A power transmission line driven steel pipe pile structure

Abstract

The utility model provides a kind of transmission line press-in type steel pipe support disc pile structure, including double-layer pile pipe and support expansion device, the double-layer pile pipe includes outer tube body and inner tube body, and the interlayer for accommodating the support expansion device is formed between outer tube body and inner tube body, the support expansion outlet that is passed to interlayer is equipped on the outer tube body, the position of the support expansion device is opposite to support expansion outlet, it has the storage state of complete accommodation in interlayer, and the support expansion state of partial extension support expansion outlet. The utility model makes full use of the characteristics of pipe pile structure, can adapt to a variety of geological environment to carry out fast pile pressing and driving, and does not need to additionally make reinforcing bar and pour pile body concrete, with high adaptability, low cost, short construction cycle and other significant advantages.

Description

Technical Field

[0001] This utility model relates to a push-in steel pipe support pile structure for power transmission lines. Background Technology

[0002] According to the foundation type, the foundations of transmission lines are mainly classified into excavated foundations, slab foundations, stepped foundations, and cast-in-place pile foundations. These foundations are mostly excavated manually or mechanically, with steel reinforcement fabrication, concrete pouring and curing. They generally have disadvantages such as complex construction, cumbersome processes, and long pouring and curing cycles. Moreover, different foundation types need to be changed according to geological conditions, resulting in poor adaptability.

[0003] Currently, steel pipe piles are widely used in engineering construction due to their mature technology, reliable quality, and fast construction speed. However, since conventional steel pipe pile structures are only cylindrical tubes, they cannot achieve base expansion after being driven into the pile, which limits the compressive / pull-out bearing capacity of steel pipe piles. Utility Model Content

[0004] The purpose of this utility model is to propose a driven steel pipe support pile structure for power transmission lines, realizing a new type of driven support foundation for power transmission lines that can adapt to various geological environments. The specific technical contents are as follows:

[0005] A type of driven steel pipe pile structure for power transmission lines includes a double-layer pile pipe and a support expansion device. The double-layer pile pipe comprises an outer pipe body and an inner pipe body, with an interlayer formed between the outer and inner pipe bodies to accommodate the support expansion device. The outer pipe body has a support expansion outlet extending into the interlayer. The support expansion device is positioned opposite to the support expansion outlet, exhibiting both a fully contained state within the interlayer and a partially extended state extending out of the support expansion outlet. This pipe pile structure can adapt to different geological environments to achieve rapid pile driving, and the expansion state of the support expansion device enables the pile to hold the soil bearing layer, thereby improving its compressive and tensile bearing capacity.

[0006] Preferably, the expansion device includes a lower pressure rod, an upper expansion arm, and a lower expansion arm. The upper end of the upper expansion arm is hinged to the lower pressure rod, and the lower end of the upper expansion arm is hinged to the upper end of the lower expansion arm. A support platform is provided within the interlayer below the expansion device, and the support platform is hinged to the lower end of the lower expansion arm. As the lower pressure rod moves downward, the upper and lower expansion arms extend out of the expansion outlet. During the expansion process, the upper and lower expansion arms fold towards each other, forming a triangular structure at their hinge joints. This not only facilitates insertion into the soil but also allows the downward pressure torque component to be more effectively concentrated at the hinge joint, easily completing the expansion operation.

[0007] Preferably, the pressure rod is provided with a limiting platform, the outer edge of which abuts against the inner wall of the outer tube, and the inner edge of which abuts against the outer wall of the inner tube. The function of the limiting platform is to ensure that the force and stroke direction of the pressure rod are always downward, thus protecting the pressure rod from bending under pressure and ensuring the direction of the torque of the pressure rod on the support arm.

[0008] Preferably, the top of the pressure rod is provided with an end plate, which is used to apply pressure to the pressure rod to move it downward, and to weld and fix it to the double-layer pile pipe after the expansion is completed.

[0009] Preferably, the expansion outlet is covered with a thin film to prevent soil from entering the interlayer through the expansion outlet during pile driving, thereby hindering the expansion action of the expansion device.

[0010] Preferably, the upper and lower ends of the double-layer pile pipe are respectively provided with sealing plates to seal the interlayer, and the sealing plate at the upper end can be removed. The sealing plate at the upper end of the pile pipe is fixed to the pile pipe during the pile driving process. It is removed after the pile pipe is driven into the design elevation, so that the pressure rod can be lowered to apply force to make it move downward and perform the support expansion operation.

[0011] Preferably, the interlayer is provided with two or more expansion devices, which are equidistantly distributed along the circumference, and the outer tube is provided with expansion outlets corresponding to each expansion device. The design of multiple expansion devices not only ensures the uniformity of the expansion force, but also reduces the volume of a single expansion device (expansion arm), which is more conducive to reducing the resistance of the expansion arm entering the soil during expansion.

