CN112144589A - Construction method for reinforcing steel pipe pile pier by underwater glass fiber sleeve - Google Patents
Construction method for reinforcing steel pipe pile pier by underwater glass fiber sleeve Download PDFInfo
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- CN112144589A CN112144589A CN202011080604.3A CN202011080604A CN112144589A CN 112144589 A CN112144589 A CN 112144589A CN 202011080604 A CN202011080604 A CN 202011080604A CN 112144589 A CN112144589 A CN 112144589A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
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Abstract
The invention discloses a construction method of an underwater glass fiber sleeve reinforced steel pipe pile pier, which comprises the following steps: manufacturing a glass fiber sleeve; coating an antirust agent on a corroded area of the steel pipe pile pier stud; and (3) welding the stud: installing a glass fiber sleeve: sealing the cylinder opening: pumping self-compacting high-strength cement: reinforcing the glass fiber sleeve: by adopting the method, secondary repair is not needed, and the later maintenance cost is saved. Typically, the reinforced structure can extend the useful life of at least 50 years.
Description
Technical Field
The invention relates to a method for reinforcing steel pipe piers in ports, bridges and coastal engineering, in particular to a construction method for reinforcing the steel pipe piers by using underwater glass fiber sleeves.
Background
The steel pipe in the steel pipe pile foundation is extremely easy to be corroded in a water flow environment, particularly in a splash zone and a water level change zone, and reinforcement and repair measures need to be taken in time.
At present, the commonly used steel pipe pile pier reinforcing method is as follows: firstly, performing cold bending processing on a prefabricated steel plate to form an outer-wrapped steel casing; welding the reinforcing steel bar on the weak part of the pile pier for reinforcement; then, the glass fiber sleeve is used for carrying out anticorrosion packaging, and epoxy grouting material is filled in the gap. Because of the low maintenance cost and the success of the method, the technology is mature after being used for a long time.
However, the engineering practical experience of a large number of steel pipe pile piers at home and abroad shows that although the reinforcing method can prolong the service life of the structure to a certain extent, some problems still exist. For example:
(1) the sealing of the device is poor. Because the construction condition is abominable, the epoxy grouting material probably has the phenomenon of filling inhomogeneously, and after the sea water is soaked in the steel-pipe pile, still can corrode inside steel casing, causes the loss of intensity, and the reinforcement effect is not good enough.
(2) The construction is complicated and the difficulty is high. Needs to carry out multi-point welding and underwater welding, has small construction operation surface and causes certain difficulty in maintenance.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a construction method for reinforcing a steel pipe pile pier by using an underwater glass fiber sleeve.
The invention discloses a construction method for reinforcing a steel pipe pile pier by an underwater glass fiber sleeve, which comprises the following steps:
step one, construction preparation:
manufacturing a glass fiber sleeve;
step two, surface cleaning:
cleaning the surface of a corroded area of the steel pipe pile pier stud, and then smearing an antirust agent;
step three, welding the studs:
respectively extending the upper end and the lower end of the corroded area of the steel pipe pile pier by 45-50cm, and welding a plurality of stainless steel studs along the radial direction of the steel pipe pile pier stud;
step four, installing the glass fiber sleeve:
sleeving a prefabricated glass fiber sleeve outside a plurality of stainless steel studs, enabling the middle position of the glass fiber sleeve in the height direction to be consistent with the middle position of the corroded area in the height direction, and simultaneously coating basalt fiber grid ribs on the outer wall of the glass fiber sleeve; the upper and lower ports of the glass fiber sleeve are hooped and fixed on the steel pipe pile pier stud by using a fiber fastening belt; then, stainless steel self-tapping screws are used for penetrating through basalt fiber grid ribs and the joint of the glass fiber sleeve and the steel pipe pile pier stud, and are screwed into the steel pipe pile pier stud for fastening;
step five, sealing the cylinder opening:
injecting epoxy resin sealing glue into the upper and lower ports of the joint of the glass fiber sleeve and the steel pipe pile pier stud, and waiting for at least 30min to fully cure the epoxy resin sealing glue and finish the sealing treatment of the opening of the glass fiber sleeve;
pumping self-compacting high-strength cement:
pumping self-compacting high-strength cement into the glass fiber sleeve from a grouting hole formed in the bottom of the glass fiber sleeve by using a cement conveying pump until the self-compacting high-strength cement flows out from a slurry outlet formed in the top of the glass fiber sleeve, and completely discharging seawater at the moment;
step seven, reinforcing the glass fiber sleeve:
after 1-2h, the self-compacting high-strength cement in the glass fiber sleeve starts to be initially set, and carbon fiber impregnating adhesive is coated on the outer wall of the glass fiber sleeve in a rolling manner, wherein the coating range is the position corresponding to the corroded area and the position corresponding to the upper end and the lower end of the corroded area, which are respectively extended by 45-50 cm; then, winding a layer of carbon fiber cloth along the smearing area and repeatedly rolling the carbon fiber cloth along the fiber direction of the carbon fiber cloth by using a roller to ensure that all air bubbles are discharged, so that the carbon fiber cloth is soaked by the carbon fiber impregnating compound; and finally, uniformly coating a layer of surface adhesive on the surface of the carbon fiber cloth.
