CN115012406A - Construction method for underwater glass fiber sleeve reinforced pile foundation - Google Patents
Construction method for underwater glass fiber sleeve reinforced pile foundation Download PDFInfo
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- CN115012406A CN115012406A CN202210713789.XA CN202210713789A CN115012406A CN 115012406 A CN115012406 A CN 115012406A CN 202210713789 A CN202210713789 A CN 202210713789A CN 115012406 A CN115012406 A CN 115012406A
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- glass fiber
- fiber sleeve
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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
- E02D5/64—Repairing piles
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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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- 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
- E02D5/60—Piles with protecting cases
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0051—Including fibers
- E02D2300/0053—Including fibers made from glass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Foundations (AREA)
Abstract
The invention discloses a construction method of an underwater glass fiber sleeve reinforced pile foundation, which comprises the following steps: the method comprises the following steps: construction preparation; step two: surface treatment; step three: manufacturing a glass fiber sleeve; step four: installing a glass fiber sleeve; step five: mounting a bottom sealing strip; step six: pouring epoxy grouting material; step seven: sealing and chamfering; step eight: and (4) removing the fastening belt. The WBA underwater glass fiber sleeve reinforcing system can economically and effectively recover and maintain the integrity of a pile foundation structure. In addition, expensive drainage operation is not needed, and construction in a traffic state can be realized. The form of the sleeve can be prefabricated according to the shape of a structure, and can meet wide construction requirements. The epoxy grouting material used by the reinforcing system can be firmly adhered to the surface of a structure, and the grouting material adopts a formula which is insensitive to water, can be constructed in a humid or watery environment, and has small use limitation.
Description
Technical Field
The invention relates to the technical field of reinforced pile foundation construction, in particular to a construction method of an underwater glass fiber sleeve reinforced pile foundation.
Background
With the rapid development of transportation, more and more bridges cross large rivers and even sea, and the deep water pile foundation is also better. The pile foundations of the bridge bear directly the load of the superstructure of the bridge and transfer the load to the foundation, where the bridge is also unfortunate if some goes wrong.
The construction of bridge pier stud is more complicated, and the pier stud is bearing high static stress under water, fatigue stress and rivers for a long time and is erodeing, microbial corrosion under water, bridge superstructure load etc. as bridge structures basis, easily appear that the concrete structure layer peels off, the reinforcing bar exposes, diseases such as corrosion, wherein because the influence of environment, aquatic pile foundation can also inevitable receive the erosion of water environment, if: chloride ions, sulfate ions and the like cause premature carbonization of underwater concrete of the pile foundation and corrosion of reinforcing steel bars, influence the durability of the bridge, seriously and even threaten the safety of the bridge, and further influence and reduce the durability and the bearing capacity of the bridge structure. The conventional bridge pile foundation reinforcing technologies such as a cofferdam method need to build a cofferdam and increase a section in the aspects of drainage, foundation seepage prevention and the like, the engineering quantity is large, the construction process is complex, and the construction cost is high.
Disclosure of Invention
The invention aims to solve the problems of the background technology and provides a construction method of an underwater glass fiber sleeve reinforced pile foundation.
The purpose of the invention can be realized by the following technical scheme:
a construction method of an underwater glass fiber sleeve reinforced pile foundation comprises the following steps:
the method comprises the following steps: construction preparation, inspecting a pile body and probing a construction environment;
step two: surface treatment, namely removing surface aquatic organisms, then chiseling surface concrete, removing rust on the surface of the steel bar, and then flushing by using a high-pressure water gun;
step three: the glass fiber sleeve is manufactured, and the glass fiber sleeve is prefabricated and produced by manufacturers after the size is determined on site;
step four: installing the glass fiber sleeve, putting the glass fiber sleeve in sections, injecting hydrogen ester epoxy glue into a lock catch groove of the sleeve during reinforcement, then expanding the glass fiber sleeve, wrapping a pile foundation, temporarily fixing the glass fiber sleeve by using a fastening belt after accurate positioning, and then anchoring the joint of the sleeve by using a stainless steel self-tapping screw;
step five: mounting a bottom sealing strip, mounting a 25mm compressible sealing strip at the bottom, and allowing no gap between a pile foundation and the glass fiber sleeve;
step six: filling epoxy grouting material, wherein the epoxy grouting material is filled by adopting a high-position funnel gravity grouting method, the bottom sealing is suspended after the first material for filling epoxy grouting is filled for 0-15 cm, and the epoxy grouting material is continuously filled after the bottom sealing grouting material is solidified until a section of glass fiber sleeve is filled;
step seven: sealing and chamfering;
step eight: and (4) removing the fastening belt.
