CN115126159A - Glass fiber pile foundation reinforcement cage and construction method thereof - Google Patents
Glass fiber pile foundation reinforcement cage and construction method thereof Download PDFInfo
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- CN115126159A CN115126159A CN202210730703.4A CN202210730703A CN115126159A CN 115126159 A CN115126159 A CN 115126159A CN 202210730703 A CN202210730703 A CN 202210730703A CN 115126159 A CN115126159 A CN 115126159A
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 171
- 230000002787 reinforcement Effects 0.000 title claims abstract description 143
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 52
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 34
- 239000011152 fibreglass Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000004567 concrete Substances 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 230000027455 binding Effects 0.000 claims description 6
- 239000011241 protective layer Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 6
- 238000005260 corrosion Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 description 10
- 239000003513 alkali Substances 0.000 description 5
- 210000003205 muscle Anatomy 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241001466077 Salina Species 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000009870 specific binding Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
-
- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a glass fiber pile foundation reinforcement cage and a construction method thereof. The glass fiber reinforcement cage comprises a plurality of glass fiber main reinforcements which are uniformly distributed along the circumferential direction. The reinforcement cage includes a plurality of reinforcing bars that evenly distributed along the circumferencial direction. The plurality of steel bars correspond to the plurality of glass fiber main bars one by one, and the corresponding steel bars are connected with the glass fiber main bars through U-shaped cards. One end of the glass fiber reinforcement cage far away from the reinforcement cage is provided with a reinforcement hoop. The reinforcing steel bar reinforcing hoop is fixedly connected with the plurality of glass fiber main reinforcements. And glass fiber reinforced hoops are arranged at intervals along the direction from the reinforced hoop to the reinforcement cage. The reinforcing steel bar reinforcing hoops and the plurality of glass fiber stirrups are coaxially arranged, so that the corrosion resistance is improved, the reinforcing steel bar reinforcing hoops can be used as a permanent supporting material, the service life of a bridge structure is prolonged, and the secondary repair cost is reduced.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a glass fiber pile foundation reinforcement cage and a construction method thereof.
Background
The reinforcement cage mainly plays a role similar to the stress of the longitudinal reinforcement of the column, and mainly plays a role of tensile strength, and the compressive strength of the concrete is high but the tensile strength is very low. The pile body concrete is restrained, so that the pile body concrete can bear certain axial tension. During construction of bridges and culverts or high-rise buildings, piles are driven according to the requirements, wherein the method comprises the steps of punching holes by using a machine and drilling holes by using a water mill, enabling the hole depth to reach the design requirement, then placing a steel reinforcement cage into the pile hole, and then inserting a guide pipe for concrete pouring.
The reinforcement cage in the prior art is composed of reinforcement bars, so that the whole weight is heavy, great labor intensity is caused to constructors, and the transportation cost is also extremely high; because the corrosion resistance of the steel bar is not high, potential safety hazards exist after the steel bar is used for a long time in a bridge building, and secondary repair is needed.
Disclosure of Invention
The invention aims to provide a glass fiber pile foundation reinforcement cage, which solves the following technical problems:
the existing reinforcement cage is composed of reinforcement bars, the whole weight is large, great labor intensity is caused to constructors, and the transportation cost is also extremely high; because the self corrosion resistance of the steel bar is not high, potential safety hazards exist after the steel bar is used for a long time in a bridge building, and secondary repair is needed.
The purpose of the invention can be realized by the following technical scheme:
a glass fiber pile foundation reinforcement cage comprises a glass fiber reinforcement cage and a reinforcement cage which are coaxially connected. The glass fiber reinforcement cage comprises a plurality of glass fiber main reinforcements which are uniformly distributed along the circumferential direction. The reinforcement cage includes a plurality of reinforcing bars that evenly distributed along the circumferencial direction.
The plurality of steel bars correspond to the plurality of glass fiber main bars one by one, and the corresponding steel bars are connected with the glass fiber main bars through U-shaped cards.
