Grouting structure and grouting system

Abstract

The utility model relates to a grouting structure and a grouting system.The grouting structure comprises a grouting pipe and a grout outlet assembly, the grout outlet assembly comprises a grout outlet part and a grouting core pipe used for conveying grout, and the grout outlet part is arranged in the grouting pipe; the grout outlet part is provided with an abutting face which abuts against the inner wall of the grouting pipe in a sealed mode to define a grouting cavity, the grouting core pipe stretches into the grouting pipe and communicates with the grouting cavity through the grout outlet part, and the grouting pipe comprises a grouting section stretching into a grouting drill hole. Grout outlet holes communicated with the grouting cavity are formed in the pipe wall of the grouting section, the grout outlet holes are formed in the grouting direction, and the grouting structure and the grouting system solve the problem that it is difficult to directionally control the distribution position of grout through a traditional grouting method.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a grouting structure and a grouting system. Background Art

[0002] During the construction and maintenance of subway tunnels, due to the differences in the surrounding rocks of the strata, uneven settlement of the tunnels may occur, affecting the safety of subway operation. Grouting in the tunnels affects the structure of the shield segments. Therefore, surface grouting operations are required for treatment. Surface grouting is a process of injecting materials such as cement and mortar into the stratum structure below the tunnel to enhance the strength and stability of the stratum and play a role in lifting and controlling settlement.

[0003] In traditional grouting methods, the slurry flows randomly, and it is difficult to directionally control its distribution position, which not only affects the grouting effect but also may lead to waste of resources and increase in costs. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a grouting structure and a grouting system, aiming to solve the problem that it is difficult to directionally control the distribution position of the slurry in the existing grouting methods.

[0005] To achieve the above object, a grouting structure proposed by the utility model includes a grouting pipe and a slurry outlet assembly. The slurry outlet assembly includes a slurry outlet part and a grouting core pipe for transmitting the slurry. The slurry outlet part is arranged in the grouting pipe. The slurry outlet part has a contact surface that is hermetically abutted against the inner wall of the grouting pipe to define a grouting cavity. The grouting core pipe extends into the grouting pipe and communicates with the grouting cavity through the slurry outlet part. The grouting pipe includes a grouting section extending into a grouting hole. The pipe wall of the grouting section is provided with slurry outlet holes communicating with the grouting cavity, and the slurry outlet holes are arranged facing the grouting direction.

[0006] According to some embodiments of the utility model, the side wall of the grouting pipe has a directional grouting line extending along the length direction of the grouting pipe. There are a plurality of slurry outlet holes, and the plurality of slurry outlet holes are distributed along the length direction of the grouting pipe and are all located on the directional grouting line.

[0007] According to some embodiments of the utility model, the slurry outlet assembly is arranged to move axially in the grouting pipe, and all the plurality of slurry outlet holes are within the moving stroke of the slurry outlet assembly and communicate with the grouting cavity.

[0008] According to some embodiments of the utility model, the slurry outlet part is arranged to telescopically move in the radial direction of the grouting pipe.

[0009] According to some embodiments of the present utility model, at least a part of the slurry discharging part is made of an elastic material and is provided with an inflation cavity inside. The slurry discharging assembly further includes a pressurizing pipeline for connecting with a pressurizing pump, and the pressurizing pipeline is communicated with the inflation cavity.

[0010] According to some embodiments of the present utility model, the grouting pipe further includes a marking section connected to the grouting section. The marking section is located above the grouting borehole, and an indicating part is provided on the outer wall of the marking section, and the indicating part is located on the directional grouting line.

[0011] According to some embodiments of the present utility model, it further includes a sealing part for plugging the slurry discharging hole, and the sealing part is detachably connected to the grouting pipe.

[0012] According to some embodiments of the present utility model, a thin-walled shell is sleeved on the outer wall of the grouting pipe, and the grouting section is located inside the thin-walled shell.

[0013] According to some embodiments of the present utility model, the grouting pipe is arranged in sections, and adjacent two sections of the grouting pipes are bonded by a waterproof tape.

[0014] In addition, the present utility model further provides a grouting system, which includes a slurry storage device for storing and outputting slurry and the grouting structure as described in any one of the above, and the slurry storage device is connected to the grouting core pipe.

