Fabricated multifunctional anchor sealing base of concave type post-tensioning method anti-floating anchor rod

Abstract

An assembly type multifunctional anchor sealing base of a concave type post-tensioning method anti-floating anchor rod relates to the field of construction of anti-floating anchor rods of constructional engineering and comprises a steel pipe, a perforated steel plate and steel bar supporting legs, the perforated steel plate is provided with steel plate holes, and the steel plate holes are located in the middle of the perforated steel plate and correspond to prestressed steel strands of the anti-floating anchor rod respectively. The four steel bar supporting legs are welded to the four corners of the lower portion of the perforated steel plate respectively, and the steel pipe is welded to the center of the upper portion of the perforated steel plate to form an anchor sealing base. By means of the concave type post-tensioning anti-floating anchor rod anchoring node, the construction difficulty of the concave type post-tensioning anti-floating anchor rod anchoring node can be reduced, the construction progress is accelerated, and the requirements of building functions can be met with relatively few resources.

Description

Technical Field

[0001] The utility model relates to the field of anti-floating anchor rod construction in construction engineering, in particular to an assembled multifunctional anchor sealing base of a concave post-tensioned anti-floating anchor rod. Background Art

[0002] With the advancement of engineering technology, above-ground space resources are becoming increasingly scarce, prompting engineers to continuously develop underground space. As building foundations continue to deepen, the impact of groundwater on structures is becoming increasingly severe. Insufficient anti-floating capacity can cause underground structures to float or the floor to bulge, leading to floor damage, cracking at beam-column joints, and water seepage in the basement, seriously impacting the building's structural performance. Currently, common anti-floating measures in engineering projects include weighting, pull-out piles, or anti-floating anchors. Anti-floating anchors offer significant advantages in terms of project cost and construction schedule.

[0003] There are still many areas that can be optimized for the on-site construction of recessed post-tensioned anti-floating anchors. For example, the traditional method requires formwork treatment, and the thickness of the base plate should not be too small. Shear damage to the concrete must be prevented during tensioning. The diameter of the tensioning interface at the traditional anchoring node is large, and the collision area between the plate surface reinforcement and the anchoring node is further increased. There are more avoidance areas for the plate surface reinforcement, which increases the construction difficulty and prolongs the construction time. Therefore, the utility model proposes an assembled multifunctional anchor sealing base for recessed post-tensioned anti-floating anchors to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an assembled multifunctional anchor sealing base for a concave post-tensioned anti-floating anchor rod, which can greatly speed up the construction progress and reduce the construction difficulty.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an assembled multifunctional anchor sealing base for a concave post-tensioned anti-floating anchor rod, comprising a steel pipe, a perforated steel plate and a steel support leg. The perforated steel plate is provided with a steel plate hole, and the steel plate hole is located in the middle position of the perforated steel plate, corresponding to the position of the prestressed steel strand of the anti-floating anchor rod. There are four steel support legs, which are respectively welded at the four corners of the lower part of the perforated steel plate, and the steel pipe is welded to the upper center position of the perforated steel plate to form an anchor sealing base.

[0006] Furthermore, there are four holes in the steel plate, and the aperture size of each hole in the steel plate is the diameter of the prestressed steel strand of the anti-floating anchor rod + 5mm.

[0007] Furthermore, the steel support legs are made of Φ12 steel bars, and the length is adjusted according to the height difference between the cushion layer and the plate surface structure elevation, and then the height of the anchor base is adjusted, and the bottom plate concrete pouring height is flush with the top of the steel pipe.

[0008] Furthermore, it also includes an anchor and an anti-floating anchor rod prestressed steel strand, wherein the anti-floating anchor rod prestressed steel strand passes through the steel plate holes on the perforated steel plate and is tensioned and locked by the anchor.

[0009] Furthermore, a steel mesh is placed inside the steel pipe, and a micro-expansion anti-seepage high-strength grouting material is poured into the steel pipe to complete the anchor sealing, so that the anchor sealing node meets the requirements of strength, waterproofness and anti-seepage.

