A highway roadbed slope grouting reinforcement structure

Abstract

The present invention provides a highway roadbed slope grouting reinforcement structure, which relates to the technical field of slope reinforcement, and comprises a hollow pointed tube, a central plug rod, a three-way grouting pipe and injected cement mortar, and an inverted shell is designed as a reusable auxiliary part. The slope grouting reinforcement structure of the present invention has a simple construction process, does not require the use of drilling equipment, and the large head part of the cement mortar formed on the inner part of the inverted shell can better stabilize the sliding soil on the slope surface, thereby directly forming a stable slope protection structure. The present invention is applied to small-scale highway roadbed slope emergency repair and maintenance, temporary slope protection and other occasions, and has the advantage of significantly accelerating the progress of the project.

Description

Technical Field

[0001] The invention relates to the technical field of slope reinforcement, in particular to a highway roadbed slope grouting reinforcement structure. Background Art

[0002] The total mileage of expressways in my country has exceeded 5 million kilometers, making China a leading expressway country. Many of these expressways are built in mountainous areas and on steep cliffs. The protection of roadbed slopes in mountainous areas and on steep cliffs has become an important project. The protection of roadbed slopes is closely related to the safe operation of expressways and their ability to resist natural disasters.

[0003] Generally, anchor grouting is used to reinforce the slope, that is, drilling is performed first, threaded anchors are placed in the holes, and then grouting is performed to form a stable anchoring structure. However, in some slope protection projects, the roadbed slope protection work needs to be carried out in advance. The conventional anchor grouting method takes a long time. Therefore, the present invention provides a novel highway roadbed slope grouting reinforcement structure. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a highway roadbed slope grouting reinforcement structure, which solves the problems of inconvenient hole opening and long slope protection working cycle in the traditional anchor grouting method.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A highway roadbed slope grouting reinforcement structure, comprising:

[0007] A hollow pointed tube, wherein a first barb assembly and a second barb assembly are arranged on the side of the hollow pointed tube, wherein the first barb assembly and the second barb assembly are distributed at intervals along the axial direction of the hollow pointed tube, and the first barb assembly and the second barb assembly are distributed at an angle of 140°-220° in the circumferential direction of the hollow pointed tube;

[0008] A central insertion rod, wherein the central insertion rod has a flat wide portion, and when the central insertion rod is inserted into the hollow pointed tube, the tops of the first barb assembly and the second barb assembly are spread outward from the hollow pointed tube;

[0009] An inverted shell, wherein a center ring is fixedly arranged at the center position of the top of the inverted shell, the top end of the center insertion rod passes through the center hole of the center ring, and a circular through hole is opened at the top end of the inverted shell;

[0010] A three-way grouting pipe, wherein the first end of the three-way grouting pipe corresponds to the circular through hole, the second end of the three-way grouting pipe corresponds to the top opening of the hollow pointed tube, and the third end of the three-way grouting pipe corresponds to the interior of the inverted shell;

[0011] Cement mortar is injected from the first end of the three-way grouting pipe, and enters the inverted shell, the hollow pointed tube, the first barb assembly and the second barb assembly from the second end and the third end of the three-way grouting pipe. The cement mortar, the hollow pointed tube, the center plug rod and the three-way grouting pipe together constitute a slope grouting reinforcement structure.

[0012] Preferably, the hollow pointed tube comprises:

[0013] A cylinder body, the top end of which is open, a pointed tip is fixedly connected to the bottom end of the cylinder body, two side holes corresponding to the first barb assembly and the second barb assembly are provided on the side of the cylinder body, a plurality of groups of vertically arranged side wings are fixedly connected to the outer side of the cylinder body, an annular recess is provided on the outer side of the cylinder body, the annular recess is located at the side hole, a group of clamping plates are fixedly connected to the inner side of the cylinder body and close to the bottom end of the cylinder body, the clamping plates correspond to the flat and wide part of the center plug rod, and the clamping plates are in the shape of a fan ring.

