A water-permeable anchor rod structure for slope support

Abstract

The utility model discloses a water -permeable anchor rod structure for side slope support, including the conical anchor head, water -permeable anchor body and tail anchorage component of head -tail connection in proper order, water -permeable anchor body is connected in the end of conical anchor head near one end of conical anchor head, water -permemeble anchor body includes at least one section membrane bag steel pipe and steel flower pipe body and the elastic membrane bag of elastic sleeve in membrane bag steel pipe outer surface, one end of membrane bag steel pipe is connected with conical anchor head, and the other end is connected with steel flower pipe body, and the lumen inner diameter of steel flower pipe body and membrane bag steel pipe is equal, and the lumen is filled with water -permeable mortar, and the elastic membrane bag is the annular bag of both ends of closing, and both ends of elastic membrane bag are fixed on the both sides outer circumference of membrane bag steel pipe, and the end of elastic membrane bag is provided with one -way channel grouting mouth, and one -way channel grouting mouth is circumscribed membrane bag grouting pipe. Water -permeable anchor rod realizes efficient drainage to reduce groundwater level, and also promotes the pullout capacity through membrane bag grouting, and solves the side slope stability problem under the complex working condition such as reservoir area water level fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical anchoring engineering technology, and in particular to a permeable anchor structure for slope support. Background Technology

[0002] Currently, commonly used anchoring and drainage measures in slope protection are mainly divided into two categories: one is a separate anchoring and drainage structure, which uses anchors to reinforce the slope and combines them with slope drainage ditches, underground drainage blind ditches, or sump pits to achieve drainage. However, this type of structure suffers from problems such as easy blockage of drainage channels, high construction difficulty, high cost, and the inability of anchoring and drainage to work synergistically. The other type is an integrated anchor for anchoring and drainage, such as an anchor structure that utilizes gravity drainage or siphon drainage. Although it achieves functional integration, it still has obvious defects under complex working conditions. For example, some integrated anchors can only drain surface water and cannot effectively drain deep water in the slope, and their pull-out bearing capacity is insufficient. In scenarios where reservoir water levels fluctuate frequently, existing anchors cannot adapt well to the fluctuations in soil mechanical properties caused by water level changes, and are prone to anchoring failure or poor drainage. At the same time, some anchor structures are complex, difficult to prefabricate, and have cumbersome construction processes, which are not conducive to the promotion and application of engineering projects. Finally, the overall support effect and service life of existing permeable anchors are limited.

[0003] Therefore, there is an urgent need for a permeable anchor structure for slope support that can take into account efficient drainage, high tensile strength, adaptability to complex water level changes, and is easy to prefabricate and construct. Utility Model Content

[0004] In view of this, in order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a permeable anchor structure for slope support, so as to solve the technical problems such as poor slope stability in reservoir water level fluctuations, abundant groundwater and heavy rainfall areas, poor drainage effect of existing anchors, insufficient pull-out bearing capacity, and complex construction.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A permeable anchor structure for slope protection includes a conical anchor head, a permeable anchor body, and a tail anchoring component connected sequentially from end to end, wherein one end of the permeable anchor body near the conical anchor head is connected to the end of the conical anchor head.

[0007] The permeable anchor body includes at least one section of membrane bag steel pipe and steel flower pipe body, as well as an elastic membrane bag elastically fitted on the outer surface of the membrane bag steel pipe. One end of the membrane bag steel pipe is connected to the conical anchor head, and the other end is connected to the steel flower pipe body. The inner diameter of the steel flower pipe body and the membrane bag steel pipe are equal, and the cavities of the steel flower pipe body and the membrane bag steel pipe are filled with permeable mortar.

[0008] The elastic membrane bag is an annular bag with closed ends. The diameter of the two ends of the elastic membrane bag is smaller than the outer diameter of the membrane bag steel pipe. The two ends of the elastic membrane bag are fixed on the outer circumference of the two sides of the membrane bag steel pipe. The end of the elastic membrane bag is provided with a one-way channel grouting port. The one-way channel grouting port is connected to the membrane bag grouting pipe. The end of the membrane bag grouting pipe away from the one-way channel grouting port extends through the interior of the permeable anchor body and passes through the tail anchoring component.

