Anti-floating anchor rod structure for residence along river area and using method of anti-floating anchor rod structure

Abstract

The invention relates to the related technical field of constructional engineering, in particular to an anti-floating anchor rod structure for residences along a river and a using method thereof, the anti-floating anchor rod structure comprises an anchor rod body, and a foundation raft is fixedly connected to the upper surface of the anchor rod body. According to the anti-floating anchor rod structure for the residence along the river area and the using method thereof, the assembling method is simple, the anti-floating anchor rod structure formed after construction is high in strength, the reinforcement cage assembly on the outer side of the anchor rod body is formed by welding the reinforcement cage body and the U-shaped supporting frame, the compressive strength of the anchor rod can be improved, deformation is prevented, and the service life of the anchor rod is prolonged. The prestressed cylinders welded to the upper end and the lower end of the anchor rod can improve the bearing performance of a grouting body and enlarge the prestress application range, the supporting mechanism enhances the connection firmness of the anchor rod and a foundation raft and improves the anti-floating performance, in addition, secondary grouting and impervious concrete pouring are conducted, the anchor rod is effectively prevented from being corroded by underground water, the performance of the anchor rod is guaranteed, and the service life of the anchor rod is prolonged. And a reliable anti-floating guarantee is provided for residences in areas along the river.

Description

Technical Field

[0001] The present invention relates to the technical field related to construction engineering, and particularly relates to an anti-floating anchor structure for a residential building in a riverfront area and a using method thereof. Background Art

[0002] An anti-floating anchor is a kind of anti-floating measure for the underground structure of a construction project. Different from ordinary foundation piles, it has its own unique properties. The biggest difference from ordinary foundation piles is that: foundation piles are usually compressive piles, and the pile body bears the pressure of the building load, and the force is transmitted from the pile top to the pile bottom, and the magnitude of the force on the pile body changes with the change of the building load; while the anti-floating pile is a tension-bearing pile body, and the force of an ordinary anti-floating pile is also transmitted from the pile top to the pile bottom, and the magnitude of the force on the pile body changes with the change of the groundwater level, but the force mechanisms of the two are exactly opposite.

[0003] In recent years, due to the severe and changeable weather conditions, short-term excessive precipitation is likely to occur, and water accumulation is likely to occur in areas with high groundwater levels or low terrain. To avoid damage to the building structure caused by the upward floating of the building structure due to the action of groundwater buoyancy, anti-floating anchors are usually anchored and connected with raft steel bars, and the frictional force between the anchor body steel bars of the anti-floating anchor and the surrounding soil layer of the grouting body is used to resist the upward buoyancy. Therefore, there is a particular need for an anti-floating anchor structure for a residential building in a riverfront area and a using method thereof.

[0004] However, the existing anti-floating anchors can effectively balance the upward buoyancy of groundwater and ensure the force balance of the building floor slab. However, the overall compressive strength of the existing anti-floating anchors is low, and deformation is likely to occur after long-term stress, affecting the anti-floating performance. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti-floating anchor structure for a residential building in a riverfront area and a using method thereof, so as to solve the problem that the existing anti-floating anchors can effectively balance the upward buoyancy of groundwater and ensure the force balance of the building floor slab, but the overall compressive strength of the existing anti-floating anchors is low, and deformation is likely to occur after long-term stress, affecting the anti-floating performance as mentioned in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: An anti-floating anchor rod structure for a residential building in a river area, including an anchor rod body, a foundation raft plate is fixedly connected to the upper surface of the anchor rod body, a lower prestressed cylinder is welded to the bottom surface of the anchor rod body, an upper prestressed cylinder is welded to the top surface of the anchor rod body, anchor head steel bars are welded to the outer surface of the upper prestressed cylinder, a steel reinforcement cage body is welded to the outer surface of the anchor rod body, a U-shaped support frame is welded to the outer surface of the anchor rod body, a cylinder body is fixedly connected to the lower surface of the anchor rod body, prestressed stirrups are fixedly connected to the outer surface of the cylinder body, a primary grouting pipe is arranged on the inner surface of the steel reinforcement cage body, a secondary high-pressure grouting pipe is arranged on the inner surface of the steel reinforcement cage body, a first support assembly is fixedly connected to the outer surface of the upper prestressed cylinder, a second support assembly is fixedly connected to the outer surface of the upper prestressed cylinder, a first support column is fixedly connected to the outer surface of the upper prestressed cylinder, a first support plate is bolted to the lower surface of the foundation raft plate, a first locking bolt is bolted to the inner surface of the first support plate, a second support column is fixedly connected to the outer surface of the upper prestressed cylinder, a second support plate is bolted to the lower surface of the foundation raft plate, and a second locking bolt is bolted to the inner surface of the second support plate.