[0012] Preferably, a limiting device is also provided to keep the hinged upper and lower support arms in an outward orientation, that is, to ensure that the hinged parts of the upper and lower support arms can always move in the direction of the support arm outlet when subjected to downward pressure; the limiting device includes an upper limit rod and a lower limit rod, the upper end of the upper limit rod is connected to the lower pressure rod to move with the displacement of the lower pressure rod, the lower end of the upper limit rod is provided with a first limiting part, the lower end of the lower limit rod is connected to the support platform to make it stand on the support platform, and the upper end of the lower limit rod is provided with a second limiting part, which stops when the upper limit rod moves up to contact the first limiting part and the second limiting part.

[0013] Preferably, the upper end of the upper limit rod is provided with a third limiting part, and the lower end of the lower limit rod is provided with a fourth limiting part. The upper limit rod stops when it moves down to the point where the first limiting part abuts against the fourth limiting part and the second limiting part contacts the third limiting part.

[0014] Preferably, the upper limit rod includes a first vertical segment, a first horizontal segment, a second vertical segment, and a second horizontal segment connected sequentially from top to bottom, with the third limiting part formed on the first horizontal segment and the first limiting part formed on the second horizontal segment;

[0015] The lower limit rod includes a third horizontal segment, a third vertical segment, a fourth horizontal segment, and a fourth vertical segment connected sequentially from top to bottom. The second limiting part is formed on the third horizontal segment, and the fourth limiting part is formed on the fourth horizontal segment.

[0016] Compared with the prior art, the advantages of this utility model include:

[0017] 1) Fully utilizing the structural characteristics of pipe piles, they can adapt to various geological environments for rapid pile driving without the need for additional steel reinforcement or concrete pouring. They have significant advantages such as high adaptability, low cost, and short construction period, which overcomes the shortcomings of existing power transmission foundations such as poor adaptability, complicated construction, and long cycle.

[0018] 2) An expandable support device was added to the pipe pile structure. After the pipe pile is driven to a suitable position, it is quickly expanded and fixed. The simple structure greatly increases the compressive / extension bearing capacity of the pipe pile. The entire pile driving and expansion process is simple to operate and has high construction efficiency.

[0019] 3) A limiting device is provided at the expansion device to keep it in an outward orientation. When subjected to downward pressure, the hinge of the upper expansion arm and the lower expansion arm can always move in the direction of the expansion outlet, ensuring the smooth operation of the expansion. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention (in its stored state).

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention (in the expanded state).

[0022] Figure 3 This is a top view of the structure of this utility model (in the expanded state).

[0023] Figure 4 This is a cross-sectional structural diagram of the present invention (with the thin film).

[0024] Figure 5 This is a schematic diagram of the limiting device of this utility model (upward movement stroke).

[0025] Figure 6 This is a schematic diagram of the limiting device of this utility model (downward stroke).

[0026] Figure 7 This is a disassembly diagram of the limiting device of this utility model. Detailed Implementation

[0027] The following description, in conjunction with the accompanying drawings, further illustrates the proposed solution: Example 1

[0028] See appendix Figure 1-4 A type of driven steel pipe pile structure for transmission lines includes a double-layer pile pipe 1 and a support expansion device 2. The double-layer pile pipe 1 includes an outer pipe body 11 and an inner pipe body 12. An interlayer 10 for accommodating the support expansion device 2 is formed between the outer pipe body 11 and the inner pipe body 12. The outer pipe body 11 is provided with a support expansion outlet 110 extending into the interlayer 10. The support expansion device 2 is positioned opposite to the support expansion outlet 110 and is completely housed within the interlayer 10 (see attached diagram). Figure 1 ), and the branch expansion state of the locally extended branch expansion outlet 110 (see appendix) Figure 2 The deformable pipe pile structure of this utility model can adapt to different geological environments to achieve rapid pile driving, and through the expansion state of the expansion device 2, it can grasp the soil bearing layer and improve the compressive / extraction bearing capacity of the pipe pile.

[0029] Specifically, the expansion device 2 includes a lower pressure rod 21, an upper expansion arm 22, and a lower expansion arm 23. The upper end of the upper expansion arm 22 is hinged to the lower pressure rod 21, and the lower end of the upper expansion arm 22 is hinged to the upper end of the lower expansion arm 23. A support platform 13 is provided within the interlayer 10 below the expansion device 2, and the support platform 13 is hinged to the lower end of the lower expansion arm 23. The position of the support platform 13 is generally not higher than the lower edge of the expansion outlet 110. See Appendix. Figure 2 As the downward pressure rod 21 moves downward, the upper expansion arm 22 and the lower expansion arm 23 pass through the expansion outlet 110. During the expansion process, the upper expansion arm 22 and the lower expansion arm 23 fold towards each other, causing their hinge portion A to form a triangular structure. This not only makes it easier to insert into the soil, but also allows the downward pressure torque component to be more effectively concentrated at the hinge portion A, easily completing the expansion operation.

