Rock falls onto the highway and interrupts the traffic.

Rockfall Barrier

Various Rockfall Barriers Meet Your Rockfall Protection Requirements

In mountain regions, infrastructure facilities and settlements are commonly subject to rockfall hazards. Rockfall is defined as a single rock or group of rocks become detached from the rock face and move downwards while energy and velocity become increase by time. It is a major hazard in rock cuts for highways and railways in mountainous terrain. Whether the rockfall is large or small, it can damage or destroy vehicles, lead to accidents, interrupt traffic flow, and even damage the roadway and cause death. As a result, establishing rockfall barrier in places where highways or railways are built through mountains, planning for the inevitability of rockfalls is essential.

What is rockfall barrier?

Rockfall barrier, also known as rockfall fence, is a physical barrier that is designed to prevent and control rocks and debris from falling and causing damage to people and infrastructure (highways and railways) in mountain terrains.

Rockfall protection can be either active or passive. Active rockfall protection is necessary when there's a real danger of falling rocks. Therefore, it must be designed to be capable of absorbing the impact of the falling rocks and containing these rocks in a way of reducing danger and presenting safeguards for people and property. While when the active rockfall protection is impossible, passive rockfall protection is used as a preventive way of controlling rockfall. It is commonly constructed at location distant from the rockfall source that intercept or divert falling or rolling rocks. It is not intended to prevent rockfall from occurring, but rather to mitigate its effects. Sometimes, the two measures are taken together to provide better rockfall protection effect.

Active and passive rockfall protection measures are taken for rockfall protection.
Products

Rockcon® system is one of the most widely used rockfall barriers. Rockcon® mesh is the most important part of this rockfall barrier. It is a single twisted mesh made of high tensile steel wire with a tensile strength of at least 1770 N/mm2, which makes the Rockcon mesh have excellent resistance to mechanical stress and high impact forces. In addition, it has outstanding corrosion resistance and enjoy a lifespan that lasts for nearly a century. There are a wide range of mesh sizes to meet different engineering requirements. All these characters make it a popular option for both active and passive rockfall barriers as shown below.

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Products

Reinforced rockcon system is another popular rockfall barrier. Reinforced rockcon mesh is the main part of this rockfall barrier. Much like the Rockcon® mesh, main difference between two meshes lays in three strands of high tensile steel wire are twisted first and then made into a rhomboid shape to provide higher impact resistance than single twisted rockcon mesh. Besides, it has a mesh width of 130 mm whose size is much larger than that of Rockcon mesh. Therefore, it is especially suitable for slopes with large stones and boulders. In order to achieve better rockfall prevention, it commonly works with Rockcon® mesh or hexagonal mesh to prevent smaller stones and enhance the overall performance of this rockfall barrier.

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Ring net system has the highest strengths of any mesh in the rockfall system range. It can be perfectly adapted to the terrain and is excellent for absorbing concentrated loads. It generally consists of ring net, steel posts, brake rings, rope anchors and support ropes. When rockfalls impact the ring net rockfall barrier, the impact force will be induced on the steel ring net and then transmit to the support ropes with which the energy dissipating devices are attached. The devices undergo inelastic deformation such that energy dissipation and interception protection are realized. As such, it can withstand impacts ranging from 500 to 8000 kJ and is an ideal choice for situations where there is a high risk of sudden impacts. As the ring net has a large mesh opening and cannot stop the movement of small rocks, it generally works with Rockcon® mesh or hexagonal mesh to increase the stability of rock slope.

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