[0014] Preferably, the bottom port of the inverted shell is provided with an annular portion, and an annular seal is clamped at the bottom of the annular portion of the inverted shell. The annular seal is made of flexible material, and a nut assembly is threadedly connected on the center plug rod and located above the inverted shell.

[0015] Preferably, the central insertion rod comprises:

[0016] A cylindrical section, wherein a threaded section is disposed at the top end of the cylindrical section, a flat wide portion is disposed at the bottom end of the cylindrical section, and a guide head is disposed at the bottom end of the flat wide portion;

[0017] The flat wide portion includes an upper gradient section and a lower gradient section that are symmetrically arranged. The cross-sectional shape of the intersection of the upper gradient section and the lower gradient section is an ellipse. The top cross-sectional shape of the upper gradient section and the bottom cross-sectional shape of the lower gradient section are both circular.

[0018] Preferably, the three-way grouting pipe comprises:

[0019] A first branch pipe, a second branch pipe, and a third branch pipe, the first end of the first branch pipe, the first end of the second branch pipe, and the first end of the third branch pipe are connected together, and the interiors of the first branch pipe, the second branch pipe, and the third branch pipe are connected, the second end of the first branch pipe is inserted downward into the interior of the hollow pointed tube, and the side of the first branch pipe is provided with an arc-shaped recess that cooperates with the outer side of the center insertion rod, the second end of the third branch pipe is fixedly connected to a guide cone member, and the large port of the guide cone member is located on the outside of the inverted shell.

[0020] Preferably, the first barb assembly comprises:

[0021] An arc-shaped plate, wherein the arc-shaped plate corresponds to the side hole, and the outer edge of the arc-shaped plate is larger than the inner edge of the side hole, so that the arc-shaped plate cannot enter the interior of the cylinder;

[0022] A thin-walled ring sleeve, the inner side of which is fixedly connected to the outer side of the arc-shaped plate, and the thin-walled ring sleeve corresponds to the annular notch;

[0023] A plurality of fan rings are fixedly connected to the inner side of the arc-shaped plate and close to the top end of the arc-shaped plate, and support ribs are fixedly connected between the plurality of fan rings;

[0024] The second barb assembly has the same structure as the first barb assembly.

[0025] Preferably, it also includes:

[0026] The guide member includes an annular end portion, the bottom end of which is fixedly connected with an insertion tube, the outer diameter of the insertion tube corresponds to the top end of the hollow pointed tube, the inner diameter of the insertion tube corresponds to the outer diameter of the central insertion rod, and the bottom end of the insertion tube is provided with a guiding cone.

[0027] Preferably, the inner diameter of the inverted shell is 10-20 times the outer diameter of the hollow pointed tube.

[0028] Preferably, the length of the hollow pointed tube is 0.5m-1m.

[0029] Preferably, a disposable oil film is provided on the inner side of the inverted shell.

[0030] The present invention provides a highway roadbed slope grouting reinforcement structure, which has the following beneficial effects:

[0031] 1. The present invention designs a hollow pointed tube, a central plug rod, and an inverted shell. The first barb assembly and the second barb assembly are spirally distributed on the side of the hollow pointed tube. After the hollow pointed tube is driven into the roadbed slope to be reinforced, the central plug rod is driven into the interior of the hollow pointed tube. Relying on the flat and wide part of the side of the central plug rod, the tops of the first barb assembly and the second barb assembly are expanded to the outside of the hollow pointed tube. Then, the inverted shell is put on, and the inverted shell forms a relatively sealed space with the slope soil below. Then, cement mortar is injected from the first end of the three-way grouting pipe, and the cement mortar enters the inverted shell, the hollow pointed tube, and the first barb assembly and the second barb assembly. After the cement mortar solidifies, the inverted shell is removed to form a slope grouting reinforcement structure composed of cement mortar, hollow pointed tube, central plug rod and three-way grouting pipe. The construction process of the slope grouting reinforcement structure is simple and does not require drilling equipment. The large head of the cement mortar formed on the inner part of the inverted shell can better stabilize the sliding soil on the slope surface, thereby directly forming a stable slope protection structure. Compared with the method of anchor grouting for slope reinforcement and then casting criss-crossing ground beams, the present invention is used in small-scale highway roadbed slope emergency repair and maintenance, temporary slope protection and other occasions, and has the advantage of significantly accelerating the progress of the project.

