Ring Net System Withstands Maximum Sudden Impact Among Rockfall Systems

With high strain performance, it is ideal for situations where there is a high risk of sudden impacts such as rockfalls, landslides, debris flows and mud flows. In addition, it also used to face rock slopes featuring large rock masses prone to failure as it can accommodate these high local stresses without sustaining damage. It can be installed with a low outlay of materials and man hours, which greatly reduces costs and construction time.

The technical performance of the system is dependent upon wire standard diameter, bundle configurations and the number of connection points to adjacent rings within the net panel.

It generally consists of ring net, steel posts, brake rings, rope anchors and support ropes. Of which, ring net is the most important part of the whole system. The ring is manufactured by single wire with a tensile strength of 1770 N/mm2 and two ends of lap length not less than 100 mm. Twine together ring with steel or aluminum alloy fasteners in at least three hoop uniformly distributed locking, and one is located at the two ends of the joint, in addition to the edge ring hole, 4 rings each with its surrounding buckled together. Single tool can replace installation, repair and parts of the system. It is linked together by rings made of high tensile-strength steel wire which between 5 and 19 spirals are bundled together. It has good buffering performance through its deformation and outstanding energy absorption properties. 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.

Specification
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Type RXE-500 RXE-500-R4 RXE-1000 RXE-2000 RXE-3000 RXE-5000 REX-8000
Energy Absorption Capacity (kJ) 500 500 1000 2000 3000 5000 8000
Ring Net Size R7/3/350 R7/3/300 R7/3/300 R12/3/350 R16/3/350 R16/3/350 R19/3/300
Strands of Wire 7 7 7 12 16 16 19
Wire Diameter(mm) 3 3 3 3 3 3 3
Ring Diameter(mm) 350 300 300 350 350 350 300
Supporting Rope Diameter (mm) 12–18 12–18 16–22 16–22 16–22 20–22 22
Number of U-Brakes for Approx. 80–100 RM 4 × U-150-60/13 4 × U-150-60/13 4 × U-300-K1620 4 × U-300-R20 2 × U-300-R20
2 × U-400-R20
2 × U-400-R60/5
12 × U-300-R20 2 × U-400
6 × U-400-R20
6 × U-300-R20
Distance between Posts (m) 6–12 6–12 6–12 8–12 8–12 8–12 8–12
Standard Barrier Height (m) 2/3/4/5 2/3/4 3/4/5/6 4/5/6/7 4/5/6/7 5/6/7/8/9 6/7/8/9/10/10.5
Max.Deflection Distance (m) 3.60 4.36 5.80 6.97 8.15 8.45
Residual Useful Height in the Impact Section >50% (Cat.A) >50% (Cat.A) >50% (Cat.A) >50% (Cat.A) >50% (Cat.A) >50% (Cat.A) >50% (Cat.A)
Notes:
Let's take the ring net size R7/3/350 as an example. Where R stands for ring net, 7 represents 7 circles, 3 stands for wire diameter, expressed in mm and 350 stands for ring diameter, expressed in mm.

High-tensile steel wire net

Protection against dynamic loads up to 8000 kJ. Some of the energy is dissipated by means of elastic/plastic net deformation while the majority is dissipated by the braking elements.

Low deformation

Testing that replicates field conditions has confirmed that this solution offers the lowest deflection on the market. This makes it ideal for installation adjacent to the object or infrastructure at risk.

Pre-assembled

The posts are delivered to the construction site as modules with pre-installed bundles of netting for easy installation (RXE-500 to RXE-3000 systems). This significantly reduces the installation time.

U-brake with stainless steel

This component enables linear energy dissipation and is easily accessible for inspection and maintenance. Stainless steel makes the brake extremely durable even when subjected to strain.

Lightweight and unobtrusive

The low weight of the barrier means that it can be easily installed. With its high-tensile steel wire and innovative design, this solution conserves materials, protects the environment and is virtually invisible from a distance.

First-class corrosion protection

The corrosion protection of our systems will last for generations. This means that our customers benefit from particularly low maintenance costs.
The picture shows the overall structure of the ring net system.
  • The picture shows the details of the ring mesh.

    Ring Mesh

  • The picture shows the connection of steel posts and support ropes.

    Steel Post

  • U brakes are used to connect support rope.

    U Brakes

  • Several brake rings are connected with the ring net.

    Brake Ring

  • The foundation base is firmly fixed onto the concrete column.

    Foundation Base

  • Rope anchor is firmly fixed onto the ground

    Rope Anchor

  • Support ropes pass through the steel post.

    Support Ropes

  • Three wire rope clips tighten the wire ropes firmly.

    Wire Rope Clips

  • Anchor shackles for ring net connection

    Anchor Shackles

The picture shows the details of the ring mesh.

Ring Mesh

Ring Mesh

The ring mesh is made from high-tensile steel wire 3 mm thick and with a strength of at least 1770 N/mm2. It can be perfectly adapted to the terrain and is excellent for absorbing concentrated loads. To absorb impacts ranging from 500 to 8000 kJ, between 7 and 19 strands of wire are bundled into a ring measuring 30 or 35 cm in diameter. A fine secondary mesh also stops smaller rocks and stones.

The picture shows the connection of steel posts and support ropes.

Steel Post

Steel Post

H type post is installed onto the foundation base to support the steel wire ring net. It is corrosion and rust resistance to bear the harsh environments. Additionally, the steel post is high tensile strength to support the steel ring net. The arrangement of steel post is based on the terrain and usage environments.

U brakes are used to connect support rope.

U Brakes

U Brakes

In each section measuring approx. 80 –100 m, four U-brakes are installed on the lateral ends of the support ropes. Using U-brakes reduces the strain on the support ropes.

Several brake rings are connected with the ring net.

Brake Ring

Brake Ring

It is placed along the steel wire ring net. It can reduce the pressure of the steel wire ring net. The brake ring is made of hot dipped galvanized metal, which has outstanding corrosion and rust resistance.

The foundation base is firmly fixed onto the concrete column.

Foundation Base

Foundation Base

It is used for fasten the steel post onto the ground. The foundation base is hot dipped galvanized to resist the corrosion and rust.

Rope anchor is firmly fixed onto the ground

Rope Anchor

Rope Anchors

It is made of high-tensile steel wires with 1770 N/mm2 tensile strength rope loop with double steel pipe and excellent corrosion resistance. It is insensitive to impact and is suitable for diverting forces in the direction of tension that can deviate by up to 30° from the drill axis without loss of supporting capacity.

Support ropes pass through the steel post.

Support Ropes

Support Ropes

Supporting rope is mainly used for supporting the wire rope and decompression ring. It is made of stainless-steel wire ropes, which has high tensile strength and can bear the huge attack from the stones and snows.

Three wire rope clips tighten the wire ropes firmly.

Wire Rope Clips

Wire Rope Clips

Wire rope clip, also known as u-clip or wire rope clamp, is used to fix the loose end of the loop back to the wire rope. It usually consists of a U-shaped bolt, a forged or cast saddle and two nuts. The two layers of wire rope are placed in the U-bolt. If the wire rope clips are not theft-proof type, the thread shall be secured with high viscosity glue.

Anchor shackles for ring net connection

Anchor Shackles

Anchor Shackles

Anchor shackles have a rounded shape, which allows them to take loads from many directions without developing significant side load. It works great in applications that are temporary, or require repeated quick connections or disconnections. In this system, it generally used for force-locked connecting of two individual ring net mesh panels. If the shackles are not theft-proof type, the thread shall be secured with high viscosity glue.