As a further scheme of the invention: when the pile body is inspected, the length of an original steel casing, the exposed position of a steel bar, the diameter of the steel casing and the diameter of a pile foundation need to be checked; when the construction environment is explored, the elevation of the riverbed needs to be measured again, and the rockfill thickness of the riverbed covering layer needs to be found out.
As a further scheme of the invention: the chiseling depth is determined according to the situation, if cracks appear on the surface of the concrete, chiseling is carried out to the main rib part, if the surface of the concrete is complete, chiseling depth is 2cm, then washing is carried out by using a high-pressure water gun, and if the reinforcing steel bar is corroded, rust removal is carried out by using a steel wire brush.
As a further scheme of the invention: anchoring the sleeve joint at each 15cm position of the sleeve by using a stainless steel self-tapping screw; the meshing length of the glass fiber sleeve between the sections is 15cm, and the connecting meshing length of the glass fiber sleeve and the steel casing is 100 cm; the upper end and the lower end of the position of the glass fiber sleeve are pre-installed with the limiting devices before the glass fiber sleeve is installed, so that the glass fiber sleeve and the pile foundation are uniformly spaced, and the thickness of the colloid wrapping the pile foundation is uniform.
As a further scheme of the invention: and (3) injecting the epoxy grouting material into the bottom of the sleeve to a height of 15cm, suspending injection, and after the epoxy grouting material is cured for at least 8 hours, injecting the hydrogen ester epoxy grouting material which is mixed again into the sleeve until all water in the glass fiber sleeve is discharged and the grouting material is filled.
As a further scheme of the invention: and finally, building a slope at the top end part of the glass fiber sleeve by using hydrogen ester epoxy glue during chamfering, sealing the top, and dismantling the fastening belt after all construction is finished.
As a further scheme of the invention: the underwater epoxy grouting material is divided into a first material, a second material and a third material, the proportion is modulated and stirred on site according to actual conditions, the first material, the second material and the third material are sequentially added, and a mixer is adopted to fully stir until the color is uniform after the addition.
The invention has the beneficial effects that:
the WBA underwater glass fiber sleeve reinforcing system can economically and effectively recover and maintain the integrity of a pile foundation structure. In addition, expensive drainage operation is not needed, and construction in a traffic state can be realized.
The form of the sleeve can be prefabricated according to the shape of a structure, and can meet wide construction requirements. The epoxy grouting material used by the reinforcing system can be firmly adhered to the surface of a structure, and the grouting material adopts a formula insensitive to water, can be constructed in a humid or water environment, and has small use limitation.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a flow chart of the construction process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a first embodiment, please refer to fig. 1, the invention relates to a method for constructing an underwater glass fiber sleeve reinforced pile foundation, comprising the following steps:
the method comprises the following steps: construction preparation, inspecting a pile body and probing a construction environment;
step two: surface treatment, namely removing surface aquatic organisms, then chiseling surface concrete, removing rust on the surface of the steel bar, and then flushing by using a high-pressure water gun;
step three: the glass fiber sleeve is manufactured, and the glass fiber sleeve is prefabricated and produced by manufacturers after the size is determined on site;
the Glass fiber sleeve can be WBA Glass-F in type, the single-section prefabricated length is 2.1m, and the lap joint length is 10 cm.
