A tunnel-type anchor structure for a cable crane and its construction method

Abstract

The present invention discloses a tunnel-type anchor structure for a cable crane, which includes an anchor plug body, a cable anchor, and an anchoring beam for anchoring the cable. The anchor plug body includes an outer end located outside the tunnel and an inner end located inside the tunnel. The anchoring beam is fixed at the outer end of the anchor plug body. Part of the cable anchor is pre-buried in the anchor plug body, and one end of the cable anchor is anchored in the inner end of the anchor plug body. The other end of the cable anchor passes through the anchoring beam and the exposed part is anchored outside the anchoring beam. The present invention also discloses a construction method of the above-mentioned anchor structure, which includes steps such as excavating the tunnel, binding steel bars, installing the cable anchor and guy cables, pouring concrete, installing the anchor fittings, tensioning the cable anchor, and installing the cable. The present invention has the advantages of simple structure, good anchoring performance, safety and reliability, etc. It not only facilitates the removal of various cables in the later stage, but also improves the safety and convenience of the construction and application of the tunnel-type anchor structure of large cable cranes.

Description

Technical Field

[0001] The present invention belongs to the field of civil engineering, relates to the design and construction of large cable cranes, and particularly relates to a tunnel-type anchor structure for a cable crane and a construction method thereof. Background Art

[0002] Cable cranes are commonly used lifting and transportation machinery in the construction of long-span arch bridges. The anchor is an important load-bearing structure of the cable crane, and all kinds of cable forces of the cable crane need to be transmitted to the foundation through the anchor. The types of anchors include gravity type, tunnel type, rock anchor type, etc. Among them, the gravity-type anchor mainly relies on its own gravity to balance the cable force, with a simple structure and reliable force, but it has a large amount of concrete used and has a greater impact on the surrounding environment; the tunnel-type anchor forms an anchor plug body by excavating a tunnel in the rock mass and pouring concrete in the tunnel, and jointly acting with the surrounding rock mass to balance the cable force. The construction process is relatively complex, but the concrete consumption is low and the impact on the surrounding environment is small; the rock anchor type generally needs to set a concrete anchor wall, and after the anchor wall is anchored by prestressed anchor cables, the cables are then anchored to the anchor wall. Limited by the mechanical properties of the prestressed anchor cables, it is generally applicable to the case of small cable forces.

[0003] When building and using large cable cranes in mountainous areas, it is necessary to adapt to local conditions and adopt a suitable anchor structure according to the topography and engineering geological conditions. The tunnel-type anchor is widely used due to its low concrete consumption. In the existing tunnel-type anchor structures, there are mainly two ways to anchor the cables. One is that the cables are directly anchored inside the anchor plug body after turning through a spreader saddle; the other is to set anchors outside the anchor plug body, and the commonly used ones are double-screw adjustable anchors or fixed pulley group anchors, and the cable forces are transmitted to the anchor through the double-screw adjustable anchors or fixed pulley group anchors. Since the cable crane is generally a temporary structure, after the cable crane is used up, all kinds of cables need to be removed. Therefore, it is necessary to set anchors for cable force conversion to anchor the cables of the cable crane outside the anchor plug body. The existing anchors have a relatively complex structure, which is not convenient for the installation and disassembly of the cables, and generally only one main cable can be anchored by one set of anchors, which is not convenient for application in the anchor structure of large cable cranes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing technology and provide a tunnel-type anchor structure for a cable crane and a construction method thereof, which has a simple structure, is safe and reliable, is convenient for construction, can concentrate the anchoring of various cables, and is convenient for the later removal of the cables.

[0005] To solve the above technical problem, the technical solution proposed by the present invention is as follows:

[0006] A tunnel-type anchor structure for a cable crane, comprising an anchor plug body, a cable anchor and an anchor beam for anchoring the cable. The anchor plug body includes an outer end located outside the tunnel and an inner end located inside the tunnel. The anchor beam is fixed at the outer end of the anchor plug body. Part of the cable anchor is embedded in the anchor plug body, and one end of the cable anchor is anchored in the inner end of the anchor plug body. The other end of the cable anchor passes through the anchor beam and the exposed part is anchored outside the anchor beam.