[0009] Preferably, there are two of each of the membrane bag steel pipe and the steel flower tube body, and the membrane bag steel pipe and the steel flower tube body are coaxially spaced apart from each other. The two ends of the membrane bag steel pipe extend 30cm-50cm beyond the elastic membrane bag, and the membrane bag steel pipe and the steel flower tube body are threaded together.

[0010] Preferably, the tail anchoring component includes an anchor plate disposed at the end of the steel flower tube body away from the membrane bag steel pipe and a nut anchored to the outer end of the steel flower tube body and the anchor plate.

[0011] Preferably, the steel flower tube body is configured as a hollow flower tube structure, and the surface of the steel flower tube body is provided with uniformly distributed permeable holes in a plum blossom pattern, the diameter of the permeable holes being 8mm-12mm.

[0012] Preferably, the length of the elastic membrane bag is 40-50cm, the initial diameter of the elastic membrane bag is equal to the outer diameter of the steel flower tube, and the outer diameter of the elastic membrane bag after expansion is 30-50cm.

[0013] Preferably, the outer wall of the steel pipe body near the adjacent elastic membrane bag is provided with a grouting pipe orifice. The portion of the membrane bag grouting pipe located in the inner cavity of the steel pipe body passes through the grouting pipe orifice and connects with the one-way channel grouting port. A check valve is also provided at the one-way channel grouting port.

[0014] Preferably, the membrane bag grouting pipe includes a horizontal grouting pipe and a vertical grouting pipe. The vertical grouting pipe is threaded to the end of the horizontal grouting pipe after being inserted into the grouting pipe orifice. At least one lifting ring is provided inside the cavity of the steel flower pipe body. The lifting ring is used to support and fix the horizontal grouting pipe.

[0015] Preferably, the outer surface of the membrane bag steel pipe along the length of the elastic membrane bag is provided with a deep spiral rib structure, and the two ends of the elastic membrane bag are fixed to the two ends of the deep spiral rib structure of the membrane bag steel pipe by iron wire.

[0016] Preferably, the anchor plate has a thickness of 15-20mm, a length of 200-300mm, a width of 200-300mm, and a mounting hole adapted to the steel pipe body is provided in the center of the anchor plate.

[0017] Preferably, the spacing between adjacent elastic film bags is 1.5m-2.5m.

[0018] Compared with the prior art, this utility model has significant advantages and beneficial effects, specifically reflected in the following aspects:

[0019] 1. This utility model utilizes a hollow steel pipe with permeable holes arranged in a quincunx pattern, filled with high-porosity permeable mortar. This allows for rapid drainage of soil moisture along the steel pipe, effectively lowering the groundwater level and significantly improving slope stability. It is particularly suitable for reservoir areas with fluctuating water levels, abundant groundwater, and areas experiencing heavy rainfall, solving the problems of low drainage efficiency and difficulty in removing deep water from existing anchor bolts. An elastic membrane bag is fitted around the steel pipe, forming an expanded cement body after grouting, significantly increasing the pull-out resistance of the anchor bolt. Simultaneously, the expanded elastic membrane bag adheres tightly to the borehole wall, further enhancing the anchoring effect and addressing the issue of insufficient pull-out resistance in existing anchor bolts. The steel pipe body adopts a segmented threaded connection structure, and the membrane bag steel pipe is also connected to the steel pipe body by threads. The anchor head is connected to the steel pipe body by threads. The entire anchor structure is easy to prefabricate and assemble, the construction process is simple, the transportation and construction difficulty is reduced, and the construction efficiency is improved. The high porosity permeable mortar filled in the steel pipe body not only ensures water permeability, but also effectively improves the local stability of the steel pipe body, prevents the steel pipe body from bending and deforming, and extends the service life of the anchor. The one-piece molded deep spiral rib structure on the surface of the membrane bag steel pipe enhances the interlocking force with the grout, and the check valve design of the one-way channel grouting port ensures the grouting quality. The overall structure has high reliability.