Step four: installing the glass fiber sleeve, putting the glass fiber sleeve in sections, injecting hydrogen ester epoxy glue into a lock catch groove of the sleeve during reinforcement, then expanding the glass fiber sleeve, wrapping a pile foundation, temporarily fixing the glass fiber sleeve by using a fastening belt after accurate positioning, and then anchoring the joint of the sleeve by using a stainless steel self-tapping screw;
step five: mounting a bottom sealing strip, mounting a 25mm compressible sealing strip at the bottom, and allowing no gap between a pile foundation and the glass fiber sleeve;
step six: filling epoxy grouting material, wherein the epoxy grouting material is filled by adopting a high-position funnel gravity grouting method, the bottom sealing is suspended after the first material for filling epoxy grouting is filled for 0-15 cm, and the epoxy grouting material is continuously filled after the bottom sealing grouting material is solidified until a section of glass fiber sleeve is filled;
step seven: sealing and chamfering;
step eight: and (4) removing the fastening belt.
In a second embodiment, referring to fig. 1, the present invention is a method for constructing an underwater glass fiber sleeve reinforced pile foundation, including the following steps:
the method comprises the following steps: construction preparation, inspecting a pile body and probing a construction environment;
when the pile body is checked, the length of an original steel casing, the exposed position of a steel bar, the diameter of the steel casing and the diameter of a pile foundation need to be checked; when the construction environment is explored, the elevation of the riverbed needs to be measured again, and the thickness of the rockfill on the riverbed covering layer needs to be found out.
Step two: surface treatment, namely removing surface aquatic organisms, then chiseling surface concrete, removing rust on the surface of the steel bar, and then flushing by using a high-pressure water gun;
the chiseling depth is determined according to the situation, if cracks appear on the surface of the concrete, the main rib part is chiseled, if the surface of the concrete is complete, the chiseling depth is about 2cm, the main rib part is washed by a high-pressure water gun, and if the reinforcing steel bars are corroded, the steel wire brush is used for removing rust.
Step three: the glass fiber sleeve is manufactured, and the glass fiber sleeve is prefabricated and produced by manufacturers after the size is determined on site;
the Glass fiber sleeve can be WBA Glass-F in model, the single-section prefabricated length is 2.1m, and the lap joint length is 10 cm.
Step four: installing the glass fiber sleeve, putting the glass fiber sleeve in sections, injecting hydrogen ester epoxy glue into a lock catch groove of the sleeve during reinforcement, then expanding the glass fiber sleeve, wrapping a pile foundation, temporarily fixing the glass fiber sleeve by using a fastening belt after accurate positioning, and then anchoring the joint of the sleeve by using a stainless steel self-tapping screw;
wherein, anchoring the sleeve joint at each 15cm position of the sleeve by using stainless steel self-tapping screws; the meshing length of the glass fiber sleeve between the sections is 15cm, and the connecting meshing length of the glass fiber sleeve and the steel casing is 100 cm; the upper end and the lower end of the position of the glass fiber sleeve are pre-installed with the limiting devices before the glass fiber sleeve is installed, so that the glass fiber sleeve and the pile foundation are uniformly spaced, and the thickness of the colloid wrapping the pile foundation is uniform.
Step five: mounting a bottom sealing strip, mounting a 25mm compressible sealing strip at the bottom, and allowing no gap between a pile foundation and the glass fiber sleeve;
step six: pouring epoxy grouting material by adopting a high-position funnel gravity grouting method;
and after the epoxy grouting material is solidified for at least 8 hours, injecting the hydrogen ester epoxy grouting material which is mixed again into the sleeve until all water in the glass fiber sleeve is discharged and the grouting material is filled.
Step seven: sealing and chamfering;
and (3) building a slope at the top end of the glass fiber sleeve by using hydrogen ester epoxy glue during final chamfering, sealing the top, and dismantling the fastening belt after all construction is finished.
Step eight: and (4) removing the fastening belt.
In the third embodiment, on the basis of the first or second embodiment, the underwater epoxy grouting material is divided into a first material, a second material and a third material, the first material, the second material and the third material are stirred on site according to the proportion of 2.5: 1.0: 9.0, the first material, the second material and the third material are added sequentially, and after the addition is finished, a stirrer is adopted to fully stir until the color is uniform.
