Tensioning device for pressure type prestress anti-floating anchor rod

Abstract

The utility model provides a tensioning device for a pressure type prestress anti-floating anchor rod, which comprises an upper support plate, a lower support plate and a plurality of support rods, the upper support plate and the lower support plate are horizontally arranged at intervals up and down, the upper support plate and the lower support plate are respectively and vertically provided with an upper through hole and a lower through hole, and the upper through hole is communicated with the lower through hole. The upper penetrating holes and the lower penetrating holes are vertically formed in a spaced mode, the supporting rods are vertically arranged, located between the upper supporting plate and the lower supporting plate and connected with the upper supporting plate and the lower supporting plate respectively, and the multiple supporting rods horizontally surround the upper penetrating holes and the lower penetrating holes, are horizontally arranged in a spaced mode and are arranged between a steel base plate and a hydraulic center hole jack when used. According to the utility model, the anchor rod can be tensioned and pre-compressive stress can be applied, the cushion layer can be prevented from being damaged by the tensioning of the anchor rod, the problems of insufficient pre-stress application, low pre-stress application efficiency and serious pre-stress loss of the anchor rod in the actual construction process can be effectively solved, the leakage risk of a basement is reduced, and the overall anti-floating capability of the structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to the technical field of pressure-type prestressed anti-floating anchor rods, and specifically refers to a tensioning device for pressure-type prestressed anti-floating anchor rods. Background Art

[0002] Building construction refers to the production activities in the implementation stage of engineering construction. It is the construction process of various buildings. It can also be said to be the process of turning various lines on the design drawings into physical objects at designated locations. It includes foundation engineering construction, main structure construction, roof engineering construction, decoration engineering construction, etc.

[0003] According to Article 7.5.8 of the "Technical Standard for Anti-floating of Construction Engineering" JGJ476-2019, clear provisions are made for the design of cracks in the anchor body of anti-floating anchor rods: 1) For projects with Class A anti-floating design grade, the design is based on no cracks, and no tensile stress should be generated in the anchor slurry under the standard combination of load effects; 2) For projects with Class B anti-floating design grade, the design is based on crack control, and the tensile stress in the anchor slurry should not be greater than the axial tensile strength of the anchor slurry under the standard combination of load effects.

[0004] According to the requirements of the specification, it is designed as a non-bonded pressure-type prestressed anti-floating anchor. The force-bearing mode of the prestressed anti-floating anchor is active force, that is, when the structure does not generate a large buoyancy, the prestressed anti-floating anchor still generates a downward pulling force on the bottom plate of the structure; when the structure is subjected to an upward buoyancy, it is necessary to first offset the previously applied prestress, and then the prestressed anti-floating anchor's own anti-floating ability, which is equivalent to an additional guarantee. The prestressed anti-floating anchor can achieve a better anti-floating effect. According to different design requirements, anti-floating anchors are mainly divided into two forms: ordinary anti-floating anchors and prestressed anti-floating anchors. The construction technology of ordinary anti-floating anchors is mature. Compared with ordinary anti-floating anchors, prestressed anti-floating anchors have an additional step of applying prestress, and this process is crucial.

[0005] The conventional construction process of pressure-type prestressed anti-floating anchors is to tension them on the top of the raft, which poses a great risk of basement leakage. In order to eliminate the hidden danger of basement leakage, independent technical research and optimization are carried out, and the tensioning construction on the top of the raft foundation is optimized to cushion tensioning, that is, a steel pad is set on the concrete anchor body and then tensioned. Specifically, the prestressed anti-floating anchor is set vertically, the concrete anchor body is set vertically and vertically sleeved on the outside of the prestressed anti-floating anchor, the steel pad is set horizontally and vertically sleeved on the prestressed anti-floating anchor and rests on the concrete anchor body, and the hydraulic through-hole jack is vertically sleeved on the prestressed anti-floating anchor and rests on the steel pad. On the plate, the matching anchor plate is set horizontally, the matching anchor plate is vertically sleeved on the prestressed anti-floating anchor rod and meshed with the prestressed anti-floating anchor rod thread and rests on the hydraulic through-hole jack, and then the tensioning construction is carried out. The hydraulic through-hole jack rests on the steel pad through the lower part, and the upper oil cylinder is extended. The matching anchor plate and the prestressed anti-floating anchor rod are subjected to upward tension, but the cushion layer is easily damaged by the anchor rod tensioning. In the actual construction process, the anchor rod prestressing is insufficient, the prestressing efficiency is low, and the prestressing loss is serious.

