Fabricated grouting type chambering steel pile of transmission tower in soft soil area and construction method of fabricated grouting type chambering steel pile

Abstract

The invention discloses an assembly type grouting reaming steel pile of a transmission tower in a soft soil area. The assembly type grouting reaming steel pile comprises a screw-in assembly, a plurality of reaming assemblies, a plurality of connecting assemblies, a top assembly, a transmission device and a powerful electromagnet. The screw-in assembly is of a hollow structure, a spiral anchor disc is arranged outside the screw-in assembly, a first clamping groove connected with the bottom of the transmission device in a clamped mode is formed in the screw-in assembly, and a powerful electromagnet is arranged at the top of the screw-in assembly. The bottom of a first connecting piece of the reaming assembly is connected with the top of a limiting pressure-bearing device, the bottom of the limiting pressure-bearing device is connected with the top of a second connecting piece, one end of each first steel arm assembly is movably connected with the bottom of the corresponding first connecting piece, and the other end of each first steel arm assembly is hinged to one end of the corresponding second steel arm assembly. The other end of the second steel arm assembly is movably connected with the top of the second connecting piece, and the first steel arm assembly and the second steel arm assembly are arranged in a V shape. Construction can be conveniently conducted in the soft soil area, and construction is convenient.

Description

Technical Field

[0001] The invention relates to an improvement in the construction technology of a power transmission tower in a soft soil area, belongs to the field of tower construction, and in particular to an assembled grouting-type expanded-hole steel pile of a power transmission tower in a soft soil area and a construction method. Background Art

[0002] Foundation engineering is an important part of building construction. It is the part that bears the weight of the building, used to transfer the load of the building to the foundation, and ensure the stability and safety of the building. Foundation engineering construction refers to the first work in building construction, mainly including foundation treatment, foundation filling, foundation pouring, etc. Foundation engineering construction includes: brick foundation construction, rubble stone foundation construction, rubble stone concrete construction, etc. However, when traditional transmission towers are constructed in soft soil areas, due to the low bearing capacity of the foundation, the pile body is too long, and it is difficult for large pile foundation machinery to enter the site. The silt and quicksand layers in the river network area are thick, and the pit wall is easy to collapse during the foundation construction process, resulting in the foundation pit getting bigger and bigger, which not only increases the amount of work, but also affects safety and construction period.

[0003] A Chinese patent application with application number CN201910334055.9 and application date April 24, 2019 discloses a multi-stage serial assembled recyclable micro steel pipe pile and a construction method thereof, belonging to the technical field of engineering piles. The first section of the steel pipe pile body is composed of a spiral drill bit, a thick-walled steel pipe and a spirally driven steel pipe connected in series in sequence, and each subsequent section of the pile body is composed of a thick-walled steel pipe and a spirally driven steel pipe arranged and assembled in an interval manner. The multi-stage serial assembled recyclable steel pipe pile adopts a thick-walled steel pipe pile and a spiral steel pipe pile in an interval combination as the pile body. The drill bit is also provided with a spiral blade, and a small drilling rig can be used to use a clamp to drill the steel pipe into the soil, completely avoiding the drilling operation of the micro steel pipe pile; however, the above scheme does not solve the problem that it is inconvenient to construct a transmission tower in soft soil areas.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of this patent application, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Summary of the invention

[0005] The purpose of the present invention is to overcome the problem in the prior art that it is inconvenient to construct a transmission tower in a soft soil area, and to provide an assembled grouting-type expanded-hole steel pile and a construction method for a transmission tower in a soft soil area that is convenient for construction in a soft soil area.

[0006] To achieve the above purpose, the technical solution of the present invention is: an assembled grouting type reaming steel pile for a power transmission tower in a soft soil area, the assembled grouting type reaming steel pile for a power transmission tower in a soft soil area comprises a screw-in assembly, a plurality of reaming assemblies, a plurality of connecting assemblies, a top assembly, a transmission device and a strong electromagnet;

[0007] The screw-in assembly is an internal hollow structure, a first spiral anchor plate for assisting screwing into the soil is arranged on the outside, a first slot for engaging with the bottom of the transmission device is arranged inside the screw-in assembly, and a strong electromagnet is arranged on the top of the screw-in assembly;

