Grouting pipe and construction method thereof

Abstract

The invention provides a grouting pipe and a construction method thereof. The grouting pipe comprises a body and a horn-shaped grouting pipeline arranged in the body in the axial direction of the body. The grouting pipe is designed to be the trumpet-shaped grouting pipe, compared with a straight pipe, grout can be diffused more evenly, the grouting effect is effectively improved, and then the overall quality and stability of a tunnel are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, in particular to a grouting pipe and a construction method thereof. Background Art

[0002] In tunnel construction, segment grouting is a critical step in ensuring tunnel structural stability and waterproofing. Traditional grouting pipes used for segment grouting have numerous shortcomings, particularly the irrational design of these pipes, which leads to uneven grouting distribution, impacting the grouting effect and, in turn, the overall quality and stability of the tunnel.

[0003] In view of the shortcomings of the traditional grouting pipes in the prior art, those skilled in the art have been looking for solutions. Summary of the Invention

[0004] The object of the present invention is to provide a grouting pipe and a construction method thereof, which can uniformly grout, improve the grouting effect, and thus improve the overall quality and stability of the tunnel.

[0005] In order to solve the above technical problems, the present invention provides a grouting pipe, which includes: a body and a trumpet-shaped grouting pipe arranged in the body along its axial direction.

[0006] Optionally, the grouting pipe further includes: an end cover adapted to the second end of the body to temporarily block the second end of the body.

[0007] Optionally, in the grouting pipe, the end cover includes: an end cover top, a rod body, a half-circle thread and a spiral protrusion, one end of the rod body is vertically fixed to one side of the end cover, the half-circle thread is arranged on the outside of the end of the rod body adjacent to the end cover top, and the spiral protrusion is arranged along the axial direction of the rod body on the outside of the end of the rod body away from the end cover top; the end cover is assembled and connected to the second end of the main body based on the half-circle thread.

[0008] Optionally, the grouting pipe further includes: a plurality of annular bosses fixedly arranged on the outside of the main body at intervals along the axial direction of the main body.

[0009] Optionally, in the grouting pipe, the inner diameter of each annular boss matches the outer diameter of the body at its location.

[0010] Optionally, the grouting pipe further includes a threaded sleeve embedded in the inner side of the first end of the body, serving as a basic structure for assembly with the grouting equipment.

[0011] The present invention also provides a construction method of a grouting pipe, the construction method of the grouting pipe comprising:

[0012] Before grouting the tunnel segments, the first end of the grouting pipe is tightly connected to the grouting equipment, and the second end of the grouting pipe is extended into the gap between the segment and the surrounding rock;

[0013] Start the grouting equipment and begin grouting. The slurry is evenly injected into the gap between the pipe segment and the surrounding rock along the trumpet-shaped grouting pipe of the grouting pipe.

[0014] Optionally, in the construction method of the grouting pipe, after the grouting equipment is started to begin grouting, before the slurry is evenly injected into the gap between the pipe segment and the surrounding rock along the trumpet-shaped grouting pipe of the grouting pipe, it also includes: the slurry flows along the spiral protrusion of the end cover under pressure, pushing the end cover to untwist relative to the second end of the body, so that the end cover is separated from the second end of the body.

[0015] The grouting pipe and construction method provided herein comprise a main body and a trumpet-shaped grouting conduit disposed axially within the main body. This trumpet-shaped grouting conduit allows for more even grouting than with a straight conduit, effectively improving the grouting effect and, consequently, the overall quality and stability of the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0017] Figure 1 is a schematic cross-sectional view of a grouting pipe according to one embodiment of the present invention;

[0018] Figure 2 This is a front view of a grouting pipe according to an embodiment of the present invention;

[0019] Figure 3 is a front view of an end cap in one embodiment of the present invention;

[0020] Figure 4 1 is a side view of an end cover according to an embodiment of the present invention.

