Fast repairable tower foundation of transmission line and construction method thereof

Abstract

The present application relates to the field of power transmission tower foundation rapid repair, particularly relates to a kind of power transmission line rapid repair tower reusable assembly type hollow steel pipe pile foundation and its construction method;Through the design standard section steel pipe, the structure such as plug key with cross plum blossom key, bottom key, connecting plate, through the combination of multiple standard section steel pipes, cooperate with specific construction method, not only convenient construction, avoid the maintenance solidification period, greatly shorten construction period, greatly facilitate the repair of tower foundation.Foundation excavation construction is implemented in steel pipe, that is, steel pipe can realize the safety protection of foundation construction hole collapse, and the remaining soil is finally backfilled in the hollow steel pipe, to avoid the pollution of remaining soil to the environment.Finally, the assembly type hollow steel pipe pile foundation of the present application can be reused after the use of the foundation is completed, by removing the bottom key, cross plum blossom key and marking section connecting plate from top to bottom, and then lifting and excavating the standard section steel pipe.

Description

Technical Field

[0001] This invention relates to the field of rapid repair of transmission line tower foundations, and in particular to a reusable prefabricated hollow steel pipe pile foundation for rapid repair of transmission line towers and its construction method. Background Technology

[0002] Transmission lines are frequently affected by extreme natural environments (typhoons, ice storms, earthquakes, geological disasters, etc.), and tower collapses are common. Therefore, research on rapid repair technology for transmission lines provides technical support for power restoration under disasters, among which rapid repair of tower foundations is the key to rapid repair of transmission lines.

[0003] Transmission line tower foundations typically use cast-in-place concrete foundations, including slab foundations, pile foundations, and excavated foundations. The construction of these foundations and the attainment of concrete strength requirements require a certain construction period, which is not conducive to rapid emergency repairs of transmission line tower foundations. Precast assembled foundations, currently mainly including precast metal foundations and precast concrete foundations, are based on the calculation theory of slab foundations. They involve larger excavation depths and areas, and heavier foundations, making construction particularly challenging in geological environments with groundwater. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a reusable prefabricated hollow steel pipe pile foundation for transmission line towers that can be quickly repaired and its construction method. This foundation is suitable for the field of rapid repair foundations for transmission line towers and has the advantages of short construction period, environmental friendliness and low labor demand. It can effectively solve the shortcomings of traditional foundations under emergency repair construction conditions.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] Reusable prefabricated hollow steel pipe pile foundations for rapid repair of transmission line towers include:

[0007] The standard section steel pipe has multiple first ribs welded in a circumferential array on its inner wall, and first bolt holes are provided at both ends of the first ribs; the pipe wall of the standard section steel pipe has through cross-shaped perforations.

[0008] A connector, comprising a base and a cross-shaped key connected to the base, wherein the cross-shaped key has a cross-shaped cross section that matches the cross-shaped hole, and the width of the cross-shaped key gradually decreases in the direction away from the base.

[0009] A connecting plate, wherein the connecting plate is provided with a second bolt hole that matches the first bolt hole, and the connecting plate is used to connect the first ribs at the pipe ends of two standard steel pipe sections by bolts;

[0010] The bottom sealing key includes a circular base plate, an annular rib tube, and a second rib plate. The diameter of the circular base plate is smaller than the inner diameter of the standard section of steel pipe. The circular base plate has rib grooves that correspond one-to-one with each of the first rib plates. The annular rib tube is coaxially welded to the circular base plate. The outer extension of the annular rib tube is located at the root of the rib groove. The second rib plate is vertically welded to both sides of each rib groove. The second rib plate has a third bolt hole that matches the first bolt hole.

[0011] In the assembled state, the pipe ends of multiple standard steel pipe sections are connected by connecting plates and bolts. The narrow end of the cross-shaped spline key of the plug-in piece is inserted into the cross-shaped spline hole from the inside to the outside. The second rib of the bottom sealing key is connected to the first rib of the standard steel pipe section located at the end by bolts.