[0007] For the above-mentioned tunnel-type anchor structure for a cable crane, preferably, the tunnel-type anchor structure further includes a base plate. One side of the base plate is provided with anchor bars, and the anchor bars are anchored in the anchor plug body. The other side of the base plate is provided with support stiffening plates, and the anchor beam is fixed on the support stiffening plates. The base plate is provided with a cable anchor hole for the cable anchor to pass through.

[0008] For the above-mentioned tunnel-type anchor structure for a cable crane, preferably, the support stiffening plates include a plurality of support stiffening plate groups arranged at intervals. Each support stiffening plate group includes two symmetrically arranged plates. The plates are provided with grooves for the anchor beam to be placed in. The cable anchor hole is arranged between two symmetrically arranged plates. The cable and the cable anchor are arranged alternately on the anchor beam.

[0009] For the above-mentioned tunnel-type anchor structure for a cable crane, preferably, multi-layered local bearing steel bar meshes are provided in the anchorage areas of the outer end and the inner end of the anchor plug body.

[0010] For the above-mentioned tunnel-type anchor structure for a cable crane, preferably, the anchor beam is filled with concrete. The anchor beam is provided with through holes, and lining pipes are arranged in the through holes. The cable anchor is arranged in the lining pipes.

[0011] For the above-mentioned tunnel-type anchor structure for a cable crane, preferably, the exposed part of the other end of the cable anchor is anchored outside the anchor beam through an anchor plate and is provided with a protective cover. An anchor backing plate is arranged between the anchor plate and the lining pipe.

[0012] For the above-mentioned tunnel-type anchor structure for a cable crane, preferably, the tunnel-type anchor structure further includes a guy cable. One end of the guy cable is anchored in the inner end of the anchor plug body. The other end of the guy cable directly passes out from the outer end of the anchor plug body and the exposed part extends to the top of the main tower of the cable crane.

[0013] For the above-mentioned tunnel-type anchor structure for a cable crane, preferably, the anchor plug body is filled with concrete, and the cross section of the anchor plug body is in a horseshoe shape. The anchor plug body includes a straight section, a transition section and an anchorage section for anchoring the cable anchor. The anchorage section is arranged inside the tunnel-type anchor structure, the straight section is arranged outside the tunnel-type anchor structure, and the transition section is arranged between the anchorage section and the straight section.

[0014] For the above-mentioned tunnel-type anchor structure for a cable crane, preferably, the inclination angle of the axis of the anchor plug body is the same as the inclination angle of the cable.

[0015] As a general inventive concept, the present invention also provides a construction method for the above-mentioned tunnel-type anchor structure for a cable crane, comprising the following steps:

[0016] S1: Excavate the tunnel. First, treat the tunnel entrance, and then excavate the tunnel body while doing support work during excavation.

[0017] S2: Bind the steel bars. After the excavation of the tunnel body is completed, bind the steel bars so that the steel bar mesh is close to the surrounding rock.

[0018] S3: Install the anchor cables and guy cables. After the steel bars are bound, install the fixed-end anchor plates of the anchor cables and guy cables on the inner side of the tunnel, and embed the prestressed steel strands.

[0019] S4: Pour the concrete. Install the formwork on the outer end face of the anchor plug body, and install the base plate, and then pour the concrete into the anchor plug body.

[0020] S5: Install the anchor fittings and tension the anchor cables. After the concrete of the anchor plug body reaches the design strength, install the support stiffening plates, and then install the anchor beam. After all installations are completed, tension the prestressed steel strands of the anchor cables.

[0021] S6: Install the cables: After the construction of the anchor structure is completed, anchor and install the cables of the cable crane on the anchor beam.

