CN219137776U - Pulling-pressing composite anti-floating anchoring structure applied to weathered granite region - Google Patents

Abstract

The utility model relates to the technical field of building construction, and discloses a tension-compression composite anti-floating anchor structure applied to a weathered granite region. According to the utility model, the expansion head is designed at the top end of the anchor hole, so that the contact area of the grouting body and surrounding rock-soil body can be greatly increased, the anti-pulling bearing capacity of the anti-floating anchor rod is greatly increased, the small anti-floating pile is combined with the anti-floating anchor rod, the arrangement density of the anti-floating anchor rod can be reduced, meanwhile, the anchor rod body is made of steel strands, the construction cost is reduced, the construction process is simple, the construction efficiency is extremely high, more tension cracks are effectively avoided due to the fact that all grouting bodies are in tension state during the working of the anti-floating anchor rod, and the corrosion resistance of the anti-floating anchor rod body is enhanced.

Description

Pulling-pressing composite anti-floating anchoring structure applied to weathered granite region

Technical Field

The utility model relates to the technical field of building construction, in particular to a tension-compression composite anti-floating anchoring structure applied to a weathered granite region.

Background

For the soil layer anti-floating anchor rod, the geometric shape of an anchor hole is often changed by using a variable cross-section process in the prior art, such as spraying clean water to the hole bottom by using a high-pressure rotary jet drill or enlarging the hole bottom by using a special reaming drill bit, so that a variable cross-section anchor hole with the hole bottom diameter far higher than that of a hole body is formed, and the enlarged head anti-floating anchor rod is formed by grouting, so that the end bearing capacity of the anchor rod is increased, and finally, the ultimate anti-pulling bearing capacity of the anchor rod is increased. However, in a weathered granite area, the end part of the anti-floating anchor rod is generally medium weathered-breezed granite, the lithology intensity is high, the reaming efficiency of a variable cross-section process is very low, and the geometric shape of the bottom of the anchor hole is difficult to change, so that the method is not suitable for improving the ultimate anti-pulling bearing capacity of the anti-floating anchor rod in the weathered granite area by changing the cross-section process of the bottom of the anchor hole.

At present, the prestress anti-floating anchor rod is generally divided into a tension anti-floating anchor rod and a pressure anti-floating anchor rod, but the two anti-floating anchor rods are uneven in stress, the anchoring force of the tension anti-floating anchor rod gradually decays from the front end of an anchoring section to the tail end of the anchoring section, and the anchoring force is distributed in an inverted triangle; the anchoring force of the pressure type anti-floating anchor rod gradually decays from the tail end of the anchoring section to the front end of the anchoring section, and the anchoring force is distributed in a triangle shape. If the length of the anchoring section of the two anti-floating anchors is too long, the attenuated anchoring force is necessarily too small, so that the stratum anchoring force of a quite long section of anchoring section cannot be exerted.

And the compression performance of the grouting body of the anti-floating anchor rod is far better than the tension performance of the grouting body, the tensile strength of the grouting body is very small for a tensile anti-floating anchor rod, and tension cracks are very easy to occur during working, and underground water permeates into the anchor rod through the cracks, so that the long-term corrosion resistance of the anchor rod body is poor. Aiming at the situation that the ultimate anti-floating bearing capacity of an anti-floating anchor rod and the stress of a tension or pressure type prestress anti-floating anchor rod are uneven in the weather granite region, the utility model provides a tension and compression composite anti-floating anchor structure applied to the weather granite region.

Disclosure of Invention

The utility model aims to provide a pull-press composite anti-floating anchor structure for a weathered granite region, and aims to solve the problems that the ultimate anti-floating anchor rod bearing capacity is improved by a method that the geometric shape of the end part of an anchor hole is difficult to change by a variable cross-section process in the weathered granite region, and the stress of the anchor rod is uneven in both tension type or pressure type prestress anti-floating anchor rods.

The utility model is realized in such a way that the tension-compression composite anti-floating anchor structure applied to a weathered granite area comprises a reinforcement cage body and a spiral stirrup arranged on the outer side surface of the reinforcement cage body, wherein the spiral stirrup has integral continuous characteristics and is used for improving the bearing capacity and the anti-damage capacity of an enlarged head component at the upper part of an anchor hole, the inner wall of the reinforcement cage body is provided with a prestress tension structure, and the prestress tension structure is used for serving as a grouting frame at the outer side of the reinforcement cage body and improving the protection performance;

the top surface mounting of steel reinforcement cage body has waterproof construction, waterproof construction is used for reinforcing anti-floating anchor body of rod corrosion resistance, the internally mounted of steel reinforcement cage body has anchor rope tensioning mechanism, anchor rope tensioning mechanism is used for reinforcing the holistic ultimate anti-pulling bearing capacity of structure.

