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Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
Proceedings of the 18
th
International Conference on Soil Mechanics and Geotechnical Engineering, Paris 2013
tlements monitoring system. Nevertheless, geodetic monitoring
of root piling operations, soil excavation and grouting operations
was done daily, for 4,5 deep ducts it was done twice a day. Fig-
ure 9 shows geodetic markers layout, whose number exceeds 90
pieces to ensure registration of all relevant displacements of the
structures.
The diagram shows that during soil excavation from the
trench there were settlements up to 6-7 mm while during grout-
ing there was observed an increase of those values to 3 mm,
followed by settlement stabilization. The check measurements in
2012 showed total absence of extra settlements of the Conserva-
tory building footings.
Fragment 2
The uniqueness of this effort consisted in that the large-scale
historic building underground development operations (very
sensitive to deformations) were carried out with practically no
extra settlements, and during these operations no cracks, even
hair-wide, were observed in the already refurbished part of the
Conservatory. These operations took just 4 months that let the
XVIIIth Jubilee P.I.Tchaikovsky Competition to be held in due
time.
REFERENCE
Petruknin V.P., Shulyatjev O.A., Popsuenko I.K., Mozgacheva
O.A. Experience in root piling for Moscow P.I.Tchaikovsky
Conservatory / Jubilee Coll. Works of Gersevanov Research
Institute of Foundations and Underground Structures. Moscow,
2011.
Figure 9 Geodetic markers layout and check markers 56, 57, 58 layout
fragment
Shulyatjev O.A., Mozgacheva O.A. Protection of existing
buildings against technological settlements and emergencies.
International Conference. St.Petersburg, 2008.
Geodetic monitoring
data, including foundation settlement da-
ta precisely, confirmed analytical results and showed that most
settlements stayed within 2…4 mm range (maximum 8 mm), the
maximum differential settlement was 0,001 (Fig. 10). Founda-
tion settlements due to root piling operations were zero. 2D
analysis showed that at the project design stage subsoil grouting
reduced extra settlements to 3 -5 mm.
Petrukhin V.P., Shulyatjev O.A., Kolybin I.V., Mozgacheva
O.A., Bezvolev S.G. Construction of MIBC “Moskva-City”.
Russian Encyclopedia of Architecture and Civil Engineering,
v. XII, Underground construction, Moscow 2008.
Shulyatjev О.А., Mozgacheva О.А. Geotechnical monitoring for
underground development and service. Russian Encyclopdia of
Architecture and Civil Engineering, v.XII, Underground con-
struction, Мoscow 2008.
Petrukhin V.P., Popsuenko I.K., Shulyatjev O.A. Utility model
patent N95687 “Drilling set-up”. 2011.
Root piling
enclosure
Soil excava-
tion, concrete
raft and duct
walls
con-
creting
Compensa-
tion grouting
operations
Construction
of floors and
equipment
installation
mm
Figure 10 Markers settlement diagram along duct walls under the Big
Hal
