ECC impact-resistant pipe pile structure

Abstract

The utility model relates to an ECC anti-impact pipe pile structure, and belongs to the technical field of civil engineering design, the ECC anti-impact pipe pile structure comprises an embedded part fixed on a foundation and used for installing an ECC anti-impact pipe pile body, and the ECC anti-impact pipe pile body comprises a high-strength concrete core column, a steel pipe, a butt joint structure and a flexible connecting piece; an ECC pouring layer is arranged on the outer surface of the steel pipe, the flexible connecting piece is fixed to the outer surface of the steel pipe, and the bottom end of the steel pipe is connected with a butt joint structure. The butt joint structure comprises a flange plate and a base plate welded to the lower surface of the flange plate, an annular mounting groove communicating with the outside is formed in the base plate, and a bolt is mounted in the annular mounting groove; and a reinforcing piece is arranged outside the flexible connecting piece. According to the ECC impact-resistant pipe pile structure, the annular mounting groove is formed in the chassis, the bolts are mounted in advance, and the bolts can be kept at the correct positions in the mounting process through the design of the annular mounting groove, so that the mounting precision is improved, and the mounting process of the ECC impact-resistant pipe pile structure can be greatly simplified.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of civil engineering design, in particular to an ECC impact-resistant pipe pile structure. BACKGROUND

[0002] With the rapid development of urban construction, various expressways, urban traffic roads, bypass expressways and township roads and other traffic networks are widely distributed, and in addition, with the rapid economic development, the total amount of automobiles has greatly increased, so that road traffic safety problems are concerned by the state and the general public. Due to the limitation of topography, natural disasters and other comprehensive reasons, some road sections have poor line types and unobstructed vision, which leads to traffic accidents. How to maximize the protection of the life safety of the parties involved in the traffic accident and reduce the economic loss caused by the traffic accident is a problem that should be considered and urgently solved in the field of civil engineering.

[0003] In the implementation of the application, at least the following problems exist in the prior art. In the prior art, the ECC impact-resistant pipe pile is installed by first fixing the embedded part to the ground, and then fixing the flange plate of the ECC impact-resistant pipe pile to the embedded part. However, the mounting hole on the flange plate is a circular hole, and the flange plate and the mounting hole of the embedded part must be connected during installation. This method is not only inconvenient to operate, but also low in efficiency. Therefore, the ECC impact-resistant pipe pile structure is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the ECC impact-resistant pipe pile structure is provided, which has the advantages of practicality, easy installation and the like, and solves the problem of inconvenient installation of the mounting hole of the ECC impact-resistant pipe pile.

[0005] In summary, the application provides the following technical scheme: the ECC impact-resistant pipe pile structure comprises an embedded part fixed to the ground for installation of an ECC impact-resistant pipe pile body, the ECC impact-resistant pipe pile body comprises a high-strength concrete core column, a steel pipe, a butt joint structure and a flexible connecting piece.

[0006] The outer surface of the steel pipe is provided with an ECC pouring layer, the flexible connecting piece is fixed to the outer surface of the steel pipe, and the bottom end of the steel pipe is connected to the butt joint structure.

[0007] The butt joint structure comprises a flange plate and a bottom plate welded to the lower surface of the flange plate, the bottom plate is internally provided with an annular mounting groove in communication with the outside, and the annular mounting groove is internally provided with a bolt.

[0008] The flexible connecting piece is externally provided with a reinforcing piece.

[0009] The application provides sufficient strength for the concrete-filled steel tube pile to resist the impact of an accident vehicle, ensures that the crash barrier pile is not damaged, avoids the vehicle from breaking the crash barrier pile, causes the vehicle to fall off a cliff or crash into other lanes to cause a chain reaction, causes greater losses, and the ECC material has good energy consumption capacity, large damage tolerance and good impact resistance, can consume the huge energy generated when the vehicle collides, reduces the damage degree of the vehicle, and protects the life safety of the parties.

[0010] Further, the ECC pouring layer is formed by pouring ECC on the outer wall of the steel pipe, and the ECC pouring layer is bonded to the steel pipe.

[0011] The beneficial effects of the above further scheme are that the ECC pouring layer itself has high strength and high toughness, pouring it on the outer wall of the steel pipe can significantly improve the bearing capacity of the entire pipe pile structure, the bonding between the ECC pouring layer and the steel pipe further enhances the synergistic effect between the two, so that the overall structure can more effectively disperse and resist stress when subjected to external force, thereby improving the overall strength of the structure.

[0012] Further, the steel pipe and the flange plate are connected by welding, and a reinforcing rib is welded between the flange plate and the steel pipe to improve the connection strength of the high-strength concrete core column and the flange plate.