As a preferable technical scheme of the utility model, the prestress tensioning structure comprises a prestress anchor cable and a guide cap, wherein the guide cap is arranged on the bottom end surface of the prestress anchor cable, two wire-setting rings are arranged on the outer side surface of the prestress anchor cable, and a wire binding ring is arranged on the outer side surface of the prestress anchor cable between the two wire-setting rings.

As a preferable technical scheme of the utility model, the prestressed anchor cable comprises an anchor cable free section and an anchoring section, wherein the anchor cable free section is connected with the anchoring section, a bearing plate is arranged at the joint of the anchor cable free section and the anchoring section, and the bearing plate is of an annular structure.

As a preferable technical scheme of the utility model, the waterproof structure comprises a PVC pipe and a waterproof component, wherein the PVC pipe is sleeved on the top end surface of the prestressed anchor cable, and the waterproof component is arranged on the top end surface of the reinforcement cage body.

As a preferable technical scheme of the utility model, the waterproof assembly comprises a cushion layer and a flexible waterproof layer, wherein the cushion layer is arranged on the outer side surface of the reinforcement cage body, the flexible waterproof layer is arranged on the top end surface of the cushion layer, and the top end surface of the flexible waterproof layer is sequentially paved with modified asphalt waterproof ointment, modified asphalt waterproof coiled materials, waterproof coating, expansion water stop strips and water stop steel plates from bottom to top.

As a preferable technical scheme of the utility model, the anchor cable tensioning mechanism comprises a jack and a tensioning assembly, wherein the tensioning assembly is arranged on the top surface of the PVC pipe, and the jack is arranged on the top surface of the tensioning assembly.

As a preferable technical scheme of the utility model, the tensioning assembly comprises an anchor backing plate and a limiting plate, wherein the bottom end surface of the anchor backing plate is provided with a foundation raft, the limiting plate is arranged on the top end surface of the anchor backing plate, the jack is arranged on the top end surface of the limiting plate, and the top end surface of the jack is provided with a tool anchor.

Compared with the prior art _， The utility model provides a tension-compression composite anti-floating anchoring structure applied to a weathered granite area, wherein the top end of an anchor hole is provided with an expansion head, so that the contact area of a grouting body and surrounding rock-soil bodies can be greatly increased, the friction resistance of an anchor rod is increased, the anti-pulling bearing capacity of an anti-floating anchor rod is greatly increased, and meanwhile, the expansion head at the upper part of the anchor hole is provided with a reinforcement cage, so that a small anti-floating pile is combined with the anti-floating anchor rod, and the anti-floating anchor rod can be used forThe anti-floating anchor rod arrangement density can be reduced, meanwhile, the anchor rod body is made of steel strands, the construction cost is reduced, the construction process is simple, the construction efficiency is extremely high, the expanded section of the steel strands is wrapped by PE grease pipes and is not bonded with grouting bodies, the grouting bodies are separated by using annular steel plates as pressure-bearing steel plates, the grouting bodies of the lower anchoring section provide anchoring force in a tensile mode, the grouting bodies of the upper free section provide anchoring force in a compression mode, the two grouting bodies are overlapped, the extremely large ultimate anti-pulling bearing capacity is provided, more tension cracks can be effectively avoided when the anti-floating anchor rod works because all grouting bodies are in a tensile state, and the anti-corrosion of the anti-floating anchor rod body is enhanced.

Drawings

FIG. 1 is a schematic view of the overall external structure provided by the present utility model;

FIG. 2 is an enlarged schematic view of the structure of portion A in FIG. 1 according to the present utility model;

fig. 3 is a schematic view of the external structure of the prestressed anchorage cable provided by the utility model.