[0007] Preferably, the anchor rod body is made of large-diameter precision rolled ribbed steel, the foundation raft plate is arranged on the ground surface layer, and a through hole for penetrating the anchor rod body is opened at the center of the foundation raft plate.

[0008] Preferably, the foundation raft plate and the anchor rod body form an anti-floating anchor rod, and three anchor head steel bars are circumferentially welded to the outer surface of the upper prestressed cylinder.

[0009] Preferably, the U-shaped support frame and the steel reinforcement cage body form a steel reinforcement cage assembly, and the outer end of the U-shaped support frame is welded to the inner surface of the steel reinforcement cage body.

[0010] Preferably, the structures of the upper prestressed cylinder and the lower prestressed cylinder are exactly the same, and the cylinder body and the prestressed stirrups cooperate with each other to form the upper prestressed cylinder and the lower prestressed cylinder.

[0011] Preferably, the cylinder body is formed by winding steel plates, and the secondary high-pressure grouting pipe and the primary grouting pipe respectively extend from the through hole at the center of the foundation raft plate and are located inside the steel reinforcement cage body.

[0012] Preferably, the bottom ends of the primary grouting pipe and the secondary high-pressure grouting pipe are both at the bottom end face of the lower prestressed cylinder, and a number of high-pressure slurry outlet holes are opened on the outer surface of the secondary high-pressure grouting pipe.

[0013] Preferably, the first support assembly and the second support assembly are symmetrically distributed on the outer surface of the upper prestressed cylinder. The structures of the first support assembly and the second support assembly are exactly the same. The first support assembly includes a first support column, a first support plate and a first locking bolt.

[0014] Preferably, the second support plate is bolted to the foundation raft through a plurality of groups of second locking bolts. Both ends of the second support plate are welded to the outer side of the second support plate and the outer side of the upper prestressed cylinder respectively.

[0015] A method for using an anti-floating anchor rod structure for a residential building in a riverine area further includes the following steps: Step 1: First, perform hole positioning in the construction area; Step 2: Then, use a drilling machine to drill a hole at the positioning hole until the designed depth; Step 3: Then, clean the hole to remove excess impurities in the hole; Step 4: Use a crane to hoist the assembled anchor rod body into the hole; Step 5: First, inject cement mortar through the primary grouting pipe until the cement mortar overflows from the hole; Step 6: Prepare anti-seepage concrete. The components of the anti-seepage concrete include 100 - 200 parts by weight of portland cement, 10 - 20 parts of mineral powder, 4 - 16 parts of bauxite slag, 5 - 15 parts of iron ore slag, 5 - 10 parts of silica fume, 6 - 15 parts of calcined kaolin, 8 - 20 parts of activated montmorillonite, 3 - 12 parts of bisphenol A epoxy resin, 2 - 8 parts of ferrous sulfate, 2 - 6 parts of carboxymethyl cellulose, and 1 - 3 parts of PP fiber; Step 7: Before the initial setting of the cement mortar, pour the anti-seepage concrete through the secondary high-pressure grouting pipe; Step 8: Finally, pour cement slurry above the foundation soil layer to form a foundation raft, and fixedly connect the foundation raft to the first support plate and the second support plate through the first locking bolt and the second locking bolt.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The assembly method of the present invention is simple. The anti-floating anchor rod structure formed after construction has high overall strength, and has the function of enhancing the integrity and structure of the anti-floating anchor rod to reduce the prestress loss, and is suitable for application in residential buildings in riverine areas.