[0015] The present utility model has at least the following beneficial effects:

[0016] In the present utility model, the slurry discharging assembly includes a slurry discharging part and a grouting core pipe for transporting slurry. The slurry discharging part is arranged inside the grouting pipe. The slurry discharging part has a contact surface that is in sealed contact with the inner wall of the grouting pipe to define a grouting cavity. The grouting core pipe extends into the grouting pipe and communicates with the grouting cavity through the slurry discharging part. The grouting pipe includes a grouting section extending into a grouting borehole. A slurry outlet hole communicating with the grouting cavity is formed in the wall of the grouting section, and the slurry outlet hole is arranged towards the grouting direction. The operator first uses a drilling rig to drill a grouting borehole at the ground position corresponding to the area to be grouted. The grouting borehole extends from the ground to the area to be grouted. Then, the grouting section of the grouting pipe is extended into the grouting borehole, and the grouting pipe is rotated to make the slurry outlet holes formed in the grouting section face the area to be grouted. Then, the slurry discharging assembly is extended into the grouting pipe, so that the slurry discharging part is located above the slurry outlet hole, making the grouting cavity defined by the contact surface of the slurry discharging part communicate with the slurry outlet hole. The slurry is output into the grouting cavity by the grouting core pipe. Since the contact surface is in sealed contact with the inner wall of the grouting pipe, it restricts the backflow of the slurry upwards, so that the slurry can only be output from the slurry outlet hole to the area to be grouted, realizing directional grouting of the area to be grouted. Compared with the traditional grouting method of directly drilling a hole above the area to be grouted and pouring the slurry into the area to be grouted along the hole, the grouting pipe and the slurry outlet holes on the wall of the grouting pipe provided in this application achieve directional grouting, which not only improves the grouting effect, but also reduces the waste of resources and lowers the cost. The grouting structure provided by the present utility model solves the problem that it is difficult to directionally control the distribution position of the slurry in the traditional grouting method. 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, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 FIG. 1 is a schematic structural diagram of a grouting structure provided by an embodiment of the present utility model;

[0019] Figure 2 FIG. Figure 1 is a schematic structural diagram of the grouting pipe in FIG.

[0020] Figure 3 FIG. 3 is a schematic structural diagram of a grouting system provided by an embodiment of the present utility model.

[0021] Description of the reference numerals:

[0022] 100 - Grouting structure; 1 - Grouting pipe; 11 - Grouting section; 111 - Grout outlet hole; 12 - Marking section; 121 - Indicator section; 2 - Grout outlet assembly; 21 - Grout outlet part; 22 - Grouting core pipe; 23 - Pressure pipeline; 3 - Sealing part; 4 - Thin - walled shell; 5 - Waterproof tape; 1000 - Grouting system; 200 - Grout storage equipment; 300 - Pressure pump; 400 - Driving equipment. Detailed implementation manners

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0026] The present utility model provides a grouting structure and a grouting system. Figures 1 to 3 This is a specific embodiment of the grouting structure and the grouting system provided by the present utility model.

[0027] As Figure 1As shown, an embodiment of the utility model provides a grouting structure 100, including a grouting pipe 1 and a slurry outlet assembly 2, the slurry outlet assembly 2 includes a slurry outlet portion 21 and a grouting core pipe 22 for transmitting slurry, the slurry outlet portion 21 is arranged in the grouting pipe 1, the slurry outlet portion 21 has an abutment surface that is sealed and abutted with the inner wall of the grouting pipe 1 to define a grouting cavity, the grouting core pipe 22 extends into the grouting pipe 1 and is connected with the grouting cavity through the slurry outlet portion 21, the grouting pipe 1 includes a grouting section 11 extending into a grouting borehole, a slurry outlet hole 111 connected with the grouting cavity is opened on the pipe wall of the grouting section 11, and the slurry outlet hole 111 is arranged toward the grouting direction.

