CN204252572U - A kind of ruggedized construction of outer side bar concrete structure - Google Patents

Abstract

The utility model discloses a kind of ruggedized construction of outer side bar concrete structure, the medial surface of described outer side bar concrete structure is set to ruggedized construction face, described ruggedized construction comprises reinforcing steel beam, described reinforcing steel beam is connected on described ruggedized construction face by screw bolt reinforcing, and be provided with gap between described reinforcing steel beam and described ruggedized construction face, anchoring colloid layer is provided with in described gap, not needing to destroy the original insulation layer of highrise building alien invasion and decorative layer just can the outer side bar of reinforced concrete, and original structure load bearing beam power is increased substantially.

Description

A Reinforcement Structure of External Beam Concrete Structure

technical field

The utility model relates to a reinforcement structure, in particular to a reinforcement structure of an outer beam concrete structure.

Background technique

During the service period of the building structure, with the passage of time, the use function will be reduced due to deterioration and damage, or the project cannot be used normally due to technical limitations and changes in use function. If we can scientifically analyze the law and degree of this deterioration and damage, and take effective measures in time, the damage process of the structure can be delayed and the service life of the structure can be extended.

In the reinforcement construction, this situation is often encountered: the bearing capacity of the concrete outer beam is insufficient, and the traditional reinforcement methods such as pasting carbon fiber cloth, pasting steel plates, externally pasting angle steel and enlarging the cross-section will all affect the original structure's facade. The insulation layer and decoration layer cause damage, and the repair cost is relatively large, which is not very economical.

Contents of the invention

In order to solve the above-mentioned technical problems, the purpose of the invention of the utility model is to provide a reinforcement structure of the concrete structure of the outer beam, which can strengthen the outer beam of the concrete without destroying the original insulation layer and decorative layer of the facade of the high-rise building, so that the original structural beam The bearing capacity is greatly improved.

In order to achieve the above-mentioned purpose of the invention, the utility model provides the following technical solutions: a reinforced structure of the concrete structure of the outer edge beam, the outer surface of the concrete structure of the outer edge beam is provided with a decorative insulation layer, and the inner surface of the concrete structure of the outer edge beam is set as Reinforce the structure surface, the reinforcement structure includes a reinforcement steel beam, the reinforcement steel beam is anchored to the reinforcement structure surface by chemical bolts, and a gap is provided between the reinforcement steel beam and the reinforcement structure surface, the An anchor colloid layer is arranged in the gap.

In a further technical solution, the anchoring colloidal layer is a YZJ-3 perfusion structural colloidal layer.

In a further technical solution, the reinforcement structure surface is provided with bolt holes, and the bolts are chemical bolts placed in the bolt holes.

In a further technical solution, the width of the gap is 2-3mm.

In a further technical solution, iron wires supported between the reinforced steel beam and the reinforced structural surface are arranged in the gap.

In a further technical solution, the edge of the gap is sealed with an epoxy resin mastic layer, and a glue injection nozzle and an air vent are left on the epoxy resin mastic layer.

In a further technical solution, the dimension of the epoxy cement layer extending to the inside of the gap is 3-5 mm.

In a further technical solution, cracks exist on the surface of the reinforced structure, and V-shaped grooves are arranged at the cracks.

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art:

(1) Concrete outer beams can be reinforced without destroying the original insulation layer and decorative layer of the facade of high-rise buildings;

(2) Install profiled steel beams (channel steel) inside the side beams of the original structure, so that they can be closely combined with the concrete beams, so as to achieve the purpose of joint stress and greatly increase the bearing capacity of the original structural beams;

(3) The bearing capacity of the original concrete beam can be greatly improved (not limited by the 40% increase in the specification);

(4) Concrete structures whose strength cannot reach C20 can be reinforced;

(5) Reduce costs. According to past experience, traditional reinforcement methods such as sticking carbon fiber cloth, sticking steel plates, sticking angle steel and enlarging the cross-section all need to be constructed on both sides and under the original beam, which will affect the insulation of the original structure's facade. Layers and decoration layers cause damage. Although these methods can achieve the purpose of strengthening the concrete outer beams, the disadvantages are that the repair costs are large, the waste is huge, and it is not economical. This method does not need to remove the original insulation layer and decorative layer of the facade, which can effectively reduce the cost of the owner. Expenses, so it is easier to be accepted by the owner, and it can also reduce the management cost of the construction unit;

