CN104389306B - The stake of lower-prestressed prefabricated concrete solid - Google Patents
The stake of lower-prestressed prefabricated concrete solid Download PDFInfo
- Publication number
- CN104389306B CN104389306B CN201410607181.4A CN201410607181A CN104389306B CN 104389306 B CN104389306 B CN 104389306B CN 201410607181 A CN201410607181 A CN 201410607181A CN 104389306 B CN104389306 B CN 104389306B
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- CN
- China
- Prior art keywords
- terminal pad
- stake
- unit stake
- pile
- sleeve
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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
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts
- B28B21/60—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements
- B28B21/62—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts prestressed reinforcements circumferential laterally tensioned
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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
- E02D27/34—Foundations for sinking or earthquake territories
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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
- E02D27/52—Submerged foundations, i.e. submerged in open water
-
- 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
- E02D5/223—Details of top sections of foundation piles
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0046—Production methods using prestressing techniques
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
-
- 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
Abstract
The invention discloses the stake of a kind of lower-prestressed prefabricated concrete solid, it is characterized in that flyash or breeze, the water reducing agent of 0.5-2% and the corrosion inhibitor of 0.5-2% of the 10-30% mixing cement amount in concrete, prestressed reinforcement adopts common grade III steel muscle to carry out lower-prestressed stretch-draw, stretching force is 0.4-0.7 Steel Bar Tensile Strength doubly, the tensile strength of common grade III steel is 400Mpa, the terminal pad of one end of pile top rear end and unit stake is respectively equipped with sleeve, the other end of unit stake is provided with and stretches out terminal pad 3-6cm and the steel bar end that can insert the common grade III steel muscle in sleeve, the connection of pile top and unit stake is that the steel bar end stretching out unit stake terminal pad inserts in the sleeve of pile top rear end, terminal pad in terminal pad in pile top and unit stake is weldingly connected, connection between unit stake is that the steel bar end stretching out unit stake terminal pad inserts in the sleeve on another unit stake terminal pad, the terminal pad of two unit stakes is through being weldingly connected, there is technique simple, favorable anti-corrosion effect, shock resistance is strong, the advantages such as long service life.
Description
Technical field
The present invention relates to the stake that surface structures uses, specifically high, the long service life anti-seismic performance of a kind of corrosion resistance good the stake of lower-prestressed prefabricated concrete solid.
Background technology
As everyone knows, the special durability regulation proposing concrete pile in pile foundation 08 specification, particularly coastal area, general employing in situ pile and high pre-stress pile tube now, durability and the shock resistance of these two kinds of stakes are poor, in addition, if emphasize most preferred side's prefabricated concrete solid stake under deep-etching situation in pile foundation 08 specification, solid pile is compared with hollow shell pill, in equal service condition situation, solid pile can increase concrete corrosive power, prefabricated concrete solid stake is compared with concrete perfusion solid pile, prefabricated concrete solid stake is not blended with corrosive ground and water in formation of pile, improve corrosion resistance and extend application life, existing prefabricated concrete solid stake is made up of pile body, pile crown, pile body is made up of at least one segment unit stake, unit stake and pile crown are by concrete and be located at the reinforcing bar be parallel to each other in concrete and form, the two ends of reinforcing bar are connected with plate-like terminal pad respectively, that is pile crown be connected with unit stake hold, the two ends of unit stake are provided with terminal pad, pile crown is connected (two terminal pads weld mutually) through terminal pad with between unit stake and unit stake, and bonding strength is low, shock resistance is poor, reinforcing bar in unit stake adopts high-strength low relaxed prestress rod iron, Main Function due to stake supports building, the pressure of the mainly building born, but what adopt in stake is high-strength low relaxed prestress rod iron, its prestressing force applied is very large, stretching force is the Steel Bar Tensile Strength of 0.7 times, and the tensile strength of common grade III steel is 1420Mpa, so reduce the supporting capacity of pile body, in addition, when adopting high-strength low relaxed prestress rod iron to make stake, the concrete that existing precast concrete solid pile uses adopts cement, sand and stone, the ratio of cement, sand and stone is cement 3-5 part, sand 5-10 part, stone 10-13 part, the pile body antiseptic power extreme difference that this concrete is made, affects the application life of stake, existing prefabricated concrete solid stake is to terminal pad without any preservative treatment measure, and terminal pad erosion resistance is poor, and being easy to blends with corrosivity Tu Shui is corroded, and affects application life and the shock resistance of stake.
Summary of the invention
The object of the invention is to solve above-mentioned the deficiencies in the prior art, provide that a kind of shock resistance is strong, the lower-prestressed prefabricated concrete solid stake of favorable anti-corrosion effect, long service life.
The technical solution adopted for the present invention to solve the technical problems is.