One end of the glass fiber reinforcement cage far away from the reinforcement cage is provided with a reinforcement hoop. The reinforcing steel bar reinforcing hoop is fixedly connected with the plurality of glass fiber main reinforcements. And glass fiber reinforced hoops are arranged at intervals along the direction from the reinforced hoop to the reinforcement cage. And at the glass fiber reinforcement cage section, the glass fiber reinforcement hoop is fixedly connected with the plurality of glass fiber main reinforcements. And at the reinforcement cage section, the glass fiber reinforced hoop is fixedly connected with a plurality of reinforcements.
Wherein, the reinforcing bar reinforcing hoop and a plurality of glass fiber stirrups are coaxially arranged.
As a further scheme of the invention: the lap length of the reinforcing steel bar and the glass fiber main bar is not less than 1 m. And the number of U-shaped clamps between the single steel bar and the single glass fiber main bar is not less than 4.
As a further scheme of the invention: and glass fiber spiral stirrups are arranged outside the glass fiber reinforcement cage and the reinforcement cage. The glass fiber spiral stirrup and the glass fiber main reinforcement as well as the glass fiber spiral stirrup and the reinforcing steel bar are bound by iron wires.
The invention also discloses a construction method of the glass fiber pile foundation reinforcement cage, which comprises the following steps:
and S1, embedding the pile casing in the pit, leveling and adjusting the pile casing to enable the central vertical line of the pile casing to coincide with the central line of the pile.
And S2, drilling by using a drilling machine, and cleaning the hole position.
And S3, manufacturing a glass fiber pile foundation reinforcement cage.
And S4, lowering the glass fiber pile foundation reinforcement cage into the hole site.
And S5, pile foundation pouring is carried out, and the pile head is processed.
As a further scheme of the invention: the process of manufacturing the glass fiber pile foundation reinforcement cage comprises the following steps:
and S31, taking a glass fiber main rib and a steel bar, and fixing the glass fiber main rib and the steel bar by utilizing a U-shaped clamp to obtain a reference main rib.
And S32, manufacturing the glass fiber reinforced hoop and the reinforcing steel bar reinforced hoop according to the design size.
S33, fixing the reference main bar, sequentially binding the reinforcing steel bar hoop and the plurality of glass fiber reinforcing hoops on the reference main bar, and enabling the central shafts of the reinforcing steel bar hoop and all the glass fiber reinforcing hoops to coincide on the same straight line.
And S34, welding the rest glass fiber main reinforcements and the steel bars to the outer sides of the steel bar reinforcing hoops and the glass fiber reinforcing hoops one by one in sequence. And controlling the glass fiber main reinforcements and the reinforcing steel bars to correspond one to one.
And S35, fixing all the glass fiber main reinforcements and the reinforcing steel bars in one-to-one correspondence by utilizing the U-shaped clamps.
And S36, encircling the glass fiber spiral stirrup on the outer sides of the glass fiber main reinforcement and the reinforcing steel bar, and fixing by binding.
As a further scheme of the invention: the process that glass fiber pile foundation muscle cage was transferred includes:
s41, arranging protective layer control surfaces every 2m in the extending direction of the glass fiber pile foundation reinforcement cage, wherein each protective layer control surface comprises 4 roller type cushion blocks uniformly arranged along the periphery of the pile. In the circumferential direction, the roller type cushion blocks in the adjacent control surfaces are arranged in a staggered mode by 45 degrees.
S42, uniformly welding reinforcing steel bar heads along the circumferential outer wall of the reinforcing steel bar hoop, and keeping a gap of 5-10mm between the reinforcing steel bar heads and the inner wall of the pile casing. Through U type card ligature spacer bar on the glass fiber owner muscle, the spacer bar other end adjusts good elevation postweld in the pile casing top surface, and the spacer bar evenly sets up along the stake week.
S43, selecting at least two hoisting points on the reinforcing steel bar reinforcing hoop to hoist, and vertically lowering the glass fiber pile foundation reinforcement cage into the pile hole.
