Resources Contact Us Home
Method for underground excavation

Image Number 2 for United States Patent #5678957.

A method for underground excavation below an area, without opening the area above the excavation, the method comprising constructing at least a pair of diaphragm walls, the walls being at two opposite sides of the area and extend substantially from the surface area to beneath the lowest level of the excavation. Either prior or after constructing the walls, a plurality of tunnels are bored under the surface area, with the tunnels extending from one diaphragm wall of a pair to another and having a diameter allowing them to accommodate one or more cables. Then, the one or more cables are inserted through the tunnels, and tensioned with their ends anchored to two diaphragm walls of a pair and excavating is performed between said diaphragm walls and beneath the cables.

  Recently Added Patents
Linerless labels
Biodegradable aliphatic-aromatic copolyester for use in nonwoven webs
Method and apparatus for laser strip splicing
Monitoring heap in real-time by a mobile agent to assess performance of virtual machine
Delivery of captions, content advisory and other data through digital interface
Power conversion device for electric vehicle
  Randomly Featured Patents
Dual-phone cellphone case
Hydroponic method and apparatus for cultivating vegetables and other plants
Musical tone generating apparatus, musical tone generating method and storage medium
Hydrolysis of nitriles
Method and system for correcting signal integrity crosstalk violations
Mixed esters of dicarboxylic acids for use as pigment dispersants
Safety bar including opening for releasing air engulfed between two rotating members and safety bar
In situ microscope imaging system for examining subsurface environments
Cellular network infrastructure as support for inbound roaming users
Cooling apparatus boiling and condensing refrigerant