[0022] Compared with the prior art, the advantages of the present invention are as follows:

[0023] The anchor structure of the present invention uses an anchor beam for cable force conversion, and has the advantages of simple structure, safety and reliability, good anchoring performance, etc. One end of the anchor cable is anchored on the inner side of the tunnel, and the other end passes through the anchor beam and the exposed part is anchored on the outside of the anchor beam. All kinds of cables such as the main cable, towing cable, and lifting cable of the cable crane except the guy cable can be centrally anchored on the anchor beam. The number of cables that can be anchored is large, and it is convenient for the removal of various cables in the later stage. The cables and anchor cables can be arranged alternately on the anchor beam, so that the anchoring force of the anchor cable and the cable force of the cable are balanced with each other, improving the safety and convenience of the construction and application of the tunnel-type anchor structure of the cable crane. It can be adjusted according to local conditions, set appropriate inclination angles according to the topographic and geomorphic conditions, give full play to the stress performance of the mountain body, save the amount of concrete used, and reduce the construction cost. It is especially suitable for large cable cranes.

[0024] The construction method of the present invention can construct the anchor structure according to the working performance requirements of the cable crane and the on-site topographic and geomorphic and engineering geological conditions, and obtain a tunnel-type anchor structure applicable to large cable cranes. Description of the Drawings

[0025] Figure 1 It is a schematic side elevation view of the anchor structure of the embodiment.

[0026] Figure 2 It is a schematic three-dimensional structure view of the anchor structure of the embodiment.

[0027] Figure 3 It is a schematic three-dimensional structure view of the base plate, anchor bars and support stiffening plates in the embodiment.

[0028] Figure 4 It is a schematic three-dimensional structure view of the anchoring beam in the embodiment.

[0029] Figure 5 It is a schematic three-dimensional structure view of the inner lining pipe, anchor backing plate and anchor plate in the embodiment.

[0030] Legend:

[0031] 1. Anchor plug body; 1-1. Straight section; 1-2. Gradual change section; 1-3. Anchoring section; 1-4. Outer end; 1-5. Inner end; 2. Base plate; 2-1. Cable anchor hole; 3. Anchoring beam; 3-1. Through hole; 4. Anchor plate; 5. Anchor backing plate; 6. Cable anchor; 7. Guy cable; 8. Anchor bar; 9. Support stiffening plate; 10. Cable; 11. Inner lining pipe; 12. Sealing end plate; 13. Protective cover. Detailed implementation manners

[0032] For the convenience of understanding the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings of the specification and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0033] A large cable crane is a commonly used aerial transportation equipment in arch bridge construction. The anchor is an important load-bearing structure of the cable crane, and all kinds of cable forces of the cable crane need to be transmitted to the foundation through the anchor. Among them, when the topographic and geomorphic conditions and engineering geological conditions at the bridge site are suitable, the application of a tunnel-type anchor can not only greatly save the consumption of concrete, but also have less exposed parts and little impact on the environment. This embodiment provides a tunnel-type anchor structure for a large cable crane.

[0034] As Figure 1 and Figure 2 shown, the tunnel-type anchor structure for a cable crane in this embodiment specifically includes an anchor plug body 1, a base plate 2, an anchoring beam 3, an anchor plate 4, an anchor backing plate 5, a cable anchor 6 and a pre-embedded guy cable 7.