[0013] The beneficial effects of the above further scheme are that the steel pipe and the flange plate are connected by welding, which has high strength and stability and can withstand large tension and pressure, and the welding connection can also provide good sealing performance to prevent medium leakage

[0014] Further, the flexible connecting piece is arranged between the steel pipe and the ECC pouring layer, the flexible connecting piece has a T-shaped steel structure, the number of flexible connecting pieces is several, and the several flexible connecting pieces are arranged equidistantly on the outer surface of the steel pipe in a cross shape.

[0015] The beneficial effects of the above further scheme are that the flexible connecting piece can absorb and disperse the stress between the steel pipe and the ECC pouring layer, prevent structural damage caused by stress concentration, and under the action of external load, the flexible connecting piece can deform to a certain extent, thereby reducing the impact and damage to the surrounding structure.

[0016] Further, the flange plate is installed and fixed by a bolt and a pre-embedded part, and the pre-embedded part is provided with a mounting hole matched with the bolt fastening.

[0017] The beneficial effects of the above further scheme are that by opening a ring-shaped mounting groove in the chassis and pre-installing a bolt, the installation process of the ECC impact-resistant pipe pile structure can be greatly simplified.

[0018] Further, the reinforcing member comprises a sleeve and two telescopic rods, and a positioning hole is formed in each end of the two telescopic rods and fixedly connected with the adjacent flexible connecting piece.

[0019] The beneficial effect of the further scheme is that the connection strength between the steel pipe and the ECC pouring layer in the ECC impact-resistant pipe pile structure is further strengthened by fixing one end of the telescopic rod to the flexible connecting piece, and the accurate connection between the telescopic rod and the flexible connecting piece is ensured by the design of the positioning hole, thereby preventing structural damage caused by insecure connection.

[0020] Further, the two telescopic rods extend to the inside of the sleeve at the opposite end, and an adjusting hole is formed in the telescopic rod and the inside of the sleeve.

[0021] The beneficial effect of the further scheme is that the telescopic rod can be adjusted in extension relative to the sleeve, which makes the reinforcing member adapt to different installation requirements and working conditions, and the different parts of the ECC impact-resistant pipe pile structure can be reinforced and supported by adjusting the extension length of the telescopic rod.

[0022] Compared with the prior art, the ECC impact-resistant pipe pile structure provided by the present application has the following beneficial effects:

[0023] 1. The ECC impact-resistant pipe pile structure, the steel pipe concrete pile provides sufficient strength to resist the impact of accident vehicles, ensures that the crash barrier pile is not damaged, avoids the vehicle from breaking the crash barrier pile, causes the vehicle to fall off the cliff or crash into other lanes to cause a chain reaction, causes greater losses, at the same time, the ECC material has good energy consumption capacity, large damage tolerance, good impact resistance, can consume the huge energy generated when the vehicle collides, reduces the damage degree of the vehicle, and protects the life safety of the parties.

[0024] 2. The ECC impact-resistant pipe pile structure, the reinforcing member provides additional support and stability for the ECC impact-resistant pipe pile body through the design of the sleeve and the telescopic rod, which helps to resist external impact and vibration, ensures the long-term stability and safety of the pipe pile structure. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural cross-sectional view of the present application;

[0026] Figure 2 is a structural perspective view of the ECC impact-resistant pipe pile body of the present application;

[0027] Figure 3 is a structural cross-sectional view of the ECC pouring layer of the present application;

[0028] Figure 4 is a structural schematic view of the reinforcing member of the present application.

[0029] Reference Signs List:

[0030] 1, foundation; 2, embedded part; 3, ECC impact-resistant pipe pile body; 301, high-strength concrete core column; 302, steel pipe; 303, flange plate; 304, bottom plate; 305, annular mounting groove; 306, flexible connecting piece; 307, reinforcing rib; 308, ECC pouring layer; 309, bolt; 4, reinforcing piece; 401, sleeve; 402, telescopic rod; 403, positioning hole. DETAILED DESCRIPTION

[0031] Please refer to Figures 1-4 , the ECC impact-resistant pipe pile structure, including the embedded part 2 fixed on the foundation 1 for the installation of the ECC impact-resistant pipe pile body 3, the ECC impact-resistant pipe pile body 3 includes high-strength concrete core column 301, steel pipe 302, butt joint structure and flexible connecting piece 306; wherein, the butt joint structure includes flange plate 303 and bottom plate 304 welded to the lower surface of the flange plate 303, the steel pipe 302 and the flange plate 304 are connected by welding, this connection method has high strength and stability, can withstand large tension and pressure, the welding connection can also provide good sealing performance, prevent medium leakage. The bottom plate 304 is internally provided with an annular mounting groove 305 in communication with the outside, and the annular mounting groove 305 is provided with a bolt 309. The flange plate 303 is installed and fixed with the embedded part 2 through the bolt 309, and the embedded part 2 is provided with an installation hole matched with the bolt 309. By internally providing the annular mounting groove 305 in the bottom plate 304 and pre-installing the bolt, the installation process of the ECC impact-resistant pipe pile structure 3 can be greatly simplified. The outer surface of the steel pipe 302 is provided with an ECC pouring layer 308, and the flexible connecting piece 306 is fixed to the outer surface of the steel pipe 302, and the bottom end of the steel pipe 302 is connected with the butt joint structure.