[0032] 2. The present invention, by designing the first barb assembly and the second barb assembly, forms an undercut structure integrated with the cement mortar after the poured cement mortar solidifies, which can improve the stability of the slope grouting reinforcement structure and the slope soil, especially the pull-out resistance of the slope grouting reinforcement structure.

[0033] 3. The present invention designs a three-way grouting pipe, wherein the first end of the three-way grouting pipe corresponds to the circular through hole, the second end of the three-way grouting pipe corresponds to the top of the hollow pointed tube, and the third end of the three-way grouting pipe corresponds to the interior of the inverted shell. The grouting system (composed of a tank body, a pump body, a pipeline, and a valve carried by a grouting vehicle) injects cement mortar into the first end of the three-way grouting pipe, and the cement mortar first fills the inverted shell and then overflows from the third end of the three-way grouting pipe into the inverted shell. This process can ensure that a sufficient amount of cement mortar is flushed into the hollow pointed tube, avoid the phenomenon of hollow cement mortar in the hollow pointed tube, and improve the reliability of the slope grouting reinforcement structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A three-dimensional view of a highway roadbed slope grouting reinforcement structure proposed by the present invention;

[0035] Figure 2 It is a front view of a highway roadbed slope grouting reinforcement structure proposed by the present invention;

[0036] Figure 3It is a three-dimensional schematic diagram of a three-way grouting pipe, a hollow pointed tube, and a central plug rod of a highway roadbed slope grouting reinforcement structure proposed by the present invention;

[0037] Figure 4 It is a three-dimensional schematic diagram of a hollow pointed tube of a highway roadbed slope grouting reinforcement structure proposed by the present invention;

[0038] Figure 5 It is a three-dimensional schematic diagram of a hollow pointed tube of a highway roadbed slope grouting reinforcement structure proposed by the present invention;

[0039] Figure 6 A three-dimensional schematic diagram of a barb assembly of a highway roadbed slope grouting reinforcement structure proposed by the present invention;

[0040] Figure 7 A three-dimensional schematic diagram of a central insertion rod of a highway roadbed slope grouting reinforcement structure proposed by the present invention;

[0041] Figure 8 for Figure 5 A partial enlarged view of the middle part;

[0042] Fig. 9 A three-dimensional schematic diagram of a guide member of a highway roadbed slope grouting reinforcement structure proposed by the present invention;

[0043] Fig.10 This is a schematic diagram of a central insertion rod of a highway roadbed slope grouting reinforcement structure proposed by the present invention being inserted into a hollow pointed tube.

[0044] Among them, 1. inverted shell; 101. center ring; 102. circular through hole; 2. annular seal; 3. hollow pointed tube; 301. cylinder; 302. side hole; 303. pointed head; 304. side wing; 305. annular recess; 306. clamping plate; 4. center plug rod; 401. cylindrical section; 402. upper gradient section; 403. lower gradient section; 404. guide head; 405. threaded section; 5. three-way grouting pipe; 501. first branch pipe; 502. second branch pipe; 503. third branch pipe; 504. guide cone member; 6. first barb assembly; 601. arc plate member; 602. fan ring member; 603. support rib; 604. thin-walled ring sleeve; 7. second barb assembly; 8. guide member; 801. annular end; 802. insertion tube; 802a. guide cone mouth. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] Embodiment 1:

[0047] like Figure 1-Figure 10 As shown, an embodiment of the present invention provides a highway roadbed slope grouting reinforcement structure, including: a hollow pointed tube 3, a central plug rod 4, a three-way grouting pipe 5 and injected cement mortar, and the inverted shell 1 is a reusable auxiliary part, which is used to improve the convenience of roadbed slope grouting operation, so that the highway roadbed slope grouting reinforcement has the advantages of simple operation, easy use and accelerated project progress.

