CN114197462B - Tubular pile vibration-resistant connector and tubular pile cage structure - Google Patents
Tubular pile vibration-resistant connector and tubular pile cage structure Download PDFInfo
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- CN114197462B CN114197462B CN202111556265.6A CN202111556265A CN114197462B CN 114197462 B CN114197462 B CN 114197462B CN 202111556265 A CN202111556265 A CN 202111556265A CN 114197462 B CN114197462 B CN 114197462B
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- 238000009434 installation Methods 0.000 claims abstract description 40
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 238000005096 rolling process Methods 0.000 claims description 17
- 239000004567 concrete Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000007704 transition Effects 0.000 description 117
- 230000002787 reinforcement Effects 0.000 description 19
- 230000000712 assembly Effects 0.000 description 10
- 238000000429 assembly Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 7
- 239000000945 filler Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
- E02D27/425—Foundations for poles, masts or chimneys specially adapted for wind motors masts
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
- E02D5/523—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments composed of segments
- E02D5/526—Connection means between pile segments
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to a tubular pile vibration-resistant connector and a tubular pile cage structure, wherein the tubular pile cage structure comprises the tubular pile vibration-resistant connector for connecting adjacent tubular piles. The pipe pile vibration-resistant connector comprises a connecting unit and an expansion unit, wherein the connecting unit comprises a connecting cylinder and elastic elements, the elastic elements are arranged at the opposite ends of the connecting cylinder in the axial direction and are connected with the pipe pile, so that the pipe pile is converted into a rigid and elastic connecting mode by rigid connection, and the high-frequency vibration of the upper fan transmitted downwards during working can be effectively slowed down. The connecting cylinder and the elastic element jointly form a first installation position and a second installation position, the expansion unit is installed in the first installation position and the second installation position, and the opposite ends of the expansion unit in the axial direction respectively protrude out of the first installation position and are accommodated in the second installation position; the expansion units are accommodated at the two opposite ends of the second installation position, and the size of the expansion units in the radial direction is variable, so that the expansion units can be inserted into the tubular piles more tightly, and the horizontal load and shearing resistance of the connecting positions between the tubular piles are improved.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a pipe pile vibration-resistant connector and a pipe pile cage structure.
Background
With the rapid increase of the installed capacity of wind power in China, the trend of large-scale fans is accelerated, and the safety of fan foundations, the manufacturing cost of wind power plant construction and the wind power plant construction period in the wind power plant construction process directly influence the economy of the wind power plant.
At present, a tower structure of a wind generating set in China mainly adopts a prefabricated steel cylinder tower structure. When the height of the tower structure reaches more than 90 meters, the rigidity of the steel cylinder is correspondingly reduced along with the increase of the diameter of the wind wheel and the height of the hub, and the steel cylinder is easy to resonate with the fan impeller due to the smaller rigidity of the pure steel cylinder, so that the cross section size is required to be increased to meet the technical requirements, but the diameter and the wall thickness of the tower cylinder are constrained by various factors, so that the healthy development of a wind power plant is severely restricted by the traditional fan tower cylinder structure.
In recent years, a new prestressed concrete composite tower begins to appear, and the concrete composite tower has high structural rigidity and high damping ratio, and can effectively avoid resonance between the tower body and the machine head. Therefore, some fan tower cylinders with the height of more than 90m adopt concrete, pure steel cylinders and pure precast concrete cylinder structures. However, the structural form still has the defect of poor structural reliability, so that the adoption of a novel rigid fan tower to replace the traditional fan steel tower is a necessary trend of development of the wind power industry. However, the existing reinforced concrete pipe piles do not have an anti-vibration function, the pipe piles cannot have the anti-vibration function, the connection between the pipe piles is absolute rigid connection, the high-frequency vibration of a fan cannot be tolerated for a long time obviously, the existing pipe piles are inconvenient to assemble, the structural strength of the connection part is not high, and therefore, the stability of the connection part between the pipe piles is very important.
Disclosure of Invention
Based on this, it is necessary to provide a tubular pile anti-vibration connector with anti-vibration function and convenient for connecting the tubular pile and a tubular pile cage structure comprising the tubular pile anti-vibration connector to realize a more effective prestress tubular pile connection mode, thereby further improving the stability of the rigid fan tower structure, aiming at the defects that the tubular pile connection of the existing fan tower structure is absolute rigid connection, high-frequency vibration of a fan cannot be effectively resisted, the connection part strength is not high, and the like.
According to one aspect of the present application, there is provided a pipe pile vibration-resistant connector, comprising:
the connecting unit comprises a connecting cylinder and two elastic elements, wherein the connecting cylinder is provided with first installation positions communicated with opposite ends of the connecting cylinder in the axial direction, the two elastic elements are respectively installed at opposite ends of the connecting cylinder in the axial direction, and each elastic element forms a second installation position communicated with the first installation position; and
the expansion units are arranged in the first installation position and the second installation position, and the opposite ends of the expansion units along the axial direction of the connecting cylinder respectively protrude out of the first installation position and are accommodated in the second installation position;
wherein the expansion unit is accommodated at the opposite ends of the second mounting position and has a variable dimension in the radial direction of the connecting cylinder.
In one embodiment, the elastic element circumferentially surrounds the connecting cylinder.
In one embodiment, each elastic element includes a buffer portion connected to the connecting cylinder and circumferentially surrounding the first mounting position, and an extension portion extending from the buffer portion toward an inner peripheral edge of the first mounting position in an axial direction of the buffer portion in a direction away from the buffer portion.
