CN103967006A - Prefabricated sleeve and cast-in-place pile combination used for highly-corrosive environment and construction method thereof - Google Patents
Prefabricated sleeve and cast-in-place pile combination used for highly-corrosive environment and construction method thereof Download PDFInfo
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- CN103967006A CN103967006A CN201410153568.7A CN201410153568A CN103967006A CN 103967006 A CN103967006 A CN 103967006A CN 201410153568 A CN201410153568 A CN 201410153568A CN 103967006 A CN103967006 A CN 103967006A
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Abstract
The invention belongs to the field of civil engineering, and particularly relates to a prefabricated sleeve and cast-in-place pile combination used for highly-corrosive environment and a construction method thereof. The prefabricated sleeve and cast-in-place pile combination comprises a sleeve (1), the sleeve (1) is arranged in a highly-corrosive layer and is prefabricated concrete, and a reinforced framework is arranged in the concrete. The sleeve made of prefabricated reinforced concrete serves as an anti-corrosion protective barrier of a highly-corrosive cast-in-place pile, the anti-corrosion time of the prefabricated sleeve can be controlled through strict durability design and durability additional measures, the anti-corrosion capacity is reliable, internal cast-in-place pile body concrete can be protected permanently, and durability and safety hidden risks existing due to deficiencies of the case-in-place pile in the highly-corrosive environment are eliminated.
Description
Technical field
The invention belongs to field of civil engineering, relate in particular to a kind of prefabricated sleeve-perfusion compound pile and construction technology thereof for strong corrosive environment.
Background technology
Bored concrete pile foundation, because construction technology is ripe, bearing capacity high (can build large diameter pile), applied widely, has been widely used in the every field such as highway, railway and building.But castinplace pile is site operation, and belong to concealed work, its quality control difficulty is larger, may exist protective layer thickness deviation larger, and concrete density is poor, even occurs the inborn problems such as broken pile.And, under severe corrosive environment, reinforcing bar is first contact corrosion medium (soil or water) before concreting, and concrete also contacts with corrosive medium before unhardened, cannot carry out necessary coating protection to pile concrete again, cause its durability and safety to have very large danger and hidden danger.Therefore, < < Code for design of corrosion prevention of industrial buildings > > (GB50046-2008) has made the regulation of " should not adopt castinplace pile " for strong corrosive environment.
In recent years, along with the aggravation of environment pollution, and the development and construction in China coast and landlocked saline soil area, increasing engineering faces the threat of strong corrosive environment, in the urgent need to expanding the range of application of castinplace pile.According to engineering actual conditions, take rational technical measures, guarantee that castinplace pile resists the ability of strong corrosive medium, become numerous experts' common recognition and the focus of current research.The reasonable solution of this problem, is significant to national economy.
There are some researches show, common Concrete Anti corrosion measure comprises to be increased the thickness of concrete cover and improves concrete class.Effective addition thereto of four kinds of protection steel concrete of the up-to-date confirmation of ACI (ACI): abundant wet-cured low water binder ratio pair is mixed high performance concrete, resistant material is coated and apply rebar surface, electrochemical protection and reinforced concrete surface anticorrosive paint.
As disclosed Chinese patent application on July 10th, 2013, publication number: CN103195052A, it discloses a kind of castinplace pile and construction method thereof for high salt concentration solution corrosion environment, proposition is put steel casing at this body concrete of pile foundation peripheral hardware, and the anticorrosion time limit by respective thickness steel casing guarantees pile foundation endurance life.But in high salt concentration solution corrosion environment (the particularly drying and watering cycle section of bar in chlorine salt solution), steel casing is easy to corrosion, does not reach long-term protection effect, wastes a large amount of steel, and economic benefit is not good enough.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, and a kind of prefabricated sleeve-perfusion compound pile for strong corrosive environment is provided, and the present invention combines preformed pile reliable in quality, stable, and castinplace pile is applied widely, is convenient to the advantage of moulding large diameter pile.Meanwhile, can combine the measure that adopts multiple raising reinforced concrete structure corrosion resistance, remarkable to guaranteeing the durability effect of cast-in-place pile concrete structure.