[0048] Specifically, the side of the hollow pointed tube 3 is provided with a first barb assembly 6 and a second barb assembly 7, the first barb assembly 6 and the second barb assembly 7 are distributed along the axial direction of the hollow pointed tube 3 at intervals, and the first barb assembly 6 and the second barb assembly 7 are distributed at an angle of 140°-220° in the circumferential direction of the hollow pointed tube 3, as shown in FIG. Figure 4 As shown in , it can also be considered that the first barb assembly 6 and the second barb assembly 7 are spirally distributed on the side of the hollow pointed tube 3, and the central insertion rod 4 has a flat and wide portion. When the central insertion rod 4 is inserted into the hollow pointed tube 3, the tops of the first barb assembly 6 and the second barb assembly 7 are expanded to the outside of the hollow pointed tube 3, so that the first barb assembly 6 and the second barb assembly 7 form an inverted structure, thereby increasing the stability of the connection between the hollow pointed tube 3 and the slope soil, especially after the cement mortar injected into the hollow pointed tube 3 solidifies, the first barb assembly 6 and the second barb assembly 7 cannot return to their original positions, which can improve the stability of the slope grouting reinforcement structure and the slope soil, especially the pull-out resistance of the slope grouting reinforcement structure.

[0049] A center ring 101 is fixedly provided at the center position of the top of the inverted shell 1, and the top of the center plug rod 4 passes through the center hole of the center ring 101. A circular through hole 102 is opened at the top of the inverted shell 1, and the first end of the three-way grouting pipe 5 corresponds to the circular through hole 102. The grouting system (composed of a tank body, a pump body, a pipeline and a valve carried by a grouting vehicle) injects cement mortar from the first end of the three-way grouting pipe, and the second end of the three-way grouting pipe 5 corresponds to the top opening of the hollow pointed tube 3, and the third end of the three-way grouting pipe 5 corresponds to the interior of the inverted shell 1. The cement mortar is injected from the first end of the three-way grouting pipe 5 and enters the inverted shell 1, the hollow pointed tube 3 and the first barb assembly 6 and the second barb assembly 7 from the second and third ends of the three-way grouting pipe 5. The cement mortar (solidified cement mortar) and the hollow pointed tube 3, the center plug rod 4 and the three-way grouting pipe 5 together constitute a slope grouting reinforcement structure.

[0050] The first barb assembly 6 and the second barb assembly 7 are spirally distributed on the side of the hollow pointed tube 3. After the hollow pointed tube 3 is driven into the roadbed slope to be reinforced, the center plug rod 4 is driven into the interior of the hollow pointed tube 3 (using a pile driver or manually knocking it into the slope soil). Relying on the flat and wide part of the side of the center plug rod 4, the tops of the first barb assembly 6 and the second barb assembly 7 are expanded to the outside of the hollow pointed tube 3, and then the inverted shell 1 is put on, and the inverted shell 1 forms a relatively sealed space with the slope soil below; then cement mortar is injected from the first end of the three-way grouting pipe 5, and the cement mortar enters the inverted shell 1, the hollow pointed tube 3, and the first barb assembly 6 and the second barb assembly At part 7, after the cement mortar solidifies, the inverted shell 1 is removed to form a slope grouting reinforcement structure composed of cement mortar, hollow pointed tube 3, central plug rod 4, and three-way grouting pipe 5. The construction process of the slope grouting reinforcement structure is simple, and no drilling equipment is required. Moreover, the large head of the cement mortar formed on the inner part of the inverted shell 1 can better stabilize the sliding soil on the slope surface, thereby directly forming a stable slope protection structure. Compared with the method of using anchor grouting to reinforce the slope and then pouring the horizontal and vertical staggered ground beams, this solution is used in small-scale highway roadbed slope emergency repair and maintenance, temporary slope protection and other occasions, and has the advantage of significantly accelerating the progress of the project.

