Fabricated self-locking permeable slope protection with grouting and anchoring system and construction method of fabricated self-locking permeable slope protection

Abstract

The invention discloses an assembly type self-locking permeable slope protection with a grouting anchoring system and a construction method thereof, and relates to the technical field of geotechnical engineering and ecological slope protection, the assembly type self-locking permeable slope protection comprises a plurality of prefabricated concrete blocks laid on the slope surface of a side slope, and the outer side wall of each prefabricated concrete block is provided with a slope protection plate distributed annularly; every two adjacent prefabricated concrete block bodies are connected in a meshed mode through the corresponding slope protection plate to form a slope protection structure, and an anchoring system inserted into the ground is arranged on each prefabricated concrete block body, so that a high-strength anchoring unit under the combined action of an expansion head anchoring body and an anchor rod is formed in the stratum below the prefabricated block bodies; the connection between the slope protection structure and the deep stable soil body is enhanced, so that the pulling resistance and the overall stability of the whole slope protection system are improved, and the influence caused by rain wash and soil body stress change is effectively resisted.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering and ecological slope protection technology, specifically to a prefabricated self-locking permeable slope protection system with grouting anchoring system and its construction method. Background Technology

[0002] In slope protection engineering, prefabricated self-locking permeable slope protection is widely used due to its convenient construction, stable structure and eco-friendly nature. This type of slope protection mainly relies on prefabricated concrete blocks with self-locking structures to interlock with each other on the slope surface to form a cover layer to resist surface soil erosion and shallow sliding.

[0003] However, this type of slope protection structure, which mainly relies on the interlocking of blocks, is vulnerable in slope environments with relatively loose soil. Because the self-stabilizing ability of the entire structural system is highly dependent on the support of the slope soil on the block array, when the slope is subjected to continuous erosion and seepage by rainwater or changes in soil stress, the soft subgrade cannot provide sufficient anchoring force, which can easily lead to a decrease in the overall integrity of the spliced ​​slope protection structure, and thus the risk of local loosening, displacement or even collapse. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated self-locking permeable slope protection with a grouting anchoring system and its construction method, so as to solve the technical defects of existing prefabricated slope protection in loose soil slope environment, where the traditional slope protection structure that relies solely on the splicing of precast concrete blocks is prone to overall loosening, displacement or even instability due to insufficient anchoring force with the foundation.

[0005] Firstly, to achieve the above objectives, the present invention provides the following technical solution: a prefabricated self-locking permeable slope protection system with a grouting anchoring system, comprising multiple precast concrete blocks laid on the slope surface, each precast concrete block having a ring-shaped slope protection plate on its outer side wall, adjacent precast concrete blocks being interlocked through the slope protection plates to form a slope protection structure, and the precast concrete blocks being equipped with an anchoring system inserted into the ground.

[0006] The anchoring system includes an installation sleeve that is movably inserted into the precast concrete block, an anchor rod that passes through the precast concrete block, a grouting pipe that passes through the installation sleeve and has annularly distributed grout outlet holes on its wall, an enlarged grouting assembly fixed to the bottom of the installation sleeve, and a spiral drill bit located at the bottom of the enlarged grouting assembly.

[0007] Furthermore, the cross-section of the precast concrete block is polygonal, and each precast concrete block has a ring of dovetail grooves distributed on its outer side wall. The number of dovetail grooves is not less than four. The slope protection slab is integrally formed by precast concrete. The slope protection slab consists of a smooth plate section in the middle and dovetail tenons at both ends. The dovetail tenons and the dovetail grooves interlock with each other.

[0008] Furthermore, a vertical mounting hole is provided at the center of the precast concrete block. The vertical cross-sectional profile of the mounting hole is an inverted convex shape. The mounting sleeve is a high-density polyethylene pipe or a galvanized steel pipe, and the mounting sleeve cooperates with the mounting hole.

[0009] Furthermore, the grout outlet is provided in at least two layers on the grouting pipe, and the outer wall of the grouting pipe is provided with a vertical threaded portion.

[0010] Furthermore, the anchor rod vertically penetrates the precast concrete block, and the number of anchor rods installed on the precast concrete block is not less than two.

