Spiral stiffening rib steel pipe pile with expanded pile end

Abstract

The utility model provides a spiral stiffening rib steel pipe pile with an expanded pile end, which comprises a first steel pipe pile, a second steel pipe pile and a blade assembly connected with the bottom end of the first steel pipe pile, the blade assembly comprises a first blade and a second blade, a blade notch is formed between the first blade and the second blade, cutting edges are arranged on the edges of the first blade and the second blade, a preset included angle is formed between the first blade and the radial direction of the first steel pipe pile, and the first blade and the second blade are in central symmetry in the axial direction of the first steel pipe pile. The blades on the edges of the first blade and the second blade are used for rotary excavating and sinking, noise pollution is avoided in the construction process, and the bearing capacity and the bearing capacity stability of the steel pipe pile can be remarkably improved after the blades are rotated into soil; spiral stiffening ribs are arranged on the outer wall of the first steel pipe pile, so that underground soil around the pile cannot be loosened, and the influence on the surrounding environment is small; meanwhile, the steel pipe piles are connected through the upper and lower connectors, welding is not needed on site, the joint time is short, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to a steel pipe pile, in particular to a spiral stiffening rib steel pipe pile with an enlarged head at the pile end. Background Art

[0002] With the rapid development of my country's construction industry, the scope of urban construction is constantly increasing, and land resources are becoming increasingly scarce. The development and utilization of urban underground space has become a current hot spot. Pile foundation is a common building foundation in geotechnical engineering to improve the bearing capacity of the foundation and the stability of the building. At present, domestic pile foundations are mainly cast-in-place piles and prefabricated piles.

[0003] Steel pipe piles are a type of building material used in foundation engineering, mainly used for the reinforcement and support of the foundation. This type of pile is a tubular structure made of steel, usually in a circular shape. Steel pipe piles are widely used in construction engineering, bridge engineering, wharf engineering and other fields. Their main function is to increase the bearing capacity of the soil and improve the stability of the foundation.

[0004] During the construction of conventional bored piles, the mud used to protect the wall will cause certain environmental pollution, and the mud skin will reduce the friction between the pile body and the surrounding soil, resulting in a decrease in bearing capacity. The construction quality is difficult to guarantee and the construction period is long. Precast pile construction has a greater impact on the surrounding environment, has greater construction noise pollution, and has a lower bearing capacity, so it is not suitable for use in cities. Utility Model Content

[0005] The utility model aims to provide a spiral stiffening rib steel pipe pile with an enlarged head at the pile end, so as to solve the problems in the background technology.

[0006] In order to achieve the above object, the utility model provides the following technical solutions:

[0007] A spiral stiffening rib steel pipe pile with an enlarged pile end, comprising:

[0008] The first steel pipe pile,

[0009] a second steel pipe pile, the bottom end of which is fixed to the top end of the first steel pipe pile via a connecting portion, and

[0010] A blade assembly connected to the bottom end of the first steel pipe;

[0011] The blade assembly includes a first blade and a second blade, a blade cutout is formed between the first blade and the second blade, edges of the first blade and the second blade are provided with blades, the first blade forms a preset angle with the radial direction of the first steel pipe pile, and the first blade and the second blade are centrally symmetrical along the axial direction of the first steel pipe pile.

[0012] Optionally, the first blade and the second blade are semicircular.

[0013] Optionally, the diameters of the first blade and the second blade are 2-3.5 times that of the first steel pipe pile.

[0014] Optionally, a spiral stiffening rib is formed at the bottom end of the outer wall of the first steel pipe pile upward from the blade assembly, and the radial angle between the spiral stiffening rib and the first steel pipe is the same as the preset angle.

[0015] Optionally, the preset angle is 5°-20°.

[0016] Optionally, the thickness of the spiral stiffening rib is 1.5 times the thickness of the first steel pipe pile.

[0017] Optionally, a first joint is formed at the top end of the first steel pipe pile, and a second joint is formed at the bottom end of the second steel pipe pile. The diameter of the first joint is greater than the diameter of the second joint. A first bolt hole is opened on the outer wall of the first joint, and a second bolt hole is opened on the outer wall of the second joint. The diameters of the first bolt hole and the second bolt hole are the same. When the first joint is sleeved on the second joint, the first bolt hole and the second bolt hole are connected.

[0018] Optionally, the connecting portion includes a first joint, a second joint and a high-strength bolt, and the high-strength bolt passes through the first bolt hole and the second screw hole to fix the first joint and the second joint.