(6) Reduce construction safety risks. Using this construction method does not need to remove the original insulation layer and decorative layer of the building facade, which can reduce the high-altitude edge operations of construction personnel, effectively reducing construction safety risks and damage to people and property around the building risk;

(7) The construction is simple and the construction period is shortened. Compared with the current concrete beam reinforcement method, the method of unilateral reinforcement of the concrete outer beam saves the time of removing and repairing the insulation layer and decorative layer of the original facade, and the construction is simple and can be significantly accelerated. The construction progress has been shortened by more than 50% in the construction period of side beam reinforcement.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the front view of the reinforcement structure of the outer beam concrete structure disclosed by the utility model;

Fig. 2 is a schematic diagram of the section A-A in Fig. 1 .

Among them, 1. Outer beam concrete structure; 11. Reinforced structural surface; 12. Bolt holes; 2. Reinforced steel beams; 3. Bolts; 4. Anchoring colloid layer; 5. Decoration and insulation layer.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Embodiment one

Referring to Fig. 1 and Fig. 2, as shown in the legend therein, a reinforced structure of the concrete structure of the outer edge beam, the outer surface of the concrete structure of the outer edge beam 1 is provided with a decorative insulation layer 5, and the inner surface of the concrete structure of the outer edge beam 1 is set as a reinforced structure surface 11, the above reinforcement structure includes a reinforcement steel beam 2, the reinforcement steel beam 2 is anchored on the reinforcement structure surface 11 by chemical bolts 3, and there is a gap between the reinforcement steel beam 2 and the reinforcement structure surface 11, and an anchor is provided in the gap Colloid layer 4.

The anchor colloid layer 4 is a YZJ-3 perfusion structural colloid layer.

The reinforcement structure surface 11 is provided with bolt holes 12 , and the bolts 3 are chemical bolts placed in the bolt holes 12 .

In order to ensure that the grouting fluid in the later stage can run smoothly, the width of the above-mentioned gap is 2-3mm.

In order to control the gap, an iron wire supported between the reinforced steel beam 3 and the reinforced structural surface 11 may be arranged in the gap.

The construction method of the reinforcement process of the above-mentioned external beam concrete structure is introduced below.

1. Treatment of cracks on the reinforced structural surface

(1) Surface treatment method: For finer cracks on the surface of the reinforced structure, tools such as wire brushes can be used to clean the dust, white ash, scum and loose dirt on the surface of the cracks; Solution, wipe the 20-30 mm along both sides of the crack and keep it dry.

(2) Grooving method: For wider cracks on the reinforced structure surface, a "V"-shaped groove should be chiseled along the crack with a steel drill or a pneumatic pick. The groove width and depth can be determined according to the depth of the crack and the sealing of the crack. . When chiseling the groove, open along the crack first, and then widen to both sides. After chiseling, clean the concrete debris and dust with a wire brush and compressed air.

2. Setting out and inspection

(1) The on-site technician releases the position line of the shaped steel beam and the point line of the through-bolt drilling on the reinforced structure surface according to the requirements of the drawing;

(2) After the on-site re-inspector re-checks that the line is correct, the construction will start.

3. Drill bolt holes on the reinforced structure surface

(1) On-site technicians should make a technical disclosure, and then use an electric hammer to drill holes according to the disclosure content, and the bolt holes should be perpendicular to the reinforcement structure surface;

(2) After the drilling construction is completed, the person in charge of the site checks the diameter of the hole (the diameter of the hole should be 2mm larger than the nominal diameter of the chemical bolt);

(3) Use a blower to blow off the floating dust on the reinforced structure surface and the dust in the hole of the bolt;

(4) Use cotton silk dipped in acetone to wipe the polished reinforced structure surface and the inside of the hole twice to ensure that the reinforced structure surface and the inside of the hole are clean.