[0011] Furthermore, the enlarged grouting assembly includes an installation frame, a positioning ring, a driving component, a first mounting block, a first pin, a second pin, a second mounting block, a guide plate, and a hole-expanding blade. The installation frame is hollow inside, the driving component is fixedly installed inside the installation frame, the positioning ring is fixedly connected to the piston rod end of the driving component, and the first mounting blocks are arranged in pairs, with multiple pairs of first mounting blocks distributed circumferentially at intervals along the outer wall of the positioning ring.

[0012] Furthermore, the first pin is rotatably connected between the two mounting blocks in each pair. The guide plates are inclined and have guide grooves inside. The first pin is movably installed in the guide grooves. The second mounting block is fixedly connected to the top of the guide plates. The top of the mounting frame has annularly distributed mounting grooves. The second pin is fixedly connected in the mounting grooves. The second mounting block is rotatably connected to the second pin. The expanding blade is fixedly connected to the outer wall of the second mounting block. The driving member is used to drive the first pin to move in the guide grooves, so as to drive the second mounting block to rotate around the second pin, thereby changing the expanding blade from a closed state to an open state.

[0013] Furthermore, the overall circumferential diameter of the enlarged blade when it is opened to a horizontal state is greater than the distance between the two anchor rods.

[0014] Furthermore, the outer wall of the auger drill bit is provided with spirally distributed guide grooves.

[0015] The second aspect: In order to achieve the construction method described in the first aspect above, the following steps are included:

[0016] S1. Level and compact the slope surface, and then lay precast concrete blocks from bottom to top, so that adjacent precast concrete blocks are interlocked and connected by the slope protection plate on their outer side to form a complete slope protection surface layer.

[0017] S2. Place the installation sleeve into the installation hole of the precast concrete block, and pass the grouting pipe with the auger bit and enlarged grouting assembly through the installation sleeve. The threaded part on the pipe passes upward through the multi-functional grouting drilling machine and connects to it. The multi-functional grouting drilling machine drives the grouting pipe, the enlarged grouting assembly and the auger bit to rotate and drill downward together. At this time, the hole enlarging blade is in a downward retracted state, and the top of the grouting pipe is connected to the delivery pipeline of the external grouting pump.

[0018] S3; After drilling to the target depth, the multi-functional grouting drill drives the grouting pipe to reverse and lift. During this process, the driving component moves, and its piston rod pushes the positioning ring to move upward, which drives the first pin to move in the guide groove of the guide plate, forcing the guide plate and the mounting block 2 fixed thereto to rotate around the second pin, thereby driving the hole-expanding blade to gradually open to a horizontal state during rotation.

[0019] Simultaneously, the external grouting pump's delivery pipeline pressurizes grout into the grouting pipe. The grout flows out from the outlet hole to fill the cavity enlarged by the expanding blades. Once the grouting volume reaches the design value, the expanding blades are controlled to retract to a closed state. Finally, the auger drill bit, the enlarged grouting assembly, and the grouting pipe are removed together from the installation casing and precast concrete block.

[0020] S4. After the mud in the hole is poured, the anchor rod is passed through the precast concrete block and inserted into the cement grout anchor body until the design position is reached to form an anchoring system.

[0021] Compared with existing technologies, this invention provides a prefabricated self-locking permeable slope protection system with a grouting anchoring system and its construction method. This slope protection structure effectively overcomes the inherent defect of insufficient anchoring force in backfilled loose soil slopes by integrating an innovative grouting anchoring system into traditional self-locking block slope protection structures. Specifically, through the coordinated operation of a spiral drill bit and an expandable borehole blade, a stable reinforcement layer composed of cement grout and soil can be formed in the soil beneath the slope surface. Combined with the implantation of anchor bolts, a reliable connection between the slope protection structure and the deep stable soil is achieved, thereby improving the overall integrity and anti-sliding stability of the slope protection system.