In one embodiment, the expansion unit comprises an expansion element and a control assembly, the expansion element is fixedly connected to the side wall of the first installation position, two opposite ends of the expansion element in the axial direction of the connecting cylinder protrude out of the first installation position and are accommodated in the second installation position, the control assembly penetrates through the expansion element, and the control assembly can move relative to the expansion element in the axial direction of the connecting cylinder so as to increase the outer diameter of the two opposite ends of the expansion element accommodated in the second installation position.
In one embodiment, the control assembly comprises two control elements and a connecting piece, wherein the two control elements are symmetrically arranged along the axial direction of the expansion element at intervals, the connecting piece is used for connecting the two control elements, and the connecting piece can control the two control elements to be close to each other along the axial direction of the connecting cylinder.
In one embodiment, each control element comprises a connecting part and a moving part, one end of the moving part is fixedly connected with the connecting part, the moving part comprises a connecting shaft and a plurality of rolling bodies fixedly connected with the connecting shaft and distributed at intervals along the axial direction of the connecting shaft, and the outer diameter of each rolling body is larger than that of the connecting shaft.
In one embodiment, the expansion element is provided with a first limiting hole communicated with two opposite ends of the expansion element in the radial direction and a second limiting hole communicated with two opposite ends of the expansion element in the axial direction, and the first limiting hole and the second limiting hole are mutually communicated.
In one embodiment, the connecting portion is disposed through the first limiting hole, and the moving portion is limited in the second limiting hole.
In one embodiment, the second limiting hole comprises a straight line section and a plurality of spherical sections which are arranged at intervals along the axial direction of the straight line section, the diameter of each spherical section is larger than that of the straight line section, and each rolling body is limited in one spherical section;
when the two control elements are close to each other in the axial direction of the expansion element, the rolling bodies move into the straight line segment to increase the diameter of the straight line segment, thereby increasing the outer diameters of the opposite ends of the expansion element accommodated in the second installation position.
According to another aspect of the present application, there is provided a tubular pile cage structure comprising a plurality of tubular piles connected end to end and the above-mentioned tubular pile anti-vibration connector, wherein the tubular pile anti-vibration connector is used for connecting two adjacent tubular piles.
Above-mentioned tubular pile anti vibration connector and tubular pile cage structure through set up tubular pile anti vibration connector connection adjacent tubular pile in tubular pile cage structure to set up connecting unit in tubular pile anti vibration connector, set up the elastic element that has elasticity at connecting unit, make the tubular pile change into rigidity by complete rigid connection and add elastic connected mode, can effectively slow down the high frequency vibration of upper portion fan at the during operation downward transmission, can further increase the overall stability of rigidity fan pylon. Simultaneously set up the expansion unit in the tubular pile anti vibration connector, set up the first installation position and the second installation position at the relative both ends of intercommunication connecting unit in the connecting unit, the expansion unit is installed in first installation position and second installation position, its relative both ends protrusion in first installation position, the part that the expansion unit protrusion in first installation position is used for inserting and locates inside the tubular pile, its radial dimension can controllably increase to insert more firmly in locating the tubular pile, thereby can improve the horizontal load of junction between the tubular pile and anti shearing ability.
Drawings
Fig. 1 is a front view of a tubular pile cage structure according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is an enlarged view of region B of FIG. 1;
FIG. 4 is an enlarged view of region C of FIG. 3;
fig. 5 is a front view of a connection unit of a pipe pile anti-vibration connector according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken in the direction D-D of FIG. 3;
fig. 7 is a schematic view of an expansion unit of a pipe pile anti-vibration connector according to an embodiment of the present invention;
FIG. 8 is an enlarged view of area E of FIG. 7;
FIG. 9 is an enlarged view of area F of FIG. 1;
FIG. 10 is a schematic view of a reinforcement unit according to a first embodiment of the present invention;
fig. 11 is a schematic view of a reinforcement unit according to a second embodiment of the present invention.
Wherein: 10. a tubular pile cage structure; 100. a base section; 110. a base support unit; 111. a main first pipe pile; 112. an auxiliary first pipe pile; 200. a first transition section; 210. a transition unit; 211. a main first transition pipe; 212. a secondary first transition duct; 300. a support section; 310. a tubular pile assembly; 320. a second pipe pile; 321. a first flange; 330. a pipe pile vibration-resistant connector; 331. a connection unit; 3311. a connecting cylinder; 3311a, body; 3311b, a second flange; 3311c, reinforcing bars; 3311d, first mount location; 3312. an elastic element; 3312a, a buffer; 3312b, extension; 3312c, a second mounting location; 332. an expansion unit; 3321. an expansion element; 3321a, a sub-expansion element; 3321b, first spacing holes; 3321c, second spacing holes; 3321d, straight line segment; 3321e, spherical segment; 3322. a control assembly; 3322a, control element; 3322b, connectors; 3322c, connection part; 3322d, moving part; 3322e, connecting shaft; 3322f, rolling elements; 333. a fixing bolt; 350. a high-strength bolt; 400. a second transition section; 410. a second transition tube; 411. triangular reinforcing ribs; 500. a transition connector; 510. a transition piece; 520. a filler; 600. a reinforcement unit; 610. a hoop; 611. an annular flange; 620. a connecting ring; 630. a connecting plate; 20. a supported structure.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
An embodiment of the present invention provides a tubular pile cage structure having a certain height, which is a high-rise cage structure formed by combining a plurality of tubular piles, and is used for supporting a supported structure.
