Prestress anti-floating anchor rod anchoring structure and construction method thereof

Abstract

The invention discloses a pre-stress anti-floating anchor rod anchoring structure, a pre-stress transmission device and a pre-stress transmission cylinder are arranged above an anchor rod body, and the pre-stress transmission device is located above the pre-stress transmission cylinder; the prestress transmission device comprises a first plate component, a second plate component and a connecting piece for connecting the first plate component and the second plate component; an anchorage device is arranged above the second plate component, an anchor rod rib body penetrates through the prestress transmission cylinder, the first plate component and the second plate component, and the top end of the anchor rod rib body is fixedly connected with the anchorage device; the top ends of the prestress transmission device, the prestress transmission cylinder, the anchorage device and the anchor rod rib body are all contained in the bottom plate. The anchoring height can be adjusted by adjusting the prestress transmission cylinder according to the requirement for the anchoring connection bearing capacity, the adaptive capacity of an anchoring system is greatly improved, and the anchoring system is very convenient and efficient; the prestress transmission cylinder is made of concrete, the cost is low, the production efficiency is very high, and compared with the prior art, the anti-corrosion performance can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to a prestressed anti - floating anchor rod anchoring structure and a construction method thereof, belonging to the technical field of anti - floating structures. Background Art

[0002] The construction of most basements takes into account and solves the anti - floating problem of groundwater. Prior art 1 (publication number CN214993801U) discloses a prestressed anchor rod anti - floating structure, which involves a prestressed anti - floating anchor rod that completes prestress tensioning and locking before the basement floor is poured. It realizes the connection and anchoring of the anchor rod and the floor by setting a prestress transfer device at the top of the anchor rod; Prior art 2 (publication number CN217231965U) discloses a cast prestress transfer device for anti - floating anchor rods, which further optimizes the prestress transfer device in prior art 1; Prior art 3 (publication number CN217896482U) discloses a concrete precast member for prestressed anti - floating anchor rods, which involves a prestress transfer device for a concrete precast structure.

[0003] Currently, in the patent solution of prior art 1, mainly the prestress transfer device in prior art 2 is adopted. This prestress transfer device is made of metal, and the following problems mainly exist in the actual use process.

[0004] 1. As shown in Figure 1 , the bottom of the prestress transfer device abuts against the top surface of the anchor rod body, and the bottom of the prestress transfer device is roughly flush with the lower surface of the basement floor. This causes the prestress transfer device to be easily immersed and corroded by groundwater. Once the prestress transfer device is severely corroded, the prestress in the anchor rod body will fail; If the prestress transfer device of the concrete structure in prior art 3 is adopted, although the anti - corrosion problem can be solved, during the implementation process, the prestress transfer device has to bear a large pressure. Due to the existence of holes on the side of the prestress transfer device, this pressure is converted into a bending moment on the upper plate of the prestress transfer device to generate tensile force. The tensile capacity of concrete - like materials is very weak and it is very easy to crack, resulting in the bearing capacity of the entire prestress transfer device being difficult to meet the actual needs.

[0005] 2. The anchoring bearing capacity (also known as anchoring strength) of the prestress transfer device and the floor slab must meet the design requirements. Sufficient anchoring bearing capacity can ensure that when the basement floor slab is subjected to the upward buoyancy force of groundwater, the basement floor slab transfers all the buoyancy force to the anchor rod body through the prestress transfer device. The prestress transfer device is a single component. In actual projects, the requirements for anchoring bearing capacity vary greatly in different construction projects. It is difficult for a single component to be universal. Considering the maximum bearing capacity, it is a waste for projects with relatively small anchoring bearing capacity requirements, and additional hanger bars need to be added to strengthen the connection and anchoring between the prestress transfer device (or anchor bars) and the floor slab when the anchoring bearing capacity is insufficient, which increases the construction process and is not conducive to improving construction efficiency.

