Grouting device for high-pressure water head

Abstract

The utility model relates to the technical field of grouting reinforcement, in particular to a grouting device for a high-pressure water head, which comprises an external grouting pipe, an internal grouting pipe and a fixing ring, the external grouting pipe is arranged in a grouting hole channel, and a containing cavity is arranged in the external grouting pipe; the built-in grouting pipe extends into the accommodating cavity and is in threaded connection with the external grouting pipe, and part of the built-in grouting pipe is exposed out of the accommodating cavity and is communicated with the grouting machine; the fixing ring is arranged on the periphery of the external grouting pipe in a sleeving mode, and the fixing ring is used for being in interference fit with the grouting hole channel so that the external grouting pipe can be fixed into the grouting hole channel. According to the utility model, the interference amount of the external grouting pipe and the grouting hole channel can be adjusted, so that grout can flow to a deeper layer of a construction area; and the external grouting pipe is fixed in the grouting hole channel through the fixing ring, so that the external grouting pipe is prevented from being taken out of the grouting hole channel under the action of high water head pressure, and the problem that the grouting operation is affected due to the fact that the grouting device is difficult to be placed in the grouting hole channel during high-pressure grouting is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of grouting reinforcement, in particular to a grouting device for high-pressure water heads. Background Art

[0002] The grouting technology under high water head pressure is a technology specifically used to solve engineering construction problems in environments with high groundwater levels and complex geological conditions. This technology forms a solid underground closed wall around the underground construction area by continuously drilling and grouting through bored cast-in-place piles to resist the pressure of groundwater. Generally, cement slurry is used as the grouting material. After injection and curing, it can effectively block groundwater and prevent water flow from entering the construction area. The pressure and flow rate of the grouting material need to be adjusted according to the actual situation to ensure the construction quality.

[0003] The principle of this technology is mainly to use a high-pressure grouting machine to inject grouting material into concrete cracks under high pressure. After the slurry reacts with water, it quickly expands, foams, and solidifies to block leakage points and cracks, achieving the purpose of completely stopping water.

[0004] Due to the action of high water head pressure, it is difficult to place the grouting device into the grouting hole. During the grouting reinforcement process, under the action of high water head pressure and pressure grouting, slurry often overflows from the orifice of the grouting hole. On the one hand, it reduces the bearing capacity of the anchor rod (soil nail) and affects the use effect of the support structure, bringing adverse effects to the project. On the other hand, the overflow of slurry will damage the soil structure, cause soil erosion, reduce the construction efficiency, and at the same time, due to the relatively fixed leakage prevention device, it is impossible to conveniently adjust the depth of the grouting pipe.

[0005] Therefore, it is necessary to provide a convenient and fast grouting device for high-pressure water heads to solve the above technical problems. Summary of the Utility Model

[0006] The main purpose of the utility model is to provide a grouting device for high-pressure water heads, aiming to solve the problem that it is difficult to place the grouting device into the grouting duct during high-pressure grouting, which affects the grouting operation.

[0007] To achieve the above purpose, the utility model provides a grouting device for high-pressure water heads, which is arranged in a grouting duct. The grouting device for high-pressure water heads includes an external grouting pipe, an internal grouting pipe, and a fixing ring. One end of the external grouting pipe is arranged in the grouting duct, and a cavity is provided in the external grouting pipe; the internal grouting pipe extends into the cavity and is threadedly connected with the external grouting pipe, and a part of the internal grouting pipe is exposed outside the cavity and communicated with a grouting machine; the fixing ring is sleeved on the outer periphery of the external grouting pipe, and the fixing ring is in interference fit with the grouting duct to fix the external grouting pipe in the grouting duct.

[0008] Optionally, the fixing ring is arranged at one end of the external grouting pipe extending into the grouting hole, and the fixing ring is a water-swellable rubber ring.

[0009] Optionally, the external grouting pipe includes a pipe body, a fastener and a sealing ring. A cavity is formed in the pipe body, and a part of the pipe body is exposed outside the grouting hole; the fastener is sleeved outside the internal grouting pipe and is threadedly connected to the internal grouting pipe; the fastener abuts against one end of the pipe body exposed outside the grouting hole; the sealing ring is arranged between the fastener and the pipe body.

[0010] Optionally, a first groove is formed at one end of the fastener close to the pipe body, and a second groove is formed at one end of the pipe body exposed outside the grouting hole. Two ends of the sealing ring in the extending direction of the pipe body are respectively arranged in the first groove and the second groove in an interference fit manner.