[0012] Furthermore, in the aforementioned reusable prefabricated hollow steel pipe pile foundation structure for rapid repair towers of transmission lines, the inner wall of the annular rib tube of the bottom key is also provided with a cross-shaped shoe plate.

[0013] Furthermore, in the aforementioned reusable prefabricated hollow steel pipe pile foundation structure for rapid repair towers of transmission lines, the cross-shaped shoe plate is equipped with lifting holes.

[0014] Furthermore, in the aforementioned reusable prefabricated hollow steel pipe pile foundation structure for rapid repair towers of transmission lines, each first rib plate is located on the same plane as the axis of the standard section steel pipe.

[0015] This invention also relates to a construction method for reusable prefabricated hollow steel pipe pile foundations for rapid repair towers of transmission lines. Based on the above-mentioned reusable prefabricated hollow steel pipe pile foundations for rapid repair towers of transmission lines, the construction method includes the following steps:

[0016] The standard section of steel pipe is excavated and pre-pressed for pipe sinking;

[0017] After the standard section of steel pipe is excavated and driven into place, the next standard section of steel pipe is connected on-site with bolts through the connecting plate;

[0018] After the excavation and sinking of the pipe pipe reaches the designed pile length and forms the pipe pile, the rib groove of the bottom sealing key is matched with the first rib plate of the standard section steel pipe at the top from above. Using the first rib plate as a track, the bottom sealing key is hoisted and sunk to the bottom of the pipe pile. The key is then locked and fixed by bolts passing through the first bolt hole of the standard section steel pipe at the bottom and the third bolt hole of the bottom sealing key.

[0019] After locking, the pipe pile is further pre-stressed to improve the tight contact between the pipe pile bottom sealing key and the foundation. The plug-in parts are installed by pressing the cross-shaped plum blossom holes of each standard section of steel pipe through a hydraulic device, so that the cross-shaped plum blossom key passes through the cross-shaped plum blossom holes from the inside to the outside.

[0020] After backfilling and compacting the soil inside the pipe pile, a bottom sealing key is attached to the upper end of the pipe pile, and the pile is locked and fixed by bolts passing through the first bolt hole of the top standard section steel pipe and the third bolt hole of the bottom sealing key.

[0021] The beneficial effects of this invention are as follows: By designing standard steel pipe sections, insert keys with cross-shaped keyways, bottom sealing keys, and connecting plates, and combining multiple standard steel pipe sections through splicing, coupled with specific construction methods, construction is not only convenient, but the curing and solidification period of concrete is avoided, greatly shortening the construction period and significantly facilitating emergency repairs of tower foundations. Simultaneously, the prefabricated hollow steel pipe pile foundation of this invention allows for foundation excavation to be carried out inside the steel pipe, achieving safety protection against foundation collapse. Excess soil is then backfilled into the hollow steel pipe, avoiding environmental pollution. Finally, after the foundation is used, the prefabricated hollow steel pipe pile foundation of this invention can be reused by removing the bottom sealing keys, cross-shaped keyways, and standard section connecting plates from top to bottom, followed by lifting and excavating the standard steel pipe sections. This invention achieves reusable and prefabricated foundations by adopting a prefabricated excavation and preloading method, avoiding the disadvantages of traditional cast-in-place foundations, such as one-time use and long construction and maintenance cycles. Compared with prefabricated slab foundations, it has better environmental adaptability and a smaller amount of construction earthwork. Attached Figure Description

[0022] Figure 1 This is a structural sectional view of a reusable prefabricated hollow steel pipe pile foundation for a transmission line rapid repair tower, according to a specific embodiment of the present invention.

[0023] Figure 2 This is a structural cross-sectional view of a standard section of steel pipe in a reusable prefabricated hollow steel pipe pile foundation for a transmission line rapid repair tower, according to a specific embodiment of the present invention.

