A method of manufacturing a reinforced concrete contact network
(57) Abstract:Use: in the production of concrete structures, mainly in the production of reinforced concrete, the contact network. The inventive method of manufacturing a reinforced concrete contact network includes laying in nests of the thrust units of rods main longitudinal reinforcement, pre-tension to one-half the required voltage, extra longitudinal Assembly and spiral reinforcement, the final tension of the main longitudinal reinforcement to a predetermined value of voltage, concreting and removal of the forms, the final tension of the main longitudinal reinforcement produce, together with the additional length of the rods which exceeds the length of the rods of the main longitudinal reinforcement in the relaxed condition on the value (from 0.88 to 0.95) from their full extension. 4 Il. The invention relates to the production of reinforced concrete structures, mainly for the production of reinforced concrete, the contact network and can be used in the manufacture of power transmission poles, piles of shells, columns, and other extended structures with mixed reinforcement.Famous when sung, concreting and removal of the forms 
There is also known a method of manufacturing reinforced concrete, the contact network, including the installation of a pre-tensioned rods of high strength wire  concreting and removal.There is also known a method of manufacturing prestressed concrete products, including the installation of a pre-tensioned and UN-tensioned reinforcement of the steel rod, concreting and removal of the forms 
Of the known methods the closest in technical essence is a method of manufacturing prestressed products, including pre-tensed and relaxed valves 
In this way UN-tensioned reinforcement is installed post-tensioning prestressed rods and has no voltage, which requires a lot of work. In addition, the absence of voltage in the non-tensioned reinforcement leads to the fact that after hardening of the concrete, due to its shrinkage and creep additional voltage, resulting in reduction of fracture of structures.The task of the invention is to reduce labor costs, increase fracture toughness and durability of structural support contact network.This zaderej, and their length exceeds the length of pre-tensioned rods in a relaxed condition on the value (from 0.88 to 0.95) full lengthening of stressed rods.The proposed method for the manufacture of reinforced concrete, the contact network with these restrictive signs, allows to reduce labor costs in manufacturing through installation and fixing of UN-tensioned rods in special nests, but due to a small tension on the amount of 0.05 to 0.12 from full extension tense valve to avoid the additional concrete stresses due to shrinkage and creep, and thus improve the crack resistance and durability of structures.In the known methods of manufacturing pre-stressed concrete products mounting and fixing loose fittings requires more labor, and the absence of small tension of this valve causes the concrete to additional stresses due to shrinkage and creep of concrete and reduction of fracture of structures.The novelty of the proposed method of manufacturing reinforced concrete, the contact network is to reduce labor costs in its manufacture, increase the fracture toughness and durability of structures.
the manufacture of the frame, as well as to increase their physical structures.In the known method the analogue of  for installation, fixing of loose fittings require much work, and no additional stress unstressed reinforcement leads to a decrease of the fracture toughness of the products and durability.The novelty of the proposed method, characterized by its distinctive features is to reduce labor costs in the manufacture of the reinforcement cage and improving the crack resistance of structures.These properties have no method of manufacture of concrete products, therefore, the proposed solution has significant differences.In Fig. 1 shows the experimental curve of the ratio of movements, loose fittings and hard valve and service life of reinforced concrete. The latter is the integral index of the most defining quality of supports. The highest values of life supports are achieved when the ratio of elongation relaxed and tense valves are within 0.05 to 0.12. The ratio obtained for the supports, in which the pre-tense valves the data to ensure the greatest longevity of the support in the proposed method, manufacturing support contact network adopted the ratio between the elongation of an unstressed reinforcement and extension of hard reinforcement, 0.05 to 0.12, or exceeding the relaxed length of the rods against the tense is (0,88 0,95) from the desired lengthening of hard reinforcement.In Fig. 2 shows a General view of the location of reinforcing bars; Fig. 3 reinforcement cage after the tension of the valve; Fig. 4 - section reinforcing cage along a-A.The figures shown: 1 rod pre-tensioned reinforcement; 2 additional rod reinforcement; 3 end anchor; 4, left thrust unit of the tensioning mechanism; 5 right thrust unit of the tensioning mechanism; 6 mounting ring; 7 spiral.The proposed method is as follows.Example 1. In Tolmachevo the ZBK make contact network with mixed reinforcement capacity of 80 kNm. Tense armature stronomical of high-strength wire with a diameter of 5 mm Control voltage armature 810 MPa. Tension rods of the valves of the class A-III with a diameter of 12 mm leg Length 13600 mmIn accordance with the project and subject to the anchors is harvested stronomical of 48 wires length 13800 mm Pranie lengthening loose rods to lengthen tense wires, equal to 0.1, we get the required length loose rods, equal to (lNN550,1=6 mm 5,5);