[0017] 2. In the present invention, the steel cage assembly on the outer side of the anchor rod body includes a steel cage body and a U-shaped support frame. The U-shaped support frame is welded to the outer wall of the anchor rod body. The steel cage body is located outside the anchor rod body, and the outer end of the U-shaped support frame is welded to the inner side of the steel cage body. With this structure, the overall compressive strength of the anchor rod can be improved, and the deformation of the anchor rod can be effectively prevented.

[0018] 3. In the present invention, a lower prestressing cylinder is welded to the bottom end of the anchor rod body, and an upper prestressing cylinder is welded to the upper end, which can effectively improve the bearing performance of the grouting body and increase the prestress application range of the anti-floating anchor rod.

[0019] 4. The support mechanism provided in the present invention can further improve the connection firmness between the anchor rod body and the foundation raft, and further improve the anti-floating performance.

[0020] 5. In the present invention, secondary grouting is adopted and impervious concrete is poured, which can effectively prevent groundwater from penetrating into the hole and corroding the anchor rod, affecting the performance of the anchor rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the support mechanism of the present invention; Figure 3 is a schematic installation diagram of the grouting pipe of the present invention; Figure 4 is a flow chart of the assembly method of the present invention.

[0022] In the figure: 1. Anchor rod body; 2. Foundation raft; 3. Lower prestressing cylinder; 4. Upper prestressing cylinder; 5. Anchor head steel bar; 6. Reinforcement cage body; 7. U-shaped support frame; 8. Cylinder; 9. Prestressed stirrup; 10. Primary grouting pipe; 11. Secondary high-pressure grouting pipe; 12. First support assembly; 13. Second support assembly; 14. First support column; 15. First support plate; 16. First locking bolt; 17. Second support column; 18. Second support plate; 19. Second locking bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-4, the present invention provides a technical solution: an anti-floating anchor rod structure for a residential building in a riverfront area, including an anchor rod body 1, a foundation raft 2 is fixedly connected to the upper surface of the anchor rod body 1, a lower prestressing cylinder 3 is welded to the bottom surface of the anchor rod body 1, an upper prestressing cylinder 4 is welded to the top surface of the anchor rod body 1, anchor head steel bars 5 are welded to the outer surface of the upper prestressing cylinder 4, a steel cage body 6 is welded to the outer surface of the anchor rod body 1, a U-shaped support frame 7 is welded to the outer surface of the anchor rod body 1, a cylinder 8 is fixedly connected to the lower surface of the anchor rod body 1, a prestressed stirrup 9 is fixedly connected to the outer surface of the cylinder 8, a primary grouting pipe 10 is arranged on the inner surface of the steel cage body 6, a secondary high-pressure grouting pipe 11 is arranged on the inner surface of the steel cage body 6, a first support assembly 12 is fixedly connected to the outer surface of the upper prestressing cylinder 4, a second support assembly 13 is fixedly connected to the outer surface of the upper prestressing cylinder 4, a first support column 14 is fixedly connected to the outer surface of the upper prestressing cylinder 4, a first support plate 15 is bolted to the lower surface of the foundation raft 2, a first locking bolt 16 is bolted to the inner surface of the first support plate 15, a second support column 17 is fixedly connected to the outer surface of the upper prestressing cylinder 4, a second support plate 18 is bolted to the lower surface of the foundation raft 2, and a second locking bolt 19 is bolted to the inner surface of the second support plate 18.

[0025] Furthermore, the anchor rod body 1 is made of large-diameter precision rolled ribbed steel. The foundation raft 2 is arranged on the ground surface layer, and a through hole for passing through the anchor rod body 1 is opened at the center of the foundation raft 2. By setting the anchor rod body 1, during use, the large-diameter precision rolled ribbed steel has high strength and good ductility, can withstand large tensile and compressive forces. The use of large-diameter precision rolled ribbed steel greatly improves the bearing capacity of the anchor rod body 1, enables the anchor rod body 1 to better cope with the buoyancy of groundwater, and reduces the risk of the anchor rod being damaged due to insufficient force.