The structure of the tubular pile cage structure and the tubular pile vibration-resistant connector in the tubular pile cage structure in the application is explained below by taking the tubular pile cage structure for supporting the fan tower barrel as an example, and the tubular pile cage structure can support the fan tower barrel and can provide effective and stable support for the fan tower barrel and other supported structures. The present embodiment is only used as an example and does not limit the technical scope of the present application. It will be appreciated that in other embodiments, the tube stake cage structure may also be used to support other supported structures, and is not limited in this regard.
As shown in fig. 1, a tubular pile cage structure 10 includes a base section 100, a first transition section 200, a support section 300, a second transition section 400, a plurality of transition connectors 500, and a plurality of reinforcement units 600. The foundation section 100, the first transition section 200, the support section 300 and the second transition section 400 are connected end to end in sequence along the first direction, the foundation section 100 is located at the bottommost end in the tubular pile cage structure 10 and is used for providing foundation support for the whole tubular pile cage structure 10, the bottom end of the foundation section 100 can be connected with the ground, a tubular pile located at the lower part in the tower structure can also be connected, the support section 300 is located above the foundation section 100, the support section 300 is connected with the foundation section 100 through the first transition section 200, the supported structure 20 is located above the support section 300, and the support section 300 is connected with the supported structure 20 through the second transition section 400. The plurality of transition connectors 500 are respectively used for connecting the foundation section 100 and the first transition section 200, connecting the first transition section 200 and the supporting section 300, and connecting the supporting section 300 and the second transition section 400, and the plurality of reinforcing units 600 are installed in the foundation section 100 and the supporting section 300 along the first direction so as to further strengthen the tubular pile cage structure 10. The X direction in the figure is the first direction.
Specifically, in some embodiments, the foundation section 100 includes a plurality of foundation support units 110, and in a preferred embodiment, the number of foundation support units 110 is eight, and the eight foundation support units 110 are arranged at intervals around a first axis extending along a first direction, each foundation support unit 110 includes a fixed end and a connection end that are oppositely disposed along the first direction, and in a direction from the fixed end to the connection end, a distance between two adjacent foundation support units 110 gradually decreases.
In some embodiments, each of the base support units 110 includes a plurality of first tubular piles, and in a preferred embodiment, the number of first tubular piles in each of the base support units 110 is three, the three first tubular piles in each of the base support units 110 are arranged around a second axis extending along a first direction, the plurality of second axes are arranged around the first axis at intervals, the distance between two adjacent first tubular piles in the base support units 110 is gradually reduced in a direction from the fixed end to the connecting end, and the three first tubular piles of the base support units 110 are one main first tubular pile 111 and two sub first tubular piles 112 respectively, wherein the main first tubular pile 111 is located inside the tubular pile cage structure 10, and the inclination angle of the main first tubular pile 111 is smaller than that of the two sub first tubular piles 112. In this way, each base support unit 110 is in a tapered configuration, and a plurality of base support units 110 in a tapered configuration are combined together, such that the base section 100 is also in a tapered configuration.
In some embodiments, the first transition section 200 includes a plurality of transition units 210, corresponding to the number of base support units 110 in the base section 100, the number of transition units 210 being eight. Eight transition units 210 are spaced about the first axis. Corresponding to the number of the pipe piles in each base supporting unit 110, each transition unit 210 includes three first transition pipes, the three first transition pipes in the transition unit 210 are arranged around a third axis extending along the first direction, the third axes are arranged around the first axis at intervals, and a circular ring formed by connecting lines of the third axes has a diameter smaller than a circular ring straight line formed by connecting lines of the second axes. Corresponding to the base support units 110 in the base section 100, the distance between two adjacent transition units 210 gradually decreases in the direction from the fixed end to the connection end, and the distance between two adjacent first transition pipes in each transition unit 210 also gradually decreases, so that the extension lines of the three first transition pipes can intersect at the same point. In this manner, each transition cell 210 is tapered, and a plurality of tapered transition cells 210 are surrounded together along the first axis such that the first transition section 200 is also tapered.
In a preferred embodiment, as shown in fig. 1 and 2, corresponding to the three first piles of the foundation support unit 110 in the foundation section 100, the three first transition pipes in the transition unit 210 are one main first transition pipe 211 and two auxiliary first transition pipes 212, respectively, wherein the main first transition pipe 211 is located inside the pile cage structure 10, the inclination angle of the main first transition pipe 211 is equal to the inclination angle of the main first pile 111 in the foundation support unit 110, and the inclination angle of the auxiliary first transition pipe 212 is equal to the inclination angle of the auxiliary first pile 112 in the foundation support unit 110. Thus, the inclination angle of the main first transition pipe 211 is also smaller than the inclination angle of the two sub first transition pipes 212. One end of the main first transition pipe 211 is connected to one end of the main first pipe pile 111 located at the connection end in the foundation supporting unit 110 through a transition connector 500, and the other end of the main first transition pipe 211 is connected to the supporting section 300 through the transition connector 500. One ends of the two sub first transition pipes 212 are also connected to one end of the sub first pipe pile 112 located at the connection end of one base support unit 110 through the transition joint 500, respectively, and the other ends of the two sub first transition pipes 212 are beveled to form a portion so that the ends can be attached to and welded to the outer circumferential surface of the main first transition pipe 211.
In some embodiments, the support section 300 includes a plurality of sets of tubular pile assemblies 310, corresponding to the number of the base support units 110 and the transition units 210 of the transition section of the base section 100, the number of tubular pile assemblies 310 is eight, the eight sets of tubular pile assemblies 310 are distributed at intervals around the first axis, one end of each set of tubular pile assemblies 310 is connected to the main first transition pipe 211 of one transition unit 210 in the first transition section 200 through a transition connector, and the other end of each set of tubular pile assemblies 310 is connected to the second transition section 400 through a transition connector 500.