[0006] Therefore, it is hoped to provide a tensioning device for pressure-type prestressed anti-floating anchor rods, which can tension the anchor rods themselves and apply pre-compression stress, and can prevent the cushion layer from being damaged by the tensioning of the anchor rods. It can effectively solve the problems of insufficient prestressing of the anchor rods, low efficiency of prestressing, and serious prestressing loss during actual construction, reduce the risk of basement leakage, and improve the overall anti-floating ability of the structure. Utility Model Content

[0007] In order to overcome the shortcomings of the above-mentioned prior art, one purpose of the utility model is to provide a tensioning device for pressure-type prestressed anti-floating anchor rods, which can tension the anchor rods themselves and apply pre-compression stress, and can prevent the cushion layer from being damaged by the tensioning of the anchor rods. It can effectively solve the problems of insufficient prestressing of anchor rods, low efficiency of prestressing and serious prestressing loss during actual construction, reduce the risk of basement leakage, improve the overall anti-floating ability of the structure, and is suitable for large-scale promotion and application.

[0008] Another object of the utility model is to provide a tensioning device for pressure-type prestressed anti-floating anchor rods, which has a clever design, a simple structure, is easy to manufacture, has a low manufacturing cost, and is suitable for large-scale promotion and application.

[0009] In order to achieve the above purpose, the utility model provides a tensioning device for a pressure-type prestressed anti-floating anchor rod, which is characterized by comprising an upper support plate, a lower support plate and a plurality of support rods, wherein:

[0010] The upper support plate and the lower support plate are both horizontally arranged and spaced apart from each other up and down, the upper support plate and the lower support plate are respectively vertically provided with upper through holes and lower through holes, the upper through holes and the lower through holes are spaced apart from each other up and down, the support rod is vertically arranged, the support rod is located between the upper support plate and the lower support plate and respectively connects the upper support plate and the lower support plate, and a plurality of the support rods are horizontally arranged around the upper through holes and the lower through holes and spaced apart from each other horizontally.

[0011] Preferably, the upper support plate and the lower support plate are both circular plates.

[0012] More preferably, the diameter of the upper support plate and the diameter of the lower support plate are both 25 cm, and the thickness of the upper support plate and the thickness of the lower support plate are both 25 mm.

[0013] Preferably, the upper support plate and the lower support plate are both steel plates.

[0014] Preferably, the upper through hole and the lower through hole are both round holes.

[0015] More preferably, the diameter of the upper through hole and the diameter of the lower through hole are both 10 cm.

[0016] Preferably, the support rod is a steel support rod.

[0017] Preferably, the support rod is a support plate.

[0018] More preferably, the thickness of the support plate is 20 mm, and the height of the support plate is 200 mm.

[0019] Preferably, the number of the support rods is 4, and the 4 support rods are distributed at the 4 corners of a rectangle.

