ISSN:
1570-1468
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Conclusions 1. The method developed on the basis of Soviet and foreign experience of on-site investigations was completely effective and allowed routine monitoring of the static work of the structures of the investigated tunnel during its construction. 2. Routine monitoring of the behavior of workings during driving and construction of the tunnel and DVA substantiated the possibility of increasing stretches with lightweight linings by respectively 400 m and 520 m and effected a considerable savings due to a reduction of the expenditure of materials and labor. 3. For the successful development of on-site invetigations of underground, especially hydraulic, structures, it is necessary to solve problems related to the development and provision of the industrial production of a number of measuring means analogous to foreign ones, in particular, deformometers and extensometers of various types, since the presently produced instruments of the LDST series and the LSST-2000 and -5000 used for these purposes are cumbersome and inconvenient in practical use. 4. An analysis of the results of the investigations during a more than 4-yr period permits the conclusion that the tunnel and adit in the monitored stretches are in a working (safe) state. 5. The character of the temporal variation of displacements of the contour of the workings and the forces in the support rock bolts indicate that in the main the loads on the support of the lightweight lining have stabilized, but since individual instruments are recording tendencies of an increase of forces in the rock bolts and continuing displacements of the contour, observations by means of the installed MMI and geophysical measurements in these stretches of the structures should be continued.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01428060
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