In a preferred embodiment, each set of the pipe pile assemblies 310 includes a plurality of second pipe piles 320 connected end to end, the distance between two adjacent second pipe piles 320 is gradually reduced from the fixed end to the direction of the connecting end, and the inclination angle of each second pipe pile 320 is the same as the inclination angle of the main first pipe pile 111 in the base support unit 110 and the main first transition pipe 211 in the transition unit 210, so that the support section 300 has a tapered structure with a slight inclination angle. The structure of the single second pipe pile 320 of the support section 300 is the same as that of the single first pipe pile of the base section 100, and each second pipe pile 320 has first flanges 321 at opposite ends thereof for connection with the adjacent second pipe piles 320.
Thus, through above installation and connected form for supporting section 300 is piled up the concatenation by a plurality of conical sub-supporting sections end to end in proper order and forms, and supporting section 300 is divided into the multilayer, and every layer is a sub-supporting section, and every layer sub-supporting section is enclosed by eight second tubular pile 320 around the first axis and closes and form.
The inventor finds that the existing reinforced concrete pipe piles do not have an anti-vibration function, the pipe piles cannot have the anti-vibration function, the connection between the pipe piles is absolute rigid connection, the high-frequency vibration of a fan cannot be tolerated for a long time obviously, the existing pipe piles are inconvenient to assemble, and the structural strength of the connection part is not high.
To solve this problem, a tube pile vibration-resistant connector 330 may be added between the adjacent second tube piles 320, and in particular, it is considered that the tube pile vibration-resistant connector 330 has elasticity, and the tube pile vibration-resistant connector 330 may be designed to be expandable.
Specifically, as shown in fig. 3 to 5, in some embodiments, the pipe pile anti-vibration connector 330 includes a connection unit 331 and an expansion unit 332, the connection unit 331 includes a connection barrel 3311 and two elastic members 3312, the connection barrel 3311 has first mounting positions 3311d communicating opposite ends of the connection barrel 3311 in an axial direction thereof, the two elastic members 3312 are respectively mounted at opposite ends of the connection barrel 3311 in the axial direction, and each elastic member 3312 forms a second mounting position 3312c communicating with the first mounting position 3311 d; the expansion unit 332 is mounted in the first mounting position 3311d and the second mounting position 3312c, opposite ends of the expansion unit 332 in the axial direction of the connection barrel 3311 protrude from the first mounting position 3311d and are received in the second mounting position 3312c, respectively, and the dimensions of the opposite ends of the expansion unit 332 received in the second mounting position 3312c in the radial direction of the connection barrel 3311 are variable, so that the expansion unit 332 can be more securely inserted into the second pipe pile 320.
When the pipe pile anti-vibration connector 330 is connected with the second pipe pile 320, the elastic element 3312 is located between the connecting barrel 3311 and the second pipe pile 320, so that the pipe pile anti-vibration connector 330 and the second pipe pile 320 have elasticity, and a part of high-frequency vibration transmitted downwards by the fan at the upper part of the pipe pile cage structure 10 during operation can be counteracted.
In some embodiments, as shown in fig. 4 and 5, the connecting barrel 3311 includes a body 3311a, a second flange 3311b and a reinforcing rib 3311c, the body 3311a is preferably a cylindrical structure, the second flange 3311b has two, preferably circular discs, and is fixedly connected to opposite ends of the body 3311a along the axial direction, each second flange 3311b has a size corresponding to that of the first flange 321 at the end of the second pipe pile 320 for connection with the second pipe pile 320, and the outer diameter of the second flange 3311b is larger than the outer diameter of the outer peripheral surface of the body 3311 a. The reinforcing ribs 3311c are arranged at intervals around the axial direction of the body 3311a and fixedly connected to the outer circumferential surface of the body 3311a, and opposite ends of the reinforcing ribs 3311c along the axial direction of the body 3311a are fixedly connected to one sides of the two second flanges 3311b, which are far from the second pipe piles 320, respectively, for reinforcing the strength of the pipe pile anti-vibration connectors 330. The connecting barrel 3311 is further provided with first mounting locations 3311d communicating opposite ends in the axial direction, so that one side of one second flange 3311b close to the second pipe pile 320 and one side of the other second flange 3311b close to the second pipe pile 320 are mutually communicated.
In some embodiments, the elastic element 3312 is preferably made of a silicone rubber material, and includes a buffering portion 3312a and an extension portion 3312b, the buffering portion 3312a is in a ring structure, the outer diameter of the buffering portion 3312a matches with the outer diameters of the first flange 321 and the second flange 3311b, one side of the buffering portion 3312a along the axial direction is attached to one side of the second flange 3311b in the connecting cylinder 3311, and one side of the buffering portion 3312a away from the connecting cylinder 3311 is connected with the second pipe pile 320. The extension portion 3312b is preferably formed in an annular cylindrical structure having a certain length, and extends from the buffer portion 3312a toward the inner peripheral edge of the first mounting portion 3311d in the axial direction of the buffer portion 3312a in a direction away from the buffer portion 3312 a. Thus, the outer diameter of the extension portion 3312b is smaller than the outer diameter of the buffering portion 3312a, and the elastic member 3312 has the second mounting position 3312c communicating the extension portion 3312b and the buffering portion 3312a, so that the elastic member 3312 has an integral structure of a torus and a cylinder having a certain thickness.
It should be noted that the connecting tube 3311 may be formed by welding the body 3311a and the second flange 3311b and by welding the body 3311a and the reinforcing ribs 3311c, or may be formed by integrally casting with a mold, and through heat treatment, holes are uniformly formed in the second flange 3311b, and are connected with the elastic member 3312 together with the second pipe pile 320 by the high strength bolts 350.
