1896
Proceedings of the 18t
h
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
reliability of tunnels vibration protection measures, such as
the use of spiral-wound technology for internal lining the
tunnel are suggested.
3. SUMMARY (CONCLUSION)
Data received from long-term field observations for
continuous operated embedded constructions being a part of
megapolis water discharge system as well as the results of
calculation and modeling allowed to conduct geotechnical
analysis of the residual bearing capacity and to develop
measures to ensure the safe operation of facilities of such type
under the conditions of intensive external influences.
For this section of the collector the numerical modeling
was carried out to determine the maximum allowable axis
displacement of tunnel lining. The criterion for the safety of
the construct is the maximum allowable tensile stress of the
concrete in the typical points of lining. Maximum allowable
deformation and displacement values are presented in Figure
4.
a)
As experience shows, the presence of geotechnical
tracking of environmentally hazardous facilities of such type
for the entire period of their life cycle, including design,
construction and long-term operation (even under intensive
man-induced impact) provides the safety of the stable
functioning of the megapolis utility infrastructure.
4. REFERENCES
Perminov N.A., Lombas S.V. 2004. Complete geo-technical and
monitoring services for the construction of the underground structures
in a megapolis. Geotechnikal problems on cons-truction of large –
scale and unique projects. Proceedings Of International Geotechnical
Conference dedicated to the Year of Russia in Kazakhstan 23-25
September 2004, Almaty, Kazakhstan. ISBN 9965-25-409-5 Edited
by academic of NAN RK, Dr.Sc., Professor Sh.M. Aitalyev and
Dr.Sc.,Professor A. Zhusupbekov.
Perminov N.A, 2011. Geotechics jf Had Soils-Weak Rocks.
Experience of tunnel collectors monitoring at engineering
development of underground face of megapolis. Part 3. 1705-1712.
b)
Goldshtein M.N., Lapidus L.S., Reznikov O.M., Storozhenko
V.I., Sinaevsky N.I. Particularities of dynamic properties of soils with
pulsating load on the surface. The proceedings of an international
congress on mechanics of soils and foundation engineering. –
Moscow, Stroyizdat, 1973, p.329-331.
Length of deformed section, mm
Allowed shifts, mm
Figure 4. Calculated model of the tunnel (a), the diagram of
maximum allowable tunnel lining deformation (b): 1 - Safe
displacement values after the lining has been strengthened, 2 -
reference value of allowed displacement