[0020] The beneficial effects of the utility model are mainly:

[0021] 1. The tensioning device for pressure-type prestressed anti-floating anchor rod of the utility model comprises an upper support plate, a lower support plate and a plurality of support rods, the upper support plate and the lower support plate are both horizontally arranged and spaced apart from each other up and down, the upper support plate and the lower support plate are respectively vertically provided with an upper through hole and a lower through hole, the upper through hole and the lower through hole are spaced apart from each other up and down, the support rod is vertically arranged, the support rod is located between the upper support plate and the lower support plate and respectively connects the upper support plate and the lower support plate, the plurality of support rods are horizontally arranged around the upper through hole and the lower through hole and spaced apart from each other horizontally, when in use, they are placed between the steel pad and the hydraulic through-hole jack, therefore, it can tension the anchor rod itself and apply pre-compression stress, and can prevent the cushion layer from being damaged by the tensioning of the anchor rod, can effectively solve the problems of insufficient prestressing of the anchor rod, low efficiency of prestressing and serious loss of prestressing in the actual construction process, reduce the risk of basement leakage, improve the overall anti-floating ability of the structure, and is suitable for large-scale promotion and application.

[0022] 2. The tensioning device for pressure-type prestressed anti-floating anchor rods of the utility model comprises an upper support plate, a lower support plate and a plurality of support rods. The upper support plate and the lower support plate are both horizontally arranged and spaced apart from each other up and down. The upper support plate and the lower support plate are respectively vertically provided with upper through holes and lower through holes. The upper through holes and the lower through holes are spaced apart from each other up and down. The support rods are vertically arranged. The support rods are located between the upper support plate and the lower support plate and are respectively connected to the upper support plate and the lower support plate. The plurality of support rods are horizontally arranged around the upper through holes and the lower through holes and spaced apart from each other horizontally. Therefore, the utility model has ingenious design, simple structure, simple manufacturing, low manufacturing cost, and is suitable for large-scale promotion and application.

[0023] These and other objects, features and advantages of the present invention are fully reflected in the following detailed description and drawings, and can be achieved by the means, devices and their combinations specifically pointed out in the content of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of a specific embodiment of the tensioning device for pressure-type prestressed anti-floating anchor rods of the utility model.

[0025] Figure 2 yes Figure 1 The illustrated embodiment is a three-dimensional schematic diagram when in use.

[0026] (Explanation of symbols)

[0027] 1 tensioning device for pressure-type prestressed anti-floating anchor rod; 2 upper support plate; 3 lower support plate; 4 support rod; 5 upper perforation; 6 lower perforation; 7 prestressed anti-floating anchor rod; 8 concrete anchor body; 9 steel pad; 10 fastening nut; 11 hydraulic through-hole jack; 12 matching anchor plate; 13 jack oil pipe. DETAILED DESCRIPTION

[0028] In order to more clearly understand the technical content of the present invention, the following embodiments are given in detail.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] See also Figure 1 As shown, in a specific embodiment of the utility model, the tensioning device 1 for the pressure-type prestressed anti-floating anchor rod of the utility model comprises an upper support plate 2, a lower support plate 3 and a plurality of support rods 4, wherein:

[0031] The upper support plate 2 and the lower support plate 3 are both horizontally arranged and spaced apart from each other up and down. The upper support plate 2 and the lower support plate 3 are respectively vertically provided with upper through holes 5 and lower through holes 6. The upper through holes 5 and the lower through holes 6 are spaced apart from each other up and down. The support rod 4 is vertically arranged. The support rod 4 is located between the upper support plate 2 and the lower support plate 3 and respectively connects the upper support plate 2 and the lower support plate 3. Multiple support rods 4 are horizontally arranged around the upper through holes 5 and the lower through holes 6 and are horizontally spaced apart from each other.

[0032] The upper support plate 2 and the lower support plate 3 may have any suitable shape. Figure 1 As shown, in a specific embodiment of the present invention, the upper support plate 2 and the lower support plate 3 are both circular plates.

[0033] The size of the upper support plate 2 and the size of the lower support plate 3 can be determined as needed. In a specific embodiment of the present invention, the diameter of the upper support plate 2 and the diameter of the lower support plate 3 are both 25 cm, and the thickness of the upper support plate 2 and the thickness of the lower support plate 3 are both 25 mm.