In some embodiments, as shown in fig. 3, 6, and 7, the expansion unit 332 includes an expansion element 3321 and a control assembly 3322, the control assembly 3322 being mounted within the expansion element 3321. The expansion element 3321 is preferably a cylindrical concrete segment, which is inserted into the installation position of the connection unit 331, and the middle part of the outer circumferential surface of the expansion element 3321 is fixedly installed on the inner side wall of the body 3311a in the connection cylinder 3311 by the fixing bolt 333. Thus, the two opposite ends of the expansion unit 332 along the axial direction protrude from the connecting barrel 3311, wherein the middle portion of the expansion element 3321 is inserted into the first mounting position 3311d of the connecting barrel 3311, the two ends of the expansion unit 332 protruding from the first mounting position 3311d are respectively received in the second mounting positions 3312c of the two elastic elements 3312, such that the expansion unit 332 is integrally received in the first mounting position 3311d and the second mounting position 3312c, and the portion of the expansion unit 332 protruding from the first mounting position 3311d and received in the second mounting position 3312c and the extension portion 3312b of the elastic element 3312 are jointly inserted into the second tubular pile 320.
In some embodiments, as shown in fig. 7 and 8, the expansion element 3321 includes two semi-cylindrical sub-expansion elements 3321a, each of the two sub-expansion elements 3321a being semi-cylindrical and spliced together to form the expansion element 3321. The expansion element 3321 is provided with a first limiting hole 3321b and a second limiting hole 3321c for accommodating the control assembly 3322, wherein the second limiting hole 3321c is formed in one of the sub-expansion elements 3321a, the first limiting hole 3321b and the second limiting hole 3321c are mutually communicated, and half of each of the first limiting hole 3321b and the second limiting hole 3321c is respectively formed in one of the sub-expansion elements 3321 a. In this way, the first limiting hole 3321b is located at the middle part of the expansion element 3321 and is communicated with the outer circumferential surface of the expansion element 3321 along the radial direction of the expansion element 3321, and the second limiting hole 3321c is located at the middle part of the expansion element 3321 and is communicated with the opposite ends of the expansion element 3321 along the axial direction of the expansion element 3321.
In some embodiments, as shown in fig. 7, the control assembly 3322 includes two control elements 3322a and a connecting piece 3322b, the control elements 3322a are preferably symmetrically and alternately arranged along the axial direction of the expansion element 3321, the connecting piece 3322b is used for connecting the two control elements 3322a and controlling the two control elements 3322a to be close to each other along the axial direction of the expansion element 3321 so that the outer diameters of the expansion element 3321 protruding from the first mounting position 3311d and accommodated at the opposite ends of the second mounting position 3312c can be slightly expanded.
Each control element 3322a comprises a connecting part 3322c and a moving part 3322d, one end of the moving part 3322d is fixedly connected with the connecting part 3322c, the moving part 3322d comprises a connecting shaft 3322e and a plurality of rolling bodies 3322f which are arranged on the connecting shaft 3322e at intervals along the axial direction of the connecting shaft 3322e, and the rolling bodies 3322f can not move along the axial direction of the connecting shaft 3322 e. In a preferred embodiment, the outer diameter of the rolling element 3322f is larger than the outer diameter of the connecting shaft 3322 e.
The connecting portion 3322c is disposed in the first limiting hole 3321b, and opposite ends of the connecting portion 3322c are exposed out of the expansion element 3321, and the moving portion 3322d is disposed in the second limiting hole 3321 c. Corresponding to the shape of the moving portion 3322d, the second limiting hole 3321c includes a plurality of straight line segments 3321d arranged at intervals and a plurality of spherical segments 3321e arranged at intervals along the axial direction of the straight line segments 3321d, each spherical segment 3321e is located between two straight line segments 3321d, the number of spherical segments 3321e corresponds to the number of rolling bodies 3322f, the diameter of the spherical segment 3321e is larger than that of the straight line segments 3321d, the connecting shaft 3322e is limited in all the straight line segments 3321d, each rolling body 3322f is limited in one spherical segment 3321e, and the diameter of the straight line segment 3321d is smaller than the outer diameter of the rolling body 3322 f. The connecting members 3322b are preferably two bolts respectively mounted on the two connecting portions 3322c exposed at opposite ends of the expansion element 3321.
With continued reference to fig. 7 to 8, when the pipe pile anti-vibration connector 330 is mounted between two adjacent second pipe piles 320, the connection piece 3322b is screwed, the two control elements 3322a can be mutually close along the axial direction of the expansion element 3321, at this time, the rolling elements 3322f can be separated from the spherical section 3321e into the straight section 3321d, and the diameter of the straight section 3321d is increased, so that the outer diameter of the portion of the expansion element 3321 protruding from the first mounting position 3311d is increased, and the opposite ends of the expansion element 3321 protruding from the first mounting position 3311d and the extension portions 3312b of the elastic elements 3312 are abutted against the inner wall of the second pipe piles 320, so that the connection between the pipe pile anti-vibration connector 330 and the second pipe piles 320 can be elastic, and the horizontal load resistance and shearing resistance of the connection portion 3322c of the adjacent second pipe piles 320 can be enhanced.
