A flexible slope support structure

Abstract

A flexible slope support structure, as shown in Figure 2, includes the main anchor cable 2 of the anchor beam, the prestressed composite anchor 3, the composite anchor rod 31, the composite anchor cable 32, the free section 321 of the composite anchor cable 32, the anchored section 322 of the composite anchor cable, the anchor fitting 323, the anchor beam - anchor rod connecting piece 33, the anchor beam 4, the free section 41 of the anchor beam, the anchored section 42 of the anchor beam, the middle anchor cable 5, the external anchored section 51 of the prestressed anchor cable, the transition section 511, the anchored section 52 of the prestressed anchor cable, the free section 53 of the prestressed anchor cable, the slope surface 6, the landslide slope body 62, the stable mountain body 63, the single anchor cable 7, the anchored section 71 of the single anchor cable, the free section 72 of the single anchor cable, the turning anchor rod 10 of the anchor beam, and the slip surface 12 of the landslide body.

Description

Technical Field

[0001] The present invention belongs to the field of geotechnical engineering, and relates to a slope support structure, specifically a flexible slope support structure. Background Art

[0002] In the field of slope support, flexible slope protection nets, prestressed anchor cable frames and anti-slide piles are widely used. Among them, flexible slope protection nets are used for the reinforcement and protection of soil or rock slopes with potential geological disasters such as collapse, landslide, shallow sliding, and dangerous rock falls. The prestressed anchor cable frame and anti-slide pile are mainly applied in engineering fields such as deep slope sliding, large landslides, and slope protection.

[0003] The current flexible protection net technology of flexible protection nets has the advantages of high toughness, high protection strength, easy spreading, etc. The active protection system has the advantages of adapting to any slope terrain, standardized installation procedures, and systematization through on-site tests and comparisons of multiple slope protection projects. The active protection net is composed of a high-strength steel wire rope flexible protection net, anchor bolts and other installation accessories, and the whole system adopts a modular installation method, which shortens the construction period and construction cost. It has the advantages of one-time forming, short construction and installation period, fast construction speed, no need for slope cutting, and being applicable to various complex terrains and the whole slope being integrated into a whole. However, the traditional flexible protection net is powerless against large landslides, and the tensioning advantage of the wire mesh cannot be well converted into an effective binding force for the deformation of the large slope in the free direction. In addition, for slopes with large landslide thrust, the anchoring force of the wire mesh and anchor cables (anchor bolts) is limited and cannot effectively form a resultant force.

[0004] On the other hand, due to the large area of a single steel wire mesh, in flat areas where the terrain protrusion is not obvious, the prestress of the anchor cables (anchor bolts) cannot be effectively distributed to each point of the wire mesh. Therefore, the anti-slide effect of the combination of the existing wire mesh and anchor cables (anchor bolts) cannot be guaranteed.

[0005] Prestressed anchor cables (anchor bolts) frames and anti-slide piles have extremely wide applications in the field of landslide and slope disease prevention and control, and have achieved very good slope disease prevention and control effects. However, the prestressed anchor cable frame technology and anti-slide piles currently have the following disadvantages:

[0006] 1. The frame has a large volume. Especially in the case of large landslide thrust, the amount of reinforced concrete of the frame structure is very large, and the large proportion of the slope concrete area makes it difficult to achieve slope greening.

[0007] 2. The construction of the slope frame is very difficult, the construction speed is slow, and it is especially not suitable for emergency or temporary projects.

[0008] 3. It is not suitable for rapid large-scale construction, and it is very difficult to achieve mechanical or semi-mechanical construction.

[0009] 4. For shallow landslides or preventing shallow collapses, prestressed anchor cables (bolts) frameworks result in huge waste of the project. Additionally, the self-weight of the framework leads to an unsatisfactory slope anti-collapse effect.

[0010] 5. Prestressed anchor cables (bolts) frameworks are divided by grades, and adjacent grades are separated by expansion joints. As a result, once a local collapse occurs, the nearby frameworks cannot play a role in joint anti-sliding.