[0008] The hole expansion assembly includes a first connecting member with an upward opening, a second connecting member with a downward opening, a first steel arm assembly, a second steel arm assembly and a position limiting pressure device, the bottom of the first connecting member is connected to the top of the position limiting pressure device, the bottom of the position limiting pressure device is connected to the top of the second connecting member, one end of all the first steel arm assemblies is movably connected to the bottom of the first connecting member, the other end of the first steel arm assembly is hinged to one end of the second steel arm assembly, the other end of the second steel arm assembly is movably connected to the top of the second connecting member, the first steel arm assembly and the second steel arm assembly are arranged in a V shape, and the first steel arm assembly and the second steel arm assembly are arranged on the outside of the position limiting pressure device; the top of the first connecting member and the bottom of the second connecting member are both provided with strong electromagnets;

[0009] The connecting assembly is provided with a second spiral anchor plate for assisting in screwing into the soil on the outside, and a second clamping groove for clamping with the bottom of the transmission device is provided on the inside. Strong electromagnets are provided on the top and bottom of the connecting assembly.

[0010] The top component is an internal hollow structure, a third spiral anchor plate is arranged on the outside to assist in screwing into the soil, a third slot is arranged inside the top component to be engaged with the bottom of the transmission device, and a strong electromagnet is arranged at the bottom of the top component;

[0011] The bottom of the top component is connected to the top of the first connecting piece at the top by a strong electromagnet, the top of the screw-in component is connected to the bottom of the second connecting piece at the bottom by a strong electromagnet, the two adjacent reaming components are connected by a connecting component, the top of the first connecting piece is connected to the bottom of the connecting component by a strong electromagnet, and the bottom of the second connecting piece is connected to the top of the connecting component by a strong electromagnet.

[0012] The first connecting member and the second connecting member are symmetrically arranged T-shaped structures. The top of the first connecting member is cylindrical and the bottom is disc-shaped. The top of the second connecting member is disc-shaped and the bottom is cylindrical.

[0013] The top of the first connecting member is provided with a through opening, and the bottom of the second connecting member is provided with a bayonet adapted to the bottom of the transmission device.

[0014] Both ends of the first steel arm assembly are provided with first connecting grooves, the upper first connecting groove is movably connected to the bottom of the first connecting member, and the lower first connecting groove is rotatably connected to the second steel arm assembly.

[0015] A second connecting groove is formed at one end of the second steel arm assembly, and a connecting piece is provided at the other end. The connecting piece is rotatably matched with the first connecting groove below the first steel arm assembly, and the second connecting groove is rotatably connected to the top of the second connecting piece.

[0016] The transmission device comprises a hollow grouting pipe, a connecting end at the top and a clamp at the bottom, the bottom of the grouting pipe is inserted into the inner cavity of the clamp, a mounting opening is provided at the top of the connecting end, and the top of the grouting pipe passes through the mounting opening of the connecting end;

[0017] The card member is respectively connected with the first card slot, the second card slot and the third card slot.

[0018] The clamping member is arranged in a cross shape, and the first clamping slot, the second clamping slot and the third clamping slot are all cross-shaped.

[0019] A plurality of evenly distributed notches are formed on the top of the connecting end.

[0020] There are multiple limit pressure bearing devices, which are evenly distributed on the outside of the clamp.

[0021] A construction method for an assembled grouting-type expanded-hole steel pile for a power transmission tower in a soft soil region, the construction method for an assembled grouting-type expanded-hole steel pile for a power transmission tower in a soft soil region comprising the following steps:

[0022] Step 1: first connect the driving device to the transmission device, then mesh the transmission device with the first slot inside the screw-in component, and then start the driving device to drive the screw-in component to rotate, and rotate and press into the soil through the first spiral anchor plate on the surface of the screw-in component;

[0023] Step 2: first pull out the transmission device, then place the reaming assembly on the top of the screw-in assembly, so that the second connecting piece at the bottom of the reaming assembly is engaged with the top of the screw-in assembly, and then energize the strong electromagnet to adsorb the screw-in assembly and the reaming assembly, and then engage the first card groove inside the screw-in assembly through the transmission device to drive the screw-in assembly to rotate, and rotate the screw-in assembly and the reaming assembly into the soil;

[0024] Step 3: first pull out the transmission device, then engage the connecting assembly with the first connecting piece on the top of the hole expansion assembly, then energize the strong electromagnet to make the connecting assembly and the hole expansion assembly adsorb, then engage the transmission device with the second card slot inside the connecting assembly, drive the connecting assembly to rotate, and rotate the connecting assembly into the soil. At the same time, the connecting assembly is pressed downward, so that the first steel arm assembly and the second steel arm assembly on the hole expansion assembly open outward in an umbrella shape. When the limit pressure device shrinks to a preset height, the transmission device is stopped. At this time, the hole expansion assembly scrapes the surrounding soil to finally form a disc-shaped cavity;