With continued reference to fig. 1, in some embodiments, the second transition section 400 includes a plurality of second transition pipes 410, the plurality of second transition pipes 410 are arranged at intervals around the first axial direction, one end of each second transition pipe 410 is correspondingly connected to one end of the set of pipe pile assemblies 310 away from the first transition section 200, and the other end of each second transition pipe 410 is connected to the supported structure 20. Each second transition piece 410 of the second transition piece 400 has a flange at an end remote from the supported structure 20 for connection with the transition joint 500. In the direction from the fixed end to the connection end, the distance between two adjacent second transition pipes 410 is gradually reduced, and the inclination angle of each second transition pipe 410 is the same as the inclination angle of each group of pipe pile assemblies 310 in the supporting section 300, so that the supporting section 300 also has a cone-shaped structure with a tiny inclination angle. When the supported structure 20 is a fan tower, one end of each second transition pipe 410 connected with the supported structure 20 is cut out by grooving, so that one transition pipe can be attached to the outer wall and the inner wall of the supported structure 20. In this manner, the plurality of transition tubes are circumferentially surrounding the supported structure 20 along the circumference of the supported structure 20, and one end of each transition tube is fixed to the outer wall of the supported structure 20.
In some embodiments, as shown in fig. 4, the diameters of the main first transition pipe 211 in the first transition section 200 and the second transition pipe 410 in the second transition section 400 are smaller than the diameters of the main first pipe pile 111 in the base section 100 and the second pipe pile 320 in the support section 300, two opposite ends of each second transition pipe 410 are provided with a plurality of triangular reinforcing ribs 411 and flanges, the triangular reinforcing ribs 411 are arranged at intervals along the circumferential direction of the second transition pipe 410, one right-angled side of each triangular reinforcing rib 411 is welded to the outer circumferential surface of the second transition pipe 410, and the other right-angled side is welded to one side of the flange of the second transition pipe 410 away from the second pipe pile 320. Each of the second pipe piles 320 and each of the second transition pipes 410 has a central hole communicating opposite ends, and the cross section thereof is circular.
In some embodiments, as shown in fig. 9, the structure of the transition joint 500 is similar to that of the pipe pile anti-vibration joint 330, the transition joint 500 includes a transition piece 510 and a filling piece 520, the structure of the transition piece 510 is similar to that of the connecting barrel 3311 in fig. 5, flanges at opposite ends of the transition piece 510 may be connected to flanges at ends of the second pipe pile 320 and the second transition pipe 410 respectively by bolts, or may be directly welded at one end of the second transition pipe 410. The filler element 520 is preferably a solid cylindrical section of concrete, and when the transition joint 500 connects the base section 100 to the first transition section 200, the filler element 520 may be in an expandable or unexpanded configuration as the expansion element 3321 of the expansion unit 332 of fig. 1 and 3; the filler 520 is an expandable structure when the transition joint 500 connects the support section 300 with the second transition section 400. The packing 520 is mounted in the transition piece 510 by screws, and opposite ends of the packing 520 are inserted into the center holes of one second pipe pile 320 and one second transition pipe 410, respectively. In this way, the connection between the base section 100 and the first transition section 200, the first transition section 200 and the support section 300, and the support section 300 and the second transition section 400 is achieved.
Similarly, in a preferred embodiment, a resilient siliconized rubber material is also installed between the transition joint 500 and the second tube stake 320 and between the transition joint 500 and the second tube stake 410, which is the same as the resilient element 3312 between the tube stake vibration-resistant joint 330 and the second tube stake 320.
With continued reference to fig. 1, in some embodiments, a plurality of reinforcement units 600 are spaced apart along the first direction, and a plurality of reinforcement units 600 may be installed in the base section 100 or in the support section 300, each reinforcement unit 600 being simultaneously connected to eight primary first tube piles 111 in the base section 100 when installed in the base section 100, and each reinforcement unit 600 being simultaneously connected to eight sets of tube pile assemblies 310 of the connection section when installed in the support section 300.
In some embodiments, as shown in fig. 10 and 11, each reinforcing unit 600 includes a plurality of hoops 610, a connecting ring 620 and a plurality of connecting plates 630, the hoops 610 are arranged at intervals along the circumference of the connecting ring 620, each hoop 610 is connected to the outer circumferential surface of the connecting ring 620 through the connecting plates 630, and each hoop 610 is sleeved on the outer circumferential surface of one second pipe pile 320.
As shown in fig. 10, which is a first embodiment of the reinforcement unit 600, in this embodiment, the connection ring 620 has a cylindrical ring structure, the anchor ear 610 includes two semicircular ring flanges 611, the two ring flanges 611 are connected by bolts, opposite ends of one ring flange 611 in each anchor ear 610 in the radial direction are respectively connected to the outer circumferential surface of the connection ring 620 by one connection plate 630, and opposite ends of each connection plate 630 are preferably respectively connected to the outer circumferential surface of the connection ring 620 and one end of one ring flange 611 in the radial direction by welding.
As shown in fig. 11, in the second embodiment of the reinforcement unit 600, the connection ring 620 has an octagonal ring structure, the structure of the anchor ear 610 is the same as that of the anchor ear 610 in the reinforcement unit 600 of the first embodiment, one of the annular flanges 611 in each anchor ear 610 is connected to one of the faces of the octagonal connection ring 620 through two connection plates 630, and the two connection plates 630 for connecting each annular flange 611 to one face of the octagonal connection ring 620 are joined to one face of the octagonal connection ring 620 to form a triangle, and opposite ends of each connection plate 630 are preferably connected to one face of the octagonal connection ring 620 and the outer circumferential surface of one annular flange 611, respectively, by welding, so that the shape of the cross section of the single reinforcement unit 600 in the axial direction is in the shape of an octagon.
The reinforcement unit 600 of the above two embodiments has stronger strength, can bear larger load, and can perform further reinforcement function on the tubular pile cage structure 10.
