Grouting reinforcement structure for broken and weak rock mass in karst area

Abstract

The utility model provides a kind of karst region broken soft rock mass grouting reinforcement structure, including grouting pipe, the outer wall of grouting pipe is evenly distributed with four groups strip discharge port along circumference, sectional grouting component, the sectional grouting component uses independent grouting section of opening and closing, according to the soil layer situation selection grouting position;Grouting angle adjusting component, the grouting angle adjusting component is used to adjust the inclination angle of the grouting pipe, to facilitate grouting to the top of cave, the utility model relates to grouting reinforcement structure technical field, with external grouting pipeline and guide pipe are communicated, slurry is entered into grouting cavity by guide pipe, and it is permeated in soil layer by discharge port, slurry is solidified in soil layer and then the soil layer is reinforced, according to use demand, in grouting pipe, the second plug and first plug are moved so that grouting cavity is communicated with the discharge port of different position, and then accurately grouting is carried out to the crack of different position of soil layer, reduce the waste of slurry.

Description

Technical Field

[0001] This utility model relates to the field of grouting reinforcement structure technology, and in particular to a grouting reinforcement structure for fractured and weak rock masses in karst areas. Background Technology

[0002] Karst areas have complex geological conditions and often have adverse geological phenomena such as caves, karst fissures and broken and weak surrounding rocks, which lead to problems such as insufficient bearing capacity of the surrounding rock and uneven settlement. Grouting reinforcement technology is widely used in the treatment of broken and weak rock masses under such geological conditions because of its flexible construction and strong adaptability.

[0003] Currently, traditional grouting reinforcement technology mainly adopts single-pipe grouting or dual-liquid grouting methods, injecting grout into weak surrounding rock or karst caves through drilling. The grouting pipes are mostly used for single-point or fixed-interval grouting, which cannot adjust the grouting position for different rock masses, resulting in grout waste. Utility Model Content

[0004] The purpose of this invention is to provide a grouting reinforcement structure for fractured and weak rock masses in karst areas, so as to improve the accuracy of grouting locations for different soil layers.

[0005] This utility model provides a grouting reinforcement structure for fractured and weak rock masses in karst areas, including a grouting pipe with four sets of strip-shaped discharge ports evenly distributed circumferentially on the outer wall of the grouting pipe. Each set of discharge ports consists of four strip-shaped openings arranged at equal intervals along the axial direction. A segmented grouting assembly is also included, employing independently opening and closing grouting sections, with the grouting location selected according to the soil conditions. The structure also includes:

[0006] Grouting angle adjustment component, the grouting angle adjustment component is used to adjust the tilt angle of the grouting pipe in order to facilitate grouting to the top of the cavern;

[0007] The segmented grouting assembly includes:

[0008] A first plug and a second plug are spaced apart along the axial direction of the grouting pipe, forming a grouting cavity between them; the center of the first plug and the center of the second plug are connected by a connecting round pipe.

[0009] The first plug is equipped with a guide pipe, and the outlet of the guide pipe extends into the grouting cavity;

[0010] The outer walls of both the first and second plugs are covered with elastic sealing sleeves, the outer diameter of which is larger than the inner diameter of the grouting pipe, forming an interference fit sealing structure.

[0011] Preferably, the first plug block is further provided with an air guide pipe, which is used to connect to an external compressed air pipe to inject air into the grouting cavity.

[0012] Preferably, a scraper assembly is provided at the bottom end of the second plug;

[0013] The scraper assembly includes:

[0014] The motor is connected to the second plug block via a motor mount;

[0015] A scraper blade is connected to the output end of the motor via a rotating shaft.

[0016] Preferably, the scraper includes:

[0017] The center of the four-corner bracket is connected to the output end of the motor via a rotating shaft;

[0018] At least two scrapers, the top of which is fixedly connected to the four corner brackets, and the outer periphery of which abuts against the inner wall of the grouting pipe.

[0019] Preferably, the grouting angle adjustment component includes:

[0020] A sleeve is placed on the outer periphery of the grouting pipe, and the sleeve is connected to the grouting pipe by a positioning pin;

[0021] A rotating shaft, one end of which is fixedly connected to the outer periphery of the sleeve, and the other end of which is connected to a fixed disk via a bearing;

[0022] The outer periphery of the fixed plate is provided with slots, and the top of the fixed plate is provided with a suspension plate;

[0023] A locking element, which is used to lock the rotation angle of the rotating shaft.