[0006] 3. According to the design scheme of the prior art 1, the elevation of the top of the anchor rod body must be accurately controlled to ensure that after the prestress transfer device and the anchor are installed on the top of the anchor rod body, the entire prestress transfer device, the anchor and the tendon body must be at the internal set elevation of the basement floor slab to prevent the anchor and the tendon body from being exposed on the upper surface of the basement floor slab; at the same time, if the elevation of the prestress transfer device is lower than the set elevation, it will also affect the anchoring connection strength between the anchor rod and the basement floor slab. Accurately controlling the elevation of the top of the anchor rod body during the construction of the anchor rod is not conducive to improving construction efficiency and increases the workload of the construction personnel. Summary of the Invention

[0007] The present invention provides a prestressed anti-floating anchor rod anchoring structure and its construction method, which are beneficial to further meeting the requirements of different anchoring bearing capacities on the basis of solving the anti-corrosion problem and controlling the elevation. The specific technical solutions are as follows.

[0008] A prestressed anti-floating anchor rod anchoring structure, which includes a floor slab, an anchor rod body and an anchor rod tendon body. The upper end of the anchor rod tendon body protrudes from the top surface of the anchor rod body. A prestress transfer device and a prestress transfer cylinder are arranged above the anchor rod body. The prestress transfer device is located above the prestress transfer cylinder. The prestress transfer device is made of metal material, and the prestress transfer cylinder is made of non-metal material; The prestress transfer device includes a first plate member, a second plate member and a connecting member connecting the first plate member and the second plate member. The second plate member is located above the first plate member; an anchor is arranged above the second plate member. The anchor rod tendon body passes through the prestress transfer cylinder, the first plate member and the second plate member, and the top end of the anchor rod tendon body is fixedly connected to the anchor; the top ends of the prestress transfer device, the prestress transfer cylinder, the anchor and the anchor rod tendon body are all accommodated inside the floor slab.

[0009] Adopting the above technical solution, the main improvement compared with the prior art lies in: a prestress transfer cylinder made of non-metallic material is added between the prestress transfer device and the anchor rod body. The advantages brought about are as follows: 1. The bottom of the prestress transfer cylinder is roughly flush with the lower surface of the bottom plate. When the non-metallic material prestress transfer cylinder comes into contact with groundwater, its corrosion resistance is much greater than that of the prestress transfer device made of metal material. Therefore, the corrosion resistance is significantly improved compared with the prior art. At the same time, the prestress transfer device made of metal material has strong compressive and bending resistance and can withstand the prestress transferred from the anchor rod body to the prestress transfer device through the anchor. The non-metallic material prestress transfer cylinder has strong compressive capacity and can also withstand the prestress conducted from the prestress transfer device. 2. The prestress transfer cylinder can also play a role in adjusting the anchoring bearing capacity. When the shape and size of the prestress transfer device are fixed, the higher the height of the prestress transfer device in the bottom plate, the stronger the anchoring bearing capacity of the prestress transfer device and the bottom plate. Therefore, the anchoring bearing capacity can be improved by adjusting the prestress transfer cylinder with a simpler structure and lower cost, without the need to adjust the shape and size of the prestress transfer device according to the requirements of different construction projects, so as to achieve the technical effect that a single prestress transfer device can adapt to different anchoring bearing capacity requirements and improve the adaptability of the prestress anti-floating anchor rod anchoring structure. 3. The prestress transfer cylinder can also play a role in adjusting the elevation of the prestress transfer device. It only needs to adjust the elevation of the prestress transfer cylinder according to the actual height of the top surface of the anchor rod body after construction, which greatly simplifies the construction process and reduces the workload of construction personnel. It is especially suitable for the situation where the elevation of the top of the anchor rod body is lower than the cushion layer. At this time, the prestress transfer cylinder can be adjusted to ensure that the prestress transfer device has sufficient anchoring height. It should be noted that the prestress transfer cylinder made of non-metallic material means that there is no metal on the outer surface of the prestress transfer cylinder, and it may or may not contain metal inside. The number of prestress transfer cylinders can be one or more, and multiple prestress transfer cylinders are stacked in the vertical direction. The prestress transfer cylinder has a central through hole extending in the vertical direction, and the anchor rod body can pass through the central through hole.

