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The main
task of the scientific problem is to develop the methods for an
optimal designing of underground spaces for housing of: underground
power (including nuclear) plants, industrial and utility units,
transporting and hydro engineering tunnels as well as for storing
toxic and radioactive waste etc. Structural stability of
underground spaces subject to combined effect of static,
quasi-static and dynamic loading of natural (seismic) or artificial
(industrial or technological explosions) origin is a topical issue.
The
important problem also is the selection of optimal shaft support
constructions for concrete geotechnical conditions, improvement of
its characteristics, shortening of duration, expenses and at last
risks of underground construction.
For
achieving these objectives it is necessary: to have the mathematical
models and computing programs of underground constructions with
necessary and sufficient geotechnical characteristics; to solve
appropriate tasks of underground spaces mechanics in compliance with
limiting states of operational capability; to select an optimal
variants of the underground structure from the technical and
economical point of view.
Scientists of the G. Tsulukidze Mining Institute of Georgia have
developed theoretical basis of methods for analyzing and designing
underground spaces under joint effect of static, quasi-static and
dynamic loading of natural and artificial origin. In accordance with
methods of “Limiting States of Service Ability (LSSA)” these methods
will provide much more efficient and reliable operation of the
underground structures.
On the base
of conducted theoretical investigations there will be developed
calculation methods and computer programs of underground opening on
Limiting States of Service Ability for optimal designing of
underground spaces on of various forms and applications:
- in
brittle-breakable isotropic and laminated-fissured massifs;
-
in plastic-breakable rock massifs;
-
In viscous-plastic-breakable rock massifs.
Obtained
results can be used while designing and constructing of underground
structures. They also will be useful to the decision of retrograde
tasks: for calculation of mechanical properties of massif and
in-situ pressures' by results of gauging of convergences of
excavation's points in the tunneling process.
At present time in the Mining
Institute have carried out scientific base for calculation of
underground structures on LSSA. Is developed The preliminary
schematic demonstration program – CAE DEMO. It will allow to have
general representation about structure and ideology of this method,
its novelty and distinction from the existing analogs. (To
familiarize with CAE DEMO it is possible on website of Institute -
www.miming.org.ge ).
On the
basis of development of the above-stated theoretical bases will be
elaborated programs written in modern computer languages. They
would be able to compete with in the world by known analogues: "Unwedge",
" Tunnel Assistant ", "Phase2", "Rocksupport", "Geo5" etc. and along
with them may more effectively provide the technical and economic
requirements of the object at various stages of designing,
construction and operation. |