Circular formwork is divided into three categories in terms of structure, it is used for structures with small diameter, circular structures with medium diameter and circular structures with large diameter. Each type of circular formwork for concreting is considered for its own specific method of molding and concreting. The round column formwork is designed in two pieces and then produced, and the round formwork system is used in concrete tanks, silos, etc. In this system, the concrete formwork and back straps are produced in rolled form, and for the implementation of circular molding with a high arch, arched concrete formworks that do not have belts and transverse stiffeners are used. In making a round formwork, it can be rolled with the help of a pipe or a can and the clip can be easily rounded and arched.
Round concrete formworks are usually made with diameters of 30 to 150 cm and lengths of 100 and 150 cm. The round formwork is made for a specific diameter and it is not possible to use the round formwork for other diameters. If other diameters are needed, a mushroom head can be installed on the formwork of the round columns. The round manhole formwork has an extremely smooth and polished surface with minimal seams and grooves. Manhole formwork is a type of connection that is used to connect several networks and lines together, which is generally used in water and sewage projects. Other applications of this manhole concrete formwork are used in telecommunication systems to access cable routes underground. In the following, we will examine the arched circular form by Omran Sanat Paya.
The definition of manhole form is the circular form of cylindrical wells that is used to connect multiple networks and streams and underground channels. In the sewage system, it is used to connect the sewage pipeline and direct it to a specific route or telecommunication systems to access the cable routes underground, which are usually made of concrete, polyethylene, brick, etc.
Concrete manholes usually consist of three parts:
Note: In some projects, instead of using a concrete slab at the end of the manhole, a concrete piece called a tipper can be used, the lower part of which is the diameter of the main walls of the manhole, and the upper part reaches a diameter of 60 cm, which can be used in The concrete walls of the access stairs are made of metal or plastic materials.
Arched concrete formworks and arched formworks are used to implement concrete structures such as tanks and silos. The arch form works like a standard concrete form, with the difference that it does not have the horizontal straps found in the modular concrete form, and depending on the radius of the rolled pipe behind the band, different curves can be provided. Round formworks are made like modular formworks in different dimensions and sizes and are connected to the rolled pipe by a medium clip. Molding of walls with arched sections is possible in two ways. In the first method, the diameter of the desired arch is large and can be molded in a polygonal way. In the second method, where the diameter of the arch is small, instead of using modular formworks, circular arc formworks are used in molding.
In terms of structure, the circular formwork uses three structural styles: small diameter, medium diameter and large diameter. They are designed and produced in two pieces and are used in concrete tanks, silos, etc. Here, the concrete formwork and the backs of the straps are made in a rolled form. Transverse stiffeners and arched concrete formwork without straps are used to implement circular formwork with a high arch. With the help of a rolled can or pipe and clamp, it is possible to make a round and arched formwork without any problems. The production of round formworks with a radius with the desired bending method was made possible with the advancement of technology and electric rolling machines and physical arcs and by providing plans for calculating arcs and bending angles. It started with circular columns, double-wall formworks of cement pipes, tapers, manholes and cole, and today it has reached a place where more complex arched designs and unique curved structures are offered.
Until today, circular and circular sections were often used in tanks and silos, and they implemented it in two ways:
In the method of implementing structures with arc sections that used a circular formwork and after concreting, the curvature of the formwork could no longer be changed and it was not possible to reuse it. After the execution of the polygon, the surface of the curvature is divided into several flat planes, with which the executed wall cannot be seen well in the shape of a smooth curve. But with the use of this device, it is easy to execute all circular parts with various curves, and after execution, the curvature of the formworks can be easily changed and reused in some projects.
The concrete pressure that this system can withstand is from 60kn/m² to 80kn/m² (depending on the use of 15mm or 20mm intermediate bolts). Through this tool, a minimum radius of curvature of 2.2 meters is implemented. In this system, the panels used in this system can have very large dimensions to reduce the number of concreting stages. The advantages of the circular format include the following:
This system consists of many vertical beams. To create the curvature, first a wooden model of the curved shape is made, after which the beams are installed on it, and two horizontal braces connect all the beams securely. After placing the beams and braces, the circular formwork is lifted by a crane and placed in its original location. The jacks firmly connect the formwork to the ground and prevent them from accidentally moving.
Today, circular formwork is used in many construction projects, because these forms can be used to shape all concrete structures. The use of circular forms has many advantages in the construction industry, so the production of all kinds of circular concrete forms is increasing day by day, and its applicants are increasing day by day.
Nowadays, the production of circular formworks is increasing due to the positive features of this formwork. These features include the following:
Circular formworks are used and produced in wall moulding, slab beam moulding, foundation moulding, column concrete moulding, round moulding, round section moulding, and all types of molding requirements. For molding, two-piece or three-piece round formworks are used, which can be designed and implemented from 35cm to 200cm in diameter. If the diameter of the circular structure exceeds the mentioned dimensions, arc panels and rolled tubes are used. This method is used for molding all kinds of circular tanks as well as round structures with high diameter.
Omran Sanat Paya Company is one of the circular formwork manufacturing companies that takes help from skilled and specialized forces for design and production. The activities of this company are in the field of road development and construction, and it has expert and skilled forces in all fields of production of concrete formworks.
This company produces and provides all custom and special templates for different projects, you can contact our experts to order and buy the desired product.