A reinforcement tool for improving the friction resistance of a single pile hoop

Abstract

The utility model discloses a reinforcement tool for improving the friction resistance of a single pile clamp, comprising a first clamp, a second clamp, and at least two third bolts; both ends of the first clamp and the second clamp protrude from the upper and lower edges of the clamp; the first clamp is placed on an outer side of the first connection end of the clamp, and the second clamp is placed on the other outer side of the first connection end of the clamp, and both ends of the first clamp and the second clamp are connected by at least two third bolts. After the clamp, bracket, and assembly are installed, the utility model uses a pair of clamps to tighten the end gap of the connection part of A and B clamps by pressing the clamps at both ends, thereby increasing the pressure between the clamp and the concrete, thereby increasing the friction resistance between the clamp and the concrete pile, and after a strong wind, the clamp does not have any slippage phenomenon, thereby increasing stability and improving wind damage resistance; the utility model has low investment, overall beauty, and has achieved good economic results.

Description

Technical Field

[0001] The utility model relates to the technical field of clamp reinforcement, in particular to a reinforcement tool used for improving the friction resistance of a single pile clamp. Background Art

[0002] Some photovoltaic fields use single pile structure, and the foundation uses 300mm diameter concrete piles. Due to different geological conditions, the depth of the pile foundation varies from 2000 to 2500mm, and the exposed depth is not less than 1000mm. The length of the steel cage in the concrete pile varies from 2850 to 3350mm, and the pile spacing is 3750mm. Five piles form a group. Figure 1 As shown, the columns are made of C150*70*20*3.5Q355B steel, with 1.0 meter exposed outside and the top of the column about 2.0 meter above the ground. The beams and columns are connected by M16*40 (strength grade 8.8 and equipped with two flat and one elastic) bolts. The beams and concrete piles are connected by front and rear diagonal braces and fixed to the concrete piles by hoops. The hoops are composed of two semicircles A and B, which are bolted together to form a circular hoop and fixed to the concrete piles. The stress condition of a single pile is that the front and rear two triangular frames form a unified stress-bearing whole, and then five single piles are connected into a whole by four purlins to form a component installation reference surface.

[0003] The construction scheme of directly pre-burying a single column in a concrete column is inconvenient to adjust, but the support structure is simple and the force is clear. Compared with the method of using a cast-in-place pile (pile diameter φ300mm) exposed 300mm above the ground and then using a steel pipe column, the steel consumption is reduced by 25% and the concrete consumption is increased by 31%. Considering the influence of a series of other factors, the construction cost is reduced by 8% year-on-year. After comparative calculation, the material and construction costs of a photovoltaic field with a 100MW component capacity of 575Wp are saved by about 800,000 yuan; compared with the use of double piles with a cast-in-place pile φ200 exposed 100mm above the ground, the steel consumption is increased by 13% and the concrete consumption is reduced by 42% year-on-year, but the drilling, installation and transportation costs of the double piles are increased, so the comprehensive cost is reduced by 10% year-on-year compared with the single pile. After comparative calculation, the material and construction costs of a photovoltaic field with a 100MW component capacity of 575Wp are saved by about 1 million yuan. Through the above technical and economic comparison, the single pile construction scheme has the lowest cost and lower technical requirements than other schemes, so this scheme is worth promoting.

[0004] As photovoltaic projects are often affected by monsoon climate, the wind-exposed surface of a single string is large, and the stability, strength and rigidity of the bracket must be considered. As the project progresses, the disadvantages of the single-pile solution promoted above have become increasingly apparent. The single-pile bracket is not as stable as the double-pile bracket, and the losses are serious when encountering strong winds. Some brackets are broken at the connection between the column and the beam bolts. The main reason is that the friction resistance of the clamp holding the pile is insufficient, causing the clamp to slide up and down, changing the stress state of the entire bracket, thereby destroying the stability of the bracket structure. In mild cases, the bracket is seriously deformed, and in severe cases, the beams and purlins are broken and the components are damaged, causing huge losses to the project, but also bringing great safety hazards. Especially in the operation period, the safety risk problem is more prominent.

