A new type of slope anchor cable anchoring structure

Abstract

The utility model discloses a novel side slope anchor cable anchoring structure, the anchoring structure includes the bag structure, the grouting body, the guide cap, the steel strand and the anchor head, the bag structure is gourd -shaped and is set up in the side slope in the inclination, the grouting body fills in the bag structure, one end of steel strand is connected with the guide cap and is fixed in the grouting body, and the other end is anchored on the surface of the side slope through the anchor head. The utility model has the advantages that: through the interval sleeve of short bag of long bag surface, the synergies in the grouting process, will form gourd -shaped structure, can realize the close engagement with the slide bed of side slope stable rock-soil body, has changed the traditional anchor cable only relies on the combination mode of the grout and the hole wall bonding, greatly enhances the tensile force along the hole axis direction, can effectively avoid the anchoring system displacement or failure under the extreme working condition such as heavy rainfall, earthquake, guarantees the long -term stability of side slope.

Description

Technical Field

[0001] This utility model relates to the technical field of slope reinforcement, and in particular to a novel slope anchor cable anchoring structure. Background Technology

[0002] In the field of construction engineering, slope stability is a key issue for ensuring the safe progress and long-term operation of projects. Especially in scenarios such as mountain construction, transportation line construction, and mining, landslides and collapses caused by slope instability can not only cause huge economic losses but also threaten human lives. Therefore, slope reinforcement technology has always been a key area of ​​research and application in the industry. Among them, anchor cable reinforcement technology has become one of the mainstream reinforcement methods due to its advantages such as high load-bearing capacity, wide applicability, and minimal disturbance to the slope.

[0003] Traditional anchor cable reinforcement technology mainly involves drilling holes in the slope's soil and rock mass, inserting load-bearing components such as steel strands into the holes, and then injecting cement grout. After the grout solidifies, it forms a unified whole with the soil and rock mass, and then transmits tensile force through the anchor head to achieve slope reinforcement and constraint. However, in long-term practical application, traditional technology has gradually revealed many limitations: on the one hand, during the grouting process, the grout can easily seep into the slope's slip zone, potentially reducing the overall load-bearing capacity of the anchoring system due to grout loss; on the other hand, because there is a gap between the drilled hole and the steel strand, grout leakage is prone to occur during grouting, not only wasting materials but also potentially compressing the surface soil and rock mass of the slope, damaging the original stability of the slope, and increasing the risk of secondary disasters.

[0004] Meanwhile, the bonding between traditional anchor cables and the soil / rock mass mainly relies on the adhesion between the grout and the borehole wall, resulting in insufficient tensile strength along the borehole axis. Under extreme conditions such as heavy rainfall and earthquakes, the anchoring system is prone to displacement or even failure. As engineering projects expand into areas with complex geological conditions, higher demands are placed on the stability, durability, and construction efficiency of slope reinforcement technologies. Traditional anchor cable reinforcement techniques are no longer sufficient to meet practical engineering needs. There is an urgent need to develop a new type of anchor cable reinforcement method that can solve the problems of grout leakage and runoff, and improve the axial tensile strength, in order to overcome existing technological bottlenecks and ensure the long-term safety and stability of slope engineering. Summary of the Invention

[0005] The purpose of this utility model is to provide a novel slope anchor cable anchoring structure to address the shortcomings of the existing technology. This anchoring structure consists of a bag structure, a grouting body, a guide cap, steel strands, and an anchor head, which can improve the tensile strength along the axis of the hole and ensure the safety of the slope structure.

[0006] The objective of this utility model is achieved through the following technical solution: A novel slope anchor cable anchoring structure is disclosed, comprising a bag structure, a grouting body, a guide cap, a steel strand, and an anchor head. The bag structure is gourd-shaped and inclinedly arranged within the slope. The grouting body fills the bag structure. One end of the steel strand is connected to the guide cap and fixed in the grouting body, while the other end is anchored to the surface of the slope via the anchor head.

[0007] The sac structure includes a long sac and several short sac sleeves, which are spaced apart and fitted over the long sac. The maximum diameter of the long sac in its inflated state is greater than the maximum diameter of the short sac sleeves in their inflated state.

[0008] The end of the bag structure closest to the slope surface is an open end and is provided with a grout stop plug. The grout stop plug has mounting holes for installing the steel strand and the grouting pipe.

[0009] The steel strands are positioned using isolation brackets.

[0010] The guide cap is conical.

[0011] The steel strand is wrapped in a PE pipe.

[0012] The anchor head is covered by a net.