l 13655 6,0 13649 mmOr taking into account the length of end anchors the relaxed length of the rods will be:
l 13649 + 240 13729 mmAfter harvesting valve stronomical 1 is installed on the hard nodes 3 and 4 tensioning mechanisms and then stretched to 50% of the required effort, i.e., until the voltage in the wires is equal to 400 MPa. Then set loose rods 2, the mounting ring 5 and revive helix 6. After this pre-tensioned reinforcement to reach the controlled voltage 810 MPa and at the same time UN-tensioned reinforcement gets a little tension. Then under the frame is proforma, laying concrete, curbs second proforma and preliminary voltage is passed to the form. After centrifugation, steaming and wrecking bearing ready for testing.Tests conducted at the crack showed an increase in the moment of crack formation by 10% against the moment of crack formation at the poles, which have loose fittings had no initial small voltage.Example 2. In the same factory made contact network with mixed reinforcement begins 820 MPa, loose terminals of the armature of the class A-III with a diameter of 12 mm leg Length 10800 mmIn accordance with the project with consideration of anchors length strompaket will be 11000 mm, Then the elongation of strompaket within the envelope of support will be
< / BR>Taking the ratio of the elongated relaxed and tense reinforcement equal to 0.1 will provide the necessary length of the non-tensioned rods (lNN440,1 4,4 5 mm);
l 10800 + 44 5 10839 mmOr taking into account the length of end anchors
l 10839 + 240 10919 mmFurther stronomical set on persistent nodes 3, 4 tensioning mechanisms, pull pack on 50% of the required tension. Then set loose rods 2, mount the mounting ring 5 and revive helix 6. Then tense the muscles of the valve to reach the desired controlled voltage, at the same time UN-tensioned reinforcement gets a little tension. Then perform operations on the installation of formwork, concreting, centrifugation, removal of the forms.Tested for crack resistance made support showed an increase of fracture toughness of 8% against the supports with non-stressed with rods.Sources of information:
1 Kudryavtsev A. A. Carrier hundred the sites of buildings and structures. Series 3.501.1-138 Bearing reinforced concrete cantilever contact network of electrified Railways. Release 1/87. Products manufacturing plant. The working drawings. Giperprostranstvo.3. Auth. St. USSR N 1323685. A method of manufacturing pre-stressed concrete products. A method of manufacturing a reinforced concrete contact network, including laying in nests of the thrust units of rods main longitudinal reinforcement, pre-tension to one-half the required voltage, extra longitudinal Assembly and spiral reinforcement, the final tension of the main longitudinal reinforcement to a predetermined value of voltage, concreting and removal of the forms, characterized in that the final tension of the main longitudinal reinforcement produce, together with the additional length of the rods which exceeds the length of the rods of the main longitudinal reinforcement in the relaxed condition on the value 0,88 0,95 from their full extension.
FIELD: apparatuses for fastening reinforcing parts, for example mutually crossed reinforcing rods.
SUBSTANCE: drum around which wire for fastening reinforcing rods is wound is mounted in shaft arranged in housing. Annular recess is formed along edge of opening of housing. Diameter of said recess exceeds that of lower part of housing. At side of opening of housing drum has flange arranged in said annular recess. On inner peripheral surface of opening of drum boss there is dent for preventing drum separation from its mounting shaft. On outer edge surface of shaft there is mounting recess for engaging dent.
EFFECT: improved design preventing wire penetration into gap between housing and drum, enhanced operational reliability of drum and machine for binding reinforcing rods.
4 cl, 27 dwg
FIELD: preparing, conveying, or working-up building materials or building elements in situ, mounting and prestressing of reinforcing inserts.
SUBSTANCE: reinforcing bar binder feeds wire while rotating a wire reel installed in chamber and binds reinforcing bars. The chamber comprises the first detecting means to detect wire reel rotation and the second detecting means to detect number of second wire reel parts to be detected during reel rotation by the first detecting means. Binder body is provided with control means to control the amount of fed wire or wire torque depending on the number of second parts detected by the second detecting means.
EFFECT: increased structural simplicity and provision of automatic regulation of fed wire amount and torque thereof.
12 cl, 19 dwg
FIELD: equipment designed for fastening reinforcement by means of wire, for example for fastening mutually crossing reinforcing rods, possibly in building.
SUBSTANCE: machine includes housing; rotating drum carrying wire for fastening reinforcing rods; unit for controlling drum rotation; one or more detected objects. Detected object may be placed on lateral surface of drum. At controlling rotation of drum, said object is detected through opening of lid providing light reflection from light irradiator. Light reflected from detected object and light reflected from lid is received for determining difference between their intensity values.
EFFECT: enhanced operational reliability of machine, elimination of errors at monitoring wire consumption.