[0026] Furthermore, the foundation raft 2 and the anchor rod body 1 form an anti-floating anchor rod. Three anchor head steel bars 5 are circumferentially welded to the outer surface of the upper prestressing cylinder 4. By setting the foundation raft 2, the anchor rod body 1 and the anchor head steel bars 5, during use, the anti-floating anchor rod system formed by the foundation raft 2 and the anchor rod body 1 improves the overall anti-floating ability, effectively guarantees the stability of the building. The setting of the three anchor head steel bars 5 significantly enhances the anchoring effect of the anchor rod body 1, increases the connection strength between the anchor rod body 1 and the surrounding soil or structure, reduces the risk of the anchor rod body 1 being pulled out, further improves the reliability and safety of the anti-floating anchor rod, and ensures that the building will not float due to the failure of the anchor rod anchoring during long-term use.

[0027] Furthermore, the U-shaped support frame 7 and the reinforcement cage body 6 form a reinforcement cage assembly. The outer end of the U-shaped support frame 7 is welded to the inner surface of the reinforcement cage body 6. Through the arrangement of the U-shaped support frame 7 and the reinforcement cage body 6, during use, the reinforcement cage assembly formed by the U-shaped support frame 7 and the reinforcement cage body 6 greatly improves the compressive and bending resistance of the anchor rod body 1, effectively prevents local deformation or damage of the anchor rod body 1 during the stress process, enhances the structural strength of the anchor rod body 1, improves the stability and reliability of the anti-floating anchor, and extends the service life of the anti-floating anchor.

[0028] Furthermore, the structures of the upper prestressed cylinder 4 and the lower prestressed cylinder 3 are exactly the same. The cylinder body 8 and the mutually cooperating prestressed stirrups 9 form the upper prestressed cylinder 4 and the lower prestressed cylinder 3. Through the arrangement of the upper prestressed cylinder 4 and the lower prestressed cylinder 3, during use, the upper prestressed cylinder 4 and the lower prestressed cylinder 3 improve the bearing capacity and anti-deformation ability of the anti-floating anchor, reduce the deformation amount of the anchor rod during long-term use, improve the durability of the anti-floating anchor, increase the range of prestress application, enable the anti-floating anchor to play a more effective role under different geological conditions and stress conditions, enhance the adaptability of the anti-floating anchor, and improve the stability and safety of the building structure.

[0029] Furthermore, the cylinder body 8 is formed by winding steel plates. The secondary high-pressure grouting pipe 11 and the primary grouting pipe 10 respectively extend from the central through-hole of the foundation raft 2 and are located inside the reinforcement cage body 6. Through the arrangement of the secondary high-pressure grouting pipe 11 and the primary grouting pipe 10, during use, the combination of the secondary high-pressure grouting pipe 11 and the primary grouting pipe 10 enhances the bonding effect between the anchor rod and the soil body, improves the pulling resistance of the anti-floating anchor, effectively prevents the leakage of groundwater by filling pores and increasing the bonding strength, protects the anchor rod body 1, extends the service life of the anti-floating anchor, and improves the anti-floating stability of the building.

[0030] Furthermore, the bottoms of both the primary grouting pipe 10 and the secondary high-pressure grouting pipe 11 are located at the bottom end face of the lower prestressed cylinder 3. A number of high-pressure slurry outlet holes are provided on the outer surface of the secondary high-pressure grouting pipe 11. Through the arrangement of the primary grouting pipe 10 and the secondary high-pressure grouting pipe 11, during use, the bottoms of the primary grouting pipe 10 and the secondary high-pressure grouting pipe 11 are located at the bottom end face of the lower prestressed cylinder 3, ensuring that the slurry can be filled from the bottom, making the grouting more uniform.

