SU131722A1 - Mobile formwork - Google Patents

Description

Movable bottom-hole suspended formwork for concreting round shaft shafts are known, which consist of a folding cylinder and a frame frame.

The difference between the proposed formwork for concreting shaft STARS and the known ones is that it is made in the form of a metal sliding cylinder with a rigid frame frame, on which jacks are mounted with rods equipped with hinge spots, through which the formwork is mixed in the shaft .

The proposed opa is also characterized by the use of a cylinder attached at the perimeter, at the border with the lining of the previous entry, inclined pipes for supplying concrete to the underfilling space, and the height of the formwork is determined taking into account the overlap of the support of the previous entry.

Such an arrangement of the formwork is technically feasible, since it provides for the removal of the suspension equipment and automatic centering of the layout when installing it for the next stopping.

FIG. 1 shows a pre-slab formwork without suspension at the moment of its transfer to a new concrete ring; in fig. Formwork 2 in the original position for concreting the ring.

Bottom formwork without suspension is a metal cylinder. By means of brackets 2, the cylinder is connected to a rigid frame 3, on which four or six hydraulic jacks 4 are fastened. Pa of distance I from the upper edge, along the perimeter of the cylinder, pipe sections 5 are welded from the inside through which concrete is fed over the formwork using a concrete pipe 6 and a telescope 7. This method of supplying concrete provides drainage of water entering from above the trunk.

No. 131722-2 2 simultaneously to leave holes 8 under the reinforcement on the formwork; the elements are hingedly fixed in the shape corresponding to the holes.

In order to prevent the formwork, a lead is used: Bv chemical jacks (4-b) of the corresponding capacity of one of the known structures.

The working height of the formwork is taken as far as possible according to the mining technical conditions, but is necessarily a multiple of the distance to the reinforcement itself, thus ensuring the possibility of leaving holes to seal the ends of the reinforcement.

Shifting the formwork to a new find is as follows.

The exploded rock is leveled to plumb and patterns. Then, from the cylinders of the jacks they release the rods I and the supporting points JO on the pattern and plummet are installed on the blasted rock. Open elements //, forming holes for reinforcement. With the aid of tightening bolts with a me- chanical drive 12, the diameter of the cylinder of the formwork is reduced by 5-10 cm. The formwork is supported by hydraulic jacks and then, under the action of its own weight, is lowered.

The formwork is centered automatically due to the overlapping of the previous approach to the height H and the precise installation of the support jacks, so the required trimming of the formwork at the end of the descent takes a certain geometrical position.

The hold of the old-cob on the entry of freshly-wet concrete, when the forest is removed from under the hydraulic jacks, occurs due to the adhesion of the formwork to the concrete of the same and previous rings.

Subject invention

Claims (3)

1. Mobile backfill formwork for concreting shafts is different, and in order to eliminate suspension equipment, it is made of a metal sliding cylinder with a rigid frame frame, on which jacks are mounted with rods equipped with hinged joints, by means of which formwork moves in the trunk. 2. The form for making the formwork according to claim 1, characterized in that along the perimeter of the cylinder, at the border with the support of the previous approach, inclined pipes are attached for supplying concrete to the bottom-up space. 3. The form of the formwork for PP. 1 and 2, characterized in that, in order to provide automatic centering of the formwork when installing it for the next stowage, the height of the formwork is taken in view of the overlap of the previous stowage,