Reinforced material for concrete building repairing ,repairing and reinforcing technology for concrete building

Abstract

A stiffener for repair of a concrete structure and a repairing and reinforcing method of the concrete structure, masking use of the stiffener are provided to raise constructability, minimize breakage of the structure, and easily and exactly secure stressing force set through the fastening of bolts and nuts and through measurement of torque.A stiffener for repair of a concrete structure comprises a pair of angle-type supports(10) having horizontal plate parts and vertical plate parts; plural anchor bolts(20) fastened to anchor-through holes of the horizontal plate parts and fixed to the concrete structure to be repaired; plural linear tendons(30) arranged in parallel; and plural nuts(40) disposed outside the vertical plate parts and screwed to male screw parts(31) disposed to the ends of the linear tendons, to give stressing force by pulling the linear tendons to both sides. The anchor bolts fix the angle-type supports to the surface of the concrete structure. The male screw parts are fitted into screw-through holes of the angle-type supports.

Description

technical field [0001] The present invention relates to repairing and reinforcing technology for aging or weak concrete buildings, especially by measuring the tightening and torque (TORQUE) of the screws installed at both ends of the tension material to ensure correct tension and easy installation Inventions related to repairing and strengthening materials and techniques for concrete buildings. Background technique [0002] As we all know, various concrete buildings used for civil engineering are subject to climate change, seawater, groundwater, rainwater and other polluted water and harmful substances, and the quality of concrete will gradually deteriorate and aging will also occur. [0003] Therefore, concrete buildings should be periodically inspected for safety. If the inspection results fail to meet the required strength or have abnormal peeling, peeling, cracking, etc., repair and reinforcement work should be carried out to increase the strength and load capacity. [...

AI Technical Summary

Problems solved by technology

[0007] However, the above-mentioned technology of reinforcing aging concrete buildings with steel wire mesh judges the quality based on the tension state of the steel wire mesh attached to the concrete building, and the reinforcement effect cannot be guaranteed due to the following reasons:

[0008] 1. A roll of steel wire mesh is generally 33 wires tensioned and fixed on site. It cannot be guaranteed that each steel wire is in a tensioned state, and there will be a defect of pleating, which cannot reach the required tension, thereby reducing the reinforcement effect.

[0009] 2. When constructing on the rough surface of damaged concrete, the steel wire mesh will be pleated, reducing the reinforcement effect

[0010] 3. The steel wire mesh is produced with a length of about 30M. If it is cut off according to the construction length on site, it will be connected in order to reduce consumption. In this way, the cut-off part will become fragile and the tension will also become weak.

[0011] 4. For the part pressed by the tensioner during construction, it is impossible to tension the 1-2M at both ends of the steel mesh. When the tensioner is released, the tension will inevitably be damaged

[0017] 1. Although the tensile strength of the fiber material is very strong, it is easy to be damaged when subjected to an instantaneous impact, and cannot exert the anti-seismic effect;

[0018] 2. The fire resistance of aramid fiber (ARAMID FIBER) is low. When a fire breaks out, the fiber is in danger of being burned. Therefore, mortar heat insulation and surface fire-resistant treatment are required during construction, which will increase the cost;

[0019] 3. The end of the fiber material is inserted into the stainless steel iron bracket and fixed with nails or connecting wires, there is a danger of falling out or being damaged from the fixed part;

[0020] 4. When the construction surface is irregular, if the fiber material is not set straight, the reinforcement effect will be reduced;

[0021] 5. It is very difficult to transport and store fiber rolls with a long diameter or more than 15M. When they are bent to a certain extent, they cannot be used, so there will be problems such as excessive connection parts and tension cannot be transmitted, slipping, etc.;

[0022] 6. The initiation strength between the fiber roll and the mortar is uncertain, and the cross-section of the fiber roll is wide, which cannot form a strong bond with the old concrete

When it loses durability and sags, simply use adhesion to prevent sagging; the structure of the connection part is inaccurate; precise flatness of the contact surface is required, which increases the cost and prolongs the construction time

[0026] In particular, No. 10-1997-0058912 uses an organic material epoxy resin board that has different physical properties from reinforced concrete. Over time, the interface will separate and fall off, the reinforcement effect will decrease, and the organic material will be burned in the event of a fire.

[0027] No. 10-2001-0054105 uses carbon beams to increase the load capacity of buildings, and No. 10-2001-0107897 uses steel wire tension device to strengthen the bottom plate. And the bottom space is reduced, and the long-term exposure of the building will cause problems such as damage and fracture

[0033] The reinforcement material has a linear structure, and bolts must be installed for each reinforcement material, which not only wastes time, but also requires many holes to be drilled to install the bolts, which will damage the building

[0034] In particular, the rotating buckle that gives tension to the shaped wire and the spring wire will stick to the surface of the concrete, and it is difficult to measure the tension of the shaped wire and the spring wire, so it is difficult to ensure proper tension when turning the rotating buckle , disturbed by building surfaces, reducing efficiency

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