[0028] In the utility model, the slurry discharge assembly 2 includes a slurry discharge portion 21 and a grouting core tube 22 for transmitting slurry, the slurry discharge portion 21 is arranged in the grouting pipe 1, the slurry discharge portion 21 has an abutment surface that is sealed and abutted with the inner wall of the grouting pipe 1 to define a grouting cavity, the grouting core tube 22 extends into the grouting pipe 1 and is connected with the grouting cavity through the slurry discharge portion 21, the grouting pipe 1 includes a grouting section 11 extending into the grouting borehole, a slurry discharge hole 111 connected with the grouting cavity is opened on the pipe wall of the grouting section 11, and the slurry discharge hole 111 is arranged in the grouting direction. The operator first uses a drilling rig to drill a grouting borehole at the ground position corresponding to the area to be grouting, and the grouting borehole extends from the ground to the area to be grouting. Then, the grouting section 11 of the grouting pipe 1 is extended into the grouting borehole, and the grouting pipe 1 is rotated so that the slurry outlet hole 111 opened by the grouting section 11 is facing the area to be grouting. Then, the slurry outlet assembly 2 is extended into the grouting pipe 1 so that the slurry outlet portion 21 is located above the slurry outlet hole 111, so that the grouting cavity defined by the abutment surface of the slurry outlet portion 21 is connected to the slurry outlet hole 111, and the grouting core pipe 22 outputs slurry into the grouting cavity. Since the abutment surface is sealed and abutted against the inner wall of the grouting pipe 1, the slurry is restricted from flowing back upward, so that the slurry can only be output from the slurry outlet hole 111 to the area to be grouting, thereby realizing directional grouting of the area to be grouting. Compared with the traditional grouting method of directly drilling a hole above the area to be grouted and injecting the slurry into the area to be grouted along the drilled hole, the grouting pipe 1 and the slurry outlet hole 111 of the wall of the grouting pipe 1 provided in the present application realize directional grouting, which not only improves the grouting effect, but also reduces the waste of resources and reduces the cost. The grouting structure 100 provided by the utility model solves the problem that the traditional grouting method is difficult to control the distribution position of the slurry in a directional manner.

[0029] It should be noted that, in order to improve the grouting efficiency and reduce the cost, the grouting borehole extends vertically, and at this time, the grouting pipe 1 also extends vertically.

[0030] It should be noted that when there are multiple areas to be grouted on the same horizontal plane, a plurality of the slurry outlet holes 111 may be provided along the circumferential direction of the grouting section 11 to perform directional grouting on the multiple areas to be grouted simultaneously.

[0031] The number of the slurry outlet holes 111 is not limited, as long as it is ensured that the slurry outlet holes 111 communicate with the grouting cavity. For example, in some embodiments, as Figure 2 shown, the side wall of the grouting pipe 1 has a directional grouting line extending along the length direction of the grouting pipe 1. A plurality of the slurry outlet holes 111 are provided, and the plurality of slurry outlet holes 111 are distributed along the length direction of the grouting pipe 1 and are all located on the directional grouting line. With such a setting, on the one hand, the grouting efficiency is improved, and on the other hand, it is avoided that the slurry only outputs from a single small hole and blocks the slurry outlet holes 111. At the same time, compared with opening a larger-diameter hole, opening a plurality of small holes can prevent the soil underground from pouring back into the grouting cavity. And the fact that the plurality of slurry outlet holes 111 are all located on the directional grouting line enables the operator to rotate the grouting pipe 1 to directionally control the distribution position of the slurry.

[0032] Preferably, in some embodiments, the slurry outlet assembly 2 is movably arranged along the axial direction in the grouting pipe 1, and the plurality of slurry outlet holes 111 are all within the moving stroke of the slurry outlet assembly 2 and all communicate with the grouting cavity. With such a setting, since the plurality of slurry outlet holes 111 are all within the moving stroke of the slurry outlet assembly 2, the operator can drive the slurry outlet assembly 2 to move and control the residence time of the output end of the slurry outlet part 21 at each slurry outlet hole 111, so that the amount of slurry output from the slurry outlet holes 111 at different positions is different, thereby realizing controllable layered directional grouting.

