Tunnel desing

:

OTIC FILE COPY IECHNICAL

REPORT GL-79-19

TUNNEL DESIGN BY ROCK MASS CLASSIFICATIONS
by

Z. T. Bieniawski

D-A219 783

Pennsylvania State University Department of Mineral Engineering University Park, Pennsylvania 16802

DTIC ELECTE
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MAR28 19W

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'

January 1990

Update of Technical Report GL-79-19
Approved For Public Re;tas,, Distribution Unlimited

IVPrepared for

DEPARTMENT OF THE ARMY 20314-1000

US Army Corps of Engineers
Washington, DC
Under

Contract Nos. DACW39-78-M-3314
and DACW39-84-M-1462

Monitored by Geotechnical Laboratory US Army Engineer Waterways Experiment Station T3909 Halls Ferry Road, Vicksburg, Mississippi 39180-6199

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Technical
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Report GL-79-19

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See reverse 6c. ADDRESS (City, State, and ZIP Code)

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USAEWES Geotechnical Laboratory At ,,, Sta e,and Z/PCode) 3909 Halls Ferry Road Vicksburg, MS 39180-6199

University Park, PA

16802
8b. OFFICE SYMBOL

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9 PROCUREMENT INSTRUMENT IDENTIFICATION NUMBERORGANIZATION US Army Corps of Engineers 8c. ADDRESS (City, State, and ZIP Code)

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DACW39-78-M-3314 DACW39-84-M-1462 10 SOURCE OF FUNDING NUMBERS TASK PROGRAM PROJECT NO. NO. ELEMENT NO.

WORK UNIT ACCESSION NO.

Washington, DC

20314-1000

I I TITLE (Include Security Classification) Tunnel Design by Rock Mass Classifications 12 PERSONAL AUTHOR(S) Bieniawski, Z. T. 13a.TYPE OF REPORT 13b. TIME COVERED TO_ _ FROM Reprinted January 1990

14. DATE OF REPORT (Year,Month,Day) January 1990

15. PAGE COUNT 158

16. SUPPLEMENTARY NOTATION Available from National Technical Information Service, 5285 Port
VA 22161
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Royal Road, Springfield,
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17.

18. SUBJECT TERMS (Continue on reverse ifnecessary and identify block number) by Classifications' Engineeringgeology;-.Rock masses, Tunnels Construction Park River project Rock mechanics, : Design Rock classification Rocks 19. ABSTRACT (Continue on reverse if necessary and identify by block number) This report discusses tunnel design procedures based on various rock mass classification FIELD COSATI CODES GROUP SUB-GROUP systems. A comparison is made between the tunnel support design based on the classicalTer-aghi rcak load method and the support selection based on the RSR Concept, the Geomechanic Classification. and the Q-System. These classification systems are described 4-n detail' and guidelines are given for step-by-step app]ication of the three methods. Using an actual tunnel case history, an evaluation is made of the current design practice by comparing it with the design approachesinvolving the three rock mass classification systems. It is concluded that the current design practice may lead to overdesign of support, and recommendations are made for improved procedures that would ensure the construction of safe and more economical rock tunnels. Finally, a few areas are identified where more research would benefit the current tunnel design practice, In order to accomplish the mainpurpose of this report, 20 DISTRIBUTION/AVAILABILITY OF ABSTRACT (2 UNCLASSIFIED/UNLIMITED 0 SAME AS RPT 22a. NAME OF RESPONSIBLE INDIVIDUAL namely to evaluate tunnel design C(onn n, d i

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DO Form 1473, JUN 86

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