Connection structure between prestressed anti-buoyancy anchor and structural base plate

Abstract

This utility model provides a connection structure between a prestressed anti-buoyancy anchor and a structural base slab. The connection structure includes: a primary concrete base slab; a secondary concrete base slab formed within the primary concrete base slab by an outer partition member; a prestressed anchor, longitudinally arranged, comprising: an anchoring section extending into the bottom of the anchor hole and fixed to the surrounding soil by grouting; a free section connected above the anchoring section, its lower section extending into the anchor hole and its upper section formed within the primary concrete base slab, extending to below the partition member; the free section is isolated from the outer grouting by a sleeve; and an anchor head section connected above the free section, extending upwards into the secondary concrete base slab within the partition member. This utility model eliminates the need for pre-reserved anchor heads, avoiding the secondary pouring process, ensuring the flatness of the base slab top surface, and improving construction efficiency and structural integrity.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a connection structure between a prestressed anti-buoyancy anchor and a structural base plate. Background Technology

[0002] In the field of construction engineering, the connection structure between prestressed anti-buoyancy anchors and the structural base slab has always been a key technical point and has received much attention. From the perspective of construction technology, if prestress is applied to the prestressed anti-buoyancy anchors before the structural base slab is poured, the prestress only acts on the foundation because the base slab does not form an effective constraint system. During the subsequent pouring of the base slab, the prestress is easily lost due to various factors such as concrete shrinkage, creep, and soil creep. Conversely, if prestress is applied after the structural base slab is poured, anchor heads and prestressed steel bar heads need to be reserved on the top surface of the base slab to meet the requirements of tensioning operations. This not only increases the complexity of the construction process, but also requires a second pour of thicker concrete to completely embed the anchor heads and prestressed steel bar heads, significantly increasing the amount of concrete used and the project investment cost. At the same time, improper treatment of the interface between the old and new concrete may also lead to quality problems such as leakage.

[0003] Therefore, developing a novel connection structure between prestressed anti-buoyancy anchor rods and post-cast structural base plates to effectively solve the above problems is of great practical significance for improving the safety, durability, and economy of engineering structures. Utility Model Content

[0004] I. Technical problems to be solved

[0005] This invention aims to solve at least partially one of the aforementioned technical problems.

[0006] II. Technical Solution

[0007] This utility model provides a connection structure between a prestressed anti-buoyancy anchor and a structural base plate. The connection structure includes:

[0008] The concrete base slab is poured in one go.

[0009] The secondary concrete base slab is formed inside the primary concrete base slab through an outer partition member;

[0010] Prestressed anchor bolts, which are installed longitudinally, include:

[0011] The anchoring section extends into the bottom of the anchor hole and is fixed to the surrounding soil by grouting.

[0012] The free section is connected above the anchoring section, with its lower section extending into the anchor bolt hole and its upper section formed in the single-poured concrete base slab, extending to the bottom of the separating component; the free section is isolated from the grouting body on the outside by a sleeve.

[0013] The anchor section is connected above the free section and extends upward into the secondary cast concrete base slab within the partition member.

[0014] In some embodiments of this utility model, the separating member is a box-shaped structure with an upward opening and a narrow top and wide bottom; the top surface of the box-shaped structure and the top surface of the secondary cast concrete base slab are flush with the top surface of the primary cast concrete base slab.

[0015] In some embodiments of this utility model, the separating component is a frustum box, which includes: a box frame, which is composed of frustum steel bars and tensioning pads through a welding process; and a sealing mesh, which is used to close the box frame around its perimeter; wherein the frustum box uses the tensioning pad as the bottom support surface and the top remains open.

[0016] In some embodiments of this utility model, the mesh surface of the closing mesh is corrugated, which prevents concrete aggregate from entering the truncated pyramid box and allows some concrete mortar to seep into the truncated pyramid box to form a rough surface.

[0017] In some embodiments of this utility model, the frustum reinforcement, tensioning pad, and closing mesh are welded to the upper layer of the structural base plate reinforcement mesh; the prestressed anchor rod passes through the reserved installation hole on the tensioning pad and extends upward into the frustum box; firstly, concrete is poured on the outside of the frustum box to form a primary concrete base plate, while the space inside the frustum box remains empty; secondly, concrete is poured inside the frustum box to form a secondary concrete base plate; the primary concrete base plate and the secondary concrete base plate are separated by a partition member, and the two together constitute the structural base plate.

