The present invention describes an electronic device (2) and corresponding method for monitoring hydrogeological phenomena, in particular the integrity of a rockfall protection barrier by detecting mechanical load exceeding a threshold, such as due to impact or debris flow. The device is provided with elongated flexible “legs” protruding from the housing in a radial manner and connected to a surface to be monitored (i.e. rockfall net) for detecting mechanical stress.

A combined energy dissipation scaffolding structure for preventing falling rock hazards for high and steep side slope during highway construction. The combined energy dissipation scaffolding structure mainly comprises five parts: a top surface impact-resistance system closely jointed with the existing slope surface, a top surface support system composed of 3D stereographic steel frame systems, a scaffolding body structure composed of a cross beam and support steel-pipe posts at both sides, a mountain-side anchorage system for anchoring the top surface impact-resistance system and the scaffolding body structure, and an anchoring-type steel-plate concrete composite foundation, wherein a fixed base is welded with the bottom of the steel-pipe post and is driven in the foundation soils using anchor rods. Compared with the traditional shed tunnel structure, the combined energy dissipation scaffolding structure has the advantage that the construction time is greatly reduced, thereby being beneficial to making road unblocked and improving anti-disaster capability.

The present invention is directed to a horizontally extendable silt fence. The present invention is also directed to a silt fence system comprising a horizontally extendable silt fence comprising a water permeable geotextile material having an upper edge and a lower edge, and a plurality of posts comprising an upper portion strutted and arranged to be coupled with the upper edge of the water permeable geotextile material, a lower portion structured and arranged to be coupled with the lower edge of the water permeable geotextile material, and an anchor portion structured and arranged to be driven into the ground to anchor the post. Also disclosed is a method of filtering silt from a fluid stream.

The present invention is directed to a horizontally extendable silt fence. The present invention is also directed to a silt fence system comprising a horizontally extendable silt fence comprising a water permeable geotextile material having an upper edge and a lower edge, and a plurality of posts comprising an upper portion strutted and arranged to be coupled with the upper edge of the water permeable geotextile material, a lower portion structured and arranged to be coupled with the lower edge of the water permeable geotextile material, and an anchor portion structured and arranged to be driven into the ground to anchor the post. Also disclosed is a method of filtering silt from a fluid stream.

A hexagonal wire netting (7), a process for manufacturing such a wire netting and a device for manufacturing a hexagonal wire netting (7), the device comprising an assembly of tubes (5) for leading the wires (1) of which every other is twisted into a spiral shape, a spindle (6) assembly and a drum (8) receiving the wire netting (7), the drum (8) being provided with &tent elements (21). Between each tube (5) leading the spirally twisted wire (I) and the cooperating spindle (6) a straightening guide (IO, IO′) is located having an inlet opening (13, 15) cooperating with the tube (5) and an outlet opening (12, 20) cooperating with the spindle (6). The detent elements (21) are arranged on the drum (8) in such a way that the produced wire netting (7) has meshes in which the proportion of the width (A) to the length (B) is less than 0.75.

A hexagonal wire netting (7), a process for manufacturing such a wire netting and a device for manufacturing a hexagonal wire netting (7), the device comprising an assembly of tubes (5) for leading the wires (1) of which every other is twisted into a spiral shape, a spindle (6) assembly and a drum (8) receiving the wire netting (7), the drum (8) being provided with &tent elements (21). Between each tube (5) leading the spirally twisted wire (I) and the cooperating spindle (6) a straightening guide (IO, IO′) is located having an inlet opening (13, 15) cooperating with the tube (5) and an outlet opening (12, 20) cooperating with the spindle (6). The detent elements (21) are arranged on the drum (8) in such a way that the produced wire netting (7) has meshes in which the proportion of the width (A) to the length (B) is less than 0.75.

A flexible barrier includes: posts, retaining ropes and a metal net; wherein each of the posts comprises a post body and a post foundation hinged; the retaining ropes includes longitudinal retaining ropes, top retaining ropes, intermediate retaining ropes, and diagonal retaining ropes connected between the posts and the metal net; wherein a lower portion of the metal net is obliquely arranged towards a downstream of a slope; the metal net is loose when no impact is applied and a bottom of the metal net is fixed with short anchors; the bottom of the metal net has a redundancy and is folded towards a upstream of the slope or buried in the slope.

A flexible barrier includes: posts, retaining ropes and a metal net; wherein each of the posts comprises a post body and a post foundation hinged; the retaining ropes includes longitudinal retaining ropes, top retaining ropes, intermediate retaining ropes, and diagonal retaining ropes connected between the posts and the metal net; wherein a lower portion of the metal net is obliquely arranged towards a downstream of a slope; the metal net is loose when no impact is applied and a bottom of the metal net is fixed with short anchors; the bottom of the metal net has a redundancy and is folded towards a upstream of the slope or buried in the slope.

A protective structure is provided that is configured to crush descending items into particles. The protective structure comprises an upper mesh layer made of hard material capable of crushing the descending items and a bottom layer made of combined hard material and relatively soft material, wherein the bottom layer is capable of absorbing the particles. The protective structure is further provided with a plurality of supporting poles that are positioned between the upper mesh layer and the bottom layer.

An avalanche control device includes a detonation initiator unit and a bio-degradable linear bag. The initiator unit is elongated and includes an ignition end, an inflation end, and a stepped transition zone in between that gets progressively greater in diameter as it extends from the ignition end towards the inflation end. The inflatable bag is adapted for connection to the inflation end of the initiator unit. The design of initiator unit is fixed and reusable, while the bag dimensions can be tailored to the desired blast strength for the end user, in terms of length, diameter, and mixture ratio.