[0010] Preferably, the prestress transfer cylinder adopts a concrete structure or a reinforced concrete structure. This type of prestress transfer cylinder can withstand a certain prestress (pressure) and has the characteristics of excellent corrosion resistance and low cost. Preferably, the prestress transfer cylinder is a cylindrical tube, a square tube, a conical tube or a polygonal tube.

[0011] Preferably, there are two or more prestress transfer cylinders, and the two or more prestress transfer cylinders are stacked in the vertical direction. By making a single prestress transfer cylinder into a standard part, the number of prestress transfer cylinders can be adjusted according to specific design requirements, so that the adjustment of elevation and anchoring bearing capacity can be achieved while keeping the prestress transfer device unchanged, without the need to customize specific prestress transfer devices for different projects (different design requirements).

[0012] Further, the prestress transfer cylinder is a tapered cylinder, and its upper end diameter is smaller than the lower end diameter. In this way, when two or more prestress transfer cylinders are stacked in the vertical direction, several steps will be formed on the outer surface of the overall prestress transfer cylinder, and the overall prestress transfer cylinder will form a biting effect with the concrete of the bottom plate, which is beneficial to increasing the anchoring strength between the prestress transfer cylinder and the bottom plate. Preferably, the central through hole of the prestress transfer cylinder is a tapered hole, and the upper end diameter of the tapered hole is larger than the lower end diameter. In this way, when two or more prestress transfer cylinders are stacked in the vertical direction, several steps will be formed on the inner surface of the overall prestress transfer cylinder. When pouring the bottom plate, the concrete of the bottom plate will fill into the central through hole of the prestress transfer cylinder through the prestress transfer device, and the overall prestress transfer cylinder will form a biting effect with the concrete of the bottom plate, which is beneficial to increasing the anchoring strength between the prestress transfer cylinder and the bottom plate. Preferably, the upper and lower adjacent prestress transfer cylinders are matched through a concave-convex structure. The prestress transfer cylinder and the prestress transfer device can also be matched through a concave-convex structure. This is beneficial to the centering and positioning between adjacent components.

[0013] Further, the connecting member is a cylindrical barrel, a tapered barrel, several steel bars or several plate members, etc. The connecting member needs to be able to withstand the corresponding prestress (pressure), and its structural form can be various.

[0014] Based on the same inventive concept, the present invention also relates to a construction method of a prestressed anti-floating anchor rod anchoring structure for constructing the above-mentioned prestressed anti-floating anchor rod anchoring structure, which mainly includes the following steps: 1). After the construction of the anchor rod body and the anchor rod reinforcement of the prestressed anti-floating anchor rod is completed, install the prestress transfer cylinder and the prestress transfer device above the anchor rod body, and the anchor rod reinforcement penetrates through the first plate member and the second plate member of the prestress transfer cylinder and the prestress transfer device; 2). Set an anchor on the second plate member, perform prestress tensioning on the anchor rod reinforcement, and lock the prestress of the anchor rod reinforcement with the anchor; 3). Construct the bottom plate, and pour the top ends of the prestress transfer cylinder, the prestress transfer device, the anchor and the anchor rod reinforcement into the interior of the bottom plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects.