[0019] Optionally, the first joint and the first steel pipe pile are of an integrally stamped structure, and the second joint and the second steel pipe pile are of an integrally stamped structure.

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

[0021] 1. The utility model adopts the technology of rotary pressing, and the spiral stiffening rib steel pipe pile is rotated by rotating the casing equipment, and the blades on the edges of the first blade and the second blade are used for rotary excavation and sinking. There is no noise pollution during the construction process, and the equipment occupies a small area. Since the diameters of the first blade and the second blade are larger than the first steel pipe pile, the blades can significantly improve the bearing capacity and bearing capacity stability of the steel pipe pile after being rotated into the soil; at the same time, spiral stiffening ribs are arranged on the outer wall of the first steel pipe pile to prevent the underground soil around the pile from loosening, and the impact on the surrounding environment is small.

[0022] 2. Steel pipe piles are connected through upper and lower joints. No welding is required on site. The joining time only takes about 15 minutes to complete. Compared with welding, the construction period is greatly shortened. At the same time, it can be applied to various types of large-diameter and thick-walled piles.

[0023] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the preferred embodiments of the utility model are described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of a spiral stiffening rib steel pipe pile with an enlarged pile end head of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the connection part of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the blade assembly of the utility model.

[0027] Reference numerals:

[0028] 1. First steel pipe pile; 2. Second steel pipe pile; 3. Connection part; 4. Spiral stiffening rib; 5. First blade; 6. Second blade; 7. Second joint; 8. Second bolt hole; 9. First joint; 10. First bolt hole; 11. High-strength bolt; 12. Blade cutout. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 it can be indirectly connected 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.

[0032] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Figure 1 A steel pipe pile with spiral stiffening ribs 4 and an enlarged pile end head shown in one embodiment of the utility model comprises: a first steel pipe pile 1, a second steel pipe pile 2, and a blade assembly.

[0034] The top end of the first steel pipe pile 1 is connected to the second steel pipe pile 2 via the connecting portion 3 , and the bottom end of the first steel pipe pile 1 is connected to the blade assembly.

[0035] See also Figure 3 , shows the blade assembly shown in this embodiment, the blade assembly includes a first blade 5 and a second blade 6, a blade cutout 12 is formed between the first blade 5 and the second blade 6, the edges of the first blade 5 and the second blade 6 are provided with cutting edges, the first blade 5 and the radial direction of the first steel pipe pile 1 form a preset angle, and the first blade 5 and the second blade 6 are centrally symmetrical along the axial direction of the first steel pipe pile 1.

[0036] In order to improve the bearing capacity and bearing capacity stability of the steel pipe pile, the expansion effect of the blades is utilized. In a preferred embodiment of the present invention, the first blade 5 and the second blade 6 are semicircular. The diameter of the first blade 5 and the second blade 6 is 2-3.5 times that of the first steel pipe pile 1. In other embodiments, the first blade 5 and the second blade 6 can be other shapes of the same size, and they can be centrally symmetrical along the axial direction of the first steel pipe pile 1.

[0037] In order to prevent the underground soil around the pile from loosening and minimize the impact on the surrounding environment, a spiral stiffening rib 4 is formed at the bottom end of the outer wall of the first steel pipe pile 1 from the blade assembly upward, and the spiral stiffening rib 4 extends to the middle of the first steel pipe pile 1. The angle between the spiral stiffening rib 4 and the radial direction of the first steel pipe is the same as the preset angle, that is, the spiral stiffening rib 4 is parallel to the first blade 5 or the second blade 6, which is conducive to the pile sinking into the soil.

[0038] Optionally, the preset angle is 5°-20°, which can be 5°, 10°, 15°, 20°25° and any degree between 5° and 20° to achieve the effect of the present invention.

[0039] Optionally, the thickness of the spiral stiffening rib 4 is 1.5 times the thickness of the first steel pipe pile 1 .

[0040] See also Figure 2, the specific structure of the connection part 3, in a preferred embodiment of the utility model, a first joint 9 is formed at the top end of the first steel pipe pile 1, and a second joint 7 is formed at the bottom end of the second steel pipe pile 2. The diameter of the first joint 9 is larger than the diameter of the second joint 7. A first bolt hole 10 is formed on the outer wall of the first joint 9, and a second bolt hole 8 is formed on the outer wall of the second joint 7. The first bolt hole 10 and the second bolt hole 8 have the same diameter. When the first joint 9 is sleeved on the second joint 7, the first bolt hole 10 and the second bolt hole 8 are connected. The connection part 3 includes a first joint 9, a second joint 7 and a high-strength bolt 11. The high-strength bolt 11 passes through the first bolt hole 10 and the second screw hole to fix the first joint 9 and the second joint 7. The steel pipe piles are connected through the first joint 9 and the second joint 7. No welding is required on site. The joining time only takes about 15 minutes to complete, which greatly shortens the construction period compared with welding.