Wherein the first material is resin and the like; the second material is a curing agent and the like; the third material is modified aggregate and the like.
The mixture is stirred at any time on site, and the amount of the mixture is not more than 30kg at one time.
After the mixing is finished, the mixed materials are uniformly filled into the glass fiber sleeve, a layered filling method is adopted during filling, the filling height is 15cm each time, and the filling interval of each layer is 8 hours, so that the grouting material is fully cured. Because this technique is under the construction of environment under water, there is moisture in the glass fiber sleeve during the filling, fills the back of accomplishing, and the grout material fully extrudees out with the moisture in the sleeve, and until the grout material apart from the glass fiber sleeve top 1 ~ 2cm department, stop filling.
Preparing a grouting material, heating water in the outer protective cylinder in a perfusion mode, preparing the grouting material according to the ratio of the component A to the component B of the underwater hydrogen ester epoxy grouting material to be 16: 1, stirring for 2min at a constant speed by using a low-speed drill bit and a stirring blade plate, and immediately pumping after the preparation is finished.
The specific configuration quantity is determined according to the environment temperature, the construction time length and the usage amount, so that the situation that the configured grouting material cannot be used due to the fact that the time is exceeded is avoided.
The prepared grouting material is stored in a dry, ventilated and shady environment and is far away from a fire source, and a specially-assigned person is arranged to keep the grouting material.
When the loss rate of the section of the bridge pier column is within 25 percent, the gap is mainly filled with hydrogen ester epoxy grouting material or mortar, and water in the sleeve is automatically discharged; and when the loss rate of the section of the pier column is more than 25%, filling the bottom and the top of the sleeve after filling the gap with hydrogen ester epoxy grouting material.
After grouting construction is finished, the cross section of the top of the sleeve between the glass fiber sleeve and the bridge pier stud is sealed by using low-modulus hydrogen ester epoxy glue, and the fastening belt is detached after maintenance and reinforcement construction are completely finished.
The bridge pier stud is maintained for at least 7 days after the underwater maintenance and reinforcement construction is finished.
Construction materials:
the diameter and the length of the glass fiber sleeve are prefabricated in a factory according to data of an underwater touch pile foundation and then are transported to a construction site, the glass fiber sleeve is prefabricated according to 2.1m sections, and the lap joint length between the glass fiber sleeves is 10 cm.
Second, 25mm thick compressible joint strip: each section of the glass fiber sleeve is provided with 1 strip.
Thirdly, grouting material: the glass fiber sleeve is determined according to the field usage amount, and 60kg of each glass fiber sleeve is predicted.
Fourthly, top sealant: 3.5kg of glass fiber sleeve per linear meter.
Fifthly, screws and nuts: 5 sets of glass fiber sleeves are arranged every meter, and the installation distance is 20 cm.
Sixthly, fastening the belt: 4 glass fiber sleeves are arranged on each section, and the installation distance is 50 cm.
Seventhly, a limiting stopper: 25 glass fiber sleeves are arranged per square meter, the longitudinal and transverse distances are 20cm, and the glass fiber sleeves are distributed in a plum blossom shape.