[0024] Preferably, the locking element includes:

[0025] A circular ring is fixedly connected to the outer circumference of the rotating shaft. An ear plate is fixedly connected to the outer circumference of the circular ring, and the ear plate is connected to the slot by bolts.

[0026] Preferably, the top corner of the suspension plate is provided with a mounting hole.

[0027] Preferably, the inner surface of the sealing sleeve is provided with at least two annular protrusions, which are adapted to the outer peripheral grooves of the first plug and the second plug.

[0028] Preferably, the sealing sleeve is made of corrosion-resistant rubber material.

[0029] Preferably, the axis of the connecting circular pipe coincides with the axis of the grouting pipe.

[0030] This utility model provides a grouting reinforcement structure for fractured and weak rock masses in karst areas:

[0031] By using the first plug, the guide pipe, the second plug, the grouting chamber, the connecting pipe, and the sealing sleeve in combination, the grouting pipe is inserted into the pre-drilled hole. Then, the first and second plugs are inserted into the grouting pipe. The sealing sleeves on the outer walls of the first and second plugs are sealed to the grouting pipe, connecting the external grouting pipe and the guide pipe. The grout enters the grouting chamber through the guide pipe and penetrates into the soil layer through the outlet. After the grout solidifies in the soil layer, it reinforces the soil layer. According to the usage requirements, the second and first plugs are moved in the grouting pipe to connect the grouting chamber with the outlet at different positions, thereby accurately grouting cracks at different locations in the soil layer and reducing grout waste. Attached Figure Description

[0032] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of this utility model;

[0034] Figure 2 This is a schematic diagram of the connection structure of the first plug, the guide pipe, the air guide pipe, the second plug, and the grouting cavity in this utility model;

[0035] Figure 3 This is a schematic diagram of the connection structure of the motor, motor base, scraper, and rotating shaft in this utility model;

[0036] Figure 4 This is an assembly diagram of the grouting angle adjustment component and the grouting pipe in this utility model;

[0037] Figure 5 This is a schematic diagram of the structure of the sleeve, positioning pin, rotating shaft, and fixed plate in this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Grouting pipe, 2-Outlet, 3-Segmented grouting assembly, 31-First plug, 311-Guide pipe, 312-Air guide pipe, 32-Second plug, 33-Grouting chamber, 34-Connecting round pipe, 35-Sealing sleeve, 351-Annular protrusion, 4-Grouting angle adjustment assembly, 41-Sleeve, 411-Positioning pin, 42-Rotating shaft, 43-Fixing disc, 43a-Slot, 44-Suspension plate, 44a-Mounting hole, 45-Locking component, 451-Ring, 452-Ear plate, 453-Bolt, 5-Scraper assembly, 51-Motor, 511-Motor base, 52-Scraper blade, 521-Rotating shaft, 52a-Four-corner bracket, 52b-Scraper blade. Detailed Implementation

[0040] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0042] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this embodiment, as Figure 1 and Figure 2 As shown, a grouting reinforcement structure for fractured and weak rock masses in karst areas includes a grouting pipe 1, with four sets of strip-shaped discharge ports 2 evenly distributed circumferentially on the outer wall of the grouting pipe 1. Each set of discharge ports 2 consists of four strip-shaped openings arranged at equal intervals along the axial direction. A segmented grouting assembly 3 is used, which employs independently opening and closing grouting sections, and the grouting position is selected according to the soil conditions. A grouting angle adjustment assembly 4 is used to adjust the inclination angle of the grouting pipe 1 to facilitate grouting to the top of the rock cave.

[0044] The segmented grouting assembly 3 includes: a first plug 31 and a second plug 32. The first plug 31 and the second plug 32 are spaced apart along the axial direction of the grouting pipe 1, forming a grouting cavity 33 between them. The center position of the first plug 31 and the center position of the second plug 32 are connected by a connecting round pipe 34. A guide pipe 311 is disposed in the first plug 31, and the outlet of the guide pipe 311 extends into the grouting cavity 33. The outer walls of the first plug 31 and the second plug 32 are covered with elastic sealing sleeves 35. The outer diameter of the sealing sleeves 35 is larger than the inner diameter of the grouting pipe 1, forming an interference fit sealing structure.

