CN201043326Y

CN201043326Y - Composite fibre hollow grouting anchoring-bolt

Info

Publication number: CN201043326Y
Application number: CNU2007200793225U
Authority: CN
Inventors: 张一峰
Original assignee: CHENGDU XINTAILONG ENGINEERING MATERIAL Co Ltd
Current assignee: CHENGDU XINTAILONG ENGINEERING MATERIAL Co Ltd
Priority date: 2007-04-26
Filing date: 2007-04-26
Publication date: 2008-04-02
Anticipated expiration: 2017-04-26

Abstract

The utility model discloses a composite fiber hollow grouting bolt, relates to a building article, and is to solve the problems of failure to resist erosion, large weight, inconvenience for manufacture, transportation and installation of reinforced bolts, and to overwhelm the defects of high cost, large friability, and low shear resistance of FRP bolts. The middle of the grouting bolt is in hollow structure, and the bolt is in three-layer structure. The inner layer of the utility model is a plastic pipe; the intermediate layer is a seamless steel pipe enclosed on the plastic pipe; the outer layer is a fiber and resin mixed layer enclosed on the seamless steel pipe. The resin is either vinyl resin, or ethoxyline resin, or unsaturated polyester resin. The fiber is one of, mixture of two of, or mixture of three of carbon fiber, aramid fiber and fiber glass. The bolt is not only applicable for ordinary buildings, bridges, railway structures, hydraulic structures and other structures, but also applicable for corrosive environment and cold environment, and structures with special environmental requirements in terms of electromagnetic interference.

Description

Combined type fiber hollow grouting anchor

Technical field

The utility model relates to a kind of building product, and particularly a kind of worker, civilian construction, geotechnical engineering of being widely used in is particularly useful for corrosive atmosphere, severe cold environment, and the Composite Bolt that electromagnetic interference is had the specific (special) requirements environment.

Background technology

Concrete structure generally all is to be reinforcing material with the reinforced anchor bolt.But when the environment of be applied to have aggressivity (highway bridge of handling with deicer salts as severe cold area, seashore building, hydro-structure, harbor work's structure, chemical industry factory building etc.) or exposure property, under the suitable condition of temperature and humidity, carbonization of concrete and muriatic intrusion, make concrete neutralisation gradually, rebar passivation film destroyed and begin the corrosion, finally cause concrete structure to fail too early, structural bearing capacity descends, produce potential safety hazard, the damage of structure be will cause when serious, serious life and property loss caused.

For addressing the above problem, since last century the mid-80, American-European and Japan, Germany begin to adopt this novel artificial fibrous material of fiber reinforced plastics bar (being FRP) to replace reinforcing bar, have all obtained more achievement at aspects such as experimental study and engineering application.It is to be reinforcing material with the fiber, is matrix material with synthetic resin, and mixes an amount of assistant and form through pultrusion technology and necessary surface treatment.

All there is deficiency in above-mentioned two kinds of anchor poles.

The shortcoming of reinforced anchor bolt:

1, the anti-corrosion protection of steel anchor rod makes that the anchoring engineering workload is big, consumptive material is many, many complexity;

2, the steel anchor rod quality is big, makes, transports and install difficulty;

3, steel have a deadly defect under cryogenic conditions, are exactly low temperature " cold short " phenomenon.A lot of steel construction piece brittle fracture malicious events take place in the domestic and international actual engineering.

The shortcoming of FRP anchor pole:

1, the FRP anchor pole has dimensional effect, and promptly because shear lag, the stress that the stress that is subjected near the fiber at FRP anchor pole section center does not have the fiber of FRP anchor pole external surface to be subjected to is big.This phenomenon causes the intensity of major diameter FRP anchor pole and efficient to reduce;

2, because the FRP anchor pole along the fragility of cross-wise direction, determines that the intensity of FRP anchor pole is very difficult;

3, the modulus of elasticity of FRP anchor pole is low, and elongation per unit length is little, is not suitable for using in the very big concrete structure of prestressing force;

4, the shear strength of FRP anchor pole is very low, is no more than 10% of its tensile strength usually;

5, the FRP anchor pole is not so good as reinforced anchor bolt homogeneous so, because the defective of product processing or raw material itself forms " weak " fiber in the inner meeting of FRP anchor pole, its final strength often also depends on these " weak " fibers.

6, cost is higher.

7, poor heat stability.

The utility model content

The purpose of this utility model is to solve that reinforced anchor bolt is not corrosion-resistant, quality big, be not easy to the problem of making, transporting and installing, overcome FRP anchor pole cost height, fragility is big, shear strength is low deficiency, provide a kind of and can replace reinforcing bar and FRP anchor pole, can be widely used in various workers, civilian construction, geotechnical engineering, be specially adapted to the composite fibre hollow grouting anchor in anticorrosion, antirust demanding building and the engineering.

In order to realize the purpose of this utility model, adopt following technical scheme:

Combined type fiber hollow grouting anchor, middle part are hollow-core construction, and described anchor pole is a three layer construction, and nexine is a plastic pipe, and the intermediate layer is the seamless steel pipe that is enclosed within on the plastic pipe, and be outer for being enclosed within fiber and the mixed with resin layer on the seamless steel pipe.

Described resin is a kind of in vinylite, epoxy resin, the unsaturated polyester resin.The effect of resin is that fiber and seamless steel pipe are bonded together, and makes fiber stressed evenly, and forms needed goods or member shape.Resin completely cuts off seamless steel pipe and external environment condition simultaneously, can prevent the seamless steel pipe corrosion.Resin is firmly combining fiber and seamless steel pipe, makes fiber and seamless steel pipe stressed jointly, prevents that whole anchor pole from causing local pressure because of discontinuity, ruptures.