It should be noted that, the number of the foundation supporting units 110 of the foundation section 100, the number of the transition units 210 of the first transition section 200, the number of the second tubular piles 320 of the supporting section 300 and the number of the second transition pipes 410 of the second transition section 400 in the above-mentioned tubular pile cage structure 10 are not limited to eight, and the number of the primary first tubular piles 111 and the secondary first tubular piles 112 in each foundation supporting unit 110 and the number of the primary first transition pipes 211 and the secondary first transition pipes 212 in each transition unit 210 of the first transition section 200 in the foundation section 100 are not limited to three, and can be adjusted as required.
For the convenience of understanding the present invention, the specific construction steps of the tubular pile cage structure 10 when installed are as follows:
step 1: all components of the foundation section 100, the first transition section 200, the support section 300, the second transition section 400, the transition joint 500 and the reinforcement unit 600 are prefabricated according to the drawing by a factory;
step 2: the construction of the foundation bearing platform reaches the standard of installing the upper structure;
step 3: installing the reinforcement units 600 in the foundation section 100 by means of a movable construction platform, such that the reinforcement units 600 fix the respective main first pipe piles 111 in the foundation section 100;
step 4: after the foundation section 100 is installed, the first layer of sub-support sections are connected with the foundation section 100 by utilizing the first transition section 200 and the transition connector 500;
step 5: the second pipe piles 320 of one layer of sub-supporting sections are then fixed by the reinforcement unit 600 by means of the movable construction platform,
step 6: the steps of connecting the second pipe piles 320 through the pipe pile vibration-resistant connectors 330 are specifically as follows:
1) Assembling the connecting cylinder 3311 and the expansion element 3321 on the ground, installing the expansion element 3321 in the installation position of the connecting cylinder 3311 by using the fixing bolts 333, and then sleeving the elastic elements 3312 on the opposite ends of the expansion element 3321 protruding from the first installation position 3311 d;
2) Placing the structure of 1) between two adjacent second tubular piles 320, inserting the expansion element 3321 into the second tubular piles 320 together with the extension parts 3312b of the elastic elements 3312 and the opposite ends protruding from the first installation position 3311d, and connecting the connecting barrel 3311 with the second tubular piles 320 up and down by the high strength bolts 350;
3) Tightening the connector 3322b of the control assembly 3322 to make two control elements 3322a of the control assembly 3322 approach each other along the axial direction of the expansion element 3321, separating the rolling bodies 3322f of the moving part 3322d of the control element 3322a from the spherical section 3321e into the linear section 3321d, and expanding the diameter of the linear section 3321d so that the opposite ends of the expansion element 3321 protruding out of the first mounting position 3311d slightly expand outwards along the radial direction to be tightly connected with the second tubular pile 320, and keeping the elastic element 3312 in a pressed state;
4) Then, other second tubular piles 320 are connected according to the same steps, so that the connectors of the second tubular piles 320 are connected with two adjacent second tubular piles 320 in each group of second tubular pile 320 assemblies 310;
the installation of the multi-layer sub-support sections 300 of the second layer, the third layer, etc. is completed upwards in sequence through the second pipe pile 320 connector and the reinforcement unit 600, thereby completing the installation of the entire support section 300;
step 6: after the support section 300 is installed, the second transition section 400 is used to connect the upper fan tower or other supported structures 20, and finally the tubular pile cage structure 10 provided by the invention is formed.
The tubular pile cage structure 10 provided by the invention is integrally in a conical cage structure and has similar mechanical properties with a cylindrical structure, compared with a steel tower, the foundation section 100 at the bottom of the conical tubular pile cage structure 10 occupies a larger area due to larger taper, the capability of resisting water load and shearing can be improved, the defect of poor rigidity of the steel cylinder of the traditional fan is overcome, and the tubular pile cage structure can be used for replacing the steel tower structure of the traditional fan. Meanwhile, the pipe pile vibration-resistant connector 330 with the vibration reduction function is adopted between the second pipe piles 320, so that high-frequency vibration transmitted downwards by the normal operation of the upper fan can be effectively slowed down, and the integrity and stability of the upper fan are further improved. Further, the main structure of the tubular pile cage structure 10 is prefabricated in a factory, and the tubular pile cage structure is assembled on site without considering maintenance time and period, so that the tubular pile cage structure is convenient to construct, economical in manufacturing cost and high in safety, and has less influence on adjacent buildings during construction.