[0011] To solve the above problems, a new solution is proposed for a slope support structure (2020111993475, 2020224768983). On the one hand, it gives full play to the advantages of the flexible protection net, such as fast construction speed, being conducive to slope greening, low project cost, and integrating the entire slope into a whole. On the other hand, it makes full use of the powerful anchoring force of the prestressed anchor cables in the prestressed anchor cable (bolt) framework structure to achieve the treatment effect on deep landslides.

[0012] However, the above solution still has the following problems:

[0013] 1. The anchor cables and bolts are independent of each other. This independent relationship easily causes some bolts to bend and fail when subjected to the tensile force of the anchor beam, and it is difficult to ensure the safety and durability of the bolts.

[0014] 2. Whether it is prestressed anti-slide piles or frame anchor cables, the anchor cable project penetrates the sliding mass and is fixed to the stable layer. Any sliding of the sliding mass will cause shear failure or damage to the anchor cables (bolts) near the sliding surface. The damaged anchor cables will corrode and fail, thus affecting the durability of the anti-slide project.

[0015] 3. Although the anti-slide pile project is reliable, once the prestressed anchor cables near the sliding surface fail, the role of the anti-slide piles will be greatly reduced, seriously affecting the reliability and durability of the anti-slide project. Moreover, the construction speed of the anti-slide pile project is extremely slow, the cost is high, and the construction is difficult.

[0016] Therefore, a new solution is needed to solve the above problems. Summary of the Invention

[0017] To achieve the above object, the present invention relates to a flexible slope support structure, and the specific content is as follows: A flexible slope support structure, including a flexible wire mesh grid 1, an anchor beam main cable 2, a prestressed composite anchor 3, a composite anchor rod 31, a composite cable 32, a free section 321 of the composite cable 32, an anchored section 322 of the composite cable 32, an anchor 323, an anchor beam anchor rod connector 33, an anchor beam 4, a free section 41 of the anchor beam, an anchored section 42 of the anchor beam, a casing 43, an anti-rust mortar 44, a prestressed tendon 45, an intermediate cable 5, an external anchored section 51 of the prestressed cable, a transition section 511, a reinforcing rib 512, an anchored section 52 of the prestressed cable, a free section 53 of the prestressed cable, a transition section 511 of the external anchored section 51 of the prestressed cable, a slope surface 6, a landslide boundary 61, a landslide slope body 62, a stable mountain body 63, a single cable 7, an anchored section 71 of the single cable, a free section 72 of the single cable, an anchor beam turning anchor rod 10, an edge support cable 11, and a landslide surface 12 of the landslide body.

[0018] It is characterized in that: The part of the anchor beam 4 fixed on the landslide slope body 62 within the landslide boundary 61 is the free section 41 of the anchor beam, and the part of the anchor beam 4 fixed outside the landslide boundary 61 is the anchored section 42 of the anchor beam. Among them, the anchored section 42 of the anchor beam is anchored and connected to the stable mountain body 63 through the anchor beam main cable 2. The free section 41 of the anchor beam is fixed on the landslide slope body 62 through the prestressed composite anchor 3, the intermediate cable 5 and the single cable 7. One or more bundles of anchor beam main cables 2 are distributed on the anchored section 42 of the anchor beam 4, and the anchor beam turning anchor rod 10 is arranged adjacent to the anchor beam main cable 2. One or more composite anchors 3 are distributed on the free section 41 of the anchor beam, and several intermediate cables 5 and single cables 7 are arranged adjacent to the prestressed composite anchor 3. Zero or more anchor beam turning anchor rods 10 are arranged adjacent to the intermediate cable 5 and the single cable 7. The anchor beam 4, the anchor beam main cable 2, the anchor beam turning anchor rod 10, the prestressed composite anchor 3, the intermediate cable 5 and the single cable 7 are mechanically connected. The center of the anchor beam 4 is equipped with a prestressed tendon 45, the prestressed tendon 45 is wrapped with an anti-rust mortar 44, and the outside of the anti-rust mortar 44 is a casing 43.