[0010] Compared with the existing technology, the utility model can reduce the construction difficulty of the recessed post-tensioned anti-floating anchor node, and can meet the requirements of building functions with relatively few resources. It has the following advantages: ① The anchor base is an assembled component with a simple construction process and quick installation, which can reduce the on-site construction operation steps, reduce the construction difficulty, and speed up the construction progress; ② The entire construction process of the anti-floating anchor node is green and environmentally friendly, and almost no construction waste is generated. The anchor nodes are all supported and lifted by the anchor base, and no formwork treatment is required; ③ The bottom of the anchor base adopts a perforated steel plate with a larger cross-sectional size, which increases the contact area with the concrete when the anti-floating anchor is tensioned, can evenly disperse the concentrated stress, and prevent the concrete from shear failure; ④ The height of the anchor node raised by the anchor base can be adjusted by manual welding, which is suitable for the height difference from different cushion layer elevations to the bottom plate structure surface layer; ⑤ The anchor node of the recessed anti-floating anchor is embedded in the structural layer, which can protect the anchor from damage during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0012] Figure 2 for Figure 1 a top view of the illustrated embodiment;

[0013] Figure 3 This is a schematic diagram of the anchor node structure after the concave post-tensioned anti-floating anchor is tensioned and locked;

[0014] Figure 4 for Figure 3 A top view of the anchor node shown;

[0015] Description of reference numerals in the figures:

[0016] 1. Steel pipe; 2. Perforated steel plate; 3. Steel support leg; 4. Holes in the steel plate; 5. Anchor; 6. Prestressed steel strand for anti-floating anchor rods; 7. Steel mesh. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings and embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Reference Figures 1 to 4 A multifunctional assembled anchor base for a concave post-tensioned anti-floating anchor rod comprises a steel pipe 1, a perforated steel plate 2 and a steel support leg 3. The perforated steel plate 2 is provided with a steel plate hole 4, and the steel plate hole 4 is located in the middle position of the perforated steel plate 2, corresponding to the position of the prestressed steel strand of the anti-floating anchor rod. There are four steel support legs 3, which are respectively welded at the four corners of the lower part of the perforated steel plate 2, and the steel pipe 1 is welded to the upper center position of the perforated steel plate 2 to form an anchor base.

[0019] In this embodiment, the dimensions of the perforated steel plate 2 are (D + 100mm*2) × (D + 100mm*2) × 20mm, where D is the diameter of the anti-floating anchor rod. For a concave post-tensioned anti-floating anchor rod, D is 220mm, resulting in a cross-sectional dimension of 420mm × 420mm × 20mm. When the anti-floating anchor rod is tensioned and locked, the perforated steel plate serves as a supporting pad. Compared to traditional pads, its larger cross-sectional dimensions effectively increase the load-bearing area of ​​the concrete slab and prevent shear failure of the slab.

[0020] In this embodiment, there are four steel plate holes 4, and the aperture size of each steel plate hole 4 is the diameter of the anti-floating anchor prestressed steel strand + 5mm. The diameter of the anti-floating anchor prestressed steel strand is 15mm, and the cross-sectional size is 20mm.

[0021] In this embodiment, the steel support legs 3 use Φ12 steel bars, and the length is adjusted according to the height difference between the cushion layer and the plate surface structure elevation, and then the height of the anchor base is adjusted, and the bottom plate concrete pouring height is flush with the top of the steel pipe 1.

[0022] The steel pipe 1, perforated steel plate 2 and steel support legs 3 described in this embodiment are the side formwork, bottom formwork and four corner support legs of the anchor base respectively, forming an assembled multifunctional anchor base with formwork-free function, liftable anchor rod nodes and protection against shear damage of the bottom plate concrete.

