SU1170042A1 - Method of consolidating sagging loess soil - Google Patents

Abstract

A METHOD FOR CONSTRUCTING PASSING LESS GROUND during the construction of structures, including wetting the soil through the wells before filling the pores of the soil with 75-80% water and carrying out deep explosive charges of explosives, in order to reduce the duration and cost of construction by preventing the release of water to the surface of the soil, the explosions are carried out 2–5 days after the end of soaking.

Description

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The invention relates to the construction, in particular to the compaction of subsiding soils using explosive energy.

The aim of the invention is to reduce the duration and cost of construction by preventing water from reaching the surface of the ground.

The drawing shows the compacted strata of the subsiding soil, section.

The method of compaction of a drawdown loess soil is implemented as follows. In the bulk of subsiding soil 1, underlain by non-subsurface soil 2, a drill of well 3 is placed in them pipes 4 and drainage material 5. Through the latter water is supplied, maintaining its level at the surface of the earth. At the same time, the soil inside contour 6 is moistened from 75 to 80% of the condition that the pores of the soil are filled with water. 2-5 days after the end of the soaking in the pipes 4, the charges of the explosive substance 7 are placed and exploded, causing the soil to condense with a surface subsidence of S and lose its subsidence properties. During the interval of 2-5 days between the end of soaking and the implementation of explosions, the redistribution of moisture in the soil 1 and its uniform moisture within the contour 8 occur. Moreover, the moisture content of the top soil 1 decreases to a depth of 3-4 due to the gravitational movement of moisture down m that

prevents water from reaching the ground after explosions.

The proposed method of compaction of subsidence soils was experimentally tested on the site, where loess subsurface soils with a thickness of 8 m, humidity of 0.07-0.12, and density of 1.32-1.40 t / m, underlain by subscapital loess loam, were deposited. On a site measuring 15X15 m to a depth of 5.5 m at the corners

5X5 m squares 9 wells were drilled with a diameter of 0.24 m. Explosive containers were installed in each well to a depth of 4 m. Well space drainage material.

After soaking the site settlement

the amount of water, from the condition of reaching, 8 (560 m), after 4 days in the vchg-open containers filled charges of FIB: .. soy 5 kg and made explosions. li) c.; c. GGV of the explosions on the sur face of the igi:,, ::: no space was observed. Us ; ,

the stabilization of deformations (approximately mm.) was achieved after 12 days after explosions and the amount of subsidence in sections: x points of the array was 0.01-0.5–7 m. The quality of the seal was satisfactory. In nroness of the course of deformations, the condition of the soils of the upper layer of the earth allowed carrying out the excavation works and their compaction, since to a depth of 2 m the average humidity did not exceed 0.24, a value close to the optimum compaction moisture for the soil.

Claims (1)

METHOD FOR SEALING LANDING FOREST SOIL during the construction of structures, including soaking the soil through the wells to fill the pores of the soil with water by 75-80% and performing deep explosions of explosive charges, characterized in that, in order to reduce the duration and cost of construction by preventing water from entering the soil surface, explosions are carried out in 2-5 days after the end of soaking. > I 170042