In the figure: 1. a guide cap; 2. pre-stress anchor cables; 3. a pressure bearing plate; 4. spiral stirrups; 5. a reinforcement cage body; 6. a cushion layer; 7. a flexible waterproof layer; 8. modified asphalt waterproof ointment; 9. modified asphalt waterproof coiled material; 10. a waterproof coating; 11. expansion water stop strips; 12. a water-stopping steel plate; 13. a foundation raft; 14. a PVC pipe; 15. an anchor backing plate; 16. a limiting plate; 17. a jack; 18. a tool anchor; 19. a wire loop is arranged; 20. wire loops.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

The implementation of the present utility model will be described in detail below with reference to specific embodiments.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

Referring to fig. 1-3, a preferred embodiment of the present utility model is provided.

The tension-compression composite anti-floating anchor structure applied to the weathered granite area comprises a reinforcement cage body 5 and a spiral stirrup 4 arranged on the outer side surface of the reinforcement cage body 5, wherein the spiral stirrup 4 has integral continuous characteristics and is used for improving the bearing capacity and the anti-damage capacity of an enlarged head component at the upper part of an anchor hole, the inner wall of the reinforcement cage body 5 is provided with a prestress tension structure, and the prestress tension structure is used as a grouting frame at the outer side of the reinforcement cage body and is used for improving the protection performance;

the top surface mounting of steel reinforcement cage body 5 has waterproof construction, and waterproof construction is used for reinforcing anti-floating anchor body of rod corrosion resistance, and the internally mounted of steel reinforcement cage body 5 has anchor rope tensioning mechanism, and anchor rope tensioning mechanism is used for reinforcing the holistic ultimate anti-pulling bearing capacity of structure.

Specifically, the prestress tensioning structure comprises a prestress anchor cable 2 and a guide cap 1, the guide cap 1 is used as a conical protection device, the guide cap 1 is installed on the bottom end surface of the prestress anchor cable 2, a plurality of wire-supporting rings 19 are installed on the outer side surface of the prestress anchor cable 2 every 1.5 meters, wire-binding rings 20 are installed on the outer side surface of the prestress anchor cable 2 between the two wire-supporting rings 19, an enlarged head with a certain length and a larger diameter is formed after grouting of a reinforcement cage with a larger upper diameter, and the contact area of a grouting body and surrounding rock-soil bodies is greatly improved, so that the friction resistance of an anchor rod is increased, and the anti-floating anchor rod anti-pulling bearing capacity is greatly increased.

Further, the prestressed anchor cable 2 comprises an anchor cable free section and an anchoring section, the anchor cable free section is connected with the anchoring section, two frame wire loops 19 are respectively arranged on the outer side surfaces of the anchor cable free section and the anchoring section, the connection part of the anchor cable free section and the anchoring section is provided with a bearing plate 3, the bearing plate 3 is of an annular structure, more tensioning cracks are effectively avoided due to the fact that all grouting bodies are in a tensioned state when the anti-floating anchor rod works, groundwater permeates into the anchor rod through the cracks to cause the occurrence of the problem that the long-term corrosion resistance of the anchor rod body is poor, and the corrosion resistance of the anti-floating anchor rod body is enhanced.

Further, the waterproof structure comprises a PVC pipe 14 and a waterproof component, the PVC pipe 14 is sleeved on the top surface of the prestressed anchor cable 2, and fine stone concrete with the strength higher than that of the raft concrete grade one is adopted in the PVC pipe 14 pre-buried in the waterproof component to be doped with a waterproof agent and an expanding agent for irrigation, so that groundwater leakage is prevented.

Further, the waterproof assembly sets up on the top surface of steel reinforcement cage body 5, and the waterproof assembly includes bed course 6 and flexible waterproof layer 7, and bed course 6 sets up the outside surface at steel reinforcement cage body 5, and flexible waterproof layer 7 sets up the top surface at bed course 6, and modified asphalt waterproof oleamen 8, modified asphalt waterproofing membrane 9, waterproof coating 10, inflation sealing strip 11 and sealing steel sheet 12 have been laid in proper order from bottom to top on the top surface of flexible waterproof layer 7.

Further, the anchor cable tensioning mechanism comprises a jack 17 and a tensioning assembly, the jack 17 is arranged on the top end surface of the tensioning assembly, the tensioning assembly comprises an anchor backing plate 15 and a limiting plate 16, the anchor backing plate 15 is arranged on the top end surface of a PVC pipe 14, a foundation raft 13 is arranged on the bottom end surface of the anchor backing plate 15, the limiting plate 16 is arranged on the top end surface of the anchor backing plate 15, the jack 17 is arranged on the top end surface of the limiting plate 16, a tool anchor 18 is arranged on the top end surface of the jack 17, an expanded section steel strand is wrapped by a PE grease pipe and is not adhered to a grouting body, and an annular steel plate is used as a bearing plate 3 to separate the grouting body, so that the grouting body of the lower anchoring section provides anchoring force in a tensioned mode, and the grouting body of the upper free section provides anchoring force in a pressed mode, and the two are overlapped to provide very large limiting anti-pulling bearing capacity.

