The invention discloses a multi-stage shock absorption and seismic resistance system for urban underground comprehensive pipe tunnels. It includes a pipe gallery tunnel and pipeline grooves. Inside the tunnel, a multi-segment active cavity with multiple arc-shaped inner cavity walls forms a pipe shape with the same axis line as the tunnel. Each inner cavity wall has a sealing elastic contact pad, ensuring a tight seal. Adjacent active cavities connect end to end, forming an inner tunnel body that extends with the pipe tunnel. The outer wall of the inner cavity is fixed to the tunnel's inner wall by a fixed frame. The pipeline groove is installed on the inner wall of the inner cavity through a telescopic frame. The inner tunnel body can swing up and down or left and right, absorbing transverse and longitudinal earthquake waves and resisting impact and collapse.

The invention discloses a multi-stage shock absorption and seismic resistance system for urban underground comprehensive pipe tunnels. It includes a pipe gallery tunnel and pipeline grooves. Inside the tunnel, a multi-segment active cavity with multiple arc-shaped inner cavity walls forms a pipe shape with the same axis line as the tunnel. Each inner cavity wall has a sealing elastic contact pad, ensuring a tight seal. Adjacent active cavities connect end to end, forming an inner tunnel body that extends with the pipe tunnel. The outer wall of the inner cavity is fixed to the tunnel's inner wall by a fixed frame. The pipeline groove is installed on the inner wall of the inner cavity through a telescopic frame. The inner tunnel body can swing up and down or left and right, absorbing transverse and longitudinal earthquake waves and resisting impact and collapse.

An underground storage unit for storing bulk sulfur includes a base layer comprising leachate collection pipes arranged to form a grid of cells, and high strength sulfur positioned at each cell, an intermediate layer comprising high strength sulfur side walls extending from a perimeter of the base layer, and bulk sulfur positioned on top of the base layer, a top layer positioned at an extent of the side walls and comprising a first sub-layer formed from high strength sulfur, a second sub-layer formed from a rigid moisture resistant material, and a third sub-layer formed from top soil, and one or more hatches positioned at the top layer that provide access to the bulk sulfur of the intermediate layer.

An underground storage unit for storing bulk sulfur includes a base layer comprising leachate collection pipes arranged to form a grid of cells, and high strength sulfur positioned at each cell, an intermediate layer comprising high strength sulfur side walls extending from a perimeter of the base layer, and bulk sulfur positioned on top of the base layer, a top layer positioned at an extent of the side walls and comprising a first sub-layer formed from high strength sulfur, a second sub-layer formed from a rigid moisture resistant material, and a third sub-layer formed from top soil, and one or more hatches positioned at the top layer that provide access to the bulk sulfur of the intermediate layer.

A method and device for arranging a fatigue arousal section in a tunnel, as well as a road tunnel. The method includes: determining a plurality of colors and luminance of fatigue arousal section; based on a plurality of samples, generating a plurality of arousal duration models in which the drivers' arousal duration changes with stimulus quantity at multiple different vehicle speeds, wherein the samples include arousal durations of different drivers under different stimulus quantities at the plurality of colors and luminance; determining length and spacing of fatigue arousal section to be arranged according to a specified speed of the tunnel, using the arousal duration models; and arranging one or more fatigue arousal sections in the tunnel based on the determined length and spacing of the fatigue arousal section.

A method and device for arranging a fatigue arousal section in a tunnel, as well as a road tunnel. The method includes: determining a plurality of colors and luminance of fatigue arousal section; based on a plurality of samples, generating a plurality of arousal duration models in which the drivers' arousal duration changes with stimulus quantity at multiple different vehicle speeds, wherein the samples include arousal durations of different drivers under different stimulus quantities at the plurality of colors and luminance; determining length and spacing of fatigue arousal section to be arranged according to a specified speed of the tunnel, using the arousal duration models; and arranging one or more fatigue arousal sections in the tunnel based on the determined length and spacing of the fatigue arousal section.

A construction method of a structure provided with a lower structure part entirely arranged below a ground surface and an upper structure part at least a part of which is arranged below the ground surface on the lower structure part, the construction method including a step of constructing the lower structure part below the ground surface, a step of allowing a heavy object to travel on a travel route including a range that affects the lower structure part after the lower structure part is constructed, and a step of constructing the upper structure part on the lower structure part after the heavy object is allowed to travel.

A construction method of a structure provided with a lower structure part entirely arranged below a ground surface and an upper structure part at least a part of which is arranged below the ground surface on the lower structure part, the construction method including a step of constructing the lower structure part below the ground surface, a step of allowing a heavy object to travel on a travel route including a range that affects the lower structure part after the lower structure part is constructed, and a step of constructing the upper structure part on the lower structure part after the heavy object is allowed to travel.

A method of sealing and pressurizing underground facilities in planetary bodies with atmospheric pressures or temperatures differing from that of earth may include disposing at least one prefabricated, airtight plug within the tunnel system prior to forming additional tunnels or shafts within the tunnel system. Multiple plugs may be additionally disposed within the tunnel system to create various encapsulated tunnel portions optionally having differing pressures and temperatures. The tunnel system may be airtight and sealed from external, hostile atmospheric conditions, designed to facilitate safe living and work conditions in the tunnel systems and to facilitate safe movement of people and equipment between tunnels, shafts and the surface of the planetary body. Tunnel systems are defined as any variety of man-made mines and tunnels or naturally occurring tunnels such as lava tubes or caverns and the like.

A method of sealing and pressurizing underground facilities in planetary bodies with atmospheric pressures or temperatures differing from that of earth may include disposing at least one prefabricated, airtight plug within the tunnel system prior to forming additional tunnels or shafts within the tunnel system. Multiple plugs may be additionally disposed within the tunnel system to create various encapsulated tunnel portions optionally having differing pressures and temperatures. The tunnel system may be airtight and sealed from external, hostile atmospheric conditions, designed to facilitate safe living and work conditions in the tunnel systems and to facilitate safe movement of people and equipment between tunnels, shafts and the surface of the planetary body. Tunnel systems are defined as any variety of man-made mines and tunnels or naturally occurring tunnels such as lava tubes or caverns and the like.