting hole, which is connected to the grouting cavity and used to connect the grouting head of an external grouting device.

[0014] As a further improvement of the present invention, the plug assembly also includes a screw that passes through the plug and abuts against the end cap, while the plug is pressed against the end cap and the surface of the concrete segment by screwing a nut onto the screw.

[0015] A method for sealing leakage at the segment hoisting hole is also provided, employing the aforementioned sealing fixture, including:

[0016] S1. Screw the plug onto the internal thread of the grouting pipe;

[0017] S2. Press the end cap tightly onto the surface of the plug and the concrete segment, so that the end cap and the inner arc surface of the concrete segment enclose a grouting cavity.

[0018] S3. The grout is injected under pressure from the grouting cavity into the seepage channel between the grouting pipe and the concrete segment to seal the seepage point.

[0019] As a further improvement of the present invention, in step S1, the third sealing ring is installed between the plug and the grouting pipe.

[0020] As a further improvement of the present invention, in step S2, the first sealing ring and the second sealing ring are respectively installed between the end cap, the plug, and the surface of the concrete segment, wherein the first sealing ring abuts against the third sealing ring, so that the grouting cavity is only connected to the seepage channel.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Once the leak-sealing tool is installed, simply inject the grout into the seepage channel through the grouting cavity under pressure to seal the seepage point. Then, disassemble the tool and clean the grout remaining in the grouting cavity. The whole operation is simple and convenient, with a small grouting volume, high economy, and excellent leak-sealing effect.

[0023] 2. A first sealing ring and a second sealing ring are respectively provided at the clamping points between the plug and the segment hoisting hole. At this time, the plug and the segment hoisting hole are surrounded by the first sealing ring and the second sealing ring to form a grouting cavity, thereby ensuring the sealing performance of the grouting cavity and preventing the grout from leaking outward during the grouting process.

[0024] 3. The plug is threadedly connected to the grouting pipe and a third sealing ring is provided between them. The third sealing ring is located at the top of the plug and abuts against the first sealing ring. This ensures that the grout injected into the grouting cavity will not flow in from the thread gap between the plug and the grouting pipe, so that the grouting cavity is only connected to the seepage channel, thereby ensuring excellent leak-stopping effect.

[0025] 4. The leak-sealing tool has a simple structure, is easy to install and disassemble, reduces loading and unloading time, and improves work efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the leak-sealing tool for the segment hoisting hole of the present invention after installation;

[0027] Figure 2 This is the invention Figure 1 A magnified view of a portion of point A in the middle.

[0028] In the figure, 100 is the plug; 110 is the end cap assembly; 111 is the end cap; 1111 is the grouting hole; 112 is the screw; 113 is the nut; 120 is the grouting cavity; 130 is the first sealing ring; 140 is the first sealing ring; 150 is the third sealing ring; 200 is the grouting pipe; and 210 is the concrete segment. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical methods of the present invention. However, the present invention is not limited to these embodiments.

[0030] like Figure 1-2 As shown, the present invention provides a leak-sealing tool for leakage at the segment hoisting hole, comprising:

[0031] The plug 100 is inserted into the grouting pipe 200 pre-embedded in the segment hoisting hole and is sealed to the grouting pipe 200 to prevent grout from entering the grouting pipe 200.

[0032] The plug assembly 110 is pressed against the outer surface of the plug 100 and the concrete segment 210. At this time, the plug assembly 110 and the inner arc surface of the segment hoisting hole form a grouting cavity 120, which is connected to the seepage channel (not shown in the figure).

[0033] It should be noted that after the grouting pipe 200 is pre-embedded in the segment hoisting hole, there will inevitably be a seepage channel that is difficult to be detected by the naked eye between the grouting pipe 200 and the concrete segment 210. In this embodiment, the seepage point can be sealed by simply injecting grout from the grouting cavity 120 into the seepage channel under pressure. Then, the tooling can be disassembled and the residual grout in the grouting cavity 120 can be cleaned. The whole operation process is simple and convenient, with a small grouting volume, high economy, and excellent leak-stopping effect.