[0016] After adopting this solution, according to the requirements of the anchoring connection bearing capacity, the anchoring height can be conveniently adjusted by adjusting the specification and / or quantity of the prestress transfer cylinders, greatly improving the adaptability of the anchoring system (prestress transfer device, prestress transfer cylinder, anchor, etc.), and no longer necessarily adopting auxiliary strengthening measures such as hanger bars, which is very convenient and efficient. The prestress transfer cylinder is made of concrete, with low cost and very high production efficiency, and can significantly improve the anti-corrosion performance compared with the existing technology. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the existing prestressed anti-floating anchor rod anchoring structure; Figure 2 is a schematic diagram of the prestressed anti-floating anchor rod anchoring structure of Embodiment 1 of the present invention; Figure 3 is a schematic diagram of a circular prestress transfer cylinder; Figure 4 is a schematic diagram of a square prestress transfer cylinder; Figure 5 is a schematic diagram of a polygonal prestress transfer cylinder; Figure 6 is a schematic diagram of a conical prestress transfer cylinder; Figure 7 is a schematic diagram of a prestress transfer cylinder with reinforcing bars; Figure 8 is a schematic diagram of the prestressed anti-floating anchor rod anchoring structure of Embodiment 2 of the present invention (two prestress transfer cylinders); Figure 9 is a schematic diagram of the prestressed anti-floating anchor rod anchoring structure of Embodiment 2 of the present invention (three prestress transfer cylinders); Figure 10 is a schematic diagram of the prestressed anti-floating anchor rod anchoring structure of Embodiment 3 of the present invention; Figure 11 is a schematic diagram of the cooperation of adjacent prestress transfer cylinders; Figure 12 is a schematic diagram of the cooperation of the prestress transfer cylinder and the prestress transfer device; Figure 13 is a schematic diagram of the prestressed anti-floating anchor rod anchoring structure of Embodiment 4 of the present invention.

[0018] In the figure: bottom plate 1; anchor rod body 2; anchor rod reinforcement 3; prestress transfer device 4; first plate member 401; second plate member 402; connecting member 403; prestress transfer cylinder 5; reinforcing bar 501; central through hole 502; anchor 6; cushion layer 7; foundation 8; hanger bar 9. Detailed Description of the Invention

[0019] The present invention will be further described in detail below with reference to the drawings.

[0020] Example 1 As Figures 2 - 7 shown, a prestressed anti - floating anchor rod anchoring structure includes a bottom plate 1, an anchor rod body 2 and an anchor rod reinforcement 3. The upper end of the anchor rod reinforcement 3 protrudes from the top surface of the anchor rod body 2. Above the anchor rod body 2, a prestress transfer device 4 and a prestress transfer cylinder 5 are provided. The prestress transfer device 4 is located above the prestress transfer cylinder 5. The prestress transfer device 4 is made of metal material, and the prestress transfer cylinder 5 is made of non - metal material; The prestress transfer device 4 includes a first plate member 401, a second plate member 402 and a connecting member 403 connecting the first plate member 401 and the second plate member 402. The second plate member 402 is located above the first plate member 401. Above the second plate member 402, an anchor 6 is provided. The anchor rod reinforcement 3 passes through the prestress transfer cylinder 5, the first plate member 401 and the second plate member 402, and the top end of the anchor rod reinforcement 3 is fixedly connected to the anchor 6. The top ends of the prestress transfer device 4, the prestress transfer cylinder 5, the anchor 6 and the anchor rod reinforcement 3 are all accommodated inside the bottom plate 1.

[0021] Among them, the connecting member 403 can be a cylinder, a cone, several steel bars or several plate members, etc. The connecting member 403 needs to be able to withstand the corresponding prestress (pressure), and its structural form can be various. The anchor rod reinforcement 3 can be made of steel strand (unbonded steel strand) or rolled thread steel, etc. The prestress transfer cylinder 5 and the prestress transfer device 4, on the one hand, bear the prestress generated by the anchor rod reinforcement 3, and on the other hand, the two can be well anchored together with the bottom plate 1. When the bottom plate 1 is subjected to the upward buoyancy of groundwater, the bottom plate can transfer the upward buoyancy to the anchor rod reinforcement 3 and the anchor rod body 2 through the prestress transfer cylinder 5 and the prestress transfer device 4. The entire prestressed anchor rod (including the anchor rod body 2, the anchor rod reinforcement 3, the prestress transfer device 4, the prestress transfer cylinder 5, the anchor 6) is equivalent to a "nail" of the bottom plate 1, and the prestress transfer device 4, the prestress transfer cylinder 5 and the anchor 6 together are equivalent to the nail head located inside the bottom plate 1. In this way, the bottom plate 1 can transfer the groundwater buoyancy it receives to the foundation through the "nail", so as to ensure that the bottom plate 1 is not damaged by the water buoyancy. The bottom plate 1 usually refers to the basement bottom plate, which is a reinforced concrete structure.

