Conclusions
1. Application of the method of underwater concreting with the use of a container is inexpedient in connection with the presence of a large number of flaws detected in the shafts of cast-in-place piles formed by this method; concreting of holes by the VAT method is preferable.
2. The strength of concrete in the shafts of cast-in-place piles increases, reaching a maximum at a depth of 0.4–0.5 the length of the shaft. Variation in strength along the shaft is explained primarily by the percentage of coarse aggregate contained in the concrete.
3. The quality of pile concrete should be monitored during all stages of pile installation, and, primarily during the stage of concreting, i.e., when there is a chance of correcting an observed defect.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
Recommendations for the Installation of Deep Drilled Supports [in Russian], Stroiizdat, Moscow (1970).
V. V. Rzhevskii, B. N. Kutuzov, and A. I. Egorov, "Application of the coring method to monitor the quality of the concrete in cast-in-place piles," Osn., Fundam. Mekh. Gruntov, No. 1 (1974).
Resolution No. 181 of the State Committee on Construction of the Council of Ministers of the USSR, passed September 25, 1972 concerning the section of the Standard Norms and Specifications II-B.5-67* "Pile foundations," Byull. Stroitel'. Tekh., No. 12 (1972).
L. I. Rogachevskii and A. I. Egorov, "On the design strength of concrete in the shafts of large-diameter piles installed in drilled holes," Osn., Fundam. Mekh. Gruntov, No. 2 (1971).
I. A. Ganichev, G. S. Kasaev, and A. I. Egorov, "Radiometric device for monitoring the quality of installation of cast-in-place piles," Gidrotekh. Stroitel'., No. 9 (1974).
Additional information
All-Union Institute for the Design and Planning of Health Resorts. Scientific-Research Institute of Foundations and Underground Structures. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 5, pp. 14–17, September–October, 1976.
Rights and permissions
About this article
Cite this article
Egorov, A.I., Ékimyan, N.B. Results of evaluation of the strength of concrete placed in the shafts of cast-in-place piles. Soil Mech Found Eng 13, 310–314 (1976). https://doi.org/10.1007/BF01705828
Issue Date:
DOI: https://doi.org/10.1007/BF01705828