RU1821539C - Method for erecting cast-in-place thin-wall arched structures - Google Patents

Abstract

Use: for the construction of monolithic thin-walled arches. SUMMARY OF THE INVENTION: Temporary flexible weights are placed on top of a concrete layer laid on the formwork and removable fasteners anchor weights in the concrete layer. 5 ill.

Description

The invention relates to the construction of predominantly reinforced concrete works. And can be used in the construction of monolithic thin-walled vaulted structures on pneumatic formwork by the method of subsequent lifting.

The aim of the invention is higher. improving the accuracy of construction and reducing material consumption.

Figure 1 shows a longitudinal section of a pneumatic formwork, a structural layer laid on it and temporary weights in the initial position; figure 2 is the same, in a top view of the cone-shaped pneumatic formwork; Fig. Z. is a plan view in a starting position on a pneumatic formwork of two positive curvatures; figure 4 - the position of the structural layer and temporary weights in a side view in the design position; on Fig, 5 is an end view in the design position until the dismantling of temporary loads;

The method is carried out as follows.

On the basis of 1 structure, a set of pneumatic formwork is laid out, consisting of an airtight shell 2,

the upper web 3, the supply duct 4. A flexible reinforcing mesh 5 and concrete mixture 6 are laid on top of the formwork kit, which is compacted. Then along the ends of the vaulted coating in the original, i.e. horizontally laid on top of the concrete mixture and attached to the structural layer in any known manner, for example using removable clamps 7, one temporary flexible at the load 8. The cargo 8 is made in the form of a hollow sleeve made of a waterproof flexible fabric material and flanged; inside the sleeve of an inert bulk material, such as sand. After supplying air to the airtight shell 2, the structural layer and the flexible weights 8 laid on it are bent. Upon reaching the calculated air pressure in the airtight shell 2, flexible weights 8. ; with its mass evenly distributed along the lengths of the ends, the structural outline layer of the arch is provided with the design outline. After the concrete has been set with the required strength, the ends of the flexible weights 8 open and release the sleeve from dry sand, which is easily poured into the set

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tara. Then, the fastening clamps 7 are removed, the released sleeve is easily dismantled and ready for use in subsequent lifting of the arches.

Using the method of erecting monolithic thin-walled vaulted structures allows saving material resources, namely, concrete mix and reinforcement laid in end fins during the erection of such structures by known methods.

Claims (1)

SUMMARY OF THE INVENTION A method of erecting monolithic thin-walled vaulted structures, including laying out pneumatic formwork on the base, reinforcing and concreting 0 the arch in horizontal position, raising the concreted arch to the design position by pumping air into the pneumatic formwork with the load of the end parts of the formwork, characterized in that, in order to increase the accuracy of construction and reduce material consumption, the load of the end parts of the formwork is carried out by laying temporary flexible weights, which are placed before lifting the formwork over the concrete layer, the weights are attached to the concrete layer using removable fasteners and the weights act on the end sections the arch with a force exceeding the force of buckling of the ends of the arch. 8 fe: with W /// // # // # / # /// ///////// / W # Sw /% rWW fi & 1 (rig 2 5 6 XL B 2 8 -6 N 1821539 6 V fizz (puzlr.