CN104358253A - Variable-section concave-convex pile - Google Patents
Variable-section concave-convex pile Download PDFInfo
- Publication number
- CN104358253A CN104358253A CN201410542367.6A CN201410542367A CN104358253A CN 104358253 A CN104358253 A CN 104358253A CN 201410542367 A CN201410542367 A CN 201410542367A CN 104358253 A CN104358253 A CN 104358253A
- Authority
- CN
- China
- Prior art keywords
- plug
- pile body
- stake
- slot
- concavo
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000002689 soil Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010058109 Hangnail Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
-
- 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
- E02D5/48—Piles varying in construction along their length, i.e. along the body between head and shoe, e.g. made of different materials along their length
-
- 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
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
-
- 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
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/20—Miscellaneous comprising details of connection between elements
Landscapes
- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a variable-section concave-convex pile. The variable-section concave-convex pile comprises strip-shaped pile bodies, wherein each pile body is of a concave-convex shape and has different section areas; at least one connecting piece capable of connecting every two pile bodies is arranged at each of two ends of each pile body; each connecting piece comprises a plug assembly and a socket assembly; each plug assembly protrudes out of one end of the corresponding pile body, and each socket assembly is recessed in one end of the corresponding pile body; each plug assembly and the corresponding socket assembly are positioned at the two ends of the corresponding pile body respectively; when the plug assembly of one pile body is inserted into the socket assembly of another pile body, the plug assembly and the socket assembly are hermetically connected. The variable-section concave-convex pile has the advantages of high uplift bearing capacity, high convenience in connection, high corrosion resistance, long service life and the like.
Description
Technical field
The invention belongs to building trade prefabricated component technical field, relate to the concavo-convex stake of a kind of variable cross-section.
Background technology
Because the quality stability of tube-sinking cast-in-situ pile is relatively poor, in recent years, precast prestressed concrete stake obtains swift and violent development, prestressed concrete pile is exactly wherein a kind of pile-type, existing concrete pre-stress stake is generally in identical cross section, the namely shape invariance of pile body, usually have square, circular etc., the anti-pulling capacity of this stake is poor.
In piling process, will need according to different the stake selecting different length, this just needs between stake and stake by being interconnected the pile body forming longer length.The two ends of existing concrete pre-stress stake are provided with steel plate, and concrete pre-stress stake is connected by being welded to each other between steel plate.After pile body after connection is pressed into underground when piling, due to the especially villaumite that contains salt in soil, can corrosion be formed to the steel plate be exposed in soil, cause the junction between stake and stake to be ruptured, thus connection stake is disconnected.In addition, carried out the mode relative complex connected by the welding of steel plate, connect inconvenience.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of easy to connect, the concavo-convex stake of the variable cross-section that junction corrosion resistance is good and anti-pulling capacity is strong.
For achieving the above object, present invention employs following technical proposal: the concavo-convex stake of a kind of variable cross-section, comprise the pile body of strip, described pile body is different concavo-convex of sectional area, the two ends of pile body are provided with at least one can allow two interconnective connectors of pile body, described connector comprises the protrusion plug-assembly of pile body one end and the slot component of recessed pile body one end, and plug-assembly and slot component lay respectively at the two ends of pile body, when the plug-assembly of a pile body is inserted in the slot component of another pile body, plug-assembly and slot component are tightly connected.
Preferably, described pile body comprises heavy in section stake and small bore stake, and heavy in section stake and small bore stake are alternately arranged formation pile body.
Preferably, connect with draft angle between described heavy in section stake and small bore stake.
Preferably, described plug-assembly comprises the plug base be fixed in pile body and the plug extending pile body outside, described slot component comprises the slot be fixed in pile body and the joint ring be fixedly connected with the oral area of slot, when plug is inserted in slot, plug is connected with seal ring seal.
Preferably, described plug and plug base are demountable structure, one end that plug is adjacent with plug base is provided with the female screwed hole of tool, plug base is provided with has externally threaded stud, described stud and screwed hole cooperatively interact, when stud and screw hole, described plug and plug base are spirally connected.