[0051] Of course, this solution can also be applied to large-scale slope reinforcement sites, by arranging multiple groups of slope grouting reinforcement structures in an array manner, and connecting metal trusses at the top of the central plug rods 4 of adjacent slope grouting reinforcement structures, thereby ensuring the overall stability of the multiple groups of slope grouting reinforcement structures.

[0052] In one embodiment, the hollow pointed tube 3 includes: a tube body 301, the top end of the tube body 301 is open, the bottom end of the tube body 301 is fixedly connected with a pointed head 303, the pointed head 303 makes it easier to drive the bottom end of the tube body 301 into the slope soil, the side of the tube body 301 is provided with two side holes 302 corresponding to the first barb assembly 6 and the second barb assembly 7, the two side holes are used to install the first barb assembly 6 and the second barb assembly 7 respectively, and the outer side surface of the tube body 301 is fixedly connected with a plurality of groups of vertically arranged The side wings 304 are arranged vertically and do not affect the cylinder 301 from being driven downward into the slope soil. The side wings 304 can limit the rotation of the cylinder 301 itself during the process of being driven downward into the slope soil. An annular recess 305 is provided on the outer side of the cylinder 301, and the annular recess 305 is located at the side hole 302. A group of clamping plates 306 are fixedly connected to the inner side of the cylinder 301 and close to the bottom end of the cylinder 301. The clamping plates 306 correspond to the flat and wide part of the central insertion rod 4, and the clamping plates 306 are in the shape of a fan ring.

[0053] When the center rod 4 is driven into the bottom of the hollow pointed tube 3, the flat and wide part of the center rod 4 has passed over the first barb assembly 6 and the second barb assembly 7, that is, the tops of the first barb assembly 6 and the second barb assembly 7 have been unfolded to the outside of the hollow pointed tube 3. At this time, the user can rotate the center rod 4 to make the clamping plate 306 and the flat and wide part of the center rod 4 stuck, so that the center rod 4 cannot be pulled out of the hollow pointed tube 3.

[0054] In one embodiment, the bottom port of the inverted shell 1 is provided with an annular portion, and the bottom of the annular portion of the inverted shell 1 is clamped with an annular seal 2, and the annular seal 2 and the annular portion of the inverted shell 1 are detachably connected. The inverted shell 1 can be reused. If the annular seal 2 is worn, a new annular seal 2 can be replaced. The annular seal 2 is made of a flexible material, such as rubber material, so that when it is pressed on the slope ground, the annular seal 2 can form a sealed contact with the slope ground. A nut assembly is threadedly connected on the center plug rod 4 and located above the inverted shell 1, and the nut assembly is pressed on the top of the inverted shell 1 (it has been introduced above that the clamping plate 306 is stuck with the flat and wide part of the center plug rod 4, and the center plug rod 4 cannot pull out the hollow pointed tube 3). By tightening the nut assembly, the annular seal 2 at the bottom of the inverted shell 1 can stably squeeze the slope soil.

[0055] In one embodiment, the central insertion rod 4 includes: a cylindrical section 401, a threaded section 405 is disposed at the top of the cylindrical section 401, a flat wide portion is disposed at the bottom of the cylindrical section 401, and a guide head 404 is disposed at the bottom of the flat wide portion.

[0056] The external thread at the threaded section 405 is used in conjunction with the nut assembly, and the guide head 404 makes it easier for the bottom end of the central insertion rod 4 to enter the hollow pointed tube 3 and to push the first barb assembly 6 and the second barb assembly 7.

