CN206219985U

CN206219985U - A kind of pre-stress FRP concrete box type girder

Info

Publication number: CN206219985U
Application number: CN201620918263.5U
Authority: CN
Inventors: 付兵; 李丽娟; 方舒; 刘锋; 黃旭霖
Original assignee: Guangdong University of Technology
Current assignee: Guangdong University of Technology
Priority date: 2016-08-22
Filing date: 2016-08-22
Publication date: 2017-06-06
Anticipated expiration: 2026-08-22

Abstract

The utility model discloses a kind of pre-stress FRP concrete box type girder, concrete box girder outside wall surface is provided with FRP outer tubes, internal compressive region configures some FRP inner tubes, FRP internal tubes fill core concrete, concrete box type girder tensile region is provided with some prestressing apparatus, and main body concrete is perfused with inside concrete box type girder.The utility model on the outside of coagulation box beam by being provided with FRP outer tubes, ensure the globality of box beam and undertake Partial Shear, the core concrete of FRP internal tubes bears pressure and controls the destruction of beam, the prestressing apparatus of tensile region bear pulling force, each several part cooperative cooperating, it is ensured that beam has good ultimate bearing capacity.Meanwhile, beam inside sets hollow chamber, mitigates deadweight and the cost of beam.In addition, due to the use of prestressing apparatus and FRP, the utility model possesses the normal usage energy ductility that good, span ability is strong, endurance quality is superior and good, so as to promote application of the FRP material in civil engineering.

Description

A kind of pre-stress FRP-concrete box type girder

Technical field

The utility model is related to the construction applications such as bridge, more particularly to a kind of pre-stress FRP-concrete box type girder.

Background technology

Concrete box type girder is widely used in the infrastructure such as highway, railway because of excellent performance, form grace.Pass Using steel strand wires or reinforcing bar as tension part, its structural behaviour largely depends on steel strand wires to the concrete box type girder of system Or reinforcing bar.But when being used in the environment of high corrosion, the steel strand wires or reinforcing bar of susceptibility-to-corrosion easily cause its performance because of corrosion Substantially reduction, therefore the preservative treatment of complexity need to be carried out to it.If steel strand wires or reinforcing bar can not meet performance requirement because corroding Afterwards, also need to change it or consolidation process is carried out to box beam, the pipe that these maintenance measures greatly increase job facilities is supported Cost.

Fibre reinforced composites (FRP) are the new materials with the superior function such as lightweight, high-strength, corrosion-resistant, extensively General application structure field of reinforcement, is also progressively applied in the construction of new structure.FRP material is applied to concrete box type girder Build, the service life of job facilities can be obviously improved and pipe is reduced and form this.However, FRP material is to play fragile material, its Tension or stretching strain can occur fracture suddenly when reaching its ultimate tensile strength or strain, destructive process shows as obvious crisp Property, so that the destruction of common FRP- concrete box type girders is in obvious fragility.In addition, common FRP- concrete Beam rigidity is smaller, and span ability is not strong, it is difficult to be applied to longspan structure system.

Utility model content

Main purpose of the present utility model is to propose a kind of pre-stress FRP-concrete box type girder, it is intended to solve traditional reinforcing bar Steel Bars in Concrete Structure durability is not enough, the problem that span ability is not enough, common FRP muscle material ductility is poor, to promote FRP materials Expect the range of application in civil engineering.

To achieve the above object, the utility model proposes a kind of pre-stress FRP-concrete box type girder, the prestressing force FRP- concrete box type girder lateral surfaces are configured with FRP outer tubes, the pre-stress FRP-concrete box type girder inside compressive region configuration Some FRP inner tubes, the pre-stress FRP-concrete box type girder inside tensile region is provided with some prestressing apparatus, described FRP inner tubes fill core concrete, and main body concrete is poured in the FRP outer tubes.

Preferably, the prestressing apparatus include FRP pipes, FRP ropes and anchorage, and the FRP ropes are managed through the FRP Interior, FRP ropes described in the anchorage tensioning apply inward pressure with to the pre-stress FRP-concrete box type girder.

Preferably, the prestressing apparatus include bellows, FRP ropes and anchorage, and the FRP ropes are through the ripple In pipe, FRP ropes described in the anchorage tensioning apply inward pressure with to the pre-stress FRP-concrete box type girder.

Preferably, it is perfused with special cement slurry in the prestressing apparatus.

Preferably, the FRP outer tubes can be that the prefabricated outer tube of FRP materials or cloth-like FRP materials are wound in the concrete box The outer tube that type beam sidewall surfaces are formed.

Preferably, the core concrete is self-compacting concrete, and the main body concrete can be normal concrete, high-strength One of concrete, expansive concrete, self-compacting concrete, recovery aggregate concrete, flyash concrete, fiber concrete.

The technical solution of the utility model on the outside of coagulation box beam by being provided with FRP outer tubes, it is ensured that box beam Globality simultaneously undertakes Partial Shear, and the core concrete of FRP internal tubes bears pressure and controls the destruction of beam, tensile region it is pre- Power apparatus are answered to bear pulling force, each several part cooperative cooperating, it is ensured that beam has good ultimate bearing capacity.In addition, due to pre- Answer the use of power apparatus and FRP, the utility model possess normal usage can good, span ability is strong, endurance quality is superior and Good ductility, so as to promote application of the FRP material in civil engineering.

Brief description of the drawings

In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.

Fig. 1 is the axonometric drawing of the embodiment of the utility model one；

Fig. 2 is the viewgraph of cross-section of the embodiment of the utility model one；

Fig. 3 is the axonometric drawing of another embodiment of the utility model；

Fig. 4 is the viewgraph of cross-section of another embodiment of the utility model；

Fig. 5 is the internal structure schematic diagram of prestressing apparatus of the present utility model.

Drawing reference numeral explanation：

The realization of the utility model purpose, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.

Specific embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, belongs to the scope of the utility model protection.

If it is to be appreciated that related in the utility model embodiment directionality indicate (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality indicates to be only used for explaining relative between each part under a certain particular pose (as shown in drawings) Position relationship, motion conditions etc., if the particular pose changes, directionality indicates also correspondingly to change therewith.

If in addition, relate to the description of " first ", " second " etc. in the utility model embodiment, should " first ", " the Two " description etc. is only used for describing purpose, and it is not intended that indicating or implying its relative importance or implicit indicate meaning The quantity of the technical characteristic for showing.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one Individual this feature.In addition, the technical scheme between each embodiment can be combined with each other, but must be with ordinary skill Personnel can be implemented as basis, when the combination appearance of technical scheme is conflicting or cannot realize it will be understood that this technical side The combination of case does not exist, not within the protection domain of the utility model requirement yet.

The utility model proposes a kind of concrete box type girder.

Referring to Fig. 1 to Fig. 5, pre-stress FRP of the present utility model-concrete box type girder outer side surface is provided with FRP outer tubes 1, Pre-stress FRP-concrete box type girder inside compression side is provided with some FRP inner tubes 2, and the wherein inside of FRP inner tubes 2 is filled with core Concrete 5；Pre-stress FRP-concrete box type girder inside tension side is provided with some prestressing apparatus 6, in addition pre-stress FRP- Main body concrete 3 is perfused with inside concrete box type girder as agent structure filler.

In above-described embodiment of the present utility model, prestressing apparatus 6 include anchorage 61, FRP pipes 62 and FRP ropes 64, Wherein FRP ropes 64 can be wound composition for a plurality of FRP bars, FRP ropes 64 in the actual installation through in FRP pipes 62, anchorage 61 two ends for being anchored on FRP ropes 64.After anchorage 61 is anchored in FRP ropes 64, pre-stress FRP-concrete box type girder is imposed to Interior pressure, special cement slurry 63 is perfused with inside the prestressing apparatus 6 after anchoring, and the special cement slurry 63 contains water Mud, superplasticizer and retarding agent, wherein superplasticizer and retarding agent are respectively the 3% of cement constituent weight.In the present embodiment, it is filled in Core concrete 5 in FRP inner tubes 2 is self-compacting concrete, and the main body concrete 3 for being filled in FRP outer tubes 1 can be common mixed Solidifying soil, high-strength concrete, expansive concrete, self-compacting concrete, recovery aggregate concrete, flyash concrete, fiber coagulation One of soil.

In above-described embodiment of the present utility model, by being provided with FRP outer tubes 1 on the outside of coagulation box beam, it is ensured that pre- The globality of stress FRP- concrete box type girders simultaneously undertakes Partial Shear, and the core concrete 5 inside FRP inner tubes 2 bears pressure And the destruction of beam is controlled, the prestressing apparatus 6 of tensile region bear pulling force, each several part cooperative cooperating, it is ensured that beam has good pole Limit bearing capacity.The FRP ropes 64 formed by using winding are reaching same load action to replace steel strand wires or reinforcing bar Under, it is to avoid because steel strand wires or reinforcing bar it is perishable and caused by concrete box type girder structural behaviour reduction, so as to promote FRP material Application in civil engineering.

In another embodiment of the present utility model, prestressing apparatus 6 include bellows, FRP ropes 64 and anchorage 61, Through in bellows, anchorage 61 is anchored on the two ends of FRP ropes 64 and pre-stress FRP-concrete box type girder is imposed FRP ropes 64 Inward pressure.In the present embodiment, the inside of pre-stress FRP-concrete box type girder is fixed in advance using bellows, can prevent Prestressing apparatus 6 prevent FRP ropes 64 from sliding during actually anchoring, so as to improve the reliability of anchoring.

In another embodiment of the present utility model, it is cloth-like FRP to be arranged at the FRP outer tubes 1 outside concrete box type girder Material is wound in the outer tube of concrete box type girder sidewall surfaces formation.When concrete box type girder pour finish after, can directly make Wet combining method is used, FRP cloth is wound and the lateral wall of concrete box type girder is pasted on, so that in actual production, further Simplification of flowsheet.

