CN114922170A - Design method for reinforcing wharf pile foundation based on basalt fiber sleeve - Google Patents
Design method for reinforcing wharf pile foundation based on basalt fiber sleeve Download PDFInfo
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- CN114922170A CN114922170A CN202210454203.2A CN202210454203A CN114922170A CN 114922170 A CN114922170 A CN 114922170A CN 202210454203 A CN202210454203 A CN 202210454203A CN 114922170 A CN114922170 A CN 114922170A
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- 229920002748 Basalt fiber Polymers 0.000 title claims abstract description 174
- 238000000034 method Methods 0.000 title claims abstract description 63
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 48
- 238000013461 design Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 70
- 239000004568 cement Substances 0.000 claims abstract description 51
- 230000002787 reinforcement Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000004381 surface treatment Methods 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims abstract description 8
- 239000002131 composite material Substances 0.000 claims description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 6
- 210000003205 muscle Anatomy 0.000 abstract description 4
- 230000035882 stress Effects 0.000 description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000007788 roughening Methods 0.000 description 6
- 238000000576 coating method Methods 0.000 description 4
- 239000012779 reinforcing material Substances 0.000 description 4
- 208000002740 Muscle Rigidity Diseases 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000013505 freshwater Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 239000003733 fiber-reinforced composite Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
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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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
- C04B14/4656—Al-silicates, e.g. clay
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Chemical & Material Sciences (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The application discloses a design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve, which comprises the following steps: carrying out surface treatment on the damaged beam bottom; constructing a reinforcement material; carrying out rough treatment on the surface of the pile foundation; installing a basalt fiber sleeve and a bottom sealing element; and (3) pouring the cement-based grouting material mixed with the basalt fiber chopped yarns. In this application, mix basalt fiber chopped strand and/or carry out muscle material construction on the pile foundation at cement base grouting material through the design, come further to improve the mechanics and the durability of basalt fiber sleeve reinforcing pier pile foundation structure, not only be applicable to the pier pile foundation, all effective to hydraulic engineering, marine structure pile foundation basis. After the reinforcing and repairing method is used for reinforcing and repairing the wharf pile foundation, the pile foundation does not need to be repaired again, and the maintenance cost of the pile foundation is saved.
Description
Technical Field
The application belongs to the technical field of reinforcing of wharf pile foundations, and particularly relates to a design method for reinforcing wharf pile foundations based on basalt fiber sleeves.
Background
The conventional high-pile wharf pile foundation repairing and reinforcing technology comprises a pile adding method, a cast-in-place concrete coating method and a glass fiber sleeve reinforcing method, wherein the two methods cannot solve the fundamental problem that the pile foundation is corroded and damaged for a long time, and the glass fiber sleeve is an organic polymer material, so that the ageing resistance is weak, and the reinforcing effect is short in service life. The basalt fiber sleeve reinforcing method is adopted, the impact and abrasion resistance is strong, the fatigue resistance is excellent, and the fiber performance is excellent, so that the basalt fiber sleeve reinforcing method is an excellent method for reinforcing wharf pile foundations. In order to further enhance the mechanics and durability of the wharf pile foundation structure, a design method for reinforcing the wharf pile foundation based on the basalt fiber sleeve is provided.
Disclosure of Invention
Aiming at the defects or shortcomings of the prior art, the technical problem to be solved by the application is to provide a design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve.
In order to solve the technical problem, the application is realized by the following technical scheme:
the application provides a design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve, which comprises the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
constructing a reinforcement material;
installing a basalt fiber sleeve and a bottom sealing element;
and (3) pouring the cement-based grouting material doped with the basalt fiber chopped yarns.
The application also provides a design method for reinforcing the wharf pile foundation based on the basalt fiber sleeve, which comprises the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
constructing a reinforcement material;
installing a basalt fiber sleeve and a bottom sealing element;
and (5) pouring cement-based grouting material.
The application further provides a design method for reinforcing the wharf pile foundation based on the basalt fiber sleeve, which comprises the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
installing a basalt fiber sleeve and a bottom sealing element;
and (3) pouring the cement-based grouting material doped with the basalt fiber chopped yarns.