The stake of a kind of lower-prestressed prefabricated concrete solid, comprise pile body, pile crown, pile body is made up of at least one segment unit stake, unit stake and pile crown are made up of the reinforcing bar be parallel to each other in concrete and concrete, the two ends of reinforcing bar are connected with terminal pad respectively, adjacent two terminal pad welding form pile body, pile crown is taper, concrete adopts cement, sand and stone, the ratio of cement, sand and stone is cement 3-5 part, sand 5-10 part, stone 10-13 part, it is characterized in that flyash or the breeze of the 10-30% mixing cement amount in concrete, mix the corrosion inhibitor of the water reducing agent of the 0.5-2% of cement amount and the 0.5-2% of cement amount, the prestressed reinforcement be parallel to each other in concrete adopts common grade III steel muscle to carry out lower-prestressed stretch-draw, stretching force is 0.4-0.7 Steel Bar Tensile Strength doubly, the tensile strength of common grade III steel is 400Mpa, decreases the high-prestressed additional prestressing increased pile body, because the elongation per unit length of common grade III steel muscle is large, the ability of abatement seismic forces is strong, improves the shock resistance of stake, in addition, the diameter of common grade III steel muscle is larger than high-strength low relaxed prestress rod iron diameter, and anticorrosive allowance is large, and space wastage rate is little, the terminal pad of one end of pile top rear end and unit stake is respectively equipped with the sleeve of common grade III steel muscle grafting, the other end of unit stake is provided with and stretches out terminal pad 3-6cm and the steel bar end that can insert the common grade III steel muscle in sleeve, the connection of pile top and unit stake is that the steel bar end stretching out unit stake terminal pad inserts in the sleeve of pile top rear end, terminal pad in terminal pad in pile top and unit stake is weldingly connected, connection between unit stake is that the steel bar end stretching out unit stake terminal pad inserts in the sleeve on another unit stake terminal pad, the terminal pad of two unit stakes is through being weldingly connected, to form interior muscle, the dual link of overcoat, add the integrated connection intensity of stake, simultaneously, interior joint bar serves again a positioning action, be convenient to the welding of terminal pad, improve the connection speed of pile body, the terminal pad of described unit stake and pile top is than pile body or the thin 1-3mm in the large footpath of pile top, two terminal pads after welding are wound around anti-corrosion resin layer, anti-corrosion resin layer is provided with the fibrage that can improve antiseptic power and resistance to tension, pile crown is provided with epoxy resin topping, and the thickness of anti-corrosion resin layer and the thickness of carbon fiber layer are all less than 1.5mm.
The steel bar end of the terminal pad of pile top of the present invention, unit stake inserts the sleeve on another unit stake terminal pad, be provided with resin bed between sleeve and steel bar end, play and strengthen bonding strength and prevent steel bar end and sleeve from corroding and affecting intensity and the application life of pile body.
Sleeve on terminal pad of the present invention is connected with the common grade III steel muscle in unit stake respectively, and steel bar end is the extension of the common grade III steel muscle in unit stake, to improve the bonding strength of pile body.
The present invention is to the terminal pad exposed, reinforcing bar and be connected junction and pile top adds topping, and topping also add its tension, wear resistance in addition, has the advantages such as technique is simple, favorable anti-corrosion effect, long service life.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is a kind of structural representation of pile top in the present invention.Fig. 3 is a kind of structural representation of unit stake in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in the figure: the stake of a kind of lower-prestressed prefabricated concrete solid, comprise pile body, pile crown 1, pile body is made up of at least one segment unit stake 2, unit stake 2 and pile crown 1 are made up of the reinforcing bar 3 be parallel to each other in concrete and concrete, the two ends of reinforcing bar 3 are connected with terminal pad 4 respectively, adjacent two terminal pads 4 weld and form pile body, pile crown 1 is in taper, the structure of above-mentioned each ingredient and the interconnected relationship between them same as the prior art, this does not repeat, the concrete forming pile body and pile crown 1 adopts cement, sand and stone, cement, the ratio of sand and stone is cement 3-5 part, sand 5-10 part, stone 10-13 part, itself and same as the prior art, this does not repeat, the invention is characterized in concrete flyash or the breeze of the 10-30% mixing cement amount, improve the impermeability of solidifying soil, eliminate and decrease the existence of calcium