[0034] The upper support plate 2 and the lower support plate 3 can be support plates made of any suitable material. In a specific embodiment of the present invention, the upper support plate 2 and the lower support plate 3 are both steel plates, such as Q325B steel plates.

[0035] The upper through hole 5 and the lower through hole 6 may have any suitable shape. Figure 1 As shown, in a specific embodiment of the present utility model, the upper through hole 5 and the lower through hole 6 are both round holes.

[0036] The diameter of the upper through hole 5 and the diameter of the lower through hole 6 can be determined as needed. In a specific embodiment of the present utility model, the diameter of the upper through hole 5 and the diameter of the lower through hole 6 are both 10 cm.

[0037] The support rod 4 can be a support rod made of any suitable material. In a specific embodiment of the present invention, the support rod 4 is a steel support rod, such as a Q325B steel support rod.

[0038] The support rod 4 may have any suitable shape. In a specific embodiment of the present invention, the support rod 4 is a support plate.

[0039] The size of the support plate can be determined as needed. In a specific embodiment of the present invention, the thickness of the support plate is 20 mm, and the height of the support plate is 200 mm.

[0040] The number of the support rods 4 can be determined as needed. The above-mentioned "multiple" refers to more than 2. Figure 1 As shown, in a specific embodiment of the present utility model, the number of the support rods 4 is 4, and the 4 support rods 4 are distributed at the 4 corners of a rectangle.

[0041] When using, see Figure 2As shown, the prestressed anti-floating anchor 7 adopts PSB1080 prestressed steel bars, which are arranged vertically. The concrete anchor body 8 is arranged vertically and vertically sleeved on the outside of the prestressed anti-floating anchor 7. The steel pad 9 is arranged horizontally and vertically sleeved on the prestressed anti-floating anchor 7 and abuts on the concrete anchor body 8. The fastening nut 10 is screwed on the prestressed anti-floating anchor 7 and abuts on the steel pad 9. The utility model is vertically sleeved on the prestressed anti-floating anchor 7 through the upper through hole 5 and the lower through hole 6 and vertically sleeved on the outside of the fastening nut 10 and the steel pad 9 through the lower through hole 6 and abuts on the concrete anchor body 8 through the lower support plate 3 (the size of the lower through hole 6 is larger than the size of the fastening nut 10 and the size of the steel pad 9, so as to facilitate the vertical passage of the nut 10 and the steel pad 9). The hydraulic through-hole jack 11 is vertically sleeved on the prestressed anti The floating anchor rod 7 is on the upper support plate 2 of the utility model, and the matching anchor plate 12 is arranged horizontally. The matching anchor plate 12 is vertically sleeved on the prestressed anti-floating anchor rod 7 and is threadedly engaged with the prestressed anti-floating anchor rod 7 and rests on the hydraulic through-hole jack 11, and then the tensioning construction is carried out. The hydraulic through-hole jack 11 rests on the utility model through the lower part, and the upper oil cylinder is extended. The matching anchor plate 12 is also subjected to upward tension with the prestressed anti-floating anchor rod 7. After the tensioning is completed, the construction personnel use a pipe clamp to tighten the fastening nut 10 through the gap between the support rods 4, so that the fastening nut 10 is tightly against the steel pad 9, and the steel pad 9 is tightly against the concrete anchor body 8, so that the prestressed anti-floating anchor rod 7 cannot shrink after being subjected to tension, and at the same time, prestress is also applied to the prestressed anti-floating anchor rod 7 itself.