[0022] Among them, Figure 2 a cushion layer 7 is also shown. The cushion layer 7 is usually a plain concrete layer, and the cushion layer 7 is located above the foundation 8. During the construction of the prestressed anchor rod, first drill a hole at the foundation 8, then place the anchor rod reinforcement 3 in the hole (not shown) of the foundation 8, and then pour concrete or slurry in the hole and form the anchor rod body 2 after solidification. Then lay the cushion layer 7 on the foundation 8 (of course, the cushion layer 7 can also be laid before drilling). Figure 2The prestress transfer cylinder 5 therein directly abuts against the top surface of the anchor rod body 2. In some construction plans, the prestress transfer cylinder 5 directly abuts against the cushion layer 7 located above the top surface of the anchor rod body 2.

[0023] The prestress transfer cylinder 5 adopts a concrete structure or a reinforced concrete structure. This type of prestress transfer cylinder 5 can withstand a certain prestress (pressure), and has the characteristics of excellent corrosion resistance and low cost. Preferably, the prestress transfer cylinder 5 is a cylindrical tube ( Figure 3 ), a square tube ( Figure 4 ), a polygonal tube ( Figure 5 ), or a conical tube ( Figure 6 ).

[0024] Adopting the above technical solution, the main improvement compared with the prior art lies in: a prestress transfer cylinder 5 made of a non-metallic material is added between the prestress transfer device 4 and the anchor rod body 2. The advantages brought about are as follows: 1. The bottom of the prestress transfer cylinder 5 is roughly flush with the lower surface of the bottom plate 1. When the non-metallic material prestress transfer cylinder 5 comes into contact with groundwater, its corrosion resistance is much greater than that of the metal material prestress transfer device 4. Therefore, the corrosion resistance is significantly improved compared with the prior art. At the same time, the metal material prestress transfer device 4 has strong compressive and bending resistance and can withstand the prestress transmitted from the anchor rod tendon 3 to the prestress transfer device 4 through the anchor 6. The non-metallic material prestress transfer cylinder 5 has strong compressive capacity and can also withstand the prestress conducted from the prestress transfer device 4. 2. The prestress transfer cylinder 5 can also play a role in adjusting the anchoring bearing capacity. When the shape and size of the prestress transfer device 4 are fixed, the higher the height of the prestress transfer device 4 in the bottom plate 1, the stronger the anchoring bearing capacity of the prestress transfer device 4 and the bottom plate 1. Therefore, the anchoring bearing capacity can be improved by adjusting the prestress transfer cylinder 5 with a simpler structure and lower cost (adjusting the size, dimensions, etc. of the prestress transfer cylinder 5), rather than adjusting the shape and size of the prestress transfer device 4 according to the requirements of different construction projects, so as to achieve the technical effect that a single prestress transfer device 4 can adapt to different anchoring bearing capacity requirements and improve the adaptability of the prestress anti-floating anchor anchoring structure. 3. The prestress transfer cylinder 5 can also play a role in adjusting the elevation of the prestress transfer device 4. It only needs to adjust the elevation of the prestress transfer cylinder 5 according to the actual height of the top surface of the anchor rod body 2 after construction is completed, which greatly simplifies the construction process and reduces the workload of construction personnel; it is especially suitable for the situation where the top elevation of the anchor rod body 2 is lower than the cushion layer. At this time, the prestress transfer cylinder 5 can be adjusted to ensure that the prestress transfer device 4 has sufficient anchoring height. It should be noted that: the prestress transfer cylinder 5 made of a non-metallic material means that there is no metal on the outer surface of the prestress transfer cylinder 5, and it may or may not contain metal inside. Among them, Figure 7As shown in the figure, the prestress transfer cylinder 5 is provided with reinforcing bars 501 inside. The prestress transfer cylinder 5 has a central through-hole 502 extending in the vertical direction, and the anchor bar body 3 can pass through the central through-hole 502.