The invention has the following advantages:
(1) the invention has wide application range, can be applied to seawater, fresh water and other corrosive water quality, and can simultaneously carry out underwater and overwater reinforcement and repair on corroded areas.
(2) After the method is used for reinforcing the steel pipe pile pier, the reinforcing and supporting of the weak part of the steel pipe pile pier can be realized, the weakness that steel is needed in the prior art is avoided, the advantage that the glass fiber sleeve is good in corrosion resistance in a water flow environment is fully exerted, and the reinforcing effect is obvious.
(3) The construction process is simple, the operation difficulty is low, large-scale equipment does not need to be erected, and the defects that the existing reinforcement technology needs multi-point welding and underwater welding are overcome; and the construction period is short, and the influence on the use function of the structure is effectively reduced.
(4) The anti-corrosion and durability design requirements of the structure can be met through once construction and repair, secondary repair is not needed, and the later maintenance cost is saved. Typically, the reinforced structure can extend the useful life of at least 50 years.
Drawings
FIG. 1 is a schematic structural diagram of a construction method for reinforcing a steel pipe pile pier by an underwater glass fiber sleeve according to the invention;
fig. 2 is a cross-sectional view of 1-1 of the structure shown in fig. 1.
Detailed Description
The following embodiments are provided to illustrate the present invention, but are not intended to limit the scope of the present invention.
As shown in the attached drawings, the construction method for reinforcing the steel pipe pile pier by the underwater glass fiber sleeve comprises the following steps:
step one, construction preparation: manufacturing a glass fiber sleeve, wherein the preferred thickness of the glass fiber sleeve is 2-4 mm, so that the difficulty in subsequent construction caused by overlarge thickness is avoided; the relation between the height H of the glass fiber sleeve and the height H of the corroded area is as follows: h + (90-100) cm; the preferable glass fiber sleeve is made of a modified resin material (commercially available) doped with high-strength fibers, and has high strength and good corrosion resistance.
Step two, surface cleaning:
carrying out surface treatment on the corroded area 1 of the steel pipe pile pier stud by using a grinding machine or a high-pressure water gun, wherein the surface treatment comprises the steps of removing rust on the surface of a steel pipe and cleaning aquatic organisms, debris and residues and the like attached to the surface; then, coating an antirust agent;
step three, welding the studs:
in the corroded area of the steel pipe pile pier and the upper end and the lower end of the corroded area, the lengths are respectively increased within the range of 45-50cm (such as 45cm, 48cm and 50cm), a plurality of stainless steel studs 2 are welded along the radial direction of the steel pipe pile pier column, and the distance between two adjacent studs is preferably 10-15cm (such as 10cm, 12cm and 15cm), so that the supporting and reinforcing of the corroded area of the steel pipe pile pier can be ensured, and meanwhile, the supporting effect of a glass fiber sleeve can be achieved;
step four, installing the glass fiber sleeve:
sleeving a prefabricated glass fiber sleeve 3 outside a plurality of stainless steel studs 2, enabling the middle position of the glass fiber sleeve 3 in the height direction to be consistent with the middle position of the corroded area in the height direction, and meanwhile, coating basalt fiber grid ribs 6 on the outer wall of the glass fiber sleeve to ensure that the cylinder wall has enough rigidity and does not generate excessive deformation; the upper and lower ports of the glass fiber sleeve are hooped and fixed on the steel pipe pile pier stud by using a fiber fastening belt 4; then, stainless steel self-tapping screws are used for penetrating through basalt fiber mesh bars and the joints of the glass fiber sleeves and the steel pipe pile pier columns, and the steel pipe pile pier columns are screwed in for fastening. The distance between two adjacent screws is preferably 15cm, so that the glass fiber sleeve is tightly and firmly butted, and the scattering caused by the scouring of sea waves is prevented;
step five, sealing the cylinder opening:
and injecting epoxy resin sealing glue 10 into the upper and lower ports of the joint of the glass fiber sleeve and the steel pipe pile pier stud, and waiting for at least 30min to fully cure the epoxy resin sealing glue and finish the sealing treatment of the opening of the glass fiber sleeve.
