SU1323660A2 - Arrangement for constructing prestrained ferroconcrete foundation - Google Patents

Abstract

The invention relates to the construction, in particular, to devices for the manufacture of reinforced concrete foundations. The purpose of the invention is to increase productivity. The device for erecting a pre-stressed reinforced concrete foundation consists of core 1, a base plate with a load mechanism located around the core of reinforcement bars 4 with a vibratory pile driver, tip 5 and a fixture for fixing reinforcement bars 4 in the form of movable clamps 9. The latter have a head 10 with a groove for a rebar and a curved shank 12 with a stop 13 at the end. The tip 5 is provided with a shank 6 with a limiting stop 7. Under the shank 6 of the tip 5 and curved shanks 12 clamps 9 in the core 1, slots 8 and 1 1 are provided, respectively. The tip 5 is made with sockets 14 under the heads 10 of the retainers 9 and recesses 15 with longitudinal grooves for temporarily securing the ends of the reinforcement bars 4. Using the device, the rods of the prestressed reinforcement are pushed into the concrete mix of the well and the core is then removed. .1em it from the upper ends of the reinforcement. 4 il. S cl 00 to from 05 O5 O GO .2

Description

: 1; () D) RS || -1111g (jTiiocMTfH for co-ordination, ;; i just h | rpGk tvam for change: .t.gmo: i) bst (I11101CH) of the foundation, and is tigelny by August . St. No. 1193235.

The purpose of the invention is to find a way out.

On fng. 1 shows the proposed section; in fig. 2 - node 1 tip and podnri

 concrete mix);

extraction position

4 - the same, from construction,

in fig. 1, position

sliding clips

reinforcement rods E

in fig. 3 - the same

Py fixers in front

tip; in fig.

tip attraction after the core

with clamps.

The device for erecting a pre-stressed reinforced concrete foundation consists of a core 1, a support plate 2 installed above it with a tension mechanism 3, located around the core 1 of reinforcement bars 4 with a vibratory pile driver. At the lower end of the core is mounted movably in the axial direction of the cone-shaped tip 5, containing an axial shank 6 with a restrictive stop 7, which is movably included in the axial slot 8, made in the core I.

In addition, the device contains a device for fixing reinforcement rods in the form of uniformly spaced but core diameter 1 movable retainers 9, each of which consists of a head 10 protruding beyond the surface of core 1 with a groove for reinforcement rods and curved tail 1, which is movably installed in the corresponding slot 11 of core 1 12 with limit stop 13, at the end. Moreover, at the end of the tip 5, sockets 14 are made under the heads 10 of the retainers 9, and on the side surface there are depressions 15 with longitudinal slots for temporary fastening of the ends of the reinforcement bars 4.

The outer surface of the core 1 may be covered with a special composition that prevents its adhesion with the foundation foundation being constructed.

The operation of the device for the construction of reinforced concrete prestressed basement is carried out as follows.

Around the core 1, the surface of which is pre-coated with the composition,

five

0

five

0

five

0

five

preserving it from stssgmeni with concrete, they assemble the reinforcement bars 4. At the same time, the lower part of the stems) and 1 4 tips 5 and the slots of the heads 10 (|) of the pincers 9 secured the ends in the recesses 15 of the tips, for example nuts. The upper ends of the reinforcement bars 4 are fastened using the tension mechanism 3 on the support plate 2 and pull them up to a given value.

Then, the core with prestressed reinforcement is lowered with the help of a vibrator in a concrete mix, which fills a pre-formed well with a diameter of several depths, somewhat smaller than the diameter of the future pile, at a full depth. After the concrete is loaded with a concrete zadappoy, the core I, the reinforcement 4, which has been previously released from the upper ends of the rods, vibro-extracts the pre-stressed pile in the ground (ruj / iyK).

At the same time, during the patch period, the vibration of the core 1 of the clamps 9 and the cone-shaped lug 5 remain in place, with the subsequent lifting of the core, first the curved shanks 12 of the clamps 9 turn the heads 1P into the cavity formed between the core and the packer, and then the sun begins to be removed. ched behind the core 1 of its cone-shaped tip 6, whose upper surface along the perimeter has a rounded profile 16 to reduce friction against the walls of the cavity of the finished pile.

If necessary, the circulation of the coolant can be arranged inside the core 1, which will lead to the intensification of the pile concrete hardening and, as a result, to a significant acceleration of the production work.

Claims (1)

Formula of invention The device for the reinforcement of reinforced concrete prestressed foundation according to ed. St. L 1 193235, characterized in that, for the purpose of productivity, the core C1 is abgen mounted movably in the axial direction with a ferrule made from the sockets at the end under the head retainers and grooves with grooves. 1p) 1 grooves on the side surface to temporarily secure the ends of the rod to the armature five (og.z Srig.