45A
Dams and embankments See also." 941169, 941211, 941236, 941324 941354 Limit analysis of weak layers under embankments Michaiowski, R L
examined. In situ monitored data and recent laboratory data are compared with measurements made during construction. These comparisons suggest initial design assumptions were inadequate and settlement, slope stability, and seepage problems may arise. Recommendations are made for future design of such landfills.
Soils Found V33, NI, March 1993, P155-168 An upper bound approach is used to analyse limit loads on finite layers of weak soil over a rigid base. Strength increase with depth and different strengths of the base interface are considered. The analysis makes it possible to account for the horizontal component of load generated by the horizontal thrust in an embankment. Results are close to published lower bound solutions. The solutions presented enable relatively simple calculation of the bearing capacity. A method is presented to predict critical height of both reinforced and unreinforced embankments. 941355 Use of field instrumentation as an aid to determine the behaviour of roller compacted concrete in an arch gravity dam Oosthuizen, C
Proc 3rd International Symposium on Field Measurements in Geomeehaalcs, Oslo, 9-11 September 1991 V2, P783-797. Publ Rotterdam: A A Balkema, 1991 Roller compacted concrete is a recently accepted dam building material in South Africa, first used on an experimental basis in 1979. The 70m high Wolwedans dam, built in 1990, was comprehensively instrumented in order to monitor the behaviour of the structure and material. Inclinometers, pressure cells, moisture monitors, temperature sensors, and strain gauges were installed. Typical results are illustrated. Applications of the monitored data include determination of the best time to grout cracked joints.
941358 Use of a platey, marly limestone in an embankment dam Brenner, R P; Straubhaar, R
Proc 26tb Annual Conference of the Engineering Group of the Geological Society, The Engineering Geology of Weak Rock, Leeds, 9-13 September 1990 P175-182. Publ Rotterdam: ,4 A Balkema, 1993 (Engineering Geology Special Pubfication No. 8) The properties of a locally available limestone, sensitive to weathering, and its use as fill for the Ataturk Dam on the Euphrates in Turkey are described. The material is distinctly bedded and intensely jointed marly limestone, locally slightly chalky and with some cherty or bituminous layers. Mineralogical analysis, triaxial and shear tests, permeability tests, and tests for alteration resistance, abrasiveness, and soundness were carried out. Test fills were constructed to establish suitable compaction procedures. Specifications for fill placement, acceptance criteria, and data on fill performance are described.
Hydraulic structures 941359 Finite element analysis of earthquake induced damage to anchored sheet pile quay walls Iai, S; Kameoko, T
Soils Found V33, N1, March 1993, P71-91 941356 Use of reliability methods for the sequential analysis of a small dam Drumm, E C; Bennett, R M; Manrod, W E
Proc Conference Stability and Performance of Slopes and Embankments Ii, Berkeley, 29 Jane-1 July 1992 V2, Pl1261136. Publ New York: ASCE, 1992 (ASCE Special Geotechnical Publication No 31) There are several possible modes of downstream slope failure in earth dams, not all of which threaten dam safety. Limit equilibrium analysis of a small dam has been carried out. Although the dam is stable, critical factor of safety is lower than desired. Based on assumed location of the first critical failure surface, an adjusted cross-section is approximated. A second stability analysis yields an additional factor of safety. Probabilistic methods are used to evaluate the safety of this sequential failure in terms of reliability index.
Finite element analysis of two anchored sheet pile quay walls in Akita Port is presented. The walls were adjacent to each other and had similar cross sections, but only one suffered serious damage. Site investigation showed the only significant difference between the locations was in SPT count of the upper strata of retained soil. The effective stress model used in the analysis can reproduce the essential features of cyclic behaviour of sand. Results of the analysis are basically consistent with observed behaviour, demonstrating its ability to differentiate between conditions for serious damage and no damage.
941360 Measurement of tension in culverts under high fills Baardvik, G; Johansen, T H; Oset, F
Proc 3rd International Symposium on Field Measurements in
Geomeehanics, Oslo, 9-11 September 1991 V2, P729-735. 941357 Long term behavior of urban fill embankments Rogers, J D
Proc Conference Stability and Performance of Slopes and Embankments I!, Berkeley, 29 Jane-I July 1992 I/2, P12581273. Publ New York: ASCE, 1992 (ASCE Special Geotechnical Publication No 31) Large earthwork fills have been constructed on the coastal hills of California to allow residential developments since the 1950s. Some aspects of their long term performance are
Publ Rotterdam: A A Balkema, 1991 Culverts and other structures under high earth embankments are subject to horizontal outwardly directed forces. Large uncertainties as to the magnitude of these forces are found at the design stage. Two such culverts have been instrumented and monitored. One is rectangular and under compacted dry crust clay. The other is respectively rectangular or circular under rockfill or compacted marine clay. Forces and related ground movements during construction are presented and discussed. Long term monitoring is planned.