[0045] Thus, the grouting pipe 1 is inserted into the pre-drilled hole, and then the first plug 31 and the second plug 32 are inserted into the grouting pipe 1. The sealing sleeves 35 on the outer walls of the first plug 31 and the second plug 32 are sealed with the grouting pipe 1, connecting the external grouting pipe and the guide pipe 311. The grout enters the grouting chamber 33 through the guide pipe 311 and penetrates into the soil layer through the outlet 2. After the grout solidifies in the soil layer, it reinforces the soil layer. According to the usage requirements, the second plug 32 and the first plug 31 are moved in the grouting pipe 1 so that the grouting chamber 33 is connected to the outlet 2 at different positions, thereby accurately grouting the cracks at different positions in the soil layer.

[0046] Specifically, by opening a strip-shaped outlet 2 on the surface of the grouting pipe 1, the grout discharge speed is faster than that of a round hole. The first plug 31 and the second plug 32 need to be inserted into the inner cavity of the grouting pipe 1 during use. The guide pipe 311 is connected to the external grouting equipment. The grout conducted through the guide pipe 311 is diverted in the grouting cavity 33 to the outlet 2. The connecting round pipe 34 connects the first plug 31 and the second plug 32. At the same time, the connecting round pipe 34 is also used to install the wires used by the motor 51. The setting of the sealing sleeve 35 increases the sealing degree between the first plug 31 and the second plug 32 and the grouting pipe 1.

[0047] The spacing between the outlets 2 and the number of outlets are determined according to the length of the grouting pipe 1. The distance between the first stopper 31 and the second stopper 32 (that is, the volume of the grouting chamber 33) can also be selectively set according to the grouting requirements.

[0048] In some embodiments, such as Figure 2 As shown, the first plug 31 is also equipped with an air guide pipe 312, which is used to connect to an external compressed air pipe to inject air into the grouting chamber 33.

[0049] Specifically, the air guide pipe 312 is used to conduct compressed air, which enters the grouting chamber 33 to clear the corresponding outlet 2 of the grouting chamber 33 and prevent the outlet 2 from becoming blocked.

[0050] In some embodiments, such as Figure 3 As shown, a scraper assembly 5 is provided at the bottom of the second stopper block 32;

[0051] The scraping assembly 5 includes: a motor 51, which is connected to the second stopper block 32 via a motor base 511; and a scraper 52, which is connected to the output end of the motor 51 via a rotating shaft 521.

[0052] Specifically, the motor 51 is installed at the bottom of the second plug 32 via the motor base 511. The wires of the motor 51 are connected to the connecting round pipe 34. The motor 51 provides power for the rotation of the scraper 52, and the scraper 52 cleans the residual material on the inner wall of the grouting pipe 1.

[0053] In some embodiments, such as Figure 3 As shown, the scraper 52 includes: a four-corner frame 52a, the center of which is connected to the output end of the motor 51 via a rotating shaft 521; at least two scrapers 52b, the top of which is fixedly connected to the four-corner frame 52a, and the outer periphery of which abuts against the inner wall of the grouting pipe 1.

[0054] Specifically, the four-corner frame 52a and the scraper 52b are components of the scraper 52. The scraper 52b rotates along the inner wall of the grouting pipe 1 to scrape off the excess material on the inner wall of the grouting pipe 1, thus maintaining the cleanliness of the inner wall of the grouting pipe 1. In addition, provided that the excess material on the inner wall of the grouting pipe 1 is scraped off, the scraper 52 can also be replaced by a scraper or other structure.

[0055] In some embodiments, such as Figure 4 and Figure 5 As shown, the grouting angle adjustment assembly 4 includes: a sleeve 41, which is placed on the outer periphery of the grouting pipe 1 and connected to the grouting pipe 1 by a positioning pin 411; a rotating shaft 42, one end of which is fixedly connected to the outer periphery of the sleeve 41, and the other end of which is connected to a fixed disk 43 by a bearing; the fixed disk 43 has grooves 43a distributed in annularly on its outer periphery, and a suspension plate 44 is disposed at the top of the fixed disk 43; and a locking member 45, which is used to lock the rotation angle of the rotating shaft 42.

