Accession Number:

ADA021867

Title:

Deep-Underground, Lined, Horizontal, Circular Openings in Rock.

Descriptive Note:

Rept. for Apr-Dec 74,

Corporate Author:

CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF

Personal Author(s):

• Lew,T. K.

Report Date:

1976-02-01

Pagination or Media Count:

67.0

Abstract:

The objective of the study is to develop design and analysis procedures for deep-underground hardened protective facilities in rock by considering the relative stiffness between the liner and surrounding rock and by taking advantage of the load-carrying capability of the rock mass. Accordingly, design considerations such as loading, mechanical properties of the rock mass, material properties of the liner materials, configuration of the facility, and excavation procedure are presented. Design concepts that transfer most of the applied load to the rock are presented. Detailed step-by-step design procedures, which considers rockliner interaction are presented for rock openings with liners made from a single material, reinforced concrete liners, steelconcretesteel conposite liners, and backpacked liners are propounded. Although the proposed design procedures were developed for hardened protective facilities, they can also be used for the design of other tunnels deep underground in rock. Author

Descriptors:

• *ROCK MECHANICS
• *HARDENED STRUCTURES
• COMPOSITE MATERIALS
• MASS
• LOADS(FORCES)
• STIFFNESS
• DEFLECTION
• STRAIN(MECHANICS)
• SURVIVAL(GENERAL)
• TUNNELS
• LININGS
• CYLINDRICAL BODIES
• STRENGTH(GENERAL)
• PROTECTION
• HORIZONTAL ORIENTATION
• EXCAVATION
• CIRCULAR
• OPENINGS
• REINFORCED CONCRETE
• BENDING STRESS
• STRUCTURAL ENGINEERING
• BENDING MOMENTS
• UNDERGROUND
• DEEP DEPTH

Subject Categories:

• Geology, Geochemistry and Mineralogy
• Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE