CN108517900A - A kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation - Google Patents

A kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation Download PDF

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Publication number
CN108517900A
CN108517900A CN201810247582.1A CN201810247582A CN108517900A CN 108517900 A CN108517900 A CN 108517900A CN 201810247582 A CN201810247582 A CN 201810247582A CN 108517900 A CN108517900 A CN 108517900A
Authority
CN
China
Prior art keywords
pile foundation
foundation
corrosion
density polyethylene
concrete pile
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.)
Pending
Application number
CN201810247582.1A
Other languages
Chinese (zh)
Inventor
汪春凤
李志宏
李承印
杨晶
金浩
王泉
雷清然
鄂天龙
张富平
刘钊
李伟
冯扬州
祖金龙
王帆
吕旭东
王泷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Gansu Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Gansu Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Gansu Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Gansu Electric Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Gansu Electric Power Co Ltd, Economic and Technological Research Institute of State Grid Gansu Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201810247582.1A priority Critical patent/CN108517900A/en
Publication of CN108517900A publication Critical patent/CN108517900A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/06Protective 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 corrosion by soil or water
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/60Piles with protecting cases
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0004Synthetics
    • E02D2300/0006Plastics
    • E02D2300/0009PE

Abstract

The invention discloses a kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation, the method is the high density polyethylene pipe being arranged on the outside of deposited reinforced concrete pile basis for deposited reinforced concrete pile basis and the corrosivity soil body to be isolated.Protection cylinder of this method using high density polyethylene pipe as bored concrete pile foundation; anti-corrosion cloth bag is solved as existing risk problem during existing complicated, the of high cost and use of constructing of pile foundation protection layer; the extra-strong corrosion resistant permeability resistance of high density polyethylene pipe can guarantee the service life 50 years or more of pile foundation; by testing inspection pile foundation mechanical property better than original-pack native pile foundation; excellent corrosion resistance, easy construction, can be in fields extensive uses such as high-tension line concrete foundation from now on, bridge foundation, civil building bases.