[0034] Preferably, the plug assembly 110 includes a plug 111, wherein a first sealing ring 130 and a second sealing ring 140 are respectively provided at the pressing points between the plug 111 and the plug 100 and the segment hoisting hole. At this time, the plug 100 and the segment hoisting hole are surrounded by the first sealing ring 130 and the second sealing ring 140 to form a grouting cavity 120, thereby ensuring the sealing performance of the grouting cavity 120 and preventing the grout from leaking outward during the grouting process.

[0035] Preferably, the plug 100 is threadedly connected to the grouting pipe 200 and a third sealing ring 150 is provided between them. The third sealing ring 150 is located at the top of the plug 100 and abuts against the first sealing ring 130. This ensures that the grout injected into the grouting cavity 120 will not flow in from the threaded gap between the plug 100 and the grouting pipe 200, so that the grouting cavity 120 is only connected to the seepage channel, thereby ensuring an excellent leak-stopping effect.

[0036] Preferably, the plug 111 has a grouting hole 1111, which is connected to the grouting cavity 120 and used to connect the grouting head of an external grouting device. Specifically, after the plug 111 and plug 100 are installed and the sealing performance of each sealing ring is checked, the grouting head of a portable high-pressure grouting machine is connected to the grouting hole 1111 on the plug 111 for pressure grouting. The grouting fluid is epoxy resin grouting material, which conforms to the standard of JC / T1041-2007 "Epoxy Resin Grouting Material for Concrete Cracks". The grouting pressure is about 0.5 to 0.7 MPa to ensure that the epoxy resin can be smoothly injected into the seepage channel between the grouting pipe 200 and the concrete segment 210 under pressure to seal the seepage point.

[0037] Preferably, the plug assembly 110 further includes a screw 112, which passes through the plug 111 and abuts against the end cap 100. At the same time, by screwing a nut 113 into the screw 112, the plug 111 is pressed against the end cap 100 and the surface of the tube segment, ensuring that the entire plug 111 can be pressed against the end cap 100. This allows the first sealing ring 130 and the second sealing ring 140 to achieve a good sealing effect after being pressed.

[0038] This invention also provides a method for sealing leakage at the segment hoisting hole, employing the aforementioned sealing fixture, including:

[0039] S1. Screw the plug 100 onto the internal thread of the grouting pipe 200;

[0040] S2. Press the end cap 111 tightly onto the surface of the end cap 100 and the concrete segment 210, so that the end cap 111 and the inner arc surface of the concrete segment 210 enclose a grouting cavity 120.

[0041] S3. The grout is injected under pressure from the grouting cavity 120 into the seepage channel between the grouting pipe 200 and the concrete segment 210 to seal the seepage point.

[0042] Preferably, in step S1, a third sealing ring 150 is installed between the plug 100 and the grouting pipe 200 to ensure that grout will not be injected from the threaded gap between the plug 100 and the grouting pipe 200 during the grouting process.

[0043] Preferably, in step S2, a first sealing ring 130 and a second sealing ring 140 are installed between the plug 111, the end cap 100, and the surface of the segment, respectively. The first sealing ring 130 abuts against the third sealing ring 150. The end cap 100 and the segment lifting hole are enclosed by the first sealing ring 130 and the second sealing ring 140 to form a grouting cavity 120. That is to say, the entire grouting cavity 120 is only connected to the seepage channel between the grouting pipe 200 and the concrete segment 210. As the grout is injected under pressure from the grouting cavity 120, the grout can smoothly enter the seepage channel and achieve the purpose of sealing the seepage point.

[0044] In addition, the grouting construction procedure is as follows:

[0045] 1. Cleaning of defective areas: Clean water stains, oil stains, mud and other dirt from the grouting area (i.e., the grouting cavity) to prepare for subsequent grouting construction.

