Prestressed pipe pile splicing pile

Abstract

The utility model discloses a prestressed pipe pile splicing pile which comprises a pipe pile body and a retaining wall, a bearing platform is arranged on the retaining wall, the pipe pile body and the retaining wall are connected through a steel reinforcement framework, a supporting plate is arranged in the pile top of the pipe pile body, the steel reinforcement framework is arranged above the supporting plate, and the bearing platform is arranged on the supporting plate. The steel reinforcement framework comprises first steel reinforcements, second steel reinforcements and third steel reinforcements, the first steel reinforcements and the third steel reinforcements are vertical steel reinforcements, and the second steel reinforcements are transverse anchoring steel reinforcements; the first steel bars and the second steel bars are evenly arranged along the circumference of the pipe pile, and the three third steel bars are evenly arranged along the circumference of the pipe pile, bent by 90 degrees at the top of the pipe pile and firmly hung on the pipe pile. According to the prestressed pipe pile splicing pile, the drawing resistance of the connecting assembly and the connecting strength between the pipe piles can be improved, and the service life of the pipe piles can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe pile connecting piece, especially to a prestressed pipe pile. BACKGROUND

[0002] The prestressed concrete pipe pile is short for prestressed pipe pile, and is a kind of engineering construction material of hollow cylinder slender concrete prefabricated component, mainly applied to large construction projects such as railway bridge.

[0003] During use, pipe piles need to be selected in different lengths according to different use requirements, so multiple pipe piles need to be connected to form a pile body with longer length by pile connecting mode.Common prestressed pipe pile connecting modes include welding, mechanical connection and concrete pouring connection etc.For the connection of single pipe pile, concrete pouring connection mode is usually adopted: two sections of prestressed pipe piles are fixed on a certain distance by suitable connecting pieces (such as sleeve, tray etc.), after prestressed load is applied on prefabricated load seat, prestressed steel beam is passed through two sections of pipe piles to form a post-tensioned prestressed system.The connecting strength and service life of the pile connecting mode need to be further improved. SUMMARY

[0004] The utility model provides a prestressed pipe pile, which can improve the pull-out resistance of the connecting assembly and the connecting strength between the pipe piles, and ensure the service life of the pipe piles.

[0005] The utility model discloses a prestressed pipe pile, which comprises a pipe pile body and a wall protection, a bearing platform is arranged on the wall protection, the pipe pile body and the wall protection are connected through a steel framework, a supporting plate is arranged in the top of the pipe pile body, the steel framework is arranged above the supporting plate, the steel framework comprises first steel bars, second steel bars and third steel bars, the first steel bars and the third steel bars are vertical steel bars, and the second steel bars are horizontal anchoring steel bars, the first steel bars and the second steel bars are uniformly arranged along the circumference of the pipe pile, and the third steel bars are uniformly arranged in three roots along the circumference of the pipe pile and are bent by 90 degrees at the top of the pile to be hung on the pipe pile.

[0006] Further, the steel framework further comprises fourth steel bars and fifth steel bars, the fourth steel bars are vertical steel bars, the fifth steel bars are horizontal anchoring steel bars, the fourth steel bars and the fifth steel bars are uniformly arranged along the inner circumference of the wall protection, and the fourth steel bars extend into the bearing platform.

[0007] Further, the top elevation of the pipe pile body is lower than the design elevation of the bearing platform, and the elevations of the pipe pile body and the bearing platform are less than two times of the pile diameter.

[0008] Further, the supporting plate is a circular thin steel plate with a thickness of 4-5 mm, and the diameter of the circular thin steel plate is less than the inner diameter of the pipe pile.

[0009] Further, a cushion layer is arranged between the outer wall of the retaining wall and the bearing platform, and a cushion layer is arranged between the inner wall of the retaining wall and the outer wall of the pipe pile body.

[0010] Further, pile connecting concrete is poured between the bottom of the inner wall of the pipe pile body and the supporting plate.

[0011] Further, the grade of the pile connecting concrete is equal to or one grade higher than that of the bearing platform concrete.

