A 15m wide and 15m high 30m long underground storage facility is excavated in a massive limestone rock mass (with few random long joints). The long axis of the excavation is oriented N50°W. Traces of two major joint sets are identified as following: Joint A: plunge of trace of the joint on east wall is 29°S; trend of the line of intersection of the joint on the roof is 20°. Joint B: plunge of trace of the joint on east wall is 36°N; trend of the line of intersection with the roof is 286°.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A 15m wide and 15m high 30m long
underground storage facility is excavated in a
massive limestone rock mass (with few random
long joints). The long axis of the excavation
oriented N50°W. Traces of two major joint sets
are identified as following:
Joint A: plunge of trace of the joint on east
wall is 29°S; trend of the line of
intersection of the joint on the roof is 20°.
Joint B: plunge of trace of the joint on east
wall is 36°N; trend of the line of
intersection with the roof is 286°.
Transcribed Image Text:A 15m wide and 15m high 30m long underground storage facility is excavated in a massive limestone rock mass (with few random long joints). The long axis of the excavation oriented N50°W. Traces of two major joint sets are identified as following: Joint A: plunge of trace of the joint on east wall is 29°S; trend of the line of intersection of the joint on the roof is 20°. Joint B: plunge of trace of the joint on east wall is 36°N; trend of the line of intersection with the roof is 286°.
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