10-23-2009, 09:14 AM
Trenching and Shoring Manual - STATE OF CALIFORNIA
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The California Department of Transportation Trenching & Shoring Manual was originally developed by the Office of Structure Construction in 1977. Its purpose was to provide technical guidance for Structure's field engineers analyzing designs of trenching & shoring systems used in the California Highway Construction program.
This 1990 updated manual edition continues to be devoted to the analysis of trench and excavation earth support (shoring) systems. Its main objectives are to inform the Engineer of California's legal requirements, and to provide updated technical guidance for analysis and review.
The Engineer should bear in mind that this manual is a book of reference and instruction to be used in respect to the administration and engineering of excavation shoring. In cases of conflict, the contract documents shall prevail. Current concepts in soil mechanics or geotechnical engineering are summarized in order to better acquaint the reader with the practical considerations and accepted application of theoretical principles. Situations or conditions which may cause difficulty are noted. A section on earth tiebacks has been added to this 1990 edition.
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