[0025] Step 4: stack the hole expansion assembly and the connection assembly in sequence until the use height is reached, engage the top assembly with the topmost hole expansion assembly, and then energize the strong electromagnet to make the top assembly and the hole expansion assembly adsorb to form a steel pile, and then make the transmission device engage with the third card slot inside the top assembly to drive the top assembly to rotate, thereby driving the entire steel pile to rotate;

[0026] Step 5: Move the transmission device to the bottom of the screw-in assembly, inject water through the transmission device to soften the soil scraped from the bottom of the screw-in assembly into mud, then extract the mud and the steel pile through the transmission device, and finally fill the area of ​​the steel pile with concrete to finally form a pile body.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the present invention, an assembled grouting-type expanded hole steel pile and construction method for a power transmission tower in a soft soil area, the screw-in assembly is an internal hollow structure, a first spiral anchor plate is arranged on the outside to assist in screwing into the soil, a first slot is arranged inside the screw-in assembly to engage with the bottom of the transmission device, a strong electromagnet is arranged on the top of the screw-in assembly, the expanded hole assembly includes a first connecting piece with an upward opening, a second connecting piece with a downward opening, a first steel arm assembly, a second steel arm assembly and a limit pressure bearing device, the top assembly is an internal hollow structure, a third spiral anchor plate is arranged on the outside to assist in screwing into the soil, the inside of the top assembly A third card slot is provided to be connected with the bottom of the transmission device, and a strong electromagnet is provided at the bottom of the top component. When used, the traditional pile is divided into several assembled hollow pile sections, which are connected sequentially from top to bottom through the strong electromagnet. During the assembly process, no complicated mechanical connection operation is required, and the connection can be completed only through the adsorption of the electromagnet, which greatly improves the assembly efficiency. It is convenient for transportation when constructing in soft soil areas with poor road conditions and difficult material transportation. A spiral anchor plate is provided on the surface of the pile section. Only small machinery is needed to assist in the operation during construction, and heavy equipment such as large pile drivers is not needed, so the construction is simple. Therefore, the present invention is convenient for construction in soft soil areas and is easy to construct.

[0029] 2. In the assembled grouting type expanded hole steel pile and construction method of the power transmission tower in soft soil area of ​​the present invention, the bottom of the first connecting member is connected to the top of the limit pressure device, the bottom of the limit pressure device is connected to the top of the second connecting member, one end of all the first steel arm components is movably connected to the bottom of the first connecting member, the other end of the first steel arm component is hinged to one end of the second steel arm component, the other end of the second steel arm component is movably connected to the top of the second connecting member, the first steel arm component and the second steel arm component are arranged in a V shape, and the first steel arm component and the second steel arm component are arranged on the outside of the limit pressure device; the top of the first connecting member and the bottom of the second connecting member are both provided with strong electromagnets. When used, multiple expanded hole components are provided, and the transmission device is engaged with the connecting component, thereby driving the expanded hole components to rotate. At the same time, the steel arm scrapes the surrounding soil to form a dish-shaped cavity. After pouring concrete, a dish-shaped disk is formed around the pile, which helps to reduce the foundation settlement speed and improve the foundation's pull-out and anti-overturning capabilities. At the same time, it can prevent the soil around the pile from collapsing during the expanded hole process, thereby improving construction efficiency. Therefore, the present invention has high construction efficiency and simple operation.

[0030] 3. In the assembled grouting-type expanded hole steel pile and construction method of the power transmission tower in soft soil area of ​​the present invention, for areas with thick soft soil layer, a connecting component and an expanded hole component can be installed between the top component and the lowest expanded hole component to increase the anchoring depth of the pile body and improve the foundation stability, which has a wider application space. Therefore, the present invention has strong applicability and a large application space. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a connection diagram of the present invention.

[0033] Figure 3 It is a schematic diagram of the structure of the hole expansion component in the present invention.

[0034] Figure 4 It is a structural schematic diagram of the first steel arm assembly in the present invention.

[0035] Figure 5 It is a structural schematic diagram of the second steel arm assembly in the present invention.

[0036] Figure 6 It is a structural schematic diagram of the transmission device in the present invention.