Meanwhile, after the pipe pile anti-vibration connector 330 provided by the invention is used, the connection mode between the upper and lower adjacent second pipe piles 320 is converted from a completely rigid connection mode to a rigid and elastic connection mode, so that high-frequency vibration transmitted downwards by a fan above a tower structure during operation can be partially counteracted under the action of the elastic element 3312, and the overall stability of the fan tower can be further increased. Meanwhile, the expandable expansion element 3321 is arranged on the pipe pile anti-vibration connector 330, so that the expansion element 3321 can be tightly connected with the second pipe piles 320 in an expansion mode, and the horizontal load resistance and the shearing resistance of the connection part between the second pipe piles 320 can be improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A tubular pile anti-vibration connector, comprising:
the connecting unit comprises a connecting cylinder and two elastic elements, wherein the connecting cylinder is provided with first mounting positions communicated with two opposite ends of the connecting cylinder in the axial direction, the two elastic elements are respectively mounted at two opposite ends of the connecting cylinder in the axial direction and encircle the connecting cylinder along the circumferential direction of the connecting cylinder, each elastic element forms a second mounting position communicated with the first mounting position, and comprises a buffer part and an extension part, the buffer part is connected with the connecting cylinder and circumferentially surrounds the first mounting position, and the extension part extends from the buffer part towards the inner periphery of the first mounting position along the axial direction of the buffer part towards the direction far away from the buffer part; and
the expansion units are arranged in the first installation position and the second installation position, and the opposite ends of the expansion units along the axial direction of the connecting cylinder respectively protrude out of the first installation position and are accommodated in the second installation position;
the expansion unit comprises an expansion element and a control assembly penetrating through the expansion element, the expansion element is a cylindrical concrete section fixedly connected to the side wall of the first installation position, two opposite ends of the expansion element along the axial direction of the connecting cylinder protrude out of the first installation position and are contained in the second installation position, the control assembly comprises two control elements and a connecting piece, the two control elements are symmetrically arranged along the axial direction of the expansion element at intervals, the connecting piece is used for connecting the two control elements, and the two control elements can be controlled to be mutually close along the axial direction of the connecting cylinder; each control element comprises a connecting part and a moving part, one end of the moving part is fixedly connected with the connecting part, the moving part comprises a connecting shaft and a plurality of rolling bodies fixedly connected with the connecting shaft and distributed at intervals along the axial direction of the connecting shaft, and the outer diameter of each rolling body is larger than that of the connecting shaft;
the expansion element is provided with a first limiting hole communicated with two opposite ends of the expansion element in the radial direction and a second limiting hole communicated with two opposite ends of the expansion element in the axial direction, and the first limiting hole and the second limiting hole are communicated with each other; the expansion element comprises two semi-cylindrical sub expansion elements, the two sub expansion elements are spliced to form the expansion element, and half of each of the first limiting hole and the second limiting hole is respectively arranged in one sub expansion element; the connecting part penetrates through the first limiting hole, and the moving part is limited in the second limiting hole; the second limiting hole comprises a straight line section and a plurality of spherical sections which are arranged at intervals along the axial direction of the straight line section, the diameter of each spherical section is larger than that of the straight line section, and each rolling body is limited in one spherical section;
when the two control elements are close to each other in the axial direction of the expansion element, the rolling bodies move into the straight line segment to increase the diameter of the straight line segment, thereby increasing the outer diameters of the opposite ends of the expansion element accommodated in the second installation position.
2. The pipe pile vibration-resistant connector according to claim 1, wherein the connecting cylinder comprises a body, two second flanges and reinforcing ribs, the second flanges are fixedly connected to opposite ends of the body along the axial direction of the body respectively, the reinforcing ribs are fixedly connected to the outer peripheral surface of the body, and opposite ends of the reinforcing ribs along the axial direction of the body are fixedly connected to the two second flanges respectively.
3. The pipe pile vibration-resistant connector according to claim 2, wherein the outer diameter of the second flange is larger than the outer diameter of the body.
4. The pipe pile vibration-resistant connector according to claim 2, wherein the reinforcing ribs are plural, and the plural reinforcing ribs are arranged at intervals around the axial direction of the body.
5. The pipe pile vibration-resistant connector according to claim 2, wherein the outer diameter of the buffer portion is matched with the outer diameter of the second flange, and one side of the buffer portion along the axial direction of the buffer portion is attached to one side of the second flange.
6. The pipe pile vibration-resistant connector according to claim 2, wherein the connecting cylinder is formed by welding the body with the second flange plate and the body with the reinforcing ribs or integrally casting the connecting cylinder by using a die.
7. The pipe pile vibration-resistant connector according to claim 2, wherein the middle part of the outer circumferential surface of the expansion element is fixedly mounted on the inner side wall of the body by a fixing bolt.
8. The anti-vibration connector of pipe pile according to claim 1, wherein the connecting members are respectively mounted at opposite ends of the two connecting portions exposed to the expansion element.
9. The pipe pile vibration-resistant connector according to claim 1, wherein the elastic element is a siliconized rubber material.
10. A tubular pile cage structure comprising a plurality of tubular piles connected end to end and a tubular pile anti-vibration connector according to any of claims 1 to 9 for connecting two adjacent tubular piles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111556265.6A CN114197462B (en) | 2021-12-17 | 2021-12-17 | Tubular pile vibration-resistant connector and tubular pile cage structure |
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| CN202111556265.6A CN114197462B (en) | 2021-12-17 | 2021-12-17 | Tubular pile vibration-resistant connector and tubular pile cage structure |
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| CN114197462A CN114197462A (en) | 2022-03-18 |
| CN114197462B true CN114197462B (en) | 2023-08-01 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2098555C1 (en) * | 1996-01-30 | 1997-12-10 | Юрий Андреевич Шишков | Shishkov's butt joint of tubular pile sections |
| US20090110488A1 (en) * | 2007-10-30 | 2009-04-30 | Pearson Everett A | Method of splicing a pair of foundation piles |
| CN207193967U (en) * | 2017-09-19 | 2018-04-06 | 国家电网公司 | A kind of prestressed concrete pipe pile end plate |
| CN109322305A (en) * | 2018-11-22 | 2019-02-12 | 常德定海管桩有限公司 | Pretensioned-prestressed tube pile jointing and tubular pole connection method |
| CN111173684A (en) * | 2020-03-02 | 2020-05-19 | 明阳智慧能源集团股份公司 | Lattice formula prestressed concrete wind power generation tower |
| CN212506242U (en) * | 2020-05-18 | 2021-02-09 | 健研检测集团有限公司 | Pile splicing device |
| CN111560972A (en) * | 2020-05-20 | 2020-08-21 | 太原理工大学 | PHC tubular pile and bearing platform mortise-tenon type semi-rigid joint |
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