[0019] The anchor beams 4 are arranged crosswise in the transverse or longitudinal direction of the slope. At the intersection position of every two anchor beams 4, an intermediate cable 5, a prestressed composite anchor 3 or an anchor beam turning anchor rod 10 is provided; The curve of the anchor beam 4 near the anchor beam turning anchor rod 10 is a convex curve, and the curve of the anchor beam 4 near the intermediate cable 5 and the single cable 7 is a concave curve.

[0020] The flexible wire mesh grid 1 is laid on the slope surface 6. The flexible wire mesh grid 1 is connected to the edge support cable 11, and the edge support cable 11 is mechanically connected to the prestressed composite anchor 3, the single cable 7 and the anchor beam turning anchor rod 10.

[0021] The main anchor cable 2 and the middle anchor cable 5 of the anchor beam are characterized in that the end farthest from the ground is the prestressed anchor cable anchoring section 52, the middle section is the prestressed anchor cable free section 53, and the prestressed anchor cable outer anchor section 51 is close to the ground. A transition section 511 is arranged between the prestressed anchor cable free section 53 and the prestressed anchor cable outer anchor section 51, and a reinforcing rib 512 is arranged on the part of the prestressed anchor cable outer anchor section 51 close to the ground. The main anchor cable 2 of the anchor beam is arranged in a stable mountain 63, and the middle anchor cable 5 is arranged on the landslide slope 62 within the landslide boundary 61.

[0022] The prestressed anchor cable anchoring section 52 of the middle anchor cable 5 is connected above and below the sliding surface 12 of the landslide body. The lower end of the prestressed anchor cable anchoring section 52 is below the sliding surface 12 of the landslide body, and the upper end of the prestressed anchor cable anchoring section 52 is above the sliding surface 12 of the landslide body and is located in the landslide body 62.

[0023] The prestressed composite anchor 3 is composed of one or more composite anchor rods 31 and one or more composite anchor cables 32. The composite anchor rod 31 and the composite anchor cable 32 are fixed near the upper end of the composite anchor rod 31 by an anchor 323 arranged at the top of the free section 321 of the composite anchor cable 32. An anchor beam anchor rod connector 33 is arranged at the upper end of the composite anchor rod 31. The angle between any composite anchor rod 31 and the composite anchor cable 32 on the same prestressed composite anchor 3 is а, and satisfies 30°≤а≤180°. The composite anchor 3 and the anchor beam 4 are connected together at the anchor beam free section 41 by the anchor beam anchor rod connector 33. The composite anchor cable 32 is composed of an anchor 323, a free section 321, and a composite anchor cable anchoring section 322 from top to bottom.

[0024] The single anchor cable 7 is composed of a single anchor cable anchoring section 71 and a single anchor cable free section 72. The single anchor cable free section 72 is mechanically connected to the anchor beam free section 41. The single anchor cable 7 is arranged within the landslide boundary 61 and in the landslide slope body 62 above the landslide body sliding surface 12. A composite anchor 3 or an anchor beam steering anchor rod 10 is arranged adjacent to the single anchor cable 7.

[0025] The anchor beam steering anchor rod 10 is mechanically connected to the anchor beam 4, and the angle θ between the anchor beam steering anchor rod 10 and the anchor beam 4 is not greater than 90°.