[0031] Furthermore, the first support assembly 12 and the second support assembly 13 are symmetrically distributed on the outer surface of the upper prestressed cylinder 4. The structures of the first support assembly 12 and the second support assembly 13 are exactly the same. The first support assembly 12 includes a first support column 14, a first support plate 15 and a first locking bolt 16. By providing the first support assembly 12 and the second support assembly 13, during use, the symmetrically distributed first support assembly 12 and second support assembly 13 enhance the connection strength between the anchor rod body 1 and the foundation raft 2, improve the overall stability of the anti-floating anchor rod, effectively reduce the stress concentration on the anchor rod body 1 and the foundation raft 2, and reduce the risk of structural damage. The provision of the first support assembly 12 and the second support assembly 13 further improves the anti-floating performance of the anti-floating anchor rod, enabling the building to remain stable under complex stress conditions and improving the safety and reliability of the building.

[0032] Furthermore, the second support plate 18 is bolted to the foundation raft 2 through multiple groups of second locking bolts 19. Both ends of the second support plate 18 are welded to the outer side of the second support plate 18 and the outer side of the upper prestressed cylinder 4 respectively. By providing the second locking bolts 19, during use, the multiple groups of second locking bolts 19 enhance the connection firmness between the second support assembly 13 and the foundation raft 2 and the upper prestressed cylinder 4, and improve the cooperative working ability of the entire anti-floating system.

[0033] Working principle: When the anti-floating anchor rod works, the anchor rod body 1 penetrates deep into the ground, with one end connected to the foundation raft 2 and the other end anchored in the stable soil layer. When the building is subjected to the buoyancy force of groundwater, the buoyancy is transmitted to the anchor rod body 1 through the foundation raft 2. The large-diameter precision rolled thread steel, relying on its own high-strength performance, transmits the tensile force to the deep soil layer to resist the buoyancy. The foundation raft 2 is set on the ground surface, directly bearing the vertical load of the building and evenly distributing it to the foundation soil. At the same time, the through hole in the center of the foundation raft 2 closely cooperates with the anchor rod body 1 to ensure the effective transmission of force. The anchor head steel bar 5 is welded to the outside of the upper prestressed cylinder 4. When the anchor rod body 1 is connected to the surrounding soil or other structures, the anchor head steel bar 5 is in close contact with the surrounding medium, increasing the anchoring points and friction force. When the anchor rod body 1 is subjected to an upward tensile force, the anchor head steel bar 5, relying on the friction force and biting force with the surrounding medium, prevents the anchor rod body 1 from being pulled out upward, playing a role in strengthening the anchorage. The steel cage assembly surrounds the outside of the anchor rod body 1. When the anchor rod is subjected to an external force, the U-shaped support frame 7 and the steel cage body 6 jointly bear the load. The U-shaped support frame 7 provides support for the steel cage body 6, enabling the steel cage body 6 to better play its role. During the force-bearing process, the steel cage body 6, through its close connection with the anchor rod body 1, disperses the external force to the entire assembly. The special shape and welded connection method of the U-shaped support frame 7 enhance the overall rigidity of the steel cage assembly, enabling the steel cage assembly to better resist deformation. When the anchor rod is subjected to pressure, the steel cage assembly can restrain the lateral deformation of the anchor rod body 1. When subjected to a tensile force, the steel cage assembly can assist the anchor rod body 1 to bear the tensile force and improve the overall bearing capacity. When the anti-floating anchor rod bears a tensile force, the tensile force is first transmitted from the anchor rod body 1 to the lower prestressed cylinder 3 and the upper prestressed cylinder 4. Due to the preloading effect of the prestressed stirrups 9, the cylinder 8 can better cooperate with the anchor rod body 1 when bearing the tensile force and disperse the tensile force over a larger area. The cylinder 8 is formed by winding steel plates, and this manufacturing method makes the cylinder 8 have high strength and tightness. The primary grouting pipe 10 and the secondary high-pressure grouting pipe 11 are used to inject slurry into the gap between the anchor rod and the borehole wall. The bottoms of the primary grouting pipe 10 and the secondary high-pressure grouting pipe 11 are located at the bottom end face of the lower prestressed cylinder 3, ensuring that the slurry can be filled from the bottom. When the building is subjected to the buoyancy force of groundwater, the first support assembly 12 and the second support assembly 13 work together. The foundation raft 2 transmits the buoyancy to the upper prestressed cylinder 4. The first support column 14 and the second support column 17 respectively support between the first support plate 15 and the second support plate 18 and the upper prestressed cylinder 4, dispersing the force received by the upper prestressed cylinder 4 to the first support plate 15 and the second support plate 18. The first support plate 15 and the second support plate 18 are connected to the foundation raft 2 through the first locking bolt 16 and the second locking bolt 19, transmitting the force to the foundation raft 2 and then to the foundation soil by the foundation raft 2. At the same time, the first support plate 15 and the second support plate 18 can also limit the displacement of the upper prestressed cylinder 4, ensuring the stability of the anchor rod body 1 when it is under force. Embodiment 2:

