CN102261166A - Fiber reinforced polymer (FRP) sheet anchor device and anchoring method thereof - Google Patents

Abstract

The invention discloses a fiber reinforced polymer (FRP) sheet anchor device and an anchoring method thereof, and relates to an anchor device used for an engineering structure in the field of high-performance polymer structure materials. The FRP sheet anchor device comprises a sheet (10), an upper anchor plate (20), a lower anchor plate (30) and a bolt, wherein the sheet (10) passes through a corrugated pipe (50) and is placed between the upper anchor plate (20) and the lower anchor plate (30); the upper anchor plate (20) and the lower anchor plate (30) clamp the sheet (10) totally; and the bolt (40) passes through the plate hole (25) of the upper anchor plate (20) and the lower anchor plate (30) to closely anchor the upper anchor plate (20) and the lower anchor plate (30). The anchor device cannot be rusted, is placed in a totally non-metal engineering structure with an FRP sheet, has durability, light weight, and high electromagnetic insulativity, and is used for enhancing the spanning capability of the structures such as bridges and the like.

Description

FRP sheet material ground tackle and anchoring process thereof

Technical field

The present invention relates to the engineering structures ground tackle in the high performance polymer structural meterials field, relate in particular to a kind of FRP (Fiber Reinforced Polymer, fibre-reinforced high molecular polymer) sheet material ground tackle and anchoring process thereof.

Background technology

The deadly defect that steel are done structural meterials has: at first, corrosion has changed the chemical composition of structural meterials, cause the original mechanical property of steel to reduce even forfeiture, so the corrosion problem has a strong impact on durability of structures; Secondly, along with economy and the reach of science, people are more higher to the demand of constructional materials, and girder steel, muscle (steel wire) are difficult to meet the demands; The 3rd, steel are consumable resources, and are non-renewable, and from the long-range development of the mankind, using FRP to substitute steel is inexorable trend as structure material.

FRP has not corrosion, nonmagnetic, good characteristic such as electrical insulating property good, in light weight and intensity height; In addition, FRP does not have tangible creep, lax; Its particular performances and DEVELOPMENT PROSPECT have widely been compared with steel.Therefore for adopting FRP to make the prestressing force sheet, its anchor system and the ground tackle of the presstressed reinforcing steel that adopts steel to make have bigger different, need to develop and prestress anchoraging mode and ground tackle that the FRP sheet material adapts.

At FRP presstressed reinforcing steel material, some corresponding ground tackles have been developed both at home and abroad.2004, University Of Chongqing's Zhuo waited quietly developing the waveform ground tackle in order to anchoring FRP sheet material or FRP cloth material that adopts the Q235 steel to make, and has registered utility model patent (ZL02244587.0); Patent ground tackle (the ZL02242609.4 of Southeast China University; ZL02242610.8; ZL02242611.6; ZL02242612.4) and the patent ground tackle (ZL02252685.4 of Liuzhou Ou Weimu company; ZL03243747.6) all used metal parts in various degree, and, can not give full play to the unique advantage of FRP owing to metal parts meeting corrosion itself.

Summary of the invention

Purpose of the present invention just is to overcome the shortcoming and defect that prior art exists, and a kind of FRP sheet material ground tackle and anchoring process thereof are provided.

The object of the present invention is achieved like this:

This FRP sheet material ground tackle comprises sheet material, last anchor slab, following anchor slab and bolt;

Sheet material places between anchor slab and the following anchor slab, and last anchor slab and following anchor slab be the sheet material clamping that coincide, and it is tight with following anchor slab anchoring that the plate hole that bolt passes anchor slab and following anchor slab will be gone up anchor slab.

Operating principle of the present invention is:

The bonding force of upper and lower anchor slab by frictional force between extruding force, anchor slab and the sheet material of high-strength bolt and structure glue forms the anchoring to the FRP sheet material;

The corrugated contact surface increases the contact surface of sheet material and ground tackle, thereby increases frictional force;

The fastening force of bolt clamps ground tackle and sheet material, increases frictional force and bonding force;

Ground tackle forever places engineering structures, keeps sheet material to be in pre-stressed state for a long time, the creep of ground tackle itself and lax meet the structural life-time requirement (for example: bridge 40 years, building construction 100 years, or the like).

The present invention has following advantage and good effect:

1. not corrosion and FRP sheet material place complete nonmetallic engineering structures together, have durability;

2. in light weight, be used for structures such as bridge, strengthen span ability;

3. solenoid isolation is good, is used for geomagnetic observatory etc. and can avoids magnetic interference fully; Be used for radar station etc., can avoid reflection of electromagnetic wave.

