SU1073375A1 - Method of consolidating soil - Google Patents

Abstract

METHOD FOR STRENGTHENING SOIL by moistening it and subsequent treatment with lime and sludge, characterized in that, in order to increase the strength and water resistance of the fortified soil, the wet soil is treated successively with 9.1 -14.5% lime by weight of the soil and 5.1 -10, 1% of the sludge is shale fusions, preheated to 60-120 ° C.

Description

WITH

with

SP

The invention relates to the construction and can be used in the construction of structural layers of pavement.

There is a method of strengthening the soil by successive treatment of its water, 2.0-3.0% lime and 5.0-8.0% oil by weight of the soil 1.

The closest to the proposed technical essence and the achieved effect is a method of strengthening the soil by sequential treatment of its 8-16% water, 4-5% lime and 2-4% sludge from the mass of the soil 2.

A disadvantage of the known methods is the relatively low strength and water resistance of the fortified soil.

The purpose of the invention is to increase the strength and water resistance of fortified soil.

The goal is achieved by the fact that according to the method of strengthening the soil by moistening it and then processing it with lime and sludge, the moistened soil is treated successively 9.1 -14.5% of lime by weight of the soil and 5.1-1.10.1% of the sludge preheated at 60-120 ° C.

Shale fusions are a pastoemulsion mixture of high-tonnage waste from the processing of combustible shale and include, in May. %: water 5-10; shale tar heavy fractions 45-55 and mechanical impurities 35-40. Mechanical impurities are shale-ash dust of various degrees of destruction and ash.

Water consumption,% of Prig ie,

The reinforcement of the soil by the proposed method can be carried out both at the work site using soil-mixing machines and in stationary mixers. At. This soil treatment is performed in the following sequence.

First, the soil is mixed with water, then with lime for 20-30 seconds, then the resulting mixture is mixed with the feeds, which are introduced into the soil in a heated state. Mixing the soil with the fuses takes about 30-40 seconds. The mixing time is established by laboratory, visually from the condition of complete enveloping of the particles, the soil in the ground. The resulting mixture is compacted within 0.5-1 hours after its preparation with a load of 200-250 kg / cm 2.

Example. Four variants of the proposed method for strengthening the soil were carried out, which cover its technological regimes.

Modes of testing method are given in table. one.

In tab. 2 presents the data of comparative tests of the properties of the soil, fortified by the proposed method and by the method prototype.

From the above data it can be seen that the soil, reinforced by the proposed method, substantially surpasses in terms of its properties, the soil, reinforced by the method of prototype (by durability 1.5-2 times, by water resistance is 25-30% higher, by elastic modulus 2 -2.5 times).

Table 1 Shale fuses have the following composition,%: water 9, shale resin 55, mechanical impurities 36.

28.4 31.4 36.3

table 2

17.5

32.0

Claims (1)

METHOD FOR STRENGTHENING THE SOIL by moistening it and subsequent treatment with lime and sludge, characterized in that, in order to increase the strength and water resistance of the strengthened soil, moistened soil is treated sequentially with 9.1-14.5% of lime from the mass of soil and 5.1-10, 1% of sludge - shale fusas, preheated to 60-120 ° C. >