Barrier

Barrier

A Barrier or barricade is a physical structure that prevents an action or object. It is expressed with the meaning of ‘obstacle’ in our language. It is the argument of caution and safety in risk management, analysis and control of risk.

What is a Barrier?

The barrier, which we frequently encounter on roads, schools, sites, hospitals and various such areas, is expressed as a kind of mechanism or system established to create an obstacle. This mechanism, which is of vital importance in order to create a safe living space, can have different designs, appearances and features depending on the area in which it is used.

Barrier

While the use of the barrier has increased significantly recently, the reason for this is the tightening of the measures and efforts to create more livable, healthy and safe areas. Barricades, which we frequently encounter especially on the highway, bus station, site, hospital or school entrances, are known to have different purposes according to their usage area.

What Does the Barrier Do?

Many people who are not yet acquainted with these types of security systems ask, “What good is a barricade?” can search for an answer. A barricade is a highly functional system or tool for ensuring the security and privacy of a place. This vehicle, which has different features according to the area it is used, is very important in terms of providing security and peace for people in living spaces.

With the use of the barricade system in living areas, vehicles were recognized and entrances and exits were controlled. If we explain this situation with an example; Thanks to the barricade system, it has become extremely easy for the residents and their vehicles to be recognized, while at the same time it has been made possible to control the number of vehicles entering the site and to prevent the entry of foreigners. Moreover, this makes the job of security guards easier.

Apart from this, the importance of the barricades used on the highways is also extremely great. The road barrier, which can also be described as a kind of defense or protection element, can aim to provide control and security in places where vehicle traffic is heavy.

Our company is a company that produces barriers in line with all kinds of purposes and services. Our company, which has come to the fore with the services it has provided for many years in this field, shows meticulousness in the use of the highest quality materials in the production of barriers, as in its other services.

Functions of Barriers

Barriers are man-made elements that serve as barriers or barriers placed on the roadside (bank and/or middle median side) in order to ensure the safe passage of traffic.

They are used in situations where the dangers that will occur if the vehicle goes off the road (something, rolling into the cliff, severe impact, crossing the opposite direction, etc.) are more risky than hitting the barriers. They are designed in such a way as to reduce the severity of impact to the occupants of the vehicle.
They are also used for purposes such as temporarily directing the traffic, blocking the road to traffic, preventing the spread of traffic noise to the environment, and curtaining the lights of the traffic coming from the opposite direction depending on their height.

Performance of Barriers

The following considerations are taken into account when evaluating the performance of a barrier
• The striking vehicle can be caught by the barrier.
• Lateral deformation and/or (transfer) of the barrier
• Stability of the striking vehicle
• Vehicle’s direction of movement after the collision
• Impact effects on passengers During the collision of the vehicle, there is deformation and/or translation of the barrier. If the lateral deformation is less, the impact effects on the passengers increase. Excessive lateral deformation negatively affects the stability and direction of movement of the vehicle. Therefore, it is important to optimize such deformations in barriers as much as possible.

The Cost of Barriers

As will be explained later, different types of barriers are used in practice. An economic consideration is also imperative when choosing between barriers with similar performance. Such an assessment should consider all of the following factors:

• Initial construction cost (on-site or prefabricated)
• Cost of transportation to the place of use
• Deployment and assembly cost
• Maintenance-repair frequency and costs
• Useful life
• Useful lifetime cost
• Scrap value

Barrier Types

Barriers used in the world can be grouped in 4 classes in general. These:

a) Steel barrier,

b) Concrete barrier,

c) Steel rope barrier

d) They can be classified as other barrier types.

Steel barrier: Steel strut, railand fasteners. Props are fixed to the road base.
Concrete barrier: Prefabricated or cast-in-place reinforced concrete elements with specially shaped cross-sections and surface geometries. They can be placed on the road surface and moved to desired locations or fixed to the road base.

Steel rope barrier: They consist of a certain number of stretched steel ropes between steel poles. Props are fixed to the road base.
Other barrier types: Some barrier types that are used less frequently than those mentioned above include: Barrier types made of wood, earth, stone or other materials are available.

Concrete Barrier

Concrete barriers can be made in-situ or prefabricated. They are designed as partially or fully steel-reinforced. Although modern methods such as slipform paver are used in in situ casting, prefabrication has become more prevalent in recent years to reduce surface roughness.
has become common. Prefabricated barriers are placed at desired locations on the road surface, either temporarily or permanently.

If necessary, they are fixed to the ground with dowels or they form barrier chains depending on each other. In the most used types, the surface facing traffic is specially shaped to be effective against impacts. Both surfaces are shaped in the “symmetrical barriers” used in the central median, and the traffic-facing surface in the “asymmetrical” barriers used in the shoulders.

The systematic use of concrete barriers on roads and the development of surface shaped barriers started in the USA from the 1950s and affected the practices in other countries, including our country. Types of concrete barriers that have been and still are being applied
In general, they are:

• GM, New Jersey, F Types and the like
• Single slope types
• Straight wall – with or without gaps

Considering the chronological order, first the U.S.A. and
Concrete barrier types and uses in Europe will be briefly mentioned, and then the situation in our country will be discussed.

Flat Concrete Barrier (Parapet)

The kinetic energy of the vehicle climbing the barrier after the collision in Jersey type, or generally double-slope, barriers mentioned above is partially converted into potential energy, and when the vehicle lands on the ground, this potential energy is converted back to kinetic energy.

There is no such energy conversion in flat concrete barriers. During the impact, most of the kinetic energy is absorbed by the vehicle being damaged.
Since the vehicle does not slip and climb up on the barrier surface, the wheels remain on the ground, reducing the possibility of overturning or rolling over. Since the vehicle wheels are designed for vertical loads rather than horizontal loads, the front wheels are damaged in the event of impact and it becomes difficult to predict how the vehicle will drag afterwards. Impact loads on passengers are higher than other barrier types.

Reverse Slope Low Barriers

The sloped surfaces of the concrete barriers direct the crashing vehicles upwards, while the reverse sloped surfaces help the vehicle to stay down. Developed by the Texas Highway Administration, the 510 mm high portable concrete barrier has a reverse slope of 2.8 degrees from the vertical on its surface.

These low barriers are mostly used at intersections and around road works, where high barriers would be inconvenient to restrict vision. The reverse slope controls the bumper of the crashing vehicle by pushing it down. Reverse Curved Low Barrier has successfully passed the crash test with a pickup truck traveling at 72 km/h. Larger or heavier vehicles have not yet been tested.

Portable, Mobile Concrete Barriers

Movable concrete barriers generally consist of blocks that are produced as prefabricated and transported to the place where they will be used and used by combining them here. They can be produced in double or single prone types. Concrete blocks are combined in chains of desired length to provide protection along the road or around the works on the road.

Search on Google :

Source : Wikipedia

Contact Us for More Information

Barrier

Barrier

Barrier

Barrier

Barrier

Barrier