[0035] In this embodiment, the anchor plug body 1 includes an outer end head 1-4 located outside the tunnel and an inner end head 1-5 located inside the tunnel. The anchoring beam 3 is fixed at the outer end head 1-4 of the anchor plug body 1. Specifically, the anchoring beam 3 is fixed on the anchor plug body 1 through the base plate 2 and the support stiffening plate 9. Part of the cable 6 is embedded in the anchor plug body 1, and one end of the cable 6 is anchored in the inner end head 1-5 of the anchor plug body 1. The other end of the cable 6 passes through the anchoring beam 3 and the exposed part is anchored outside the anchoring beam 3. The cable 10 is anchored on the anchoring beam 3. As can be seen from Figure 1 , two groups of parallel anchoring beams 3 are fixed at the outer end head 1-4 of the anchor plug body 1, and two strands of cables 6 corresponding to the two groups of anchoring beams 3 are also provided at the inner end head 1-5 of the anchor plug body 1 and inside the anchor plug body 1. Specifically, the cable 6 is s 15.24 prestressed steel strand. A single cable 6 uses 8-φ s 15.24 steel strands. The cable 6 adopts a single-end tensioning method, and a P-type extrusion anchor is used inside. One end of the cable 6 is anchored in the anchoring section 1-3 of the anchor plug body 1. The embedded section of the cable 6 is sleeved with a PVC sleeve for convenient later tensioning. After the cable 6 is tensioned in the exposed section, it is anchored outside the anchoring beam 3 through the anchor plate 4. This anchor structure is simple and safe. All types of cables 10 such as the main cable, towing cable, and lifting cable of the cable crane except the guy cable 7 can be centrally anchored on the anchoring beam 3. After passing the cable 10 through the anchoring beam 3, it is then tied and fixed with a shackle to wind the cable 10 around the anchoring beam 3. The number of cables 10 that can be anchored at one time is large. When the cable 10 is removed, only the shackle needs to be released and then slowly released with a winch, which is convenient for the later removal of various cables 10, improves the convenience of construction and application, can be adapted to local conditions, set an appropriate inclination angle according to the topographic and geomorphic conditions, give full play to the stress performance of the mountain body, save the amount of concrete used, and reduce the construction cost. It is especially suitable for large cable cranes.

[0036] In this embodiment, the anchor plug body 1 is filled with concrete, and the cross-section of the anchor plug body 1 is horseshoe-shaped. The anchor plug body 1 includes a straight section 1-1, a transition section 1-2, and an anchoring section 1-3 for anchoring the cable 6. The anchoring section 1-3 is arranged inside the tunnel-type anchor structure, the straight section 1-1 is arranged outside the tunnel-type anchor structure, and the transition section 1-2 is arranged between the anchoring section 1-3 and the straight section 1-1. Considering the bearing capacity and the stability of the mountain body, the anchor plug body 1 adopts a three-section structure. The main function of the anchor plug body 1 is anti-pulling, and its anti-pulling bearing capacity is mainly composed of the peripheral adhesion and friction force of the straight section 1-1, the normal pressure of the transition section 1-2, and its own weight. To ensure the stability of the mountain body, the buried depth of the transition section 1-2 cannot be too shallow. To prevent the destruction of the structure of the anchor plug body 1 itself, the slope ratio of the transition section 1-2 of the anchor plug body 1 cannot be too large. The innermost anchoring section 1-3 can provide anti-pulling bearing capacity on the one hand and also provide an anchoring space for the cable, which is convenient for workers to operate inside the cave. Specifically, the anchor plug body 1 is a reinforced concrete structure, the concrete strength grade is C30, and the anchor plug body 1 can be divided into three sections according to its elevation profile: the straight section 1-1, the transition section 1-2, and the anchoring section 1-3. The transition section 1-2 diffuses evenly in all directions to play a role of gradual transition. Its outer contour size gradually shrinks from the inside to the outside of the tunnel to realize the transition of the cross-section contour from the horseshoe-shaped anchoring section 1-3 to the rectangular straight section 1-1. Specifically, for the cable crane with a rated lifting capacity of 150t, the cable force of its main cable reaches more than a thousand tons. The total length of the anchor plug body 1 is 46m, the length of the straight section 1-1 is 40.0m, the length of the transition section 1-2 is 5.0m, the length of the anchoring section 1-3 is 1.0m, the inclination angle with the horizontal plane is 36.8°, the height of the cross-section of the straight section 1-1 is 2.0m, and the width is 2.0m. The height of the cross-section of the anchoring section 1-3 is 7.0m, and the width is 7.0m.

[0037] In this embodiment, the inclination angle of the axis of the anchor plug body 1 is the same as the inclination angle of the cable 10 to ensure that the stress direction of the anchor plug body 1 is consistent with the direction of the cable 10, which can prevent the anchor plug body 1 from being bent and damaged or even broken due to bending, or causing the instability of the cave wall.

