CN102900078A

CN102900078A - Anticorrosive preformed pile and manufacturing and constructing method thereof

Info

Publication number: CN102900078A
Application number: CN2011102219151A
Authority: CN
Inventors: 邹宗煊; 邹荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-26
Filing date: 2011-07-26
Publication date: 2013-01-30

Abstract

The invention discloses an anticorrosive preformed pile which is characterized in that pile links 0.5-25 cm greater than a pile body in diameter are arranged on the pile body of the preformed pile at intervals of 0.3 4 m; and the pile body is coated with waterproof asphalt, and 0.5-25cm thick sand or gravel is coated outside the waterproof asphalt. A manufacturing and constructing method of the anticorrosive preformed pile comprises the following steps of: binding a steel reinforcement cage and putting the steel reinforcement cage into a preformed pile template with the pile links, pouring concrete; after the desired strength of the concrete is achieved, spraying the waterproof asphalt to the pile body or lifting and putting the pile body into a holt melt asphalt tank to be soaked in the waterproof asphalt; lifting the pile body by a pile machine and standing the pile body in a pile position; heaping sand or gravel on the pile position; and piling or pressing the pile body into the soil so that the pile tip and the pile links on the pile body squeeze away the soil layer and the sand or the gravel, and then the soil, the sand or the gravel are conveniently filled around of the pile. The anticorrosive preformed pile and the steel reinforcement are prevented from being corroded by underground water; the bearing capability of the pile is improved, the drainage of stressed water in the soil layer is accelerated, the solidification of the soil around the pile is sped up, and the frictional force of the soil around the pile is improved; and the anticorrosive preformed pile is suitable for building foundation engineering in newly developed saline-alkali regions or new coastal reclamation regions in China.

Description

A kind of anti-corrosion precast pile and making job practices thereof

Technical field

The present invention relates to the building foundation field, relate in particular to a kind of anti-corrosion precast pile and make job practices.

Background technology

Along with China's urban construction scale constantly enlarges, the town site growing tension, the salt-soda soil development and use that many cities are had to famine is boundless and indistinct are perhaps reclaimed fields from the sea.In large stretch of salt-soda soil that China coast exists, contain SO in the underground water ₄ ^2-, CO ₂ ^-, HCO ₃, CL-has corrosivity to concrete and rebar.Such as 8 water samples of thermoelectric engineering place, newly developed area, the Bohai Sea, China Resources, Cangzhou, Hebei underground water, detect through monitoring water environment experimental center, Hebei province, in appraisal report (numbering HSB2009WJW066), claim, this place underground water pH value 5.70-6.93, slant acidity contains CL ^-142521.1-51052.3, contain SO ₄ ^2-13038.4-6047.1, be deep-etching to concrete structure, be weak corrosion to the reinforcing bar in the reinforced concrete structure, be moderate corrosion to steel work.

On, the Underwater Engineering new technology new results exchanging meeting underground at the national Second Committee that on June 1st, 2011 held in Tianjin; have R﹠D institution to think through several years trace detection: less expensive, effective measures are after the tubular pile concrete topping is brought up to 4cm by 3cm; bring up to 6cm, tubular pile concrete intensity is mentioned C80 by C60 again.This measure is than existing polyurethane or polyureas economy of smearing every square meter unit price 100-250 unit in preformed pile or pile tube outside, but this can only delay degree that concrete structure and reinforcing bar be corroded and prolong the time that is corroded, and can't stop concrete structure and reinforcing bar is corroded.

Summary of the invention

The invention provides a kind of anti-corrosion precast pile and make job practices, can prevent economical, effectively that the concrete and rebar of preformed pile from being corroded by underground water, the stress water that produces in the silt soil strata that piling is caused is discharged along all sand of stake or sandy gravel stratum, accelerated the dehydrating and curing of all mucky soils of stake, improve all native frictional resistances of stake, the bearing capacity of stake is increased substantially.

The technical solution adopted in the present invention is: a kind of anti-corrosion precast pile is the same with prior art, all include cross sections and be square or rectangle or circular long column shape steel concrete pile body, it is characterized in that, on the preformed pile pile body, every 0.3-4m pile section than the large 0.5-25cm of pile body diameter is arranged, the wide 0.5-25cm of pile section, pile section is provided with the longitudinal drainage hole, and the steel concrete pile body scribbles water proofing asphalt, and pitch has the thick sand of 0.5-25cm or gravel or fine grain building waste outward.