[0026] The present invention relates to a flexible slope support structure. The part of the anchor beam 4 fixed outside the landslide boundary 61 is the anchor beam anchorage section 42. The anchor beam anchorage section 42 receives the anchoring force from the main anchor cable 2 of the anchor beam and is anchored in the stable mountain body 63. The part of the anchor beam 4 fixed on the landslide slope body 62 within the landslide boundary 61 is the anchor beam free section 41. The tensile force from the main anchor cable 2 of the anchor beam acts on the anchor beam anchorage section 42 of the anchor beam 4. After the direction is changed by the anchor beam turning anchor rod 10, the tensile force is transmitted to the anchor beam free section 41. The anchor beam free section 41 further generates a force towards the mountain body on the landslide slope body 62 within the landslide boundary 61 through the middle anchor cable 5, the composite anchor 3, the single anchor cable 7 and the anchor beam turning anchor rod 10 within the landslide body, preventing the sliding of the landslide slope body 62 and achieving the anchoring effect.

[0027] The flexible wire mesh grid 1 transfers the landslide thrust of the future slope surface 6 towards the free face to the composite anchor 3, the middle anchor cable 5, the single anchor cable 7 and the anchor beam turning anchor rod 10 through the edge support rope 11. The composite anchor 3, the single anchor cable 7, the middle anchor cable 5 and the anchor beam turning anchor rod 10 further transfer the force to the anchor beam free section 41. The anchor beam free section 41 further transfers the force from the composite anchor 3, the middle anchor cable 5 and the single anchor cable 7 to the anchor beam anchorage section 42. The anchor beam anchorage section 42 further realizes the anchoring effect through the anchoring tensile force of the anchor beam main anchor cable 2 towards the stable mountain body 63.

[0028] The described prestressed composite anchor 3 is composed of one or more composite anchor rods 31 and one or more composite anchor cables 32. The composite anchor rods 31 and the composite anchor cables 32 are fixed near the upper end of the composite anchor rods 31 through the anchor fittings 323 arranged at the top of the free section 321 of the composite anchor cables 32. The included angle α between any one of the composite anchor rods 31 and the composite anchor cables 32 on the same prestressed composite anchor 3 satisfies 30° ≤ α ≤ 180°. This combined structure of the composite anchor 3 greatly reduces the risk of bending failure of the composite anchor rods 31 under the action of the tensile force of the anchor beam free section 41.

[0029] The prestressed anchor cable anchorage section 52 of the described middle anchor cable 5 is penetrated above and below the landslide surface 12 of the landslide body. The lower end of the prestressed anchor cable anchorage section 52 is below the landslide surface 12 of the landslide body, and the upper end part of the prestressed anchor cable anchorage section 52 is within the landslide slope body 62 above the landslide surface 12, avoiding the situation that while the landslide slope body 62 slides, the anchoring effect of the anchor cable anchorage section 52 is damaged, further causing the tensile force failure of the upper anchor cable outer anchor section 51 of the middle anchor cable 5 on the anchor beam free section 41 and affecting the overall anchoring effect of the anchor beam 4 on the landslide slope body 62.

[0030] The described single cable anchor 7 consists of a single cable anchor fixed section 71 and a single cable anchor free section 72. The single cable anchor free section 72 is mechanically connected to the anchor beam free section 41. The single cable anchor 7 is arranged within the landslide boundary 61 and above the landslide slip surface 12 in the landslide mass 62 of the landslide slope. The single cable anchor 7 directly transmits the landslide body's downward sliding force to the anchor beam 4, and at the same time changes the linear shape of the anchor beam 4, which is beneficial to the axial compression of the composite anchor rod 31 of the prestressed composite anchor 3.

[0031] The described anchor beam turning anchor rod 10 is mechanically connected to the anchor beam 4, and the included angle θ between the anchor beam turning anchor rod 10 and the anchor beam 4 is not greater than 90°.