[0057] The flat and wide portion includes an upper gradient section 402 and a lower gradient section 403 which are symmetrically arranged. The cross-sectional shape of the intersection of the upper gradient section 402 and the lower gradient section 403 is elliptical. The top cross-section of the upper gradient section 402 and the bottom cross-section of the lower gradient section 403 are both circular. The intersection of the upper gradient section 402 and the lower gradient section 403 is the flattest and widest.

[0058] The cylindrical section 401 , the threaded section 405 , the upper gradient section 402 , the lower gradient section 403 and the guide head 404 are of an integrated structure.

[0059] In one embodiment, the three-way grouting pipe 5 includes: a first branch pipe 501, a second branch pipe 502, and a third branch pipe 503. The first end of the first branch pipe 501, the first end of the second branch pipe 502, and the first end of the third branch pipe 503 are connected together, and the interiors of the first branch pipe 501, the second branch pipe 502, and the third branch pipe 503 are connected. The second end of the first branch pipe 501 is inserted downward into the interior of the hollow pointed tube 3, and the side of the first branch pipe 501 is provided with an arc-shaped recess that cooperates with the outer side of the center insertion rod 4. The second end of the third branch pipe 503 is fixedly connected to a guide cone member 504, and the large end of the guide cone member 504 is located on the outside of the inverted shell 1.

[0060] The guiding cone member 504 is pressed downward against the edge of the circular through hole 102 of the inverted shell 1 to form a seal. The guiding cone member 504 is used to guide cement mortar so as to inject cement mortar into the third branch pipe 503 .

[0061] In one embodiment, the first barb assembly 6 includes: an arc-shaped plate 601, a thin-walled ring sleeve 604 and a plurality of fan rings 602, wherein the arc-shaped plate 601 corresponds to the side hole 302, and the outer edge of the arc-shaped plate 601 is larger than the inner edge of the side hole 302, so that the arc-shaped plate 601 cannot enter the interior of the cylinder 301. Figure 6 , Figure 8 As shown in, the vertical side of the side hole 302 is set to a structure with a large outside and a small inside, and the vertical side of the arc plate 601 is set to a structure with a large outside and a small inside, so as to ensure that the arc plate 601 can enter the side hole 302, but the arc plate 601 cannot pass through the side hole 302 to enter the inside of the cylinder 301, the inner side of the thin-walled ring sleeve 604 is fixedly connected to the outer side of the arc plate 601, and the thin-walled ring sleeve 604 corresponds to the annular recess 305, the thin-walled ring sleeve 604 is used to keep the arc plate 601 inside the side hole 302, to ensure that the hollow pointed tube 3 is smoothly driven into the slope soil, the arc plate 601 is pushed outward under the action of the central insertion rod 4, so that the thin-walled ring sleeve 604 breaks, and a plurality of fan rings 602 are fixedly connected to the inner side of the arc plate 601 and close to the top of the arc plate 601, and support ribs 603 are fixedly connected between the plurality of fan rings 602.

[0062] When the center rod 4 is inserted downward, the flat and wide part of the center rod 4 is located on the inner side of the fan ring 602. Since the inner side of the fan ring 602 is arc-shaped, it can limit the rotation of the center rod 4. As the center rod 4 is driven downward into the hollow pointed tube 3, the flat and wide part of the center rod 4 pushes the fan ring 602 outward, thereby causing the arc plate 601 to squeeze the slope soil outside the hollow pointed tube 3 outward, causing the arc plate 601 to expand outward to form an inverted structure.

[0063] The second barb assembly 7 has the same structure as the first barb assembly 6 , and the difference between the second barb assembly 7 and the first barb assembly 6 is that the second barb assembly 7 is installed at a different position.