[0034] A method for using an anti-floating anchor structure for a residence along a river, further comprising the following steps: Step 1: First, locate the holes in the construction area; Step 2: Then use a drilling machine to drill holes at the positioning holes to the designed depth; Step 3: Then clean the hole to remove excess impurities in the hole; Step 4: Use a crane to lift the assembled anchor body 1 into the hole; Step 5: First, inject cement mortar into the cement mortar overflow hole through the primary grouting pipe 10; Step 6: prepare anti-seepage concrete. The anti-seepage concrete components include 100-200 parts by weight of silicate cement, 10-20 parts of mineral powder, 4-16 parts of aluminum slag, 5-15 parts of iron slag, 5-10 parts of silica fume, 6-15 parts of calcined kaolin, 8-20 parts of activated montmorillonite, 3-12 parts of bisphenol A epoxy resin, 2-8 parts of ferrous sulfate, 2-6 parts of carboxymethyl cellulose, and 1-3 parts of PP fiber. Step 7: Before the cement mortar begins to set, pour in the anti-seepage concrete through the secondary high-pressure grouting pipe 11; Step eight: Finally, pour cement slurry on the foundation soil layer to form a foundation raft 2, and fix the foundation raft 2 to the first support plate 15 and the second support plate 18 through the first locking bolts 16 and the second locking bolts 19.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-floating anchor rod structure for a residence in a riverfront area, comprising an anchor rod body (1), characterized in that: Above the upper surface of the anchor rod body (1), a foundation raft (2) is fixedly connected. At the bottom surface of the anchor rod body (1), a lower prestressed cylinder (3) is welded. At the top surface of the anchor rod body (1), an upper prestressed cylinder (4) is welded. At the outer surface of the upper prestressed cylinder (4), anchor head steel bars (5) are welded. At the outer surface of the anchor rod body (1), a steel reinforcement cage body (6) is welded. At the outer surface of the anchor rod body (1), a U-shaped support frame (7) is welded. Below the lower surface of the anchor rod body (1), a cylinder body (8) is fixedly connected. At the outer surface of the cylinder body (8), prestressed stirrups (9) are fixedly connected. Inside the inner surface of the steel reinforcement cage body (6), a primary grouting pipe (10) is arranged. Inside the inner surface of the steel reinforcement cage body (6), a secondary high-pressure grouting pipe (11) is arranged. At the outer surface of the upper prestressed cylinder (4), a first support assembly (12) is fixedly connected. At the outer surface of the upper prestressed cylinder (4), a second support assembly (13) is fixedly connected. At the outer surface of the upper prestressed cylinder (4), a first support column (14) is fixedly connected. Below the lower surface of the foundation raft (2), a first support plate (15) is bolted. Inside the inner surface of the first support plate (15), a first locking bolt (16) is bolted. At the outer surface of the upper prestressed cylinder (4), a second support column (17) is fixedly connected. Below the lower surface of the foundation raft (2), a second support plate (18) is bolted. Inside the inner surface of the second support plate (18), a second locking bolt (19) is bolted.