[0018] In some embodiments of this utility model, the tensioning pad is located on the top surface of the first cast concrete base slab; inside the frustum box, an anchor plate is provided above the tensioning pad, and the anchor head section passes upward through the tensioning pad and the anchor plate; wherein, after the primary cast concrete base slab is formed, the top of the anchor head section is prestressed by the anchor, and after the prestressed anchor rod is tensioned, the prestressed anchor rod is locked by the anchor locking device; then concrete is poured inside the frustum box to form the secondary cast concrete base slab.

[0019] In some embodiments of this utility model, a waterproof rubber pad is provided between the tensioning pad and the anchor plate; wherein, a through hole for the prestressed anchor rod to pass through is provided in the middle of the waterproof rubber pad.

[0020] In some embodiments of this utility model, the free section of the prestressed anchor rod is isolated from the outer grouting body by an anti-corrosion sleeve; the gap between the free section of the prestressed anchor rod and the anti-corrosion sleeve is filled with asphalt or waterproof coating.

[0021] III. Beneficial Effects

[0022] As can be seen from the above technical solution, the present invention has at least one of the following beneficial effects compared with the prior art:

[0023] (1) Compared with the process of constructing the base plate first and then applying prestress, which requires anchor heads to be reserved on the top of the base plate and secondary concrete pouring to ensure the flatness of the bottom surface of the base plate, this utility model optimizes the arrangement of prestressed anchors, eliminating the need to reserve anchor heads and avoiding the secondary pouring process. This ensures the flatness of the top surface of the base plate and improves construction efficiency and structural integrity.

[0024] (2) In this utility model, the prestress is applied to the concrete structure base plate that is poured in one go. Compared with applying the prestress to the foundation, the loss of prestress can be effectively reduced.

[0025] (3) In this utility model, the truncated pyramid or truncated cone structure ensures that the construction joint between the primary and secondary concrete pouring is under pressure, which can effectively inhibit the water penetration path. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the connection structure between the prestressed anti-buoyancy anchor rod and the structural base plate in this utility model.

[0027] Figure 2 for Figure 1 Top view of the connection structure shown.

[0028] Figure 3 , Figure 4 , Figure 5 They are respectively Figure 1 The top view, side view, and oblique view of the frustum box in the connection structure shown.

[0029] Figure 6 This is a flowchart illustrating the connection method between the prestressed anti-buoyancy anchor rod and the structural base plate in an embodiment of this utility model. Detailed Implementation

[0030] This invention provides an overall solution that can effectively reduce prestress loss and improve the construction efficiency of prestressed anchor bolts.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and with reference to the accompanying drawings.

[0032] The first aspect of this utility model provides a connection structure between a prestressed anti-buoyancy anchor rod and a structural base plate. Figure 1 This is a cross-sectional view of the connection structure between the prestressed anti-buoyancy anchor rod and the structural base plate in this utility model. Figure 2 for Figure 1 A top view of the connection structure shown. (See attached image.) Figure 1 and Figure 2 As shown, the connection structure between the prestressed anti-buoyancy anchor and the structural base plate in this embodiment includes:

[0033] 11. Concrete base slab poured in one go;

[0034] The secondary concrete base slab 12 is formed inside the primary concrete base slab through the outer partition members.

[0035] Prestressed anchor rod 9, which is longitudinally arranged, includes:

[0036] Anchoring section 91 extends into the bottom of the anchor bolt hole and is fixed to the surrounding soil by grouting.

[0037] The free section 92 is connected above the anchoring section. Its lower section extends into the anchor bolt hole, and its upper section is formed in the single-poured concrete base slab, up to the bottom of the separating component. The free section is isolated from the grouting body on the outside by a sleeve.

[0038] Anchor section 93 is connected above the free section and extends upward into the secondary cast concrete base slab within the partition member.

[0039] The following sections will provide a detailed description of each component of the connection structure between the prestressed anti-buoyancy anchor and the structural base plate in this embodiment.

[0040] In this embodiment, the primary concrete base slab 11 and the secondary concrete base slab 12 together form the structural base plate, which are separated by a partition member.

[0041] Figure 3 , Figure 4 , Figure 5 They are respectively Figure 1 The attached drawings show a top view, side view, and oblique view of the frustum box in the connection structure. Referring to the drawings, in this embodiment, the separating component is a frustum box, which includes: a box frame, composed of frustum steel bars 1 and tensioning plates 6 welded together; and a sealing mesh 2, which encloses the box frame. The frustum box uses the tensioning plates 6 as its bottom support surface, and its top remains open. Furthermore, the top surface of the frustum box and the top surface of the secondary concrete base slab are flush with the top surface of the primary concrete base slab.