Optionally, the method for designing a basalt fiber sleeve-based reinforced pier foundation includes, in the rib construction, the following steps: and (3) implanting longitudinal ribs and installing stirrups on the outer surface of the pile foundation by adopting a rib implanting method.
Optionally, in the above method for designing a basalt fiber sleeve-based reinforced pier foundation, the rib includes: reinforcing steel bars, basalt fiber composite bars, reinforcing steel bar-continuous basalt fiber composite bars or basalt fiber intelligent bars; the diameter of the longitudinal stress rib is designed to be 8-16 mm, and the diameter of the stirrup is designed to be 4-8 mm.
Optionally, in the method for designing a pier foundation reinforced by a basalt fiber sleeve, the steel bar-continuous basalt fiber composite bar is formed by compounding an inner steel bar and an outer longitudinal basalt fiber composite bar.
Optionally, in the method for designing a basalt fiber sleeve-based reinforced wharf pile foundation, the basalt fiber intelligent rib is a self-sensing intelligent material in which a stress characteristic and a sensing characteristic are integrated by embedding the distributed sensing optical fiber in a production process of the basalt fiber composite rib.
Optionally, in the method for designing the reinforced wharf pile foundation based on the basalt fiber sleeve, the basalt fiber chopped yarns doped into the cement-based grouting material have a design length of 6-15 mm.
Optionally, in the method for designing the basalt fiber sleeve-based reinforced wharf pile foundation, a nominal monofilament diameter of the basalt fiber chopped strand doped in the cement-based grouting material is 9-25 μm.
Optionally, in the method for designing the reinforced wharf pile foundation based on the basalt fiber sleeve, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.1% to 0.3%.
Compared with the prior art, the method has the following technical effects:
in the application, the mechanical property and the durability of the basalt fiber sleeve reinforced wharf pile foundation structure are further improved by designing a method of doping basalt fiber chopped yarns into a cement-based grouting material and/or adopting bar planting on the outer surface of the pile foundation, so that the basalt fiber sleeve reinforced wharf pile foundation structure is not only suitable for wharf pile foundations, but also effective for hydraulic and marine structure pile foundation foundations. After the reinforcing and repairing method is used for reinforcing and repairing the wharf pile foundation, the pile foundation does not need to be repaired again, and the maintenance cost of the pile foundation is saved.
In the application, the basalt fiber chopped yarn has good thermal compatibility with cement, high bonding strength with a basalt fiber sleeve and stable structure reinforcement.
In the application, the related reinforcements are various, and the reinforcements are most commonly used; the basalt fiber composite bar is most basic; the steel bar-continuous basalt fiber composite bar has the complementary advantages of high ductility of the steel bar and high strength of the basalt fiber bar material, and has the characteristics of high elastic modulus, high tensile strength, strong corrosion resistance, stable and reliable 'secondary rigidity' and excellent ductility and energy consumption capability in the structure, small residual displacement after earthquake, easiness in repair and the like; the basalt fiber intelligent rib can timely monitor the stress strain in the structure, and has the characteristics of electromagnetic interference resistance, distributed sensing, high measurement precision and the like.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: the method comprises the steps of firstly, reinforcing a wharf pile foundation based on a basalt fiber sleeve, and designing a basalt fiber sleeve;
FIG. 2: the method for designing the wharf pile foundation reinforced based on the basalt fiber sleeve is disclosed by the embodiment;
FIG. 3: in another embodiment of the application, a flow chart of a design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve is provided.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all 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 application.
Example one
As shown in fig. 1, in this embodiment, a design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve includes the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
constructing a reinforcement material;
installing a basalt fiber sleeve and a bottom sealing element;
and (3) pouring the cement-based grouting material doped with the basalt fiber chopped yarns.
This embodiment is applicable to: when the damaged area S of the pile foundation is larger than 25%, the reinforcing thickness is selected to be 50-60 mm; the reinforcement height is 50 cm-60 cm above and below the damaged area.