hydroxide in concrete, the chlorion of stake in environment for use and sulfate ion infiltration capacity reduce, and avoid pile body to expand and destroy reaction, described concrete also mixes the corrosion inhibitor of the water reducing agent of the 0.5-2% of cement amount and the 0.5-2% of cement amount, improve the chloride resisting properties of concrete impermeability and reinforcing bar, the prestressed reinforcement 3 be parallel to each other in concrete adopts common grade III steel muscle to carry out lower-prestressed stretch-draw, stretching force is 0.4-0.7 Steel Bar Tensile Strength doubly, the tensile strength of common grade III steel is 400Mpa, namely stretching force is (0.4-0.7) * 400Mpa=160-280Mpa, decreases the high-prestressed additional prestressing increased pile body, because the elongation per unit length more high-strength low relaxed prestress rod iron of common grade III steel muscle is much larger, when an earthquake occurs, the ability that seismic forces cut down by prestressed reinforcement 3 is strong, and seismic forces destroys little to the curved scissors that pile body causes, and improves the shock resistance of stake, in addition, the diameter of common grade III steel muscle is more much larger than high-strength low relaxed prestress rod iron diameter, and when reinforcement ratio is identical, the anticorrosive allowance of prestressed reinforcement 3 is large, and space wastage rate is little, prestressed reinforcement 3 in the present invention applies lower-prestressed (160-280Mpa), with demand of anti-crack when meeting unit stake lifting for standard, reduce over the high-prestressed subsidiary stress to unit stake pile body, and the stretching force of the high-strength low relaxed prestress rod iron used in existing unit stake is the Steel Bar Tensile Strength of about 0.7 times, the tensile strength of high-strength low relaxed prestress rod iron is 1420Mpa, namely stretching force is about 0.7*1420Mpa=994Mpa, as can be seen here, its value of thrust is much larger than prestressed reinforcement 3 stretching force (160-280Mpa) in the present invention, the terminal pad 4 of one end of pile top 1 rear end of the present invention and unit stake 2 is respectively equipped with the sleeve 5 of common grade III steel muscle grafting, the other end of unit stake 2 is provided with and stretches out terminal pad 3-6cm and the steel bar end 6 that can insert the common grade III steel muscle in sleeve 5, pile top 1 is that the steel bar end 6 stretching out unit stake 2 terminal pad inserts in the sleeve 5 of pile top 1 rear end with the connection of unit stake 2, terminal pad 4 in pile top 1 is weldingly connected with the terminal pad 4 in unit stake 2, connection between unit stake 2 is that the steel bar end 6 stretching out unit stake terminal pad 4 inserts in the sleeve 5 on another unit stake terminal pad 4, the terminal pad of two unit stakes is through being weldingly connected, to form interior muscle, the dual link of overcoat, add the integrated connection intensity of stake, simultaneously, interior joint bar serves again a positioning action, be convenient to the welding of terminal pad, improve the connection speed of pile body, the terminal pad 4 of described unit stake 2 and pile top 1 is than pile body or the thin 1-3mm in the large footpath of pile top, two terminal pads to be after welding wound around anti-corrosion resin layer 7, anti-corrosion resin layer 7 is provided with the fibrage that can improve antiseptic power and resistance to tension, pile crown 1 is provided with epoxy resin topping 7, thickness and the fibrolaminar thickness of anti-corrosion resin layer 7 are all less than 1.5mm, diameter after making terminal pad place be wound around anti-corrosion resin layer 7 and fibrage is not more than unit stake diameter, is convenient to the installation of stake, described pile top 1, the steel bar end 6 of the terminal pad 4 of unit stake 2 inserts the sleeve 5 on another unit stake terminal pad 4, resin bed is provided with between sleeve 5 and steel bar end 6, namely pour into a little resin cover people, again steel bar end 6 is inserted in sleeve 5, strengthen bonding strength to play and prevent steel bar end and sleeve from corroding and affect intensity and the application life of pile body, improve unit pile joint anti-to dial, bending resistance, shearing resistance, the performances such as anti-corruption, in addition, sleeve 5 on terminal pad 4 of the present invention is connected with the common grade III steel muscle 3 in unit stake 2 respectively, steel bar end 6 is the extension of the common grade III steel muscle 3 in unit stake 2, to improve the bonding strength of pile body, common grade III steel muscle 3 in the present invention adopts lower-prestressed, the initial prestressing force balance of every root common grade III steel muscle 3 of component units stake, ensure that the stretching force of every root common grade III steel muscle 3 is even, there is technique simple, favorable anti-corrosion effect, shock resistance is strong, the advantages such as long service life.
