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
Fabrication method of packaging substrate having through-holed interposer embedded therein
Process for the preparation of ethylene homopolymers or copolymers in a high-pressure reactor controlled by a model based predictive controller
Coffee cup stationery tab
Wake-up radio system
Display for gloves
Uplink synchronization management in wireless networks
Method and system for facilitating micropayments in a financial transaction system
  Randomly Featured Patents
Cartridge carrier and dispenser
Human knee joint stabilizing orthosis with semi-rigid, substantial encasement means for lower leg
Acoustic resonator power delivery
Brow shaver
Heat exchanger and reactor for aircraft and propulsion systems
Silencer with internal rain diverter
Metal halide lamp
Inverter output circuit
Disc brake system
Capacitance to digital conversion system