[0042] In this embodiment, the partition is a frustum box, but this invention is not limited to this. In other embodiments of this invention, the partition can also be other types of upward-opening, top-narrow-bottom-wide box structures, such as a frustum box. These variations can also achieve this invention and are also within the protection scope of this invention.

[0043] It should be noted that the partition component adopts a box-shaped structure design with an opening at the top and a narrow top and wide bottom. Its mechanical advantage is that when the bottom concrete is under load, the pressure is transmitted to the interface between the primary and secondary poured concrete bottom slabs. The narrow top structure restrains the secondary concrete from detaching from the bottom slab, keeping the interface under pressure. This pressure significantly enhances the interface friction resistance and improves the overall structural integrity.

[0044] In this embodiment, the mesh surface of the closing mesh 2 has a corrugated structure, which prevents concrete aggregate from entering the truncated pyramid box, while allowing some concrete mortar to seep into the truncated pyramid box to form a rough surface. This design enhances the bonding strength between the subsequent secondary concrete base slab and the previous primary concrete base slab, effectively replacing the manual roughening process.

[0045] In this embodiment, the frustum reinforcement 1, tensioning pad 6, and closing mesh 2 are welded to the upper layer of reinforcement mesh on the structural base slab; the prestressed anchor rod 9 passes through the reserved installation hole on the tensioning pad 6 and extends upward into the frustum box. In actual construction, firstly, concrete is poured on the outside of the frustum box to form a primary concrete base slab 11, while the space inside the frustum box remains empty; secondly, concrete is poured inside the frustum box to form a secondary concrete base slab 12; the primary concrete base slab 11 and the secondary concrete base slab 12 are separated by a partition component. After both pours are completed, the tensioning pad 6 is located on the top surface of the first concrete base slab and the bottom surface of the second concrete base slab.

[0046] Inside the frustum box, an anchor plate 4 is installed above the tensioning plate 6, and the anchor head section passes upward through the tensioning plate 6 and the anchor plate 4. After the primary concrete base slab is formed, the top of the anchor head section is prestressed by the anchor. After the prestressed anchor rod is tensioned, the prestressed anchor rod is locked by the anchor locking device. Then, concrete is poured inside the frustum box to form the secondary concrete base slab.

[0047] It should be noted that, compared to the process of constructing the base slab first and then applying prestress, which requires reserving anchor heads on the top of the base slab and necessitating a secondary concrete pour to ensure the flatness of the bottom surface of the base slab, this utility model optimizes the arrangement of prestressed anchors, eliminating the need to reserve anchor heads and avoiding the secondary pouring process. This not only ensures the flatness of the top surface of the base slab but also improves construction efficiency and structural integrity.

[0048] Furthermore, in this invention, the prestress is applied to the base slab of the single-poured concrete structure, which effectively reduces the loss of prestress compared to applying it to the foundation. In this invention, the truncated pyramid or frustum-shaped structure ensures that the construction joint between the single-poured and secondary-poured concrete is under pressure, effectively inhibiting moisture penetration.

[0049] Furthermore, in this embodiment, a waterproof rubber gasket 5 is provided between the tensioning plate 6 and the anchor plate 4; wherein, a through hole for the prestressed anchor rod to pass through is provided in the middle of the waterproof rubber gasket. The waterproof rubber gasket 5 has excellent elastic deformation capacity and dense filling characteristics, which can completely seal the gap between the anchor plate 4 and the plate 6, effectively blocking the seepage path of groundwater along the anchor rod to the structural base plate. When applied to water storage buildings (structures), the waterproof rubber gasket can also resist internal water pressure, prevent water from seeping out, solve the leakage problem caused by interface sealing failure in traditional secondary pouring parts, and significantly improve the waterproof performance and durability of the structure.

[0050] In this embodiment, after the anchor hole grouting and the initial pouring of the concrete base slab 11, the free section 92 of the prestressed anchor rod is isolated from the outer grouting body by the outer anti-corrosion sleeve 7, ensuring that the free section 92 and the upper anchor head section 93 can deform freely. Then, after the strength of the first poured concrete base slab 11 reaches the allowable anchor rod tension, the gap between the anti-corrosion sleeve 7 and the prestressed steel bar 9 is filled tightly with hot asphalt or a high-flow-rate waterproof coating. This sealing process effectively blocks the channels for groundwater to seep into the interior of the structural base slab along the gaps, ensuring the integrity and reliability of the underground engineering waterproofing system.

