Controlling the quality of compaction of earth fill in the construction of high dams

Bortkevich, S. V.; Vutsel, V. I.; Chernilov, A. G.; Roiko, N. F.

doi:10.1007/bf01426729

Hydrotechnical Construction

1981

DOI: 10.1007/bf01426729

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Controlling the quality of compaction of earth fill in the construction of high dams

S. V. Bortkevich¹,

V. I. Vutsel²,

A. G. Chernilov³

et al.

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1982

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Cited by 5 publications

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“…On the basis of laboratory and field investigations of the rubble-clay soil of the core of the Nurek dam, a technology of checking the soil density with respect to fines with d < 5 mm was developed [7,8]. Graphic dependences of the density of fines on the content of fines with d < 5 mm in the soil mixture and soil density in a chunk sample were obtained.…”

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confidence: 99%

Assignment of the characteristics of clay-rubble soils in watertight components of earth dams

Burenkova¹

1987

Hydrotechnical Construction

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Tensile stresses in the roof and floor of the working are observed for all three investigated types of seismic effects: P and S Waves and effect in the form of the San Fernando accelerogram. Thus, in the roof of the work~ing for the P wave the tensile stresses reach 3.0 MPa and for the San Fernando accelerogram 9.0 MPa, and in the floor of the working the tensile stresses are respectively 5.0 and 6.7 MPa.As is seen, quite high values of tensile stresses are obtained. However, we can assume that in a real structure the tensile stresses do not reach the values obtained in the investigations in an elastic homogeneous medium. It is also necessary to take into account that the zone of occurrence of substantial tensile stresses has a local character, and the maximum values of the tensile stresses will be observed during a short time interval. Under the effect in the form of the real accelerogram the tensile stresses decrease by a factor of 3 already 0.05 sec after reaching maximum values.The method presented in this article broadens the possibility the method of calculating the stress states of underground structures given in SNiP II-7-81, since it permits taking into account the effect of the free surface and character of the seismic effect. 1982).

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confidence: 99%

Assignment of the characteristics of clay-rubble soils in watertight components of earth dams

Burenkova¹

1987

Hydrotechnical Construction

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Problems of quality control in constructing earth dams

Chernilov¹

1987

Hydrotechnical Construction

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Until recently practically no attention was devoted to problems of quality control in the construction of earth dams. The classical system of quality control of placing earth materials in dams is based on a comparison of the actually attained quality indices (dry density of the soil, particle-size distribution) and control values of these parameters regulated by the design and technical specifications on placing soils in the dam. Various standards make it the duty of geotechnical control to check possible segregation, thickness of the layers, end technology of placing and rolling the soil. The author does not know of a single construction project at which such control would be carried out systematically by the geotechnical service. This is explained by the fact that the classical system of control does not relate the results of instrumental control, which is the main one in geotechnical control, to the technologicalrequirements imposed on placing earth materials, i.e., the geotechnical service does not have the tools for evaluating technology and the more so controlling it.

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Density of placing sand-gravel and pebble soils in dams

Bortkevich¹

1982

Hydrotechnical Construction

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Controlling the quality of compaction of earth fill in the construction of high dams

Cited by 5 publications

References 3 publications

Assignment of the characteristics of clay-rubble soils in watertight components of earth dams

Assignment of the characteristics of clay-rubble soils in watertight components of earth dams

Problems of quality control in constructing earth dams

Density of placing sand-gravel and pebble soils in dams

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