Description of drawings

Structure longitudinal sectional view when Fig. 1 is stretch-draw of the present invention;

Fig. 2 .1, Fig. 2 .2 are respectively structure master, the lateral views of sheet material;

Fig. 3 is the structural representation of upper and lower anchor slab;

Fig. 4 is the structural representation of bolt;

Fig. 5 utilizes stretch-draw machinery FRP sheet material ground tackle to be carried out the work schematic diagram of anchoring.

Wherein:

10-sheet material;

20-upward anchor slabs, plate hole-25;

30-following anchor slab, plate hole-25;

40-bolt, 41-head, 42-screw rod, 43-nut, 44-pad;

50-bellows;

60-stretch-draw machinery,

61-tension clamp, 611-clamping plate, 612-wedge, 613-securing member,

62-dowel bar,

63-jack.

The specific embodiment

Below in conjunction with accompanying drawing and example in detail:

One, FRP sheet material ground tackle

1, overall

As Fig. 1, the present invention includes sheet material 10, last anchor slab 20, following anchor slab 30 and bolt 40;

Sheet material 10 places between anchor slab 20 and the following anchor slab 30, and last anchor slab 20 and following anchor slab 30 be sheet material 10 clampings that coincide, and it is tight with following anchor slab 30 anchorings that the plate hole 25 that bolt 40 passes anchor slab 20 and following anchor slab 30 will be gone up anchor slab 20.

When needing, be connected with bellows 50 at ground tackle two, sheet material 10 passes bellows 50.

2, functional part

1) sheet material 10

As Fig. 2 .1, Fig. 2 .2, sheet material 10 or be the FRP sheet material, or be FRP cloth material, be a kind of thin-walled sheet banded structure.

Its function is by the tension member of anchoring as composite construction (for example prestressed concrete).

2) go up anchor slab 20

As Fig. 3, last anchor slab 20 is a kind of FRP chunks, is symmetrically arranged with 4 plate holes 25 on it;

Last anchor slab 20 upper surfaces are smooth flat;

Last anchor slab 20 soffits are corrugated, waveform size or big and wave number is thinner, waveform size or less and wave number is closeer;

Single waveform angle is generally 75 °.

Its function is with following anchor slab 30 clamping sheet materials 10, provides snap-in force, frictional force and bonding force to sheet material 10, realizes good anchoring effect.

3) anchor slab 30 under

As Fig. 3, following anchor slab 30 is a kind of FRP chunks, is symmetrically arranged with 4 plate holes 25 on it;

Following anchor slab 30 soffits are smooth flat;

Following anchor slab 30 upper surfaces are corrugated, waveform size or big and wave number is thinner, waveform size or less and wave number is closeer;

Single waveform angle is generally 75 °.

Its function is with last anchor slab 20 clamping sheet materials 10, provides snap-in force, frictional force and bonding force to sheet material 10, realizes good anchoring effect.

4) bolt 40

As Fig. 4, bolt 40 is a kind ofly to have externally threaded cylinder by head 41 and screw rod 42() securing member of the FRP of being material system dimerous, need also need use pad 44 sometimes with nut 43() cooperate, be used to be fastenedly connected two parts that have through hole.

Its function provides enough extruding forces, makes anchor slab 20 and following anchor slab 30 clampings tightr, improves anchoring effect.

5) bellows 50

As Fig. 1, bellows 50, its cross section is generally rectangle.Bellows 50 sometimes need not, such as: apply external prestressing, then without bellows 50.

Its function at first is to pass by sheet material 10 at pipeline of the inner formation of concrete structure, so that implement " post stretching " prestressed stretch-draw; Secondly behind prestressed stretch-draw, need mud jacking or infusion epoxy resin, with fixing prestressing force sheet material, bellows 50 is transmission pipelines of slurry or epoxy resin sizing material at this moment.

