RU2522712C1 - Method for construction of reinforced concrete deck intersection with large span - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method of construction of reinforced concrete deck intersection with large span includes assembly of prestressed unitised units containing channels, through which reinforcing cables are stretched and then tensioned and channels are injected. Seals are installed on the joined surfaces of prestressed unitised units, reinforcing cables are stretched into the channels of upper and lower shelves of prestressed unitised units, prestressed unitised units are tensioned in two horizontal planes by means of tension of cables, and interunit joints are injected by cement mortar in conjunction with channels.

EFFECT: simplification and reduction of construction time of deck intersection, reduction of labour intensity of installation works, increase of bearing capacity of reinforced concrete vessel deck.

5 dwg

Description

The invention relates to shipbuilding technology, and in particular to methods of forming deck ceilings of ships and floating technical equipment made of reinforced concrete having large deck spans in the hold area.

There is a method of forming a hull of a reinforced concrete vessel with deck overlapping from sections stacked on transverse bulkheads, which, due to a rigid connection by welding with the sides, fully absorb the weight of the deck without loading concrete of monolithic elements. Between themselves, the deck sections are spliced by monopolizing the intersection joints, having previously connected the reinforcing outlets and installing the formwork. (N.M. Egorov. “Technology for the construction of reinforced concrete vessels”, ed. “River Transport”, Moscow, 1961, pp. 146-151).

The disadvantage of this method is that it can be used for the construction of deck ceilings with small spans and requires a large amount of reinforcement and formwork.

A known method of constructing a bridge, flyover, which consists in the fact that it includes the construction of supports and at least one continuous along the length of the span of forming at least one branch in the cross section of reinforced concrete longitudinal beams that are made on a slipway of monolithic or precast -monolithic reinforced concrete by concreting in a removable formwork section by section with reinforcement of non-tensioned and prestressed reinforcement, part of which is strained after sliding of all sections forming the span (RU 2208084 C1, cl. E01D 21/00, E01D 21/06, publ. 07/10/2003).

The disadvantage of this method is that the span constructed in this way does not take into account the work of overlapping under alternating loads, in addition, the use of curved and polygonal channels complicates the broaching and tensioning of reinforcing ropes.

The closest known method is the construction of prefabricated reinforced concrete floors, which is the installation of prefabricated ribbed plates followed by tensioning of high-strength reinforcement, which is stretched and tensioned in the channels of the transverse ribs of the ribs described in patent RU 2117738, cl. E04B 5/02, publ. 08/20/1998

The disadvantage of this method is that the tension of high-strength reinforcement is produced only along the lower edge of the transverse ribs of the plates, which does not provide the equivalent work of the overlap with alternating loads characteristic of the deck of the vessel during operation.

The objective of the present invention is to develop a method for the formation of deck ceilings of ships and technical equipment from reinforced concrete having significant deck spans (span width of more than 25 meters).

The problem is solved due to the fact that in the method of erecting reinforced concrete deck ceilings with a large span, including the installation of prestressed volumetric blocks containing channels through which reinforcing ropes are pulled and then strained, and the channels are injected, seals and reinforcing bars are installed on the mating surfaces of prestressed volumetric blocks ropes are pulled into the channels of the upper and lower shelves of prestressed volumetric blocks, prestressed volumetric blocks are strained in two horizontal planes of put rope tension, and interblock joints are injected with cement mortar together with channels.

The technical result from the use of this method is to simplify and shorten the formation of deck ceilings, reduce the complexity of installation work, increase the bearing capacity of the deck of a reinforced concrete vessel.

Figure 1 shows the deck of a reinforced concrete vessel, figure 2 is a longitudinal section aa in figure 1, figure 3 is a transverse section bB in figure 1, figure 4 is an interblock node In figure 1. 2, figure 5 is a cross section of a prestressed volumetric block.

The construction of reinforced concrete deck ceilings with a large span, mainly rectangular in plan, is carried out as follows:

- factory pre-fabricated volumetric prestressed blocks 1, (preferably an I-beam or box-shaped profile), with through channels 2 in the upper and lower shelves 3, and releases of non-tensile reinforcement from the ends;

- on the abutting surfaces of the shelves 3 volumetric prestressed blocks 1 install seals 4 of elastic material (rubber, etc.);

- volumetric prestressed blocks 1, prepared for installation, are transported to a slipway, where load-lifting means are sequentially laid on the manufactured hull structures - sides 5 and bulkheads (not shown), starting from the embedded transom 6 and filling the entire deck opening;

- reinforcing ropes 7 are pulled through the channels 2 of the upper and lower shelves 3, fixing one of the free ends on the transom 6;

- tension the reinforcing ropes with 7 jacks and fix them using anchor devices on the last prestressed volumetric block 1 near the bottomhole transom 8. Due to the tension of the reinforcing ropes 7, the gaps between the prestressed and volumetric blocks 1 are selected and the seal 4 is crimped in the interblock joints 9, forming tight cavities;

- after tensioning the reinforcing ropes 7, the channels 2 are injected with cement mortar, at the same time the solution fills the interblock joints 9;

- the formed deck overlap is spliced with the sides 5 and the bottom transom 8. For this, the reinforcing releases of volumetric prestressed blocks 1 are connected to the reinforcing outlets of the hull structures, reinforcing the splice zones, establish the formwork (where necessary), and monopolize the splicing zones of the formed deck overlap with the sides 5 and downhole transom 8.

The proposed method for the construction of reinforced concrete deck ceilings allows:

- to form a deck of ships and technical equipment from reinforced concrete with a large span, to reduce the mass of deck ceilings and the ship as a whole, to increase the bearing capacity of the deck of a reinforced concrete vessel;

- reduce the complexity and reduce the volume of formwork and reinforcement work on the slipway, due to the installation of a sealant in the inter-unit joints;

- create a deck overlap that works equally when the vessel is deflected or bent during operation (under alternating loads) due to prestressing of volume units in two horizontal planes (in the upper and lower shelves).

Claims (1)

A method of erecting reinforced concrete deck ceilings with a large span, including the installation of prestressed volumetric blocks containing channels through which they stretch, then pull the reinforcing ropes, and inject the channels, characterized in that seals are installed on the abutted surfaces of the prestressed volume blocks, reinforcing ropes are pulled into the channels of the upper and lower shelves of prestressed volumetric blocks, prestressed volumetric blocks are strained in two horizontal planes by tensioning the ropes, and between block joints are injected with cement mortar together with channels.

Images