[0038] As Figure 3As shown in the figure, in this embodiment, in order to fix the anchoring beam 3 to the outer end 1-4 of the anchor plug body 1, structures such as a base plate 2 and a support stiffening plate 9 are provided. One side of the base plate 2 is provided with anchor bars 8, and the anchor bars 8 are anchored in the anchor plug body 1. Through the anchoring action of the anchor bars 8, a firm connection between the base plate 2 and the anchor plug body 1 is achieved. The other side of the base plate 2 is provided with a support stiffening plate 9, and the anchoring beam 3 is welded to the support stiffening plate 9. The support stiffening plate 9 plays a role in supporting and connecting the anchoring beam 3, and at the same time increases the gap between the base plate 2 and the anchoring beam 3, facilitating the cable 10 to pass through the gap. The base plate 2 is provided with a cable hole 2-1 for the cable 6 to pass through, and the cable 6 passes out from the cable hole 2-1. Specifically, the base plate 2 is cut from a steel plate with a thickness of 12 mm, the anchor bars 8 are made of φ20 mm steel bars, each with a length of 65 cm, and the support stiffening plate 9 is cut from a steel plate with a thickness of 30 mm.

[0039] In this embodiment, the support stiffening plate 9 includes a plurality of support stiffening plate groups arranged at intervals. Each support stiffening plate group includes two symmetrically arranged plates. The plates are provided with grooves for the anchoring beam 3 to be placed in. The cable hole 2-1 is arranged between two symmetrically arranged plates. The cable 10 and the cable 6 are arranged alternately on the anchoring beam 3. The support stiffening plate groups arranged at intervals can perform lateral limit on the cable 10, which is not only convenient for the operation during cable threading, but also can prevent the cable 10 from sliding left and right, facilitating the anchoring of various cables 10 of the cable crane to the anchoring beam 3. The groove structure on the plate is convenient for the anchoring beam 3 to be embedded, resulting in a larger contact surface and more firm support and fixation. By optimizing the position of the cable hole 2-1, the external cable 10 and the internal cable 6 can be arranged alternately on the anchoring beam 3, enabling the anchoring force of the cable 6 and the cable force of the cable 10 to be balanced with each other.

[0040] In this embodiment, multi-layered local bearing steel bar meshes are provided in the anchoring areas of the outer end 1-4 and the inner end 1-5 of the anchor plug body 1 to prevent local compression failure of the concrete. Specifically, 4 to 5 layers of local bearing steel bar meshes are provided in this embodiment. The bearing steel bar meshes are made of φ12 mm steel bars, and the grid size is 10 cm×10 cm.

[0041] As Figure 4As shown in the figure, in this embodiment, the anchorage beam 3 is filled with concrete. There is a through hole 3-1 on the anchorage beam 3, and an inner lining pipe 11 is inserted through the through hole 3-1. The cable anchor 6 is arranged in the inner lining pipe 11. The inner lining pipe 11 separates the cable anchor 6 from the concrete poured in the anchorage beam 3, facilitating the cable anchor 6 to pass through the anchorage beam 3 and be tensioned. Specifically, the anchorage beam 3 is a concrete-filled steel tube member. The steel tube adopts a φ630×20mm straight-seam steel tube, and the strength grade of the internally filled concrete is C30. The through hole 3-1 is a circular hole with a diameter of 115mm. The inner lining pipe 11 is inserted into the circular hole, and the inner lining pipe 11 is welded to the anchorage beam 3. The outer end of the inner lining pipe 11 does not extend out of the anchorage beam 3, and the inner end of the inner lining pipe 11 extends out 5 cm. The inner lining pipe 11 adopts a φ110×5mm seamless steel tube. Sealing end plates 12 are arranged at both ends of the anchorage beam 3, and the sealing end plates 12 are cut from steel plates with a thickness of 8mm to 10mm.