[0022] Meanwhile, the core construction components of this anchoring system, such as the auger drill bit, enlarged grouting assembly, and grouting pipe, can be removed from the precast concrete block after grouting and reused for the construction of subsequent blocks. This design not only ensures the forming quality of the anchor body but also significantly reduces the material cost of a single slope protection point, achieving efficient recycling of specialized tools. This technology ensures excellent anchoring effect while also being economical and efficient in construction, making it particularly suitable for loose soil slope protection projects with high stability requirements. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0024] Figure 1 This is a schematic diagram of the prefabricated self-locking permeable slope protection structure with grouting anchoring system provided in an embodiment of the present invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the precast concrete block component structure provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the precast concrete block and slope protection slab components provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the precast concrete block component structure provided in an embodiment of the present invention;

[0028] Figure 5 Cross-sectional view of the internal component structure of the mounting frame provided in the embodiment of the present invention. Figure 1 ;

[0029] Figure 6 Cross-sectional view of the internal component structure of the mounting frame provided in the embodiment of the present invention. Figure 1 two;

[0030] Figure 7 This is a schematic diagram of the structure of the expanded-hole blade in its contracted state, as provided in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Precast concrete block; 2. Slope protection slab; 201. Plain slab section; 202. Dovetail tenon; 3. Installation sleeve; 4. Anchor bolt; 5. Grouting pipe; 6. Spiral drill bit; 7. Guide channel; 8. Installation groove; 9. Dovetail groove; 10. Installation hole; 11. Grout outlet hole; 12. Threaded part; 13. Installation frame; 14. Positioning ring; 15. Drive component; 16. Installation block one; 17. First pin; 18. Installation block two; 19. Guide plate; 20. Hole enlarging blade; 21. Guide groove; 22. Second pin. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0034] As attached Figure 1 To be continued Figure 7 As shown:

[0035] Example:

[0036] This invention provides a prefabricated self-locking permeable slope protection system with grouting anchoring system, comprising multiple precast concrete blocks 1 laid on the slope surface, each precast concrete block 1 having a ring-shaped slope protection plate 2 on its outer side wall, adjacent precast concrete blocks 1 being interlocked with each other through the slope protection plate 2 to form a slope protection structure, and the precast concrete blocks 1 being provided with an anchoring system inserted into the ground:

[0037] The anchoring system includes an installation sleeve 3 that is movably inserted into the precast concrete block 1, an anchor rod 4 that passes through the precast concrete block 1, a grouting pipe 5 that passes through the installation sleeve 3 and has annularly distributed grout outlet holes 11 on its wall, an enlarged grouting assembly fixed to the bottom of the installation sleeve 3, and a spiral drill bit 6 located at the bottom of the enlarged grouting assembly.

[0038] It should be noted that the innovative grouting and anchoring system integrated into the traditional self-locking block slope protection structure effectively overcomes the inherent defect of insufficient anchoring force in loose soil slopes. Specifically, through the coordinated operation of the auger bit 6 and the expandable borehole blade 20, a stable reinforcement layer composed of cement grout and soil can be formed in the soil beneath the slope. Combined with the implantation of the anchor bolt 4, a reliable connection between the slope protection structure and the deep stable soil is achieved, thereby improving the overall integrity and anti-sliding stability of the slope protection system.

[0039] Meanwhile, the core construction components of the anchoring system, such as the auger bit 6, the enlarged grouting assembly, and the grouting pipe 5, can be removed from the precast concrete block 1 after grouting is completed and reused for the construction of subsequent blocks. This design not only ensures the forming quality of the anchor body, but also significantly reduces the material cost of a single slope protection point and realizes the efficient recycling of special tools. This technology ensures excellent anchoring effect while also having good economy and construction efficiency, and is especially suitable for loose soil slope protection projects with high stability requirements.

[0040] In this embodiment: the cross-section of the precast concrete block 1 is polygonal, and each precast concrete block 1 has a ring-shaped distribution of dovetail grooves 9 on its outer side wall. The number of dovetail grooves 9 is not less than four. The slope protection plate 2 is integrally formed by precast concrete. The slope protection plate 2 is composed of a middle smooth plate section 201 and two dovetail tenons 202 at both ends. The dovetail tenons 202 and the dovetail grooves 9 interlock with each other.

[0041] It should be noted that the polygonal blocks, combined with the ring-shaped dovetail grooves 9 and the slope protection plate 2, allow for multi-directional interlocking between any adjacent blocks via dovetail tenons 202, forming a tight, interlocking mesh structure. This structure effectively distributes the slope load evenly, avoiding localized stress concentration and enhancing the overall integrity and coordinated deformation capacity of the slope protection layer. Simultaneously, the gaps between the slope protection plates 2 form natural drainage channels, ensuring the permeability of the slope protection system and contributing to slope stability.