[0064] In one embodiment, it also includes: a guide member 8, the guide member 8 includes an annular end portion 801, the bottom end of the annular end portion 801 is fixedly connected with an insertion tube 802, the outer diameter of the insertion tube 802 corresponds to the top end of the hollow pointed tube 3, the inner diameter of the insertion tube 802 corresponds to the outer diameter of the central insertion rod 4, and the bottom end of the insertion tube 802 is provided with a guide cone 802a.

[0065] When the hollow pointed tube 3 is driven into the slope soil, the insertion tube 802 of the guide member 8 is inserted into the top of the hollow pointed tube 3, and the knocking force acts on the annular end 801 at the top of the guide member 8, thereby avoiding deformation of the top of the hollow pointed tube 3. When the center insertion rod 4 is driven into the interior of the hollow pointed tube 3, the center insertion rod 4 is inserted into the inner side of the insertion tube 802, thereby ensuring that the center insertion rod 4 is located at the center position of the hollow pointed tube 3 and inserted downward.

[0066] In one embodiment, the inner diameter of the inverted shell 1 is 8-11 times the outer diameter of the hollow pointed tube 3. Generally, the outer diameter of the hollow pointed tube 3 is designed to be 90-140 mm, and the inner diameter of the inverted shell 1 is 800-1500 mm, ensuring that the cement mortar structure formed on the inner side of the inverted shell 1 can prevent the sliding soil.

[0067] In one embodiment, the length of the hollow pointed tube 3 is 0.5m-1m, so as to ensure that the hollow pointed tube 3 has a sufficient depth and prevent the slope soil part of the hollow pointed tube 3 from sliding off as a whole.

[0068] In one embodiment, a disposable oil film is provided on the inner side of the inverted shell 1, for example, a plastic wrap is used to facilitate the disassembly of the inverted shell 1 (to prevent the inverted shell 1 from sticking to the cement mortar).

[0069] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A highway roadbed slope grouting reinforcement structure, characterized in that: include: A hollow pointed tube (3), wherein a first barb assembly (6) and a second barb assembly (7) are arranged on the side of the hollow pointed tube (3), wherein the first barb assembly (6) and the second barb assembly (7) are spaced apart along the axial direction of the hollow pointed tube (3), and the first barb assembly (6) and the second barb assembly (7) are distributed at an angle of 140°-220° in the circumferential direction of the hollow pointed tube (3); A central insertion rod (4), wherein the central insertion rod (4) has a flat wide portion, and when the central insertion rod (4) is inserted into the hollow pointed tube (3), the tops of the first barb assembly (6) and the second barb assembly (7) are spread outward from the hollow pointed tube (3); An inverted shell (1), wherein a center ring (101) is fixedly arranged at the center position of the top of the inverted shell (1), the top end of the center insertion rod (4) passes through the center hole of the center ring (101), and a circular through hole (102) is opened at the top end of the inverted shell (1); A three-way grouting pipe (5), wherein a first end of the three-way grouting pipe (5) corresponds to the circular through hole (102), a second end of the three-way grouting pipe (5) corresponds to the top opening of the hollow pointed tube (3), and a third end of the three-way grouting pipe (5) corresponds to the interior of the inverted shell (1); Cement mortar, the cement mortar is injected from the first end of the three-way grouting pipe (5), and enters the inverted shell (1), the hollow pointed tube (3), the first barb assembly (6), and the second barb assembly (7) from the second end and the third end of the three-way grouting pipe (5), and the cement mortar, the hollow pointed tube (3), the central plug rod (4), and the three-way grouting pipe (5) together form a slope grouting reinforcement structure; The hollow pointed tube (3) comprises: A cylinder (301), the top end of the cylinder (301) is open, the bottom end of the cylinder (301) is fixedly connected with a pointed head (303), the side of the cylinder (301) is provided with two side holes (302) corresponding to the first barb assembly (6) and the second barb assembly (7), the outer side of the cylinder (301) is fixedly connected with a plurality of groups of vertically arranged side wings (304), the outer side of the cylinder (301) is provided with an annular recess (305), the annular recess (305) is located at the side hole (302), the inner side of the cylinder (301) and close to the bottom end of the cylinder (301) is fixedly connected with a group of clamping plates (306), the clamping plates (306) correspond to the flat wide part of the central plug rod (4), and the clamping plates (306) are in the shape of a fan ring; The first barb assembly (6) comprises: An arc-shaped plate (601), wherein the arc-shaped plate (601) corresponds to the side hole (302), and the outer edge of the arc-shaped plate (601) is larger than the inner edge of the side hole (302), so that the arc-shaped plate (601) cannot enter the interior of the cylinder (301); A thin-walled ring sleeve (604), the inner side of which is fixedly connected to the outer side of the arc-shaped plate (601), and the thin-walled ring sleeve (604) corresponds to the annular notch (305); A plurality of fan ring members (602) are fixedly connected to the inner side of the arc-shaped plate member (601) and close to the top end of the arc-shaped plate member (601), and support ribs (603) are fixedly connected between the plurality of fan ring members (602); The second barb assembly (7) has the same structure as the first barb assembly (6).