When in use, the method comprises the following steps:

(1) Leveling field

Digging to the top mark height position of the foundation pit anti-floating anchor design cushion layer 6, removing obstacles in the foundation pit and leveling the field;

(2) Mechanical adjustment

The special jumbolter is hoisted into the foundation pit by using large hoisting equipment, the installation condition of each part of the jumbolter is checked, the firm and reliable installation is ensured, the size of a drill bit is checked, and the diameter of the drill bit is ensured not to be smaller than the diameter of an anchor hole;

(3) Anchor hole positioning

According to the construction drawing, measuring the position of the released anchor hole by using a total station, marking, measuring and rechecking after the measuring point is finished, checking and accepting after rechecking, wherein the allowable deviation of the hole site is +/-50 mm;

(4) Mechanical positioning

1) Moving an anchor rod drilling machine to a construction anchor rod point, and laying a sleeper under the drilling machine, wherein a road base plate is required to be laid when necessary, so that the lower side of the drilling machine is smooth, stable and firm in laying, and high stability in the drilling process of the drilling machine is ensured;

2) Selecting drill rods according to the design depth of the anchor rod, sequentially sequencing and numbering the drill rods, and marking the end position of the anchor hole reaming and the end position of the last section of drill rod by using a marker pen according to the design depth requirement;

3) Adjusting the position of the drill bit to be aligned with the point position of the measuring and placing, adjusting the verticality of the drill rod, and drilling after rechecking is qualified, wherein the allowable deviation is preferably less than 1%;

(5) Hole forming acceptance inspection

1) Selecting a proper drill bit according to the design diameter of the anchor hole to perform pipe following drilling, and connecting a drill rod with the next number after the drilling length of a section of drill rod is finished during drilling until the drilling is completed to the design depth;

2) After drilling and footage to the calibrated scale, measuring and checking the hole depth, and after confirming that no error exists, extracting the sleeve and the drill rod section by section;

3) Changing a reaming bit to ream, and connecting a drill rod with the next number after finishing the length feeding of a section of drill rod during reaming until the depth is reamed to the designed depth; when drilling, a mud circulation guard wall is adopted, mud is circulated repeatedly, residues are continuously removed from the mud flowing out of the orifice, and the proportion of the mud is increased when meeting the sand layer section so as to prevent the hole from collapsing;

4) After reaming to the calibrated scale, measuring and checking the hole depth, and pulling out the drill rod section by section after confirming no error;

(6) Hole cleaning

Repeatedly using high-quality slurry to perform gas lift reverse circulation hole cleaning, removing residues such as drilling slag in the hole, measuring the thickness of sediment at the bottom of the hole, and performing the next procedure after acceptance inspection.

(7) Manufacturing and installing of reinforcement cage body 5

1) Manufacturing the reinforcement cage body 5 according to design requirements in a reinforcement factory, carefully checking reinforcement raw materials before manufacturing, ensuring the reinforcement raw materials to be flat and removing greasy dirt and rust on the surface of the reinforcement raw materials, wherein no obvious scratch is formed on the surface after the straightening, and welding test is required before welding the reinforcement raw materials, and welding can be performed after the reinforcement raw materials are qualified;

2) The reinforcement cage bodies are connected by welding, the welding length is 10d, the joint positions of the stressed reinforcements with the same section arranged in the same member are staggered, and the joint percentage of the same section is not more than 50%;

3) After the framework is completed, the reinforcement cage body 5 is moved to a cage rolling machine for spiral stirrup 4 construction, a spot welding mode is adopted to weld the bearing plate 3 and the bottom end of the reinforcement cage body 5, and a cushion block is arranged on the outer side of the reinforcement cage body according to the standard requirement, so that the whole welding of the reinforcement cage body 5 is completed;

4) Hoisting the reinforcement cage body 5 immediately after hole cleaning is completed, hoisting the reinforcement cage body 5 by using a crane, hoisting the reinforcement cage body 5 at the hole opening, and suspending the reinforcement cage body 5 at the hole opening by using a penetrating bar in time after hoisting is completed;