[0056] Specifically, the sleeve 41 and the grouting pipe 1 are detachably connected to facilitate the adjustment of the position of the grouting pipe 1 in the sleeve 41. The rotating shaft 42 connects the sleeve 41 and the fixed plate 43, wherein the rotating shaft 42 rotates in the fixed plate 43 through the bearing. The adjacent slots 43a are arranged in a ring at a 15-degree angle. The suspension plate 44 is used to connect with the external tunnel top.

[0057] Furthermore, the slot 43a is just one way of connecting with the bolt 453, and the number of slots 43a can be designed to be multiple according to usage requirements.

[0058] In some embodiments, such as Figure 5 As shown, the locking member 45 includes: a ring 451, which is fixedly connected to the outer periphery of the rotating shaft 42, and an ear plate 452 is fixedly connected to the outer periphery of the ring 451. The ear plate 452 is connected to the slot 43a by bolts 453.

[0059] Specifically, the ring 451 rotates with the rotating shaft 42, the ear plate 452 is integrally formed with the ring 451, the bolt 453 is adapted to the slot 43a, and the bolt 453 is connected to the slot 43a to fix the position of the rotating shaft 42 after rotation, thereby constraining the tilt angle of the sleeve 41.

[0060] In some embodiments, such as Figure 5 As shown, a mounting hole 44a is provided at the top corner of the suspension plate 44;

[0061] Specifically, by opening mounting holes 44a at the top corner of the suspension plate 44, it is easy to fix the suspension plate 44 to the top of the tunnel through the mounting holes 44a. The installation position of the suspension plate 44 is adjusted according to the drilling position at the top of the tunnel.

[0062] In some embodiments, such as Figure 2 As shown, the inner surface of the sealing sleeve 35 is provided with at least two annular protrusions 351, which are adapted to the outer peripheral grooves of the first plug 31 and the second plug 32.

[0063] Specifically, the annular protrusion 351 is embedded in the groove on the outer periphery of the first plug 31 and the second plug 32 to increase the connection strength between the annular protrusion 351 and the first plug 31 and the second plug 32, and to prevent the sealing sleeve 35 from falling off when the first plug 31 and the second plug 32 are moved in the grouting pipe 1.

[0064] In some embodiments, such as Figure 2 As shown, the sealing sleeve 35 is made of corrosion-resistant rubber material;

[0065] Specifically, the sealing sleeve 35 can be made of nitrile rubber or fluororubber.

[0066] In some embodiments, such as Figure 2 As shown, the axis of the connecting circular pipe 34 coincides with the axis of the grouting pipe 1;

[0067] It should be noted that the connecting tube 34 is made of aluminum. The connecting tube 34 is used to store the cable connected to the motor 51. The cable is wrapped by the connecting tube 34 to prevent the slurry from dripping onto the motor 51.

[0068] The working principle of this application is illustrated below with a preferred embodiment:

[0069] Drilling was carried out on the weak soil base in the karst area, and then ground-penetrating radar was inserted into the borehole to detect cracks in the soil layer at different locations.

[0070] Insert the grouting pipe 1 into the borehole, and then insert the second plug 32 and the first plug 31 into the grouting pipe 1 in sequence. (Adjust the position of the second plug 32 and the first plug 31 in the grouting pipe 1 according to the crack position detected by the ground radar) so that the grouting chamber 33 is connected to the outlet 2. Connect the external compressed air pipe to the air guide pipe 312. Compressed air enters the grouting chamber 33 and is discharged through the outlet 2 to blow away the blockage blocking the outlet 2.

[0071] After the compressed air input is stopped, the external grouting pipe and the guide pipe 311 are connected. The grout enters the grouting chamber 33 through the guide pipe 311 and penetrates into the soil layer through the outlet 2. After the grout solidifies in the soil layer, it reinforces the soil layer. According to the usage requirements, the second stopper 32 and the first stopper 31 are moved in the grouting pipe 1 so that the grouting chamber 33 is connected to the outlet 2 at different positions, thereby grouting the cracks at different positions in the soil layer.

[0072] As the second plug 32 and the first plug 31 move upward in the grouting pipe 1, the motor 51 is started. The output end of the motor 51 drives the four-corner frame 52a to rotate through the rotating shaft 521. In turn, the four-corner frame 52a drives the scraper 52b to rotate along the inner wall of the grouting pipe 1 to clean the grout adhering to the inside of the grouting pipe 1.