2. The anti-floating anchor rod structure for a riverside residential area according to claim 1, characterized in that: The anchor rod body (1) is made of large-diameter precision rolled threaded steel. The foundation raft (2) is arranged on the ground surface layer, and a through hole for passing through the anchor rod body (1) is opened at the center of the foundation raft (2).

3. The anti-floating anchor rod structure for a riverside residential area according to claim 1, characterized in that: The foundation raft (2) and the anchor rod body (1) form an anti-floating anchor rod. Three anchor head steel bars (5) are circumferentially welded on the outer surface of the upper prestressed cylinder (4).

4. A floating resistance anchor rod structure for a residential building in a riverfront area according to claim 1, characterized in that: The U-shaped support frame (7) and the steel reinforcement cage body (6) form a steel reinforcement cage assembly. The outer end of the U-shaped support frame (7) is welded and connected to the inner surface of the steel reinforcement cage body (6).

5. The anti-floating anchor rod structure for a residential building in a riverfront area according to claim 1, characterized in that: The structures of the upper prestressed cylinder (4) and the lower prestressed cylinder (3) are completely the same. The cylinder body (8) and the mutually cooperating prestressed stirrups (9) form the upper prestressed cylinder (4) and the lower prestressed cylinder (3).

6. A anti-floating anchor rod structure for a riverside residential area according to claim 1, characterized in that: The cylinder body (8) is formed by winding steel plates. The secondary high-pressure grouting pipe (11) and the primary grouting pipe (10) respectively extend into the center through hole of the foundation raft (2) and are located inside the steel reinforcement cage body (6).

7. A anti-floating anchor rod structure for a residential building in a riverfront area according to claim 1, characterized in that: The bottom ends of the primary grouting pipe (10) and the secondary high-pressure grouting pipe (11) are both at the bottom end face of the lower prestressed cylinder (3). A number of high-pressure grouting holes are opened on the outer surface of the secondary high-pressure grouting pipe (11).

8. A floating resistance anchor rod structure for a riverside residential area according to claim 1, characterized in that: The first support assembly (12) and the second support assembly (13) are symmetrically distributed on the outer surface of the upper prestressed cylinder (4). The structures of the first support assembly (12) and the second support assembly (13) are exactly the same. The first support assembly (12) includes a first support column (14), a first support plate (15), and a first locking bolt (16).

9. A anti - floating anchor rod structure for a riverside residential area according to claim 1, characterized in that: The second support plate (18) is bolted to the foundation raft (2) through multiple groups of second locking bolts (19). Both ends of the second support plate (18) are welded to the outer side of the second support plate (18) and the outer side of the upper prestressed cylinder (4).

10. A method for using an anti-floating anchor rod structure for a residence in a riverfront area, characterized in that: Adopting an anti-floating anchor structure for a residential building in a riverfront area according to any one of claims 1-8, further comprising the following steps Step 1: First, perform hole positioning in the construction area; Step 2: Then, use a drilling machine to drill at the positioning hole until the design depth is reached; Step 3: Then, perform hole cleaning to remove excess impurities in the hole; Step 4: Use a crane to hoist the assembled anchor body (1) into the hole; Step 5: First, inject cement mortar through the primary grouting pipe (10) until the cement mortar overflows from the hole; Step 6: Prepare impermeable concrete. The components of the impermeable concrete include 100-200 parts of portland cement, 10-20 parts of mineral powder, 4-16 parts of bauxite slag, 5-15 parts of iron ore slag, 5-10 parts of silica fume, 6-15 parts of calcined kaolin, 8-20 parts of activated montmorillonite, 3-12 parts of bisphenol A epoxy resin, 2-8 parts of ferrous sulfate, 2-6 parts of carboxymethyl cellulose, and 1-3 parts of PP fiber by weight; Step 7: Before the cement mortar starts to set, pour the impermeable concrete through the secondary high-pressure grouting pipe (11); Step 8: Finally, pour cement slurry above the foundation soil layer to form the foundation raft (2), and fixedly connect the foundation raft (2) to the first support plate (15) and the second support plate (18) through the first locking bolt (16) and the second locking bolt (19).

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