PIROTECHNICAL METHOD FOR ATTACHING A SUBSOIL WITH A LOW CARRYING CAPACITY

摘要

1. Pyrotechnic method of fixing the subsoil with low bearing capacity, in which the parameters of the soil layer to be fixed are determined, non-tabulated vertical blast holes are drilled at the intersection points of the grid of squares or equilateral triangles, oblong charges are selected, prepared and set on fire, characterized in that the blast holes are drilled with a diameter from 0.02 to 1.5 m and a depth of up to 50 m using a jet of water or slurry or clay slurry, and blast holes are spaced at a distance of 3 to 25 m, and the distance is inversely proportional to the thickness of the soil layer to be fixed, and the charges, the total length of which should not exceed the thickness of the layer to be fixed, consist of several small elementary charges spaced 1 to 10 m apart along the depth of the blast hole, with the lower end each charge is fixed with a rod whose diameter is larger than the diameter of the blasthole, elementary charges are sequentially ignited from the highest to the lowest with a delay of 0.05 to 10 milliseconds per Series, starting from one of the sides to be consolidate soil region, and their sequential ignition operate individually or in small groups with certain delays for vremeni.2. The method according to claim 1, characterized in that before drilling blast holes, a layer of loose soil with a thickness of 0.5 to 20 m is applied to the area to be fixed, which blast holes are filled with after blasting. The method according to claim 1, characterized in that the elementary charges are secured in the vertical direction in blast holes using