Bolt connection type steel pipe pile

Abstract

The utility model discloses a bolt connection type steel pipe pile, which comprises an upper section steel pipe pile and a lower section steel pipe pile which are connected with each other, and is characterized by further comprising a bolt and an anti-drop bolt, an anti-drop hole is arranged at the front end of the bolt, the anti-drop bolt is inserted and fixed in the anti-drop hole, and the upper section steel pipe pile and the lower section steel pipe pile are connected with each other. The lower end of the upper section steel pipe pile and the upper end of the lower section steel pipe pile are correspondingly provided with inserting structures, the upper section steel pipe pile and the lower section steel pipe pile are mutually inserted to form a superposed section, and the upper section steel pipe pile and the lower section steel pipe pile are each provided with two sets of through holes penetrating in the radial direction at the superposed section. The positions of the two groups of through holes in the lower section of steel pipe pile and the positions of the two groups of through holes in the upper section of steel pipe pile are matched and consistent, and are staggered up and down to form an included angle, and the upper section of steel pipe pile and the lower section of steel pipe pile are fixed through plug pins arranged in the through holes in a penetrating manner and anti-falling bolts arranged in the anti-falling holes in an inserted manner after being connected in an inserted manner. The steel pipe pile is convenient to assemble, disassemble and maintain, the steel pipe pile is connected safely and firmly, the construction efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe piles, and particularly relates to a pin-connected steel pipe pile. Background Art

[0002] In the construction of various buildings, bridges, docks and other projects, steel pipe piles are widely used. The connections of traditional steel pipe piles usually include welding connection and flange connection. During the actual construction process, the welding quality in the welding connection is greatly affected by the technical level of welders, there are many unstable factors in quality, high temperature will be generated during the welding process, which may cause local deformation of the steel pipe pile. The welding operation requires a certain amount of time and process requirements, and the construction efficiency is relatively low. The flange connection increases the cost investment of the steel pipe pile, is uneconomical, the flange bolt connection is cumbersome, the connection efficiency is not high, the processing accuracy requirements of the flange are high, the bolt strength requirements are high, and the on-site connection operation requirements are relatively high.

[0003] Therefore, in order to promote the development of the steel pipe pile connection technology, improve the connection efficiency, connection reliability and convenience of the steel pipe pile, reduce the cost and construction difficulty, it is necessary to develop a new steel pipe pile connection construction method to provide a new choice for engineering construction. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a pin-connected steel pipe pile, which can achieve fast and efficient connection, greatly shorten the construction time, improve the construction efficiency and reduce the overall cost.

[0005] In order to achieve the above technical effects, the technical solution adopted by the utility model is:

[0006] A pin-connected steel pipe pile includes an upper steel pipe pile and a lower steel pipe pile which are connected to each other. It is characterized in that it further includes a pin and an anti-loosening bolt. The front end of the pin is provided with an anti-loosening hole, and the anti-loosening bolt is inserted and fixed in the anti-loosening hole. The lower end of the upper steel pipe pile and the upper end of the lower steel pipe pile are correspondingly provided with a plug-in structure. After they are plugged into each other, an overlapping section is formed. Both the upper steel pipe pile and the lower steel pipe pile are provided with two groups of radially penetrating through holes at the overlapping section. The positions of the two groups of through holes on the lower steel pipe pile are matched and aligned with the positions of the two groups of through holes on the upper steel pipe pile, and are staggered up and down and form an included angle. After the upper steel pipe pile and the lower steel pipe pile are plugged into each other, they are fixed by the pin inserted in the through hole and the anti-loosening bolt inserted in the anti-loosening hole.

[0007] Further, the central lines of the two groups of through holes on the upper steel pipe pile are perpendicular to each other.

[0008] Further, a limiting structure is further arranged on the joint surface of the upper steel pipe pile and the lower steel pipe pile at the overlapping section. The limiting structure is a strip-shaped groove and a strip-shaped rib which are axially arranged and cooperate with each other.

[0009] Furthermore, a number of spiral blades with the same spiral direction are equidistantly arranged on the outer wall of the lower steel pipe pile from top to bottom.

[0010] Furthermore, the outer diameter of the spiral blade at the lowermost end of the lower steel pipe pile is larger than that of the other spiral blades.

[0011] Furthermore, the lowermost spiral blade is a large blade, and its outer diameter is 2-3 times the outer diameter of the steel pipe pile body. The other spiral blades are small blades, and their outer diameters are 1.5-2.5 times the outer diameter of the steel pipe pile body.

[0012] Furthermore, the pitches of the large blade and all the small blades are the same.

[0013] Furthermore, a pile tip is provided at the bottom of the lower steel pipe pile, and the pile tip is formed by welding four identical toothed steel strips.