For achieving the above object, the present invention adopts following technical scheme: it comprises sleeve, and sleeve is arranged in deep-etching layer, and sleeve is precast concrete, configuration reinforcement skeleton in concrete.
Sleeve is applicable to the pile foundation of any hole forming method construction, and prefabricated sleeve root edge is positioned at below deep-etching layer, and apical margin is to design of pile top absolute altitude.When engineering deep-etching water, solum are thicker, when length sleeve is longer, also sectional is prefabricated.Stack shell concrete material (high performance concrete) and structure (especially protective layer thickness) should meet the requirement of strong corrosive environment, can according to corresponding durability Design standard, (be specifically GB/T50476-2008 < < durability design standard > >, GB50007-2011 < < Code for design of building > >, < < Code for design of corrosion prevention of industrial buildings > > (GB50046-2008)) carry out special design.
The present invention proposes to adopt prefabricated reinforced concrete sleeve first, and the form of structure of prefabricated sleeve-perfusion compound pile belongs to a kind of new piling strtucture, for strong corrosive environment, needs and proposes.The proposition of this form of structure, just makes poured pile base lateral surface coating anti-rot material become possibility, and having solved prior art cannot adopt appearance to apply the defect of this anti-corrosion measure to castinplace pile.Its prefabricated reinforced concrete sleeve can factory batch production, prefabricated sleeve adopts the high performance concrete that meets requirement for anticorrosion, its match ratio will be done specialized designs according to corresponding standard, and the structure such as its protective layer thickness all need conscientiously design according to code requirement.The prefabricated reinforced concrete sleeve of finished product is directly transported to on-the-spot use, and the prefabricated reinforced concrete perimeter of sleeve of finished product does not need steel, greatly provides cost savings, and is that existing technical staff never expects, its effect is significant.
Cage of reinforcement comprises spaced longitudinal reinforcement, the outside configuration stirrup of longitudinal reinforcement.If desired, the external surface spray epoxy coating of longitudinal reinforcement.Longitudinal reinforcement in sleeve calculates configuration according to construction stage load.
The two ends up and down of sleeve are respectively equipped with pre-embedded steel slab, between neighbouring sleeve, by pre-embedded steel slab, connect.Every end of sleeve is at least provided with three pre-embedded steel slabs.While adopting prefabricate, cylinder section two ends are respectively embedded with steel plate, with bolts by pre-embedded steel slab between adjacent two sections of cylindrical shells.
Preferably, the lateral surface coating anti-rot material of sleeve, the ability corroding further to improve cylindrical shell opposing strong corrosive medium.
The lateral surface of sleeve is provided with suspension hook, for the lifting of prefabricated sleeve.
Prefabricated sleeve hoisting bracket (construction gadget) employing universal rod body or Bailey beam are assembled, and mid-stent need reserve is enough to allow prefabricated section of space of from top to bottom passing of sleeve.
Another object of the present invention is to provide the above-mentioned prefabricated sleeve-perfusion compound pile construction method of a kind of employing, comprises the steps:
(1) prefabricated reinforced concrete sleeve: determine steel concrete length sleeve, carry out sleeve design according to standard, integral body or prefabricate steel concrete sleeve;
(2) pore-forming and clear hole: according to engineering geological condition, adopt usual manner to carry out pore-forming and the work of clear hole;
(3) reinforcing bar cage hoisting, location: adopt usual manner to carry out lifting and the location of filling pile cage of reinforcement;
(4) prefabricated sleeve sinks in place: utilization is arranged at the falsework directly over position, hole, plays prefabricated reinforced concrete sleeve sections, and splice section by section, sink with bolt with wire rope suspensioning, accurately in place, and is fixed under falsework with wire rope;
(5) filling concrete: adopt conventional method to carry out the perfusion of pile concrete;
(6) falsework is removed: after cast-in-situ concrete final set, remove falsework and wire rope, reuse.
