An intelligent and flexible steel arch protection device for rockfall and collapse of tunnels, including an arch main body system and a flexible protection system. The arch main body system includes an arched rigid high-strength steel frame and a base. The flexible protection system includes two parallel supporting rods which are oppositely arranged on the steel frame along the circular arc of the arch. Connecting rods are arranged between the two supporting rods at intervals, and the two ends of the connecting rods are fixed to the two supporting rods. The connecting rods are sleeved with guide rods and elastic devices are arranged between the guide rods and the supporting rods. A plurality of rolling shafts vertical to the axial direction of the two-way guide rods and connected with the two-way guide rods are arranged between the adjacent two-way guide rods, and the rolling shafts are sleeved with flexile rollers.

An intelligent and flexible steel arch protection device for rockfall and collapse of tunnels, including an arch main body system and a flexible protection system. The arch main body system includes an arched rigid high-strength steel frame and a base. The flexible protection system includes two parallel supporting rods which are oppositely arranged on the steel frame along the circular arc of the arch. Connecting rods are arranged between the two supporting rods at intervals, and the two ends of the connecting rods are fixed to the two supporting rods. The connecting rods are sleeved with guide rods and elastic devices are arranged between the guide rods and the supporting rods. A plurality of rolling shafts vertical to the axial direction of the two-way guide rods and connected with the two-way guide rods are arranged between the adjacent two-way guide rods, and the rolling shafts are sleeved with flexile rollers.

A method for waterproofing a substrate includes steps of: attaching a separation sheet to the surface of the substrate; and attaching a waterproofing membrane sheet to a surface of the separation sheet by a plurality of adhesive elements having a first and second major adhesive surface, wherein the separation sheet is a non-woven fabric sheet, or an embossed polyolefin membrane sheet and each adhesive element includes an adhesive layer composed of a pressure sensitive adhesive.

The present disclosure belongs to the technical field of waterproofing, and relates to a waterproof membrane, a preparation method and a construction method thereof, and a tunnel waterproof system. The waterproof membrane includes a resin sheet layer, a non-asphalt-based macromolecular self-adhesive layer and an interface bonding layer which are sequentially disposed, where the waterproof membrane has a light transmittance of ?45%. The present disclosure provides a visual waterproof membrane, that is, light may penetrate through the membrane to make gaskets visual, and when the membrane has a light transmittance of ?45%, it has good visibility for gaskets with warm colors such as orange and red.

A waterproofing system including at least two different layers, one layer being a mounting layer and one other layer being a functional layer, the two layers being directly or indirectly connected to each other over at least parts of their opposing surfaces, wherein the functional layer includes at least a thermoplastic polymer and at least a mineral binder.

The present invention disclose a tunnel wall element comprising a lightweight body element coated with a fire resistant coating providing increased mechanical integrity of the tunnel wall element. The present invention is also related to a method of building road and railway tunnels with the lightweight coated tunnel element.

A method for repairing in-ground tunnel structures including the steps of: a) cleaning the structure to be lined; b) installing a suspension cable along the top of the tunnel; c) suspending sheets of liner composite along the suspension cable; d) applying resin to one side of the tunnel; e) bedding the liner composite into the applied resin; f) removing suspension cable once the top edge of the resin and liner composite becomes self-supporting; g) applying resin to the other side of the tunnel; and h) bedding the liner composite into the resin. The process can then be repeated along the length of the tunnel in a sheet by sheet fashion.

A method for lateral-migration-preventing production of wall surfaces made of cement-based materials and sealed against water, more particularly of walls, of structures made of reinforced concrete, comprising: erecting an outer shuttering, applying a sealing material preferably to the full area of the inside of the outer shuttering, arranging a reinforcement in front of the inside of the outer shuttering that has been provided with the sealing material, applying an adhesion promoter to the sealing material through the reinforcement, erecting an inner shuttering, filling a cement-based material into the shuttering cavity formed by the outer and the inner shuttering, and hardening the material to form a solid bond between the cement-based material and the adhesion promoter located on the sealing material, a method for lateral-migration-preventing production of floor surfaces or surfaces made of cement-based materials and sealed against water, more particularly of floors and overhead surfaces of structures made of reinforced concrete.

A method for repairing in-ground tunnel structures including the steps of: a) cleaning the structure to be lined; b) installing a suspension cable along the top of the tunnel; c) suspending sheets of liner composite along the suspension cable; d) applying resin to one side of the tunnel; e) bedding the liner composite into the applied resin; f) removing suspension cable once the top edge of the resin and liner composite becomes self-supporting; g) applying resin to the other side of the tunnel; and h) bedding the liner composite into the resin. The process can then be repeated along the length of the tunnel in a sheet by sheet fashion.

A corrosion-resistant cover system, having a corrosion-resistant cover structured and configured to be arrangeable around an object having one or more metallic surfaces that are susceptible to corrosion. The corrosion-resistant cover is operable to provide increased corrosion resistance to the object by preventing contact between the one or more metallic surfaces and ambient conditions exterior to the corrosion-resistant cover.