[0037] Figure 7 It is a top view of the transmission device in the present invention.

[0038] Figure 8 It is a connection schematic diagram of the limit card slot in the present invention.

[0039] Fig. 9It is a schematic diagram of pile formation of the present invention.

[0040] In the figure: screw-in component 1, first slot 11, first spiral anchor plate 12, reaming component 2, first steel arm component 21, connecting slot 211, second steel arm component 22, connecting piece 221, first connecting piece 23, first vertical pipe 231, first side panel 232, second connecting piece 24, second vertical pipe 241, second side panel 242, second slot 25, first reaming component 26, second reaming component 27, third reaming component 28, connecting component 3, second spiral anchor plate 31, second connecting component 32, second slot 33, top component 4, transmission device 5, grouting pipe 51, clamping piece 52, connecting end 53, notch 54, limit pressure device 6, strong electromagnet 7, limit slot 8, pile body 9, tower foundation 10. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] Embodiment 1:

[0043] See also Figure 1 to Figure 2A prefabricated grouting type reaming steel pile for a power transmission tower in a soft soil area, the prefabricated grouting type reaming steel pile for a power transmission tower in a soft soil area comprises a screw-in assembly 1, a plurality of reaming assemblies 2, a plurality of connecting assemblies 3, a top assembly 4, a transmission device 5 and a strong electromagnet 7; the screw-in assembly 1 is an internal hollow structure, and a first spiral anchor plate 12 is arranged on the outside to assist in screwing into the soil, a first card slot 11 is arranged inside the screw-in assembly 1 to be engaged with the bottom of the transmission device 5, and a strong electromagnet 7 is arranged on the top of the screw-in assembly 1; the reaming assembly 2 comprises a first connecting piece with an opening facing upward 23, the second connecting member 24 with the opening facing downward, the first steel arm assembly 21, the second steel arm assembly 22 and the limit pressure device 6, the bottom of the first connecting member 23 is connected to the top of the limit pressure device 6, the bottom of the limit pressure device 6 is connected to the top of the second connecting member 24, one end of all the first steel arm assemblies 21 is movably connected to the bottom of the first connecting member 23, the other end of the first steel arm assembly 21 is hinged to one end of the second steel arm assembly 22, the other end of the second steel arm assembly 22 is movably connected to the top of the second connecting member 24, and the first steel arm assembly 21 and the second steel arm assembly 22 are connected. The first steel arm assembly 21 and the second steel arm assembly 22 are arranged in a V-shaped configuration, and are arranged on the outside of the position-limiting pressure-bearing device 6; the top of the first connecting member 23 and the bottom of the second connecting member 24 are both provided with a strong electromagnet 7; the outside of the connecting assembly 3 is provided with a second spiral anchor plate 31 for assisting in screwing into the soil, and the inside thereof is provided with a second card slot 33 for engaging with the bottom of the transmission device 5, and the top and bottom of the connecting assembly 3 are both provided with a strong electromagnet 7; the top assembly 4 is an internal hollow structure, and the outside thereof is provided with a third spiral anchor plate 42 for assisting in screwing into the soil, and the inside of the top assembly 4 is provided with a A third slot 41 is engaged with the bottom of the transmission device 5, and a strong electromagnet 7 is provided at the bottom of the top component 4; the bottom of the top component 4 is connected to the top of the top first connecting member 23 via a strong electromagnet 7, the top of the screw-in component 1 is connected to the bottom of the bottom second connecting member 24 via a strong electromagnet 7, the two adjacent reaming components 2 are connected via a connecting component 3, the top of the first connecting member 23 is connected to the bottom of the connecting component 3 via a strong electromagnet 7, and the bottom of the second connecting member 24 is connected to the top of the connecting component 3 via a strong electromagnet 7.

[0044] Embodiment 2:

[0045] Embodiment 2 is substantially the same as Embodiment 1, except that:

[0046] See also Figures 3 to 5, an assembled grouting-type expanded steel pile for a power transmission tower in a soft soil area, wherein the first connecting member 23 and the second connecting member 24 are symmetrically arranged T-shaped structures, the top of the first connecting member 23 is cylindrical, and the bottom thereof is disc-shaped, and the top of the second connecting member 24 is disc-shaped, and the bottom thereof is cylindrical; a through-hole is provided at the top of the first connecting member 23, and a bayonet 25 adapted to the bottom of a transmission device 5 is provided at the bottom of the second connecting member 24; first connecting grooves 211 are provided at both ends of the first steel arm assembly 21, the upper first connecting groove 211 is movably connected to the bottom of the first connecting member 23, and the lower first connecting groove 211 is rotatably connected to the second steel arm assembly 22; a second connecting groove 222 is provided at one end of the second steel arm assembly 22, and a connecting member 221 is provided at the other end, the connecting member 221 is rotatably matched with the first connecting groove 211 below the first steel arm assembly 21, and the second connecting groove 222 is rotatably connected to the top of the second connecting member 24.