Preferably, described plug comprises connection-peg and Plug Division, connection-peg and screwed hole are positioned at the two ends of Plug Division, described Plug Division is large lower young rounding taper type suitable for reading, the inner chamber of described joint ring is the rounding taper type under large end opening suitable for reading, and described connection-peg is the little cydariform broad in the middle in two.
Preferably, be positioned at below joint ring and be provided with a snap ring in described slot, when Plug Division is inserted in slot, described snap ring is fastened on Plug Division.
Preferably, be also provided with an elastic component in described slot, described elastic component one end is resisted against bottom slot, the other end be resisted against on snap ring.
Preferably, described snap ring is put together by some block-shaped, that size is identical cards, and when some pieces of card splits are snap ring, chuck is formed at the top of snap ring inwall, the pulling-preventing mechanism be made up of some saw-tooth rings is formed at the bottom of snap ring inwall, the matching form of the junction of the shape of described chuck and connection-peg and Plug Division is fitted, and described joint ring and slot are spirally connected.
Preferably, described plug base and the bottom of slot are connected with the pin extending to pile body inside.
The invention has the beneficial effects as follows:
1, because the sectional area difference of pile body is formed concavo-convex, substantially increase the frictional force between pile body and soil, there is resistance to compression, advantage that anti-pulling capacity is high;
2, easy to connect, junction sealing performance is high, and resistance to corrosion is strong, and connector close and firm, improves the application life of pile body.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation in another direction of the present invention;
Fig. 3 is the structural representation of pile body when being interconnected;
Fig. 4 is the structural representation of connector;
Fig. 5 is another kind of structural representation of the present invention;
Fig. 6 is another kind of structural representation of the present invention;
Fig. 7 is another kind of structural representation of the present invention;
Fig. 8 is another kind of structural representation of the present invention;
Fig. 9 is the structural representation of card provided by the invention.
In figure: pile body 10, heavy in section stake 11, small bore stake 12, draft angle 13, plug-assembly 20, plug base 21, plug 22, connection-peg 221, Plug Division 222, screwed hole 23, stud 24, slot component 30, slot 31, joint ring 32, snap ring 33, card 331, chuck 332, saw-tooth ring 333, elastic component 34, pin 40.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described.
As Figure 1-3, the concavo-convex stake of a kind of variable cross-section, comprise the pile body 10 of strip, the usual concrete for making of pile body 10 is shaping, concavo-convex different in sectional area of described pile body 10, sectional area described here, refer to the cross-sectional area of pile body 10, it is pointed out that the shape of pair cross-section does not need the restriction that fixes, that is, the cross section of pile body 10 can be circular, oval, square, triangle, polygon or other unfixed shapes.Pile body 10 comprises heavy in section stake 11 and small bore stake 12, and heavy in section stake 11 and small bore stake 12 are alternately arranged and form pile body 10.As shown in Figure 1, heavy in section stake 11 and small bore stake 12 are square; As shown in Figure 5, heavy in section stake 11 and small bore stake 12 are circle; As shown in Figure 6, heavy in section stake 11 is circular, and small bore stake 12 is square; As shown in Figure 7, heavy in section stake 11 is square, and small bore stake 12 is triangle; As shown in Figure 8, heavy in section stake 11 is circular, and small bore stake 12 is oval.In addition, the two ends of pile body 10 can be heavy in section stake 11 simultaneously or be small bore stake 12 simultaneously, also can be one end are heavy in section stake 11, and the other end is small bore stake 12.
Preferably, connect with draft angle 13 between heavy in section stake 11 and small bore stake.
The two ends of pile body 10 are provided with at least one can allow two interconnective connectors of pile body 10, described connector comprises the protrusion plug-assembly 20 of pile body 10 one end and the slot component 30 of recessed pile body one end, and plug-assembly 20 and slot component 30 lay respectively at the two ends of pile body 10, when the plug-assembly 20 of a pile body 10 is inserted in the slot component 30 of another pile body 10, plug-assembly 20 and slot component 30 are tightly connected.Obviously, the plug-assembly 20 on same pile body 10 and the position of slot component 30 are mutually one to one, so that plug-assembly 20 to be inserted into smoothly in slot component 30 thus to make two pile bodies 10 connect smoothly.When connector has multiple, can evenly be arranged on pile body 10, to connect.