[0013] The advantages of this utility model are: 1. By interspersing short sleeves on the surface of the long bladder, the synergistic effect during the grouting process forms a gourd-shaped structure, which can tightly interlock with the sliding bed of the stable rock and soil of the slope. This changes the traditional anchor cable bonding method that relies solely on grout to bond with the hole wall, greatly enhancing the tensile strength along the axis of the hole. Under extreme conditions such as heavy rainfall and earthquakes, it can effectively prevent the anchoring system from shifting or failing, ensuring the long-term stability of the slope. 2. The long sac itself has excellent sealing properties, which can completely encapsulate the internal grout during the grouting process, preventing the grout from seeping into the slope slip zone and avoiding damage to the mechanical properties of the soil and rock at the slip surface due to grout interference. This ensures that the overall bearing capacity of the anchoring system is not affected, solving the problem of reduced reinforcement effect caused by grout loss during traditional anchor grouting. Combined with the leak-proof function of the grout stopper, it can completely solve the grout leakage problem in traditional technology, saving grouting materials and preventing grout from squeezing the surface soil and rock of the slope, avoiding damage to the original stability of the slope and reducing the risk of secondary disasters. Attached Figure Description

[0014] Figure 1 This is a sectional view of the novel slope anchor cable anchoring structure of this utility model; Figure 2 for Figure 1 Cross-sectional view of AA in the middle; Figure 3 for Figure 1 Cross-sectional view of BB in the middle; Figure 4 This is a schematic diagram of the assembly of the bag structure of this utility model; like Figures 1-4 As shown in the figure, the labels represent: 1. Long bladder bag; 2. Guide cap; 3. Steel strand; 4. Short bladder sleeve; 5. Grouting pipe; 6. Grout stop plug; 7. Isolation bracket; 8. Anchor head; 9. Net cover. Detailed Implementation

[0015] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art: Example: Figures 1-4 As shown, this embodiment relates to a novel slope anchoring structure. This anchoring structure mainly includes a bag structure, a grouting body, a guide cap 2, steel strands 3, and an anchor head 8. The bag structure is gourd-shaped and inclined within the slope. The grouting body fills the bag structure. Specifically, the bag structure includes a long bag 1 and several short bags 4. The short bags 4 are spaced outside the long bag 1. One end of the long bag 1 is closed, and the other end is open. Both ends of the short bags 4 are open. The end of the long bag 1 closest to the slope surface is the open end and is equipped with a grout-stopping plug 6. The grout-stopping plug 6 has mounting holes for installing the steel strands 3 and the grouting pipes 5. One end of both the steel strands 3 and the grouting pipes 5 is installed inside the long bag 1. The steel strands 3 are positioned by an isolation bracket 7. In this embodiment, the steel strands 3 are wrapped in PE pipes for corrosion protection. For force transmission, the grout stopper 6 is made of an elastic material (such as rubber) to achieve a seal between the grout stopper 6 and the steel strand 3 (grouting pipe 5). There are six steel strands 3, namely four first steel strands and two second steel strands. There are two grouting pipes 5. The grout stopper 6 has a circular structure and four steel strand mounting holes (for installing the first steel strands) are opened along its circumference. The grout stopper 6 has two opposite steel strand mounting holes (for installing the second steel strands) and two opposite grouting pipe mounting holes at its center. The isolation bracket 7 has a square structure and a steel strand positioning groove at each of its four corners (for positioning the first steel strands). The isolation bracket 7 has a circular hole at its center for installing the steel strands 3 (second steel strands) and the grouting pipe 5. The maximum diameter of the long bladder 1 in the inflated state is greater than that of the short bladder 4 in the inflated state. In this embodiment, the maximum diameter of the short bladder 4 in the inflated state is half that of the long bladder 1 in the inflated state. When grout is injected into the long bladder 1 through the grouting pipe 5 (the grout solidifies to form a grout body), the long bladder 1 forms a gourd-shaped structure under the constraint of the short bladder 4, and the gourd-shaped structure engages with the slide bed.

[0016] One end of the steel strand 3 is connected to the guide cap 2 and fixed in the grouting body (within the bag structure), while the other end is anchored to the surface of the slope via the anchor head 8. Specifically, the guide cap 2 is conical, and its maximum diameter is larger than that of the steel strand 3. This not only facilitates the installation of the steel strand 3 into the bag structure and the insertion of the bag structure into the borehole, but also strengthens the connection between the steel strand 3 and the grouting body. The anchor head 8 is wrapped by a mesh cover 9, which can both transmit tension and protect the anchor head 8.