The anti-corrosion protection barrier of prefabricated reinforced concrete sleeve as deep-etching layer castinplace pile usingd in the present invention; the anticorrosion time limit of prefabricated sleeve can be controlled by its strict durability Design and durability addition thereto; anti-corrosion capability is reliable; can make inner cast-in-place pile concrete obtain permanent protection, eliminate durability and safety hidden danger that in strong corrosive environment, castinplace pile exists due to inadequate natural endowment.Prefabricated or the site prefabrication in batches of prefabricated reinforced concrete sleeve Ke of the present invention factory for prefabrication, the structure requirements such as the concrete quality of sleeve and protective layer thickness can be fully guaranteed; Sleeve on-site consolidation and convenience in place, technical maturity.In addition, utilizing steel concrete sleeve also to make to utilize the addition thereto such as coating anticorrosive paint further to improve pile body durability is achieved.
Accompanying drawing explanation
Fig. 1 is internal construction schematic diagram of the present invention;
Fig. 2 is sleeve schematic cross-sectional view of the present invention;
Fig. 3 is sleeve elevational schematic view of the present invention.
In figure: 1-sleeve; The weak corrosion layer of 2-; 3-longitudinal reinforcement; 4-stirrup; 5-pre-embedded steel slab; 6-suspension hook; 7-deep-etching layer.
The specific embodiment
As shown in Figure 1-Figure 3, the prefabricated sleeve-perfusion compound pile for strong corrosive environment of the present invention, comprises sleeve 1, sleeve 1 is precast concrete, configuration reinforcement skeleton in concrete, sleeve 1 is arranged in deep-etching layer 7, does not need to arrange precast concrete sleeve in weak corrosion layer 2.
Cage of reinforcement comprises spaced longitudinal reinforcement 3, the outside configuration stirrup 4 of longitudinal reinforcement 3.The two ends up and down of sleeve are respectively equipped with pre-embedded steel slab 5, and every end of sleeve 1 is provided with four pre-embedded steel slabs 5, between neighbouring sleeve, by pre-embedded steel slab 5, connects.The lateral surface of sleeve 1 is provided with suspension hook 6.The lateral surface coating anti-rot material of sleeve 1.The external surface spray epoxy coating of longitudinal reinforcement 3.Sleeve 1 is cylinder, sleeve 1 inner hollow and up/down perforation, and sleeve 1 is hollow-core construction.
Construction method, comprises the steps:
(1) prefabricated reinforced concrete sleeve: determine steel concrete length sleeve, carry out sleeve design according to standard, integral body or prefabricate steel concrete sleeve;
(2) pore-forming and clear hole: according to engineering geological condition, adopt usual manner to carry out pore-forming and the work of clear hole;
(3) reinforcing bar cage hoisting, location: adopt usual manner to carry out lifting and the location of filling pile cage of reinforcement;
(4) prefabricated sleeve sinks in place: utilization is arranged at the falsework directly over position, hole, plays prefabricated reinforced concrete sleeve sections, and splice section by section, sink with bolt with wire rope suspensioning, accurately in place, and is fixed under falsework with wire rope;
(5) filling concrete: adopt conventional method to carry out the perfusion of pile concrete;
(6) falsework is removed: after cast-in-situ concrete final set, remove falsework and wire rope, reuse.
Claims (9)
1. for prefabricated sleeve-perfusion compound pile of strong corrosive environment, it is characterized in that, comprise sleeve (1), sleeve (1) is arranged in deep-etching layer, and sleeve (1) is precast concrete, configuration reinforcement skeleton in concrete.
2. the prefabricated sleeve-perfusion compound pile for strong corrosive environment according to claim 1, is characterized in that, cage of reinforcement comprises spaced longitudinal reinforcement (3), the outside configuration stirrup (4) of longitudinal reinforcement (3).
3. the prefabricated sleeve-perfusion compound pile for strong corrosive environment according to claim 1 and 2, is characterized in that, the two ends up and down of sleeve (1) are respectively equipped with pre-embedded steel slab (5), between neighbouring sleeve (1), by pre-embedded steel slab (5), connects.
4. the two casing bored piles for deep-etching salinized soil according to claim 3, is characterized in that, every end of sleeve (1) is at least provided with three pre-embedded steel slabs (5).
5. the prefabricated sleeve-perfusion compound pile for strong corrosive environment according to claim 3, is characterized in that, the lateral surface of sleeve (1) is provided with suspension hook (6).
6. the prefabricated sleeve-perfusion compound pile for strong corrosive environment according to claim 3, is characterized in that the lateral surface coating anti-rot material of sleeve (1).
