Multifunctional small steel pipe pile

Abstract

The utility model discloses a multifunctional small steel pipe pile which comprises a bearing platform, a boss and a steel pipe, the upper portion of the boss is fixedly connected with the bearing platform, the lower portion of the boss is fixedly connected with the steel pipe, a steel bar is arranged in the bearing platform, the bottom of the steel bar is connected with the boss, a pile steel pipe is installed in the steel pipe, and the upper end of the pile steel pipe is located in the bearing platform. The pile steel pipe is sleeved with a first connecting sleeve and a second connecting sleeve, the first connecting sleeve and the second connecting sleeve are arranged up and down, the reinforcing steel bars are welded to the periphery of the pile steel pipe, and a grouting pipe is arranged in the pile steel pipe and is parallel to the pile steel pipe. The multifunctional small-sized steel pipe pile provided by the utility model is well combined with a soil body, is high in bearing capacity, is suitable for various stress conditions, and can be used for bearing pressure. And pulling resistance can also be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of civil engineering and construction, and specifically relates to a multifunctional small-sized steel pipe pile. Background Art

[0002] In existing civil engineering projects, steel pipe piles are overlapped to form an arc or circle. They can play the role of surrounding water, soil, sand, etc. Steel pipe piles have high strength, can withstand large impact forces, are easy to penetrate hard soil layers, have high bearing capacity, and can withstand large horizontal forces. The pile length can be adjusted arbitrarily, and it is light in weight, has good rigidity, is easy to load and unload, and has the advantages of less soil extrusion.

[0003] The common production method of existing steel pipe piles is to use seamless steel pipes, or they can be welded by rolling steel plates. According to the different rolling production processes, steel pipe piles can be divided into straight seam steel pipe piles and spiral seam steel pipe piles. The diameter of the steel pipe pile is 400-1000mm, and the wall thickness is 6-50mm. It is generally composed of an upper section pile, several middle section piles and a lower section pile. The length of the section is generally 12-15m. There are two types of steel pipe pile ends: open and closed. For the open pile end, in order to enable the pile to penetrate the hard soil layer or soil containing drift gravel without damaging the pile end, the pile end can be strengthened; the closed pile end is to put a pile shoe on the pile end, which is mostly used for end-bearing piles.

[0004] Existing steel pipe piles are susceptible to corrosion and are easily affected by the surrounding environment during use, thereby reducing their service life. At the same time, when grouting the inside of the steel pipe, the grouting is poured through the top of the steel pipe through an external pipeline, and the pouring process is slow. At the same time, the steel pipe will be damaged during the pouring process, thereby reducing the service life of the steel pipe pile. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems and provide a multifunctional small steel pipe pile which is well combined with the soil, has high bearing capacity and is suitable for various stress conditions.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a multifunctional small steel pipe pile, including a cap, a boss and a steel pipe, the upper part of the boss is fixedly connected to the cap, the lower part of the boss is fixedly connected to the steel pipe, steel bars are arranged inside the cap, the bottom of the steel bars are connected to the boss, a pile steel pipe is installed in the steel pipe, the upper end of the pile steel pipe is located in the cap, a first connecting sleeve and a second connecting sleeve are sleeved on the pile steel pipe, the first connecting sleeve and the second connecting sleeve are arranged up and down, the steel bars are welded around the pile steel pipe, a grouting pipe is arranged in the pile steel pipe, and the grouting pipe is arranged parallel to the pile steel pipe.

[0007] Preferably, the steel pipe is made of Q235B steel, the steel pipe is shot blasted and rust-proofed to meet Sa2.5 grade requirements, and the outer surface of the steel pipe is painted with thick-build epoxy paint and alkyd topcoat. The dry film thickness formed by the thick-build epoxy paint is 80um, and the dry film thickness formed by the alkyd topcoat is 40um.

[0008] Preferably, a slurry outlet hole is opened at the lower part of the pile steel pipe, the diameter of the slurry outlet hole is 10 mm, and the spacing between adjacent slurry outlet holes at upper and lower positions is 400-500 mm.

[0009] Preferably, the cross-section of the slurry outlet hole is plum blossom-shaped, and a plurality of slurry outlet holes are arranged in a staggered manner.

[0010] Preferably, the steel bars are bent into a "7"-shaped structure, and there are four steel bars arranged in a circle.

[0011] Preferably, a rubber sealing water stop strip, a waterproof ointment, a waterproof reinforcement layer and a waterproof coiled material are sequentially arranged around the steel bar from top to bottom, and the waterproof reinforcement layer and the waterproof coiled material have the same structure.

[0012] Preferably, the end of the steel pipe is provided with impermeable concrete.

