RU1788147C - Method for preparation of beds - Google Patents

Abstract

Usage: elimination of subsidence properties of soils in the preparation of the foundations of buildings and structures. SUMMARY OF THE INVENTION; wells with reinforced walls are formed, the soil is soaked through the wells, rammed pits are tamped, filled with rigid material, and the latter is rammed into the ground, and broadening is formed. The boreholes form a diameter equal to 0.01-0.1 of the drilling thickness, the walls of the boreholes are strengthened in their upper part. Before the soil is soaked, pipes are placed in wells with their perforated lower part to a height equal to 0.5-1.0 subsidence thickness, and the wells are filled with drainage material. After soaking the soil, water is pumped out through perforated pipes located in the wells. During pumping out water, compressed air can be injected into the soil, pumping out water and pumping air through respective neighboring wells. The formation of wells and the strengthening of their walls in the upper part can be performed by punching with a tamper working body. 2 C.p. f-ly, 2 ill.

Description

The invention relates to construction, and in particular to the preparation of foundations by eliminating its subsidence properties.

There is an accelerated method for deep compaction of subsidence soils by preliminary soaking and explosive energy,

When performing this method, the calculated amount of water is supplied through drainage wells, after which an explosion of concentrated charges located at a depth of 6-8 m is carried out. With powerful dynamic action. The speed of the process

increases dramatically. However, there are a number of significant drawbacks: strong loosening of the upper layer to a depth of 3-4 m; significant total water saturation of the thickness with extrusion of iodine to the surface; the need to replace the top layer with stronger soils; long stabilization period of drawdowns.

A known method of preparing the bases mainly on subsiding soils by forming wells with reinforced walls, soaking the soil through the wells, ramming the pits

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filling them with rigid material, ramming the latter into the ground and forming broadening.

The disadvantage of this method is the long stabilization period of subsidence,

The aim of the invention is to accelerate the subsidence of soils while organizing soil water loss.

In FIG. 1 and 2 depict base preparation techniques.

The base preparation method is implemented as follows.

The method of preparing the bases mainly on subsiding soils 1 includes the formation of wells 2, with a diameter equal to 0.01-0.1 of subsonic thickness with reinforced walls, in the upper part by pipes 3, soaking the soil 1 through wells 2. After applying the calculated amount of water and forming a moistened zone 4 begin pumping out water and ramming 5 pits .6 with tamping to create a broadening 7 of hard material. The dynamic impact on the soil of the rammer 5 makes it possible to accelerate the subsidence process and pushes water into the well. In addition, compressed air is supplied to adjacent well 8 to increase fluid loss. The drainage well 9 (Fig. 1) is made similarly to well 1 with the difference that the upper part 10 of well 9 is punched with a special tool and, due to the displacement of the soil to the sides, a low-permeable soil layer is created that does not require casing of the well. Instead of ramming, it is possible to use the device of additional wells 11, cased with pipes through which rigid material is rammed to create a carrier layer 12.

claims

Claims (3)

1. The method of preparation of the bases, mainly on subsidence soils, including the formation of wells with reinforced walls, soaking the soil through the wells, ramming the pits, filling them with hard material, ramming the latter into the soil and forming broadening, characterized in that, in order to accelerate the process of soil subsidence wells are formed with a diameter of 0.01-0.1 subsidence, and their walls are strengthened in the upper part, before the soil is soaked, pipes in the wells with their perforated lower part to a height equal to 0.5-1.0 subsidence thickness, and filling the well with drainage material, and after soaking the soil, water is pumped out through the perforated pipes placed in the wells. 2. The method according to claim 1, wherein the pumping of compressed air into the soil is carried out during the pumping out of the water, moreover, the pumping out of water and the pumping of air are carried out through respective neighboring wells. 3. The method according to claim 1, wherein the formation of wells and the strengthening of their walls in the upper part is carried out by punching with a tamper working body, g / Editor A. Behr Sosta Vitel M. Perlo at Tehred M. Morgenthal Figure 2 Proofreader M. Maximishinets