[0021] In the picture:

[0022] 1-annular boss; 2-threaded sleeve; 3-end cap; 4-spiral protrusion. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the grouting pipe and construction method proposed by the present invention, in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not to exact scale, and are only used to facilitate and clearly illustrate the purpose of the embodiments of the present invention.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0025] In the description of the invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of an invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0028] Please refer to Figure 1 and Figure 2 The grouting pipe includes: a body and a trumpet-shaped grouting pipe arranged in the body along its axial direction.

[0029] In this embodiment, the grouting pipe is designed to have a trumpet-shaped grouting pipe so that the slurry can be dispersed more evenly during injection, avoiding the situation where the local grouting pressure is too high or too low, thereby ensuring the uniformity of grouting, improving the grouting effect, and helping to enhance the stability of the tunnel structure. The principle of the grouting pipe of the present invention to achieve uniform grouting is that the hydrodynamic advantages of the trumpet-shaped grouting pipe during the grouting process can not only reduce the flow rate difference, but also reduce the impact of turbulence. The details are as follows:

[0030] Reduce flow velocity differences: When the slurry flows out of the grouting pipe, the bell-mouth shape can create a space for the slurry to gradually diffuse at the outlet. Compared with a straight pipe mouth, it avoids the slurry from being directly sprayed out at high speed. In the bell-mouth, the flow velocity of the slurry will gradually adjust, so that the difference in slurry flow velocity near the pipe wall and the center is reduced. In this way, the slurry tends to diffuse more evenly when leaving the grouting pipe, rather than forming local high-speed flow or low-speed flow areas. Reduce the impact of turbulence: The trumpet shape helps to stabilize the flow state of the slurry and reduce the generation of turbulence. Turbulence will make the flow of slurry disordered, resulting in uneven grouting. The structure of the bell-mouth can make the slurry form a more laminar flow state when it flows out, allowing the slurry to diffuse more smoothly into the surrounding medium, thereby improving the uniformity of grouting.

[0031] In this embodiment, please refer to Figure 3 and Figure 4 , the grouting pipe also includes: an end cap 3 adapted to the second end of the body to temporarily block the second end of the body (corresponding to the end with the largest diameter of the trumpet-shaped grouting pipe). The end cap 3 can play a good sealing role during the prefabrication of the pipe segments and the subsequent stage when the grouting operation is not performed, and can effectively prevent debris from entering the interior of the grouting pipe to ensure the smooth flow of the grouting channel. Specifically, the end cap 3 includes: an end cap 3 top, a rod body, a half-circle thread and a spiral protrusion 4, one end of the rod body is vertically fixed to one side of the end cap 3, the half-circle thread is arranged on the outside of the end of the rod body adjacent to the top of the end cap 3, and the spiral protrusion 4 is arranged along the axial direction of the rod body on the outside of the end of the rod body away from the top of the end cap 3; the end cap 3 is assembled and connected with the second end of the body based on the half-circle thread.

[0032] Here, the half-circle thread of the end cap 3 engages with the half-circle thread on the inner side of the second end of the grouting pipe for 2-3 teeth. When the slurry flows along the spiral protrusion 4 under pressure, it can push the end cap 3 and the thread on the inner side of the second end of the grouting pipe to untwist, and then unscrew the end cap 3, so that the end cap 3 is separated from the grouting pipe body. The first end of the grouting pipe body (corresponding to the end with the smallest diameter of the trumpet-shaped grouting pipe) and the second end (corresponding to the end with the largest diameter of the trumpet-shaped grouting pipe) are connected based on the trumpet-shaped grouting pipe.

[0033] For further information, please refer to Figure 2 , the grouting pipe also includes: a plurality of annular bosses 1, which are fixed on the outside of the main body at intervals along the axial direction of the main body. The setting of the annular bosses 1 can effectively prevent groundwater from penetrating into the tunnel through the gap between the grouting pipe and the pipe segment, thereby improving the waterproof performance of the tunnel. In addition, the overall strength of the main body of the grouting pipe is enhanced (equivalent to reinforcing ribs), so that it is not easy to deform when subjected to external pressure and grouting pressure, and the friction resistance can be increased to prevent the grouting pipe from falling off due to excessive grouting pressure, thereby extending the service life of the grouting pipe. In addition, the grouting pipe of the present invention is prepared using a cast iron process, which further improves the service life of the grouting pipe.