Before concrete box type girder is produced, core concrete 5 is poured in FRP inner tubes 2, wherein pouring in FRP The particle diameter of the aggregate in pipe 2 should be less than the internal diameter a quarter of FRP inner tubes 2, and pour the concrete in FRP inner tubes 2 The concrete of self-compaction is should be, is poured and must be carried out after finishing maintenance in minimum 7 days, ensuring that the concrete of FRP inner tubes 2 possesses one Follow-up production can be carried out after determining intensity.

After core concrete 5 in FRP inner tubes 2 possesses some strength, FRP outer tubes 1 are fixed in advance, and will be prefabricated Hollow chamber template, the interior FRP inner tubes 2 and bellows or FRP pipes 62 for being filled with core concrete 5 be fixed on outside FRP in advance Correspondence position in pipe 1, during fixing in advance, using concrete pad or can enter line position using a small amount of cableway Determination is put, wherein hollow chamber template is positioned in concrete box type girder, to form hollow box in concrete box type girder Room 4, so as to mitigate the overall weight of concrete box type girder.

After the part being arranged in FRP outer tubes 1 determines relevant position, by one end sealing of FRP outer tubes 1, and never seal Solid one end can select normal concrete, high-strength coagulation to main body concrete, wherein main body concrete 3 is poured in FRP outer tubes 1 One of soil, expansive concrete, self-compacting concrete, recovery aggregate concrete, flyash concrete, fiber concrete are poured Build, then start maintenance in certain hour.

After main body concrete 3 reaches predetermined intensity, FRP ropes 64 are penetrated in FRP pipes 62 or bellows, in anchor Gu before, special connector is connected in FRP pipes 62 or bellows, to ensure the seal of pipeline.P-type extruding anchor is used during anchoring Tool 61, profile wire lining ring and extruded sleeve are installed in the end of FRP ropes 64, after extruded sleeve is squeezed through into nib using special purpose extrusion press, Produce it to be plastically deformed and FRP ropes 64 of holding with a firm grip, there is no any space between extruded sleeve and FRP ropes 64, form reliable anchoring. When the strand quantity of a FRP rope 64 is more, when setting monoblock billet is had any problem, billet can be divided into some pieces.Opening Before drawing pre-stress FRP rope 64, the intensity data of prestressed girder concrete test block is checked, wanted with ensuring that elastic modelling quantity reaches design Ask, must confirm whether concrete strength reaches tensioning intensity requirement before anchoring, and check template whether there is sinkage, finally make Tensioning is carried out with jack.

After tensioning is finished, the part that excision FRP ropes 64 expose, using shrinkage-free cement mortar sealing off and covering anchorage, by the He of anchorage 61 FRP ropes 64 after parcel, special cement slurry 63 are irrigated to the prestressing apparatus 6 after sealing off and covering anchorage comprehensively.Before mud jacking, duct and two ends Must be sealed using airtight anchor cap, and without stone, sand and other debris in duct, it is ensured that duct is unimpeded, cleaning, dry and comfortable, while clearly Grout hole on reason anchor plate, it is ensured that grout hole and the unimpeded connection in duct, it is determined that extracting vacuum end and grouting end out, installs and draws Pipe, ball valve and joint, and check its function, it is ensured that construction safety, smoothly.Wherein special cement slurry 63 contains cement, super modeling Agent and retarding agent, superplasticizer and retarding agent respectively account for the 3% of the cement constituent weight of special cement slurry 63, finally carry out a timing Interior maintenance.

Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, It is every utility model of the present utility model design under, the equivalent structure made using the utility model specification and accompanying drawing content Conversion, or directly/be used in other related technical fields indirectly and be included in scope of patent protection of the present utility model.

Claims

1. a kind of pre-stress FRP-concrete box type girder, it is characterised in that the pre-stress FRP-concrete box type girder lateral surface Be configured with FRP outer tubes, the pre-stress FRP-concrete box type girder inside compressive region configures some FRP inner tubes, it is described it is pre- should Power FRP- concrete box type girders inside tensile region is provided with some prestressing apparatus, and the FRP inner tubes fill core concrete, institute State and main body concrete is poured in FRP outer tubes.

2. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that the prestressing apparatus include FRP pipes, FRP ropes and anchorage, the FRP ropes are interior through FRP pipes, and FRP ropes are with to described described in the anchorage tensioning Pre-stress FRP-concrete box type girder applies inward pressure.

3. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that the prestressing apparatus include ripple Line pipe, FRP ropes and anchorage, through in the bellows, FRP ropes are with to described described in the anchorage tensioning for the FRP ropes Pre-stress FRP-concrete box type girder applies inward pressure.

4. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that perfusion in the prestressing apparatus There is special cement slurry.

5. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that the FRP outer tubes can be FRP materials The prefabricated outer tube of matter or cloth-like FRP materials are wound in the outer tube that the concrete box type girder sidewall surfaces are formed.

6. pre-stress FRP-concrete box type girder as claimed in claim 1, it is characterised in that the core concrete is from close Real concrete, the main body concrete can be normal concrete, high-strength concrete, expansive concrete, self-compacting concrete, recovery One of aggregate concrete, flyash concrete, fiber concrete.