As a further scheme of the invention: the number of the reinforcing steel bar heads is not less than 4. The number of the positioning steel bars is not less than 4.
As a further scheme of the invention: whether the U-shaped clamps are installed and fastened one by one is checked in the process of vertically putting down the glass fiber pile foundation reinforcement cage.
As a further scheme of the invention: when the pile foundation is poured, the pouring height is controlled to be 50cm higher than the elevation of the pile top, pile top slurry is timely pumped out after the pile foundation is poured, pile top sediment and surface layer concrete are cleaned layer by layer, the pile top concrete is vibrated and compacted through a vibrating rod after being cleaned up, and the pile top is chiseled.
The invention has the beneficial effects that:
the glass fiber pile foundation reinforcement cage is formed by combining a glass fiber reinforcement cage and a reinforcement cage, and the glass fiber main reinforcement replaces most of reinforcements in the prior art, so that the corrosion resistance is improved, the glass fiber pile foundation reinforcement cage can be used as a permanent supporting material, the service life of a bridge structure is prolonged, and the secondary repair cost is reduced; the tensile strength is also improved and is about twice of the load of the steel bars with the same specification; the weight is reduced by the colleagues, the weight is only 1/4 of the weight of the steel bar with the same specification, the labor intensity of workers is greatly reduced, and the transportation cost is also reduced; and the glass fiber main ribs are non-conductive and non-combustible, so that sparks are not generated during cutting, and potential safety hazards during construction and use are greatly reduced.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic structural view of a glass fiber pile foundation reinforcement cage of the present invention;
FIG. 2 is a top view of the construction of the fiberglass pile foundation reinforcement cage of the present invention;
fig. 3 is a schematic structural diagram of a U-shaped clamp in the glass fiber pile foundation reinforcement cage.
In the figure: 1. a glass fiber reinforcement cage; 11. a glass fiber main rib; 2. a reinforcement cage; 21. reinforcing steel bars; 3. reinforcing steel bar reinforcing hoops; 4. a glass fiber reinforced ferrule; 5. a glass fiber spiral stirrup; 6. a U-shaped card.
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.
Referring to fig. 1-3, the invention discloses a glass fiber pile foundation reinforcement cage, which comprises a glass fiber reinforcement cage 1 and a reinforcement cage 2 which are coaxially connected. The glass fiber reinforcement cage 1 comprises a plurality of glass fiber main reinforcements 11 which are uniformly distributed along the circumferential direction. The reinforcement cage 2 comprises a plurality of reinforcement bars 21 which are evenly distributed in the circumferential direction.
The plurality of steel bars 21 correspond to the plurality of glass fiber main bars 11 one by one, and the corresponding steel bars 21 are connected with the glass fiber main bars 11 through U-shaped clamps 6.
One end of the glass fiber reinforcement cage 1 far away from the reinforcement cage 2 is provided with a reinforcement hoop 3. The reinforcing steel bar reinforcing hoop 3 is fixedly connected with a plurality of glass fiber main reinforcements 11. And glass fiber reinforced hoops 4 are arranged at intervals along the direction from the reinforcing steel bar reinforced hoop 3 to the reinforcing steel bar cage 2. At the section of the glass fiber reinforcement cage 1, the glass fiber reinforcement hoop 4 is fixedly connected with a plurality of glass fiber main reinforcements 11. At the section of the reinforcement cage 2, the glass fiber reinforced hoop 4 is fixedly connected with a plurality of reinforcements 21.
Wherein the reinforcing steel bar reinforcing hoop 3 and the plurality of glass fiber stirrups are coaxially arranged. The lapping length of the reinforcing steel bar 21 and the glass fiber main reinforcement 11 is not less than 1 m. And the number of the U-shaped clamps 6 between the single steel bar 21 and the single glass fiber main bar 11 is not less than 4.