The present invention relatively and the round stake of prior art and the junction plate of being located at round stake two ends have following advantages:
1, junction is not easily corroded, and can extend the connection lifetime between stake and stake thus the application life of prolongation stake.Existing stake is provided with the steel plate connected usually at two ends, two adjacent stakes connect stake by fixing formation of Plate Welding, after being pressed into underground when piling, due to the especially villaumite that contains salt in soil, corrosion can be formed to the steel plate be exposed in soil, cause the junction between stake and stake to be ruptured, thus connection stake is disconnected.
2, because the sectional area difference of pile body is formed concavo-convex, substantially increase the frictional force between pile body and soil, there is resistance to compression, advantage that anti-pulling capacity is high.
As shown in Figure 4, plug-assembly 20 comprises the plug base 21 be fixed in pile body 10 and the plug 22 extending pile body 10 outside, described slot component 30 comprises the slot 31 be fixed in pile body 10 and the joint ring 32 be fixedly connected with the oral area of slot 31, when plug 22 is inserted in slot 31, plug 22 and joint ring 32 are tightly connected.Joint ring 32 can adopt the materials such as rubber, polytetrafluoroethylene (PTFE), epoxy resin to make.If do not adopt joint ring 32 to seal, also can adopt to smear encapsulant at the two ends of pile body 10 or at the affixed sealing ring in the two ends of pile body 10 as O type circle, pad establish rubber pad to seal, but sealing effectiveness does not have joint ring 32 good.
Preferred version, plug 22 and plug base 21 are demountable structure, one end that plug 22 is adjacent with plug base 21 is provided with the female screwed hole 23 of tool, plug base 21 is provided with has externally threaded stud 24, described stud 24 cooperatively interacts with screwed hole 23, when stud 24 is spirally connected with screwed hole 23, described plug 22 is spirally connected with plug base 21.This design is convenient to dismantle plug 22, prevents plug 22 from transportation, running into impact damage.
Plug 22 comprises connection-peg 221 and Plug Division 222, connection-peg 221 and screwed hole 23 are positioned at the two ends of Plug Division 222, described Plug Division 222 is in large lower young rounding taper type suitable for reading, the inner chamber of described joint ring 32 is the rounding taper type under large end opening suitable for reading, Plug Division 222 cooperatively interacts with the inner chamber of joint ring 32, formed and seal closely, described connection-peg 221 is in the little cydariform broad in the middle in two.
Be positioned at below joint ring 32 and be provided with a snap ring 33 in slot 31, when Plug Division 222 is inserted in slot 31, described snap ring 33 is fastened on Plug Division 222, improves the bonding strength between plug 22 and slot 31.Also be provided with an elastic component 34 in slot 31, elastic component 34 can be the spring of cylindrical spring or other shapes, also can be have flexible pad, and described elastic component 34 one end is resisted against bottom slot 31, the other end be resisted against on snap ring 33.Again shown in composition graphs 9, preferably, described snap ring 33 is by some block-shaped, the card 331 that size is identical is put together, and when some pieces of cards 331 split is snap ring 33, chuck 332 is formed at the top of snap ring 33 inwall, the pulling-preventing mechanism be made up of some saw-tooth rings 333 is formed at the bottom of snap ring 33 inwall, saw-tooth ring 333 reality forms hangnail, this pulling-preventing mechanism is used for preventing connection-peg 221 from departing from from snap ring 33, the matching form of the shape of described chuck 332 and the junction of connection-peg 221 and Plug Division 222 is fitted, described joint ring 32 is spirally connected with slot 31, more preferably, card 331 has 4, identical and fan-shaped in 90 ° of the shape size of every sheet.
The bottom of plug base 21 and slot 31 is connected with the pin 40 extending to pile body 10 inside.Pin 40 is for improving the bonding strength of plug base 21 and slot 31 and pile body 10.
