Conclusions
1. Use of dewatering systems based on voidless drainage is most effective when dewatering slightly permeable soils in regions with a deep seasonal frost.
2. Two-story drainage with the upper and lower stories spaced 30 m apart accelerates the discharge of gravitational water from the arable layer. Results of observations on two-story drainage in experimental-production sections indicated that it discharges 2 – 3.8 times more water than systematic tubular drainage with an interdrain spacing of 10 m and a 0.2-m thick three-dimensional filter of a sandy-gravelly mixture.
3. It is recommended to use crushed stone and porous-clay gravel with a fineness of 10 – 20 mm as a filler. In that case, protection of the drain filler is, as a rule, required only from the intrusion of soil from above during construction in cohesive soils with a plasticity indexW p≥7.
4. seepage rate in a voidless drain should be lower than the scouring velocity for the soil in which the voidless drainage is placed. In the opposite case, it is necessary to lower the grade of the drains or select a filler gradation such that the seepage rate in the drain be lower than the scouring velocity.
Similar content being viewed by others
References
S. G. Gordienko, Scouring velocities in voidless drainage,Role of Land Reclamation in the "Intensifikatsiya-90" Program: Collection of Scientific Works [in Russian], Severnyi Nauchno-issledovatel’skii Institut Gidrotekhniki i Melioratsii (1986).
V. I. Shtykov, Ya. Z. Shevelev, and O. Yu. Koshevoi,Use of Runoff from Livestock-Raising Complexes in Specialized Systems [in Russian], Rossel’khozizdat, Moscow (1987).
V. I. Shtykov, "Applicability of a model of curvilinear seepage paths to determination of the filtration properties of granular materials",Izv. Vses. Nauchno-issled. Inst. Gidrotekhniki imeni B. E. Vedeneeva,209 (1988).
V. I. Shtykov and S. G. Gordienko, "Hydraulic investigations of voidless drainage",Gidrotekh. Stroit., No. 8 (1987).
Additional information
Translated from Gidrotekhnicheskoe Stroitel’stvo, No. 8, pp. 41–43, August, 1998.
Rights and permissions
About this article
Cite this article
Shtykov, V.I. Conditions for reliable dewatering systems based on voidless drainage in slightly permeable soils. Hydrotechnical Construction 32, 459–462 (1998). https://doi.org/10.1007/BF02905980
Issue Date:
DOI: https://doi.org/10.1007/BF02905980