In the embodiment, the mechanical property and the durability of the basalt fiber sleeve reinforced wharf pile foundation structure are further improved by designing the method of doping the basalt fiber chopped yarns into the cement-based grouting material and adopting the bar planting on the outer surface of the pile foundation, so that the basalt fiber sleeve reinforced wharf pile foundation structure is not only suitable for wharf pile foundations, but also effective for hydraulic and marine structure pile foundation foundations. After the reinforcing and repairing method is used for reinforcing and repairing the wharf pile foundation, the pile foundation does not need to be repaired again, and the maintenance cost of the pile foundation is saved.
In the surface treatment of the damaged beam bottom, loose and damaged concrete at the damaged beam bottom is removed to dense aggregate in modes of chiseling or high-pressure fresh water and the like, so that a foundation is laid for the subsequent installation of the basalt fiber sleeve.
In the above-mentioned muscle material construction, include: and (3) implanting longitudinal ribs and installing stirrups on the outer surface of the pile foundation by adopting a rib implanting method.
Further preferably, in the above construction of the reinforcing material, the method further comprises: longitudinal ribs with a limiting device are implanted. Further preferably, the longitudinal ribs and the limiting device are of an integrally formed structure, and batch processing and production can be achieved.
The limiting devices are arranged at equal intervals, wherein the transverse intervals and the vertical intervals are 300-500 mm. Specifically, it is further preferable that the transverse distance is 350-500 mm; further preferably, the transverse spacing is 350-450 mm; further preferably, the transverse distance is 400-450 mm; further preferably, the longitudinal distance is 350-500 mm; further preferably, the longitudinal distance is 350-450 mm; further preferably, the longitudinal distance is 400-450 mm.
Further preferably, the limiting device is a disc-shaped structure, and the limiting device can play a role in limiting, installing the basalt fiber sleeve and installing a stirrup which is described below through the arrangement of the disc-shaped structure.
The thickness of the limiting device is further preferably 1-2 cm; the thickness of the limiting device is further preferably 1-1.5 cm.
Wherein, in the stirrup above, in particular, the stirrup is mounted on the limiting device in particular. Wherein the stirrups may further strengthen the overall structure, e.g. in shear.
In this embodiment, the basalt fiber sleeve is mounted by the limiting device fixed on the longitudinal rib, then the curing glue is used for adhering the seam, and finally the fastening tape is used for fixing.
Further, the rib includes: the steel bar, the basalt fiber composite rib, the steel bar-continuous basalt fiber composite rib or the basalt fiber intelligent rib.
The basalt fiber composite rib is a fiber reinforced composite material product which is prepared by taking basalt fiber materials as a reinforcing material, resin, filler and the like as a matrix and through a drawing process, and longitudinal ribs, stirrups, circumferential ribs and the like with different specifications can be produced according to different processes.
The steel bar-continuous basalt fiber composite bar is formed by compounding an inner steel bar and an outer longitudinal basalt fiber composite bar. The reinforcing steel bar-continuous basalt fiber composite bar has the complementary advantages of high ductility of reinforcing steel bars and high strength of basalt fiber reinforcing bars, and has the characteristics of high elastic modulus, high tensile strength, strong corrosion resistance, stable and reliable 'secondary rigidity' and excellent ductility and energy consumption capability in the structure, small residual displacement after an earthquake, easiness in repair and the like.
The basalt fiber intelligent rib is a self-sensing intelligent material which integrates the stress and sensing characteristics by embedding the distributed sensing optical fiber in the production process of the basalt fiber composite rib. The basalt fiber intelligent rib can timely monitor the stress strain in the structure, and has the characteristics of electromagnetic interference resistance, distributed sensing, high measurement precision and the like.
Alternatively, in the above-described roughening treatment of the pile foundation surface, the coating layer on the pile foundation surface is removed by a pneumatic tool or the like to perform the roughening treatment. The treated pile foundation surface is required to have no fouling such as coating, oil stain and the like, and the pile foundation surface is polished by a pneumatic grinder and the like to increase the binding power with the grouting material.
The basalt fiber sleeve is formed by rolling basalt fiber plates, and preferably, the basalt fiber sleeve is of an integrally formed structure.
In the embodiment, the thickness of the basalt fiber sleeve is 5-6 mm. Further preferably, the thickness of the basalt fiber sleeve is 5.5-6 mm.