[0047] When in use: When the first connecting member 23 and the second connecting member 24 are close to each other, a stable connecting force is generated through the interaction of the strong electromagnet 7. When the two components need to be connected quickly and firmly, the electromagnetic force can provide an immediate adsorption effect without the need for additional complex connection operations, thereby improving assembly efficiency.

[0048] Embodiment 3:

[0049] Embodiment 3 is substantially the same as Embodiment 1, except that:

[0050] See also Figure 6 to Figure 7 , an assembled grouting-type expanded-hole steel pile for a power transmission tower in a soft soil area, the bottom of a grouting pipe 51 is inserted into the inner cavity of a clamp 52, the clamp 52 is connected to the grouting pipe 51, a mounting port is provided at the top of a connecting end 53, the top of the grouting pipe 51 passes through the mounting port of the connecting end 53, and the grouting pipe 51 is used for injecting water and extracting mud; the clamp 52 is arranged in a "cross" shape, the clamp 52 is connected to the grouting pipe 51, and the cross-shaped structure may increase the contact area between the clamp 52 and the surrounding soil, and during the grouting process, the grouting pressure can be better dispersed, so that the mud can be more evenly diffused in the surrounding medium, thereby improving the grouting effect; a plurality of evenly distributed notches 54 are provided at the top of the connecting end 53; the number of the limit pressure-bearing devices 6 is four, which are distributed in a square shape on the outside of the clamp 52.

[0051] When applied: the limit pressure device 6 can control its height. In different construction stages or different engineering environments, the height of the limit pressure device 6 can be remotely adjusted as needed, thereby adjusting the height or level of the grouting device, which helps to adapt to complex construction sites and improve construction efficiency and accuracy.

[0052] Embodiment 4:

[0053] Embodiment 4 is substantially the same as Embodiment 1, except that:

[0054] See also Figure 8 A method for constructing an assembled grouting-type expanded-hole steel pile for a power transmission tower in a soft soil region, the method comprising the following steps:

[0055] Step 1: first connect the driving device to the transmission device 5, then mesh the transmission device 5 with the first slot 11 inside the screw-in component 1, and then start the driving device to drive the screw-in component 1 to rotate, and rotate and press into the soil through the first spiral anchor plate 12 on the surface of the screw-in component 1;

[0056] Step 2: first pull out the transmission device 5, then place the reaming component 2 on the top of the screw-in component 1, so that the second connecting piece 24 at the bottom of the reaming component 2 is engaged with the top of the screw-in component 1, and then energize the strong electromagnet 7 to make the screw-in component 1 and the reaming component 2 adsorb, and then the transmission device 5 is engaged with the first card groove 11 inside the screw-in component 1 to drive the screw-in component 1 to rotate, and the screw-in component 1 and the reaming component 2 are rotated and pressed into the soil;

[0057] Step 3, first pull out the transmission device 5, then engage the connecting component 3 with the first connecting piece 23 on the top of the hole expansion component 2, and then energize the strong electromagnet 7 to make the connecting component 3 and the hole expansion component 2 adsorb, and then make the transmission device 5 mesh with the second card groove 33 inside the connecting component 3, drive the connecting component 3 to rotate, and rotate the connecting component 3 into the soil. At the same time, the connecting component 3 is pressed downward, so that the first steel arm component 21 and the second steel arm component 22 on the hole expansion component 2 are opened outward in an umbrella shape. When the limit pressure device 6 shrinks to a preset height, the transmission device 5 is stopped. At this time, the hole expansion component 2 scrapes the surrounding soil and finally forms a disc-shaped cavity;

[0058] Step 4: stack the reaming assembly 2 and the connecting assembly 3 in sequence until the use height is reached, engage the top assembly 4 with the topmost reaming assembly 2, and then energize the strong electromagnet 7 to make the top assembly 4 and the reaming assembly 2 adsorb to form a steel pile, and then make the transmission device 5 engage with the third card slot 41 inside the top assembly 4 to drive the top assembly 4 to rotate, thereby driving the entire steel pile to rotate;

[0059] Step 5: Move the transmission device 5 to the bottom of the screw-in component 1, inject water through the transmission device 5 to soften the soil scraped from the bottom of the screw-in component 1 into mud, then extract the mud and the steel pile through the transmission device 5, and finally fill the area of ​​the steel pile with concrete to finally form the pile body 9.