[0020] 2. The number and spacing of the elastic membrane bags can be flexibly adjusted according to actual engineering needs, adapting to different geological conditions and bearing capacity requirements. It has a wide range of applications, and in particular, it can well adapt to the fluctuations in slope mechanical properties caused by frequent rises and falls in reservoir water levels, solving the problem of slope stability under complex working conditions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the permeable anchor bolt structure used for slope support in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the segmented structure of the permeable anchor structure used for slope support in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the conical anchor head in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the elevation structure of the steel flower pipe and the membrane bag grouting pipe in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the connection structure between the elastic membrane bag and the steel flower tube in an embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the elevation structure of the steel flower pipe and the membrane bag grouting pipe located at the lifting ring in an embodiment of this utility model.

[0027] Explanation of reference numerals in the attached figures

[0028] 1- Conical anchor head;

[0029] 2-Steel pipe body; 21-First external threaded joint; 22-First internal threaded joint; 23-Grouting pipe orifice; 24-Plug; 25-Water-permeable hole;

[0030] 3-Elastic membrane bag; 31-One-way channel grouting port; 32-Check valve; 33-Membrane bag grouting pipe; 34-Deep spiral rib structure;

[0031] 4- Membrane bag steel pipe; 41- Second external threaded connector; 42- Second internal threaded connector;

[0032] 5-Anchor plate; 51-Mounting hole;

[0033] 6-nut;

[0034] 7-Hanging rings;

[0035] 8-Permeable mortar;

[0036] 9-Sealing gasket. Detailed Implementation

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0038] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] like Figures 1 to 6 As shown, this utility model embodiment provides a permeable anchor structure for slope support. The permeable anchor structure includes a conical anchor head 1, a permeable anchor body, and a tail anchoring component connected sequentially from end to end, wherein:

[0043] The conical anchor head 1 has a conical cap structure, which facilitates the insertion of the anchor rod into the borehole; the end of the permeable anchor body near the conical anchor head is connected to the end of the conical anchor head 1; the permeable anchor body includes at least one section of membrane bag steel pipe 4, steel flower pipe body 2, and elastic membrane bag 3. The elastic membrane bag 3 is elastically fitted on the outer surface of the membrane bag steel pipe 4. One end of the membrane bag steel pipe 4 is connected to the conical anchor head 1, and the other end is connected to the steel flower pipe body 2. The inner diameter of the cavity of the steel flower pipe body 2 and the membrane bag steel pipe 4 is equal, and the cavity of the steel flower pipe body 2 and the membrane bag steel pipe 4 is filled with permeable mortar 8.

[0044] The elastic membrane bag 3 is an annular bag with closed ends. The diameter of the two ends of the elastic membrane bag 3 is smaller than the outer diameter of the membrane bag steel pipe 4. The two ends of the elastic membrane bag 3 are fixed on the outer circumference of the membrane bag steel pipe 4 on both sides. The end of the elastic membrane bag 3 is provided with a one-way channel grouting port 31. The one-way channel grouting port 31 is connected to the membrane bag grouting pipe 33. The end of the membrane bag grouting pipe 33 away from the one-way channel grouting port 31 extends through the interior of the permeable anchor body and passes through the tail anchoring component.

[0045] Specifically, the elastic membrane bag 3 expands after grouting via the grouting pipe 33, forming an enlarged head that increases the contact area with the soil and rock mass. Simultaneously, it compacts the surrounding soil, enhancing pull-out resistance through the end-bearing effect. The steel perforated pipe body 2 and the permeable mortar 8 work together to form a rigid-flexible coupling system, further enhancing anchoring reliability. Furthermore, the steel perforated pipe body 2, filled with permeable mortar 8, also functions as a seepage channel, quickly draining moisture from the slope. The elastic membrane bag 3 is sealed to the conical anchor head 1, reducing the softening and disintegration of the soil and rock mass caused by rainwater infiltration, thus lowering the risk of slope instability. The conical anchor head 1 makes it easier to insert the anchor rod into the borehole, simplifying the construction process. The elastic membrane bag 3 achieves pressure grouting through a unidirectional grouting pipe, resulting in high grout utilization and adaptability to different geological conditions, especially suitable for fractured rock masses and loose strata. Compared to traditional anchor rods that typically only anchor or drain, this structure simultaneously achieves anchoring, reinforcement, and drainage, eliminating the need for additional drainage components.