[0011] Optionally, the grouting device for high-pressure water head further includes a tee, a first ball valve and a second ball valve; the first end of the tee is communicated with the internal grouting pipe, and both the first end and the second end of the tee are communicated with a grouting machine; the first ball valve is arranged on the first end of the tee; the second ball valve is arranged on the second end of the tee;

[0012] Or the second ball valve is arranged on the third end of the tee.

[0013] Optionally, a holding part is formed on the outer periphery of the fastener.

[0014] Optionally, external threads are arranged on the internal grouting pipe, internal threads matching the external threads are arranged on the inner wall of the cavity, and the length of the external threads is greater than the length of the internal threads.

[0015] Optionally, the length of the fixing ring in the extending direction of the external grouting pipe is 14 cm - 16 cm.

[0016] In the technical solution of the present utility model, an external grouting pipe is arranged in a grouting hole channel. A fixing ring sleeved on the outer periphery of the external grouting pipe abuts against the inner wall of the grouting hole channel. A grouting machine injects slurry into the external grouting pipe through an internal grouting pipe. After the slurry acts with the water seeping out of the crack, it rapidly expands, foams and solidifies, so as to block the leakage point and the crack, achieving the purpose of completely stopping water. According to the actual situation of the construction area, the operator can adjust the screwing-in amount between the internal grouting pipe and the external grouting pipe to change the length of the whole grouting device, so as to adjust the interference amount between the external grouting pipe and the grouting hole channel, facilitating the slurry to flow to a deeper layer of the construction area. The internal grouting pipe and the external grouting pipe are threadedly connected, which can play a certain sealing role to avoid slurry leakage. And the external grouting pipe is fixed in the grouting hole channel through the fixing ring to prevent the external grouting pipe from being taken out of the grouting hole channel under the action of high water head pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0018] Figure 1 It is a schematic structural diagram of a grouting device for high water head in an embodiment of the present utility model;

[0019] Figure 2 is Figure 1 a partial enlarged view;

[0020] Figure 3 is Figure 2 an exploded view.

[0021] Explanation of the reference numerals in the drawings:

[0022] 1 External grouting pipe, 1.1 Pipe body, 1.1.1 Cavity, 1.1.2 Second groove, 1.1.2 Internal thread, 1.2 Fastener, 1.2.1 Holding part, 1.2.2 First groove, 1.3 Sealing ring, 2 Internal grouting pipe, 2.1 External thread, 3 Fixing ring, 4 Three-way piece, 5 First ball valve, 6 Second ball valve, 7 Grouting hole channel.

[0023] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will describe the embodiments of the present utility model in detail with reference to the drawings. However, the present utility model can be implemented in many different ways defined and covered by the claims.

[0025] The utility model provides a grouting device for high-pressure water heads, abbreviated as the grouting device, aiming to solve the problem that it is difficult to place the grouting device into the grouting duct during high-pressure grouting, which affects the grouting operation.

[0026] As Figure 1 shown, the grouting device for high-pressure water heads in this embodiment is arranged in the grouting duct 7. The grouting device for high-pressure water heads includes an external grouting pipe 1, an internal grouting pipe 2 and a fixing ring 3. One end of the external grouting pipe 1 is arranged in the grouting duct 7, and a cavity 1.1.1 is provided in the external grouting pipe 1; the internal grouting pipe 2 extends into the cavity 1.1.1 and is threadedly connected with the external grouting pipe 1, and a part of the internal grouting pipe 2 is exposed outside the cavity 1.1.1 and communicated with the grouting machine; the fixing ring 3 is sleeved on the outer periphery of the external grouting pipe 1, and the fixing ring 3 is used for interference fit with the grouting duct 7 to fix the external grouting pipe 1 in the grouting duct 7. During actual operation, the external grouting pipe 1 is arranged in the grouting duct 7, the fixing ring 3 sleeved on the outer periphery of the external grouting pipe 1 abuts against the inner wall of the grouting duct 7, the grouting machine injects slurry into the external grouting pipe 1 through the internal grouting pipe 2, and the slurry expands, foams and solidifies after reacting with the water seeping out of the crack, so as to block the leakage point and crack and achieve the purpose of completely stopping water; according to the actual situation of the construction area, the operator can adjust the screwing-in amount between the internal grouting pipe 2 and the external grouting pipe 1 to change the length of the whole grouting device, so as to adjust the interference amount between the external grouting pipe 1 and the grouting duct 7, so that the slurry can flow to the deeper layer of the construction area; the internal grouting pipe 2 is threadedly connected with the external grouting pipe 1, which can play a certain sealing role to avoid slurry leakage; and the external grouting pipe 1 is fixed in the grouting duct 7 through the fixing ring 3 to prevent the external grouting pipe 1 from being taken out of the grouting duct 7 under the action of high water head pressure.