[0025] The construction method of the prestressed anti-floating anchor rod anchoring structure mainly includes the following steps: 1). After the construction of the anchor rod body 2 and the anchor bar body 3 of the prestressed anti-floating anchor rod is completed, the prestress transfer cylinder 5 and the prestress transfer device 4 are installed above the anchor rod body 2, and the anchor bar body 3 passes through the first plate member 401 and the second plate member 402 of the prestress transfer cylinder 5 and the prestress transfer device 4; 2). An anchor 6 is arranged on the second plate member 402 to perform prestress tensioning on the anchor bar body 3, and the prestress of the anchor bar body 3 is locked by the anchor 6; among them, a jacking device is used to tension the anchor bar body 3, for example, to make the anchor bar body 3 generate a resilience of 100 kN to 1000 kN. At this time, the tensioned anchor bar body 3 is locked by the anchor 6, then the second plate member 402 of the prestress transfer device 4 will bear a prestress of 100 kN to 1000 kN; finally, the prestress (pressure) received by the second plate member 402 will be sequentially transmitted downward to the prestress transfer cylinder 5 and the anchor rod body 2, and the top of the anchor rod body 2 is the reaction point; 3). The bottom plate 1 is constructed, and the prestress transfer cylinder 5, the prestress transfer device 4, the anchor 6 and the top end of the anchor bar body 3 are poured inside the bottom plate 1; when pouring the concrete of the bottom plate 1, the concrete will fill into the central through-hole 502 of the prestress transfer cylinder 5 through the holes of the first plate member 401 and the second plate member 402 of the prestress transfer device 4 (and the channels formed by the connecting members 403), so as to form a dense whole.

[0026] Embodiment 2 As Figure 8 , Figure 9 shown, the difference between Embodiment 2 and Embodiment 1 is that there are two or more prestress transfer cylinders 5, and two or more prestress transfer cylinders 5 are stacked in the vertical direction. The single prestress transfer cylinder 5 is made into a standard part, and the number of prestress transfer cylinders 5 can be adjusted according to specific design requirements, so that the elevation and anchoring bearing capacity can be adjusted while keeping the prestress transfer device 4 unchanged, without the need to customize specific prestress transfer devices 4 for different projects (different design requirements).

[0027] Embodiment 3 As Figures 10 - 12As shown, the difference between Embodiment 3 and Embodiment 2 is that the prestress transfer cylinder 5 is a conical cylinder, and its upper end diameter is smaller than the lower end diameter. In this way, when two or more prestress transfer cylinders 5 are stacked vertically, several steps will be formed on the outer surface of the overall prestress transfer cylinder 5, and the overall prestress transfer cylinder 5 will form an interlocking effect with the concrete of the bottom plate 1, which is beneficial to increasing the anchoring strength between the prestress transfer cylinder 5 and the bottom plate 1. Preferably, the central through hole 502 of the prestress transfer cylinder 5 is a conical hole, and the upper end diameter of the conical hole is larger than the lower end diameter. In this way, when two or more prestress transfer cylinders 5 are stacked vertically, several steps will be formed on the inner surface of the overall prestress transfer cylinder 5. When pouring the bottom plate 1, the concrete of the bottom plate 1 will be filled into the central through hole 502 of the prestress transfer cylinder 5 through the prestress transfer device 4, and the overall prestress transfer cylinder 5 will form an interlocking effect with the concrete of the bottom plate 1, which is beneficial to increasing the anchoring strength between the prestress transfer cylinder 5 and the bottom plate 1. Preferably, as Figure 11 shown, the upper and lower adjacent prestress transfer cylinders 5 are matched through a concave-convex structure (also called tongue-and-groove fit); as Figure 12 shown, the prestress transfer cylinder 5 and the prestress transfer device 4 can also be matched through a concave-convex structure; this is beneficial to the centering and positioning between adjacent components. Setting the prestress transfer cylinder 5 as a conical cylinder is also beneficial to the demoulding operation during its prefabrication.

[0028] In a preferred manner, as Figure 10 shown, the lowermost prestress transfer cylinder 5 forms an enlarged foundation, which helps to increase the bearing area.