[0005] In the prior art, the reason why the friction resistance of the clamp pile is insufficient is that after the bolts connecting the A and B clamps are tightened, the gap between the clamp and the concrete column cannot be eliminated. (Even if double bolts are used and the screw holes are as close to the column as possible, there is still a gap in the process of tightening the bolts because they are hexagonal bolts. At the same time, the tail of the clamp is also cold-bent into an arc and then tightened by the bolts. Due to the existence of the above two situations, the gap in the arc section of the tail of the clamp cannot be completely eliminated.) During operation, the clamp exerts insufficient pressure on the concrete pile and the friction force is small. The positioning effect of the clamp is small. After being affected by wind, the gap between the end faces of the clamp is directly released to the circumferential surface of the clamp, and the local gap between the local end faces of the clamp and the concrete column develops into a full-circle gap, so that it can slide up and down freely without the action of external force, and loses its due positioning effect. As time goes by, the bolts originally connecting the A and B clamps gradually loosen, and eventually lose their original tightening force, so that the originally designed triangular stable bracket is transformed into a single bracket, and the stability is sharply reduced, so that the stability of the entire bracket group cannot meet the requirements.

[0006] In order to solve the above technical problems, we have designed a reinforcement tool for improving the friction resistance of the single pile hoop. Utility Model Content

[0007] The purpose of the utility model is to design a reinforcement tool for improving the friction resistance of a single pile hoop in order to solve the above problem.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0009] A reinforcement tool for improving the friction resistance of a single pile hoop, comprising:

[0010] a first clamping plate; at least one first through hole is disposed at both ends of the first clamping plate; at least one first nut is installed at both ends of the first surface of the first clamping plate, and the first nut is disposed coaxially with the first through hole,

[0011] A second clamping plate; at least one second through hole is provided at both ends of the second clamping plate; both ends of the first clamping plate and the second clamping plate protrude from the upper and lower edges of the clamping hoop, and the first through hole and the second through hole are also provided at positions protruding from the upper and lower edges of the clamping hoop;

[0012] At least two third bolts; the first clamping plate is placed on one outer side of the first connecting end of the clamp, the second clamping plate is placed on the other outer side of the first connecting end of the clamp, and the first clamping plate and the second clamping plate are connected at both ends by at least two third bolts.

[0013] Specifically, the first connecting end and the second connecting end of the clamp are both connected by a second bolt, and the first clamping plate and the second clamping plate are arranged between the second bolt and the circular arc segment of the clamp.

[0014] Specifically, a first inward groove is provided on the first side of the first clamping plate, a second inward groove is provided on the first side of the second clamping plate, and both ends of the second bolt are located in the first groove and the second groove respectively.

[0015] Preferably, a first outward-facing protrusion is provided on the second side of the first clamping plate, and a second inward-facing protrusion is provided on the second side of the second clamping plate, and outer sides of the first protrusion and the second protrusion are both provided close to the arc segment of the hoop.

[0016] Preferably, the reinforcement tool also includes four connecting round steels, the clamp includes an A clamp and a B clamp, and the two ends of the four connecting round steels are respectively welded to the A clamp and the B clamp at the upper and lower parts of the two connecting ends of the clamp.

[0017] Furthermore, the welding length connecting the round steel and the A clamp or the B clamp is not less than 50 mm.

[0018] The beneficial effects of the utility model are:

[0019] After the clamp, bracket and components are installed, the utility model adopts a pair of clamps to tighten the end gap of the connection part of A and B clamps by pressing the clamps at both ends, thereby increasing the pressure between the clamp and the concrete, thereby increasing the friction resistance between the clamp and the concrete pile. After strong winds, there is no slippage of the clamp, which increases stability and improves wind damage resistance. The utility model has low investment, overall beauty and achieves good economic results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the structure of the bracket;

[0021] Figure 2 This is a schematic diagram of the installation structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the connection structure of the first clamping plate and the second clamping plate in the utility model;

[0023] Figure 4 It is a structural schematic diagram of the first splint in the utility model;

[0024] Figure 5 for Figure 4 1-1 sectional view in;

[0025] Figure 6 It is a structural schematic diagram of the second splint in the utility model;

[0026] Figure 7 for Figure 6 Sectional view 2-2 in FIG.

[0027] Figure 8 A schematic diagram of the installation structure of the first clamping plate and the second clamping plate in the utility model.