7. the prefabricated sleeve-perfusion compound pile for strong corrosive environment according to claim 3, is characterized in that the external surface spray epoxy coating of longitudinal reinforcement (3).
8. the prefabricated sleeve-perfusion compound pile for strong corrosive environment according to claim 3, is characterized in that, interior casing (1) inner hollow and up/down perforation, and interior casing (1) is cylinder.
9. the prefabricated sleeve-perfusion compound pile construction method described in the above-mentioned arbitrary claim of employing, is characterized in that, comprises the steps:
(1) prefabricated reinforced concrete sleeve: determine steel concrete length sleeve, carry out sleeve design according to standard, integral body or prefabricate steel concrete sleeve;
(2) pore-forming and clear hole: according to engineering geological condition, adopt usual manner to carry out pore-forming and the work of clear hole;
(3) reinforcing bar cage hoisting, location: adopt usual manner to carry out lifting and the location of filling pile cage of reinforcement;
(4) prefabricated sleeve sinks in place: utilization is arranged at the falsework directly over position, hole, plays prefabricated reinforced concrete sleeve sections, and splice section by section, sink with bolt with wire rope suspensioning, accurately in place, and is fixed under falsework with wire rope;
(5) filling concrete: adopt conventional method to carry out the perfusion of pile concrete;
(6) falsework is removed: after cast-in-situ concrete final set, remove falsework and wire rope, reuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410153568.7A CN103967006A (en) | 2014-04-16 | 2014-04-16 | Prefabricated sleeve and cast-in-place pile combination used for highly-corrosive environment and construction method thereof |
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| CN201410153568.7A CN103967006A (en) | 2014-04-16 | 2014-04-16 | Prefabricated sleeve and cast-in-place pile combination used for highly-corrosive environment and construction method thereof |
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| CN103967006A true CN103967006A (en) | 2014-08-06 |
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Cited By (5)
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| CN105666688A (en) * | 2016-03-30 | 2016-06-15 | 威海齐德新型建材有限公司 | Precast pile, pile body and production method |
| CN107558506A (en) * | 2017-08-20 | 2018-01-09 | 兰州大学 | A kind of new concrete anti-corrosion foundation pile and its construction technology |
| CN107620311A (en) * | 2017-09-25 | 2018-01-23 | 中国冶集团有限公司 | A kind of mud off pore-creating filling pile prevents the method that aperture casing sinks |
| CN108755675A (en) * | 2018-07-18 | 2018-11-06 | 中交第航务工程勘察设计院有限公司 | A kind of steel-pipe pile pile cover structure and the construction method for improving steel-pipe pile corrosion resistance |
| CN110029665A (en) * | 2019-05-27 | 2019-07-19 | 西安工业大学 | Resist the mini pile pile foundation and its construction method of the bad engineering characteristic of expansive soil foundation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105666688A (en) * | 2016-03-30 | 2016-06-15 | 威海齐德新型建材有限公司 | Precast pile, pile body and production method |
| CN105666688B (en) * | 2016-03-30 | 2017-10-31 | 威海齐德新型建材有限公司 | A kind of prefabricated pile, pile body and production method |
| CN107558506A (en) * | 2017-08-20 | 2018-01-09 | 兰州大学 | A kind of new concrete anti-corrosion foundation pile and its construction technology |
| CN107620311A (en) * | 2017-09-25 | 2018-01-23 | 中国冶集团有限公司 | A kind of mud off pore-creating filling pile prevents the method that aperture casing sinks |
| CN108755675A (en) * | 2018-07-18 | 2018-11-06 | 中交第航务工程勘察设计院有限公司 | A kind of steel-pipe pile pile cover structure and the construction method for improving steel-pipe pile corrosion resistance |
| CN110029665A (en) * | 2019-05-27 | 2019-07-19 | 西安工业大学 | Resist the mini pile pile foundation and its construction method of the bad engineering characteristic of expansive soil foundation |
| CN110029665B (en) * | 2019-05-27 | 2024-03-08 | 西安工业大学 | Miniature pile foundation for resisting bad engineering characteristics of expansive soil foundation and construction method thereof |
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Application publication date: 20140806 |