[0029] Embodiment 4 As Figure 13 shown, the difference between Embodiment 4 and Embodiment 2 is that when the top elevation of the anchor rod body 2 is lower than that of the cushion 7, the number of prestress transfer cylinders 5 can be adjusted to ensure that the prestress transfer device 4 has sufficient anchoring height.

[0030] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A prestressed anti - floating anchor rod anchoring structure, which comprises a bottom plate (1), an anchor rod body (2) and an anchor rod reinforcement body (3). The upper end of the anchor rod reinforcement body (3) protrudes from the top surface of the anchor rod body (2), and is characterized in that: Above the anchor rod body (2), a prestress transfer device (4) and a prestress transfer cylinder (5) are provided. The prestress transfer device (4) is located above the prestress transfer cylinder (5). The prestress transfer device (4) is made of metal material, and the prestress transfer cylinder (5) is made of non-metal material; The prestress transfer device (4) includes a first plate member (401), a second plate member (402), and a connecting member (403) connecting the first plate member (401) and the second plate member (402). The second plate member (402) is located above the first plate member (401); An anchor (6) is provided above the second plate member (402). The anchor rod tendon (3) passes through the prestress transfer cylinder (5), the first plate member (401), and the second plate member (402). The top end of the anchor rod tendon (3) is fixedly connected to the anchor (6); The top ends of the prestress transfer device (4), the prestress transfer cylinder (5), the anchor (6), and the anchor rod tendon (3) are all accommodated inside the bottom plate (1).

2. The prestressed anti - floating anchor rod anchoring structure according to claim 1, characterized in that, The prestress transfer cylinder (5) is of concrete structure or reinforced concrete structure.

3. The prestressed anti - floating anchor rod anchoring structure according to claim 1 or 2, characterized in that, The prestress transfer cylinder (5) is a cylindrical tube, a square tube, a conical tube, or a polygonal tube.

4. The prestressed anti - floating anchor rod anchoring structure according to claim 1 or 2, characterized in that, There are two or more prestress transfer cylinders (5), and two or more of the prestress transfer cylinders (5) are stacked vertically.

5. The prestressed anti - floating anchor rod anchoring structure according to claim 4, characterized in that, The prestress transfer cylinder (5) is a conical tube, and its upper end diameter is smaller than the lower end diameter.

6. The prestressed anti - floating anchor rod anchoring structure according to claim 5, characterized in that, The central through hole (502) of the prestress transfer cylinder (5) is a conical hole, and the upper end diameter of the conical hole is larger than the lower end diameter.

7. The prestressed anti - floating anchor rod anchoring structure according to claim 4, characterized in that, Two adjacent prestress transfer cylinders (5) in the up and down direction are matched by a concave-convex structure.

8. The prestressed anti - floating anchor rod anchoring structure according to claim 1, characterized in that, The prestress transfer cylinder (5) and the prestress transfer device (4) are matched by a concave-convex structure.

9. The prestressed anti - floating anchor rod anchoring structure according to claim 1, characterized in that, The connecting member (403) is a cylindrical tube, a conical tube, several steel bars, or several plate members.

10. A construction method of a prestressed anti - floating anchor rod anchoring structure, used for constructing the prestressed anti - floating anchor rod anchoring structure according to any one of claims 1 - 9, mainly including the following steps: 1), After the construction of the anchor rod body (2) and the anchor rod tendon (3) of the prestress anti-floating anchor rod is completed, install the prestress transfer cylinder (5) and the prestress transfer device (4) above the anchor rod body (2). The anchor rod tendon (3) passes through the prestress transfer cylinder (5), the first plate member (401), and the second plate member (402) of the prestress transfer device (4); 2), Set an anchor (6) on the second plate member (402), perform prestress tension on the anchor rod tendon (3), and lock the prestress of the anchor rod tendon (3) with the anchor (6); 3), Construct the bottom plate (1), and pour the top ends of the prestress transfer cylinder (5), the prestress transfer device (4), the anchor (6), and the anchor rod tendon (3) inside the bottom plate (1).

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