[0042] As Figure 5 shown in the figure, in this embodiment, the exposed part at the other end of the cable anchor 6 is anchored to the outside of the anchorage beam 3 through an anchor plate 4 and is provided with a protective cover 13. An anchor backing plate 5 is arranged between the anchor plate 4 and the inner lining pipe 11. Since the cable crane has a long service life, to prevent the exposed part of the cable anchor 6 from rusting, a galvanized steel tube protective cover is arranged on the exposed section of the cable anchor 6. The anchor backing plate 5 is welded to the anchorage beam 3. The anchor backing plate 5 can disperse the strong concentrated force of the anchor plate 4 and transfer the anchoring force of the cable anchor 6 to the anchorage beam 3, and at the same time facilitate the connection with other components under the anchor. Specifically, the anchor backing plate 5 is cut from a steel plate with a thickness of 20mm.

[0043] In this embodiment, the tunnel-type anchor structure further includes a guy cable 7. One end of the guy cable 7 is anchored in the inner end 1-5 of the anchor plug body 1, and the other end of the guy cable 7 directly passes out from the outer end 1-4 of the anchor plug body 1 and the exposed part extends to the top of the main tower of the cable crane. Specifically, the guy cable 7 is s 15.24 prestressed steel strands. A single guy cable 7 adopts 6-φ s 15.24 steel strands. The guy cable 7 adopts a single-end tensioning method, and a P-type extrusion anchor is used inside. One end is anchored in the anchorage section 1-3 of the anchor plug body 1. A PVC sleeve is sleeved outside the embedded section of the guy cable 7 to facilitate subsequent tensioning.

[0044] The construction method of the tunnel-type anchor structure in this embodiment is as follows: First, according to the working performance requirements of the cable crane and the on-site topography, geomorphic features, and engineering geological conditions, the specific dimensions are designed, and then the construction is carried out according to the following steps:

[0045] S1: Excavate the tunnel; First, process the tunnel entrance. Before excavating the tunnel body, use an excavator to dig a construction platform at the tunnel entrance, excavate a catchment ditch at the top of the tunnel entrance, and excavate a drainage ditch in front of the tunnel. At the same time, complete the support of the tunnel entrance; Then, excavate the tunnel body, and carry out support while excavating. For the soil part of the tunnel body, manual excavation is adopted. For the rock layer part, manual drilling and short-hole blasting are used. Excavate from both ends to the middle, and use a winch to tow a trolley to transport the muck. During the excavation of the tunnel body, closely observe the deformation of the surrounding rock, review the angle and cross-sectional dimensions of the tunnel body, and correct any deviations in a timely manner. Carry out support while excavating. The support for the tunnel body uses a steel pipe scaffold with a diameter of φ48×3.0mm, and a 3mm-thick steel plate is laid on the top;

[0046] S3: Bind steel bars. After the excavation of the tunnel body is completed, remove the floating soil and loose stones on the rock wall, and bind the steel bars so that the steel bar mesh is close to the surrounding rock, leaving a 6cm protective layer thickness;

[0047] S3: Install the anchor cable 6 and pre-bury the guy cable 7. After the steel bars are bound, install the inner fixed-end anchor plates of the anchor cable 6 and the guy cable 7 on the inner side of the tunnel, and pre-bury the prestressed steel strands. The steel strands are sheathed with PVC pipes for easy tensioning in the later stage;

[0048] S4: Pour concrete. Install the formwork on the outer end face of the anchor plug body 1, and install the base plate 2. Then, pour C30 self-compacting concrete into the anchor plug body 1;

[0049] S5: Install the anchor fittings and tension the anchor cable. After the concrete of the anchor plug body 1 is cured for 7 days and reaches the design strength, install components such as the support stiffening plate 9, the concrete-filled steel tube anchoring beam 3, the anchor backing plate 5, and the inner liner tube 11 in sequence. After all installations and inspections are completed, carry out the tensioning of the prestressed steel strands of the anchor cable 6;

[0050] S6: Install the cable 10: After the construction of the anchor block structure is completed and passes the acceptance, anchor and install the cable 10 of the cable crane on the anchoring beam 3.