[0012] The prestressed pipe pile connecting structure of the utility model has the following beneficial effects compared with the prior art: the prestressed pipe pile connecting structure can improve the pull-out resistance of the connecting assembly and the connecting strength between the pipe piles, and can ensure the service life of the pipe piles. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a prestressed pipe pile connecting structure schematic view of the utility model;

[0014] Figure 2 is a prestressed pipe pile connecting structure schematic view of the utility model; Figure 1 is a sectional view along line A-A in the figure;

[0015] Figure 3 is a sectional view along line B-B in the figure. Figure 1

[0016] in the figure is marked as:

[0017] 1, pipe pile body; 2, retaining wall; 3, steel reinforcement cage; 4, supporting plate; 5, cushion layer; 6, bearing platform; 7, pile connecting concrete; 31, first steel reinforcement; 32, second steel reinforcement; 33, third steel reinforcement; 34, fourth steel reinforcement; 35, fifth steel reinforcement. DETAILED DESCRIPTION

[0018] The utility model will be further described below in combination with the drawings and embodiments.

[0019] Figure 1 is a prestressed pipe pile connecting structure schematic view of the utility model; Figure 2 is a prestressed pipe pile connecting structure schematic view of the utility model; Figure 1 is a sectional view along line A-A in the figure; Figure 3 is a sectional view along line B-B in the figure. Figure 1 Please see

[0020] , Figure 1 , Figure 2 and Figure 3 , the prestressed pipe pile connecting structure provided by the utility model comprises a pipe pile body 1 and a retaining wall 2, and is suitable for the case that the pile top elevation is lower than the design elevation of the bearing platform 6 and the elevation difference between the two is less than two times the pile diameter. A steel reinforcement cage 3 and a supporting plate 4 are arranged in the prestressed pipe pile top. The retaining wall 2 is provided with a steel reinforcement cage 3 and a cushion layer 5.​

[0021] The prestressed pipe pile provided by the utility model is provided with a support plate 4 in the pile top of a pipe pile body 1, the support plate 4 is preferably made of a 4-5mm thick round thin steel plate, a steel reinforcement cage 3 is placed above the support plate 4, the steel reinforcement cage 3 comprises a second steel bar 32 for horizontal anchoring and a first steel bar 31 and a third steel bar 33 arranged vertically, the first steel bar 31 and the second steel bar 32 are uniformly arranged along the circumference of the pipe pile, the third steel bar 33 is uniformly arranged along the circumference of the pipe pile, and three of the third steel bars are bent by 90 degrees at the pile top and are hung on the pipe pile, the first steel bar 31, the second steel bar 32 and the third steel bar 33 are all welded firmly to the support plate 4; the size of the support plate 4 is slightly smaller than the inner diameter of the pipe pile.

[0022] The steel reinforcement cage in the wall protection is composed of a fifth steel bar 35 for horizontal anchoring and a fourth steel bar 34 arranged vertically, the cushion layer 5 is connected to the outer wall of the prestressed pipe pile, and the fourth steel bar 34 and the fifth steel bar 35 are uniformly arranged along the circumference of the pipe pile.

[0023] After the support plate and the steel reinforcement cage in the pile top of the prestressed pipe pile are placed, the pile top filling core concrete is poured, when the pipe pile is a bearing pile, the pouring height of the filling core concrete is not less than 3d and not less than 1.5m. Before the filling core concrete is poured, the inner wall of the pipe pile should be cleaned, and the inner wall is preferably coated with cement slurry, a concrete interface agent or micro-expansion concrete, so as to improve the integrity of the filling core concrete and the pipe pile body concrete. After the pile top filling core concrete is poured, the pile connecting concrete 7 is poured, and the pile connecting concrete is of the same grade or one higher grade than the pile cap concrete.

[0024] Although the utility model has been disclosed as above with preferred embodiments, it is not used to limit the utility model, and anyone skilled in the art can make some modifications and improvements without departing from the spirit and scope of the utility model, so the protection scope of the utility model is defined by the claims.

Claims

1. 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