The glass fiber in the glass fiber main rib 11 of the invention should use high-strength alkali-free glass fiber or alkali-resistant glass fiber with alkali content less than 0.8%, and the resin adopts vinyl resin, so that the alkali glass fiber and the high-alkali glass fiber cannot be used. The shape of the glass fiber main rib 11 is a thread form, the surface texture of the threaded rod body is uniform, no bubbles or cracks exist, the thread shape and the thread pitch are neat, no damage exists, the standard value of the tensile strength of the glass fiber rib is not lower than 650MPa, and the elastic modulus is larger than 42 GPa. The fiberglass king wire 11 is not suitable for field trimming. When the glass fiber main rib is required to be cut off, a high-speed abrasive cutting machine with no-load speed not less than 600r/min is adopted, and the surface of the glass fiber main rib 11 is not damaged in the cutting-off process. The outer surface of the glass fiber main rib 11 is polluted and is extremely difficult to clean, so that the glass fiber main rib is stored on site in a mode of arranging the lower cushion and the upper cover, the lower cushion is preferably made of a steel plate stool, the height of the lower cushion is not lower than 30cm, and the surface layer is covered by canvas. When the glass fiber main reinforcement 11 is assembled and disassembled, small pieces with light weight are assembled and disassembled manually, bundled straight materials are bound and lifted by a lifting cloth bag at multiple points, and the straight materials are not lifted by a steel wire rope to prevent the materials from being damaged. When the glass fiber reinforced plastic composite material is stored on a construction site, the glass fiber reinforced plastic composite material is preferably stored in a ventilated and dry room, and when the glass fiber reinforced plastic composite material is stored outdoors, the glass fiber reinforced plastic composite material is not directly placed on the ground, an upper cover is arranged below the glass fiber reinforced plastic composite material, and the glass fiber reinforced plastic composite material is fireproof and is prevented from being damaged by high temperature, ultraviolet rays and chemical substances above 60 degrees. The surface of the glass fiber rib should not be obviously scratched, and the loss rate of the section area cannot exceed 1%; when not satisfactory, it should be disposed of as waste.
In one embodiment of the invention, the glass fiber reinforcement cage 1 and the reinforcement cage 2 are externally provided with a glass fiber spiral stirrup 5. The glass fiber spiral stirrup 5 and the glass fiber main reinforcement 11 as well as the glass fiber spiral stirrup 5 and the reinforcing steel bar 21 are bound by iron wires.
In one embodiment of the invention, the construction method of the glass fiber pile foundation reinforcement cage specifically comprises the following steps S1-S5.
And S1, embedding the pile casing in the pit, leveling and adjusting the pile casing to enable the central vertical line of the pile casing to coincide with the central line of the pile.
And S2, drilling by using a drilling machine, and cleaning the hole position.
And S3, manufacturing a glass fiber pile foundation reinforcement cage. The glass fiber pile foundation reinforcement cage consists of an upper section of glass fiber reinforcement cage 1 and a lower section of reinforcement cage 2. The specific process is as follows:
and S31, taking a glass fiber main rib 11 and a steel bar 21, and fixing the glass fiber main rib 11 and the steel bar 21 by utilizing the U-shaped clamp 6 to obtain a reference main rib. During specific binding, the lapping length of the glass fiber main reinforcement 11 and the reinforcement 21 is 1 meter, and 4 steel U-shaped clamps 6 are adopted for connection.
And S32, manufacturing the glass fiber reinforced hoop 4 and the reinforcing steel bar reinforced hoop 3 according to the design size.
S33, fixing the reference main bar, sequentially binding the reinforcing steel bar reinforcing hoop 3 and the plurality of glass fiber reinforcing hoops 4 on the reference main bar, and enabling the central shafts of the reinforcing steel bar reinforcing hoop 3 and all the glass fiber reinforcing hoops 4 to be coincided on the same straight line. During specific ligature, the clearance of reinforcing bar 3 and a plurality of glass fiber reinforcement hoop 4 is 2m, and 6 steel U type cards 6 of group that all adopt evenly distributed are fixed between glass fiber owner muscle 11 and reinforcing bar 21 and the reinforcement hoop, 2U type cards 6 of every group, all the other ligatures of adoption iron wire.