In sum, the present invention does not need welding just can make to be connected between stake with stake, easy to connect, and junction resistance to corrosion is strong, is connected firmly, long service life, the advantages such as anti-pulling capacity is strong.
Above-described embodiment is used for explaining and the present invention is described, instead of limits this aspect, and in the protection domain of spirit of the present invention and claim, any amendment make this aspect and change, all fall into protection scope of the present invention.
Claims (10)
1. the concavo-convex stake of variable cross-section, comprise the pile body (10) of strip, it is characterized in that, concavo-convex different in sectional area of described pile body (10), the two ends of pile body (10) are provided with at least one can allow two interconnective connectors of pile body (10), described connector comprises the protrusion plug-assembly (20) of pile body (10) one end and the slot component (30) of recessed pile body one end, and plug-assembly (20) and slot component (30) lay respectively at the two ends of pile body (10), when the plug-assembly (20) of a pile body (10) is inserted in the slot component (30) of another pile body (10), plug-assembly (20) and slot component (30) are tightly connected.
2. the concavo-convex stake of variable cross-section according to claim 1, it is characterized in that, described pile body (10) comprises heavy in section stake (11) and small bore stake (12), and heavy in section stake (11) and small bore stake (12) are alternately arranged and form pile body (10).
3. the concavo-convex stake of variable cross-section according to claim 2, is characterized in that, connects between described heavy in section stake (11) and small bore stake with draft angle (13).
4. the concavo-convex stake of variable cross-section according to claim 1, it is characterized in that, described plug-assembly (20) comprises the plug base (21) be fixed in pile body (10) and the plug (22) extending pile body (10) outside, described slot component (30) comprises the slot (31) be fixed in pile body (10) and the joint ring (32) be fixedly connected with the oral area of slot (31), when plug (22) is inserted in slot (31), plug (22) and joint ring (32) are tightly connected.
5. the concavo-convex stake of variable cross-section according to claim 4, it is characterized in that, described plug (22) and plug base (21) are demountable structure, one end that plug (22) is adjacent with plug base (21) is provided with the female screwed hole of tool (23), plug base (21) is provided with has externally threaded stud (24), described stud (24) and screwed hole (23) cooperatively interact, when stud (24) is spirally connected with screwed hole (23), described plug (22) and plug base (21) are spirally connected.
6. the concavo-convex stake of variable cross-section according to claim 5, it is characterized in that, described plug (22) comprises connection-peg (221) and Plug Division (222), connection-peg (221) and screwed hole (23) are positioned at the two ends of Plug Division (222), described Plug Division (222) is in large lower young rounding taper type suitable for reading, the inner chamber of described joint ring (32) is the rounding taper type under large end opening suitable for reading, and described connection-peg (221) is little cydariform broad in the middle in two.
7. the concavo-convex stake of variable cross-section according to claim 6, it is characterized in that, be positioned at joint ring (32) below and be provided with a snap ring (33) in described slot (31), when Plug Division (222) are inserted in slot (31), described snap ring (33) is fastened on Plug Division (222).
8. the concavo-convex stake of variable cross-section according to claim 7, it is characterized in that, an elastic component (34) is also provided with in described slot (31), described elastic component (34) one end be resisted against slot (31) bottom, the other end be resisted against on snap ring (33).
9. the concavo-convex stake of variable cross-section according to claim 8, it is characterized in that, described snap ring (33) is by some block-shaped, the card (331) that size is identical is put together, and when some pieces of cards (331) split is snap ring (33), chuck (332) is formed at the top of snap ring (33) inwall, the pulling-preventing mechanism be made up of some saw-tooth rings (333) is formed at the bottom of snap ring (33) inwall, the matching form of the shape of described chuck (332) and the junction of connection-peg (221) and Plug Division (222) is fitted, described joint ring (32) and slot (31) are spirally connected.