(8) Secondary hole cleaning

Cleaning holes again after hoisting of the reinforcement cage body 5 is completed, so that no sediment is left in anchor holes;

(9) Production and installation of prestressed anchor cable 2

1) Manufacturing a pre-stressed anchor cable 2 on a bench of a steel bar factory, carefully checking steel strands before assembly, and removing the steel strands with rust and tooth marks;

2) The outer side of the prestressed anchor cable 2 is sequentially provided with a guide cap 1, a wire-setting ring 19 and a wire-binding ring 20, wherein the wire-setting ring 19 is arranged every 1.5m along the axis direction of the rod body, and the protective layer of the rod body is not smaller than 20mm;

3) The bottom end of the prestressed anchor cable 2 is provided with a guide cap 1, so that the misplaced end part is conveniently protected from being damaged, and the wall of the hole can be prevented from being damaged when the prestressed anchor cable 2 is inserted;

4) A PE grease light pipe is sleeved on the outer side of the free section of the anchor cable and is firmly tied, so that the free section of the anchor cable is separated from the slurry;

5) Arranging a ring-shaped steel plate as a supporting body at the junction of the anchor rope free section and the anchor section, namely at the anchor hole reaming position, and separating grouting bodies at the upper part and the lower part of the anchor hole;

6) The primary grouting pipe and the secondary grouting pipe are bound with the rod body, are arranged along the whole length of the rod body, the secondary grouting Guan Zakong interval is 500mm, and the pipe end and the grouting hole are glued and sealed;

7) The prestressed anchor cable 2 is installed in the center of the hole immediately after the hole cleaning of the anchor hole is completed, and the prestressed anchor cable 2 cannot be pressed into the hole by using external force when being installed so as to avoid twisting and damaging the prestressed anchor cable 2;

(10) Grouting

1) Before grouting, the cement paste with specific proportion is prepared by on-site stirring of P.O.42.5R commodity cement, the cement paste is firstly measured for water-cement ratio parameters after stirring, and the cement paste is permitted to be used after rechecking is qualified;

2) The primary grouting is carried out after the anchor rod is installed, the cement paste cement ratio is 0.40-0.55, the grouting is carried out at normal pressure, and the primary grouting is stopped when the grout overflows from the orifice;

3) The cement paste water-cement ratio of the secondary grouting is 0.65-0.85, the grouting pressure is 2.0-2.5 MPa, the grouting is carried out after 4-8 hours of primary grouting, the pressure is stabilized for 5 minutes when the grouting pressure reaches more than 1.5MPa, and measures are taken to avoid influencing the grouting quality when precipitation measures are taken;

4) Timely supplementing slurry when the slurry surface of the orifice subsides;

5) After grouting, in order to prevent the underground water from leaking along the grouting pipe, the grouting pipe needs to be sheared off in time;

6) After grouting, the exposed steel strand at the anchor head part is sleeved by the PVC pipe 14 in time, so that the injury of surrounding workers is prevented, and meanwhile, the steel strand is prevented from being adhered and cannot be stretched when the cushion layer 6 and the waterproof layer are manufactured;

(11) Production of cushion layer 6 and waterproof assembly

1) Digging to the bottom elevation of the designed cushion layer 6 after grouting is completed, and manufacturing the cushion layer 6;

2) After the cushion layer 6 is manufactured, a waterproof component is paved, wherein the waterproof component comprises a flexible waterproof layer 7, a modified asphalt waterproof ointment 8, a modified asphalt waterproof coiled material 9, a waterproof coating 10, an expansion water stop strip 11 and a water stop steel plate 12 from bottom to top;

(12) Raft board manufacture

Manufacturing a basic raft 13 on the waterproof assembly according to design requirements;

(13) Curing

Carrying out natural maintenance after the construction of the prestressed anchor cable 2 is completed;

(14) Tensioning and locking of anchor cable

1) After the prestress anti-floating anchor rod anchoring body is maintained for 28 days and the strength of the raft concrete of the underground structure reaches 90% of the design strength, the stretching and locking prestress anchor cable 2 can be stretched;

2) Before the tensioning equipment is installed, calibrating pressure data of the jack 17 and the oil pump, and checking whether the tensioning equipment operates normally or not;