[0033] Furthermore, since the abutting surface of the slurry outlet part 21 is in sealed abutment with the inner wall of the grouting pipe 1, there is a large frictional force between the slurry outlet part 21 and the inner wall of the grouting pipe 1. In order to make the slurry outlet assembly 2 move more smoothly, in some embodiments, as Figure 1 shown, the slurry outlet part 21 is telescopically arranged in the radial direction of the grouting pipe 1. With such a setting, since the slurry outlet part 21 is telescopically arranged in the horizontal direction, when the slurry outlet part 21 contracts, the slurry outlet assembly 2 can move freely in the grouting cavity. When the slurry outlet assembly 2 moves to the corresponding position, the slurry outlet part 21 expands, and the abutting surface on the slurry outlet part 21 abuts against the inner wall of the grouting cavity, and the movement of the slurry outlet assembly 2 is restricted by the frictional force, ensuring the stable output of the slurry.

[0034] Furthermore, the specific manner in which the slurry outlet part 21 realizes telescoping is not limited, as long as it is ensured that the slurry outlet part 21 is telescopically arranged in the radial direction of the grouting pipe 1. For example, in some embodiments, as Figure 1 andFigure 2 As shown, at least part of the slurry discharging part 21 is made of an elastic material, and an inflation chamber is arranged therein. The slurry discharging assembly 2 further includes a pressurizing pipeline 23 for connecting with a pressurizing pump 300, and the pressurizing pipeline 23 is communicated with the inflation chamber. With such a setting, when the slurry discharging part 21 needs to expand, air is inflated into the inflation chamber in the slurry discharging part 21 through the pressurizing pipeline 23, and the inflation chamber starts to expand. Since at least part of the slurry discharging part 21 is made of an elastic material, at this time, the slurry discharging part 21 deforms and expands. When the slurry discharging part 21 needs to contract, air is sucked from the inflation chamber through the pressurizing pipeline 23, and the inflation chamber starts to contract, causing the slurry discharging part 21 to deform and contract.

[0035] Since the grouting section 11 extends into the grouting borehole, the operator cannot observe the position of the slurry outlet hole 111 in real time, resulting in a possible deviation between the position where the slurry is output from the slurry outlet hole 111 and the required position. Therefore, in some embodiments, such as Figure 1 and Figure 2 As shown, the grouting pipe 1 further includes a marking section 12 connected to the grouting section 11. The marking section 12 is located above the grouting borehole, and an indicating portion 121 is arranged on the outer wall of the marking section 12. The indicating portion 121 is located on the directional grouting line. With such a setting, the operator can observe the position of the slurry outlet hole 111 in real time through the indicating portion 121, and rotate the grouting pipe 1 to make the position where the slurry is output from the slurry outlet hole 111 consistent with the grouting required position.

[0036] Since the depth of the subway tunnel is relatively deep and the groundwater storage is large, the groundwater is poured back into the previously installed grouting pipe 1, affecting the subsequent grouting process. Therefore, in some embodiments, such as Figure 1 As shown, the grouting structure 100 further includes a sealing portion 3 for sealing the slurry outlet hole 111. The sealing portion 3 is detachably connected to the grouting pipe 1. With such a setting, by using the sealing portion 3 to seal the slurry outlet hole 111 in advance, it is avoided that groundwater is poured back into the grouting cavity when the grouting pipe 1 extends into the grouting borehole. When the slurry discharging part 21 outputs slurry, the pressure in the grouting cavity gradually increases, and the sealing portion 3 can be flushed open, enabling the slurry outlet hole 111 to output slurry normally.

[0037] Furthermore, in order to adapt to the high pressure, water-rich and silty sand geological conditions in deep strata, in some embodiments, such as Figure 1As shown, a thin-walled shell 4 is sleeved on the outer wall of the grouting pipe 1, and the grouting section 11 is located inside the thin-walled shell 4. The operator first fixes the grouting pipe 1 in the grouting borehole, and then pours and forms the thin-walled shell 4 between the outer wall of the grouting pipe 1 and the grouting borehole. The thin-walled shell 4 isolates the groundwater and the grouting pipe 1 to prevent the groundwater from flowing back into the grouting cavity and affecting the subsequent grouting process. When the slurry outlet 21 outputs the slurry, the pressure in the grouting cavity gradually increases, which can push open the sealing part 3 and break through the thin-walled shell 4, so that the slurry outlet holes 111 normally output the slurry.

[0038] In order to reduce the production cost of the grouting pipe 1 and facilitate transportation, in some embodiments, as Figure 1 shown, the grouting pipe 1 is provided in sections, and adjacent sections of the grouting pipe 1 are bonded by a waterproof tape 5. The operator first bonds multiple sections of the grouting pipe 1 through the waterproof tape 5 to assemble the entire grouting pipe 1, and then inserts the grouting pipe 1 into the grouting borehole.