[0032] Specifically, the ECC pouring layer 308 is poured on the ECC formed on the outer wall of the steel pipe 302, and the ECC pouring layer 308 is bonded with the steel pipe 302. The flexible connecting piece 306 can absorb and disperse the stress between the steel pipe 302 and the ECC pouring layer 308, prevent structural damage caused by stress concentration, and under the action of external load, the flexible connecting piece 306 can deform to a certain extent, thereby reducing the impact and damage to the surrounding structure. The steel pipe 302 and the flange plate 303 are connected by welding, in order to improve the connection strength of the high-strength concrete core column 301 and the flange plate 303, the flange plate 303 and the steel pipe 302 are welded with a reinforcing rib 307.

[0033] In the embodiment, the flexible connecting pieces 306 are arranged between the steel pipes 302 and the ECC pouring layers 308. The flexible connecting pieces 306 are T-shaped steel structures, and a plurality of the flexible connecting pieces 306 are arranged equidistantly on the outer surfaces of the steel pipes 302 in a cross shape. The ECC pouring layers 308 have high strength and high toughness, and pouring the ECC pouring layers 308 on the outer walls of the steel pipes can significantly improve the bearing capacity of the whole pipe pile structure. The bonding between the ECC pouring layers 308 and the steel pipes 302 further enhances the synergy between them, so that the overall structure can more effectively disperse and resist stress when subjected to external force, thereby improving the overall strength of the structure.

[0034] It should be noted that the ECC material has good self-control crack width, freeze-thaw resistance, corrosion resistance, wear resistance, cold and hot cycle resistance, and fatigue resistance, which can effectively protect the steel pipe from corrosion, prolong the service life of the built-in steel pipe, and reduce maintenance costs. When the ECC has multiple cracks, the average crack width is not greater than 0.1 mm, and the crack with this width has a self-healing effect. That is, under the action of external force, if the impact pile disappears in the plastic deformation stage, the impact pile has a self-repairing effect at this time, which can reduce the maintenance frequency of the impact pile and increase the service life. The ECC pouring layer 308 and the steel pipe 2 have good deformation coordination ability, and after impact, the ECC and the steel pipe concrete can coordinate deformation, the bearing capacity decreases less, and the ECC and the steel pipe do not separate, which reduces the maintenance cost in the later period. The flexible connecting piece 306 is welded by a flange steel plate and a relatively thin LY100 low yield point steel web.

[0035] The ECC impact-resistant pipe pile body 3 in this embodiment is first welded with the flexible connecting piece 306 on the steel pipe 302 in a steel structure processing factory during installation, wherein one end of the low yield point steel web 9 is welded with the outer wall of the steel pipe 302, and the other end is welded with the flange steel plate, the core high-strength concrete is poured in the steel pipe 302 to form a concrete-filled steel tube column (i.e. high-strength concrete core column 301), and then the ECC is poured outside the high-strength concrete core column 301, and after 24 hours, the mold is removed, and the pouring water is maintained for 28 days in the indoor natural environment. According to the height of the ordinary vehicle chassis, the ECC is not poured in the range of 15 cm-25 cm from the top of the flange plate 4 to ensure that the anti-collision pile can be reliably connected and play a role under the premise of reducing the cost and saving the cost. After the ECC to be poured forms the ECC pouring layer 3 with the cylindrical shape integrated with the steel pipe 2, the ECC impact-resistant pipe pile body 3 can be transported to the road site for installation of the anti-collision pile. The lower flange plate 304 of the ECC impact-resistant pipe pile body 3 and the embedded part 2 are connected by bolts 409, and the number of bolts 309 used for connection between the flange plate 304 and the embedded part 2 can be determined according to calculation. The embedded part 2 is reliably connected with the foundation in advance by means of nails. The top surface of the embedded part 2 should be slightly lower than the road surface and filled with high-strength waterproof concrete to prevent the embedded part 2 from being reduced in corrosion strength, and attention should be paid to not block the bolt holes on the embedded part 2 during filling. In addition, other metal materials exposed to the outside should be subjected to rust prevention treatment.