10. the concavo-convex stake of variable cross-section according to claim 4, is characterized in that, described plug base (21) and the bottom of slot (31) are connected with and extend to the inner pin (40) of pile body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410542367.6A CN104358253B (en) | 2014-10-14 | 2014-10-14 | The concavo-convex stake of variable cross-section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410542367.6A CN104358253B (en) | 2014-10-14 | 2014-10-14 | The concavo-convex stake of variable cross-section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104358253A true CN104358253A (en) | 2015-02-18 |
| CN104358253B CN104358253B (en) | 2016-02-17 |
Family
ID=52525552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410542367.6A Active CN104358253B (en) | 2014-10-14 | 2014-10-14 | The concavo-convex stake of variable cross-section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104358253B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104895050A (en) * | 2015-06-09 | 2015-09-09 | 周兆弟 | Tension nut sunken type prefabricated pile |
| CN105926615A (en) * | 2016-05-10 | 2016-09-07 | 温岭市呈隆管桩有限公司 | Improved variable-section hollow square pile |
| CN106149710A (en) * | 2015-04-27 | 2016-11-23 | 卓达 | It is mechanically connected prestressing force ring square pile |
| CN110528506A (en) * | 2018-05-24 | 2019-12-03 | 周兆弟 | A kind of polygon prefabricated pile |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10227030A (en) * | 1997-02-18 | 1998-08-25 | Iwaki Kouzou Keisan Center:Kk | Steel pipe pile with expanded bottom |
| CN201314044Y (en) * | 2008-03-17 | 2009-09-23 | 周兆弟 | Abutting joint piece of dead-drawn fastener and prestressing prefabricated member consisting of abutting joint pieces of dead-drawn fastener |
| CN201367582Y (en) * | 2009-02-26 | 2009-12-23 | 中冶京唐建设有限公司 | Prestressed pipe pile joint |
| CN101864770A (en) * | 2010-06-12 | 2010-10-20 | 缪立军 | Quick coupling of square pile |
| CN103603349A (en) * | 2013-11-22 | 2014-02-26 | 山东大学 | Ribbed prestressed pipe pile, and manufacturing method and drilling-planting construction process thereof |
| CN204174611U (en) * | 2014-10-14 | 2015-02-25 | 周兆弟 | The concavo-convex stake of a kind of variable cross-section |
-
2014
- 2014-10-14 CN CN201410542367.6A patent/CN104358253B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10227030A (en) * | 1997-02-18 | 1998-08-25 | Iwaki Kouzou Keisan Center:Kk | Steel pipe pile with expanded bottom |
| CN201314044Y (en) * | 2008-03-17 | 2009-09-23 | 周兆弟 | Abutting joint piece of dead-drawn fastener and prestressing prefabricated member consisting of abutting joint pieces of dead-drawn fastener |
| CN201367582Y (en) * | 2009-02-26 | 2009-12-23 | 中冶京唐建设有限公司 | Prestressed pipe pile joint |
| CN101864770A (en) * | 2010-06-12 | 2010-10-20 | 缪立军 | Quick coupling of square pile |
| CN103603349A (en) * | 2013-11-22 | 2014-02-26 | 山东大学 | Ribbed prestressed pipe pile, and manufacturing method and drilling-planting construction process thereof |
| CN204174611U (en) * | 2014-10-14 | 2015-02-25 | 周兆弟 | The concavo-convex stake of a kind of variable cross-section |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106149710A (en) * | 2015-04-27 | 2016-11-23 | 卓达 | It is mechanically connected prestressing force ring square pile |
| CN104895050A (en) * | 2015-06-09 | 2015-09-09 | 周兆弟 | Tension nut sunken type prefabricated pile |
| CN105926615A (en) * | 2016-05-10 | 2016-09-07 | 温岭市呈隆管桩有限公司 | Improved variable-section hollow square pile |
| CN110528506A (en) * | 2018-05-24 | 2019-12-03 | 周兆弟 | A kind of polygon prefabricated pile |
| CN110528506B (en) * | 2018-05-24 | 2021-09-17 | 周兆弟 | Polygonal precast pile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104358253B (en) | 2016-02-17 |
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Denomination of invention: Variable section concave convex pile Effective date of registration: 20200927 Granted publication date: 20160217 Pledgee: CITIC Bank Limited by Share Ltd. Ningbo branch Pledgor: Zhou Zhaodi Registration number: Y2020330000772 |