[0023] In this embodiment, an anchor 5 and an anti-floating anchor prestressed steel strand 6 are further included. The anti-floating anchor prestressed steel strand 6 passes through the steel plate holes 4 on the perforated steel plate 2 and the anchor 5 and is tensioned and locked.

[0024] In this embodiment, the anti-floating anchor rod prestressed steel strand 6 inside the steel pipe 1 is subjected to a tension locking test. The steel pipe 1 has an inner diameter of 250 mm, a height of 100 mm, and a thickness of 3 mm, which fits the test operation surface and can reduce the collision area with the plate surface steel bars. After the test is completed, the excess anti-floating anchor rod prestressed steel strand 6 is cut off. The exposed length after cutting should not be less than 30 mm and should not be greater than 50 mm.

[0025] In this embodiment, a Φ4@50×50 steel mesh 7 is placed inside the steel pipe 1, and a slightly expansive, anti-seepage, high-strength grouting material is poured into the steel pipe 1 to complete the anchor sealing, so that the anchor sealing node meets the strength and waterproof and anti-seepage requirements.

[0026] Working process:

[0027] First, drill holes for anti-floating anchor rods, then place the prestressed steel strands 6 for the anti-floating anchor rods and grout them to construct waterproof nodes.

[0028] Then, the bottom plate lower reinforcement is constructed, and the anchor base formed by welding the steel pipe 1, the perforated steel plate 2, and the steel support leg 3 is placed at the anti-floating anchor drilling position, and the four anti-floating anchor prestressed steel strands 6 are respectively passed through the anchor base steel plate holes 4, and then the bottom plate upper reinforcement is constructed;

[0029] Use bagged foam to temporarily seal the steel pipe 1, pour the bottom plate concrete, and after the bottom plate concrete solidifies, remove the sealing material. After the anti-floating anchor grouting body reaches the age and meets the strength requirements, complete the tensioning of the anti-floating anchor prestressed steel strand 6;

[0030] Finally, after the tensioning is completed, the steel strands are cut, a steel mesh 7 is arranged in the steel pipe 1, and a micro-expansion, anti-permeability, high-strength grouting material is poured.

[0031] Although the embodiments of the present invention have been shown and described above, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An assembled multifunctional anchor base for a concave post-tensioned anti-floating anchor, characterized by: It includes a steel pipe, a perforated steel plate and steel support legs. The perforated steel plate is provided with a steel plate hole. The steel plate hole is located in the middle position of the perforated steel plate and corresponds to the position of the prestressed steel strands of the anti-floating anchor rod. There are four steel support legs, which are welded at the four corners of the lower part of the perforated steel plate respectively. The steel pipe is welded to the upper center position of the perforated steel plate to form an anchor base.

2. The assembled multifunctional anchor sealing base of the recessed post-tensioned anti-floating anchor according to claim 1 is characterized by: There are four holes in the steel plate, and the diameter of each hole in the steel plate is the diameter of the prestressed steel strand of the anti-floating anchor rod + 5mm.

3. The assembled multifunctional anchor sealing base of the recessed post-tensioned anti-floating anchor according to claim 1 or 2, characterized in that: The steel support legs are made of Φ12 steel bars, and the length is adjusted according to the height difference between the cushion layer and the plate surface structure elevation, and then the height of the anchor base is adjusted. The bottom plate concrete pouring height is flush with the top of the steel pipe.

4. The assembled multifunctional anchor sealing base of the recessed post-tensioned anti-floating anchor according to claim 1 or 2, characterized in that: The invention also comprises an anchor and an anti-floating anchor rod prestressed steel strand, wherein the anti-floating anchor rod prestressed steel strand passes through the steel plate holes on the perforated steel plate and is tensioned and locked by the anchor.

5. The assembled multifunctional anchor sealing base of the recessed post-tensioned anti-floating anchor according to claim 4 is characterized by: A steel mesh is placed inside the steel pipe, and a micro-expansion anti-seepage high-strength grouting material is poured into the steel pipe to complete the anchor sealing.

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