[0034] The inner diameter of each annular boss 1 matches the outer diameter of the body at the location where it is installed. That is, the inner diameter of each annular boss 1 is different and needs to be adapted to the outer diameter of the location where it is installed. Preferably, the grouting pipe also includes a threaded sleeve 2 embedded inside the first end of the body, which serves as the basic structure for assembly with the grouting equipment, so that the grouting pipe can be connected to the grouting equipment more tightly and reliably during the subsequent construction phase, ensuring that the slurry will not leak from the connection during the grouting process.

[0035] Correspondingly, this embodiment also provides a construction method for a grouting pipe. Figure 1-Figure 4 The construction method of the grouting pipe described in this embodiment is described in detail. First, step S1 is performed. Before grouting the tunnel segment, the first end of the grouting pipe is tightly assembled and connected to the grouting equipment, and the second end of the grouting pipe is extended into the gap between the segment and the surrounding rock;

[0036] Next, step S2 is executed to start the grouting equipment and start grouting. The slurry is evenly injected into the gap between the pipe segment and the surrounding rock along the trumpet-shaped grouting pipe of the grouting pipe. After the grouting equipment is started and grouting begins, the flow process of the slurry and the dynamic transformation process between the components of the grouting pipe are as follows:

[0037] The grouting pipe is installed to the middle of the width direction of the pipe segment through the grouting hole of the pipe segment. The slurry enters the trumpet-shaped grouting pipe through the first end of the main body via the grouting equipment. The slurry flows along the trumpet-shaped grouting pipe. Under the action of pressure, the slurry will flow along the spiral protrusion 4 of the end cover 3, pushing the end cover 3 to untwist relative to the second end of the main body, so that the end cover 3 is separated from the second end of the main body. The slurry enters the gap between the injection pipe segment and the surrounding rock through the second section of the main body to complete the grouting.

[0038] It should be noted that for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0039] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0040] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A grouting pipe, characterized in that: include: The main body and the trumpet-shaped grouting pipe are arranged in the main body along the axial direction.

2. The grouting pipe according to claim 1, characterized in that: Also includes: An end cap adapted to the second end of the body is used to temporarily block the second end of the body.

3. The grouting pipe according to claim 2, characterized in that: The end cover includes: an end cover top, a rod body, a half-circle thread and a spiral protrusion, one end of the rod body is vertically fixed to one side of the end cover, the half-circle thread is arranged on the outside of the end of the rod body adjacent to the end cover top, and the spiral protrusion is arranged along the axial direction of the rod body on the outside of the end of the rod body away from the end cover top; the end cover is assembled and connected to the second end of the body based on the half-circle thread.

4. The grouting pipe according to claim 1, characterized in that: Also includes: A plurality of annular bosses are fixedly arranged on the outer side of the main body at intervals along the axial direction of the main body.

5. The grouting pipe according to claim 4, characterized in that: The inner diameter of each annular boss is matched with the outer diameter of the body at the location where the boss is arranged.

6. The grouting pipe according to claim 1, characterized in that: It also includes a threaded sleeve embedded in the inner side of the first end of the body and serving as a basic structure for assembly with the grouting equipment.

7. A construction method for a grouting pipe, characterized in that: include: Before grouting the tunnel segments, the first end of the grouting pipe is tightly connected to the grouting equipment, and the second end of the grouting pipe is extended into the gap between the segment and the surrounding rock; Start the grouting equipment and begin grouting. The slurry is evenly injected into the gap between the pipe segment and the surrounding rock along the trumpet-shaped grouting pipe of the grouting pipe.

8. The construction method of the grouting pipe according to claim 7, characterized in that: After the grouting equipment is started to begin grouting, the slurry is evenly injected into the gap between the pipe segment and the surrounding rock along the trumpet-shaped grouting pipe of the grouting pipe, and the method also includes: the slurry flows along the spiral protrusion of the end cover under the action of pressure, pushing the end cover to untwist relative to the second end of the body, so that the end cover is separated from the second end of the body.

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