Pumping self-compacting high-strength cement:
use cement delivery pump machine, with self-compaction high strength cement 9 from opening in the slip casting hole 7 pump sending of glass fiber sleeve bottom to glass fiber sleeve in, until self-compaction high strength cement from opening the play thick liquid mouth 8 outflow at glass fiber sleeve top, the sea water is all arranged to the greatest extent this moment. The preferred cement strength grade is 52.5#, and the cement has good waterproof and corrosion-resistant performances and remarkable ageing resistance.
Step seven, reinforcing the glass fiber sleeve:
after 1-2h, the self-compacting high-strength cement in the glass fiber sleeve starts to be initially set, and carbon fiber impregnating adhesive is coated on the outer wall of the glass fiber sleeve in a rolling way, wherein the coating range is the position corresponding to the corroded area and the position corresponding to the position where the upper end and the lower end of the corroded area are respectively extended by 45-50cm (such as 45cm, 48cm and 50 cm); then, winding a layer of carbon fiber cloth 5 along the smearing area and repeatedly rolling the carbon fiber cloth along the fiber direction of the carbon fiber cloth by using a roller to ensure that all air bubbles are discharged, so that the carbon fiber impregnated glue permeates the carbon fiber cloth; and finally, uniformly coating a layer of surface adhesive on the surface of the carbon fiber cloth, wherein the preferable surface adhesive is modified epoxy structural adhesive, so that the overall sealing quality is ensured, and the glass fiber sleeve is reinforced.
The above-described flow is only a preferred embodiment of the present invention, and is intended to facilitate the better understanding and application of the present invention by those skilled in the art, and is not intended to limit the present invention. Other modifications and variations to the present invention may be apparent to those skilled in the art, and it is, therefore, desired to be secured in the appended claims all such modifications and substitutions as fall within the true spirit and scope of the invention.
Claims (7)
1. A construction method for reinforcing a steel pipe pile pier by an underwater glass fiber sleeve is characterized by comprising the following steps:
step one, construction preparation:
manufacturing a glass fiber sleeve;
step two, surface cleaning:
cleaning the surface of a corroded area of the steel pipe pile pier stud, and then smearing an antirust agent;
step three, welding the studs:
respectively extending the upper end and the lower end of the corroded area of the steel pipe pile pier by 45-50cm, and welding a plurality of stainless steel studs along the radial direction of the steel pipe pile pier stud;
step four, installing the glass fiber sleeve:
sleeving a prefabricated glass fiber sleeve outside a plurality of stainless steel studs, enabling the middle position of the glass fiber sleeve in the height direction to be consistent with the middle position of the corroded area in the height direction, and simultaneously coating basalt fiber grid ribs on the outer wall of the glass fiber sleeve; the upper and lower ports of the glass fiber sleeve are hooped and fixed on the steel pipe pile pier stud by using a fiber fastening belt; then, stainless steel self-tapping screws are used for penetrating through basalt fiber grid ribs and the joint of the glass fiber sleeve and the steel pipe pile pier stud, and are screwed into the steel pipe pile pier stud for fastening;
step five, sealing the cylinder opening:
injecting epoxy resin sealing glue into the upper and lower ports of the joint of the glass fiber sleeve and the steel pipe pile pier stud, and waiting for at least 30min to fully cure the epoxy resin sealing glue and finish the sealing treatment of the opening of the glass fiber sleeve;
pumping self-compacting high-strength cement:
pumping self-compacting high-strength cement into the glass fiber sleeve from a grouting hole formed in the bottom of the glass fiber sleeve by using a cement conveying pump until the self-compacting high-strength cement flows out from a slurry outlet formed in the top of the glass fiber sleeve, and completely discharging seawater at the moment;
step seven, reinforcing the glass fiber sleeve:
after 1-2h, the self-compacting high-strength cement in the glass fiber sleeve starts to be initially set, and carbon fiber impregnating adhesive is coated on the outer wall of the glass fiber sleeve in a rolling manner, wherein the coating range is the position corresponding to the corroded area and the position corresponding to the upper end and the lower end of the corroded area, which are respectively extended by 45-50 cm; then, winding a layer of carbon fiber cloth along the smearing area and repeatedly rolling the carbon fiber cloth along the fiber direction of the carbon fiber cloth by using a roller to ensure that all air bubbles are discharged, so that the carbon fiber cloth is soaked by the carbon fiber impregnating compound; and finally, uniformly coating a layer of surface adhesive on the surface of the carbon fiber cloth.