3) Before tensioning, stripping off PVC (polyvinyl chloride) pipes 14 of steel strands outside the raft, wiping off butter on the steel comparison wires with cotton yarns, and penetrating the steel comparison wires into an anchor backing plate 15, a limiting plate 16, a jack 17 and a tool anchor 18 in sequence;

4) Before tensioning, the tensioning base below the anchor backing plate 15 needs to be ensured to be straight, the anchor device is ensured to be vertical to the steel stranded wire, and the jack 17 is consistent with the axial direction of the anchor rod and cannot be twisted to bend the anchor head;

5) Pre-tensioning is carried out before tensioning, the tension is 0.1-0.2 NtNt which is the designed shaft tension, so that the unbonded steel stranded wires are ensured to be in close contact with a tensioning clamp and an anchoring body, and then grading tensioning is carried out according to the standard requirement;

(15) Sealing anchor

1) Sealing the anchor after the anchor rod is accepted, cutting the exposed redundant steel stranded wires by using a grinder, and sealing the anchor head by using concrete with the same label as the raft;

2) The PVC pipe 14 pre-buried in the waterproof component is irrigated by adopting fine stone concrete with the strength higher than that of the raft concrete grade one, and the waterproof agent and the expanding agent are doped in the fine stone concrete to prevent the leakage of underground water.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (6)

1. Be applied to compound anti-floating anchor structure of pulling and pressing in weathering granite area, including the steel reinforcement cage body and install the spiral stirrup at steel reinforcement cage body outside surface, the spiral stirrup possesses whole continuous characteristic for improve the bearing capacity and the anti-damage ability of anchor eye upper portion enlarged footing component, its characterized in that: the inner wall of the reinforcement cage body is provided with a prestress tensioning structure, and the prestress tensioning structure is used as a grouting frame at the outer side of the reinforcement cage body and improves the protection performance;

the top surface of the reinforcement cage body is provided with a waterproof structure which is used for enhancing the corrosion resistance of the anti-floating anchor rod body, the interior of the reinforcement cage body is provided with an anchor cable tensioning mechanism which is used for enhancing the ultimate anti-pulling bearing capacity of the whole structure;

the prestress tensioning structure comprises prestress anchor cables and guide caps, wherein the guide caps are arranged on the surfaces of the bottom ends of the prestress anchor cables, two wire-setting rings are arranged on the outer side surfaces of the prestress anchor cables, and wire binding rings are arranged on the outer side surfaces of the prestress anchor cables between the two wire-setting rings.

2. The tension-compression composite anti-floating anchoring structure applied to weathered granite areas as set forth in claim 1, wherein: the prestressed anchor cable comprises an anchor cable free section and an anchoring section, wherein the anchor cable free section is connected with the anchoring section, a bearing plate is arranged at the joint of the anchor cable free section and the anchoring section, and the bearing plate is of an annular structure.

3. The tension-compression composite anti-floating anchoring structure applied to weathered granite areas as set forth in claim 1, wherein: the waterproof structure comprises a PVC pipe and a waterproof component, wherein the PVC pipe is sleeved on the top surface of the prestressed anchor cable, and the waterproof component is arranged on the top surface of the reinforcement cage body.

4. The tension-compression composite anti-floating anchoring structure applied to weathered granite areas according to claim 3, wherein: the waterproof assembly comprises a cushion layer and a flexible waterproof layer, wherein the cushion layer is arranged on the outer side surface of the reinforcement cage body, the flexible waterproof layer is arranged on the top end surface of the cushion layer, and modified asphalt waterproof ointment, modified asphalt waterproof coiled materials, waterproof coating, expansion water stop strips and water stop steel plates are sequentially paved on the top end surface of the flexible waterproof layer from bottom to top.

5. The tension-compression composite anti-floating anchoring structure applied to weathered granite areas as set forth in claim 1, wherein: the anchor cable tensioning mechanism comprises a jack and a tensioning assembly, wherein the tensioning assembly is arranged on the top surface of the PVC pipe, and the jack is arranged on the top surface of the tensioning assembly.

6. The tension-compression composite anti-floating anchoring structure applied to weathered granite areas according to claim 5, wherein: the tensioning assembly comprises an anchor backing plate and a limiting plate, wherein a foundation raft is arranged on the bottom end surface of the anchor backing plate, the limiting plate is arranged on the top end surface of the anchor backing plate, the jack is arranged on the top end surface of the limiting plate, and a tool anchor is arranged on the top end surface of the jack.

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