[0014] Compared with the prior art, in the present utility model, a plug-in structure is correspondingly provided at the lower end of the upper steel pipe pile and the upper end of the lower steel pipe pile, and the two are fixed by two pins that are vertically and horizontally staggered at the overlapping section after the two are plugged together. This facilitates the installation, disassembly and maintenance of the steel pipe pile. At the same time, the connection of the steel pipe pile is safe and reliable, ensuring the smooth progress of the construction work, improving the construction efficiency and reducing the cost.

[0015] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded view of the present utility model;

[0017] Figure 2 is a front view of the present utility model;

[0018] Figure 3 is Figure 1 a partial enlarged view of part B of

[0019] Figure 4 is Figure 2 a partial enlarged view of part A of

[0020] The reference numerals and corresponding names in the drawings are:

[0021] 1. Upper steel pipe pile, 2. Lower steel pipe pile, 21. Large blade

[0022] 22. Small blade, 3. Bolt pin, 4. Anti - detachment bolt,

[0023] 5. Pile tip, 51. Steel strip, 6. Through - hole,

[0024] 7. Strip - shaped rib. Specific implementation mode

[0025] A bolt - pin - connected steel pipe pile, as Figure 1 、 2 shown in Figure 3, includes an upper - section steel pipe pile 1, a lower - section steel pipe pile 2, a bolt pin 3 and an anti - detachment bolt 4. Among them, the inner and outer diameters of the upper - section steel pipe pile 1 and the lower - section steel pipe pile 2 are the same. The lower end of the upper - section steel pipe pile 1 and the upper end of the lower - section steel pipe pile 2 are correspondingly provided with a plug - in structure. After they are plugged into each other, an overlapping section is formed. Both the upper - section steel pipe pile 1 and the lower - section steel pipe pile 2 are provided with two groups of radially - penetrating through - holes 6 at the overlapping section. The positions of the two groups of through - holes 6 on the lower - section steel pipe pile 2 match the positions of the two groups of through - holes 6 on the upper - section steel pipe pile 1. The two groups of through - holes 6 on the same steel pipe pile are vertically staggered and perpendicular to each other. The bolt pin 3 has a large head and a pin rod connected to the center of the large head. The front end of the pin rod 3 is provided with an anti - detachment hole. The bolt pin 3 is inserted into the through - holes 6 of the two connected steel pipe piles. The large head of the bolt pin 3 abuts against the outer surface of one steel pipe pile, and the anti - detachment hole is exactly located at the other surface of this steel pipe pile. The anti - detachment bolt 4 is inserted and fixed in the anti - detachment hole. After the upper - section steel pipe pile 1 and the lower - section steel pipe pile 2 are plugged into each other, they can be fixed by using the bolt pin 3 inserted into the through - hole 6 and the anti - detachment bolt 4 inserted into the anti - detachment hole.

[0026] The utility model forms vertically - staggered through - holes on the overlapping section formed by the mutually - plugged upper - section steel pipe pile and the lower - section steel pipe pile, and uses bolt pins for plugging and fixing. The operation is simple and fast, greatly shortening the connection time required, improving the construction efficiency, being convenient for disassembly, installation and maintenance; at the same time, it can effectively ensure the firmness of the connection between the upper - and lower - section steel pipe piles, not being easy to loosen under stress, enhancing the connection stability; compared with the traditional welding or flange connection methods, the utility model does not require complex welding equipment and processes, and also avoids the cumbersome installation process of flange connection, simplifies the construction process, saves the labor, materials for welding, and the manufacturing cost of the flange, has relatively low requirements for the construction environment, and can better adapt to different engineering site conditions.

[0027] Preferably, as Figure 3 shown, the upper - section steel pipe pile 1 and the lower - section steel pipe pile 2 are also provided with a limiting structure on the fitting surface at the overlapping section. The limiting structure is a strip - shaped groove (not shown in the figure) with a rectangular cross - section and a strip - shaped rib 7 that are axially arranged and cooperate with each other. Among them, the strip - shaped groove is arranged on the fitting surface of one of the upper - section steel pipe pile or the lower - section steel pipe pile, and the strip - shaped rib 7 is arranged on the other fitting surface. The limiting structure is preferably two radially - symmetrically arranged or four cross - shaped arranged. The limiting structure can be arranged at the position of the through - hole 6 or can be staggered with the position of the through - hole 6.

[0028] In the utility model, a concave-convex limiting structure with a rectangular cross-section is arranged on the joint surface of the overlapping section, so that during the construction process of screwing in the steel pipe pile, the strip-shaped convex ribs can be limited by the strip-shaped grooves, greatly reducing the burden on the pins and the possibility of deformation, and facilitating the disassembly, repair and maintenance of the upper and lower steel pipe piles after construction.