[0036] In this embodiment, the flexible connecting piece 306 is provided with a reinforcing part 4. The reinforcing part 4 includes a sleeve 401 and two telescopic rods 402, and the telescopic rods 402 can be adjusted in extension and contraction relative to the sleeve 401, which enables the reinforcing part 4 to adapt to different installation requirements and working conditions, and through adjustment of the extension length of the telescopic rods 402, different parts of the ECC impact-resistant pipe pile structure can be reinforced and supported. The two telescopic rods 402 are each provided with a positioning hole 403 at one end away from each other, which is fixedly connected with the adjacent two flexible connecting pieces 306. The opposite ends of the two telescopic rods 402 extend into the inside of the sleeve 401, and the inside of the telescopic rod 402 and the sleeve 401 are each provided with an adjusting hole. By connecting one end of the telescopic rod 402 with the flexible connecting piece 306, the connection strength between the steel pipe 302 and the ECC pouring layer 308 in the ECC impact-resistant pipe pile structure can be further strengthened, and the design of the positioning hole 403 ensures the accurate connection between the telescopic rod 402 and the flexible connecting piece 306, preventing structural damage caused by insecure connection.

[0037] In use, the design of the sleeve 401 and the two telescopic rods 402 in the reinforcing part 4 as well as the positioning hole 403 and the adjusting hole brings many benefits such as improvement of structural strength and stability, facilitation of adjustment and adaptation to different working conditions, optimization of construction and maintenance, etc. This design enables the ECC impact-resistant pipe pile structure to have a wider application prospect and value in the field of civil engineering.

[0038] The working principle of the above embodiment is as follows:

[0039] The ECC pouring layer 308 is connected with the inner high-strength concrete core column 301 through the flexible connecting piece 306 and the adhesion of the ECC pouring layer 308 and the steel pipe 302, and in the formed ECC impact-resistant pipe pile body 1, the flexible connecting piece 306 can enhance the adhesion performance of the ECC pouring layer 308 and the steel pipe 302, and the low-yield-point steel sheet can deform to consume energy when impact occurs, so as to reduce vehicle damage. The ECC pouring layer 308 and the steel pipe 302 have good deformation coordination capability, and after impact, the ECC pouring layer 308 and the steel pipe 302 can coordinate deformation, the bearing capacity decreases less, the ECC pouring layer 308 and the steel pipe 302 will not separate, and the maintenance cost in the later period is reduced.

Claims

1. An ECC impact pipe pile structure, comprising a pre-embedded part (2) fixed on a foundation (1) for installation of an ECC impact pipe pile body (3), characterized in that: The ECC impact-resistant pipe pile body (3) comprises a high-strength concrete core column (301), a steel pipe (302), a butt joint structure and a flexible connecting piece (306); An ECC pouring layer (308) is arranged on the outer surface of the steel pipe (302), the flexible connecting piece (306) is fixed to the outer surface of the steel pipe (302), and the bottom end of the steel pipe (302) is connected with the butt joint structure; The butt joint structure comprises a flange plate (303) and a bottom plate (304) welded to the lower surface of the flange plate (303), an annular mounting groove (305) in communication with the outside is formed in the inside of the bottom plate (304), and a bolt (309) is mounted in the annular mounting groove (305); The flexible connecting piece (306) is provided with a reinforcing piece (4) outside.

2. The ECC impact-tube pile structure of claim 1, wherein: The ECC pouring layer (308) is poured on the ECC formed on the outer wall of the steel pipe (302), and the ECC pouring layer (308) is bonded to the steel pipe (302).

3. The ECC impact-tube pile structure according to claim 1, wherein: The steel pipe (302) is connected with the flange plate (303) through welding, in order to improve the connection strength of the high-strength concrete core column (301) and the flange plate (303), a reinforcing rib (307) is welded between the flange plate (303) and the steel pipe (302).

4. The ECC impact-tube pile structure of claim 1, wherein: The flexible connecting piece (306) is arranged between the steel pipe (302) and the ECC pouring layer (308), the flexible connecting piece (306) is in the shape of a T-shaped steel structure, the number of the flexible connecting piece (306) is several, and the several flexible connecting pieces (306) are arranged equidistantly in a cross shape on the outer surface of the steel pipe (302).

5. The ECC impact-tube pile structure of claim 1, wherein: The flange plate (303) is mounted and fixed with the embedded part (2) through the bolt (309), and the embedded part (2) is provided with a mounting hole matched with the bolt (309) for fastening.

6. The ECC impact-tube pile structure of claim 4, wherein: The reinforcing piece (4) comprises a sleeve (401) and two telescopic rods (402), and the two telescopic rods (402) are both provided with a positioning hole (403) at one end away from each other.

7. The ECC impact-tube pile structure of claim 6, wherein: The opposite ends of the two telescopic rods (402) extend into the inside of the sleeve (401), and the telescopic rods (402) and the sleeve (401) are both provided with adjusting holes in the inside.

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