Remedial Slope Protection for a Flood Dam on the Chadan River in Tuva

Power Technology and Engineering - Measures for slope protection were developed and installed. The reliability of the proposed protective structures was confirmed by calculation studies using the...     

Foundations formed from piles cast in punched holes

Behavioral characteristics of piles cast in punched holes, and also basic positions with regard to the design and installation of these foundations are cited.     

Leveling the Tilts of a Tenement Building Founded on Loess Soils Prone to Slump-Type Settlement by Regular Wetting

Experience is described for leveling of the tilts of a nine-story tenement building founded on soils prone to slump-type settlement by regular wetting through filtration-weep holes around the building and partially through pits excavated inside the interstitial basement. The leveling was carried out without curtailing the normal service of the building and evacuating its tenants; the building is located in an area classed with an eight-point seismicity.Publicly owned joint-stock company Tsentr Sotsial'noi Ékspertizy     

Reduction of additional loads on piles due to loading-friction forces using antifriction coatings

Conclusions 1. The use of low-strength (sand-clay, lime-clay, etc.) grouts for filling the gap between piles and the walls of leader holes having a diameter of no less than the diagonal of the cross section of the pile and a depth equal to the stratum prone to slump-type settlements is one of the most effective measures for reducing additional loads on precast piles due to loading-friction forces in soils classed as type-II in terms of proneness to slumptype settlement.2. Use of jackets formed from polyethylene film on cast-in-place piles ensures significant reduction in additional load due to loading-friction forces. In this case, however, it is necessary to adopt measures to ensure the film's longevity over the entire period during which the building or structure is occupied.3. Considering the extremely high efficiency of anti-friction coatings on piles in soils classed as type-II in terms of proneness to slump-type settlement, it is necessary to continue and expand research in this direction.Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 5, pp. 18–20, September–October, 1989.     

Implementation of fast-neutron radiography on a stationary neutron generator using a CCD detector

Radiographic images in ≈3.5-MeVdd-neutrons are obtained using a CCD detector for visualization. It is shown that radiographic images with a space resolution of ≤1 mm and 150-mm field of view at an exposure time of ≈5 min can be produced. Features of the radiography with a point neutron source of the generator type are considered.     

Characteristics of the proneness of soils to slump-type settlement

Basic positions of A. M. Dzagov's paper "Determination of characteristics of the proneness of loess soils to slump-type settlement," which was published in the No. 6 issue of 2009, are discussed.     

Experience with the installation of pile foundations for the reconstruction of existing buildings

Experience with the installation of foundations formed from piles cast in predrilled holes 250 mm in diameter with expanded compacted bases made of a dry concrete mix, and also 300 mm in diameter with expanded bases formed from tamped crushed stone is described. Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 1, pp. 21–25, January–February, 1999.