[0030] The lowering rod 21 is provided with a limiting platform 24. The outer edge of the limiting platform 24 abuts against the inner wall of the outer tube 11, and the inner edge of the limiting platform 24 abuts against the outer wall of the inner tube 12. The function of the limiting platform 24 is to ensure that the force and stroke direction of the lowering rod 21 is always downward, which protects the lowering rod 21 from bending under pressure and ensures the direction of the torque of the lowering rod 21 on the expansion arm. The top of the lowering rod 21 is provided with an end platform 25. The end platform 25 is used to apply pressure to it to make the lowering rod 21 move downward, and is also used to weld and fix it to the double-layer pile pipe after the expansion is completed.

[0031] For further details, please see the appendix. Figure 4, a thin film 3 covers the diameter-expanding outlet 110, which can prevent soil from pouring into the interlayer from the diameter-expanding outlet 110 during pile pressing, thereby hindering the diameter-expanding action of the diameter-expanding device 2. Sealing plates 14 are respectively provided at the upper and lower ends of the double-layer pile pipe 1 to seal the interlayer, and the sealing plate 14 at the upper end can be removed. The sealing plate 14 at the upper end of the pile pipe is fixed to the pile pipe during the pile pressing process, and is removed after the pile pipe is pressed to the designed elevation, so that force can be applied to the lower pressing rod 21 to move it downward and perform the diameter-expanding operation.

[0032] Further, referring to the appen Figure 3 , eight diameter-expanding devices 2 are provided in the interlayer 10, and the diameter-expanding devices 2 are equally distributed along the circumferential direction in a "meter" shape; the outer pipe body 11 is provided with diameter-expanding outlets 110 corresponding to the diameter-expanding devices 2 one to one. The design of multiple diameter-expanding devices not only ensures the uniformity of the stress during diameter expansion, but also reduces the volume of a single diameter-expanding device (diameter-expanding arm), which is more conducive to reducing the resistance of the diameter-expanding arm entering the soil during diameter expansion.

[0033] The utility model makes full use of the structural characteristics of the pipe pile, can adapt to various geological environments for rapid pile pressing and driving, and does not require additional production of steel bars or pouring of pile body concrete. An expandable diameter-expanding device is added to the pipe pile structure, which can quickly expand and fix the diameter after the pipe pile is driven to a suitable position. The compressive / anti-pulling bearing capacity of the pipe pile is greatly increased with a simple structure, and the entire pile pressing and diameter expanding process is simple to operate, and has significant advantages such as high adaptability, low cost, strong operability, and short construction period. Example 2

[0034] referring to the appen Figures 5 to 7 , on the basis of the above Example 1, a limiting device 4 that can enable the diameter-expanding device 2 (the hinged upper diameter-expanding arm 22 and lower diameter-expanding arm 23) to always maintain an outward trend is further provided in the interlayer 10, that is, the hinged part of the upper diameter-expanding arm 22 and the lower diameter-expanding arm 23 can always move toward the diameter-expanding outlet 110 when subjected to downward pressure.

[0035] Specifically, the limiting device 4 includes an upper limiting rod 41 and a lower limiting rod 42. The upper end of the upper limiting rod 41 is connected to the lower pressing rod 21 (specifically connected to a limiting table 24 located at the bottom end of the lower pressing rod 21) to move along with the lower pressing rod 21. The lower end of the upper limiting rod 41 is provided with a first limiting part 41a. The lower end of the lower limiting rod 42 is connected to a support platform 13 so that it stands on the support platform 13, and the upper end of the lower limiting rod 42 is provided with a second limiting part 42a. The upper limiting rod 41 stops moving upward when the first limiting part 41a contacts the second limiting part 42a; at this time, the upper diameter-expanding arm 22 and the lower diameter-expanding arm 23 are retracted into the interlayer 10 and the included angle between them is still an obtuse angle, so the hinged part cannot concave inward any more, so that the hinged part can only deform and extend outward when pressed downward.

[0036] Furthermore, the upper end of the upper limit rod 41 is provided with a third limiting part 41b, and the lower end of the lower limit rod 42 is provided with a fourth limiting part 42b. The upper limit rod 41 stops when it moves down to the point where the first limiting part 41a abuts against the fourth limiting part 42b and the second limiting part 42a contacts the third limiting part 41b. At this time, the upper support arm 22 and the lower support arm 23 have passed through the support outlet 110 and inserted into the soil. At the same time, the angle between the upper support arm 22 and the lower support arm 23 is limited to decrease (i.e., it is kept at a suitable acute angle, such as 60 degrees, 45 degrees, etc.), so as to ensure the firmness of the support structure and maintain better compressive / pull-out bearing capacity.