[0013] Preferably, the first connecting sleeve and the second connecting sleeve have the same structure, the inner surface of the first connecting sleeve is an internal thread structure, the outer surface of the pile steel pipe is provided with external threads, and the first connecting sleeve is threadedly connected to the pile steel pipe.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model provides a multifunctional small steel pipe pile, which is well combined with the soil and has high bearing capacity. It is suitable for various stress conditions and can be used for both pressure bearing and anti-pulling.

[0016] 2. The utility model has high durability, and the steel pipe can be plated steel pipe, and cracks can be ignored when used for pull-out resistance. It is suitable for various situations and can be used for mobile work under various restricted conditions, especially in narrow and low spaces.

[0017] 3. The utility model is easy to process, simple to obtain materials, and can be mass-produced. It can be used for new projects and renovation and drawing projects. The connection structure is simple, the construction is convenient, and the construction quality is easy to ensure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a multifunctional small steel pipe pile of the utility model;

[0019] Figure 2 It is a schematic diagram of the connection of the cap, boss, steel pipe and steel bar of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection between the steel bar and the pile steel pipe of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the first connecting sleeve of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the utility model pile steel pipe;

[0023] Figure 6 It is a schematic diagram of the use status of the steel bar of the utility model.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. Cap; 2. Boss; 3. Steel pipe; 4. Steel bar; 5. Pile steel pipe; 6. Grouting pipe; 31. Steel pipe hole; 41. Rubber sealing water stop strip; 42. Waterproof grease; 43. Waterproof reinforcement layer; 44. Waterproof membrane; 51. First connecting sleeve; 52. Second connecting sleeve; 53. Grouting hole. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] like Figures 1 to 6 As shown, the utility model provides a multifunctional small-sized steel pipe pile, comprising a cap 1, a boss 2 and a steel pipe 3, the upper part of the boss 2 is fixedly connected to the cap 1, the lower part of the boss 2 is fixedly connected to the steel pipe 3, a steel bar 4 is arranged inside the cap 1, the bottom of the steel bar 4 is connected to the boss 2, a pile steel pipe 5 is installed in the steel pipe 3, the upper end of the pile steel pipe 5 is located in the cap, a first connecting sleeve 51 and a second connecting sleeve 52 are sleeved on the pile steel pipe 5, the first connecting sleeve 51 and the second connecting sleeve 52 are arranged up and down, the steel bar 4 is welded around the pile steel pipe 5, a grouting pipe 6 is arranged in the pile steel pipe 5, and the grouting pipe 6 is arranged parallel to the pile steel pipe 5.

[0027] The end of the grouting pipe 6 extends out of the cap 1 , and external equipment performs grouting into the interior of the pile steel pipe 5 through the grouting pipe 6 .

[0028] The material of the steel pipe 3 is Q235B steel. The steel pipe 3 is shot blasted to remove rust and reaches the Sa2.5 grade requirement. The outer surface of the steel pipe 3 is painted with thick paste epoxy paint and alkyd topcoat. The dry film thickness formed by the thick paste epoxy paint is 80um, and the dry film thickness formed by the alkyd topcoat is 40um. In actual use, a galvanized steel pipe can be used according to the use requirements. Thereby increasing the service life of the steel pipe 3.

[0029] A slurry outlet hole 53 is provided at the lower part of the pile steel pipe 5. The diameter of the slurry outlet hole 53 is 10 mm. The spacing between adjacent slurry outlet holes 53 at upper and lower positions is 400-500 mm, preferably 450 mm.

[0030] In this embodiment, the quality of the steel pipe 3 meets the requirements of Carbon Structural Steel BG / T700.

[0031] The cross section of the slurry outlet holes 53 is plum blossom-shaped, and the slurry outlet holes 53 are vertically distributed linearly, and multiple vertically divided slurry outlet holes 53 are arranged in a staggered manner. That is, the slurry outlet holes 53 in each row are staggered with the slurry outlet holes 53 in the adjacent row.

[0032] The bottom of the steel pipe 3 is provided with steel pipe holes 31 , and the number and positions of the steel pipe holes 31 correspond one-to-one to the slurry outlet holes 53 .

[0033] The steel bar 4 is bent into a "7" shape, and there are four steel bars 4 arranged in a circle. A rubber sealing water stop strip 41, a waterproof ointment 42, a waterproof reinforcement layer 43 and a waterproof roll 44 are arranged around the steel bar 4 from top to bottom, and the waterproof reinforcement layer 43 and the waterproof roll 44 have the same structure. The rubber sealing water stop strip 41, the waterproof ointment 42, the waterproof reinforcement layer 43 and the waterproof roll 44 are arranged in a ring around the steel bar 4.

[0034] The durability of the utility model can be improved by adding rubber sealing water stop strip 41, waterproof ointment 42, waterproof reinforcement layer 43 and waterproof roll material 44. The steel pipe 3 can be a plated steel pipe, and cracks can be ignored when used for pull-out resistance. It is suitable for various situations and can be used for mobile work under various restricted conditions, especially in narrow and low spaces.

