|Road No. 40 – Western
Preliminary design of a new section of inter-urban highway
no. 40 from Tel Aviv to Eilat. The 20 km-long section includes rock
excavations, bridges and interchanges.
Performing a preliminary geotechnical report based on available
geological data, classification of the rock mass into geotechnical
units, recommendations for using raw materials along the alignment
and planning guidance for excavation in rock.
|General geological map
||Systematic joints in chalk
Highway – Excavation in Rock
Construction of the main 86 km-long highway in Israel that runs
between the Iron and Masmia Junctions, six lanes, 10 interchanges,
94 bridges, two tunnels. The project cost is NIS 1.3 billion ($US
Performing geotechnical surveys in sections 15 and 16 as part of
the road infrastructure design, classification of raw materials,
and defining rock slope instability. Member of the Geotechnical
Monitoring Team (GMT) during the construction period for implementation
of support methods.
|Failure during excavation
||Supervising on support works
|Risk assessments of falling blocks using RocFall
– Hadid Tunnels
Two 460 meter long tunnels, each passing under the archeological
site of Tel Hadid through limestone and chalk strata.
Classification of rock mass as part of the comprehensive geotechnical
report for the tunnel design (cooperation and under supervision
of Geokom Ltd.). Geological monitoring during the construction period
including detailed mapping of the rock.
|Geological mapping at the site
||Log of geological and geotechnical data
Shemona Master Plan
Preparation of a master plan for the city of Qiryat Shemona, which is located
in the north of Israel.
Qiryat Shemona is located along the active fault of the African-Syrian
Rift. Every year dozens of seismic events are listed along this
fault line (the Dead Sea Rift) with most of them occurring in the
Gulf of Eilat. Historical evidence indicates that destructive events
occurred in the cities of Beit Shean, Tiberias and Sefad, all of
which are located in the Galilee region along the fault . Qiryat
Shemona is located in the foothills of the Eastern Galilee and extends
to the Hula valley. Consequently, amplification of ground movement
during an earthquake is anticipated due to the topographical profile
together with the existence of soft soil layers.
GGS, in cooperation with G.Y.A. Soil and Foundation Engineering
Ltd., were the geotechnical consultants for the design team. The
overall task included the involvement of two government bodies –
the GSI (Geological Survey of Israel) for preparation of detailed
geological maps (Metula Sheet) and the GII (Geophysical Institute
of Israel) to preform reflection lines and a study of site effects
in and around Qiryat Shemona.
The detailed study of seismic hazards in Qiryat Shemona is implemented
in the instructions detailed in the updated Israeli Code IS413 –
“Design provisions for earthquake resistance of structures”. The
IS413 stipulates that appropriate geological investigations must
be performed for urban planning because of the level of local horizontal
ground acceleration, specifically in the vicinity of active faults.
|GSI Report / Dr. Zaslavsky et al. 2002
Site effects in and around Qiryat Shemona
|Geology map of the area