[0032] The benefits of the present invention are as follows: By implementing a flexible slope support structure in stages, a support solution is provided for the slope. While avoiding the damage of the landslide body to the engineering cable anchor structure, the overall stability of the slope body is improved, effectively preventing the harm caused by the corrosion and failure of the cable anchor near the slip surface, accelerating the construction progress, reducing the construction period, lowering the project cost, increasing the reliability of the structure, and at the same time providing an important foundation for slope greening and environmental friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a plan view of the present invention;

[0034] Figure 2 is a structural schematic diagram of the new flexible slope support structure perpendicular to the slope surface;

[0035] Figure 3 is a structural and layout schematic diagram of the main cable anchor 2 and the middle cable anchor 5 of the anchor beam perpendicular to the slope surface;

[0036] Figure 4 is a structural schematic diagram of the external anchor section 51 of the cable anchor;

[0037] Figure 5 is a structural schematic diagram of the prestressed composite anchor 3;

[0038] Figure 6 is a structural schematic diagram of the anchor beam 4;

[0039] Figure 7 is a plan view of Embodiment 2;

[0040] Figure 8 is a plan view of Embodiment 3;

[0041] Figure 9 is a plan view of Embodiment 4.

[0042] In the figure: flexible wire mesh grid 1, main anchor cable of anchor beam 2, prestressed composite anchor 3, composite anchor rod 31, composite anchor cable 32, free section 321 of composite anchor cable 32, anchored section 322 of composite anchor cable, anchor 323, connecting piece between anchor beam and anchor rod 33, anchor beam 4, free section 41 of anchor beam, anchored section 42 of anchor beam, casing 43, antirust mortar 44, prestressed tendon 45, middle anchor cable 5, external anchored section 51 of prestressed anchor cable, transition section 511, reinforcing rib 512, anchored section 52 of prestressed anchor cable, free section 53 of prestressed anchor cable, transition section 511 of external anchored section 51 of prestressed anchor cable, slope surface 6, landslide boundary 61, landslide mass 62, stable mountain body 63, single anchor cable 7, anchored section 71 of single anchor cable, free section 72 of single anchor cable, turning anchor rod of anchor beam 10, edge support rope 11, slip surface of landslide mass 12. Specific implementation mode

[0043] The following combines the attached Figure 1 , attached Figure 2 , attached Figure 3 , attached Figure 4 , attached Figure 5 , attached Figure 6 , attached Figure 7 , attached Figure 8 , attached Figure 9 The structure of the present invention and its beneficial effects are further described.

[0044] Example 1

[0045] The application of a flexible slope support structure on a typical landslide, the structure and implementation steps are as follows:

[0046] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, first, the construction of the main anchor cable 2 of the anchor beam, the middle anchor cable 5 and the single anchor cable 7 is carried out. Among them, the lower end of the anchored section 52 of the prestressed anchor cable of the middle anchor cable 5 is below the slip surface 12 of the landslide mass, and the upper end of the anchored section 52 of the prestressed anchor cable is above the slip surface 12 of the landslide mass and is located within the landslide mass 62. At the same time, the free section 53, transition section 511 and external anchored section 51 of the prestressed anchor cable of the main anchor cable 2 and the middle anchor cable 5 are completed. Among them, the part of the external anchored section 51 of the prestressed anchor cable close to the ground surface is provided with a reinforcing rib 512. The main anchor cable 2 is arranged in the stable mountain body 63, the middle anchor cable 5 is arranged on the landslide mass 62 within the landslide boundary 61. The single anchor cable 7 is composed of an anchored section 71 of the single anchor cable and a free section 72 of the single anchor cable. The free section 72 of the single anchor cable is mechanically connected to the free section 41 of the anchor beam. The single anchor cable 7 is arranged within the landslide mass 62 above the slip surface 12 of the landslide mass and within the landslide boundary 61.

[0047] Further complete the construction of the prestressed composite anchor 3. The prestressed composite anchor 3 is arranged on the landslide slope body 62 within the landslide boundary 61. First, complete the construction of the composite anchor rod 31, the composite cable anchor section 322 of the composite cable 32, the free section 321 of the composite cable 32, and the construction of the embedded anchor beam anchor rod connector 33. After the anchor beam main cable 2, the middle cable 5, the prestressed composite anchor 3, and the single cable 7 reach the strength age, perform the prestress pre-tensioning of the anchor beam main cable 2 and the middle cable 5. Among them, the middle cable 5 initially achieves the anchoring effect by using the anchoring force of the prestressed cable anchor section 52 and the reaction force provided by the external anchor section 51 of the prestressed cable. Implement the connection prestress tensioning between the composite anchor rod 31 and the composite cable 32 in the prestressed composite anchor 3 through the anchor 323 to complete the connection between the composite anchor rod 31 and the composite cable 32.