[0042] In this embodiment: a vertical mounting hole 10 is provided at the center of the precast concrete block 1. The vertical cross-sectional profile of the mounting hole 10 is an inverted convex shape. The mounting sleeve 3 is a high-density polyethylene pipe or a galvanized steel pipe. The mounting sleeve 3 cooperates with the mounting hole 10.

[0043] It should be noted that the inverted convex mounting hole 10, in conjunction with the mounting sleeve 3, forms a reliable anti-detachment structure. This design allows the mounting sleeve 3 to be accurately positioned during construction and to withstand upward pull-out forces. Furthermore, after grouting and anchoring, the resulting channel provides precise guidance for the installation of the anchor rod 4, ensuring its verticality. Using high-density polyethylene pipe or galvanized steel pipe balances corrosion resistance and structural strength, respectively, adapting to different engineering environments and durability requirements.

[0044] In this embodiment: the grout outlet 11 is configured in at least two layers on the grouting pipe 5, and the outer wall of the grouting pipe 5 is provided with a vertical threaded portion 12.

[0045] It should be noted that the layered grout outlet 11 ensures that the cement grout can be filled in a three-dimensional and uniform manner in the enlarged cavity. No matter what depth the enlarged blade 20 is open, the grout can overflow from the nearest upper and lower grout outlet 11, effectively avoiding the grouting blind spots or incomplete filling that are easily caused by a single grout outlet.

[0046] Specifically: To achieve the rotation, vertical feeding, and synchronous grouting functions of the grouting pipe 5 in this invention, a multi-functional grouting drilling rig widely used in anchoring projects and geological drilling is employed. Its core component is the power head, and its specific connection and operation are as follows:

[0047] 1. Connection method

[0048] Interface matching: The threaded part 12 at the top of the grouting pipe 5 is designed to be directly screwed into the internal thread of the hollow clamp (or hydraulic chuck) of the drilling rig power head, or connected through a standard drill pipe adapter, to ensure a firm and reliable connection.

[0049] Grout channel connection: The rotating main shaft of the power head is a hollow structure. After the grouting pipe 5 passes upward through this hollow main shaft, its top end is connected to the delivery hose of the external high-pressure grouting pump through a high-pressure rotary joint.

[0050] Key component: High-pressure rotary joint: This component is installed on the top of the power head. Its core function is to ensure that the grout flows continuously, in a sealed and leak-free manner from the stationary delivery hose into the rotating grout pipe 5 while the power head drives the grout pipe 5 to rotate at high speed, thus realizing the combination of "dynamic rotation" and "static grout supply".

[0051] 2. Mechanism for implementing rotation and vertical movement

[0052] Rotational motion: The power head of the drilling rig is equipped with a hydraulic motor or a high-power motor. After startup, the motor drives the hollow spindle to rotate, and through the pre-connected threaded part 12, the torque is directly transmitted to the grouting pipe 5, thereby driving the auger drill bit 6 at its lower end and the enlarged grouting assembly to rotate together. This rotational function is used to mix the soil during drilling and borehole enlargement.

[0053] Up and down (feed) movement: The entire power head is mounted on the feed carriage of the drill frame.

[0054] Feeding power: Usually provided by a pair of feed cylinders. The extension and retraction of the cylinders directly drive the power head and the grouting pipe 5 it holds to rise or fall as a whole along the drill frame guide rail.

[0055] Control method: The operator controls the pressure and flow of the feed cylinder through the hydraulic valve at the control console, thereby precisely controlling the drilling speed, pressure and lifting speed of the grouting pipe 5.

[0056] In this embodiment: the anchor rod 4 vertically penetrates the precast concrete block 1, and the number of anchor rods 4 on the precast concrete block 1 is not less than two.

[0057] It should be noted that installing at least two anchor rods (4) vertically penetrating the block constitutes a stable multi-point anchoring system. This arrangement firmly "nails" the slope protection surface layer to the base layer, providing not only strong pull-out resistance but also effectively resisting the shear force generated when the shallow soil of the slope slides, preventing the slope protection structure from overturning or sliding horizontally, and significantly improving the safety redundancy of the slope protection system.

[0058] In this embodiment: the enlarged grouting assembly includes an installation frame 13, a positioning ring 14, a driving component 15, a first mounting block 16, a first pin 17, a second pin 22, a second mounting block 18, a guide plate 19, and an enlarging blade 20. The installation frame 13 is hollow inside. The driving component 15 is fixedly installed inside the installation frame 13. The positioning ring 14 is fixedly connected to the piston rod end of the driving component 15. The first mounting blocks 16 are arranged in pairs, and multiple pairs of first mounting blocks 16 are distributed annularly at intervals along the outer wall of the positioning ring 14.