Description

A kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation
Technical field
The invention belongs to be directed to be located in bored concrete pile foundation technical field of construction in the stronger salinized soil of corrosivity, and in particular to A kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation.
Background technology
When passing through saline soil area, gene basis is in semiarid and damp on the high-voltage transmission line towers basis of construction plan It is dispersed with the higher salt and alkali component of concentration in wet soil, is rich in sodium chloride and sodium sulphate in solonchak, both salts are gathered in Upper soll layer forms white salt incrustation.Soluble-salt is rich in alkaline earth, rare solid column structure is rich in sodium carbonate, in strong Alkalinity, since the presence of the substance has in various degree reinforced concrete foundation exposed soil body part in transmission line of electricity part in operation Corrosion phenomenon, the more serious service life for having influenced basis.Carry out to saline soil area underwater cast-in-place pile concrete basis Aseptic technic and outer casing pipe protection solution technique research, the durability for improving reinforced concrete foundation be work transmission line urgently The key technology of solution.
Investigation and analysis, some industries of the country are for being located in the stronger underwater grouting pile foundation of corrosivity at present, using with High-impermeable waterproof, high intensity, cloth bag made of wear-resistant good geosynthetics synthetic material, principle are:After basic pore-forming Cloth bag is put into foundation pit, after injection mud makes cloth bag spread apart into cloth bag, is put into reinforcement foundation cage and casting concrete, So that the film of one layer of fiber cloth bag isolation harmful components is added between basis and the corrosivity soil body, concrete foundation is protected not had Evil ingredient corrodes.
Defect mainly has several points existing for the technology:
1. anti-corrosion cloth bag is a kind of woven fabric and compound thin film, material aging journey in stronger soda acid salt environment Degree and service life do not have engineering experience, impervious to its after this material is poured into concrete foundation, corrosion resistance index mesh The preceding country lacks effective detection means, and the service life of the material cannot be with 50 years concrete foundation projected lives index phase Match, there are certain barrier propterty risks.
2. anti-corrosion cloth bag construction technology is complex, i.e.,:Under water after bored concrete pile foundation pore-forming, cloth bag bottom must be bound The dregs for inserting certain counterweight in cloth bag afterwards is called in tens of meters of cloth bag in datum hole using crane.In the upper end of cloth bag Slime water is injected at top, is strutted cloth bag using mud water pressure after being adjacent to foundation pit inner wall, by reinforcement foundation cage hang in hole into Row concreting.There are main problems to be for the technique:(1) during placing reinforcement foundation cage, cloth bag is easily by steel reinforcement cage Scraping collision causes cloth bag to be pierced, and is not easy to be noticeable and hunt leak.(2) it inserts a certain amount of dregs in advance in cloth bag and does counterweight, Dregs is deposited in pile foundation bottom with certain thickness sediment is reformed in concreting, and pile foundation foundation bearing capacity is caused to change Become, easily leads to pile foundation sedimentation.
3. different geological conditions is directed to, under water from lifting cloth bag to installation steel reinforcement cage after-pouring coagulation after basic pore-forming Time required for during soil is longer, and stake holes undergauge, collapse hole situation easily occur when geological conditions is poor under water, once there is this Class problem steel reinforcement cage can not be installed in place, or installed protection of steel bar gabion layer thickness and cannot effectively be controlled, and pile foundation ontology is influenced Quality causes working efficiency to reduce and apply once undergauge or collapse hole occur will cause to scrap the redrilling again of foundation pit and cloth bag Work cost increases.
4. changing entire stake due to increasing fiber cloth bag between bored concrete pile foundation reinforced concrete structure and basic hole wall Side friction coefficient between body and the soil body, reduces the frictional resistance between bored concrete pile foundation and the soil body, reduces the mechanical property of pile foundation Can, the effect of hachure pile foundation plays, and hidden danger is left to engineering.
Invention content
The purpose of the invention is to overcome drawbacks described above, a kind of saline soil area transmission line of electricity bored concrete pile foundation is provided Anti-corrosion method.
The purpose of the present invention implements by the following technical programs:
A kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation, the method are to be perfused in armored concrete High density polyethylene pipe for deposited reinforced concrete pile basis and the corrosivity soil body to be isolated is set on the outside of pile foundation.
Further, the high density polyethylene pipe is double wall corrugated high-density polyethylene pipes.
Further, the wall thickness of the high density polyethylene pipe is in 50mm or more.
Further, the method is specially:After foundation pit pore-forming, high density polyethylene pipe lifting is entered into foundation pit, then Reinforcing bar cage hoisting is entered in high density polyethylene pipe, casting concrete forms bored concrete pile foundation, finally to high density polyethylene (HDPE) Surrounding carries out slip casing by pressure on the outside of pipe.
Bored concrete pile foundation under the saline soil area corrosive water of the present invention, using high density polyethylene double-wall corrugated pipe As novel anticorrosion technology, emphasis solves cloth bag and wraps up in deficiency present in body technique, provides one kind and wrapping up in body concrete perfusion The anticorrosion technology of stake.High density polyethylene double-wall corrugated pipe has that high mechanical strength, integral rigidity are strong, can replace shield Cylinder has the advantages that superpower corrosion resistance and service life are more than 50 years, utilizes high density polyethylene (HDPE) pair without separately doing casing It is anticorrosive, resistance to that the effect of wall bellows " isolation isolation and anti-leakage " reaches foundation of concrete perfusion piles under solution salinized soil environment The problem of long property and foundation bearing capacity, engineering design service life is effectively ensured.