[0051] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A tunnel-type anchor structure for a cable crane, characterized in that: It includes an anchor plug body (1), a cable anchor (6), and an anchor beam (3) for anchoring a cable (10). The anchor plug body (1) includes an outer end (1-4) located outside the tunnel and an inner end (1-5) located inside the tunnel. The anchor beam (3) is fixed at the outer end (1-4) of the anchor plug body (1). Part of the cable anchor (6) is pre-embedded in the anchor plug body (1), and one end of the cable anchor (6) is anchored in the inner end (1-5) of the anchor plug body (1). The other end of the cable anchor (6) passes through the anchor beam (3), and the exposed part is anchored outside the anchor beam (3); The tunnel-type anchor structure further includes a base plate (2). One side of the base plate (2) is provided with anchor bars (8), and the anchor bars (8) are anchored in the anchor plug body (1). The other side of the base plate (2) is provided with a support stiffening plate (9), and the anchor beam (3) is fixed on the support stiffening plate (9). The base plate (2) is provided with a cable anchor hole (2-1) for the cable anchor (6) to pass through; The support stiffening plate (9) includes multiple groups of support stiffening plates arranged at intervals. Each group of support stiffening plates includes two symmetrically arranged plates. The plates are provided with grooves for the anchor beam (3) to be placed in. The cable anchor hole (2-1) is arranged between two symmetrically arranged plates. The cable (10) and the cable anchor (6) are arranged alternately on the anchor beam (3); Multi-layered local bearing steel bar meshes are provided in the anchoring areas of the outer end (1-4) and the inner end (1-5) of the anchor plug body (1).

2. The tunnel-type anchor structure for a cable crane according to claim 1, wherein: The anchor beam (3) is filled with concrete. The anchor beam (3) is provided with a through hole (3-1), and a lining pipe (11) is inserted into the through hole (3-1). The cable anchor (6) is arranged in the lining pipe (11).

3. The tunnel-type anchor structure for a cable crane according to claim 2, wherein: The exposed part of the other end of the cable anchor (6) is anchored outside the anchor beam (3) through an anchor plate (4) and is provided with a protective cover (13). An anchor backing plate (5) is arranged between the anchor plate (4) and the lining pipe (11).

4. The tunnel-type anchor structure for a cable crane according to any one of claims 1 to 3, characterized in that: The anchor plug body (1) is filled with concrete, and the cross-section of the anchor plug body (1) is in a horseshoe shape. The anchor plug body (1) includes a straight section (1-1), a transition section (1-2), and an anchoring section (1-3) for anchoring the cable anchor (6). The anchoring section (1-3) is arranged inside the tunnel-type anchor structure, the straight section (1-1) is arranged outside the tunnel-type anchor structure, and the transition section (1-2) is arranged between the anchoring section (1-3) and the straight section (1-1).

5. The tunnel-type anchor structure for a cable crane according to any one of claims 1 to 3, characterized in that: The inclination angle of the axis of the anchor plug body (1) is the same as the inclination angle of the cable (10).

6. A construction method for a tunnel-type anchor structure for a cable crane as described in any one of claims 1 to 5, characterized in that: It includes the following steps S1: Excavate the tunnel. First, treat the tunnel entrance, and then excavate the tunnel body, and carry out support while excavating; S2: Bind steel bars. After the excavation of the tunnel body is completed, bind the steel bars to make the steel bar mesh close to the surrounding rock; S3: Install the cable anchor (6) and the guy cable (7). After the steel bars are bound, install the fixed-end anchor plates of the cable anchor (6) and the guy cable (7) on the inner side of the tunnel, and pre-embed the prestressed steel strands; S4: Pour concrete, install formwork on the outer end face of the anchor plug body (1), install the base plate (2), and then pour concrete into the anchor plug body (1); S5: Install the anchor and tension the cable (6). After the concrete of the anchor plug body (1) reaches the design strength, install the support stiffening plate (9), then install the anchor beam (3). After all installations are completed, tension the prestressed steel strand of the cable (6); S6: Install the cable (10): After the construction of the anchor structure is completed, anchor and install the cable (10) of the cable crane on the anchor beam (3).

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