[0059] It should be noted that this component achieves controllable switching of the working state of the reaming blade 20 through a precise mechanical linkage mechanism. The drive unit 15, acting as the power source, pushes the positioning ring 14, converting linear motion via the first pin 17 and guide groove 21 into rotational motion of the mounting block 18, ultimately driving the reaming blade 20 to open around the second pin 22. This design allows the reaming blade 20 to reliably expand to a predetermined diameter at a designated position within a narrow borehole, thereby precisely cutting the soil to form an enlarged head cavity, laying a solid foundation for the subsequent formation of a high-strength anchor body.

[0060] The drive component 15 is a hydraulic cylinder, pneumatic cylinder, or electric actuator. The drive component 15 is connected to a ground-based control system via a hydraulic hose or cable, and the extension and retraction of its piston rod is controlled by the control system.

[0061] To further achieve precise and intelligent control of the 20° opening angle of the orifice-expanding blades, this invention introduces an electro-hydraulic proportional control system. This system mainly includes: a handheld control handle, an electro-hydraulic proportional valve, and connecting cables. The electro-hydraulic proportional valve is installed on the hydraulic or pneumatic pipeline of the drive component 15.

[0062] Its working principle is as follows: The operator operates a handheld control handle on the ground, which generates a voltage control signal proportional to the amplitude of the operation. This signal is transmitted to the electro-hydraulic proportional valve via a cable. The proportional valve steplessly adjusts the flow rate of hydraulic oil or compressed air entering the rodless chamber of the drive component 15 according to the received signal magnitude, thereby precisely controlling the extension speed and stroke of the piston rod of the drive component 15. Since the stroke of the piston rod is linearly converted into the rotation angle of the reaming blade 20 around the second pin 22 through the linkage mechanism formed by the positioning ring 14, the first pin 17, and the inclined guide groove 21 on the guide plate 19, the opening angle of the reaming blade 20 can be remotely, in real time, and continuously controlled by the handheld control handle until it reaches the preset optimal working state or is dynamically adjusted according to the formation conditions.

[0063] Preferably, a displacement sensor can be integrated into the drive unit 15 to provide real-time feedback on the actual stroke of the piston rod and compare it with the target signal set by the handle, forming a closed-loop control that makes angle control more precise and stable. This control system allows construction workers to intuitively and flexibly operate the borehole reaming tool several meters underground, just like operating the boom of construction machinery, improving construction quality, safety, and adaptability to complex geological conditions.

[0064] In this embodiment: the first pin 17 is rotatably connected between the two mounting blocks 16 of each pair; the guide plate 19 is inclined and has a guide groove 21 inside; the first pin 17 is movably installed in the guide groove 21; the second mounting block 18 is fixedly connected to the top of the guide plate 19; the top of the mounting frame 13 has an annularly distributed mounting groove 8; the second pin 22 is fixedly connected in the mounting groove 8; the second mounting block 18 is rotatably connected to the second pin 22; the expanding blade 20 is fixedly connected to the outer wall of the second mounting block 18; the driving member 15 is used to drive the first pin 17 to move in the guide groove 21, so as to drive the second mounting block 18 to rotate around the second pin 22, thereby changing the expanding blade 20 from a closed state to an open state.

[0065] It should be noted that this linkage mechanism is the core of the blade opening and closing action. The inclined guide plate 19 and its internal guide groove 21 constitute a reliable motion trajectory controller. When the first pin 17 moves along the guide groove 21 under the action of the drive member 15, the inclined groove wall forces the guide plate 19 to rotate around the second pin 22, thereby efficiently converting the vertical lifting motion into the horizontal opening motion of the reaming blade 20. This purely mechanical transmission method has a stable structure and precise action, ensuring the reliability of the reaming action in complex underground environments.

[0066] In this embodiment, the overall circumferential diameter of the enlarged blade 20 when it is opened to a horizontal state is greater than the distance between the two anchor rods 4.