Described fiber is a kind of or any two kinds mixture in carbon fiber, aramid fiber, the glass fiber or three's mixture.The tensile strength of these several fibers and modulus of elasticity are all higher, and the coefficient of expansion is little, and they and seamless steel pipe together become the bearing structure of combined type anchor pole, have improved the mechanical property of anchor pole greatly.

After the utility model adopts said structure, have following beneficial effect:

But 1, keep on the basis of original slip casting function, tensile strength improves, and can surpass 2500MPa, and before reaching tensile strength, does not almost have plastic strain to produce;

2, corrosion resistance is good, can resist the corrosion of chlorion and low pH value solution, and the corrosivity of especially anti-carbon compound and chlorine compound is stronger.The corrosion problem that does not have steel is applicable to the demanding railway construction bridge of weatherability, tunnel and slope retaining, harbour, military affairs etc.;

3, proportion is less, has reduced cost of transportation, has reduced the installation and processing time in the working site, and construction is convenient;

4, high-strength light, anti-seismic performance is good, can obviously improve structural seismic performance under the prerequisite that does not increase construction costs;

5, modulus of elasticity height is adapted at using in the big concrete structure of prestressing force;

6, have good elastic performance, go back resilient after the snare moderate finite deformation takes place, plastic strain is little, and the distortion that helps after structure overloads accidentally recovers;

7, seamless steel pipe application has therein improved shear strength greatly, is about 50% of its hot strength.And the shear strength of traditional FRP anchor pole only is 5～20% of its hot strength;

8, the material adhesion is strong, and hot expansion system is more near cement, and to combine bond stress stronger with cement;

9, anti-magnetic property is good, is applicable to antimagnetic demanding engineering structuress such as magnetic suspended railway;

10, fire-retardant, antistatic, can not produce spark with metal bump;

11, the poor thermal conductivity of resin can protect the seamless steel pipe performance not to be subjected to the influence of environment temperature, has overcome the defective of reinforced anchor bolt low temperature " cold short " to a certain extent;

12, has good designability.Composite Bolt of the present utility model belongs to artificial material, can be by using different fibrous material, fiber content, and the seamless steel pipe of different model is designed the anchor pole that various intensity indexs, modulus of elasticity and property require;

13, easy construction can be produced the nonstandard product of various different cross-sectional and length according to different requirements, and site operation cuts easily;

14, cost is lower, adds seamless steel pipe therein, has reduced the consumption of fibrous material, and cost is lower than FRP Composite Bolt.Though cost of the present utility model, is considered its corrosion-resistant cheap maintenance cost that brings than reinforced anchor bolt height, its comprehensive benefit is higher than reinforced anchor bolt

As seen, adopt the utility model of said structure, be not only applicable to common building, bridge, railway construction structure, hydro-structure and other structure, also be applicable to corrosive atmosphere, severe cold environment, and the works that electric and magnetic interference is had the specific (special) requirements environment.Have application fields and development prospect.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Number in the figure, the 1st, the mixed layer of fiber and resin, the 2nd, seamless steel pipe, the 3rd, plastic pipe.

The specific embodiment

Below in conjunction with specific embodiments and the drawings the utility model is further described.

Embodiment 1: as shown in Figure 1, combined type fiber hollow grouting anchor comprises three layer construction, and outermost one deck is the mixed layer 1 of non-twist glass fiber of alkali-free and epoxy resin, and the intermediate layer is a seamless steel pipe 2, and the inside one deck is the plastic pipe 3 of hollow.

The plastic pipe 3 of hollow can slip casting, and outer field fiber and mixed with resin layer 1 can be corrosion-resistant, improves tensile strength.

This anchor pole adopts pultrusion molding process.With the seamless steel pipe is matrix material, and the non-twist glass fiber of high-intensity alkali-free is a reinforcing material.The plastic pipe hot jacket is gone in the seamless steel pipe, fiber bundle is fed continuously by creel, process epoxide-resin glue groove is with fiber impregnation, and mix an amount of assistant, together enter preforming mould with seamless steel pipe then, unnecessary resin and bubble are discharged, enter shaping mould gel, curing again.Goods after the curing are continuously extracted from mould by tractor, at last by the cutting off machine customized cut-off.

Embodiment 2: structure and preparation method such as embodiment 1, use therein fiber are carbon fiber, and resin is a vinylite.

Embodiment 3: structure and preparation method such as embodiment 1, use therein fiber are aramid fiber, and resin is a unsaturated polyester resin.

Embodiment 4: structure and preparation method such as embodiment 1, use therein fiber are the mixture of glass fiber and aramid fiber, and resin is an epoxy resin.

Claims

1. combined type fiber hollow grouting anchor, the middle part is a hollow-core construction, it is characterized in that: described anchor pole is a three layer construction, and nexine is a plastic pipe, and the intermediate layer is the seamless steel pipe that is enclosed within on the plastic pipe, and is outer for being enclosed within fiber and the mixed with resin layer on the seamless steel pipe.

2. combined type fiber hollow grouting anchor according to claim 1 is characterized in that: described resin is a kind of in vinylite, epoxy resin, the unsaturated polyester resin.

3. combined type fiber hollow grouting anchor as claimed in claim 1 or 2 is characterized in that: described fiber is a kind of or any two kinds mixture in carbon fiber, aramid fiber, the glass fiber or three's mixture.