[0037] In one specific implementation, the upper limit rod 41 includes a first vertical segment 411, a first horizontal segment 412, a second vertical segment 413, and a second horizontal segment 414 connected sequentially from top to bottom. The third limiting part 41b is formed on the first horizontal segment 412, and the first limiting part 41a is formed on the second horizontal segment 414.

[0038] The lower limiting rod 42 includes a third horizontal segment 421, a third vertical segment 422, a fourth horizontal segment 423, and a fourth vertical segment 424 connected sequentially from top to bottom. The second limiting part 42a is formed on the third horizontal segment 421, and the fourth limiting part 42b is formed on the fourth horizontal segment 424.

[0039] Essentially, the first horizontal segment 412, the second vertical segment 413, and the second horizontal segment 414 form a "C" opening, while the third horizontal segment 421, the third vertical segment 422, and the fourth horizontal segment 423 form another "C" opening. These two "C" openings are interlocked, and the vertical travel is limited by the contact of the corresponding horizontal segments.

[0040] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. A power transmission line driven steel tubular pile supported disc structure, characterized by: The device includes a double-layer pile pipe and a branch expansion device. The double-layer pile pipe includes an outer pipe body and an inner pipe body. An interlayer for accommodating the branch expansion device is formed between the outer pipe body and the inner pipe body. The outer pipe body is provided with a branch expansion outlet that extends into the interlayer. The branch expansion device is positioned opposite to the branch expansion outlet. It has a fully housed state within the interlayer and a branch expansion state in which it partially extends out of the branch expansion outlet.

2. The power transmission line press-in steel pipe support pile structure according to claim 1, characterized in that: The expansion device includes a lower pressure rod, an upper expansion arm, and a lower expansion arm. The upper end of the upper expansion arm is hinged to the lower pressure rod, and the lower end of the upper expansion arm is hinged to the upper end of the lower expansion arm. A support platform is provided in the interlayer below the expansion device, and the support platform is hinged to the lower end of the lower expansion arm. As the lower pressure rod moves downward, the upper and lower expansion arms extend out of the expansion outlet.

3. The structure of power transmission line driven steel tubular pile with disc, according to claim 2, characterized in that: The pressure rod is provided with a limiting platform. The outer edge of the limiting platform abuts against the inner wall of the outer tube, and the inner edge of the limiting platform abuts against the outer wall of the inner tube.

4. The structure of power transmission line driven steel tubular pile with plate, according to claim 2, characterized by: The top of the pressure rod is provided with an end plate, which is used to apply pressure to the pressure rod to move it downward, and to weld and fix it to the double-layer pile pipe after the expansion is completed.

5. The electric transmission line driven steel pipe pile disc structure according to claim 1, wherein: The branch outlet is covered with a thin film.

6. The electric transmission line driven steel pipe pile disc structure according to claim 1, wherein: The upper and lower ends of the double-layer pile pipe are respectively provided with sealing plates to seal the interlayer, and the sealing plate at the upper end can be removed.

7. The structure of the power transmission line driven steel tubular pile with a disc according to any of claims 1-6, characterized in that: The interlayer is provided with two or more branch expansion devices, which are equidistantly distributed along the circumference, and the outer tube is provided with branch expansion outlets corresponding to the branch expansion devices.

8. A power transmission line driven steel tubular pile supported disc structure according to any one of claims 2 to 6, characterised in that: It also includes a limiting device for keeping the hinged upper and lower extension arms in an outward orientation. The limiting device includes an upper limit rod and a lower limit rod. The upper end of the upper limit rod is connected to the lower pressure rod to move with the lower pressure rod. The lower end of the upper limit rod is provided with a first limiting part. The lower end of the lower limit rod is connected to the support platform to make it stand on the support platform. The upper end of the lower limit rod is provided with a second limiting part. It stops when the upper limit rod moves up to contact the first limiting part and the second limiting part.

9. The structure of power transmission line driven steel tubular pile with disc according to claim 8, characterized in that: The upper end of the upper limit rod is provided with a third limiting part, and the lower end of the lower limit rod is provided with a fourth limiting part. The upper limit rod stops when it moves down to the point where the first limiting part abuts against the fourth limiting part and the second limiting part contacts the third limiting part.

10. The electric transmission line driven steel tubular pile socketed disc pile structure according to claim 9, characterized in that: The upper limit rod includes a first vertical segment, a first horizontal segment, a second vertical segment, and a second horizontal segment connected sequentially from top to bottom. The third limiting part is formed on the first horizontal segment, and the first limiting part is formed on the second horizontal segment. The lower limit rod includes a third horizontal segment, a third vertical segment, a fourth horizontal segment, and a fourth vertical segment connected sequentially from top to bottom. The second limiting part is formed on the third horizontal segment, and the fourth limiting part is formed on the fourth horizontal segment.

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