[0060] Embodiment 5:

[0061] Embodiment 5 is substantially the same as Embodiment 4, except that:

[0062] See also Figures 8 to 9 A construction method for a prefabricated grouting type expanded hole steel pile foundation, the construction method is applied to the prefabricated grouting type expanded hole steel pile, the construction method comprises the following steps:

[0063] Step 1: first connect the driving device to the transmission device 5, then mesh the transmission device 5 with the first slot 11 inside the screw-in component 1, and then start the driving device to drive the screw-in component 1 to rotate, and rotate and press into the soil through the first spiral anchor plate 12 on the surface of the screw-in component 1, and make the top of the screw-in component 1 higher than the soil;

[0064] Step 2: first pull out the transmission device 5, and then place the first reaming component 26 on the top of the screw-in component 1, so that the second connecting piece 24 at the bottom of the first reaming component 26 is matched with the limiting groove 8 at the top of the screw-in component 1, and lubricating oil is evenly applied to the connection, and then the strong electromagnet 7 is energized to make the screw-in component 1 and the reaming component 2 adsorbed, and then the transmission device 5 is engaged with the first card groove 11 inside the screw-in component 1, and the screw-in component 1 is driven to rotate, and the screw-in component 1 and the first reaming component 26 are rotated and pressed into the soil, and the top of the first reaming component 26 is higher than the soil;

[0065] Step 3: first pull out the transmission device 5, then engage the connecting component 3 with the first connecting piece 23 at the top of the first hole expansion component 26, evenly apply lubricating oil to the connection, and then energize the strong electromagnet 7 to make the connecting component 3 and the first hole expansion component 26 adsorbed, and then make the transmission device 5 mesh with the second card slot 33 inside the connecting component 3, drive the connecting component 3 to rotate, rotate the connecting component 3 and press it into the soil, and make the top of the connecting component 3 higher than the soil; at the same time, the connecting component 3 is squeezed downward, and the first steel arm component 21 and the second steel arm component 22 on the first hole expansion component 26 are opened outward in an umbrella shape during the screwing process, and the transmission device 5 is stopped when the limit pressure device 6 shrinks to a preset height to ensure that the first hole expansion component 26 can reach the required depth. At this time, the first hole expansion component 26 scrapes the surrounding soil to finally form a disc-shaped cavity, which is used for subsequent soil reinforcement, pile foundation construction or other civil engineering needs;

[0066] Step 4: first pull out the transmission device 5, and place the second hole-expanding component 27 on the top of the connecting component 3 through a small lifting machine, so that the second connecting piece 24 at the bottom of the second hole-expanding component 27 is matched with the limiting groove 8 at the top of the connecting component 3, and lubricating oil is evenly applied to the connection, and then the strong electromagnet 7 is energized to make the second hole-expanding component 27 and the connecting component 3 firmly adsorbed, and then the transmission device 5 is engaged with the first card groove 11 inside the screw-in component 1 to drive the screw-in component 1 to rotate, with the help of the strong electromagnet 7 and the spiral anchor plate 31 on the surface of the screw-in component 1, The connecting component 3 is rotated and pressed into the soil and raised to a certain height above the ground. At the same time, the connecting component 3 is squeezed downward, and the first steel arm component 21 and the second steel arm component 22 on the second hole expansion component 27 are opened outward in an umbrella shape during the screwing process. When the limit pressure bearing device 6 is retracted to a preset height, the transmission device 5 is stopped to ensure that the second hole expansion component 27 can reach the required depth. At this time, the second hole expansion component 27 scrapes the surrounding soil to finally form a disc-shaped cavity, which is used for subsequent soil reinforcement, pile foundation construction or other civil engineering needs;

[0067] Step 5: stack the reaming assembly 2 and the connecting assembly 3 in sequence until the use height is reached, engage the top assembly 4 with the uppermost connecting assembly 3, apply lubricating oil evenly on the connection, and then energize the powerful electromagnet 7 to make the top assembly 4 and the connecting assembly 3 adsorb to form a steel pile, and then make the transmission device 5 mesh with the third slot 41 inside the top assembly 4 to drive the top assembly 4 to rotate, thereby driving the entire steel pile to rotate;

[0068] Step six: Move the transmission device 5 through the top component 4, all the hole expansion components 2, and all the connection components 3 in sequence to the bottom of the screw-in component 1, inject water through the transmission device 5 to soften the soil scraped from the bottom of the screw-in component 1 into mud, then extract the mud and the steel piles through the transmission device 5, and finally fill the area of ​​the steel piles with concrete to finally form a pile body 9, and then install the tower foundation 10 on the pile body 9.