[0027] Based on the above embodiment, the fixing ring 3 is arranged at one end of the external grouting pipe 1 extending into the grouting duct 7, and the fixing ring 3 is a water-swelling rubber ring. The fixing ring 3 is in interference fit with the grouting duct 7, so that one end of the external grouting pipe 1 extending into the grouting duct 7 can be fixedly arranged in the grouting duct 7, and the fixing ring 3 is a water-swelling rubber ring to ensure that after the external grouting pipe 1 extends into the grouting duct 7, the fixing ring 3 contacts the water in the grouting duct 7 and expands to realize the interference fit between the fixing ring 3 and the grouting duct 7, and avoid that the grouting device cannot be placed into the grouting duct 7 under the action of high water head.

[0028] Specifically, the external grouting pipe 1 includes a pipe body 1.1, a fastener 1.2, and a sealing ring 1.3. A cavity 1.1.1 is formed inside the pipe body 1.1, and a part of the pipe body 1.1 is exposed outside the grouting duct 7; the fastener 1.2 is sleeved outside the internal grouting pipe 2 and is threadedly connected to the internal grouting pipe 2; the fastener 1.2 abuts against one end of the pipe body 1.1 exposed outside the grouting duct 7; the sealing ring 1.3 is arranged between the fastener 1.2 and the pipe body 1.1. By rotating the fastener 1.2, the operator can drive the external grouting pipe 1 to move along the extension direction of the internal grouting pipe 2 to adjust the length of the external grouting pipe 1 extending into the grouting duct 7. And a sealing ring 1.3 is arranged between the fastener 1.2 and the pipe body 1.1, which further improves the sealing performance of the external grouting pipe 1 and avoids problems such as insufficient bearing capacity caused by grout leakage, damage to the soil structure, and soil erosion.

[0029] Further, referring to Figure 2 , a first groove 1.2.2 is formed at one end of the fastener 1.2 close to the pipe body 1.1, and a second groove 1.1.2 is formed at one end of the pipe body 1.1 exposed outside the grouting duct 7. The two ends of the sealing ring 1.3 along the extension direction of the pipe body 1.1 are press-fitted into the first groove 1.2.2 and the second groove 1.1.2 respectively. The sealing ring 1.3 is made of an elastic material. The sealing ring 1.3 can be a rubber ring, and the rubber ring abuts tightly against the inner walls of the first groove 1.2.2 and the second groove 1.1.2, so as to avoid the slurry in the pipe body 1.1 from flowing out through the sealing ring 1.3 and improve the sealing performance.

[0030] Furthermore, the grouting device for high-pressure water head further includes a tee 4, a first ball valve 5, and a second ball valve 6; the first end of the tee 4 is communicated with the internal grouting pipe 2, and both the first end and the second end of the tee 4 are communicated with the grouting machine; the first ball valve 5 is arranged on the first end of the tee 4; the second ball valve 6 is arranged on the second end of the tee 4; in another example of this embodiment, the second ball valve 6 is arranged on the third end of the tee 4. During high-pressure grouting, the grouting device is arranged in the grouting duct 7 of the construction area to be constructed. By opening the first ball valve 5 and the second ball valve 6, a discharge channel for high pressure in the grouting body to be constructed is provided, and the water-swellable rubber ring on the external grouting pipe 1 is tightly abutted against the grouting duct 7, and at the same time the second ball valve 6 is closed. According to the actual situation of the construction area, the operator can choose single-fluid grouting or double-fluid grouting. During single-fluid grouting, the grouting machine is started to inject slurry into the first end of the tee 4, and then the first ball valve 5 is opened to inject the slurry into the external grouting pipe 1. The slurry flows into the cracks in the construction area and quickly expands, foams, and solidifies after reacting with the water in the cracks, so as to block the leakage points and cracks; during double-fluid grouting, the first ball valve 5 and the second ball valve 6 are opened at the same time, and the grouting machine is started to inject slurry into the two ends of the tee 4 not communicated with the internal grouting pipe 2 respectively. The two slurries are mixed in the tee 4 and then enter the external grouting pipe 1 through the internal grouting pipe 2.