And S34, welding the rest of the glass fiber main reinforcements 11 and the steel bars 21 to the outer sides of the steel bar reinforcing hoop 3 and the glass fiber reinforcing hoop 4 one by one in sequence. And controlling the fiberglass main bars 11 and the reinforcing steel bars 21 to correspond one to one.
And S35, fixing the glass fiber main reinforcements 11 and the reinforcing steel bars 21 in a one-to-one correspondence mode by utilizing the U-shaped clamps 6.
And S36, the fiberglass spiral stirrup 5 is wound on the outer sides of the fiberglass main reinforcement 11 and the reinforcing steel bar 21 and is fixed by binding.
And S4, lowering the glass fiber pile foundation reinforcement cage into the hole site. The specific process is as follows:
s41, arranging protective layer control surfaces every 2m in the extending direction of the glass fiber pile foundation reinforcement cage, wherein each protective layer control surface comprises 4 roller type cushion blocks uniformly arranged along the periphery of the pile. In the circumferential direction, the roller type cushion blocks in the adjacent control surfaces are arranged in a staggered mode by 45 degrees.
S42, uniformly welding reinforcing steel bar heads along the circumferential outer wall of the reinforcing steel bar hoop 3, and keeping a gap of 5-10mm between the reinforcing steel bar heads and the inner wall of the pile casing. The positioning steel bars 21 are bound on the glass fiber main bars 11 through the U-shaped clamps 6, the other ends of the positioning steel bars 21 are welded on the top surface of the pile casing after elevation is adjusted, and the positioning steel bars 21 are uniformly arranged along the periphery of the pile.
Specifically, the number of the reinforcing steel bar heads is not less than 4. The number of the positioning bars 21 is not less than 4.
S43, selecting at least two hoisting points on the reinforcing steel bar reinforcing hoop 3 to hoist, and vertically lowering the glass fiber pile foundation reinforcement cage into the pile hole. Effectively preventing the deformation of the basic cage in the hoisting process. Whether the U-shaped clamps 6 are installed and fastened or not is checked one by one in the process of vertically lowering the glass fiber pile foundation reinforcement cage.
In this step, if the transportation of glass fiber pile foundation reinforcement cage is involved, the flat transport vehicle equal to the longest single-section cage is suitable to be adopted, the number of loading layers should not exceed 2 layers, the speed is controlled well in the transportation process, and pile foundation cage scattering caused by jolting and shaking is prevented.
And S5, pile foundation pouring is carried out, and the pile head is processed. Specifically, when the pile foundation is poured, the pouring height is controlled to be 50cm higher than the pile top elevation, pile top slurry is timely pumped out after the pile foundation is poured, pile top sediment and surface layer concrete are cleaned layer by layer, the pile top concrete is vibrated compactly by a vibrating rod after being cleaned up, and the pile top is roughened.
The glass fiber pile foundation reinforcement cage and the construction method thereof disclosed by the invention are applied to bridge engineering construction, and due to the light weight and the high strength, the labor intensity is reduced to a certain extent, and the burden of workers is reduced. In addition, the corrosion resistance of the glass fiber composite material is obviously higher than that of the traditional steel bar 21, the glass fiber composite material has better resistance to atmosphere, water, acid, alkali, salt with common concentration, various oils and solvents, the maintenance cost of the bridge in the later period can be greatly reduced by adopting a glass fiber-concrete structure, and social resources are saved.
The invention also discloses a glass fiber pile foundation reinforcement cage and a concrete case (Huidong county X211 line salt continent bridge reconstruction project) adopting the construction method. The specific contents are as follows:
overview of the engineering
The widened bridge of the Yanzhou bridge is located in Huang Tong town of Huidong county, Huizhou city, and has a full length of 454.8 meters and a width of 10 meters. The span combination is 25 multiplied by 16+3 multiplied by 13.5+9m, the upper structure adopts the pre-stressed concrete I-beam of the assembled post-tensioning method, and the bridge surface is continuous after the simple support. The lower structure adopts a double-column pier and drilling cast-in-place pile foundation, and the abutment adopts a pile-column type abutment. In order to prolong the service life of the bridge, the full bridge adopts marine concrete, and the upper section of the pile foundation, the tie beam, the stand column and the anti-collision guardrail adopt novel composite material glass fiber reinforced bars to replace common steel bars 21.
