Concrete trays - installation, assembly options, monolithic
The most popular components of the drainage system of a linear drainage system are concrete gutters and chutes. They are designed to overlap and discharge rainwater in construction work on parking lots, highways. Concrete trays are also used for heating mains and other similar structures.
What are they made up of
Getting to work on concrete trays, it is recommended to find out how this product was made. There are two main options:
| Вибропрессование | With this method of operation, all elements are fixed with steel cables, which are mounted in concrete. Such concrete trays can: · resist the effects of acid and alkali metals; · are not subject to the detrimental effects of road chemicals. |
| Vibrating casting | This method is slightly different from the previous one. It has peculiar disadvantages, for example: · concrete trays are highly susceptible to moisture; · they are unstable to temperature extremes and the influence of chemicals. Work with concrete trays becomes possible only with a complete set. |
A very important factor is the presence of special drainage grates, which provide:
- protection from debris into the system;
- Pedestrian and vehicle safety.
They are varied by:
- form;
- sizes;
- the depth.
Tip: the design calculation should be made of the estimated water pressure on the product.
According to the classification of the product can be divided into:
- awkward - are applied on the roads, when servicing water constructions of the precast type;
- telescopic - used for water outflow from roads under construction, tunnel bridges and in housing construction.
Installation
The asphalt concrete block is installed after the erection of a bulk layer over the pipe to the required parameters. These works should be carried out in temperature limits exceeding 0? С. If the pipe diameter is less than 1.5 m, concrete trays should be assembled directly at the installation site or at the construction site before pipe installation.
If the laying works are carried out with air temperature below 0? С, the instruction in this case recommends carrying out work on a special project. The total length of the product should not be greater than the length of the section of a similar indicator, which will give them the chance to connect them with standard corrugated parts.
Assembly options
If the gutter or tray device is made in cooperation with prefabricated units, the final production parts are installed directly at the workplace. To do this, it is necessary to process the surface inside the pipe to cleanliness and pre-fill it with a protective layer (rubber-bitumen mastic) in advance.
Laying on the bitumen base of any concrete block is done by hand. The bitumen emulsion should be cold.
Tip: at the junction of bolts, use low blocks.
Stages of the device of monolithic concrete structures:
- Cleaning the pipe surface.
- Stacking tray.
- Compacting concrete to the width of the tray.
The product is compacted with a metal vibrating rail for concrete. There is an opportunity to use vibroplatform with a working surface of a cylindrical shape, but the price of the work will be higher.
Work with concrete blocks involves laying them on a pre-treated base in a manual way in the opposite direction from the supply of this product. If asphalt trays are laid in pipes at the construction site, then they are installed simultaneously in two directions, from the middle to sectional ends or pipes. In the connecting places mounted a number of prefabricated parts of small height.
If the assembly of the collecting tray is planned, then it is delivered to the construction site using specialized containers, with shelves that are made of flat corrugated sheets. At the end of the laying, it is processed with a specially prepared bitumen emulsion.
After its complete disintegration, the assembly of the collecting tray is considered to be finally completed. The surface of this material becomes black and completely smooth.
Monolithic structures
If installation of a monolithic tray of concrete is considered, the work is performed exclusively during its repair. The mixture is delivered to the pipes in an all-metal special container. Further transportation is carried out using the built flooring.
The last element of the tray should be prefabricated, which will make it possible to remove some parts from the pipe when the mixture is laid. With this approach, the work is performed in the opposite direction from the feed mixture.
Depending on the type of concrete trays used, the following equipment is needed:
- concrete mixer;
- metal rake;
- vibroplatforms (with the presence of a working surface in the form of a cylinder);
- forsunka;
- mobile bituminous installation;
- metal engines;
- tassel;
- wooden valki.
Such a system of the device also implies the fixing of the channel and bulk slopes, taking into account the provided standards and requirements for the production process, when arranging culvert w / w pipes.
Conclusion
In this article, we learned that rain concrete trays and other products of this type can be prefabricated and monolithic, and also be made using the method of vibropressing (preferably) or vibratory casting. It was described how to properly install and repair them. The video in this article will help you find additional information on this topic.