Gerald Francis Borrmann
Engineers in Lafayette, CA
License number
Utah 146028-2202
Issued Date
Jan 1, 1910
Expiration Date
Apr 30, 1986
Category
Engineer/Land Surveyor
Type
Professional Engineer
Address
Address
Lafayette, CA
Professional information
Method And Apparatus For Piled Foundation Improvement With Freezing Using Down-Hole Refrigeration Units
US Patent:
4784528, Nov 15, 1988
Filed:
Jan 30, 1987
Appl. No.:
7/008700
Inventors:
August V. Spalding - Pinole CA
Richard C. Lundberg - Larkspur CA
Ronald O. Hamburger - Pacifica CA
Mahmoud H. Sabet - Hayward CA
Gerald F. Borrmann - Lafayette CA
Richard C. Lundberg - Larkspur CA
Ronald O. Hamburger - Pacifica CA
Mahmoud H. Sabet - Hayward CA
Gerald F. Borrmann - Lafayette CA
Assignee:
Chevron Research Company - San Francisco CA
International Classification:
E02D 546
US Classification:
405226
Abstract:
The invention relates to a method and apparatus for increasing the capacity of a tubular driven pile. A refrigeration unit is lowered into the pile and grouted in place above a cement plug. The area between the refrigeration unit and the plug is filled with a secondary refrigerant. Seawater fills the pile above the refrigeration unit and is used for refrigeration unit cooling. The refrigeration unit cools the brine until the soil surrounding the pile is frozen. The adfreeze strength of the frozen soil and the pile increase the pullout resistance of the pile. Further, the end-bearing capacity of the pile is increased as a result of the large frozen mass surrounding the pile.
Method And Apparatus For Piled Foundation Improvement With Freezing Using Down-Hole Refrigeration Units
US Patent:
4723876, Feb 9, 1988
Filed:
Feb 25, 1986
Appl. No.:
6/833293
Inventors:
August V. Spalding - Pinole CA
Richard C. Lundberg - Larkspur CA
Ronald O. Hamburger - Pacifica CA
Mahmoud H. Sabet - Hayward CA
Gerald F. Borrmann - Lafayette CA
Richard C. Lundberg - Larkspur CA
Ronald O. Hamburger - Pacifica CA
Mahmoud H. Sabet - Hayward CA
Gerald F. Borrmann - Lafayette CA
Assignee:
Chevron Research Company - San Francisco CA
International Classification:
E02D 546
US Classification:
405225
Abstract:
The invention relates to a method and apparatus for increasing the capacity of a tubular driven pile. A refrigeration unit is lowered into the pile and grouted in place above a cement plug. The area between the refrigeration unit and the plug is filled with a secondary refrigerant. Seawater fills the pile above the refrigeration unit and is used for refrigeration unit cooling. The refrigeration unit cools the brine until the soil surrounding the pile is frozen. The adfreeze strength of the frozen soil and the pile increase the pull-out resistance of the pile. Further, the end-bearing capacity of the pile is increased as a result of the large frozen mass surrounding the pile.