[0028] In the figure: 1. concrete column; 2. single column; 3. crossbeam; 4. diagonal brace; 5. hoop; 51. first bolt; 52. second bolt; 6. first clamp; 61. first nut; 62. first through hole; 63. first groove; 64. first protrusion; 7. second clamp; 71. second through hole; 72. second groove; 73. second protrusion; 8. third bolt; 9. connecting round steel. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use, or are directions or positional relationships that are usually understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component 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 utility model.

[0033] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings.

[0036] like Figure 1-8 As shown, a reinforcement tool for improving the friction resistance of a single pile hoop comprises:

[0037] The first clamping plate 6; both ends of the first clamping plate 6 are provided with a first through hole 62; both ends of the first surface of the first clamping plate 6 are provided with a first nut 61, and the first nut 61 is provided coaxially with the first through hole 62,

[0038] The second clamping plate 7; both ends of the second clamping plate 7 are provided with a second through hole 71; both ends of the first clamping plate 6 and the second clamping plate 7 protrude from the upper and lower edges of the clamp 5, and the first through hole 62 and the second through hole 71 are also provided at positions protruding from the upper and lower edges of the clamp 5;

[0039] Two third bolts 8; the first clamping plate 6 is placed on one outer side of the first connecting end of the clamping hoop 5, and the second clamping plate 7 is placed on the other outer side of the first connecting end of the clamping hoop 5. The first clamping plate 6 and the second clamping plate 7 are connected at both ends by two third bolts 8 (the head of the third bolt 8 is placed on the outer side of the second clamping plate 7, and the rod of the third bolt 8 passes through the first through hole 62 on the second clamping plate 7 and the second through hole 71 on the first clamping plate 6 in sequence, and then screwed into the first nut 61, and then screwed out of the nut and screwed into the second nut of the third bolt 8). In some embodiments, the use of the second nut in the third bolt 8 can be eliminated, and the purpose can also be achieved.

[0040] like Figure 1 and 2 As shown in FIG. 8 , the first connection end and the second connection end of the hoop 5 are connected by a second bolt 52, and the first clamping plate 6 and the second clamping plate 7 are arranged between the second bolt 52 and the arc section of the hoop 5. The hoop 5 is connected to the diagonal brace 4 by a first bolt 51. The hoop 5 is tightly clamped on the outer wall of the concrete column 1, the other end of the diagonal brace 4 is connected to the cross beam 3, and the single column 2 is connected to the middle of the cross beam 3.

[0041] like Figure 2 and 4 As shown in FIG. 7 , a first inward groove 63 is provided on the first side of the first clamping plate 6, and a second inward groove 72 is provided on the first side of the second clamping plate 7. Both ends of the second bolt 52 are located in the first groove 63 and the second groove 72 respectively.

[0042] like Figure 2 and 4 As shown in FIG. 7 , a first outward protrusion 64 is provided on the second side of the first clamping plate 6 , and a second inward protrusion 73 is provided on the second side of the second clamping plate 7 . The outer sides of the first protrusion 64 and the second protrusion 73 are both provided close to the arc section of the clamp 5 .

[0043] like Figure 2 and 8 As shown, the reinforcement tool also includes four connecting round steels 9, and the hoop 5 includes an A hoop and a B hoop. The two ends of the four connecting round steels 9 are respectively welded to the A hoop and the B hoop at the upper and lower parts of the two connecting ends of the hoop 5. The welding length of the connecting round steel 9 and the A hoop or the B hoop is not less than 50 mm.

[0044] In some embodiments, the material of the clamp 5 is Q235B. Considering the reduction of deformation of the splint during the extrusion process, the first splint 6 and the second splint 7 are made of Q355B high-strength steel plate (thickness 16 mm), and the upper and lower ends of the clamp 5 are cut, and the upper and lower ends are chamfered. The two splints are connected by a third bolt 8 of M12*60 (strength grade 10.8).