[0024] Figure 3 This is an axial view of a standard section of steel pipe in a reusable prefabricated hollow steel pipe pile foundation for a transmission line rapid repair tower, according to a specific embodiment of the present invention.

[0025] Figure 4 An axial view of the bottom sealing key of a reusable prefabricated hollow steel pipe pile foundation for a transmission line rapid repair tower, according to a specific embodiment of the present invention.

[0026] Figure 5 for Figure 4 AA-direction cross-section diagram;

[0027] Figure 6 A side view of a connector for a reusable prefabricated hollow steel pipe pile foundation for a transmission line rapid repair tower, according to a specific embodiment of the present invention.

[0028] Figure 7 for Figure 6 BB-direction cross-section diagram;

[0029] Figure 8This is a schematic diagram of the connecting plate of a reusable prefabricated hollow steel pipe pile foundation for a transmission line rapid repair tower, according to a specific embodiment of the present invention.

[0030] Label Explanation:

[0031] 1. Standard section steel pipe; 11. First rib plate; 12. First bolt hole; 13. Cross-shaped and staggered holes;

[0032] 2. Connector; 21. Base; 22. Cross-shaped key;

[0033] 3. Connecting plate; 31. Second bolt hole;

[0034] 4. Bottom sealing key; 41. Circular base plate; 411. Rib groove; 42. Annular rib tube; 43. Second rib plate; 431. Third bolt hole; 44. Cross shoe plate; 441. Lifting hole. Detailed Implementation

[0035] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0036] Existing reinforced concrete foundations involve complicated construction procedures, long construction periods, and mechanized construction is greatly affected by geological and environmental factors.

[0037] Existing precast pile foundations require prefabrication and transportation of piles, resulting in complex logistics and high requirements for site flatness and lifting equipment. They also demand high construction precision, have poor geological adaptability, require significant initial investment, and may incur additional costs during transportation.

[0038] Existing prefabricated foundations mainly include prefabricated metal foundations and prefabricated concrete foundations. Based on the calculation theory of slab foundations, they have large foundation pit excavation depths and areas, and large foundation weights. Especially in geological environments with groundwater, foundation construction is quite difficult.

[0039] Please refer to Figures 1 to 8 To address the above problems, the specific embodiments of this invention relate to reusable prefabricated hollow steel pipe pile foundations for transmission line rapid repair towers, including:

[0040] The standard section steel pipe 1 has multiple first ribs 11 welded in a circumferential array on its inner wall, and first bolt holes 12 are provided at both ends of the first ribs 11; the pipe wall of the standard section steel pipe 1 is provided with through cross-shaped quincunx holes 13.

[0041] The connector 2 includes a base 21 and a cross-shaped key 22 connected to the base 21. The cross-shaped key 22 has a cross-shaped cross section that matches the cross-shaped hole 13. The width of the cross-shaped key 22 gradually decreases in the direction away from the base 21.

[0042] The connecting plate 3 is provided with a second bolt hole 31 that matches the first bolt hole 12. The connecting plate 3 is used to connect the first rib plate 11 of the pipe ends of two standard steel pipe sections 1 by bolts.

[0043] The bottom sealing key 4 includes a circular base plate 41, an annular rib tube 42, and a second rib plate 43. The diameter of the circular base plate 41 is smaller than the inner diameter of the standard section steel pipe 1. The circular base plate 41 has rib grooves 411 that correspond one-to-one with each of the first rib plates 11. The annular rib tube 42 is coaxially welded to the circular base plate 41. The outer extension of the annular rib tube 42 is located at the root of the rib groove 411. The second rib plate 43 is vertically welded to both sides of each rib groove 411. The second rib plate 43 has a third bolt hole 431 that matches the first bolt hole 12.

[0044] In the assembled state, the pipe ends of multiple standard steel pipe sections 1 are connected by connecting plates 3 and bolts. The narrow end of the cross-shaped key 22 of the plug-in 2 is inserted into the cross-shaped hole 13 from the inside to the outside. The second rib plate 43 of the bottom sealing key 4 is connected to the first rib plate 11 of the standard steel pipe section 1 located at the end by bolts.