[0051] Based on the above-described connection structure between the prestressed anti-buoyancy anchor and the structural base plate, the following embodiment of the present invention provides a method for connecting the prestressed anti-buoyancy anchor and the structural base plate. All details of the connection structure between the prestressed anti-buoyancy anchor and the structural base plate in the previous embodiment are included in the connection method embodiment, and will not be repeated here.

[0052] Figure 6 This is a flowchart illustrating the connection method between the prestressed anti-buoyancy anchor and the structural base plate according to an embodiment of this utility model. Please refer to... Figures 1 to 5 , Figure 6 The connection method between the prestressed anti-buoyancy anchor and the structural base plate in this embodiment includes:

[0053] Step A: Prepare the partition components. The partition components are box-shaped structures that open upwards and are narrower at the top and wider at the bottom.

[0054] In this embodiment, the partition member is a frustum box. For example... Figure 1 , Figures 3 to 5 As shown, the frustum steel bar 1 and the tensioning plate 6 are welded together to form a frustum box skeleton. The frustum box skeleton is closed around the perimeter with a mesh 2. The tensioning plate 6 serves as the bottom support surface, and the top remains open, thus constructing a frustum box structure with an open top.

[0055] It should be noted that the box-shaped structure such as the truncated pyramid provides operating space for anchor bolt tensioning, ensuring that the construction joint between the primary and secondary concrete pours is under pressure, which can effectively inhibit the path of water penetration.

[0056] Furthermore, the mesh surface of the closing mesh 2 has a corrugated structure, which prevents concrete aggregate from entering the truncated pyramid box, while allowing some concrete mortar to seep into the truncated pyramid box to form a rough surface. This design enhances the bonding strength between the subsequent secondary concrete base slab and the previous primary concrete base slab, effectively replacing the manual roughening process.

[0057] Step B: Prepare prestressed anchor rods 9. The prestressed anchor rods include, from bottom to top: anchoring section 91, free section 92, and anchor head section 93. A sleeve is provided on the outside of the free section 92.

[0058] The prestressed anchor rod has a gap between its free section and the casing. Furthermore, a flexible sealing ring 8 is provided between the lower end of the free section and the corresponding position on the casing, to facilitate subsequent compaction of the gap between the free section and the casing.

[0059] Step C: Insert the anchoring section and the lower free section of the prestressed anchor rod into the anchor hole, and inject grout into the anchor hole to fix the anchoring section to the surrounding soil.

[0060] like Figure 1 As shown, during the construction process, the first step is to construct the prestressed anchor rod, which consists of grouting body 10 and prestressed steel bar 9, with steel bars reserved at the top for anchoring to the reinforced concrete base slab.

[0061] In this embodiment, the anchoring section is fixed to the surrounding soil and cannot deform freely; while the free section of the prestressed anchor rod also requires grouting, but the reinforcing steel in the free section is isolated from the grouting material by a sleeve, allowing for free deformation. The sleeve on the outside of the free section of the prestressed anchor rod is a corrosion-resistant sleeve. By isolating the free section 92 of the prestressed anchor rod from the outer grouting material through the outer corrosion-resistant sleeve 7, it is ensured that the free section 92 and the upper anchor head section 93 can deform freely.

[0062] Step D: Fix the partition member to the upper steel mesh of the structural base slab, and let the prestressed anchor rod pass upward through the bottom surface of the partition member; the anchor head section of the prestressed anchor rod extends into the partition member; the upper section of the free section is located below the partition member;

[0063] like Figure 1 As shown, during the binding of the structural base plate reinforcement 13, the frustum box, which consists of the tensioning pad 6, the frustum reinforcement 1, and the closing mesh 2, is welded and fixed to the upper layer of the structural base plate reinforcement mesh. At the same time, the prestressed reinforcement 9 reserved at the top passes through the reserved installation hole 14 on the tensioning pad to ensure accurate installation and positioning of each component.

[0064] Step E: Pour a concrete base slab, controlling the pouring range of the concrete to ensure that no concrete is filled inside the partition components.