[0069] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. An assembled grouting-type expanded-hole steel pile for power transmission towers in soft soil areas, characterized in that: The assembled grouting-type expanded hole steel pile for the power transmission tower in soft soil area comprises a screw-in assembly (1), a plurality of expanded hole assemblies (2), a plurality of connection assemblies (3), a top assembly (4), a transmission device (5) and a strong electromagnet (7); The screw-in assembly (1) is an internal hollow structure, and a first spiral anchor plate (12) is arranged on the outside to assist screwing into the soil body. A first clamping groove (11) is arranged inside the screw-in assembly (1) to be clamped with the bottom of the transmission device (5), and a strong electromagnet (7) is arranged on the top of the screw-in assembly (1); The hole expansion assembly (2) comprises a first connecting member (23) with an upward opening, a second connecting member (24) with a downward opening, a first steel arm assembly (21), a second steel arm assembly (22) and a position limiting pressure bearing device (6), wherein the bottom of the first connecting member (23) is connected to the top of the position limiting pressure bearing device (6), the bottom of the position limiting pressure bearing device (6) is connected to the top of the second connecting member (24), one end of each of the first steel arm assemblies (21) is movably connected to the bottom of the first connecting member (23), and the first steel arm assembly (21) is connected to the bottom of the first connecting member (23). The other end of the arm assembly (21) is hinged to one end of the second steel arm assembly (22), and the other end of the second steel arm assembly (22) is movably connected to the top of the second connecting member (24). The first steel arm assembly (21) and the second steel arm assembly (22) are arranged in a V shape, and the first steel arm assembly (21) and the second steel arm assembly (22) are arranged on the outside of the limiting pressure-bearing device (6); the top of the first connecting member (23) and the bottom of the second connecting member (24) are both provided with a strong electromagnet (7); The connecting assembly (3) is provided with a second spiral anchor plate (31) on the outside for assisting in screwing into the soil, and is provided with a second clamping groove (33) on the inside for clamping with the bottom of the transmission device (5), and a strong electromagnet (7) is provided on the top and bottom of the connecting assembly (3); The top component (4) is an internal hollow structure, and a third spiral anchor plate (42) is arranged on the outside to assist in screwing into the soil. A third clamping groove (41) is arranged inside the top component (4) to be clamped with the bottom of the transmission device (5), and a strong electromagnet (7) is arranged at the bottom of the top component (4); The bottom of the top component (4) is connected to the top of the top first connecting member (23) via a strong electromagnet (7), the top of the screw-in component (1) is connected to the bottom of the bottom second connecting member (24) via a strong electromagnet (7), two adjacent hole expansion components (2) are connected via a connecting component (3), the top of the first connecting member (23) is connected to the bottom of the connecting component (3) via a strong electromagnet (7), and the bottom of the second connecting member (24) is connected to the top of the connecting component (3) via a strong electromagnet (7).

2. The assembled grouting-type expanded-hole steel pile for power transmission tower in soft soil area according to claim 1 is characterized in that: The first connecting member (23) and the second connecting member (24) are symmetrically arranged T-shaped structures. The top of the first connecting member (23) is cylindrical and the bottom is disc-shaped. The top of the second connecting member (24) is disc-shaped and the bottom is cylindrical.

3. The assembled grouting-type expanded-hole steel pile for power transmission tower in soft soil area according to claim 1, characterized in that: The top of the first connecting member (23) is provided with a through opening, and the bottom of the second connecting member (24) is provided with a bayonet (25) adapted to the bottom of the transmission device (5).

4. The assembled grouting-type expanded-hole steel pile for power transmission tower in soft soil area according to claim 1, characterized in that: Both ends of the first steel arm assembly (21) are provided with first connecting grooves (211), the upper first connecting groove (211) is movably connected to the bottom of the first connecting member (23), and the lower first connecting groove (211) is rotatably connected to the second steel arm assembly (22).

