Surgil ESIA Report - Volume III - EKN

“O’ZLITINEFTGAZ” PC
PFS “Surgil field complex costruction with valuable
components retrieval”
First site: Surgil CGTU– Urga CGTU.
The first engineering-geological element (EGE-1) unites sandy grounds presented by
aeoline sand, non-segmented, alluvial.
It is extended in the upper and middle part of the cross-section.
Layer thickness is to 1.8m. Layer upper boundary is bedded on 0.0–2.6m depth from
ground surface.
Design resistance (R 0 ) EGE-1 to accept 150 kPa. (1.5kg/sm 3 ).
During water saturation the sand of EGE-1 accepts running condition. Design
resistance (R 0 ) – 100kPa. (1.0kg/sm 3 ). Ground group according to development – 29 B .
Angle of slide under natural humidity - 35 0 ; under water saturation - 27 0 .
The second engineering-geological element (EGE-2) includes small clays with sand
alternation, grounds are from dry to humid. Clays are in dry condition, dense, have tabular
structure.
It is extended in the lower part of the cross-section. Layer thickness is to 3.0m. Layer
upper boundary is bedded on 0.0-0.5m depth from ground surface. Grounds design
resistance (R 0 ) to accept because of presence of the sand bands 200kPa. (2.0kg/sm 3 ).
Ground group according to development – 8 F .
The third engineering-geological element (EGE-3) includes dense, small humid
clays, of Paleogene age, non subsidence.
It is extended in the lower part of the cross-section. Layer thickness is more than
10.0m. Layer upper boundary is bedded on 0.5m depth from ground surface. Ground group
according to development – 8 F .
The second site: Urga CGTU– Akchalak GCC.
The Ustyurt plateau area is presented by weak portioned relief with numerous ravines
and takyrs.
Surface waters are absent on the site.
The nearest railway station Akchalak.
Three engineering-geological elements take part in geological process:
EGE-4. Cockleshell area sub-cemented, weak solid.
Ground group according to development – 31 B .
EGE-5. Crystalline limestone. The limestone is ventilated, crumbling in layer upper
boundary, from tabular to massive. Physical-mechanical properties of limestone as follows:
Ground group according to development - 15 А .
EGE-6. Includes loamy sand, salted loams, macroporous, dry, with inclusion of
gravel and detritus to 10-15%.
It is extended in the upper part of the cross-section. Layer thickness is 0.5-1.2m.
Volume 2. Part 1. EIS Project for Surgil field construction
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