37results about How to "Reinforcement is simple" patented technology

The invention provides a stretchable steel formwork. The stretchable steel formwork is particularly suitable for construction of a construction concrete formwork with the circular variable cross section. The stretchable steel formwork is roughly rectangular, and comprises a face plate and stiffening ribs, and the stiffening ribs are distributed on the outer side of the face plate in a crisscross mode to enhance the rigidity of the face plate. The face plate is rectangular, a stretchable adjusting edge a certain distance away from the face plate is arranged on one long edge of the face plate, and long-strip holes parallel to the short edges of the face plate are formed in the stretchable adjusting edge. A socket key is arranged on one of the two short edges of the face plate, and a socket groove is formed in the other short edge of the face plate. When the stretchable steel formworks are subjected to annular lap joint, the adjacent stretchable steel formworks are fixed through split bolts, and the stretchable adjusting edges are located on the inner sides; as the long-strip holes are formed, the lap joint length of the two stretchable steel formworks is calculated and determined according to the change rate of the cross section of a circular building, and the appearance quality of concrete is improved; meanwhile, the stretchable steel formwork is high in standardization and suitable for industrial production, the construction progress can be improved, and therefore the construction cost can be reduced.

The invention discloses a construction method of precisely positioning minor distance free face drilling, comprising the following steps of: selecting steel plate or profiled bar as the materials for making die according to the dimension of the aperture of a drill hole, drilling holes on the steel plate or profiled bar according to the aperture; pulling out and marking the center lines of each hole with a measuring apparatus according to requirements of design drawing; precisely positioning a hole die according to the position of the pulled center line of each hole on site so as to ensure thecenterline of the positioned hole on the die to be aligned with the centerline of the hole on site, then fixing the holes with steel support feet welded on the hole die and using expansion bolts to fix the holes on a base plane so as to secure the die; mounting a core drill, placing a bit at a corresponding center of hole and drilling, a set of fixture is arranged on the drill pipe to avoid drillpipe swaying during drilling and pressing lightly and rotating slowly when drilling so as to reduce the vibration of the drill. The construction method solves the problem of low drilling rate of holes on free face with minor distance and poor precision of holes drilled and is an economical and practical drilling construction method.

PROBLEM TO BE SOLVED: To provide an expansion joint for concrete structure which can effectively tighten an expansion part of a flexible material to concrete structure and has high sealability.SOLUTION: An expansion joint 1 comprises: an expansion part 5 of a flexible material which is arranged over a joint part 3 of concrete structure 2, and has press parts 4 on both sides; a contact part 6 with a U-shaped cross section which is covered to the press parts 4 over a longitudinal direction; and a plurality of fixation units 10 for being pressed and fixed to the concrete structure 2 at an interval in the longitudinal direction of the contact part 6, in which the fixation unit 10 has: a short leg 11b folded downward located on the side of the joint part 3; and a long leg 11d folded downward located on the opposite side of the joint part 3, the long leg 11d has: a pressure part 11 which contacts the concrete structure 2 and is covered to the contact part 6; and an anchor bolt nut 14 for pressing the press part 4 to the concrete structure 2 via the pressure part 11, and the contact part 6 is located on the side of the joint part 3 to the anchor bolt nut 14.

A preparation method for a TRC formwork reinforced concrete column comprises the following steps that a fiber woven mesh with high tensile resist strength and good decay resistance is adopted, and the fiber woven mesh is dipped into glue or strengthened through a steel wire mesh liner; an inner mould is mounted, shear resistant hooks are mounted in drill holes of the inner mould in an inserting mode, and the fiber woven mesh is fixed to the outer side of the inner mould; an outer mould is built on the outer side of the fiber woven mesh, prepared high-performance concrete is slowly poured into space formed by the inner mould, the fiber woven mesh and the outer mould, and manufacturing of a TRC formwork is finished; and after a TRC formwork layer reaches the set strength, formwork disassembling is carried out, the concrete is poured into the TRC formwork, and preparing of the TRC formwork reinforced concrete column is finished. Compared with the prior art, time and labor are saved, the cost is reduced, and the construction efficiency is improved; the bearing capacity and ductility of the reinforced concrete column are improved, and the durability of components in severe environments such as a cold environment and an alkalinity environment is improved; and strengthening of a building is more efficient, simpler, cheaper and more environmentally friendly.

The invention belongs to the technical field of concrete reinforcement and relates to a method for reinforcing concrete with a fibrage net and a cement-based material. The method is to pour the fibrage net the total thickness of which is between 10 and 20 millimeters and fine concrete on the outer surface of a structure, and is characterized by comprising the following steps that: drilling holes on the surface of the structure in the process of construction; using the short end foot of a U-shaped shear resistant pin of which the two end feet have different lengths to hook the fibrage net, andinserting the long end foot thereof into the hole after a building structural adhesive is smeared on the long end foot; spraying the fine concrete after the adhesive is solidified; using the short end foot of a U-shaped hook of which the two end feet have different lengths to hook a second layer fibrage net, and inserting the long end foot thereof to the fine concrete; and spraying the fine concrete. The method can avoid the generation of interface micro cracks at high stress, effectively prevent interface peeling damages, reinforces building structures reliably, simply, efficiently and environmental protection, and is applicable to reinforcing and repairing various types of structures.