[0035] The end of the steel pipe 3 is provided with impermeable concrete, which is located at the top of the steel pipe 3 to prevent external debris from entering the steel pipe 3, thereby preventing interference with the material poured inside the steel pipe 3. When the steel pipe 3 is extended, adjacent steel pipes 3 are connected by welding, and the weld quality grade is level 2.

[0036] The first connecting sleeve 51 and the second connecting sleeve 52 have the same structure. The inner surface of the first connecting sleeve 51 is an internal thread structure, and the outer surface of the pile steel pipe 5 is provided with an external thread. The first connecting sleeve 51 is threadedly connected to the pile steel pipe 5 .

[0037] In this embodiment, the number of grouting pipes 6 is two and they are arranged in parallel. The lengths of the two grouting pipes 6 can be changed according to the actual grouting requirements. Grouting operation starts from the bottom of the steel pipe 3 through grouting pipes 6 of different heights and positions, which can avoid damage to the steel pipe 3 during the pouring process. At the same time, grouting starts from the bottom of the steel pipe 3, and the pouring effect is good. As a result, the steel pipe pile is well combined with the soil and has a high bearing capacity. It is suitable for a variety of stress conditions and can be used for pressure bearing. It can also be used for pull-out resistance.

[0038] The utility model is easy to process, has simple materials, and can be mass-produced. It can be used for new projects and renovation and drawing projects. The connection structure is simple, the construction is convenient, and the construction quality is easy to ensure.

[0039] Those skilled in the art will appreciate that the embodiments described herein are intended to help readers understand the principles of the present invention, and should be understood that the protection scope of the present invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical inspirations disclosed in the present invention without departing from the essence of the present invention, and these variations and combinations are still within the protection scope of the present invention.

Claims

1. A multifunctional small steel pipe pile, characterized in that: The invention comprises a cap (1), a boss (2) and a steel pipe (3), wherein the upper part of the boss (2) is fixedly connected to the cap (1), and the lower part of the boss (2) is fixedly connected to the steel pipe (3). A steel bar (4) is arranged inside the cap (1), and the bottom of the steel bar (4) is connected to the boss (2). A pile steel pipe (5) is installed inside the steel pipe (3), and the upper end of the pile steel pipe (5) is located inside the cap (1). A first connecting sleeve (51) and a second connecting sleeve (52) are sleeved on the pile steel pipe (5), and the first connecting sleeve (51) and the second connecting sleeve (52) are arranged up and down. The steel bar (4) is welded around the pile steel pipe (5), and a grouting pipe (6) is arranged inside the pile steel pipe (5), and the grouting pipe (6) is arranged in parallel with the pile steel pipe (5).

2. A multifunctional small steel pipe pile according to claim 1, characterized in that: The material of the steel pipe (3) is Q235B steel. The steel pipe (3) is shot blasted to remove rust and reaches the Sa2.5 grade requirement. The outer surface of the steel pipe (3) is painted with a thick-build epoxy paint and an alkyd topcoat. The dry film thickness formed by the thick-build epoxy paint is 80 um, and the dry film thickness formed by the alkyd topcoat is 40 um.

3. The multifunctional small steel pipe pile according to claim 1, characterized in that: The lower part of the pile steel pipe (5) is provided with a slurry outlet hole (53), the diameter of the slurry outlet hole (53) is 10 mm, and the spacing between adjacent slurry outlet holes (53) at upper and lower positions is 400-500 mm.

4. A multifunctional small steel pipe pile according to claim 3, characterized in that: The slurry outlet holes (53) are arranged in a staggered manner.

5. The multifunctional small steel pipe pile according to claim 1, characterized in that: The steel bars (4) are bent into a "7"-shaped structure, and there are four steel bars (4) arranged in a circle.

6. The multifunctional small steel pipe pile according to claim 1, characterized in that: A rubber sealing water stop strip (41), a waterproof ointment (42), a waterproof reinforcement layer (43) and a waterproof coiled material (44) are sequentially arranged around the steel bar (4) from top to bottom, and the waterproof reinforcement layer (43) and the waterproof coiled material (44) have the same structure.

7. The multifunctional small steel pipe pile according to claim 1, characterized in that: The end of the steel pipe (3) is provided with impermeable concrete.

8. The multifunctional small steel pipe pile according to claim 1, characterized in that: The first connecting sleeve (51) and the second connecting sleeve (52) have the same structure. The inner surface of the first connecting sleeve (51) is an internal thread structure, and the outer surface of the pile steel pipe (5) is provided with an external thread. The first connecting sleeve (51) is threadedly connected to the pile steel pipe (5).

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