[0031] In one embodiment, a holding portion 1.2.1 is formed on the outer periphery of the fastener 1.2. An operator can rotate the fastener 1.2 through the holding portion 1.2.1, thereby driving the external grouting pipe 1 to move in a direction away from the tee 4, so as to adjust the length of the external grouting pipe 1 extending into the grouting hole 7.

[0032] In one embodiment, an external thread 2.1 is provided on the internal grouting pipe 2, and an internal thread 1.1.2 matching the external thread 2.1 is provided on the inner wall of the cavity 1.1.1. The length of the external thread 2.1 is greater than the length of the internal thread 1.1.2. The length of the external thread 2.1 is 1.2 to 5.0 times the length of the internal thread 1.1.2, so as to ensure the threaded connection relationship between the internal grouting pipe 2 and the external grouting pipe 1 while adjusting the screwing amount of the internal grouting pipe 2 and the external grouting pipe 1.

[0033] In one embodiment, the length of the fixing ring 3 along the extending direction of the external grouting pipe 1 is 14 cm - 16 cm. The contact area between the fixing ring 3 and the inner wall of the grouting hole 7 is ensured, and the friction force between the fixing ring 3 and the inner wall of the grouting hole 7 is increased, thereby enhancing the stability between the external grouting pipe 1 and the grouting hole 7.

[0034] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A grouting device for high-pressure water head, arranged in a grouting channel (7), characterized in that: The grouting device for high-pressure water head comprises an external grouting pipe (1), an internal grouting pipe (2) and a fixing ring (3); one end of the external grouting pipe (1) is arranged in the grouting channel (7), and a cavity (1.1.1) is provided in the external grouting pipe (1); the internal grouting pipe (2) extends into the cavity (1.1.1) and is threadedly connected to the external grouting pipe (1), and a portion of the internal grouting pipe (2) is exposed from the cavity (1.1.1) and is connected to a grouting machine; the fixing ring (3) is sleeved on the outer periphery of the external grouting pipe (1), and the fixing ring (3) and the grouting channel (7) are interference fit to fix the external grouting pipe (1) in the grouting channel (7).

2. The grouting device for high pressure water head according to claim 1, characterized in that: The fixing ring (3) is arranged at one end of the external grouting pipe (1) extending into the grouting channel (7), and the fixing ring (3) is a rubber ring that expands when exposed to water.

3. The grouting device for high pressure water head according to claim 2, characterized in that: The external grouting pipe (1) comprises a pipe body (1.1), a fastener (1.2) and a sealing ring (1.3); a cavity (1.1.1) is formed in the pipe body (1.1), and a portion of the pipe body (1.1) is exposed from the grouting channel (7); the fastener (1.2) is sleeved outside the internal grouting pipe (2) and is threadedly connected to the internal grouting pipe (2); the fastener (1.2) abuts against one end of the pipe body (1.1) exposed from the grouting channel (7); and the sealing ring (1.3) is arranged between the fastener (1.2) and the pipe body (1.1).

4. The grouting device for high pressure water head according to claim 3, characterized in that: A first groove (1.2.2) is provided at one end of the fastener (1.2) close to the tube body (1.1), a second groove (1.1.2) is provided at the end of the tube body (1.1) exposed from the grouting channel (7), and two ends of the sealing ring (1.3) along the extension direction of the tube body (1.1) are interference-fitted in the first groove (1.2.2) and the second groove (1.1.2), respectively.

5. The grouting device for high pressure water head according to any one of claims 2 to 4, characterized in that: The grouting device for high-pressure water head further comprises a three-way piece (4), a first ball valve (5) and a second ball valve (6); the first end of the three-way piece (4) is connected to the built-in grouting pipe (2), and the first end and the second end of the three-way piece (4) are both connected to the grouting machine; the first ball valve (5) is arranged on the first end of the three-way piece (4); the second ball valve (6) is arranged on the second end of the three-way piece (4); Or the second ball valve (6) is arranged at the third end of the three-way piece (4).

6. The grouting device for high-pressure water head according to any one of claims 3 or 4, characterized in that: A gripping portion (1.2.1) is formed on the outer periphery of the fastener (1.2).

7. The grouting device for high pressure water head according to any one of claims 1 to 4, characterized in that: The built-in grouting pipe (2) is provided with an external thread (2.1), the inner wall of the cavity (1.1.1) is provided with an internal thread (1.1.2) matching the external thread (2.1), and the length of the external thread (2.1) is greater than the length of the internal thread (1.1.2).

8. The grouting device for high-pressure water head according to any one of claims 1 to 4, characterized in that: The length of the fixing ring (3) along the extension direction of the external grouting pipe (1) is 14 cm-16 cm.

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