[0065] In this step, after the structural base slab reinforcement 13 and the frustum box are installed, the first concrete structural base slab 11 is poured. The concrete pouring range is controlled to ensure that the internal space of the frustum box remains empty and is not filled with concrete. The frustum box acts as a partition component, effectively separating the primary concrete structural base slab 11 from the secondary concrete base slab 12, reserving space to meet the requirements of anchor bolt prestressing tensioning operations.

[0066] Step F: Fill the gap between the free section of the prestressed anchor rod and the outer sleeve with a tight seal.

[0067] In this step, after the first concrete structure base slab 11 reaches the strength required for anchor tensioning, the gap between the anti-corrosion sleeve 7 and the prestressed steel bar 9 is filled with hot asphalt or high-flow waterproof coating. This sealing process effectively blocks the channels for groundwater to seep into the structure base slab along the gaps, ensuring the integrity and reliability of the underground engineering waterproofing system.

[0068] Step G: In the partition component, install the waterproof rubber pad 5, anchor plate 4, and anchor 3 in sequence from bottom to top to perform prestressing tension. After the prestressed anchor rod is tensioned, use anchor locking device to lock the prestressed anchor rod to ensure that the prestressing force is not lost.

[0069] In this embodiment, the waterproof rubber gasket 5 possesses excellent elastic deformation capacity and dense filling characteristics, which can completely seal the gap between the anchor plate 4 and the pad plate 6, effectively blocking the seepage path of groundwater along the anchor rod to the structural base plate. When applied to water storage buildings (structures), this waterproof rubber gasket can also resist internal water pressure, prevent water from seeping out, solve the leakage problem caused by interface sealing failure in traditional secondary pouring parts, significantly improve the waterproof performance and durability of the structure, greatly enhance the reliability and durability of the overall structure, and reduce project investment.

[0070] In this step, the prestress applied to the prestressed anchor rods is transferred to the first-cast concrete structural base slab 11 through the tensioning plate 6, resisting the buoyancy of groundwater on the base slab in the vertical direction. Applying prestress to the first-cast concrete structural base slab effectively reduces prestress loss compared to applying prestress to the foundation. Furthermore, unlike pre-installing anchor heads in the structural base slab, which requires a second concrete pour to ensure the flatness of the base slab, this invention avoids this problem.

[0071] Step H involves secondary concrete pouring within the partition components, ensuring a tight bond between the secondary concrete pouring and the primary concrete structural base slab, forming a continuous structural base slab.

[0072] In this step, after the anchor bolts are tensioned, the construction of the second concrete pouring begins. The concrete is vibrated and compacted. By injecting the concrete into the truncated pyramid box and vibrating it to compact it, the second concrete pouring is tightly bonded to the primary concrete structural base slab 11, ultimately forming a complete and continuous structural base slab.

[0073] As explained above, in this embodiment, applying prestress to the concrete structural slab cast in a single pour effectively reduces prestress loss compared to the traditional method of applying prestress to the foundation. Compared to the process of constructing the slab first and then applying prestress, which requires anchor heads to be reserved at the top of the slab and a secondary pouring of concrete to ensure the flatness of the slab's bottom surface, this invention optimizes the arrangement of prestressed anchors, eliminating the need for pre-reserved anchor heads and avoiding the secondary pouring process. This ensures the flatness of the slab's top surface while improving construction efficiency and structural integrity.

[0074] This concludes the description of all embodiments of this utility model. Based on the above description, those skilled in the art should have a clear understanding of this utility model.

[0075] It should be noted that for some implementation methods, if they are not key contents of this utility model and are well known to those skilled in the art, they are not described in detail in the accompanying drawings or text due to space limitations. In such cases, relevant prior art can be referred to for understanding.

[0076] The ordinal numbers used in this utility model, such as "first", "second", and Arabic numerals and letters, to modify the corresponding elements (or steps), are intended only to make one element (or step) with a certain name clearly distinguishable from another element (or step) with the same name, and do not mean that the element (or step) has any ordinal number, nor do they represent the order of one element (or step) with another element (or step).

[0077] Unless otherwise specified or required to occur in sequence, the order of steps in this invention is not limited to those listed above and can be varied or rearranged as required by the design.

[0078] The directional terms used in this utility model, such as "center," "lateral," "longitudinal," "top," "bottom," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," indicate only the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, throughout the accompanying drawings, the same elements are represented by the same or similar reference numerals. Also, the shapes and dimensions of the components in the drawings do not reflect actual size and proportion, but only illustrate the content of embodiments of this utility model.

