Recyclable prestressed anchor rod structure for slope support

Abstract

The utility model discloses a recoverable pre -stressed anchor rod structure for slope support relates to slope support technical field, including anchor rod body and detachable recycling mechanism, the inside of anchor rod body is provided with detachable recycling mechanism, and detachable recycling mechanism includes the clamping slot of setting in the inner wall position of anchor rod body, the inner surface screw thread connection of anchor rod body has fixed bolt, and the inner surface bushing of anchor rod body has the inner core rod, the outer surface fixed connection of inner core rod has the clamping block, and the outer surface fixed connection of anchor rod body has anticorrosive coating, and clamping slot is L type through slot, and the inner wall is equipped with antiskid line, and the clamping block is steel material. This recoverable pre -stressed anchor rod structure for slope support compares with the pre -stressed anchor rod structure of ordinary use of current, adopts detachable, and the whole recycling difficulty is solved, and the disassembly is convenient and shortens the recycling time, improves the recovery efficiency, and improves the construction fault tolerance, weakens the transmission of vibration, enhances the construction adaptability and the stability of force transmission, and adapts complex demand.

Description

Technical Field

[0001] This utility model relates to the field of slope protection technology, specifically to a recyclable prestressed anchor structure for slope protection. Background Technology

[0002] Slope protection is a general term for a series of reinforcement, protection, and stability control measures taken in engineering construction to prevent slopes from collapsing, landslides, deformation, and other disasters caused by factors such as the weight of the soil and rock mass, rainwater erosion, and changes in geological structure. Prestressed anchors are the core load-bearing components in slope protection systems, achieving slope reinforcement through an "active load-bearing" mode. They consist of an anchor head, rod body, anchoring section, and anti-corrosion structure. Compared to ordinary anchors, prestressed anchors can restrain slope deformation in advance, making them suitable for steep slopes, soft soil strata, or engineering scenarios with strict deformation control requirements. They also offer advantages such as good reinforcement effect, flexible construction, and minimal disturbance to the slope. However, existing prestressed anchors have certain drawbacks.

[0003] For example, a prestressed anchor bolt for foundation pits, as described in application number CN202321268374.2, includes an expansion bolt sleeve for anchoring sections, a foundation pit slope, and an anchor bolt. Anchoring holes are provided on the foundation pit slope, and the expansion bolt sleeve for anchoring sections can be inserted into the anchoring holes. Several counter-tooths are provided around the perimeter of the expansion bolt sleeve for providing tension. The number and length of the counter-tooths are designed according to the support requirements of the foundation pit slope and the magnitude of the prestressing force. This prestressed anchor bolt for foundation pits employs a quick and simple prestressing anchor application method, which not only greatly improves the anchoring effect of the anchoring section but also effectively reduces the length of the anchoring section, avoiding significant waste. Furthermore, the nuts and washers at the free end of the free section can be recycled. However, the prestressed anchor structure is difficult to adapt to complex geology, inconvenient to recycle, susceptible to corrosion and high cost. In addition, the anchor construction has a low error tolerance, is prone to material waste due to drilling deviation, is difficult to adapt to uneven deformation of soil and rock and is greatly affected by vibration.

[0004] Therefore, in view of this, we studied and improved the existing structure to address its shortcomings, and proposed a recyclable prestressed anchor structure for slope protection. Utility Model Content

[0005] The purpose of this invention is to provide a recyclable prestressed anchor structure for slope protection, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a recyclable prestressed anchor structure for slope support, comprising an anchor body and a detachable recycling mechanism. The anchor body is provided with a detachable recycling mechanism, which includes a slot formed in the inner wall of the anchor body. The inner surface of the anchor body is threaded with a fixing bolt, and an inner core rod is sleeved on the inner surface of the anchor body. A locking block is fixedly connected to the outer surface of the inner core rod, and an anti-corrosion coating is fixedly connected to the outer surface of the anchor body.

[0007] Preferably, the outer surface of the anchor rod body is threaded with a connecting sleeve, and the connecting sleeve is provided with a segmented anti-deformation mechanism.

[0008] Preferably, the segmented anti-deformation mechanism includes a connecting rod disposed on the inner surface of the connecting sleeve, and the upper and lower ends of the connecting rod are fixedly connected to hinge shafts, and elastic rods are disposed on the left and right sides of the hinge shafts.

[0009] Preferably, the outer surface of the anchor rod body is threaded with a nut, and a main washer is provided at the bottom of the nut.

[0010] Preferably, a compensating spring rod is fixedly connected to the bottom of the main pad, and a secondary pad is fixedly connected to one end of the compensating spring rod.

[0011] Preferably, a slurry stop valve is provided at the bottom of the auxiliary pad, and an extension rod is fixedly connected to the bottom of the hinge shaft.

