The method of tensioning the reinforcing element with the anchor sleeve

 

(57) Abstract:

Usage: for tension reinforcement in concrete in construction conditions and stops forms in the factory. The inventive reinforcing element with a passive anchor at one end is pulled by a hydraulic cylinder to design value, then the sleeve is fixed by stops her butt in the matrix of the plug rod of the hydraulic cylinder and carry out the crimping sleeve in the direction of application of the tension force of the reinforcing member, the pressing matrix node is moved relative to the sleeve and the reinforcing element. 1 Il.

The invention relates to the construction and can be used tense constructions with tension reinforcement in concrete in construction conditions and stops forms on the concrete, and for similar operations in other sectors of the economy.

A known method of manufacture of anchors for flexible elements, mainly the ropes (bundles) prestressing reinforcement through the crimp sleeves, including a preliminary tension of the flexible element and the subsequent pressure test on it anchor sleeve [1]

Closest to the invention to the technical nature of M as pressovannoe sleeves, including by putting in rebar sleeve, installation of hydraulic jacks, the tension reinforcement and the subsequent crimping sleeve. The crimp sleeve is as follows. After the tension of the reinforcing element to the design level first do partial crimping sleeves compressive force at the end of the plot, not exceeding 0.1 0.2 length sleeve, to lock it in the washer, then the compression force is removed and transmit the force to the tension reinforcement to the liner by means of a compressive longitudinal force at the end of the sleeve and the rod of the hydraulic cylinder, and then produce the final crimp sleeve over its entire length.

The disadvantage of this method is the danger of rupture of the reinforcing element at the time of crimping sleeves, because the moulding is produced in the direction opposite to the direction of tension of the reinforcing element. When the known methods after the tension of the valve stem with the punch and the sleeve begins to move, prescovia sleeve in a fixed matrix to stop her butt in the armature disc. Thus, the sleeve moves with the punch, carrying the valve and increasing the force of its tension, as after the beginning of the crimp sleeve on the valve base is to become the element and avoid the risk of breakage of the reinforcing element during the moulding of the anchor sleeve.

The task is solved in such a way that in the way of tension reinforcement element with anchor sleeve including putting on the valve element sleeve, the tension of the reinforcing element, the fixing and pressure test the cartridge by its passage through polerowanie hole matrix and pressing device and the transmission of tension reinforcement on sleeve, after the tension of the reinforcing element to the design size of the sleeve is fixed in the project position by stop her butt in a matrix and perform the test according to the entire length of the sleeve in the direction of application of the tension force of the reinforcing element.

The proposed method differs from the known fact that the sleeve is fixed in the project position by stop her butt in the matrix and the test carried out along the entire length of the sleeve in the direction of application of the tension force of the reinforcing element. This allows immobilisation of the sleeve relative to the rope during crimping, since the moulding is carried out in the direction of application of the tension force by the movement of the matrix relative to the anchor sleeve, the possibility of increasing stress in prestressed reinforcement element and its breakage.

/P> The device consists of a hydraulic cylinder 1 with a through hole for reinforcing element, resistant table 2, the pressing of the node that contains the cylinder housing 3, a transmission 4 and rear 5 lids with seals, the piston 6 and the piston rod 7 with a fixed punch 8. On the housing 3 cylinder placed fittings 9 and 10 for high pressure hoses. To the front cover 4 pressing node attached removable die-holder 11 with the matrix 12 for crimping the anchor sleeve 13, which rests on the armature disc 14, and the column with the hole 15. The device in the center has a through hole 16 for reinforcing element 17. The tension on the reinforcing element 17 during crimping the anchor sleeve 13 matrix 12 hold the collet 18.

The method is as follows. The reinforcing element 17 with one pressovanny in advance "passive" anchor miss its free end (without anchor) through the armature disc closed and through corresponding holes in all the columns for the entire length (width) of the building along one of the axes of the building so that the other end of the armature is released from the hole at column 15 on the other side of the building. Then the valve is put on the die-holder 11 with MatrixOne node, passing the valve 17 through the Central longitudinal opening 16 of the device. It is necessary to draw attention to the fact that the pressing rod 7 site is located at the far right (flush) position. Then on the device set resistant table 2. To give thrust to the table greater rigidity of his rack at the bottom (in columns) additional bonded zone, one side of which is hinged on an axis and secured. It is necessary for passage through the lower zone of high pressure hoses that connect pressing the site with a pumping station through the fitting 9 and 10, to high-pressure hoses not be removed each time after another tension cable fittings and crimp active anchor. After installing resistant table 2 on the free end of the armature 17, extending from a base plate of a table, put on gidrotartrat 1 collet 18, inserted in gidrotartrat to hold the tension force during pressing.

The hydraulic cylinder 1 produce tension reinforcement to the efforts close to the project, which lasts collet 18, through persistent table 2. After that begin operation crimp "active" anchor, to which the oil pressure from the N. is it 6 moves forward, presses the plunger 8 of the sleeve 13 to the matrix 12 and stops the locking sleeve 13 in this position. In this case pressing of node 3 with the die-holder 11 and the plate 12 were in a stationary position. Then pump station switches and pressure is blown into gidrotamir through the nozzle 9, causing the body pressing of node 3 with the matrix 12 and the die-holder 11 to move in the opposite direction with a rigid rod, while prescovia sleeve 13, is the process of crimping by reducing its diameter and flowing of the metal liner in the basin of the cable fittings. This movement continues until the full release of the anchor sleeve 13 from the matrix 12 on the outside of the device. After completion of the crimping process by switching the pumping station, the pressing rod 7 of the node is returned to its original position and the pumping station is switched off. Then checked the tension on the cable at the valve and at its lack generate lift valve, and fix opressovannyh sleeve on the column with the required number of forklift washers. After this, remove the oil pressure in the hydraulic cylinder of the tension 1 and the device is removed from the valve in the reverse order: first remove gidrotartrat tension 1, will help ensure the accuracy of the tension reinforcement and eliminate the risk of rupture during its tension when the compression sleeve, since the reinforcing member is not experiencing more tension during the crimp process, as it remains fixed relative to the sleeve, the metal which flows freely in the cavity of the valve.

The method of tensioning the reinforcing element with the anchor sleeve including putting on the valve element sleeve, the tension of the reinforcing element, the fixing and pressure test the cartridge by its passage through polerowanie hole matrix pressing device in the direction of application of the tension force of the reinforcing element and the transfer tension of the reinforcing element on the sleeve, characterized in that after the tension of the reinforcing element to the design size of the liner is fixed in the project position by stop her butt in the matrix, and molding in the direction of application of the tension reinforcing element is carried out along the entire length of the sleeve.

 

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Anchor device // 2334065

FIELD: construction.

SUBSTANCE: proposal is related to construction and repair of artificial structures, mostly bridges, namely to devices and accessories for production of works related to concreting of construction structures and facilities. Anchor device includes support-anchor plate that contains casing arranged with conical channel and protrusion with support surface rigidly fixed to the casing, collet element installed in conical bore of support-anchor plate and reinforcement spiral that interacts with support surface of support-anchor plate. Support surface of protrusion is installed in the plane that is located perpendicularly to longitudinal axis of casing conical channel at the distance H equal to 0.6-0.7 of conical channel length from the plane of its largest diameter, at that between casing and support surface of protrusion there is radial surface arranged with radius R equal to 0.2 - 0.35 of conical channel length.

EFFECT: reduction of structure material intensity and labour intensity of its manufacture with simultaneous reduction of stress concentration in concrete.

5 dwg, 2 tbl

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