[0046] In this embodiment, the steel pipe body 2 is filled with permeable mortar 8 with a porosity of 30%. 6% permeable agent is added to the permeable mortar 8 to ensure good permeability and improve the local stability of the steel pipe body 2, preventing bending.

[0047] It should be noted that the porosity of the permeable mortar 8 is >8%, the strength is not lower than M10, the cement used is PO 42.5 ordinary Portland cement, and the ratio of cement:sand:water is 1:1.5~2.0:0.40~0.45, with about 5% silica fume and 0.3% water-reducing agent.

[0048] The grouting material mortar in the elastic membrane bag 3 is preferably M30-M40 in strength, with a cement to water weight ratio of 1:0.35 to 0.42 and a cement to medium sand weight ratio of 1:1 to 1.5. The cement is P.O42.5 ordinary Portland cement with a strength ≥42.5MPa, and the sand is medium-fine sand with a particle size of less than 2.5mm.

[0049] Specifically, please refer to Figure 1 , Figure 2 As shown, in one embodiment of this utility model, there are two membrane bag steel pipes 4 and two steel flower tube bodies 2, and the membrane bag steel pipes 4 and the steel flower tube bodies 2 are coaxially spaced apart from each other. The length of each end of the membrane bag steel pipe 4 extending out of the elastic membrane bag 3 is 30cm-50cm, and the membrane bag steel pipe 4 and the steel flower tube body 2 are threaded together to ensure the integrity of the structure.

[0050] In this embodiment, the preferred number of elastic membrane bags 3 is two, arranged at 2m intervals along the axial direction of the membrane bag steel pipe 4. The outer diameter of the expanded elastic membrane bag 3 is not less than twice the outer diameter of the membrane bag steel pipe 4 to ensure a tight fit with the borehole wall. A first external threaded connector 21 and a first internal threaded connector 22 are respectively provided at both ends of the steel flower pipe body 2. A second external threaded connector 41 and a second internal threaded connector 42 are respectively provided at both ends of the membrane bag steel pipe 4. The first external threaded connector 21 and the second internal threaded connector 42 are connected to connect the steel flower pipe body 2 and the membrane bag steel pipe 4. The first internal threaded connector 22 and the second external threaded connector 41 are connected to connect another membrane bag steel pipe 4 at the other end of the steel flower pipe body 2.

[0051] In addition, to ensure the sealing of the threaded connection, a sealing gasket 9 is also provided at the threaded connection between the membrane bag steel pipe 4 and the steel flower pipe body 2.

[0052] In this embodiment, based on the length of the anchor rod 1, a double-set membrane bag steel pipe 4 and a double-set steel flower pipe body 2 are arranged coaxially at intervals. After grouting, the elastic membrane bag 3 expands to form a multi-stage enlarged head anchoring structure. Compared with a single-stage enlarged head, it can form a multi-point, segmented interlocking and compaction effect with the rock and soil, dispersing the stress on the anchor rod and avoiding anchoring failure caused by local stress concentration. At the same time, after the steel flower pipe body 2 and the membrane bag steel pipe 4 are filled with permeable mortar 8, a rigid support is formed, improving the stability of the anchor body structure. The flexible anchoring sections of the steel flower pipe body 2 and the elastic membrane bag 3 are used alternately to adapt to the mechanical properties of rock and soil at different depths of the slope, and are especially suitable for the support of layered rock and soil slopes.

[0053] Preferably, there are two elastic membrane bags 3, and each elastic membrane bag 3 is connected to an independent membrane bag grouting pipe 33, which extends from the inside of the permeable anchor body to the outside of the main part of the anchor rod.