[0045] In the above embodiments, by designing a standard steel pipe section 1, a connector with a cross-shaped key 22, a bottom sealing key 4, and a connecting plate 3, and by combining and splicing multiple standard steel pipe sections 1 with specific construction methods, not only is construction convenient and avoids the curing and solidification period of concrete, but the construction period is also greatly shortened, greatly facilitating the emergency repair of the tower foundation. Simultaneously, in this invention's prefabricated hollow steel pipe pile foundation, the foundation excavation is carried out inside the steel pipe, thus achieving safety protection against foundation collapse. Excess soil is then backfilled into the hollow steel pipe, avoiding environmental pollution. Finally, after the prefabricated hollow steel pipe pile foundation is used, the bottom sealing key 4, the cross-shaped key 22, and the standard section connecting plate 3 can be removed from top to bottom, and then the standard steel pipe section 1 can be lifted and excavated, achieving the reuse of the foundation. This invention achieves reusable and prefabricated foundations by adopting a prefabricated excavation and preloading method, avoiding the disadvantages of traditional cast-in-place foundations, such as one-time use and long construction and maintenance cycles. Compared with prefabricated slab foundations, it has better environmental adaptability and a smaller amount of construction earthwork.

[0046] As a preferred embodiment, in the above-mentioned reusable prefabricated hollow steel pipe pile foundation structure for rapid repair towers of transmission lines, the inner wall of the annular rib tube 42 of the bottom sealing key 4 is also provided with a cross shoe plate 44.

[0047] In a preferred embodiment, the reusable prefabricated hollow steel pipe pile foundation structure for the aforementioned rapid repair towers of transmission lines includes a cross-shaped shoe plate 44 with lifting holes 441. The cross-shaped shoe plate 44 not only serves as a reinforcing element for the bottom sealing key 4, but also...

[0048] As a preferred embodiment, in the above-mentioned reusable prefabricated hollow steel pipe pile foundation structure for rapid repair towers of transmission lines, each first rib plate 11 is located on the same plane as the axis of the standard section steel pipe 1.

[0049] The present invention also relates to a construction method for reusable prefabricated hollow steel pipe pile foundations for rapid repair towers of transmission lines. Based on the above-mentioned reusable prefabricated hollow steel pipe pile foundations for rapid repair towers of transmission lines, the construction method includes the following steps:

[0050] The standard section of steel pipe 1 is excavated and pre-pressed for pipe sinking;

[0051] After the standard section of steel pipe 1 is excavated and driven into place, the next standard section of steel pipe 1 is connected on site with bolts through the connecting plate 3;

[0052] After the excavation and sinking of the pipe reaches the designed pile length and forms the pipe pile, the rib groove 411 of the bottom sealing key 4 is matched with the first rib plate 11 of the upper standard section steel pipe 1 from above. Using the first rib plate 11 as a track, the bottom sealing key 4 is hoisted and sunk to the bottom of the pipe pile. The bottom sealing key 4 is locked and fixed by bolts passing through the first bolt hole 12 of the bottom standard section steel pipe 1 and the third bolt hole 431 of the bottom sealing key 4.

[0053] After locking, the pipe pile is further pre-pressurized to improve the tight contact between the pipe pile bottom sealing key 4 and the foundation. The plug-in piece 2 is installed by pressing the cross-shaped plum blossom hole 13 at each standard section of steel pipe 1 through the hydraulic device, so that the cross-shaped plum blossom key 22 passes through the cross-shaped plum blossom hole 13 from the inside to the outside and is pressed to the outside.

[0054] After backfilling and compacting the soil inside the pipe pile, a bottom sealing key 4 is attached to the upper end of the pipe pile and locked in place by bolts passing through the first bolt hole 12 of the top standard section steel pipe 1 and the third bolt hole 431 of the bottom sealing key 4.