[0012] Preferably, the outer surface of the extension rod is threaded with a rotating block, and the bottom of the rotating block is fixedly connected with an expansion shell anchor head.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, through the setting of a detachable recycling mechanism, relies on the structural design of L-shaped through groove, steel clamp, and double anti-corrosion to further realize the composite value of precise force transmission, flexible construction, and diversified adaptability to working conditions. It is suitable for the complex geology, repeated construction and low disturbance requirements in slope support. On the one hand, the bolt through the rigid connection between the anchor body and the clamp can resist the loosening of the bolt caused by slope vibration, without the need for additional anti-loosening components. On the other hand, during disassembly, only the bolt needs to be unscrewed and the inner core rod needs to be rotated to make the clamp slide out along the L-shaped through groove. Compared with the traditional welding or integrated structure, the recycling and disassembly time is shortened. It is especially suitable for scenarios with high construction efficiency requirements, such as emergency rescue projects, and reduces the risk of construction delay. Through the functional extension of each component, the anchor not only has the basic recycling function, but also achieves breakthroughs in force transmission reliability, construction efficiency, environmental adaptability and economy, providing an efficient and sustainable solution for slope support under complex working conditions. 2. This utility model, through the setting of a segmented anti-deformation mechanism, adapts to the complex needs of slope support, such as drilling deviation, uneven deformation of layered soil and rock, and efficient recycling. The flexible connection structure of the hinge shaft and connecting rod, compared with traditional rigid connection anchor rods, improves the construction error tolerance rate and significantly reduces material waste and construction delays caused by drilling deviation. The high-frequency deformation of the elastic rod can consume vibration energy, and the slight rotation of the hinge shaft further weakens the vibration transmission. Through functional expansion, the segmented anti-deformation mechanism enables the anchor rod to not only have basic anti-deformation capabilities, but also achieves breakthroughs in construction adaptability and force transmission stability, providing technical support for the efficient application of recyclable prestressed anchor rods under complex working conditions. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the detachable recycling mechanism 2 of this utility model; Figure 3 This is a schematic diagram of the segmented anti-deformation mechanism 4 of this utility model; Figure 4 This is a schematic diagram of the front view of this utility model.

[0015] In the diagram: 1. Anchor bolt body; 2. Detachable recycling mechanism; 201. Slot; 202. Fixing bolt; 203. Inner core rod; 204. Locking block; 305. Anti-corrosion coating; 3. Connecting sleeve; 4. Segmented anti-deformation mechanism; 401. Connecting rod; 402. Hinge shaft; 403. Elastic rod; 5. Nut; 6. Main pad; 7. Compensating spring rod; 8. Secondary pad; 9. Grout stop valve; 10. Extension rod; 11. Rotating block; 12. Expanding shell anchor head. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figures 1-2As shown, a recyclable prestressed anchor structure for slope support includes an anchor body 1 and a detachable recycling mechanism 2. The detachable recycling mechanism 2 is provided inside the anchor body 1, and includes a slot 201 formed in the inner wall of the anchor body 1. A fixing bolt 202 is threadedly connected to the inner surface of the anchor body 1, and an inner core rod 203 is sleeved on the inner surface of the anchor body 1. A locking block 204 is fixedly connected to the outer surface of the inner core rod 203, and an anti-corrosion coating 305 is fixedly connected to the outer surface of the anchor body 1. The slot 201 is L-shaped. The anchor rod 1 has a through groove with anti-slip texture on the inner wall. The locking block 204 is made of steel and is integrally formed with the inner core rod 203. Its size is adapted to the locking groove 201. After being inserted, it fits snugly against the groove wall. The fixing bolt 202 passes through the anchor rod body 1 and the locking block 204 to prevent the locking block 204 from moving. The anti-corrosion coating 305 is made of polytetrafluoroethylene and covers the galvanized layer on the outer surface of the anchor rod body 1 and the outer surface of the inner core rod 203 to form a double anti-corrosion layer. The anchor rod body 1 and the inner core rod 203 are designed separately to solve the difficulty of overall recycling. The inner core rod 203 can be replaced separately to avoid recycling failure caused by corrosion.

[0018] like Figure 3 As shown, the outer surface of the anchor body 1 is threaded with a connecting sleeve 3, and the connecting sleeve 3 is provided with a segmented anti-deformation mechanism 4. The segmented anti-deformation mechanism 4 includes a connecting rod 401 located on the inner surface of the connecting sleeve 3, and the upper and lower ends of the connecting rod 401 are fixedly connected with hinge shafts 402. Elastic rods 403 are provided on the left and right sides of the hinge shafts 402. The connecting rod 401 and the anchor body 1 and extension rod 10 at the upper and lower ends form a hinge structure through the hinge shafts 402 to adapt to large deformations. The elastic rods 403 absorb deformation energy, forming a linkage of "hinge buffer and elastic energy absorption", which improves the bending strength of the rod and avoids the rod breaking.