[0048] Further, perform the construction of the anchor beam turning anchor rod 10. The anchor beam turning anchor rod 10 is mechanically connected to the anchor beam 4, and the included angle θ between the anchor beam turning anchor rod 10 and the anchor beam 4 is not greater than 90°.

[0049] Further, install the anchor beam 4 that has not been injected with anti-rust mortar 44. The anchor beam anchor sections 42 of the anchor beam 4 are respectively mechanically connected to the anchor beam main cable 2 and the anchor beam turning anchor rod 10. The anchor beam free section 41 is connected to the prestressed composite anchor 3 through the embedded anchor beam anchor rod connector 33, and is mechanically connected to the middle cable 5, the single cable 7, and the anchor beam turning anchor rod 10. The anchor beams 4 are arranged in a transverse or longitudinal cross pattern on the slope. At the intersection position of every two anchor beams 4, there is a middle cable 5, a prestressed composite anchor 3, a single cable 7, or an anchor beam turning anchor rod 10.

[0050] The curve of the anchor beam 4 near the anchor beam turning anchor rod 10 is a convex curve, and the curve of the anchor beam 4 near the middle cable 5 and the single cable 7 is a concave curve.

[0051] Further, perform secondary tensioning on the anchor beam main cable 2, the middle cable 5, and the single cable 7 near the ground surface according to the design requirements, and further apply the cable tension of the anchor beam main cable 2, the middle cable 5, and the single cable 7 to the prestressed composite anchor 3 and the anchor beam turning anchor rod 10. Through the frictional force and bearing force of the prestressed composite anchor 3 and the anchor beam turning anchor rod 10 on the surrounding soil, further transfer the cable tension to the soil near the ground surface 6 to achieve the anchoring effect.

[0052] Further, install the flexible wire mesh grid 1. The edge support rope 11 is connected to the adjacent prestressed composite anchor 3. The landslide thrust of the slope 6 towards the free face is transmitted to the edge prestressed composite anchor 3, the single cable 7, and the anchor beam turning anchor rod 10 through the edge support rope 11. Further, the prestressed composite anchor 3, the single cable 7, and the anchor beam turning anchor rod 10 transfer the force to the anchor beam 4, and the anchor beam 4 further transfers the force to the middle cable 5 and the anchor beam main cable 2 respectively. The anchoring forces of the anchor beam main cable 2 and the middle cable 5 into the slope body achieve the anchoring effect.

[0053] Further, anti-rust mortar 44 is applied inside the casing 43 of the anchor beam 4.

[0054] Finally, anti-rust protection treatment is carried out on each connection joint of the anchor beam 4, the prestressed composite anchor 3, the middle anchor cable 5, the anchor beam turning anchor 10 and the main anchor cable 2 of the anchor beam.

[0055] Embodiment 2

[0056] As Figure 7 shown, an embodiment of a flexible slope support structure for anchoring in a long strip landslide and on stable mountain bodies on both sides of the landslide;

[0057] Only the anchor beam 4 with a horizontally downward concave bend is arranged, and both ends of the anchor beam 4 are on the stable mountain body, and are connected to the stable mountain body 63 through the main anchor cable 2 of the anchor beam and the anchor beam turning anchor 10. Other structures and implementation steps are the same as those in Embodiment 1.