The invention has the advantages that:
The anti-corrosion method of transmission line of electricity bored concrete pile foundation in saline soil area provided by the invention, is made with high density polyethylene pipe For the protection cylinder of bored concrete pile foundation, solves anti-corrosion cloth bag as existing complicated, the of high cost and use of constructing of pile foundation protection layer The extra-strong corrosion resistant permeability resistance of existing risk problem in the process, high density polyethylene pipe can guarantee the service life 50 of pile foundation Year or more, by testing inspection pile foundation mechanical property better than original-pack native pile foundation, excellent corrosion resistance, easy construction, Neng Gou The fields extensive use such as high-tension line concrete foundation, bridge foundation, civil building basis from now on.
Description of the drawings
Fig. 1 is double wall corrugated high-density polyethylene pipes stake anti-pulling capacity test result curve graph.
Fig. 2 is the anti-corrosion method schematic diagram of bored concrete pile foundation of the present invention.
Specific implementation mode
For more prominent the objectives, technical solutions, and advantages of the present invention, with the following Examples, to the present invention into traveling One step illustrates, but does not therefore limit the present invention within scope of embodiments.
A kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation, on the outside of deposited reinforced concrete pile basis High density polyethylene pipe for deposited reinforced concrete pile basis and the corrosivity soil body to be isolated is set.
Preferably, high density polyethylene pipe is double wall corrugated high-density polyethylene pipes, thickness of pipe wall is in 50mm or more.
In conjunction with Fig. 2, this method is specially:After foundation pit pore-forming, high density polyethylene pipe lifting is entered into foundation pit, then by steel Muscle cage lifting enter high density polyethylene pipe in, casting concrete formed bored concrete pile foundation, finally to high density polyethylene pipe outside Side surrounding carries out slip casing by pressure.
The anti-corrosion method of the saline soil area transmission line of electricity bored concrete pile foundation of the present invention has the following advantages:(1) using high Density polyethylene HDPE double-wall corrugated pipes substitute geotechnological anti-corrosion cloth bag, and corrugated pipe products itself have certain rigidity, not variable Shape can play the role of casing under water after pouring pile hole, prevent foundation pit from collapsing and undergauge;Bellows inner wall smooth pours coagulation Good fluidity can guarantee the density of concreting when native, can effectively control reinforcement foundation cage protection interlamellar spacing, can have Effect avoids the defects of pile body work progress.(2) high density polyethylene double-wall corrugated pipe is utilized to substitute geotechnological anti-corrosion cloth bag, Bellows itself has superpower antiseptic property, is not corroded in 50 years, and own mechanical intensity is high, 50 millimeters of wall thickness or more, Corrosive ion infiltration problem will not be not present by steel reinforcement cage scraping collision and puncture in the process by installing reinforcing bar, also have good heat Stability, closure is excellent, completely cuts off steam.(3) market purchasing of high density polyethylene double-wall corrugated pipe is convenient, live basis Directly lifting enters foundation pit after foundation depth is welded, and construction time short operation is simple, professional technique guidance is not needed, in wave Bottom is underwater using steel reinforcement cage progress is hung in after a certain amount of thickness progress back cover of concreting after line pipe is put into designed elevation It pours, there is no loading dregs to do counterweight, can guarantee that pile foundation foundation bearing capacity is constant.(4) high density polyethylene double-walled wave Line pipe substitutes geotechnological anticorrosion cloth and wraps up in body, and on basis, completion utilizes the PVC grouting pipes for being preset in ripple pipe outer wall surrounding after pouring Slip casing by pressure is carried out, the gap of bellows surrounding and stake holes is filled with concrete slurry and ensures that bellows and foundation pit hole wall are closed Increase basic frictional force.
The parameter for wrapping up in body bored concrete pile foundation anti-corrosion method and geotextiles anti-corrosion method of the present invention is relatively shown in Table 1.
1 double wall corrugated high-density polyethylene pipes of table are compared with geotextiles anti-corrosion
By table 1 as it can be seen that the method for the present invention has the advantages that easy for construction, at low cost, anticorrosion ability is strong.
High density polyethylene double-wall corrugated pipe protection bored concrete pile foundation anti-pulling test data are shown in Table 2.
2 double wall corrugated high-density polyethylene pipes of table protect bored concrete pile foundation anti-pulling test data
Load (kN) 0 500 750 1000 1250
This grade settles (mm) 0.00 6.63 6.32 8.99 77.10
Accumulative sedimentation (mm) 0.00 6.63 12.95 21.94 99.04
It is proved by unit for single-pile vertical anti-pulling static load test, bellows is applied to anti-uplift force and site soil layers after pile foundation Side resistance value is close, and will not be adversely affected to pile bearing capacity.The present invention method at home first Application in extra-high voltage Transmission line of electricity concrete foundation is constructed, in circuit concrete foundation from now on, bridge foundation, the underwater filling in building field corrosivity area Note pile foundation is with a wide range of applications.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although with reference to aforementioned reality Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation Technical solution recorded in example is modified or equivalent replacement of some of the technical features.All essences in the present invention With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.