[0054] Specifically, please refer to Figure 1 As shown, in one embodiment of this utility model, the tail anchoring component includes an anchor plate 5 and a nut 6, wherein the anchor plate 5 is disposed at the tail of the steel flower tube body 2 away from the membrane bag steel pipe 4, and the nut 6 is anchored at the outer end of the steel flower tube body 2 and the anchor plate 5.

[0055] In this way, the tail end of the steel pipe body 2 is equipped with an anchor plate 5, and the end is anchored with a nut 6, so that the anchoring force of the anchor rod is evenly transmitted to the slope.

[0056] Specifically, please refer to Figure 4 As shown, in one embodiment of this utility model, the steel flower tube body 2 is configured as a hollow flower tube structure, and the surface of the steel flower tube body 2 is provided with uniformly distributed water permeable holes 25 in a plum blossom pattern, with the hole diameter of the water permeable holes 25 being 8mm-12mm.

[0057] In this embodiment, the surface of the steel pipe body 2 is provided with permeable holes 25 arranged in a plum blossom pattern. Preferably, the diameter of the permeable holes 25 is 10mm, the spacing between the permeable holes 25 is 12cm, and the permeable holes 25 are evenly distributed in the circumferential direction of the steel pipe body 2 (4 holes per circumference). Adjacent rows of holes are arranged in an alternating manner to ensure that water seeps in evenly from all directions.

[0058] Specifically, please refer to Figure 5 As shown, in one embodiment of this utility model, the length of the elastic film bag 3 is 40-50cm, the initial diameter of the elastic film bag 3 is equal to the outer diameter of the steel flower tube 2, and the outer diameter of the elastic film bag 3 after expansion is 30-50cm.

[0059] In this embodiment, the elastic membrane bag 3 is an annular bag with closed ends and a thickness of 6mm. The diameter of the two ends of the elastic membrane bag 3 is smaller than the outer diameter of the membrane bag steel pipe 4.

[0060] Specifically, please refer to Figure 4 As shown, in one embodiment of this utility model, a grouting pipe orifice 23 is provided on the outer wall of the steel flower pipe body 2 near the adjacent elastic membrane bag 3. The portion of the membrane bag grouting pipe 33 located in the inner cavity of the steel flower pipe body 2 passes through the grouting pipe orifice 23 and is connected to the one-way channel grouting port 31. A check valve 32 is also provided at the one-way channel grouting port 31.

[0061] In this embodiment, the steel perforated pipe body 2 is made of 304 stainless steel hollow perforated pipe. The steel perforated pipe body 2 is segmented, with each segment being 2m long. Adjacent segments are connected by external and internal threaded joints, allowing for flexible splicing according to the slope support depth. The end of the elastic membrane bag 3 is equipped with a one-way grouting port 31 with a check valve 32. The one-way grouting port 31 is connected to the membrane bag grouting pipe 33. The check valve 32 can effectively prevent the backflow of cement grout after grouting.

[0062] Specifically, please refer to Figure 6 As shown, in one embodiment of this utility model, the membrane bag grouting pipe 33 includes a horizontal grouting pipe and a vertical grouting pipe. The vertical grouting pipe is threaded to the end of the horizontal grouting pipe after being inserted into the grouting pipe orifice 23. At least one lifting ring 7 is provided inside the cavity of the steel flower pipe body 2. The lifting ring 7 is used to support and fix the horizontal grouting pipe.

[0063] This facilitates the installation and removal of the membrane bag grouting pipe 33. The membrane bag grouting pipe 33 is installed inside the cavity of the permeable anchor body using lifting rings 7. The lifting rings 7 are fixed to the inner end of the cavity of the steel flower pipe body 2 by nuts.

[0064] Specifically, please refer to Figure 5As shown, in one embodiment of this utility model, the outer surface of the membrane bag steel pipe 4 along the length range of the elastic membrane bag 3 is provided with a deep spiral rib structure 34, and the two ends of the elastic membrane bag 3 are fixed to the two ends of the deep spiral rib structure 34 of the membrane bag steel pipe 4 by iron wire.