The making job practices of above-mentioned a kind of anti-corrosion precast pile is characterized in that may further comprise the steps successively:

1., the reinforcing cage in the colligation preformed pile;

2., the reinforcing cage that colligation is good is placed in the preformed pile template with pile section cast pile concrete and maintenance;

3., after concrete strength reaches, hang in to cross in the hot-melt asphalt groove at the pile body spray or with pile body and soak water proofing asphalt;

4., stand on the stake position the upper heap sand in stake position or gravel or fine grain building waste by the stake machine pile body of slinging;

5., pile body is squeezed into or is pressed in the soil by the stake machine, the pile top on the pile body, pile section are squeezed and are opened soil layer, and sand or gravel or fine grain building waste just filling guarantee that in stake week water proofing asphalt is not frayed when pile body enters soil layer.

A kind of anti-corrosion precast pile compared with prior art, has following remarkable advantage: can prevent economical, effectively that the concrete and rebar of preformed pile is not corroded by underground water, can also increase substantially the bearing capacity of preformed pile, stress water is discharged along all sand of stake or sandy gravel stratum in the silt soil strata that quickening piling causes, accelerated the curing of all mucky soils of stake, improve all native frictional resistances of stake, the present invention is applicable to China coast varieties in saline-alkali areas newly developed or newly reclaims fields from the sea the building foundation engineering in area.

The invention will be further described below in conjunction with accompanying drawing 1 and specific embodiment.

Description of drawings

Fig. 1 is embodiment of the invention schematic diagram.

Among the figure: 1. miscellaneous fill, 2. cushion cap, 3. pile body, 4. pile section, 5. drain hole, 6. layer of sand, 7. mud, 8. water proofing asphalt, 9. pile top, 10. argillic horizon, 11. polyureas.

The specific embodiment

Figure 1 shows that exemplary embodiments of the present invention, it is square long column shape steel concrete pile body (3) that a kind of anti-corrosion precast pile includes cross sections, and every 2m pile section (4) than the large 10cm of pile body (3) is arranged pile body (3) is upper, the wide 10cm of pile section (4), pile section (4) is provided with longitudinal drainage hole (5), scribble pitch (8) on pile body (3) and the pile section (4), pitch (8) is outer the thick back-up sand of 10cm (6), and pile top (9) surface scribbles polyureas (11).

Below brief description embodiment makes construction sequence:

1., the reinforcing cage in the colligation preformed pile;

2., the template of mounting strap pile section (4) and pour into a mould pile body (3) concrete and maintenance;

3., after concrete strength reaches, pile body (3) hung in to cross in the hot-melt asphalt groove soak water proofing asphalt;

4., stand on the stake position the upper heap sand in stake position by the stake machine pile body (3) of slinging;

5., by the stake machine pile body (3) is squeezed into soil layer (1,7,10) in, during pile section (4) on the pile body (3) is buried sand (6) band, pile body (3) periphery of filling between pile section (4), reaching water proofing asphalt (8) is not worn when pile body (3) enters soil layer (1,7,10).Namely finish the making construction of an anti-corrosion precast pile, go round and begin again, finish the construction of all anti-corrosion precast piles.

Claims

1. an anti-corrosion precast pile is the same with prior art, all include cross sections and be square or rectangle or circular long column shape steel concrete pile body, it is characterized in that, on the preformed pile pile body, every 0.3-4m pile section than the large 0.5-25cm of pile body diameter is arranged, the wide 0.5-25cm of pile section, pile section is provided with the longitudinal drainage hole, and the steel concrete pile body scribbles water proofing asphalt, and pitch has the thick sand of 0.5-25cm or gravel or fine grain building waste outward.

2. the making job practices of an anti-corrosion precast pile is characterized in that may further comprise the steps successively:

1., the reinforcing cage in the colligation preformed pile;

5., pile body is squeezed into or is pressed in the soil by the stake machine, the pile top on the pile body, pile section are squeezed and are opened soil layer, sand or gravel or fine grain building waste just filling in stake week.