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
Manufacturing method of a piece in a tire mold for molding
Systems and methods for providing improved power performance in wireless communication systems
Light-scattering substrate, method for manufacturing light-scattering substrate, polarizing plate and image display device
Substrate with transparent conductive layer and method for producing the same, and touch panel using the same
Method and arrangement for maintaining cell coverage
Method of alloying various grades of steel with manganese oxides
Methods and systems for magnetic media servo writing
  Randomly Featured Patents
Method and apparatus for directing air flow within an intubated patient
Cleanout port for gas-operated firearms
Method for purifying gas distribution systems
Synergistic microbicidal combinations containing 4,5-dichloro-2-octyl-3-isothiazolone and certain commercial biocides
Emergency-opening sliding door
Highly light-scattering pigment mixture
Cross-linkable copolymers and hydrogels
Dynamic barge-in in a speech-responsive system
Knee pad for babies, toddlers and small children