[0065] Thus, the elastic membrane bag 3 is fitted around the membrane bag steel pipe 4, and the two ends of the elastic membrane bag 3 are fixed to the membrane bag steel pipe 4 by wire.

[0066] Specifically, please refer to Figure 2 As shown, in one embodiment of this utility model, the anchor plate 5 has a thickness of 15-20mm, a length of 200-300mm, a width of 200-300mm, and an installation hole 51 adapted to the steel flower tube body 2 is provided in the center of the anchor plate 5.

[0067] As a preferred embodiment, the anchor plate 5 is made of Q235 steel plate, the thickness of the anchor plate 5 is 18mm, the width of the anchor plate 5 is 280mm, the length of the anchor plate 5 is 280mm, and the center of the anchor plate 5 is provided with an installation hole 51 that is adapted to the steel flower tube body 2. The diameter of the installation hole 51 is the same as the outer diameter of the steel flower tube body 2.

[0068] Specifically, please refer to Figure 1 As shown, in one embodiment of this utility model, the distance between adjacent elastic film bags 3 is 1.5m-2.5m.

[0069] The implementation process of the permeable anchor structure for slope support in this embodiment is as follows:

[0070] Assembly of elastic membrane bag 3 and membrane bag steel tube 4: Fit the elastic membrane bag 3 into the preset position of the membrane bag steel tube 4, and fix both ends of the elastic membrane bag 3 firmly with iron wire to ensure that it does not shift;

[0071] Permeable anchor assembly: According to the slope support depth requirements, the multi-segment membrane bag steel pipe 4 and steel flower pipe body 2 are spliced ​​to the required length through internal and external threads, and then the tapered anchor head 1 is connected to the front end of the steel flower pipe body 2; while assembling the membrane bag steel pipe 4 and steel flower pipe body 2, the membrane bag grouting pipe 33 is also assembled together. The membrane bag grouting pipe 33 passes through the lifting ring 7 inside the permeable anchor body and is connected to the one-way channel grouting port 31 in one direction through the grouting pipe orifice 23 on the side of the steel flower pipe body 2 near the membrane bag steel pipe 4.

[0072] Anchor bolt hole drilling: According to the depth and angle of the engineering design, anchor bolt holes are drilled on the slope. At the same time, the holes are enlarged at the corresponding positions of the elastic membrane bag 3. The diameter of the enlarged holes is 1.1 times the outer diameter of the elastic membrane bag 3 after expansion.

[0073] Installing the anchor bolts: Slowly insert the assembled anchor bolt structure into the borehole, ensuring that the conical anchor head 1 faces the bottom of the borehole and the anchor plate 5 is in contact with the slope surface;

[0074] Cement grouting of elastic membrane bag 3: Cement grout is injected into elastic membrane bag 3 through membrane bag grouting pipe 33. The grouting pressure is determined according to the formation conditions until elastic membrane bag 3 is fully expanded and tightly adheres to the borehole wall. After grouting is completed, check valve 32 is closed. The threaded connection between the end of membrane bag grouting pipe 33 and the end of membrane bag steel pipe 4 is removed. Then the horizontal section of membrane bag grouting pipe 33 is removed. For temporary support projects, components such as steel flower pipe body 2, elastic membrane bag 3 and membrane bag steel pipe 4 can be recycled and reused.

[0075] Injecting permeable mortar 8 into the anchor rod body: Inject permeable mortar 8 into the interior of the anchor rod body (i.e., the steel flower pipe body 2 and the membrane bag steel pipe 4) to ensure a dense filling;

[0076] Applying anchors: After the cement grout and permeable mortar 8 reach the design strength, install the anchor plate 5 at the tail of the steel pipe body 2, and then use nuts 6 to anchor it, thus completing the construction of the entire anchor rod.

[0077] The permeable anchor structure in this embodiment combines efficient drainage and high pull-out bearing capacity, effectively adapting to complex working conditions such as reservoir water level fluctuations, abundant groundwater, and areas with heavy rainfall. It is also simple in structure, easy to prefabricate, and efficient in construction, showing good prospects for engineering applications.

