TY - CONF
T1 - Natural rock-slope stability issues at Masada national monument
T2 - 9th International Society for Rock Mechanics Congress, ISRM 1999
AU - Hatzor, Yossef H.
N1 - Funding Information:
Israel Nature and National Park Protection Authority fund this research and their support is hereby acknowledged. Eng. A. Le-viatan of INNPP A is thanked for his enthusiastic support and for professional discussions. A. Tobul and E. Campbell from Ma-sada National Park are thanked for assistance in all aspects of fieldwork. R. Holtzman and M. Tsesarsky of Ben-Gurion University are thanked for their help with monitoring system installation, data acquisition, and data reduction. A. Shapira and Y. Zaslavski of the Geophysical Institute of Israel, are thanked for their excellent topography effect study, which had to be performed under harsh field conditions and within a very short period of time. Finally, Dr. Gen-Hua Shi is thanked for allowing the author to use his new, version ofDDA. .,~
Publisher Copyright:
Copyright © 1999 SPE All rights reserved.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - The stability of three key-blocks at the snake path cliff of Masada monument is studied using 2-D and 3-D static and pseudo-static limit equilibrium analyses under dry and saturated conditions. The block size varies between 500 to 1400 tons. The response of the blocks to seismically induced ground motions is monitored using in-situ displacement transducers. All three blocks exhibited a simultaneous displacement in the order of 1mm during a single seismic event at the Gulf of Eilat. The sensitivity of the blocks to remote seismic tremors is explained by a pronounced topographic effect at Masada, amounting to amplification by a factor of 3.5. The results of the stability analyses indicate that the 3-D solution requires higher support force in comparison to the 2-D solution when water pressures in the joints is considered. It is therefore concluded that in the solution of rock slope stability problems where joint water pressures can be developed, application of two-dimensional solutions could be ominously un-conservative. Application of 2-D true dynamic DDA code in the north face of the mountain is performed where the slope consists of several hundred blocks. It is demonstrated that the duration of earthquake vibration is key factor in the numerical prediction of anticipated damage.
AB - The stability of three key-blocks at the snake path cliff of Masada monument is studied using 2-D and 3-D static and pseudo-static limit equilibrium analyses under dry and saturated conditions. The block size varies between 500 to 1400 tons. The response of the blocks to seismically induced ground motions is monitored using in-situ displacement transducers. All three blocks exhibited a simultaneous displacement in the order of 1mm during a single seismic event at the Gulf of Eilat. The sensitivity of the blocks to remote seismic tremors is explained by a pronounced topographic effect at Masada, amounting to amplification by a factor of 3.5. The results of the stability analyses indicate that the 3-D solution requires higher support force in comparison to the 2-D solution when water pressures in the joints is considered. It is therefore concluded that in the solution of rock slope stability problems where joint water pressures can be developed, application of two-dimensional solutions could be ominously un-conservative. Application of 2-D true dynamic DDA code in the north face of the mountain is performed where the slope consists of several hundred blocks. It is demonstrated that the duration of earthquake vibration is key factor in the numerical prediction of anticipated damage.
UR - http://www.scopus.com/inward/record.url?scp=3042630257&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:3042630257
SP - 1621
EP - 1628
Y2 - 25 August 1999 through 28 August 1999
ER -