Claims (4)

1. a kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation, which is characterized in that the method is in reinforcing bar High-density polyethylene for deposited reinforced concrete pile basis and the corrosivity soil body to be isolated is set on the outside of foundation of concrete perfusion piles Alkene pipe.
2. the anti-corrosion method of transmission line of electricity bored concrete pile foundation in saline soil area according to claim 1, which is characterized in that institute It is double wall corrugated high-density polyethylene pipes to state high density polyethylene pipe.
3. the anti-corrosion method of transmission line of electricity bored concrete pile foundation in saline soil area according to claim 1 or 2, feature exist In the wall thickness of the high density polyethylene pipe is in 50mm or more.
4. the anti-corrosion method of transmission line of electricity bored concrete pile foundation in saline soil area according to claim 1, which is characterized in that institute The method of stating is specially:After foundation pit pore-forming, high density polyethylene pipe lifting is entered into foundation pit, is then entered reinforcing bar cage hoisting highly dense It spends in polyethylene pipe, casting concrete forms bored concrete pile foundation, finally carries out pressure note to surrounding on the outside of high density polyethylene pipe Slurry.
CN201810247582.1A 2018-03-23 2018-03-23 A kind of anti-corrosion method of saline soil area transmission line of electricity bored concrete pile foundation Pending CN108517900A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110409423A (en) * 2019-07-30 2019-11-05 南京新核复合材料有限公司 A kind of ocean engineering squeezes into tubular pole with fibre-reinforced plastics

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051285A (en) * 1988-07-29 1991-09-24 Pillard Products, Inc. Plastic piling
KR100397276B1 (en) * 2001-03-13 2003-09-17 디엠상역 주식회사 Anticorrosive structure of pipelines and treating method against corrosion
CN2795602Y (en) * 2005-04-15 2006-07-12 金德管业集团有限公司 Double wall corrugated pipe for coal mine
CN101532290A (en) * 2009-02-25 2009-09-16 河海大学 Granule grouting pile of ripple plastic sleeve with hole for strengthening soft soil foundation and strengthening method
CN101614020B (en) * 2009-07-16 2012-05-02 中国京冶工程技术有限公司 Flexible bladder type anticorrosion device, anticorrosion pile and construction method using same
CN102875875A (en) * 2012-09-28 2013-01-16 中国石油天然气集团公司 Outer-layer protecting sleeve of three-layer protecting system of marine steel-pipe pile and manufacture method of outer-layer protecting sleeve
CN105421448A (en) * 2015-12-22 2016-03-23 钱俊 Pile splicing structure and process of prefabricated pipe pile made of double-wall corrugated pipe

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051285A (en) * 1988-07-29 1991-09-24 Pillard Products, Inc. Plastic piling
KR100397276B1 (en) * 2001-03-13 2003-09-17 디엠상역 주식회사 Anticorrosive structure of pipelines and treating method against corrosion
CN2795602Y (en) * 2005-04-15 2006-07-12 金德管业集团有限公司 Double wall corrugated pipe for coal mine
CN101532290A (en) * 2009-02-25 2009-09-16 河海大学 Granule grouting pile of ripple plastic sleeve with hole for strengthening soft soil foundation and strengthening method
CN101614020B (en) * 2009-07-16 2012-05-02 中国京冶工程技术有限公司 Flexible bladder type anticorrosion device, anticorrosion pile and construction method using same
CN102875875A (en) * 2012-09-28 2013-01-16 中国石油天然气集团公司 Outer-layer protecting sleeve of three-layer protecting system of marine steel-pipe pile and manufacture method of outer-layer protecting sleeve
CN105421448A (en) * 2015-12-22 2016-03-23 钱俊 Pile splicing structure and process of prefabricated pipe pile made of double-wall corrugated pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110409423A (en) * 2019-07-30 2019-11-05 南京新核复合材料有限公司 A kind of ocean engineering squeezes into tubular pole with fibre-reinforced plastics

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Application publication date: 20180911