Construction conditions
The two-way 2% longitudinal slope on the original bridge has no navigation requirement, the elevation of the beam bottom is not lower than the elevation of the bottom of the nearby seawater pipe by 3.6m, and the maximum typhoon water level wave height is 3.4 m. In the transformation project, the salina bridge is divided into two steps. Taking the old bridge of the salina bridge as a left bridge, and performing reinforcement and reconstruction according to a detection result, wherein the width of the reconstructed bridge deck is 10 m; and (3) newly building a bridge with the width of 10m on the right side, and forming a (8.5+10) m separated bridge after the transformation is finished. The newly-built bridge is positioned on the inner sea side of the old bridge, and the distance between the new bridge and the old bridge is 8 m.
Evaluation of engineering results
The construction method of replacing the common steel bars 21 at the upper section of the pile foundation with the novel composite material glass fiber reinforcements is adopted in the engineering, so that the engineering investment is saved, the glass fiber reinforcements are light in self weight, the transportation cost is reduced, the labor intensity of workers is reduced, the corrosion resistance of the bridge is enhanced, the service life of the bridge structure is prolonged, the repair cost is reduced, and meanwhile, the potential safety hazard during construction is also reduced.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Although one embodiment of the present invention has been described in detail, the description is only for the purpose of illustrating the preferred embodiments 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 (9)
1. A glass fiber pile foundation reinforcement cage is characterized by comprising a glass fiber reinforcement cage (1) and a reinforcement cage (2) which are coaxially connected; the glass fiber reinforcement cage (1) comprises a plurality of glass fiber main reinforcements (11) which are uniformly distributed along the circumferential direction; the reinforcement cage (2) comprises a plurality of reinforcements (21) which are uniformly distributed along the circumferential direction;
the plurality of steel bars (21) correspond to the plurality of glass fiber main bars (11) one by one, and the corresponding steel bars (21) are connected with the glass fiber main bars (11) through U-shaped clamps (6);
a reinforcing steel bar reinforcing hoop (3) is arranged at one end of the glass fiber reinforcement cage (1) far away from the reinforcement cage (2); the reinforcing steel bar reinforcing hoop (3) is fixedly connected with a plurality of glass fiber main reinforcements (11); glass fiber reinforced hoops (4) are arranged at intervals along the direction from the reinforcing steel bar reinforced hoop (3) to the reinforcing steel bar cage (2); at the section of the glass fiber reinforcement cage (1), a glass fiber reinforcing hoop (4) is fixedly connected with a plurality of glass fiber main reinforcements (11); at the section of the steel reinforcement cage (2), the glass fiber reinforced hoop (4) is fixedly connected with a plurality of steel reinforcements (21);
wherein, the reinforcing steel bar reinforcing hoop (3) and a plurality of glass fiber stirrups are coaxially arranged.
2. A fiberglass pile foundation reinforcement cage according to claim 1, wherein the overlap length of the reinforcement bars (21) with the fiberglass main reinforcement bars (11) is not less than 1 m; and the number of the U-shaped clamps (6) between the single steel bar (21) and the single glass fiber main bar (11) is not less than 4.
3. The fiberglass pile foundation reinforcement cage according to claim 1, wherein a fiberglass spiral stirrup (5) is arranged outside the fiberglass reinforcement cage (1) and the reinforcement cage (2); the glass fiber spiral stirrup (5) and the glass fiber main reinforcement (11) as well as the glass fiber spiral stirrup (5) and the reinforcing steel bar (21) are bound by iron wires.