[0067] It should be noted that this dimensional design ensures that the final enlarged head cement anchor body can completely cover and enclose the two anchor rods 4 on the horizontal projection plane. This allows the anchor rod group 4 and the enlarged head anchor body to form a highly integrated anchoring foundation, increasing the contact area between the anchor body and the soil and the pull-out resistance, thereby maximizing the anchoring force and effectively avoiding the risk of the anchor rods 4 being pulled out of the anchor body.

[0068] As a further optimization of the enlarged blade 20, to improve its cutting efficiency and adaptability to working conditions:

[0069] Preferably, a plurality of carbide pre-drill teeth are provided on the top edge of the reaming blade 20. When the reaming blade 20 is in the retracted state, the tips of the pre-drill teeth protrude slightly beyond the blade outline;

[0070] When the reaming blade 20 begins to open, the leading drill tooth first contacts and breaks the soil, forming a pre-guide groove for the subsequent cutting of the main blade, thereby significantly reducing the reaming starting torque and ensuring the regular shape of the reaming head cavity.

[0071] Preferably, the radial cross-section of the expanded blade 20 is an inwardly concave arc shape, and the outer circumferential edge formed after unfolding is machined with a sharp cutting edge, on which a hard alloy wear-resistant layer can be welded. The design of the arc-shaped concave surface and the cutting edge enables the blade to efficiently cut rather than crush the soil during the rotation and lifting process.

[0072] Preferably, the working surface of the reaming blade 20 is treated with a low surface energy anti-stick coating or an ultra-hard wear-resistant coating. This treatment can effectively reduce the adhesion of soil to the blade surface during construction in cohesive soil layers, keep the blade clean, ensure stable resistance during the reaming process, and facilitate the smooth retraction of the blade after grouting.

[0073] In this embodiment: the outer wall of the spiral drill bit 6 is provided with spirally distributed guide grooves 7.

[0074] It should be noted that the spirally distributed guide channels 7 play two key roles during drilling: first, as a chip removal channel, they efficiently transport the cut soil to the outside of the hole, keeping the area in front of the drill bit clean, preventing blockage, and ensuring drilling efficiency; second, during grouting, these channels can serve as auxiliary flow paths for the grout, promoting the penetration and uniform distribution of the grout around the hole wall, and to a certain extent improving the bonding performance between the anchor body and the original soil.

[0075] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An assembled self-locking permeable slope protection with grouting anchoring system, comprising a plurality of precast concrete blocks (1) laid on the slope surface, each precast concrete block (1) being provided with annularly distributed slope protection plates (2) on the outer side wall, adjacent precast concrete blocks (1) being connected to each other by the slope protection plates (2) to form a slope protection structure, and the precast concrete block (1) being provided with an anchoring system inserted into the ground, characterized in that: the anchoring system comprises a mounting sleeve (3) movably inserted into the precast concrete block (1), an anchor rod (4) penetrating through the precast concrete block (1), a grouting pipe (5) penetrating through the mounting sleeve (3) and being provided with annularly distributed grouting holes (11) on the pipe wall, an enlarged grouting assembly fixed at the bottom of the mounting sleeve (3), and a spiral drill bit (6) arranged at the bottom of the enlarged grouting assembly. The cross section of the precast concrete block (1) is polygonal, each precast concrete block (1) is provided with annularly distributed dovetail grooves (9) on the outer side wall, the number of the dovetail grooves (9) is not less than four, the slope protection plate (2) is integrally processed and formed by precast concrete, the slope protection plate (2) is composed of a middle light plate section (201) and two dovetail tenons (202) at both ends, and the dovetail tenons (202) are engaged with the dovetail grooves (9).

2. The assembled self-locking water-permeable revetment with a grouting anchoring system according to claim 1, characterized in that, A vertical mounting hole (10) is arranged at the center position of the precast concrete block (1), the vertical cross section profile of the mounting hole (10) is inverted convex, the mounting sleeve (3) is a high-density polyethylene pipe or a galvanized steel pipe, and the mounting sleeve (3) is matched with the mounting hole (10).

3. The assembled self-locking water-permeable revetment with a grouting anchoring system according to claim 1, characterized in that, The grouting holes (11) are arranged in at least two layers on the grouting pipe (5), and the outer wall of the grouting pipe (5) is provided with a vertical threaded portion (12).