[0039] In addition, the present invention also provides a grouting system 1000, which includes a slurry storage device 200 for storing and outputting slurry and the grouting structure 100. The slurry storage device 200 is connected to the grouting core pipe 22. The grouting structure 100 includes a grouting pipe 1 and a slurry outlet assembly 2. The slurry outlet assembly 2 includes a slurry outlet part 21 and a grouting core pipe 22 for transmitting slurry. The slurry outlet part 21 is arranged inside the grouting pipe 1. The slurry outlet part 21 has a contact surface that is hermetically abutted against the inner wall of the grouting pipe 1 to define a grouting cavity. The grouting core pipe 22 extends into the grouting pipe 1 and communicates with the grouting cavity through the slurry outlet part 21. The grouting pipe 1 includes a grouting section 11 extending into the grouting borehole. The pipe wall of the grouting section 11 is provided with slurry outlet holes 111 communicating with the grouting cavity, and the slurry outlet holes 111 are arranged in the grouting direction.

[0040] Specifically, the grouting system 1000 further includes a pressure pump 300 and a driving device 400. The pressure pump 300 is connected to the pressure pipeline 23 and inflates and sucks air into the air inflation cavity inside the slurry outlet part 21 through the pressure pipeline 23 to realize the expansion and contraction of the slurry outlet part 21. The driving device 400 includes, but is not limited to, a cylinder or other devices known to those skilled in the art that can drive the slurry outlet assembly 2 to move axially in the grouting pipe 1.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grouting structure, characterized in that: It includes a grouting pipe and a slurry outlet assembly, the slurry outlet assembly includes a slurry outlet portion and a grouting core pipe for transmitting slurry, the slurry outlet portion is arranged in the grouting pipe, the slurry outlet portion has an abutment surface that is sealed and abutted with the inner wall of the grouting pipe to define a grouting cavity, the grouting core pipe extends into the grouting pipe and is connected with the grouting cavity through the slurry outlet portion, the grouting pipe includes a grouting section that extends into the grouting borehole, a slurry outlet hole connected with the grouting cavity is opened on the pipe wall of the grouting section, and the slurry outlet hole is arranged toward the grouting direction.

2. The grouting structure according to claim 1, characterized in that: The side wall of the grouting pipe has a directional grouting line extending along the length direction of the grouting pipe. A plurality of grouting holes are provided. The plurality of grouting holes are distributed along the length direction of the grouting pipe and are all located on the directional grouting line.

3. The grouting structure according to claim 2, characterized in that: The slurry outlet assembly is arranged to move in the grouting pipe along its axial direction, and the plurality of slurry outlet holes are all located on the moving stroke of the slurry outlet assembly and are all connected to the grouting cavity.

4. The grouting structure according to claim 3, characterized in that: The slurry outlet portion is telescopically arranged in the radial direction of the grouting pipe.

5. The grouting structure according to claim 4, characterized in that: The slurry outlet portion is at least partially made of elastic material and is provided with an air-filled cavity therein. The slurry outlet assembly also includes a pressurized pipe connected to a pressure pump, and the pressurized pipe is communicated with the air-filled cavity.

6. The grouting structure according to claim 2, characterized in that: The grouting pipe also includes a marking section connected to the grouting section, the marking section is located above the grouting borehole, and an indicator is provided on the outer wall of the marking section, and the indicator is located on the directional grouting line.

7. The grouting structure according to claim 1, characterized in that: It also includes a sealing part for sealing the grouting hole, and the sealing part is detachably connected to the grouting pipe.

8. The grouting structure according to claim 7, characterized in that: The outer wall of the grouting pipe is covered with a thin-walled shell, and the grouting section is located in the thin-walled shell.

9. The grouting structure according to claim 1, characterized in that: The grouting pipe is arranged in sections, and two adjacent sections of the grouting pipe are bonded together by a waterproof tape.

10. A grouting system, characterized in that: It comprises a slurry storage device for storing and outputting slurry and a grouting structure as described in any one of claims 1 to 9, wherein the slurry storage device is connected to the grouting core pipe.

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