Wherein, in the above installation bottom seal, the bottom seal includes but is not limited to: and the sealing rubber strip is compressible at the bottom, so that no gap is allowed between the pile foundation and the bottom of the basalt fiber sleeve, and the reinforcing reliability is improved.
In the embodiment, the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 6-15 mm. Further preferably, the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 7-15 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 7-14 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 8-14 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 8-13 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 9-13 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 9-12 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 10-12 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 10-11 mm; .
Further preferably, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.1-0.3%; further preferably, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.15-0.3%; further preferably, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.2-0.3%; further preferably, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.2-0.25%.
The basalt fiber chopped strand has good thermal compatibility with cement, high bonding strength with a basalt fiber sleeve, and stable structure reinforcement.
Example two
As shown in fig. 2, in this embodiment, a method for designing a wharf pile foundation reinforced based on a basalt fiber sleeve includes the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
constructing a reinforcement material;
installing a basalt fiber sleeve and a bottom sealing element;
and (5) pouring cement-based grouting material.
This embodiment is applicable to: when the damaged area of the pile foundation is more than 10% and S is less than 25%, the reinforcement thickness is 30-50 mm; the reinforcement height is 40 cm-50 cm above and below the damaged area.
In the embodiment, the mechanical property and the durability of the basalt fiber sleeve reinforced wharf pile foundation structure are further improved by adopting the cement-based grouting material and the method of adopting the steel bars on the outer surface of the pile foundation, so that the method is suitable for the wharf pile foundation and is effective for both hydraulic engineering and marine engineering structure pile foundation foundations. After the reinforcing and repairing method is used for reinforcing and repairing the wharf pile foundation, the pile foundation does not need to be repaired again, and the maintenance cost of the pile foundation is saved.
In the surface treatment of the damaged beam bottom, loose and damaged concrete at the damaged beam bottom is removed to dense aggregate in modes of chiseling or high-pressure fresh water and the like, so that a foundation is laid for the subsequent installation of the basalt fiber sleeve.
In the above-mentioned muscle material construction, include: and (3) implanting longitudinal ribs and installing stirrups on the outer surface of the pile foundation by adopting a rib implanting method.
In the above-mentioned muscle material construction, include: and implanting longitudinal ribs and installing stirrups on the outer surface of the pile foundation by adopting a rib implanting method.
Further preferably, in the above construction of the reinforcing material, the method further comprises: implanting longitudinal ribs with a limiting device. Further preferably, the longitudinal ribs and the limiting device are of an integrally formed structure, and batch processing and production can be achieved.
The limiting devices are arranged at equal intervals, wherein the transverse intervals and the vertical intervals are 300-500 mm. Specifically, it is further preferable that the transverse distance is 350 to 500 mm; further preferably, the transverse spacing is 350-450 mm; further preferably, the transverse spacing is 400-450 mm; further preferably, the longitudinal distance is 350-500 mm; further preferably, the longitudinal distance is 350-450 mm; further preferably, the longitudinal distance is 400-450 mm.
Further preferably, the limiting device is a disc-shaped structure, and the limiting device can play a role in limiting, installing the basalt fiber sleeve and installing a stirrup which is described below through the arrangement of the disc-shaped structure.
The thickness of the limiting device is further preferably 1-2 cm; the thickness of the limiting device is further preferably 1-1.5 cm.
Wherein, in the stirrup, the stirrup is specifically mounted on the limiting device. Wherein the stirrups may further strengthen the overall structure, e.g. in shear.
In this embodiment, the basalt fiber sleeve is mounted by the limiting device fixed on the longitudinal rib, then the curing glue is used for adhering the seam, and finally the fastening tape is used for fixing.
Further, the rib includes: the steel bar, the basalt fiber composite bar, the steel bar-continuous basalt fiber composite bar or the basalt fiber intelligent bar.
The basalt fiber composite rib is a fiber reinforced composite material product which is prepared by taking basalt fiber materials as a reinforcing material, resin, filler and the like as a matrix and through a drawing process, and longitudinal ribs, stirrups, circumferential ribs and the like with different specifications can be produced according to different processes.