[0046] 2. Sealing of segment hoisting holes and grouting areas: Install this sealing tool to seal the segment hoisting holes and grouting areas. For grouting hole 1111, use threaded plug 100 and wrap it with waterproof raw rubber. Install the first sealing ring 130 and the second sealing ring 140 between the plug 110 and the plug 100 and between the concrete segment. Before sealing, carefully check the sealing performance of each sealing ring to prevent leakage during the grouting process.

[0047] 3. Grouting equipment installation: This solution uses a portable high-pressure grouting machine. Before grouting, connect the grouting machine to the grouting hole 1111 of this sealing tool.

[0048] 4. Grouting fluid preparation and grouting:

[0049] ① Prepare the appropriate amount of grout according to the instructions for use of epoxy resin grouting material.

[0050] ② After all preliminary procedures are completed, grouting is carried out by professionals. The grouting pressure is controlled at 0.5-0.7MPa during the grouting process. Relevant personnel should stay away from the grouting port and take safety precautions.

[0051] 5. Equipment disassembly and grouting area maintenance:

[0052] ① After grouting is completed, the grouting equipment is disassembled and cleaned in preparation for the next grouting.

[0053] ② Clean the grouting cavity with grout and observe and check the grouting effect irregularly within 24 hours.

[0054] The technical means disclosed in this invention are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

[0055] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0056] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0058] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A leak-sealing tool for leakage at the segment hoisting hole, characterized in that, include: The plug is inserted into the grouting pipe pre-embedded in the segment hoisting hole and is sealed to the grouting pipe; The plug assembly is pressed against the outer surface of the plug and the segment hoisting hole. At this time, the plug assembly and the inner arc surface of the segment hoisting hole form a grouting cavity. The gap between the grouting pipe and the concrete segment forms a seepage channel. The grouting cavity is connected to the seepage channel. Grout is injected into the seepage channel from the grouting cavity under pressure to seal the seepage point. The plug assembly includes a plug, and the plug, the pressing joint between the plug and the segment hoisting hole is provided with a first sealing ring and a second sealing ring, respectively. The plug and the segment hoisting hole are connected by the first sealing ring and the second sealing ring to form the grouting cavity; The plug is threadedly connected to the grouting pipe and a third sealing ring is provided between the two. The third sealing ring is located at the top of the plug, and at the same time, the third sealing ring abuts against the first sealing ring. The first sealing ring, the second sealing ring, and the third sealing ring make the grouting cavity communicate only with the seepage channel. The end cap is provided with a grouting hole, which is connected to the grouting cavity and is used to connect the grouting head of an external grouting device.

2. The leak-sealing tool for leakage at the segment hoisting hole according to claim 1, characterized in that, The plug assembly also includes a screw that passes through the plug and abuts against the end cap, while the plug is pressed against the end cap and the surface of the concrete segment by screwing a nut onto the screw.

3. A method for sealing leakage at the segment hoisting hole, employing the sealing fixture as described in any one of claims 1-2, characterized in that, include: S1. Screw the plug onto the internal thread of the grouting pipe; S2. Press the end cap tightly onto the surface of the plug and the concrete segment, so that the end cap and the inner arc surface of the concrete segment enclose a grouting cavity. S3. The grout is injected under pressure from the grouting cavity into the seepage channel between the grouting pipe and the concrete segment to seal the seepage point.

4. A method for sealing leakage at the segment hoisting hole according to claim 3, characterized in that, In step S1, the third sealing ring is installed between the plug and the grouting pipe.

5. A method for sealing leakage at the segment hoisting hole according to claim 4, characterized in that, In step S2, the first sealing ring and the second sealing ring are respectively installed between the end cap, the plug, and the surface of the concrete segment, wherein the first sealing ring abuts against the third sealing ring, so that the grouting cavity is only connected to the seepage channel.

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