[0041] As mentioned above, the diameter of the first joint 9 may also be smaller than the diameter of the second joint 7 , and the effect of the present invention can also be achieved by using the arrangement in which the second joint 7 is sleeved on the first joint 9 .

[0042] In a preferred embodiment of the utility model, the first joint 9 and the first steel pipe pile 1 are stamped into one structure, and the second joint 7 and the second steel pipe pile 2 are stamped into one structure. In other embodiments, welding or other connection methods can also be used to achieve the effect of the utility model, which is not limited here.

[0043] The utility model adopts the technology of rotary pressing, and the steel pipe pile with spiral stiffening rib 4 is rotated by rotating casing equipment, and the blades on the edges of the first blade 5 and the second blade 6 are used to perform rotary excavation and sinking. Since the diameters of the first blade 5 and the second blade 6 are larger than the first steel pipe pile 1, the blades can significantly improve the bearing capacity and bearing capacity stability of the steel pipe pile after being rotated into the soil; at the same time, the spiral stiffening rib 4 is arranged on the outer wall of the first steel pipe pile 1 so that the underground soil around the pile will not loosen, and the impact on the surrounding environment is small; at the same time, the steel pipe pile is connected by upper and lower joints, and no welding is required on site. The joining time only takes about 15 minutes to complete, which greatly shortens the construction period compared with welding joining, and can be applied to various types of large-diameter and thick-walled piles.

[0044] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A spiral stiffening rib steel pipe pile with an enlarged pile end, characterized in that: include: The first steel pipe pile, a second steel pipe pile, the bottom end of which is fixed to the top end of the first steel pipe pile via a connecting portion, and A blade assembly connected to the bottom end of the first steel pipe; The blade assembly includes a first blade and a second blade, a blade cutout is formed between the first blade and the second blade, edges of the first blade and the second blade are provided with cutting edges, the first blade forms a preset angle with the radial direction of the first steel pipe pile, and the first blade and the second blade are centrally symmetrical along the axial direction of the first steel pipe pile.

2. The spirally stiffened steel pipe pile with an enlarged pile end according to claim 1, characterized in that: The first blade and the second blade are semicircular.

3. The spirally stiffened steel pipe pile with an enlarged pile end according to claim 1 or 2, characterized in that: The diameters of the first blade and the second blade are 2-3.5 times that of the first steel pipe pile.

4. The spirally stiffened steel pipe pile with an enlarged pile end according to claim 1, characterized in that: A spiral stiffening rib is formed at the bottom end of the outer wall of the first steel pipe pile upward from the blade assembly, and the angle between the spiral stiffening rib and the radial direction of the first steel pipe is the same as the preset angle.

5. The spirally stiffened steel pipe pile with an enlarged pile end according to claim 1 or 4, characterized in that: The preset angle is 5°-20°.

6. The spirally stiffened steel pipe pile with an enlarged pile end according to claim 4, characterized in that: The thickness of the spiral stiffening rib is 1.5 times the thickness of the first steel pipe pile.

7. The spirally stiffened steel pipe pile with an enlarged pile end according to claim 1, characterized in that: A first joint is formed at the top end of the first steel pipe pile, and a second joint is formed at the bottom end of the second steel pipe pile. The diameter of the first joint is greater than the diameter of the second joint. A first bolt hole is opened on the outer wall of the first joint, and a second bolt hole is opened on the outer wall of the second joint. The diameters of the first bolt hole and the second bolt hole are the same. When the first joint is sleeved on the second joint, the first bolt hole and the second bolt hole are connected.

8. The spirally stiffened steel pipe pile with an enlarged pile end according to claim 7, characterized in that: The connecting portion includes a first joint, a second joint and a high-strength bolt, and the high-strength bolt passes through the first bolt hole and the second screw hole to fix the first joint and the second joint.

9. The spirally stiffened steel pipe pile with an enlarged pile end according to claim 7, characterized in that: The first joint and the first steel pipe pile are of a stamped integral structure, and the second joint and the second steel pipe pile are of a stamped integral structure.

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