Anchor device

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

 

The proposal relates to the construction and repair of bridges and structures, mainly bridges, namely, devices and fixtures for production work associated with concrete construction of structures and facilities.

Known anchoring device, comprising support-anchoring plate containing made with a tapered channel of the housing and rigidly connected with the housing protrusion support surface, placed in a conical recess anchor-anchor plate collet element and cooperating with the bearing surface of the anchor-the anchor plate spiral reinforcement, and the base surface of the protrusion is placed in the plane perpendicular to the longitudinal axis of the conical channel case [1].

However, the known device is too bulky, time-consuming to manufacture and installation, or when its application generates a large stress concentration that leads to a decrease in the bearing capacity of the anchor-the anchor plate.

The technical result, to achieve the aims of this technical solution is the reduction of metal structures and the complexity of its production while reducing stress concentration in the concrete.

This result is achieved due to the fact that the anchoring device, comprising support-anchoring plate, sotiriadou is made with a tapered channel of the housing and rigidly connected with the housing protrusion support surface, placed in a conical recess anchor-anchor plate collet element and cooperating with the bearing surface of the anchor-the anchor plate spiral reinforcement, and the base surface of the protrusion is placed in the plane perpendicular to the longitudinal axis of the tapered channel of the housing, the plane of the support surface of the protrusion is placed at a distance of 0.6-0.7 length of the tapered channel from the plane of its greatest diameter, and between the housing and the supporting surface of the protrusion is made of a radial surface with a radius of 0.2-0.35 length of the tapered channel.

Figure 1 presents the proposed device (anchor device betonirovannaa), figure 2 - place a in figure 3 is mounted device to tension figure 4-5 shows the estimated area of the equivalent stress (N/m2for optimum variant (range 4-6 table 1) anchor device.

The anchoring device includes an anchor-the anchor plate containing made with a tapered channel of the housing 1 and is rigidly connected with the housing tab 2 with the supporting surface 3, is placed in the conical recess 4 anchor-anchor plate collet element 5 and communicating with the bearing surface of the anchor-the anchor plate spiral 6 reinforcement. Bearing surface 3 of the protrusion 2 is posted in a plane located perpendicular to the longitudinal axis 7 of the conical is the anal body at a distance H, equal to 0.6-0.7 length of the tapered channel from the plane of its greatest diameter, and between the housing and the supporting surface of the protrusion is made radial surface of radius R, equal to 0.2-0.35 length of the tapered channel.

Installing the anchoring device is as follows.

Mounted casing 8. On the casing is mounted the mounting tube 9, which is placed in nasheobrazovani 10 and the housing 1 anchor-the anchor plate. In case 1 put on helix 6 reinforcement. Through case 1 stretch reinforcing rope 11. Produce concreting was performed of the housing 1. After concrete 12 required strength remove the casing 8, the mounting tube 9 and nasheobrazovani 10 and produce tension reinforcement rope 11 and the installation of the collet element 5. Then trim the reinforcing rope 11 and install a protective cover 13.

Concreting was performed anchoring device in which the supporting surface 3 of the ledge 2 of the body is placed in a plane located perpendicular to the longitudinal axis 7 of the conical channel housing at a distance H equal to 0.6-0.7 length of the tapered channel from the plane of its greatest diameter, and between the housing and the supporting surface of the protrusion is made radial surface of radius R, equal to 0.2-0.35 length of the tapered channel, allows to increase the rigidity of the support surface and provides Rav is Mirnoe load distribution in concrete 12, avoiding stress concentration therein. It has been tested on the model calculations, as well as in the production environment.

Table 1 shows the results of calculations for different cases of the parameters N, R.

Table 1
No. of rangeNRConclusions the results of the modeling
10.40.05The decrease of the strength properties of the product,

Increasing the concentration of the stress in the concrete - the concrete destruction.
20.50.1The decrease of the strength properties of the product,

The destructive level of concentration of stress in the concrete is still there.
30.550.15The decrease of the strength properties of the product.

Concrete is not destroyed.
40.60.2Retained strength condition.

Concrete is not destroyed.
50.650.27Retained strength condition.

Concrete is not destroyed.
60.70.35Retained strength condition.