[0042] Therefore, in order to prevent the cushion layer from being damaged by the tensioning of the anchor rod, the inventors refer to the tensioning process of prestressed components and design a new type of prestressed anti-floating anchor tensioning device to tension the anchor rod itself and apply prestress. The utility model includes an upper support plate, a lower support plate and a plurality of support rods. The upper support plate and the lower support plate can be made of, for example, steel plates, and the support rods can be made of, for example, steel support plates. It has the characteristics of convenient material acquisition, low cost, convenient use, and high practicality. The utility model is adopted, by setting the utility model between the concrete anchor body and the hydraulic through-hole jack, and the utility model is sleeved outside the fastening nut and the steel pad, which can not only prevent the cushion layer from being damaged by the tensioning of the anchor rod, but also significantly improve the construction efficiency of the workers, and the prestress loss is controlled within the specified range, and the expected engineering effect can be easily achieved, effectively solving the problems of insufficient prestressing of the anchor rod, low prestressing efficiency and serious prestressing loss in the actual construction process, greatly reducing the risk of basement leakage, and greatly improving the overall anti-floating ability of the structure.

[0043] In summary, the tensioning device for pressure-type prestressed anti-floating anchor rods of the utility model can tension the anchor rods themselves and apply pre-compression stress, and can prevent the cushion layer from being damaged by the tensioning of the anchor rods. It can effectively solve the problems of insufficient prestressing of anchor rods, low efficiency of prestressing and serious prestressing loss in actual construction processes, reduce the risk of basement leakage, and improve the overall anti-floating ability of the structure. It has a clever design, a simple structure, is easy to manufacture, and has a low manufacturing cost, and is suitable for large-scale promotion and application.

[0044] It can be seen that the purpose of the utility model has been completely and effectively achieved. The function and structural principle of the utility model have been demonstrated and explained in the embodiments. Without departing from the principles, the implementation methods can be modified arbitrarily. Therefore, the utility model includes all modified implementation methods based on the spirit and scope of the claims.

Claims

1. A tensioning device for a pressure-type prestressed anti-floating anchor, characterized in that: It includes an upper support plate, a lower support plate and a plurality of support rods, wherein: The upper support plate and the lower support plate are both horizontally arranged and spaced apart from each other up and down, the upper support plate and the lower support plate are respectively vertically provided with upper through holes and lower through holes, the upper through holes and the lower through holes are spaced apart from each other up and down, the support rod is vertically arranged, the support rod is located between the upper support plate and the lower support plate and respectively connects the upper support plate and the lower support plate, and a plurality of the support rods are horizontally arranged around the upper through holes and the lower through holes and spaced apart from each other horizontally.

2. The tensioning device for the pressure-type prestressed anti-floating anchor according to claim 1, characterized in that: The upper support plate and the lower support plate are both circular plates.

3. The tensioning device for the pressure-type prestressed anti-floating anchor according to claim 2, characterized in that: The diameter of the upper support plate and the diameter of the lower support plate are both 25 cm, and the thickness of the upper support plate and the thickness of the lower support plate are both 25 mm.

4. The tensioning device for the pressure-type prestressed anti-floating anchor according to claim 1, characterized in that: The upper support plate and the lower support plate are both steel plates.

5. The tensioning device for pressure-type prestressed anti-floating anchor according to claim 1, characterized in that: The upper through hole and the lower through hole are both round holes.

6. The tensioning device for the pressure-type prestressed anti-floating anchor as claimed in claim 5, characterized in that: The diameter of the upper through hole and the diameter of the lower through hole are both 10 cm.

7. The tensioning device for pressure-type prestressed anti-floating anchor according to claim 1, characterized in that: The support rod is a steel support rod.

8. The tensioning device for pressure-type prestressed anti-floating anchor rod according to claim 1, characterized in that: The support rod is a support plate.

9. The tensioning device for the pressure-type prestressed anti-floating anchor rod according to claim 8, characterized in that: The thickness of the support plate is 20 mm, and the height of the support plate is 200 mm.

10. The tensioning device for pressure-type prestressed anti-floating anchor rod according to claim 1, characterized in that: The number of the support rods is 4, and the 4 support rods are distributed at the 4 corners of a rectangle.

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