Elimination of Water Manifestations when Constructing and Operating Tunnel and Near the Tunnel Structures

The analysis of the causes of water manifestations of different intensity when constructing and operating tunnel and near the tunnel structures is presented. The combined methods of implementation of injection works under the various geotechnical conditions with due regard for the intensity of water inflow in underground structures are proposed. It is shown that special grouting injection mixtures are used to fill large voids, cavities, and cracks (the first stage), followed by injection with the use of particularly fine disperse mineral binders to fill the capillary-porous structure of the soil, macro- and microcracks cracks, as well as other defects in the body of reinforced concrete enclosing structures. The project of elimination of water manifestations, according to which the zones of depressurization of the space behind lining with the absorption of injection suspension of not more than 5 l/min at a pressure less than 1 MPa were filled in with the injection mixture was realized, at more intense absorption the grouting mix based on Portland cement was used. After the elimination of zones of soil softening, the suspensions on the basis of a particularly fine disperse mineral binder were injected. The stages of implementation of the elimination of water manifestations, in parallel with which the restoration of waterproofing in the expansion joints was made by injection of elastic waterproofing material through the holes specially drilled at an angle of 32° with a step of 0.5 m are presented. It is concluded that the total volume of consumed injection mixtures on a mineral basis is 20 to 250 kg per running meter of the tunnel.

I.Ya. HARCENKO¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
A.I.PANCHENKO¹, Doctor of Sciences (Engineering),
V.A. ALEKSEEV¹, Engineer;
A.I. HARCENKO², Candidate of Sciences (Engineering), Director

¹ Moscow State University of Civil Engineering (National Research University) (26, Yaroslavskoye Shosse, Moscow, 129337, Russian Federation)
² ZAO “Ingeostroy” (7, Kalitnikovskaya Street, Moscow, 109147, Russian Federation)

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