2. A highway roadbed slope grouting reinforcement structure according to claim 1, characterized in that: The bottom port of the inverted shell (1) is provided with an annular portion, and the bottom of the annular portion of the inverted shell (1) is clamped with an annular seal (2), the annular seal (2) is made of a flexible material, and a nut assembly is threadedly connected on the central insertion rod (4) and located above the inverted shell (1).

3. A highway roadbed slope grouting reinforcement structure according to claim 1, characterized in that: The central insertion rod (4) comprises: A cylindrical section (401), wherein a threaded section (405) is disposed at the top end of the cylindrical section (401), a flat wide portion is disposed at the bottom end of the cylindrical section (401), and a guide head (404) is disposed at the bottom end of the flat wide portion; The flat wide portion comprises an upper gradient section (402) and a lower gradient section (403) which are symmetrically arranged. The cross-sectional shape of the junction of the upper gradient section (402) and the lower gradient section (403) is an ellipse. The top cross-sectional shape of the upper gradient section (402) and the bottom cross-sectional shape of the lower gradient section (403) are both circular.

4. A highway roadbed slope grouting reinforcement structure according to claim 3, characterized in that: The three-way grouting pipe (5) comprises: A first branch pipe (501), a second branch pipe (502), and a third branch pipe (503); the first end of the first branch pipe (501), the first end of the second branch pipe (502), and the first end of the third branch pipe (503) are connected together, and the interiors of the first branch pipe (501), the second branch pipe (502), and the third branch pipe (503) are connected; the second end of the first branch pipe (501) is inserted downward into the interior of the hollow pointed tube (3), and the side surface of the first branch pipe (501) is provided with an arc-shaped recess that matches the outer side surface of the central insertion rod (4); the second end of the third branch pipe (503) is fixedly connected to a guide cone member (504), and the large end of the guide cone member (504) is located on the outside of the inverted shell (1).

5. The highway roadbed slope grouting reinforcement structure according to claim 1 is characterized by: Also includes: A guide member (8), the guide member (8) comprising an annular end portion (801), the bottom end of the annular end portion (801) being fixedly connected to an insertion tube (802), the outer diameter of the insertion tube (802) corresponding to the top end portion of the hollow pointed tube (3), the inner diameter of the insertion tube (802) corresponding to the outer diameter of the central insertion rod (4), and the bottom end of the insertion tube (802) being provided with a guiding cone (802a).

6. The highway roadbed slope grouting reinforcement structure according to claim 1, characterized in that: The inner diameter of the inverted shell (1) is 10-20 times the outer diameter of the hollow pointed tube (3); the length of the hollow pointed tube (3) is 0.5m-1m.

7. A highway roadbed slope grouting reinforcement structure according to claim 1, characterized in that: A disposable oil film is arranged on the inner side of the inverted housing (1).

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