2. The construction method of the underwater steel pipe pier reinforced by the glass fiber sleeve according to claim 1, wherein the construction method comprises the following steps: the thickness of the glass fiber sleeve is 2mm-4mm, and the relation between the height H of the glass fiber sleeve and the height H of the corroded area is as follows: h + (90-100) cm.
3. The construction method of the underwater steel pipe pier reinforced by the glass fiber sleeve according to claim 1 or 2, wherein: the glass fiber sleeve is made of a modified resin material doped with high-strength fibers.
4. The construction method of the underwater steel pipe pier reinforced by the glass fiber sleeve according to claim 3, wherein the construction method comprises the following steps: the distance between two adjacent pegs is 10-15 cm.
5. The construction method of the underwater steel pipe pier reinforced by the glass fiber sleeve according to claim 4, wherein the construction method comprises the following steps: the distance between two adjacent screws is 15 cm.
6. The construction method of the underwater steel pipe pier reinforced by the glass fiber sleeve according to claim 5, wherein the construction method comprises the following steps: the strength grade of the cement is 52.5 #.
7. The construction method of the underwater steel pipe pier reinforced by the glass fiber sleeve according to claim 6, wherein the construction method comprises the following steps: the surface adhesive is modified epoxy structural adhesive.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011080604.3A CN112144589A (en) | 2020-10-10 | 2020-10-10 | Construction method for reinforcing steel pipe pile pier by underwater glass fiber sleeve |
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| CN202011080604.3A CN112144589A (en) | 2020-10-10 | 2020-10-10 | Construction method for reinforcing steel pipe pile pier by underwater glass fiber sleeve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026837A (en) * | 2021-03-19 | 2021-06-25 | 哈尔滨工业大学 | Restoration, reinforcement and anticorrosion construction method for port RC pile foundation in alpine region |
| CN114855898A (en) * | 2022-04-27 | 2022-08-05 | 中交第三航务工程局有限公司 | Structure for reinforcing wharf pile foundation by adopting basalt fiber sleeve and construction method |
| CN115075311A (en) * | 2022-04-27 | 2022-09-20 | 中交第三航务工程局有限公司 | Structure for reinforcing and repairing wharf pile foundation by comprehensively adopting basalt fibers and construction method |
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| US20140027306A1 (en) * | 2012-07-30 | 2014-01-30 | David Whitmore | Cathodic Protection of a Concrete Structure |
| CN103669899A (en) * | 2013-11-27 | 2014-03-26 | 湖州盛基金属制品有限公司 | Method for constructing concrete reinforced by carbon fiber cloth |
| CN104675141A (en) * | 2015-03-19 | 2015-06-03 | 东南大学 | FRP (Fiber Reinforced Plastic) pipe confined cement based composite material reinforced pier column structure |
| CN105507315A (en) * | 2015-12-16 | 2016-04-20 | 武汉南方旭域科技工程有限公司 | Damage repair process for underground pier stud |
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2020
- 2020-10-10 CN CN202011080604.3A patent/CN112144589A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140027306A1 (en) * | 2012-07-30 | 2014-01-30 | David Whitmore | Cathodic Protection of a Concrete Structure |
| CN103669899A (en) * | 2013-11-27 | 2014-03-26 | 湖州盛基金属制品有限公司 | Method for constructing concrete reinforced by carbon fiber cloth |
| CN104675141A (en) * | 2015-03-19 | 2015-06-03 | 东南大学 | FRP (Fiber Reinforced Plastic) pipe confined cement based composite material reinforced pier column structure |
| CN105507315A (en) * | 2015-12-16 | 2016-04-20 | 武汉南方旭域科技工程有限公司 | Damage repair process for underground pier stud |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113026837A (en) * | 2021-03-19 | 2021-06-25 | 哈尔滨工业大学 | Restoration, reinforcement and anticorrosion construction method for port RC pile foundation in alpine region |
| CN114855898A (en) * | 2022-04-27 | 2022-08-05 | 中交第三航务工程局有限公司 | Structure for reinforcing wharf pile foundation by adopting basalt fiber sleeve and construction method |
| CN115075311A (en) * | 2022-04-27 | 2022-09-20 | 中交第三航务工程局有限公司 | Structure for reinforcing and repairing wharf pile foundation by comprehensively adopting basalt fibers and construction method |
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