4. Reinforced structural surface treatment

(1) Clean the concrete area at the junction of the reinforced steel beams, remove oil and other foreign matter, and use an angle grinder to polish the concrete surface to remove loose structures on the reinforced structural surface to ensure that the reinforced structural surface is solid;

(2) Use a blower to blow off the floating dust on the reinforced structure surface;

(3) Wipe the polished reinforced structure surface with cotton silk dipped in acetone to ensure that the reinforced structure surface is clean.

5. Reinforced steel beam blanking and drilling bolt holes

(1) The technicians and welders shall lower the steel plate according to the requirements of the drawings and the size of the working face on the construction site (in special cases, Party A, the person in charge of design, supervision and general contracting shall make a decision after research). In order to reduce on-site blanking work, it is best to complete the cutting of reinforced steel beams in the processing plant before entering the site;

(2) According to the distribution of bolt holes on the reinforced structure surface, use magnetic drill or bench drill to drill holes at the corresponding positions of the steel plate, and gas cutting and reaming are strictly prohibited;

(3) If it is necessary to weld the section steel to lengthen, it should be completed before the installation of the section steel, and welding after installation is strictly prohibited.

6. Reinforced steel beam derusting

(1) The joint surface of the reinforced steel beam must be derusted and roughened; the reinforced steel beam can be polished and derusted with sandblasting or flat grinding wheels until it appears metallic luster. vertical;

(2) After polishing, wipe it twice with cotton silk dipped in acetone;

(3) Check by the person in charge of the site, and report to the supervisor or general contractor for acceptance after confirming that it is qualified, and then proceed to the next step.

7. Plant chemical bolts

(1) Put the chemical agent part of the chemical bolt into the drilled bolt hole;

(2) Drive the bolt in with a percussion drill, and it will completely solidify after eight hours;

(3) Conservation.

8. Install reinforced steel beams

In order to ensure that the grouting slurry can run smoothly in the later stage, the gap between the steel plate and the concrete should be controlled between 2 and 3 mm, and a short iron wire can be inserted between the back of the steel profile and the concrete surface during installation to control the gap.

9. Tighten the anchor bolts

When installing the reinforced steel beam, first adjust the position of the reinforced steel beam to make it horizontal and vertical, and then tighten the anchor bolts.

10. Glue injection for seam sealing

(1) Sealing: Before sealing the reinforced steel beam, install a grouting nozzle in the middle of the back of the reinforced steel beam. The grouting nozzle is a rubber tube with a diameter of 8 mm and a length of 5 to 8 cm. One end is inserted into the gap between the back of the steel profile and the beam surface for about 1 cm. The edge sealing material of the steel beam is epoxy cement, and the sealing cement is hard to embed 3 to 5mm in the steel plate. The sealing should be dense without small holes, and the surface should be dense and smooth. Leave 5-10cm unsealed on one side of the steel beam top as a grouting vent;

(2) Glue injection structural adhesive deployment: The modified epoxy resin structural adhesive used in this project consists of two components, A and B. When using, pour components A and B into clean containers, press A:B= After weighing at a ratio of 4:1, pour it into a clean container and stir in the same direction until the color is completely uniform. Since the structural adhesive has a strong time limit after deployment, it should be prepared according to the amount of glue injected in each place during construction. , so as to avoid the waste of materials caused by the curing of the structural adhesive before the injection;

(3) Glue injection: Pressure injection is to use a special pressure tank with an air compressor to inject glue. After the sealing glue is dry, the grouting operation can be carried out. The glue injection starts from left to right along the length direction of the steel beam, and the glue injection pressure is controlled at about 0.2Mpa. , stop the pressurization, immediately block the bottom injection nozzle, and then connect the injection pipe to the side steel grouting nozzle to continue injection. The injection pressure is controlled at 0.3Mpa until the top exhaust port overflows the glue at a uniform speed, and then stop adding. Pressure, and the rapid hardening cement is used to block the slurry outlet. During the glue injection process, the steel plate should be lightly tapped with a hand hammer to eliminate the air bubbles in the cavity of the steel plate, which is also an inspection of the compactness. Note that the steel frame should not be hammered, moved or welded after the glue is injected.