[0055] This invention creatively proposes a reusable prefabricated hollow steel pipe pile foundation for transmission line towers requiring rapid repair, and its construction method. It overcomes the shortcomings of traditional cast-in-place foundations in terms of construction period difficulties for rapid repair and the large amount of engineering work required for prefabricated prefabricated foundations, and provides a prefabricated reusable foundation and its construction scheme for transmission line towers requiring rapid repair.

[0056] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A construction method for reusable prefabricated hollow steel pipe pile foundations for rapid repair towers of transmission lines, characterized in that... The basics include: The standard section steel pipe has multiple first ribs welded in a circumferential array on its inner wall, and first bolt holes are provided at both ends of the first ribs; the pipe wall of the standard section steel pipe has through cross-shaped perforations. A connector, comprising a base and a cross-shaped key connected to the base, wherein the cross-shaped key has a cross-shaped cross section that matches the cross-shaped hole, and the width of the cross-shaped key gradually decreases in the direction away from the base. A connecting plate, wherein the connecting plate is provided with a second bolt hole that matches the first bolt hole, and the connecting plate is used to connect the first ribs at the pipe ends of two standard steel pipe sections by bolts; The bottom sealing key includes a circular base plate, an annular rib tube, and a second rib plate. The diameter of the circular base plate is smaller than the inner diameter of the standard section of steel pipe. The circular base plate has rib grooves that correspond one-to-one with each of the first rib plates. The annular rib tube is coaxially welded to the circular base plate. The outer extension of the annular rib tube is located at the root of the rib groove. The second rib plate is vertically welded to both sides of each rib groove. The second rib plate has a third bolt hole that matches the first bolt hole. In the assembled state, the pipe ends of multiple standard steel pipe sections are connected by connecting plates and bolts. The narrow end of the cross-shaped spline key of the plug-in is inserted into the cross-shaped spline hole from the inside to the outside. The second rib of the bottom sealing key is connected to the first rib of the standard steel pipe section located at the end by bolts. The construction method includes the following steps: The standard section of steel pipe is excavated and pre-pressed for pipe sinking; After the standard section of steel pipe is excavated and driven into place, the next standard section of steel pipe is connected on-site with bolts through the connecting plate; After the excavation and sinking of the pipe pipe reaches the designed pile length and forms the pipe pile, the rib groove of the bottom sealing key is matched with the first rib plate of the standard section steel pipe at the top from above. Using the first rib plate as a track, the bottom sealing key is hoisted and sunk to the bottom of the pipe pile. The key is then locked and fixed by bolts passing through the first bolt hole of the standard section steel pipe at the bottom and the third bolt hole of the bottom sealing key. After locking, the pipe pile is further pre-stressed to improve the tight contact between the pipe pile bottom sealing key and the foundation. The plug-in parts are installed by pressing the cross-shaped plum blossom holes of each standard section of steel pipe through a hydraulic device, so that the cross-shaped plum blossom key passes through the cross-shaped plum blossom holes from the inside to the outside. After backfilling and compacting the soil inside the pipe pile, a bottom sealing key is attached to the upper end of the pipe pile, and the pile is locked and fixed by bolts passing through the first bolt hole of the top standard section steel pipe and the third bolt hole of the bottom sealing key.

2. The construction method for reusable prefabricated hollow steel pipe pile foundations of transmission line rapid repair towers according to claim 1, characterized in that, The inner wall of the annular rib tube of the bottom sealing key is also provided with a cross-shaped shoe plate.

3. The construction method for reusable prefabricated hollow steel pipe pile foundations of transmission line rapid repair towers according to claim 2, characterized in that, The cross-shaped boot plate is equipped with lifting holes.

4. The construction method for reusable prefabricated hollow steel pipe pile foundations of transmission line rapid repair towers according to claim 1, characterized in that, Each first rib is located in the same plane as the axis of the standard section of steel pipe.

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