[0058] Embodiment 3

[0059] As Figure 8 shown, an embodiment of a flexible slope support structure for the treatment of diseases in the protection of a cut slope excavated manually;

[0060] The anchor beam 4 is arranged through the stable mountain bodies on both sides and behind the excavated slope. The shape of the anchor beam 4 is a downward concave curve. The boundary of the cut slope excavation surface is regarded as the landslide boundary 61. The anchor beam anchoring sections 42 at both ends of the anchor beam 4 are connected to the stable mountain bodies 63 above and on both sides through the main anchor cable 2 of the anchor beam and the anchor beam turning anchor 10. Other structures and implementation steps are the same as those in Embodiment 1.

[0061] Embodiment 4

[0062] As Figure 9 shown, an embodiment of a flexible slope support structure for the treatment of diseases in the protection of a cut slope excavated manually;

[0063] The anchor beam 4 is arranged through the stable mountain bodies on both sides and behind the excavated slope. The shape of the anchor beam 4 is a crisscross straight line. The boundary of the cut slope excavation surface is regarded as the landslide boundary 61. The anchor beam anchoring sections 42 at both ends of the anchor beam 4 are connected to the stable mountain bodies 63 above and on both sides through the main anchor cable 2 of the anchor beam and the anchor beam turning anchor 10. Other structures and implementation steps are the same as those in Embodiment 1.

[0064] By implementing a flexible slope support structure in stages, a support scheme is provided for the slope, which improves the overall stability of the slope body while avoiding the damage of the landslide body to the engineering anchor cable structure, effectively eliminates the harm caused by the corrosion and failure of the anchor cable near the slip surface, speeds up the construction progress, reduces the construction period, lowers the project cost, increases the reliability of the structure, and at the same time provides an important basis for slope greening and environmental friendliness.

Claims

1. A flexible slope support structure, comprising a flexible wire mesh grid (1), a main anchor cable of the anchor beam (2), a prestressed composite anchor (3), a composite anchor rod (31), a composite anchor cable (32), a free section (321) of the composite anchor cable (32), an anchored section (322) of the composite anchor cable, an anchor fitting (323), an anchor beam - anchor rod connecting piece (33), an anchor beam (4), a free section (41) of the anchor beam, an anchored section (42) of the anchor beam, a casing (43), an anti - rust mortar (44), a prestressed tendon (45), a middle anchor cable (5), an external anchored section (51) of the prestressed anchor cable, a transition section (511), a reinforcing rib (512), an anchored section (52) of the prestressed anchor cable, a free section (53) of the prestressed anchor cable, a transition section (511) of the external anchored section (51) of the prestressed anchor cable, a slope surface (6), a landslide boundary (61), a landslide slope body (62), a stable mountain body (63), a single anchor cable (7), an anchored section (71) of the single anchor cable, a free section (72) of the single anchor cable, an anchor beam turning anchor rod (10), an edge support rope (11), a landslide body sliding surface (12). It is characterized in that: The part of the anchor beam (4) fixed on the landslide slope body (62) within the landslide boundary (61) is the free section (41) of the anchor beam, and the part of the anchor beam (4) fixed outside the landslide boundary (61) is the anchored section (42) of the anchor beam. Among them, the anchored section (42) of the anchor beam is anchored and connected to the stable mountain body (63) through the main anchor cable of the anchor beam (2), and the free section (41) of the anchor beam is fixed on the landslide slope body (62) through the prestressed composite anchor (3), the middle anchor cable (5), the single anchor cable (7) and the anchor beam turning anchor rod (10). One or more bundles of main anchor cables of the anchor beam (2) are distributed on the anchored section (42) of the anchor beam (4), and the anchor beam turning anchor rod (10) is arranged adjacent to the main anchor cable of the anchor beam (2). One or more composite anchors (3) are distributed on the free section (41) of the anchor beam, and several middle anchor cables (5) and single anchor cables (7) are arranged adjacent to the prestressed composite anchor (3). Zero or more anchor beam turning anchor rods (10) are arranged adjacent to the middle anchor cable (5) and the single anchor cable (7). The anchor beam (4) is mechanically connected to the main anchor cable of the anchor beam (2), the anchor beam turning anchor rod (10), the prestressed composite anchor (3), the middle anchor cable (5) and the single anchor cable (7). The center of the anchor beam (4) is equipped with a prestressed tendon (45), the prestressed tendon (45) is wrapped with an anti - rust mortar (44), and the outside of the anti - rust mortar (44) is a casing (43). The anchor beams (4) are arranged cross - wise or longitudinally on the slope, and a middle anchor cable (5), a prestressed composite anchor (3), an anchor beam turning anchor rod (10) or a single anchor cable (7) is arranged at the intersection of every two anchor beams (4). The curve of the anchor beam (4) near the anchor beam turning anchor rod (10) is a convex curve, and the curve of the anchor beam (4) near the middle anchor cable (5) and the single anchor cable (7) is a concave curve. The flexible wire mesh grid (1) is laid on the slope surface (6), the flexible wire mesh grid (1) is connected to the edge support rope (11), the edge support rope (11) is mechanically connected to the prestressed composite anchor (3), the anchor beam steering anchor rod (10) and the single anchor cable (7).