[0073] When grouting reinforcement is required for the top of the tunnel, the suspension plate 44 is installed near the borehole according to the borehole location (the borehole is drilled at an angle of 15°-30° to the top of the tunnel). Then, the rotating shaft 42 is rotated in the fixed plate 43. The rotating shaft 42 drives the sleeve 41 to rotate 15°-30° so that its cavity is aligned with the borehole. At this time, the bolt 453 in the ear plate 452 is rotated and inserted into the corresponding slot 43a to fix the tilt angle of the sleeve 41. Then, the grouting pipe 1 is inserted into the borehole at the top of the tunnel along the cavity of the sleeve 41. The position of the grouting pipe 1 in the sleeve 41 is fixed by the positioning pin 411. The grouting cavity 33 is connected to the outlet 2 at different locations in the same way. Grout is injected through the guide pipe 311 to reinforce the soil layer at the top of the tunnel.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A grouting reinforcement structure for fractured and weak rock masses in karst areas, comprising a grouting pipe (1), wherein the outer wall of the grouting pipe (1) is evenly distributed with four sets of strip-shaped discharge ports (2) along the circumference, each set of discharge ports (2) consisting of four strip-shaped openings arranged at equal intervals along the axial direction, characterized in that, Also includes: The segmented grouting assembly (3) adopts independently openable and closed grouting sections, and the grouting position is selected according to the soil conditions; Grouting angle adjustment component (4), the grouting angle adjustment component (4) is used to adjust the tilt angle of the grouting pipe (1) so as to grout into the top of the cave. The segmented grouting assembly (3) includes: A first plug (31) and a second plug (32) are provided at intervals along the axial direction of the grouting pipe (1), forming a grouting cavity (33) between them; the center position of the first plug (31) and the center position of the second plug (32) are connected by a connecting round pipe (34); The first plug (31) is provided with a guide pipe (311), and the outlet of the guide pipe (311) extends into the grouting cavity (33); The outer walls of the first plug (31) and the second plug (32) are both covered with elastic sealing sleeves (35), the outer diameter of which is larger than the inner diameter of the grouting pipe (1), forming an interference fit sealing structure.

2. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 1, characterized in that, The first plug (31) is also provided with an air guide pipe (312), which is used to connect to an external compressed air pipe to inject air into the grouting chamber (33).

3. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 1, characterized in that, The bottom end of the second plug (32) is provided with a scraper assembly (5); The scraper assembly (5) includes: Motor (51), the motor (51) is connected to the second plug (32) via motor mount (511); The scraper (52) is connected to the output end of the motor (51) via a rotating shaft (521).

4. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 3, characterized in that, The scraper (52) includes: The four-corner bracket (52a) is connected to the output end of the motor (51) via a rotating shaft (521) at its center. At least two scrapers (52b) are provided, the top of which is fixedly connected to the four-corner frame (52a), and the outer periphery of which abuts against the inner wall of the grouting pipe (1).

5. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 1, characterized in that, The grouting angle adjustment component (4) includes: Sleeve (41), the sleeve (41) is placed on the outer periphery of the grouting pipe (1), and the sleeve (41) is connected to the grouting pipe (1) by a positioning pin (411); A rotating shaft (42) is provided, one end of which is fixedly connected to the outer periphery of the sleeve (41), and the other end of which is connected to the fixed disk (43) via a bearing. The outer periphery of the fixed disk (43) is provided with slots (43a), and the top of the fixed disk (43) is provided with a hanging plate (44); Locking member (45) is used to lock the rotation angle of the rotating shaft (42).

6. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 5, characterized in that, The locking element (45) includes: A circular ring (451) is fixedly connected to the outer periphery of the rotating shaft (42). An ear plate (452) is fixedly connected to the outer periphery of the circular ring (451). The ear plate (452) is connected to the slot (43a) by bolts (453).

7. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 5, characterized in that, The top corner of the suspension plate (44) is provided with a mounting hole (44a).

8. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 1, characterized in that, The inner surface of the sealing sleeve (35) is provided with at least two annular protrusions (351), which are adapted to the outer peripheral grooves of the first plug (31) and the second plug (32).

9. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 1, characterized in that, The sealing sleeve (35) is made of corrosion-resistant rubber material.

10. The grouting reinforcement structure for fractured and weak rock masses in karst areas according to claim 1, characterized in that, The axis of the connecting pipe (34) coincides with the axis of the grouting pipe (1).

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