4. The construction method of the glass fiber pile foundation reinforcement cage is characterized by comprising the following steps:
s1, embedding the pile casing in a pit, leveling and adjusting the pile casing to ensure that the central vertical line of the pile casing coincides with the central line of the pile;
s2, drilling by using a drilling machine, and cleaning the hole position;
s3, manufacturing a glass fiber pile foundation reinforcement cage;
s4, lowering the glass fiber pile foundation reinforcement cage into a hole site;
and S5, pile foundation pouring is carried out, and the pile head is processed.
5. The construction method of the glass fiber pile foundation reinforcement cage according to claim 4, wherein the process of manufacturing the glass fiber pile foundation reinforcement cage comprises:
s31, taking a glass fiber main rib (11) and a steel bar (21), and fixing the glass fiber main rib (11) and the steel bar (21) by using a U-shaped clamp (6) to obtain a reference main rib;
s32, manufacturing a glass fiber reinforced hoop (4) and a reinforcing steel bar reinforced hoop (3) according to the design size;
s33, fixing the reference main bar, binding the reinforcing steel bar reinforcing hoop (3) and the plurality of glass fiber reinforcing hoops (4) on the reference main bar in sequence, and enabling the central axes of the reinforcing steel bar reinforcing hoop (3) and all the glass fiber reinforcing hoops (4) to be superposed on the same straight line;
s34, sequentially welding the rest glass fiber main reinforcements (11) and the steel bars (21) to the outer sides of the steel bar reinforced hoop (3) and the glass fiber reinforced hoop (4) one by one; controlling the glass fiber main reinforcements (11) and the reinforcing steel bars (21) to correspond one to one;
s35, fixing all the glass fiber main reinforcements (11) and the reinforcing steel bars (21) in one-to-one correspondence by utilizing the U-shaped clamp (6);
and S36, the glass fiber spiral stirrup (5) is wound on the outer sides of the glass fiber main reinforcement (11) and the reinforcing steel bar (21) and is fixed through binding.
6. The construction method of the glass fiber pile foundation reinforcement cage according to claim 4, wherein the process of lowering the glass fiber pile foundation reinforcement cage comprises the following steps:
s41, arranging protective layer control surfaces every 2m in the extending direction of the glass fiber pile foundation reinforcement cage, wherein each protective layer control surface comprises 4 roller type cushion blocks uniformly arranged along the periphery of the pile; in the circumferential direction, the roller type cushion blocks in the adjacent control surfaces are arranged in a staggered way by 45 degrees;
s42, uniformly welding reinforcing steel bar heads along the circumferential outer wall of the reinforcing steel bar hoop (3), and keeping a gap of 5-10mm between each reinforcing steel bar head and the inner wall of the pile casing; one end of a positioning steel bar is bound on a glass fiber main bar (11) through a U-shaped clamp (6), the other end of the positioning steel bar is welded on the top surface of the pile casing after the elevation is adjusted, and the positioning steel bar is uniformly arranged along the periphery of the pile;
s43, selecting at least two hoisting points on the reinforcing steel bar reinforcing hoop (3) for hoisting, and vertically lowering the glass fiber pile foundation reinforcement cage into the pile hole.
7. The method for constructing a glass fiber pile foundation reinforcement cage according to claim 6, wherein the number of the reinforcement heads is not less than four; the number of the positioning steel bars is not less than four.
8. The construction method of the glass fiber pile foundation reinforcement cage according to claim 6, wherein whether the U-shaped clamps (6) are installed and fastened is checked one by one during the process that the glass fiber pile foundation reinforcement cage is vertically lowered.
9. The construction method of the glass fiber pile foundation reinforcement cage according to claim 4, wherein during pile foundation pouring, the pouring height is controlled to be 50cm higher than the pile top elevation, pile top slurry is timely drawn out after pile foundation pouring is completed, pile top sediment and surface concrete are cleaned layer by layer, the pile top concrete is vibrated by a vibrating rod to be compact after being cleaned, and pile top roughening treatment is carried out.
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