[0079] The terms "connected" and "linked" used in this utility model should be interpreted broadly unless otherwise explicitly specified and limited. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection of a portion of two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0080] Furthermore, the purpose of providing the above embodiments is merely to enable the present invention to meet legal requirements, and the present invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein.

[0081] Similarly, it should be understood that, for the sake of brevity, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this approach should not be construed as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, each aspect of the invention comprises fewer than all the features of the preceding single embodiment. Furthermore, embodiments may be used in combination with each other or with other embodiments based on design and reliability considerations; that is, technical features from different embodiments can be freely combined to form more embodiments. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the present invention.

[0082] The above specific embodiments have provided a detailed description of the purpose, technical means, and beneficial effects of this utility model. It should be understood that the purpose of the detailed description is to enable those skilled in the art to understand this utility model more clearly, and it is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A connection structure of a prestressed anti-floating anchor rod and a structural bottom plate, characterized by, include: The concrete base slab is poured in one go. The secondary concrete base slab is formed inside the primary concrete base slab through an outer partition member; Prestressed anchor bolts, which are installed longitudinally, include: The anchoring section extends into the bottom of the anchor hole and is fixed to the surrounding soil by grouting. The free section is connected above the anchoring section, with its lower section extending into the anchor bolt hole and its upper section formed in the single-poured concrete base slab, extending to the bottom of the separating component; the free section is isolated from the grouting body on the outside by a sleeve. The anchor section is connected above the free section and extends upward into the secondary cast concrete base slab within the partition member.

2. The connection structure between the prestressed anti-buoyancy anchor and the structural base plate according to claim 1, characterized in that, The dividing component is a box-like structure that opens upwards and is narrower at the top and wider at the bottom; The top surface of the box-shaped structure and the top surface of the secondary concrete base slab are flush with the top surface of the primary concrete base slab.

3. The connecting structure of the prestressed anti-floating anchor rod and the structural bottom plate according to claim 2, characterized in that, The partition member is a frustum box, which includes: The box frame is composed of frustum-shaped steel bars and tensioning pads through a welding process. The sealing mesh is used to seal the box frame from all sides. The truncated pyramid box uses a tensioning pad as its bottom support surface, while its top remains open.

4. The connecting structure of the prestressed anti-floating anchor rod and the structural bottom plate according to claim 3, characterized in that, The mesh surface of the closing mesh has a corrugated structure, which prevents concrete aggregate from entering the truncated pyramid box, while allowing some concrete mortar to seep into the truncated pyramid box to form a rough surface.

5. The connection structure between the prestressed anti-buoyancy anchor and the structural base plate according to claim 3, characterized in that, The frustum-shaped steel bars, tensioning pads, and closing mesh are welded to the upper layer of steel mesh on the structural base plate; The prestressed anchor rod passes through the reserved installation hole on the tensioning pad and extends upward into the frustum box; First, concrete is poured on the outside of the frustum box to form a primary concrete base slab, while the space inside the frustum box remains empty. Second, concrete is poured inside the frustum box to form a secondary concrete base slab. The primary and secondary concrete base slabs are separated by a partition, and together they constitute the structural base slab.

6. The connection structure between the prestressed anti-buoyancy anchor and the structural base plate according to claim 5, characterized in that, The tensioning pad is located on the top surface of the first poured concrete base slab; Inside the frustum box, an anchor plate is provided above the tensioning pad, and the anchor head section passes upward through the tensioning pad and the anchor plate; In this process, after the initial concrete base slab is formed, the top of the anchor head section of the anchorage is prestressed. After the prestressed anchor rod is tensioned, the prestressed anchor rod is locked with an anchoring lock. Then, concrete is poured into the truncated pyramid box to form the secondary concrete base slab.

7. The connection structure between the prestressed anti-buoyancy anchor and the structural base plate according to claim 6, characterized in that, A waterproof rubber gasket is provided between the tensioning pad and the anchor plate; The waterproof rubber pad has a through hole in the middle for the prestressed anchor rod to pass through.

8. The connection structure between the prestressed anti-buoyancy anchor rod and the structural base plate according to any one of claims 1 to 7, characterized in that, The free section of the prestressed anchor rod is isolated from the outer grouting body by an anti-corrosion sleeve; The gap between the free section of the prestressed anchor and the anti-corrosion sleeve is filled with asphalt or waterproof coating.

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