11. Normal temperature curing and quality inspection

(1) The basic curing time of the mixed building structure adhesive is about 24 hours, after which it can be stressed;

(2) After curing, lightly tap the steel plate with a hand hammer to judge the density of the glue injection from the sound. If there is no hollow sound, it means that the glue injection is dense. The density of the glue injection should be greater than 90%, otherwise it should be drilled in the hole for refilling , until the requirements are met.

12. Anticorrosion treatment of steel beams

(1) The steel beams for reinforcement installed inside the side beams should be treated with anti-corrosion treatment. For conventional steel anti-corrosion, the following anti-corrosion treatment process (special anti-three coatings) can be used: (1) The exposed part of the steel plate must be removed before painting. Rust, wipe off oil with acetone and keep dry. (2) The anti-rust coating can be coated with special anti-corrosion three-coat. Before applying special anti-corrosion glue, the steel plate must be derusted and have a metallic luster. Use acetone to degrease and carry out strict cleaning before painting, and the post-coating must be done after the pre-coating is cured; 

(2) For the special environment, the anti-corrosion treatment of steel beams should adopt special steel plate anti-corrosion treatment process.

The main materials in the above reinforcement methods are building structural glue, shaped steel beams and bolts.

Epoxy resin adhesives should not be used for structural adhesives and anchoring adhesives. The adhesive requires anti-cold, anti-aging, acid and alkali resistance, no creep at room temperature, good shock resistance, fatigue resistance and durability; currently it is recommended to use YZJ-3 perfusion structural adhesive.

YZJ-3 structural adhesive is composed of A and B components. Component A is a white viscous liquid, and component B is a black viscous liquid. The two components are mixed according to A:B=4:1 (weight) and used. Its performance indicators are shown in the table below:

The technical parameters of the selected YZJ-3 structural adhesive:

It is generally appropriate to use Q235B or 18Mn steel for reinforced steel beams, and the design values of connecting bolts and weld strength should be adopted in accordance with the national standard "Code for Design of Steel Structures". Among them, it is best to use the whole length of the steel beam, and it is best not to weld the length. If it is necessary to weld the section steel to lengthen, it should be completed before the installation of the section steel, and welding after installation is strictly prohibited. The materials must pass the test before they can be put into use, and the use of unqualified products is strictly prohibited.

The above is the description of the embodiments of the present utility model. Through the above description of the disclosed embodiments, those skilled in the art can realize or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. the ruggedized construction of an outer side bar concrete structure, the lateral surface of described outer side bar concrete structure arranges decorative heat preservation layer, it is characterized in that, the medial surface of described outer side bar concrete structure is set to ruggedized construction face, described ruggedized construction comprises reinforcing steel beam, described reinforcing steel beam is anchored on described ruggedized construction face by chemical bolt, and is provided with gap between described reinforcing steel beam and described ruggedized construction face, is provided with anchoring colloid layer in described gap.

2. ruggedized construction according to claim 1, is characterized in that, described anchoring colloid layer is YZJ-3 pouring type structure colloid layer.

3. ruggedized construction according to claim 1, is characterized in that, described ruggedized construction face is provided with bolt hole, and described bolt is the chemical bolt being placed in described bolt hole.

4. ruggedized construction according to claim 1, is characterized in that, the width in described gap is 2 ~ 3mm.

5. ruggedized construction according to claim 4, is characterized in that, is provided with the iron wire be supported between described reinforcing steel beam and described ruggedized construction face in described gap.

6. ruggedized construction according to claim 1, is characterized in that, the edge seal in described gap is provided with epoxide-resin glue mud layer, and described epoxide-resin glue mud layer is installed with adhesive pouring nozzle and steam vent.

7. ruggedized construction according to claim 6, is characterized in that, the inside extending to described gap of described epoxide-resin glue mud layer is of a size of 3 ~ 5mm.

8. ruggedized construction according to claim 1, is characterized in that, described ruggedized construction face exists crack, and described crack place is provided with V-type groove.