2. A flexible slope support structure as claimed in claim 1, Features The ends of the anchor beam main anchor cable (2) and the middle anchor cable (5) farthest from the ground surface are the prestressed anchor cable anchoring section (52), the middle section is the prestressed anchor cable free section (53), and the prestressed anchor cable outer anchor section (51) close to the ground surface is provided with a transition section (511) between the prestressed anchor cable free section (53) and the prestressed anchor cable outer anchor section (51), and the part of the prestressed anchor cable outer anchor section (51) close to the ground surface is provided with reinforcing ribs (512); the anchor beam main anchor cable (2) is arranged in a stable mountain body (63), and the middle anchor cable (5) is arranged on a landslide slope body (62) within a landslide boundary (61).

3. A flexible slope support structure as claimed in claim 1, Features The prestressed anchor cable anchoring section (52) of the middle anchor cable (5) is connected above and below the sliding surface (12) of the landslide body, the lower end of the prestressed anchor cable anchoring section (52) is below the sliding surface (12) of the landslide body, and the upper end of the prestressed anchor cable anchoring section (52) is above the sliding surface (12) of the landslide body and is located in the landslide body (62).

4. A flexible slope support structure as claimed in claim 1, Features The prestressed composite anchor (3) is composed of one or more composite anchor rods (31) and one or more composite anchor cables (32). The composite anchor rod (31) and the composite anchor cable (32) are fixed near the upper end of the composite anchor rod (31) by an anchor (323) arranged at the top of the free section (321) of the composite anchor cable (32). The upper end of the composite anchor rod (31) is provided with an anchor beam anchor rod connector (33). The angle between any composite anchor rod (31) and the composite anchor cable (32) on the same prestressed composite anchor (3) is а, and satisfies 30°≤а≤180°. The composite anchor (3) and the anchor beam (4) are connected together at the anchor beam free section (41) by the anchor beam anchor rod connector (33). The composite anchor cable (32) is composed of an anchor (323), a free section (321), and a composite anchor cable anchoring section (322) from top to bottom.

5. A flexible slope support structure as claimed in claim 1, Features The single anchor cable (7) is composed of a single anchor cable anchoring section (71) and a single anchor cable free section (72). The single anchor cable free section (72) and the anchor beam free section (41) are mechanically connected together. The single anchor cable (7) is arranged in the landslide body (62) within the landslide boundary (61) and above the landslide body sliding surface (12). A composite anchor (3) or an anchor beam steering anchor rod (10) is arranged adjacent to the single anchor cable (7).

6. A flexible slope support structure as claimed in claim 1, Features The anchor beam steering anchor rod (10) is mechanically connected to the anchor beam (4), and the angle θ between the anchor beam steering anchor rod (10) and the anchor beam (4) is not greater than 90°.

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