MONITORING OF LAZICI DAM

摘要

Lazici rockfill dam, 130 metres high, was constructed in 1982 in a gorge which, due to topography, in general might have had an adverse effect on settlement of the clay core of an embankment dam, creating conditions for the occurrence of cracks in the core. To minimize this risk, some of the solutions that were adopted in the design are summarized as follows: (a) Core zoning, effected by placing less compressible clays in the river section, and highly plastic clays toward the abutment where, according to the results of nonlinear finite-element analyses, tensile stresses were expected. (b) Shaping the core foundation in order to provide the slope of its bottom at the abutments to be continuous. (c) Preventing adverse effects of "hanging" the core against the adjacent zones, by placing the filter materials and part of the rockfill without compaction. (d) Founding the core at the abutments in a trench extended downstream, thus preventing the effect of arching. (e) Curving the core central line, with a crest length to radius ratio 232 m/800 m. A comprehensive programme of monitoring of measuring instruments and devices was implemented.