Claims (3)
1. lower-prestressed prefabricated concrete solid stake, comprise pile body, pile crown, pile body is made up of at least one segment unit stake, unit stake and pile crown are made up of the reinforcing bar be parallel to each other in concrete and concrete, the two ends of reinforcing bar are connected with terminal pad respectively, adjacent two terminal pad welding form pile body, pile crown is taper, concrete adopts cement, sand and stone, the ratio of cement, sand and stone is cement 3-5 part, sand 5-10 part, stone 10-13 part, it is characterized in that flyash or the breeze of the 10-30% mixing cement amount in concrete, mix the corrosion inhibitor of the water reducing agent of the 0.5-2% of cement amount and the 0.5-2% of cement amount, the prestressed reinforcement be parallel to each other in concrete adopts common grade III steel muscle and carries out lower-prestressed stretch-draw, stretching force is the Steel Bar Tensile Strength of 0.4-0.7, the terminal pad of one end of pile top rear end and unit stake is respectively equipped with the sleeve of common grade III steel muscle grafting, the other end of unit stake is provided with and stretches out terminal pad 3-6cm and the steel bar end that can insert the common grade III steel muscle in sleeve, the connection of pile top and unit stake is that the steel bar end stretching out unit stake terminal pad inserts in the sleeve of pile top rear end, steel bar end is the extension of the common grade III steel muscle in unit stake, terminal pad in terminal pad in pile top and unit stake is weldingly connected, connection between unit stake is that the steel bar end stretching out unit stake terminal pad inserts in the sleeve on another unit stake terminal pad, the terminal pad of two unit stakes is through being weldingly connected, the terminal pad of unit stake and pile top is than pile body or the thin 1-3mm in the large footpath of pile top, two terminal pads after welding are wound around anti-corrosion resin layer, anti-corrosion resin layer is provided with the fibrage that can improve antiseptic power and resistance to tension, the thickness of anti-corrosion resin layer and the thickness of carbon fiber layer are all less than 1.5mm.
2. a kind of lower-prestressed prefabricated concrete solid according to claim 1 stake, is characterized in that pile crown is provided with epoxy resin topping.
3. a kind of lower-prestressed prefabricated concrete solid according to claim 1 stake, is characterized in that pile top, the steel bar end of terminal pad of unit stake inserts sleeve on another unit stake terminal pad, is provided with resin bed between sleeve and steel bar end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410607181.4A CN104389306B (en) | 2014-11-03 | 2014-11-03 | The stake of lower-prestressed prefabricated concrete solid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410607181.4A CN104389306B (en) | 2014-11-03 | 2014-11-03 | The stake of lower-prestressed prefabricated concrete solid |
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| Publication Number | Publication Date |
|---|---|
| CN104389306A CN104389306A (en) | 2015-03-04 |
| CN104389306B true CN104389306B (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410607181.4A Active CN104389306B (en) | 2014-11-03 | 2014-11-03 | The stake of lower-prestressed prefabricated concrete solid |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174857A (en) * | 2015-06-26 | 2015-12-23 | 四川华构住宅工业有限公司 | Fiber concrete prefabrication member |
| CN109826192A (en) * | 2019-03-08 | 2019-05-31 | 沈阳建筑大学 | A kind of prefabricated PC fender post |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3215516B2 (en) * | 1991-09-20 | 2001-10-09 | 太平洋セメント株式会社 | Hydraulic composition and method for producing concrete pile using the composition |
| JP4555976B2 (en) * | 2004-04-28 | 2010-10-06 | 三谷セキサン株式会社 | Concrete ready-made pile |
| CN103046545A (en) * | 2013-01-17 | 2013-04-17 | 浙江东欣建设集团有限公司 | Production process of prestress FRP-rib (fiber reinforce plastic-rib) concrete pipe pile |
| CN103806445A (en) * | 2014-03-10 | 2014-05-21 | 威海市水利岩土工程有限公司 | High-performance low-prestress concrete solid square pile |
| CN203821377U (en) * | 2014-01-24 | 2014-09-10 | 俞向阳 | Pre-tensioning method centrifugal concrete pile with steel strands |
| CN204225096U (en) * | 2014-11-03 | 2015-03-25 | 威海齐德新型建材有限公司 | The stake of lower-prestressed prefabricated concrete solid |
-
2014
- 2014-11-03 CN CN201410607181.4A patent/CN104389306B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3215516B2 (en) * | 1991-09-20 | 2001-10-09 | 太平洋セメント株式会社 | Hydraulic composition and method for producing concrete pile using the composition |
| JP4555976B2 (en) * | 2004-04-28 | 2010-10-06 | 三谷セキサン株式会社 | Concrete ready-made pile |
| CN103046545A (en) * | 2013-01-17 | 2013-04-17 | 浙江东欣建设集团有限公司 | Production process of prestress FRP-rib (fiber reinforce plastic-rib) concrete pipe pile |
| CN203821377U (en) * | 2014-01-24 | 2014-09-10 | 俞向阳 | Pre-tensioning method centrifugal concrete pile with steel strands |
| CN103806445A (en) * | 2014-03-10 | 2014-05-21 | 威海市水利岩土工程有限公司 | High-performance low-prestress concrete solid square pile |
| CN204225096U (en) * | 2014-11-03 | 2015-03-25 | 威海齐德新型建材有限公司 | The stake of lower-prestressed prefabricated concrete solid |
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| CN104389306A (en) | 2015-03-04 |
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