Concrete is not destroyed.
70.75 0.4The increase of metal products.
80.80.45The increase of metal products.
90.90.6The increase of metal products.

Concrete is not destroyed.

The range of 4-6 parameters N and R is recognized as optimal from the point of view of metal, the strength of the product and its beneficial effect on the concrete.

Figure 4-5 shows the area of the equivalent stress (N/m2for optimum variant (range 4-6) anchor device.

Table 2 shows the values of the equivalent stress (N/m2for each of the areas.

The area of the equivalent stress (N/m2)Voltage
AndE+07
BE+08
InE+08
GE+08
DE+08
EE+08
WE+08
3E+08
AndE+09

Any other combinations of the parameters N and R is outside the range of 4-6 is not optimal, and in some cases not acceptable.

Thus, this technical R the solution will enable:

- to reduce the metal structure and the complexity of its manufacture:

to reduce stress concentration in the concrete and thereby increase the load bearing capacity of the anchor-the anchor plate.

The source of information

1. U.S. patent No. 4343122, class 52/233 .1, 82

The anchor device, comprising support-anchoring plate containing made with a tapered channel of the housing and rigidly connected with the housing protrusion support surface, placed in a conical recess anchor-anchor plate collet element and cooperating with the bearing surface of the anchor-the anchor plate spiral reinforcement, and the base surface of the protrusion is placed in the plane perpendicular to the longitudinal axis of the tapered channel of the housing and between the housing and the supporting surface of the protrusion made of the radial surface, wherein the plane of the support surface of the protrusion is placed at a distance of 0.6-0.7 length of the tapered channel from the plane of its largest diameter, and a radial surface between housing and the supporting surface of the protrusion is made with a radius of 0.2-0.35 length of the tapered channel.



 

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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

Tendon // 2352737

FIELD: construction.

SUBSTANCE: tendon comprises additional external reinforcing contour in the form of cylindrical rigid steel or nonmetal cartridge that is installed symmetrically relative to prestressed reinforcement and filled with concrete of at least B 15 grade; with concrete prestressing force in element within the limits from 5 N/sq.mm to 40 N/sq.mm and force of side thrust in cartridge from prestressing within the limits from 0 to 300 N\sq.mm. External cartridge may be arranged with rectangular or square section, and prestressed reinforcement - from coal plastic; at that reinforcement made of steel ropes may be installed in flexible nonmetal tubes with lubricant inside.

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5 cl, 2 dwg, 2 ex

FIELD: construction.

SUBSTANCE: joint anchor bolt for consecutive assembly, installed into the place after reinforced concrete frame gets frozen, contains the first anchor bolt, made standing out from the reinforced concrete frame, the second anchor bolt set eccentrically against the axis of the first anchor bolt, connective part for connection of the first and the second anchor bolts, connective part wherein is made with a protruding part, standing out in the direction opposite to the first anchor bolt. As per the other version of the joint anchor bolt, centre of the connective part and axis of the first anchor bolt are coaxial, profile of the said connective part has a polygonal or round surface, and the second anchor bolt is arranged on the circle centered at the axis of the connective part and the first anchor bolt. As per the third version of the joint anchor bolt, connective part and the second anchor bolt are formed in the T-shaped spot, and the first anchor bolt is arranged on the butt side of the connective part. As per the assembly method of the joint anchor bolt for consecutive assembly, which is installed in place after the reinforced concrete frame gets frozen, at first, joint anchor bolt is prepared. Then cylindrical or multisided core is removed from the covering fittings band, preserving their position, when the fitting meets with the drilled hole for the anchor, whereat said core corresponds to the shape of the specified connective part and surrounds drilled hole. Thereafter holes for the second anchor bolt are drilled and joint anchor bolt is simultaneously secured.

EFFECT: reduced moment of deflection directly affecting the connective part due to the load over the said first anchor bolt.

18 cl, 19 dwg

FIELD: construction industry.

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EFFECT: providing the possibility of controlling both breakage of rope inside pre-stressed building structure, which is characterised with rope end released from channel former to free volume space under the cap, which thus decreases volume under cap, and possibility of controlling loosened rope at sliding in collet, which is characterised by sinking the rope end in channel former and thus increasing volume space under cap.

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FIELD: mechanics.

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