Wherein, the technical indexes of the grouting material and the resin are as follows:
wherein, the technical indexes of the glass fiber sleeve are as follows:
| performance items | Test standards | Performance requirements |
| Tensile strength | GB/T 3354 | ≥100MPa |
| Bending strength | GB/T 3356 | ≥170MPa |
| Babbitt hardness | GB/T 3854 | ≥45MPa |
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (7)
1. A construction method for an underwater glass fiber sleeve reinforced pile foundation is characterized by comprising the following steps:
the method comprises the following steps: construction preparation, inspecting a pile body and probing a construction environment;
step two: surface treatment, namely removing surface aquatic organisms, then chiseling surface concrete, removing rust on the surface of the steel bar, and then flushing by using a high-pressure water gun;
step three: the glass fiber sleeve is manufactured, and the glass fiber sleeve is prefabricated and produced by manufacturers after the size is determined on site;
step four: installing the glass fiber sleeve, putting the glass fiber sleeve in sections, injecting hydrogen ester epoxy glue into a lock catch groove of the sleeve during reinforcement, then expanding the glass fiber sleeve, wrapping a pile foundation, temporarily fixing the glass fiber sleeve by using a fastening belt after accurate positioning, and then anchoring the joint of the sleeve by using a stainless steel self-tapping screw;
step five: mounting a bottom sealing strip, mounting a 25mm compressible sealing strip at the bottom, and not allowing a gap between the pile foundation and the glass fiber sleeve;
step six: filling epoxy grouting material, wherein the epoxy grouting material is filled by adopting a high-position funnel gravity grouting method, the bottom sealing is suspended after the first material for filling epoxy grouting is filled for 0-15 cm, and the epoxy grouting material is continuously filled after the bottom sealing grouting material is solidified until a section of glass fiber sleeve is filled;
step seven: sealing and chamfering;
step eight: and (4) removing the fastening belt.
2. The underwater glass fiber sleeve reinforced pile foundation construction method as claimed in claim 1, wherein the length of the original steel casing, the exposed position of the steel bars, the diameter of the steel casing and the diameter of the pile foundation need to be checked when the pile body is inspected; when the construction environment is explored, the elevation of the riverbed needs to be measured again, and the thickness of the rockfill on the covering layer of the riverbed is found out.
3. The method for constructing the underwater glass fiber sleeve reinforced pile foundation according to claim 1, wherein the chiseling depth is determined according to the situation, if cracks appear on the surface of the concrete, the chiseling depth is required to be 2cm when the surface of the concrete is intact, and the chiseling depth is used for flushing by using a high-pressure water gun, and if the reinforcing steel bars are corroded, the steel wire brush is used for removing rust.
4. The method for constructing the underwater glass fiber sleeve reinforced pile foundation according to claim 1, wherein a stainless steel self-tapping screw is used for anchoring the joint of the sleeve at each 15cm position of the sleeve; the meshing length of the glass fiber sleeve between the sections is 15cm, and the connecting meshing length of the glass fiber sleeve and the steel casing is 100 cm; the upper end and the lower end of the position of the glass fiber sleeve are pre-installed with the limiting devices before the glass fiber sleeve is installed, so that uniform gaps are formed between the glass fiber sleeve and the periphery of the pile foundation, and the uniform thickness of the colloid wrapping the pile foundation is ensured.
5. The method for constructing the underwater glass fiber sleeve reinforced pile foundation according to claim 1, wherein the filling of the epoxy grouting material is suspended after the epoxy grouting material is filled into the bottom of the sleeve to a height of 15cm, and after the epoxy grouting material is cured for at least 8 hours, the hydrogen ester epoxy grouting material which is mixed again is filled into the sleeve until all water in the glass fiber sleeve is discharged and the grouting material is filled.
6. The method for constructing the underwater glass fiber sleeve reinforced pile foundation according to claim 1, wherein a slope is built at the top end of the glass fiber sleeve by using hydrogen ester epoxy glue during final chamfering, top sealing is performed, and the fastening belt is removed after all construction is completed.
7. The method for constructing the underwater glass fiber sleeve reinforced pile foundation according to claim 1, wherein the underwater epoxy grouting material is divided into a first material, a second material and a third material, the proportion is modulated and mixed on site according to actual conditions, the first material, the second material and the third material are added in sequence, and after the first material, the second material and the third material are added, a mixer is adopted to fully stir until the color is uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210713789.XA CN115012406A (en) | 2022-06-22 | 2022-06-22 | Construction method for underwater glass fiber sleeve reinforced pile foundation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210713789.XA CN115012406A (en) | 2022-06-22 | 2022-06-22 | Construction method for underwater glass fiber sleeve reinforced pile foundation |
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| CN115012406A true CN115012406A (en) | 2022-09-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117721851A (en) * | 2024-02-07 | 2024-03-19 | 保利长大工程有限公司 | Underwater pile foundation reinforcing device and reinforcing method thereof |
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Application publication date: 20220906 |