SU97725A1 - Movable formwork - Google Patents

Description

The invention relates to movable forms for erecting bridge pillars and the like constructed with inclined granite pl.

The introduction of mobile formwork into the practice of building bridge pillars was prevented by the fact that intermediate bridge pylons usually have a tapering shape that requires a change in the perimeter of the formwork as it rises. The solution of such a task requires a corresponding complexity of the formwork design, as well as the complication of the operation with this tool in the production of works.

For solving the task, the in-structure formwork had significant drawbacks consisting in the unsatisfactory work of the formwork (damage to the fresh concrete masonry, distortion of the geometric shape of the structure), complication of both the formwork design, and lifting operations, increasing the formwork formwork and that. d.

The invention aims to reduce the noted drawbacks by the implementation of automatic formwork (when it is raised) using relatively simple design means.

Inventory 5 mobile formwork d, h erection of bridge pillars and similar structures with inclined edges ,; mi has a spacer frame 13 of the form of 6 removal of shields formwork horizontal frame. The frame elements (beams or trusses) are fastened at the corners with the possibility of mutually alternating 1, to change the dimensions of the frame as we lift the opals.

A distinctive feature of the described formwork is that in order to automatically change the size of the formwork in the plan at the same time as raising it, the wedges of the angular non-sectional section are applied, and at the ends of the elements constituting the frame, on the outer sides there are outer corners of the frame and wedges are located.

To prevent the formwork imbalances in the plan, in each corner of the expansion frame, a packing is fixed, fortified on the bolt, prop.

Mr. G, slots, ps, pits of the frame, frame elements and rollers, abutting against the lateral faces of the frame elements and preventing them from enlarging (111).

Pa figs. 1 and 2 illustrate an exemplary design of the mobile i-frame; the repro-gil support process (in Fig. 1 - a side view and a vertical section; Fig. 2-p.; 1 or n horizontal cuts, i-fold; -1; n. x ro, n) x; on . 3 and 1 - constituting the horizontal formwork, in two projections.

The framework is open to the horizontal pressure of concrete. The action of K on the shields are the four enclosing trusses 1 1 / n 2 forming a quadrangular horizontal frame.

The trusses are arranged in two sizes, but the height is the same, so that the truss 2 freely passes between the truss themselves. For trusses fasc. In the middle of the frame there are metal curved shields 4.

At each side of the truss there is a p. A on the side of the truss. resistant pystuns 7. The rectangular holder, formed by four ferli.mi. brace cln. mn 5, inserted between their respective protrusions 7 in the outer corners of the frame. In the presence of internal tension, the concrete turns into a rigid system. The slope of the truss corresponds to the bevel HO.:IOK of the corner wedge. The slant of wedges is made in accordance with; And with the | project design of the BLOCKED faces of the supports. The projections 7 are arranged to the row with a pin, corresponding to the size of the bevel of the useful wedge length.

Corresponding to 1 (: on the protrusion, the protrusions should be strictly vertical along the alignment, which ensures the vertical position of the wedge edge, the free entry of wedges and the required angles) of the support faces.

. Kovy i.:. It is necessary to have a kit in the kit. The wedge is fastened to the foundation of the support using anchor bolts. The rear wedge is stationary, and the trusses with the rails and the rear of the screws with the jack 7 / with the help of the suspensions .9 supported by the rollers 10 on the frame 12, while the wedges gradually become open. frame, reducing its terimeter in accordance with the bevel of clees.

Before the shuttering of the formwork from the first set of yards, a second set of livers is installed, which is inserted into the subsequent projections 7 on the trusses. Pervp5 and the second sets a series of all the time, installed between the new projection am1 to the vertical axis of the support. There should be as many protrusions on the truss as there are wedges that need to be installed. The lines are rearranged as they rise, as if from a chain. the role of the actors in the rigid frame.

Anchors m 6 6 ascending 0, the Alyubki are increasing during the i welding area. Steps for corner wedges are arranged. The discussion between the intermediaries should strictly correspond to the useful length of the wedge.

To eliminate the possibility of changing the rectangular form of the formwork in the plan at each corner of the formwork in the intersection of the trusses between them, the gussets 5 are set, so as to ensure the preservation of right angles in the process of reducing the perimeter of the formwork. Each piece is provided with two rollers 13, abutting on overlapping trusses. The fasteners are fastened at the corners of the intersecting trusses 1 and 2 with the aid of bolt 14 passing through grooves 15 made in sah farms. Thus, the gusset prevents the angle of the horizontal frame from increasing.

All the four corners of the races, these) 1 of. Of.men are not possible. Fasopki, not preventing the mutual displacement of trusses, securely fix the angle of their intersection.

The control of the first formwork is carried out with the help of levels and in the form of collectively existing vessels. In the course of the production work, the surfaces to be rubbed should be constantly lubricated.

Subject invention

Claims (2)

1. Movable formwork for erecting bridge supports and similar structures with inclined sides, having a support frame in the form of a horizontal formwork enclosing shields, the elements of which (beams or trusses) are fastened together in the corners of the frame with the possibility of their mutual displacement to change the size of the frame characterized in that for automatically resizing the formwork in plan at the same time as raising it, guiding wedges fixedly mounted in the outer corners of the frame between the thrust protrusions at the ends of the elements were used, oedin constituents frame. 2. The formwork according to claim 1, so that in order to prevent misalignment of the formwork in the plan, in each corner of the expansion frame there is a gusset mounted on the bolt that was missed in the gaps and made, 1x in frame elements, and having rollers, abutting against the lateral faces of the frame elements and preventing an increase in its angle. Sha J i 1 and L i p i / -. . .:.one- , -.-. , L- .tp m d d w 7 / G. J  wDpmD La am d i. 11 vT shs ifa- JJJJn zJ (Rig.4