[0029] Preferably, as shown in Figure 1 , 2 , a plurality of spiral blades with the same rotation direction are equidistantly arranged on the outer wall of the lower steel pipe pile 2 from top to bottom, and the outer diameter of the spiral blade at the lowermost end of the lower steel pipe pile 2 is larger than that of other spiral blades. The spiral blade at the lowermost end is a large blade 21, and its outer diameter is 2-3 times the outer diameter of the steel pipe pile body. Other spiral blades are small blades 22, and their outer diameters are 1.5-2.5 times the outer diameter of the steel pipe pile body. The pitches of the large blade 21 and all the small blades 22 are the same.

[0030] In the utility model, a plurality of spiral blades are arranged on the steel pipe pile body, and the spiral blade at the lowermost end is larger than other spiral blades, thereby significantly improving the bearing capacity and the stability of the bearing capacity of the steel pipe pile; the large blade makes the steel pipe pile have an enlarged head, increasing the foundation expansion effect of the steel pipe pile, and the plurality of spiral blades make the steel pipe pile have multi-point bearing capacity.

[0031] Preferably, as shown in Figure 1 , 2 , 4, a pile tip 5 is further arranged at the bottom of the lower steel pipe pile 2. The pile tip 5 is formed by processing four identical L-shaped obtuse-angle structural steel strips 51. The four steel strips 51 are arranged circumferentially below the lower steel pipe pile 2, one end extends into the lower steel pipe pile 2 and is welded to the inner wall of the lower steel pipe pile 2, and the other end gathers on the axis of the lower steel pipe pile 2 and is welded and fixed. The outer side of the steel strip 51 located outside the lower steel pipe pile 2 is a continuous toothed structure.

[0032] In the utility model, a toothed pile tip is arranged at the bottom of the pile, and an opening structure is formed between adjacent two steel strips, so that the soil can smoothly enter the steel pipe pile during the drilling process, reducing the drilling resistance.

[0033] The utility model is not limited to the above specific embodiments. For those of ordinary skill in the art, starting from the above concept, all kinds of transformations made without creative labor fall within the protection scope of the utility model.

Claims

1. A bolt-connected steel pipe pile, comprising an upper section steel pipe pile and a lower section steel pipe pile connected to each other, characterized in that: It also includes a latch and an anti-dropout bolt, the front end of the latch is provided with an anti-dropout hole, the anti-dropout bolt is inserted and fixed in the anti-dropout hole, the lower end of the upper steel pipe pile and the upper end of the lower steel pipe pile are correspondingly provided with a plug-in structure, and the two are plugged into each other to form an overlapping section, and the upper and lower steel pipe piles are both provided with two groups of radially penetrating through holes at the overlapping section, the positions of the two groups of through holes on the lower steel pipe pile match the positions of the two groups of through holes on the upper steel pipe pile, and are staggered up and down to form an angle, and the upper and lower steel pipe piles are fixed by the latch inserted in the through hole and the anti-dropout bolt inserted in the anti-dropout hole after being plugged into the lower steel pipe pile.

2. The bolt-connected steel pipe pile according to claim 1, characterized in that: The center lines of the two groups of through holes on the upper section of the steel pipe pile are perpendicular to each other.

3. The bolt-connected steel pipe pile according to claim 2, characterized in that: The upper section steel pipe pile and the lower section steel pipe pile are also provided with a limiting structure on the fitting surface of the overlapping section, and the limiting structure is a strip groove and a strip convex rib which are axially arranged and matched with each other.

4. The bolt-connected steel pipe pile according to claim 1, characterized in that: A plurality of spiral blades with the same rotation direction are arranged on the outer wall of the lower steel pipe pile at equal distances from top to bottom.

5. The bolt-connected steel pipe pile according to claim 4, characterized in that: The outer diameter of the spiral blade located at the lowermost end of the lower steel pipe pile is greater than the outer diameters of other spiral blades.

6. The bolt-connected steel pipe pile according to claim 5, characterized in that: The spiral blade at the bottom is a large blade, and its outer diameter is 2-3 times the outer diameter of the steel pipe pile body, and the other spiral blades are small blades, and their outer diameters are 1.5-2.5 times the outer diameter of the steel pipe pile body.

7. The bolt-connected steel pipe pile according to claim 6, characterized in that: The pitch of the large blade is the same as that of all the small blades.

8. The bolt-connected steel pipe pile according to claim 1, characterized in that: A pile tip is arranged at the bottom of the lower steel pipe pile, and the pile tip is welded by four identical toothed steel strips.

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