The steel bar-continuous basalt fiber composite bar is formed by compounding an inner steel bar and an outer longitudinal basalt fiber composite bar. The reinforcing steel bar-continuous basalt fiber composite bar has the complementary advantages of high ductility of reinforcing steel bars and high strength of basalt fiber reinforcing bars, and has the characteristics of high elastic modulus, high tensile strength, strong corrosion resistance, stable and reliable 'secondary rigidity' and excellent ductility and energy consumption capability in the structure, small residual displacement after an earthquake, easiness in repair and the like.
The basalt fiber intelligent rib is a self-sensing intelligent material which integrates the stress and sensing characteristics by embedding the distributed sensing optical fiber in the production process of the basalt fiber composite rib. The basalt fiber intelligent rib can timely monitor the stress strain in the structure, and has the characteristics of electromagnetic interference resistance, distributed sensing, high measurement precision and the like.
Alternatively, in the above-described roughening treatment of the pile foundation surface, the coating layer on the pile foundation surface is removed by a pneumatic tool or the like to perform the roughening treatment. The treated pile foundation surface is required to have no fouling such as coating, oil stain and the like, and the pile foundation surface is polished by a pneumatic grinder and the like to increase the binding power with the grouting material.
The basalt fiber sleeve is formed by rolling basalt fiber plates, and preferably, the basalt fiber sleeve is of an integrally formed structure.
In the embodiment, the thickness of the basalt fiber sleeve is 3-10 mm. Further preferably, the thickness of the basalt fiber sleeve is 4-9 mm; further preferably, the thickness of the basalt fiber sleeve is 4-8 mm; further preferably, the thickness of the basalt fiber sleeve is 5-7 mm; further preferably, the thickness of the basalt fiber sleeve is 5-6 mm.
Wherein, in the above installation bottom seal, the bottom seal includes but is not limited to: and the sealing rubber strip is compressible at the bottom, so that no gap is allowed between the pile foundation and the bottom of the basalt fiber sleeve, and the reinforcing reliability is improved.
EXAMPLE III
As shown in fig. 3, in this embodiment, a design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve includes the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
installing a basalt fiber sleeve and a bottom sealing element;
and (3) pouring the cement-based grouting material mixed with the basalt fiber chopped yarns.
This embodiment is applicable to: when the damaged area S of the pile foundation is less than 10%, the reinforcing thickness is 10-30 mm; the reinforcement height is 30 cm-40 cm above and below the damaged area in the use scene.
In the embodiment, by designing the method for doping the basalt fiber chopped yarns into the cement-based grouting material, the mechanical property and the durability of the basalt fiber sleeve reinforced wharf pile foundation structure are further improved, and the basalt fiber sleeve reinforced wharf pile foundation structure is not only suitable for wharf pile foundations, but also effective for hydraulic and marine structure pile foundation foundations. Adopt this application to pier pile foundation reinforcement restoration back, need not to repair again, practice thrift pile foundation maintenance cost.
In the surface treatment of the damaged beam bottom, loose and damaged concrete at the damaged beam bottom is removed to dense aggregate in modes of chiseling or high-pressure fresh water and the like, so that a foundation is laid for the subsequent installation of the basalt fiber sleeve.
Alternatively, in the above-described roughening treatment of the pile foundation surface, the coating layer of the pile foundation surface is removed by a pneumatic tool or the like to perform the roughening treatment. The treated pile foundation surface has no coating, oil stain and other fouling matters, and is polished by a pneumatic grinder and the like to increase the binding power with the grouting material.
The basalt fiber sleeve is formed by rolling basalt fiber plates, and preferably is of an integrally formed structure.
In the embodiment, the thickness of the basalt fiber sleeve is 3-10 mm. Further preferably, the thickness of the basalt fiber sleeve is 4-9 mm; further preferably, the thickness of the basalt fiber sleeve is 4-8 mm; further preferably, the thickness of the basalt fiber sleeve is 5-7 mm; further preferably, the thickness of the basalt fiber sleeve is 5-6 mm.
Wherein, in the above installation bottom seal, the bottom seal includes but is not limited to: and the sealing rubber strip is compressible at the bottom, so that no gap is allowed between the pile foundation and the bottom of the basalt fiber sleeve, and the reinforcing reliability is improved.