[0019] Furthermore, the outer surface of the anchor body 1 is threaded with a nut 5, and a main washer 6 is provided at the bottom of the nut 5. A compensating spring rod 7 is fixedly connected to the bottom of the main washer 6, and a secondary washer 8 is fixedly connected to one end of the compensating spring rod 7. The nut 5 is a high-strength hexagonal thin nut 5, with its internal thread precisely meshing with the external thread of the anchor body 1. The thread surface is coated with an anti-loosening coating. The main washer 6 is a circular steel plate with a through hole in the center adapted to the anchor body 1 and anti-slip ridges on the edge. The secondary washer 8 is a wear-resistant alloy plate with an arc-shaped contact surface in contact with the soil and rock. When the prestress is lost, the compensating spring rod 7 pushes the secondary washer 8 to move towards the soil and rock. By adjusting the nut 5, the main washer 6 is pressed synchronously, forming a combination of elastic compensation and mechanical locking to ensure the stability of the prestress.

[0020] Furthermore, a grout stop valve 9 is provided at the bottom of the auxiliary pad plate 8, and an extension rod 10 is fixedly connected to the bottom of the hinge shaft 402. A rotating block 11 is threadedly connected to the outer surface of the extension rod 10, and an expansion shell anchor head 12 is fixedly connected to the bottom of the rotating block 11. The grout stop valve 9 is a one-way structure to prevent grout from leaking backward. The expansion shell anchor head 12 is a split petal structure. Rotating the rotating block 11 can drive the expansion shell anchor head 12 to open radially and make close contact with the hole wall to provide initial anchoring force.

[0021] Working principle: When using the recyclable prestressed anchor structure for slope support, firstly, the anchor body 1 and the extension rod 10 are connected by the connecting sleeve 3. The segmented anti-deformation mechanism 4 is installed inside the connecting sleeve 3, so that the connecting rod 401 is hinged to the anchor body 1 and the extension rod 10 through the hinge shaft 402. Elastic rods 403 are fixed on both sides of the hinge shaft 402. The assembled anchor structure is placed into the borehole. The rotating block 11 of the anchor body 1 drives the expansion shell anchor head 12 to open and tightly fit with the borehole wall to achieve initial anchoring. Prestress is applied by the nut 5, and the main pad 6 and the auxiliary pad 8 are pressed together. In the rock and soil mass, the grout stop valve 9 prevents grout leakage, and the compensating spring rod 7 can automatically compensate for prestress loss. Under stress, the hinge shaft 402 of the segmented anti-deformation mechanism 4 adapts to slope deformation, and the elastic rod 403 absorbs deformation energy to prevent rod breakage. Finally, when it is necessary to retrieve the inner core rod 203, the inner core rod 203 is rotated, the fixing bolt 202 is loosened, and the locking block 204 is disengaged from the locking groove 201, thereby removing the inner core rod 203. The anti-corrosion coating 305 protects the anchor body 1 from corrosion, and the detachable recycling mechanism 2 ensures stable force transmission between the inner core rod 203 and the anchor body 1. This is the working principle of the recyclable prestressed anchor structure used for slope support.

Claims

1. A recyclable prestressed anchor structure for slope protection, comprising an anchor body (1) and a detachable recycling mechanism (2), characterized in that, The anchor rod body (1) is provided with a detachable recycling mechanism (2), and the detachable recycling mechanism (2) includes a slot (201) opened on the inner wall of the anchor rod body (1). The inner surface of the anchor rod body (1) is threaded with a fixing bolt (202), and the inner surface of the anchor rod body (1) is sleeved with an inner core rod (203). The outer surface of the inner core rod (203) is fixedly connected with a locking block (204), and the outer surface of the anchor rod body (1) is fixedly connected with an anti-corrosion coating (305).

2. The recyclable prestressed anchor structure for slope protection according to claim 1, characterized in that, The outer surface of the anchor body (1) is threaded with a connecting sleeve (3), and the connecting sleeve (3) is provided with a segmented anti-deformation mechanism (4).

3. A recyclable prestressed anchor structure for slope protection according to claim 2, characterized in that, The segmented anti-deformation mechanism (4) includes a connecting rod (401) located on the inner surface of the connecting sleeve (3), and the upper and lower ends of the connecting rod (401) are fixedly connected to a hinge shaft (402), and elastic rods (403) are provided on the left and right sides of the hinge shaft (402).

4. A recyclable prestressed anchor structure for slope protection according to claim 1, characterized in that, The outer surface of the anchor body (1) is threaded with a nut (5), and a main washer (6) is provided at the bottom of the nut (5).

5. A recyclable prestressed anchor structure for slope protection according to claim 4, characterized in that, The bottom of the main pad (6) is fixedly connected to a compensating spring rod (7), and one end of the compensating spring rod (7) is fixedly connected to a secondary pad (8).

6. A recyclable prestressed anchor structure for slope protection according to claim 5, characterized in that, The bottom of the sub-pad (8) is provided with a grout stop valve (9), and the bottom of the hinge shaft (402) is fixedly connected with an extension rod (10).

7. A recyclable prestressed anchor structure for slope protection according to claim 6, characterized in that, The outer surface of the extension rod (10) is threaded with a rotating block (11), and the bottom of the rotating block (11) is fixedly connected with an expansion shell anchor head (12).

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