12 cl, 40 dwg
SUBSTANCE: armature guy is carried out at first in angular cells on construction contour, then in central cell, after in cells adjoining to central cell on all central axis across construction, then on cells of layer adjoining to central layer of cells in direction to external contour and at the end cells located on construction perimeter. In angular cells an armature guy is made in spans between a corner pillar and the first from it in two axes on construction location. In cells adjoining to central cell, on all central axis a guy is made on longitudinal spans on construction location, on cells of a layer adjoining to central layer of cells, guy is made in two mutually perpendicular spans, beginning from central axes concerning central cell, thus guy on different parts is carried out by different devices.
EFFECT: increase of load-carrying capacity of construction floorings and reliability of devices for armature guy.
7 cl, 8 dwg, 1 ex
SUBSTANCE: invention is attributed to construction engineering and can be used for binding of reinforcement cages of concrete products. Reinforcement hook contains shaft on one end of which handle is installed which can be rotated, and the second end of the shaft is tapered and bended as hook. Lever is hinged on the handle. The lever is capable to change position relative to handle. Two more levers are installed on shaft of reinforcement hook which levers can travel along hook and relative to each other and they are interconnected by elastic element. As a result due to simple fastening elements using, binding with wire pieces without loop is provided and production is cheapened.
EFFECT: cheapening of construction.
FIELD: construction industry.
SUBSTANCE: mechanism is intended for attaching extended elements to each other, and especially such elements as reinforced bars and electric cables by means of at least one wire. Mechanism consists of two jaws (6, 7) moved down on the elements to be connected (8). There are provisions made for means (20) of supplying wire (12) along guide surface (10) of the first jaw (6) to guide surface of (11) the second jaw (7), thus forming a wire loop which envelopes the above elements on three sides, and in this case ends of this loop can be twisted on the fourth side of elements (8). Twisting means consist of device (14) rotating relative to jaws (6, 7) and guiding the wire (12) at its supply to jaw and removal from jaw.
EFFECT: providing possibility of wire straightening with overcoming the resistance by the value required for twisting the wire loop ends.
25 cl,13 dwg
FIELD: engines and pumps.
SUBSTANCE: reinforcing bar wire-tying machine incorporates wire drum with data detection and wire identification device designed to detect and identify wire on the drum flange side surface and allows wire twist force or feed amount control proceeding from the wire identification data detected in starting wire-tying with the help of the rotation detection lever. The drum comprises cylindrical bush with a pair of flanges on its sides and has an extending section on the outer side surface with a reflecting symbol on the bush outer side surface. The type of wire coiled around the said drum is determined from the number of disclosed reflecting symbols when the detection signal is input from the aforesaid lever. The wire data is detected at the drum high-rotation wire-tying speed, not in coiling the wire on the drum.
EFFECT: reliable wire-type data detection.
21 cl, 9 dwg
SUBSTANCE: method includes use of a piece of the wire as fastening element which part is bent with formation of the lug for grasp with reinforcement cage, fastening element supply under flooring of reinforcing bars, lug grasp with reinforcement cage, throwing of fastening element through it from condition of an arrangement of flooring of reinforcing bars in wire loop and a tightening of a loop several turns of the reinforcement cage at deduction of a tail of the fastening element. For this purpose use the manual delivery unit; the container with a holder for placing of the fastening elements is established in its case, submitting gear and a clip. The manual delivery unit is brought to flooring of reinforcing bars, the fastening element is taken from the container, and the fastening element supply under flooring of reinforcing bars is carried out by its telescopings by means of the delivery unit. Holding of a tail of the fastening element at tightening of a loop by turns of the reinforcement cage is performed by means of a clip of the mentioned device which sizes allow to carry out joining in close places.
EFFECT: labour productivity increases.
FIELD: construction industry.
SUBSTANCE: reinforcing bars of reinforced concrete structures are set into place and attached manually with a reinforcing hook using fasteners. A piece of wire is used as fastener, and some part thereof is bent into halves so that a closed or open loop with a tail piece can be formed of one or two wire strands. Reinforcing hook is equipped with a lock that allows maintaining the fastener's tail piece.
EFFECT: invention allows improving labour capacity when attaching bars by means of reinforcing hook.
FIELD: mechanical engineering.
SUBSTANCE: invention refers to mechanical engineering and can be used in machine for reinforcement material binding with wire. The reel is fitted with reel rotation control sensor. The reel has two flanges, inner cylinder area where reel mounting shaft is inserted, and outer cylinder area around which wire is spooled. Between inner and outer cylinder area there are multiple objects with quantitatively differing physical characteristics which objects are detected by reel rotation control sensor.
EFFECT: reliable wire consumption detection is provided.
4 cl, 40 dwg