[0017] like Figures 1-4 As shown, this embodiment also relates to a construction method for a novel slope anchor cable anchoring structure, which mainly includes the following steps: S1. Determine the drilling location and depth based on the slope geological conditions. After drilling, clean the debris and water inside the hole to ensure the hole wall is clean. At the same time, check the integrity of each component, such as whether the long bag 1 is damaged, whether the steel strand 3 is intact, and whether the sealing performance of the grout stop plug 6 meets the standards.

[0018] S2. Connect the guide cap 2 to one end of the steel strand 3, then insert the end of the steel strand 3 with the guide cap 2 into the long bag 1, adjust the position of the long bag 1 so that the guide cap 2 fits the end of the long bag 1; put short bags 4 on the surface of the long bag 1 according to the design spacing to ensure that the binding is firm and the spacing is uniform; fix the isolation bracket 7 on the steel strand 3 so that the steel strand 3 is centered and evenly distributed in the long bag 1.

[0019] S3. Slowly insert the assembled bag-steel strand assembly into the borehole, ensuring that the bag structure is fully extended into the slide area; install the grout stopper 6, so that the grouting pipe 5 and the steel strand 3 pass through the corresponding channels of the grout stopper 6 respectively, and compact the grout stopper 6 to achieve borehole sealing.

[0020] S4. Inject cement grout into the bag structure through the grouting pipe 5, control the grouting pressure and speed, and ensure that the grout fully fills the internal gaps of the bag structure until the long bag 1 forms a gourd shape under the constraint of the short bag sleeve 4 and the grout is full. After stopping the grouting, seal the grouting pipe 5.

[0021] S5. After the grout inside the bag structure has solidified to the design strength, install anchor heads 8 at the ends of the steel strands 3 outside the slope, adjust the tension of the anchor heads 8 to the design value, and finally install the mesh cover 9 outside the anchor heads 8.

[0022] S6. Complete the installation of the entire anchor cable reinforcement system.

[0023] The beneficial technical effects of this embodiment are as follows: 1. By interspersing short sleeves on the surface of the long bladder, the synergistic effect during the grouting process forms a gourd-shaped structure, which can tightly interlock with the sliding bed of the stable rock and soil of the slope. This changes the traditional anchor cable bonding method that relies solely on grout to bond with the hole wall, greatly enhancing the tensile strength along the axis of the hole. Under extreme conditions such as heavy rainfall and earthquakes, it can effectively prevent the anchoring system from shifting or failing, ensuring the long-term stability of the slope. 2. The long sac itself has excellent sealing properties, which can completely encapsulate the internal grout during the grouting process, preventing the grout from seeping into the slope slip zone and avoiding damage to the mechanical properties of the soil and rock at the slip surface due to grout interference. This ensures that the overall bearing capacity of the anchoring system is not affected, solving the problem of reduced reinforcement effect caused by grout loss during traditional anchor grouting. Combined with the leak-proof function of the grout stopper, it can completely solve the grout leakage problem in traditional technology, saving grouting materials and preventing grout from squeezing the surface soil and rock of the slope, avoiding damage to the original stability of the slope and reducing the risk of secondary disasters.

Claims

1. A novel slope anchor cable anchoring structure, characterized in that... The anchoring structure includes a bag structure, a grouting body, a guide cap, a steel strand, and an anchor head. The bag structure is gourd-shaped and inclinedly installed in the slope. The grouting body fills the bag structure. One end of the steel strand is connected to the guide cap and fixed in the grouting body, and the other end is anchored to the surface of the slope through the anchor head.

2. The novel slope anchor cable anchoring structure as described in claim 1, characterized in that... The sac structure includes a long sac and several short sac sleeves, which are spaced apart and fitted over the long sac. The maximum diameter of the long sac in its inflated state is greater than the maximum diameter of the short sac sleeves in their inflated state.

3. The novel slope anchor cable anchoring structure as described in claim 1, characterized in that... The end of the bag structure closest to the slope surface is an open end and is provided with a grout stop plug. The grout stop plug has mounting holes for installing the steel strand and the grouting pipe.

4. The novel slope anchor cable anchoring structure as described in claim 1, characterized in that... The steel strands are positioned using isolation brackets.

5. A novel slope anchor cable anchoring structure as described in claim 1, characterized in that... The guide cap is conical.

6. A novel slope anchor cable anchoring structure as described in claim 1, characterized in that... The steel strand is wrapped in a PE pipe.

7. A novel slope anchor cable anchoring structure as described in claim 1, characterized in that... The anchor head is covered by a net.

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