[0045] During the specific implementation, the original hoop 5 is first tightened symmetrically on the left and right sides through the second bolt 52, and then a clamping plate and a second clamping plate 7 are put on both sides, and then the third bolt 8 is used for initial tightening. The initial tightening should be performed symmetrically on the left, right, top and bottom. Then, the hoop 5 is knocked around with a hammer to release uneven stress, especially the part with a large gap. The two third bolts 8 are tightened symmetrically on the left, right, top and bottom again. At this time, the contact tightness between the hoop 5 and the concrete column 1 can be checked, and the contact tightness can also be checked by hammering upward and downward. If there is displacement, the final tightening can be performed again in the above manner, thereby increasing the pressure between the hoop 5 and the concrete column 1, thereby increasing the frictional resistance between the hoop 5 and the concrete column 1. Refer to the recommended values ​​in the component installation manual, M12 bolt torque: 76-102N.m, hoop 5 locking force: 45-50N.m, after reinforcement, the locking force of the hoop 5 is increased by 1.87 times compared with the designed hoop 5.

[0046] If each clamp 5 is tightened by a pressure plate to improve the locking force of the clamp 5, the required pressure plate is large and not economical. At the same time, the bolts may become loose over time. This is a short-term reinforcement measure. Therefore, it is necessary to use connecting round steel 9 for constraint on the basis of compression. Hot-rolled round steel with the same diameter as the thickness of the clamp 5 is used to weld the left, right, top and bottom surfaces of the ends of the A and B clamps. After the weld is cooled, the pressure plate is removed, and the parts blocked by the pressure plate are welded. Then, the pressure of the pressure plate is transmitted to the force of the connecting part, and the effect is equivalent to the compression of the pressure plate. Using connecting round steel 9 instead of the pressure block not only saves costs, but also the pressure plate can be reused; and it can also be used like Figure 8 As shown, the clamping plate and the connecting round steel 9 are used together to increase the structural stability.

[0047] After the weld of the connected round steel 9 is completely cooled, the welding slag is removed from the weld, and the metal luster is exposed, and then anti-corrosion paint is applied, and the original clamp 5 connecting bolts (second bolts 52) are tightened again. The clamp 5 after the welding of the connected round steel 9 is a unified whole, eliminating the phenomenon that the original clamp 5 connecting bolts are loosened due to the dynamic load, and at the same time, the strength of the connection between the clamp 5 and the inclined beam is strengthened as a whole. At this point, the reinforcement of the clamp 5 of the single pile support is completed.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A reinforcement tool for improving the friction resistance of a single pile hoop, characterized in that: include: First splint; At least one first through hole is disposed at both ends of the first clamping plate; at least one first nut is installed at both ends of the first surface of the first clamping plate, and the first nut is disposed coaxially with the first through hole; A second clamping plate; at least one second through hole is provided at both ends of the second clamping plate; both ends of the first clamping plate and the second clamping plate protrude from the upper and lower edges of the clamping hoop, and the first through hole and the second through hole are also provided at positions protruding from the upper and lower edges of the clamping hoop; At least two third bolts; the first clamping plate is placed on one outer side of the first connecting end of the clamp, the second clamping plate is placed on the other outer side of the first connecting end of the clamp, and the first clamping plate and the second clamping plate are connected at both ends by at least two third bolts.

2. A reinforcement tool for improving the friction resistance of a single pile hoop according to claim 1, characterized in that: The first connecting end and the second connecting end of the hoop are both connected by a second bolt, and the first clamping plate and the second clamping plate are arranged between the second bolt and the circular arc segment of the hoop.

3. A reinforcement tool for improving the friction resistance of a single pile hoop according to claim 2, characterized in that: A first inward groove is arranged on the first side of the first clamping plate, a second inward groove is arranged on the first side of the second clamping plate, and both ends of the second bolt are respectively located in the first groove and the second groove.

4. A reinforcement tool for improving the friction resistance of a single pile hoop according to claim 2, characterized in that: An outward first protrusion is arranged on the second side of the first clamping plate, and an inward second protrusion is arranged on the second side of the second clamping plate. The outer sides of the first protrusion and the second protrusion are both arranged close to the arc section of the hoop.

5. A reinforcement tool for improving the friction resistance of a single pile hoop according to claim 1, characterized in that: The reinforcement tools also include four connecting round steels, and the clamps include A clamps and B clamps. The two ends of the four connecting round steels are respectively welded to the A clamps and B clamps at the upper and lower parts of the two connecting ends of the clamps.

6. A reinforcement tool for improving the friction resistance of a single pile hoop according to claim 5, characterized in that: The welding length connecting the round steel and the A clamp or B clamp shall not be less than 50mm.

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