Two, the anchoring process of FRP sheet material ground tackle

1. settle ground tackle respectively at the two ends of sheet material 10, an end is a fixed end, and the other end is the tension working end, and the sheet material 10 of fixed end does not expose, and the sheet material 10 of tension working end should expose enough active lengths;

2. the fixed end to sheet material 10 carries out anchoring, and the fixed end that is about to sheet material 10 places between the upper and lower anchor slab 20,30, tights a bolt 40 again;

3. settle stretch-draw machinery 60 in the stretch-draw working end of sheet material 10

As Fig. 5, stretch-draw machinery 60 comprises tension clamp 61, dowel bar 62 and the jack 63 that connects successively; Tension clamp 61 is made up of clamping plate 611, wedge 612 and securing member 613;

Before stretch-draw, the stretch-draw working end of sheet material 10 is solidified into an integral body with wedge 612 gluings, with securing member 613 clamping plate 611 are fastened wedge 612;

Use jack 63 to carry out stretch-draw by the stretch-draw working end of 62 pairs of sheet materials 10 of dowel bar, the stretch-draw working end of sheet material 10 anchor slab 20 and 30 slippages of following anchor slab on lax, reach predetermined stress after, tight a bolt 40 again;

4. hold the lotus certain hour according to the prestressed stretch-draw operational procedure, then unloading;

5. remove stretch-draw machinery 60, amputate the sheet material 10 that exposes the stretch-draw working end, smear high performance resin again;

6. the continuous member slit all with concrete or high performance resin pouring structure outward appearance, is perhaps filled in fixed end and tension working end, and ground tackle is embedded in the structure.

This shows,, make the anchor system of the ground tackle formation at sheet material 10 and two ends, after unloading, rely on frictional force, snap-in force and bonding force to reach good anchoring effect according to above-mentioned anchoring process.

Claims (6)

1. FRP sheet material ground tackle is characterized in that:

Comprise sheet material (10), last anchor slab (20), following anchor slab (30) and bolt (40);

Sheet material (10) places between anchor slab (20) and the following anchor slab (30), last anchor slab (20) and following anchor slab (30) to be sheet material (10) clamping that coincide, and the plate hole (25) that bolt (40) passes anchor slab (20) and following anchor slab (30) respectively will go up anchor slab (20) and following anchor slab (30) anchoring is tight.

2. by the described a kind of FRP sheet material ground tackle of claim 1, it is characterized in that:

Be connected with bellows (50) in the termination of ground tackle, sheet material (10) passes bellows (50).

3. by the described a kind of FRP sheet material ground tackle of claim 1, it is characterized in that:

Described sheet material (10) or be the FRP sheet material, or be FRP cloth material, be a kind of thin-walled sheet banded structure.

4. by the described a kind of FRP sheet material ground tackle of claim 1, it is characterized in that:

Last anchor slab (20) is a kind of FRP chunk, is symmetrically arranged with 4 plate holes (25) on it;

Last anchor slab (20) upper surface is a smooth flat;

Last anchor slab (20) soffit is corrugated, waveform size or big and wave number is thinner, waveform size or less and wave number is closeer.

5. by the described a kind of FRP sheet material ground tackle of claim 1, it is characterized in that:

Following anchor slab (30) is a kind of FRP chunk, is symmetrically arranged with 4 plate holes (25) on it;

Following anchor slab (30) soffit is a smooth flat;

Following anchor slab (30) upper surface is corrugated, waveform size or big and wave number is thinner, waveform size or less and wave number is closeer.

6. by the anchoring process of the described a kind of FRP sheet material ground tackle of claim 1, it is characterized in that comprising the following steps:

1. settle ground tackle respectively at the two ends of the sheet material (10) of designated length, an end is a fixed end, and the other end is the tension working end, and the sheet material of fixed end (10) does not expose, and the sheet material of tension working end (10) should expose enough active lengths;

2. the fixed end to sheet material (10) carries out anchoring, and the fixed end that is about to sheet material (10) places between anchor slab (20) and the following anchor slab (30), and (40) again tight a bolt;

3. settle stretch-draw machinery (60) in the stretch-draw working end of sheet material (10), stretch-draw machinery (60) comprises and connects tension clamp (61), dowel bar (62) and jack (63) successively; Tension clamp (61) is made up of clamping plate (611), wedge (612) and securing member (613);

Before stretch-draw, the stretch-draw working end of sheet material (10) is solidified into an integral body with wedge (612) gluing, with securing member (613) clamping plate (611) are fastened wedge (612);

Use jack (63) stretch-draw to be carried out in the stretch-draw working end of sheet material (10) by dowel bar (62), the stretch-draw working end of sheet material (10) is slippage between anchor slab (20) and following anchor slab (30) on lax, (40) again after reaching predetermined stress, tight a bolt;

4. hold the lotus certain hour according to the prestressed stretch-draw operational procedure, then unloading;

5. remove stretch-draw machinery (60), amputate the sheet material (10) that exposes the stretch-draw working end, smear high performance resin again;

6. the continuous member slit all with concrete or high performance resin pouring structure outward appearance, is perhaps filled in fixed end and tension working end, and ground tackle is embedded in the structure.

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