5. The assembled grouting-type expanded-hole steel pile for power transmission tower in soft soil area according to claim 4, characterized in that: A second connecting groove (222) is provided at one end of the second steel arm assembly (22), and a connecting piece (221) is provided at the other end. The connecting piece (221) is rotatably matched with the first connecting groove (211) below the first steel arm assembly (21), and the second connecting groove (222) is rotatably connected to the top of the second connecting piece (24).

6. The assembled grouting-type expanded-hole steel pile for power transmission tower in soft soil area according to claim 1, characterized in that: The transmission device (5) comprises a hollow grouting pipe (51), a connecting end (53) at the top and a clamping piece (52) at the bottom. The bottom of the grouting pipe (51) is inserted into the inner cavity of the clamping piece (52). The top of the connecting end (53) is provided with a mounting opening. The top of the grouting pipe (51) passes through the mounting opening of the connecting end (53). The clamping member (52) is respectively clamped with the first clamping slot (11), the second clamping slot (33), and the third clamping slot (41).

7. The assembled grouting-type expanded-hole steel pile for power transmission tower in soft soil area according to claim 6, characterized in that: The clamping member (52) is arranged in a cross shape, and the first clamping slot (11), the second clamping slot (33) and the third clamping slot (41) are all in a cross shape.

8. The assembled grouting-type expanded-hole steel pile for power transmission tower in soft soil area according to claim 7, characterized in that: A plurality of evenly distributed notches (54) are formed on the top of the connection end (53).

9. The assembled grouting-type expanded-hole steel pile for power transmission tower in soft soil area according to claim 8, characterized in that: The number of the position-limiting pressure-bearing devices (6) is plural and evenly distributed on the outside of the clamping member (52).

10. A construction method for the assembled grouting-type expanded-hole steel piles for power transmission towers in soft soil areas as claimed in claim 1, characterized in that: The construction method of the assembled grouting-type expanded-hole steel piles for the power transmission tower in soft soil areas comprises the following steps: Step 1: first connect the driving device to the transmission device (5), then mesh the transmission device (5) with the first slot (11) inside the screw-in component (1), and then start the driving device to drive the screw-in component (1) to rotate, and rotate and press into the soil through the first spiral anchor plate (12) on the surface of the screw-in component (1); Step 2: firstly, pull out the transmission device (5), then place the hole expansion component (2) on the top of the screw-in component (1), so that the second connecting piece (24) at the bottom of the hole expansion component (2) is engaged with the top of the screw-in component (1), and then energize the strong electromagnet (7) to make the screw-in component (1) and the hole expansion component (2) adsorbed, and then the transmission device (5) is engaged with the first clamping groove (11) inside the screw-in component (1), so as to drive the screw-in component (1) to rotate, and the screw-in component (1) and the hole expansion component (2) are rotated and pressed into the soil; Step 3, first pull out the transmission device (5), then engage the connecting component (3) with the first connecting piece (23) at the top of the hole expansion component (2), then energize the strong electromagnet (7) to make the connecting component (3) and the hole expansion component (2) adsorb, then make the transmission device (5) mesh with the second card slot (33) inside the connecting component (3), drive the connecting component (3) to rotate, and rotate the connecting component (3) into the soil. At the same time, the connecting component (3) is pressed downward, so that the first steel arm component (21) and the second steel arm component (22) on the hole expansion component (2) are opened outward in an umbrella shape. When the limit pressure device (6) is retracted to a preset height, the transmission device (5) is stopped. At this time, the hole expansion component (2) scrapes the surrounding soil to finally form a disc-shaped cavity; Step 4: stack the hole expansion components (2) and the connection components (3) in sequence until the use height is reached, engage the top component (4) with the topmost hole expansion component (2), and then energize the strong electromagnet (7) to make the top component (4) and the hole expansion component (2) adsorb to form a steel pile, and then make the transmission device (5) engage with the third slot (41) inside the top component (4) to drive the top component (4) to rotate, thereby driving the entire steel pile to rotate; Step 5: Move the transmission device (5) to the bottom of the screw-in assembly (1), inject water through the transmission device (5) to soften the soil scraped from the bottom of the screw-in assembly (1) into mud, then extract the mud and the steel pile through the transmission device (5), and finally fill the area of ​​the steel pile with concrete to finally form a pile body (9).

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