4. The assembled self-locking water-permeable revetment with a grouting anchoring system according to claim 3, characterized in that, The anchor rod (4) vertically penetrates through the precast concrete block (1), and the number of the anchor rods (4) arranged on the precast concrete block (1) is not less than two.

5. The assembled self-locking water-permeable revetment with a grouting anchoring system according to claim 1, characterized in that, The enlarged grouting assembly comprises a mounting frame (13), a positioning ring (14), a driving member (15), a mounting block one (16), a first pin shaft (17), a second pin shaft (22), a mounting block two (18), a guide plate (19), and an expansion blade (20), the inside of the mounting frame (13) is hollow, the driving member (15) is fixedly installed in the inside of the mounting frame (13), the positioning ring (14) is fixedly connected to the piston rod end of the driving member (15), the mounting block one (16) is arranged in pairs, and multiple pairs of the mounting block one (16) are annularly and interval ly distributed along the outer wall of the positioning ring (14).

6. The assembled self-locking water-permeable revetment with a grouting anchoring system according to claim 1, characterized in that, ​ 7. The assembled self-locking water-permeable revetment with a grouting anchoring system according to claim 6, characterized in that, The first pin shaft (17) is rotatably connected between the two mounting blocks (16) of each pair, the guide plate (19) is inclined, the guide groove (21) is arranged in the guide plate (19), the first pin shaft (17) is movably arranged in the guide groove (21), the mounting block (18) is fixedly connected to the top of the guide plate (19), the top of the mounting frame (13) is provided with the annular mounting groove (8), the second pin shaft (22) is fixedly connected in the mounting groove (8), the mounting block (18) is rotatably connected to the second pin shaft (22), the reaming blade (20) is fixedly connected to the outer side wall of the mounting block (18), and the driving member (15) is used for driving the first pin shaft (17) to move in the guide groove (21) to drive the mounting block (18) to rotate around the second pin shaft (22), so that the reaming blade (20) changes from the closed state to the open state.

8. The assembled self-locking water-permeable revetment with a grouting anchoring system according to claim 1, characterized in that, When the reaming blade (20) is opened to the horizontal state, the overall circumferential diameter is greater than the distance between the two anchor rods (4).

9. The assembled self-locking water-permeable revetment with a grouting anchoring system according to claim 1, characterized in that, The outer wall of the auger bit (6) is provided with the spiral flow guide groove (7).

10. The construction method of the fabricated self-locking permeable revetment with the grouting anchoring system according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S1, the slope surface is flattened and compacted, and then the prefabricated concrete blocks (1) are laid from bottom to top, so that the adjacent prefabricated concrete blocks (1) are connected with each other through the slope protection plates (2) on the outer sides to form a complete slope protection surface layer; S2, the installation sleeve (3) is placed in the installation hole (10) of the prefabricated concrete block (1), the grouting pipe (5) assembled with the auger bit (6) and the enlarged grouting assembly is passed through the installation sleeve (3), the threaded part (12) on the grouting pipe (5) is upwardly connected with the multifunctional grouting drilling machine, the multifunctional grouting drilling machine drives the grouting pipe (5), the enlarged grouting assembly and the auger bit (6) to rotate and drill down together, at this time, the reaming blade (20) is in the downwardly folded state, and the top of the grouting pipe (5) is connected with the delivery pipeline of the external grouting pump; S3, after drilling to the target depth, the multifunctional grouting drilling machine drives the grouting pipe (5) to reverse and lift, in the process, the driving member (15) acts, the piston rod pushes the positioning ring (14) to move upward, drives the first pin shaft (17) to move in the guide groove (21) of the guide plate (19), forces the guide plate (19) and the mounting block (18) fixedly connected thereto to rotate around the second pin shaft (22), so as to drive the reaming blade (20) to gradually open to the horizontal state in rotation; At the same time, the delivery pipeline of the external grouting pump pressurizes the mud into the grouting pipe (5), the mud flows out of the grouting hole (11) to fill the cavity expanded by the reaming blade (20), after the grouting amount reaches the design value, the reaming blade (20) is controlled to shrink to the folded state, finally, the auger bit (6), the enlarged grouting assembly and the grouting pipe (5) are taken out from the installation sleeve (3) and the prefabricated concrete block (1) together; S4, after the hole mud pouring is completed, the anchor rod (4) is inserted into the cement mortar anchoring body through the prefabricated concrete block (1) until the design position, forming an anchoring system.

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