[0078] The present invention has been disclosed above, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A permeable anchor structure for slope protection, characterized in that: It includes a conical anchor head, a permeable anchor body, and a tail anchoring component connected in sequence, wherein one end of the permeable anchor body near the conical anchor head is connected to the end of the conical anchor head; The permeable anchor body includes at least one section of membrane bag steel pipe and steel flower pipe body, as well as an elastic membrane bag elastically fitted on the outer surface of the membrane bag steel pipe. One end of the membrane bag steel pipe is connected to the conical anchor head, and the other end is connected to the steel flower pipe body. The inner diameter of the steel flower pipe body and the membrane bag steel pipe are equal, and the cavities of the steel flower pipe body and the membrane bag steel pipe are filled with permeable mortar. The elastic membrane bag is an annular bag with closed ends. The diameter of the two ends of the elastic membrane bag is smaller than the outer diameter of the membrane bag steel pipe. The two ends of the elastic membrane bag are fixed on the outer circumference of the two sides of the membrane bag steel pipe. The end of the elastic membrane bag is provided with a one-way channel grouting port. The one-way channel grouting port is connected to the membrane bag grouting pipe. The end of the membrane bag grouting pipe away from the one-way channel grouting port extends through the interior of the permeable anchor body and passes through the tail anchoring component.

2. The permeable anchor structure for slope protection according to claim 1, characterized in that: Two of each of the membrane bag steel pipe and the steel flower tube body are provided, and the membrane bag steel pipe and the steel flower tube body are coaxially spaced apart from each other. The two ends of the membrane bag steel pipe extend 30cm-50cm out of the elastic membrane bag, and the membrane bag steel pipe and the steel flower tube body are threaded together.

3. The permeable anchor structure for slope protection according to claim 1, characterized in that: The tail anchoring component includes an anchor plate disposed at the end of the steel flower tube body away from the membrane bag steel pipe and a nut anchored to the outer end of the steel flower tube body and the anchor plate.

4. The permeable anchor structure for slope protection according to claim 1, characterized in that: The steel flower tube body is configured as a hollow flower tube structure, and the surface of the steel flower tube body is provided with uniformly distributed permeable holes in a plum blossom pattern, the diameter of the permeable holes being 8-12mm.

5. The permeable anchor structure for slope protection according to claim 1, characterized in that: The elastic membrane bag has a length of 40-50cm, the initial diameter of the elastic membrane bag is equal to the outer diameter of the steel flower tube, and the outer diameter of the elastic membrane bag after expansion is 30-50cm.

6. The permeable anchor structure for slope protection according to claim 1, characterized in that: A grouting pipe opening is provided on the outer wall of the steel flower tube body near the adjacent elastic membrane bag. The portion of the membrane bag grouting pipe located in the inner cavity of the steel flower tube body passes through the grouting pipe opening and connects with the one-way channel grouting port. A check valve is also provided at the one-way channel grouting port.

7. The permeable anchor structure for slope protection according to claim 6, characterized in that: The membrane bag grouting pipe includes a horizontal grouting pipe and a vertical grouting pipe. The vertical grouting pipe is threaded to the end of the horizontal grouting pipe after being inserted into the grouting pipe orifice. At least one lifting ring is provided inside the cavity of the steel flower pipe body. The lifting ring is used to support and fix the horizontal grouting pipe.

8. The permeable anchor structure for slope protection according to claim 1, characterized in that: The outer surface of the membrane bag steel pipe along the length of the elastic membrane bag is provided with a deep spiral rib structure, and the two ends of the elastic membrane bag are fixed to the two ends of the deep spiral rib structure of the membrane bag steel pipe by iron wire.

9. The permeable anchor structure for slope protection according to claim 3, characterized in that: The anchor plate has a thickness of 15-20mm, a length of 200-300mm, a width of 200-300mm, and a mounting hole adapted to the steel pipe body is provided in the center of the anchor plate.

10. The permeable anchor structure for slope protection according to claim 1, characterized in that: The distance between adjacent elastic film bags is 1.5m-2.5m.

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