In the embodiment, the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 6-15 mm. Further preferably, the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 7-15 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 7-14 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 8-14 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 8-13 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 9-13 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 9-12 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 10-12 mm; the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 10-11 mm; .
Further preferably, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.1-0.3%; further preferably, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.15-0.3%; further preferably, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.2-0.3%; further preferably, the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.2-0.25%.
The basalt fiber chopped strand has good thermal compatibility with cement, high bonding strength with a basalt fiber sleeve and stable structure reinforcement.
In the application, the mechanical property and the durability of the basalt fiber sleeve reinforced wharf pile foundation structure are further improved by designing a method of doping basalt fiber chopped yarns into a cement-based grouting material and/or adopting bar planting on the outer surface of the pile foundation, so that the basalt fiber sleeve reinforced wharf pile foundation structure is not only suitable for wharf pile foundations, but also effective for hydraulic and marine structure pile foundation foundations. After the reinforcing and repairing method is used for reinforcing and repairing the wharf pile foundation, the pile foundation does not need to be repaired again, and the maintenance cost of the pile foundation is saved. Therefore, the method has good market application prospect.
In the description of the present application, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplicity of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It should be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the true spirit and scope of the claims which follow.
Claims (10)
1. A design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve is characterized by comprising the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
constructing a reinforcement material;
installing a basalt fiber sleeve and a bottom sealing element;
and (3) pouring the cement-based grouting material mixed with the basalt fiber chopped yarns.
2. A design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve is characterized by comprising the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
constructing a reinforcement material;
installing a basalt fiber sleeve and a bottom sealing element;
and (5) pouring cement-based grouting material.
3. A design method for reinforcing a wharf pile foundation based on a basalt fiber sleeve is characterized by comprising the following steps:
carrying out surface treatment on the damaged beam bottom;
carrying out rough treatment on the surface of the pile foundation;
installing a basalt fiber sleeve and a bottom sealing element;
and (3) pouring the cement-based grouting material doped with the basalt fiber chopped yarns.
4. The design method for reinforcing the wharf pile foundation based on the basalt fiber sleeve as claimed in claim 1 or 2, wherein in the rib material construction, the method comprises the following steps: and (3) implanting longitudinal ribs and installing stirrups on the outer surface of the pile foundation by adopting a rib implanting method.
5. The design method for reinforcing wharf pile foundations based on the basalt fiber sleeves according to claim 1 or 2, wherein the reinforcement comprises: the diameter of the longitudinal stress bar is designed to be 8-16 mm, and the diameter of the stirrup is designed to be 4-8 mm.
6. The design method for reinforcing the wharf pile foundation based on the basalt fiber sleeve, according to claim 5, is characterized in that the steel bar-continuous basalt fiber composite bar is formed by compounding an inner steel bar and an outer longitudinal basalt fiber composite bar.
7. The design method for reinforcing the wharf pile foundation based on the basalt fiber sleeve according to claim 5, wherein the basalt fiber intelligent rib is a self-sensing intelligent material formed by embedding a distributed sensing optical fiber in a production process of a basalt fiber composite rib and integrating stress and sensing characteristics.
8. The design method for reinforcing the wharf pile foundation based on the basalt fiber sleeve is characterized in that the designed length of the basalt fiber chopped yarns doped in the cement-based grouting material is 6-15 mm.
9. The design method for reinforcing the wharf pile foundation based on the basalt fiber sleeve, according to claim 8, wherein the nominal monofilament diameter of the basalt fiber chopped yarn doped in the cement-based grouting material is 9-25 μm.
10. The design method for reinforcing wharf pile foundations based on basalt fiber sleeves according to claim 9, wherein the volume doping amount of the basalt fiber chopped yarns doped in the cement-based grouting material is 0.1% -0.3%.
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| CN202210454203.2A CN114922170A (en) | 2022-04-27 | 2022-04-27 | Design method for reinforcing wharf pile foundation based on basalt fiber sleeve |
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| CN202210454203.2A CN114922170A (en) | 2022-04-27 | 2022-04-27 | Design method for reinforcing wharf pile foundation based on basalt fiber sleeve |
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