SU973712A1 - Method of constructing foundations of sagging soils - Google Patents

Description

The invention relates to property, and in particular to methods of foundations for buildings, nii, erected on soils of the type of subsidence,

There is a method of erecting the foundations of buildings and structures on subsiding soils of type I, including compaction of subsiding soils, for example, by heavy tamping, ramming out pits, followed by ¹ arrangement of foundations. At the same time, the rigidity and laboriousness of the construction of foundations is minimal [Ί].

However, this method on IJ subsidence soils is not applicable, since it does not exclude subsidence of the soil from its own floating sintering plutations

Closest to the proposed method is the impact of fundamental weights that occur below the range, and thus not a failure of power and normal driving and structures.

com on subsidence soils, including the formation of wells, filling them with drainage material, compaction of the soil by soaking through the wells and the construction of foundations, and before the construction of the foundations, the upper soil layer is compacted [2].

The disadvantage of this method is the long lead time, since the soil is first compacted by soaking, and compaction of the upper layer by tamping or other methods begins only after its moisture content drops to a value close to the rolling border, i.e., after 0, 5 1.5 months

The purpose of the invention is to reduce the time of construction of foundations.

This goal is achieved by the fact that according to the method of constructing foundations on subsidence soils, including the formation of wells, filling them with drainage material, compaction of the soil by soaking through the wells and building the foundations, before filling the wells with drainage material, they are divided into two groups with the location of wells of the same group between wells of another group, the drainage material is laid in the wells of one group to the top, and in the wells of the other group only in their lower part and the last pipes are cased s, produce soaking through cased wells, and the construction of foundations start humidity advances in the top layer of soil near to Coy, humidity at the interface rolling by vytrambovyvaniya pits and foundation apparatus body or by piling.

In this case, the foundations are erected between wells cased by pipes.

In FIG. 1 shows a base prepared for soaking, a section, in FIG. 2 - foundation, erected by the proposed method.

The method is as follows.

Work begins with excerpts from pit 1 and drilling groups of wells 2 and 3. Wells 2 of one group are located between wells 3 of another group. In the well 2 of one group, the draining material 4 (sand, gravel, crushed stone, etc.) is laid to the top, and in the well 3 of the other group - only in their lower part, usually to a height of 0.20.5 of their depth, after which these wells casing pipes 5 (metal ·, asbestos, etc.). After this, the soil is soaked by supplying water through the wells 3. Upon reaching soil moisture in the upper layer close to the humidity at the rolling border, foundation 6 is started by ramming the foundation pit (not shown) and foundation body device (not shown) by concreting the pits . Instead of tamping the pits, the compaction of the upper soil layer can be carried out by driving piles. In the process of building the foundations, the soil is soaked through the wells 3 until it is completely compacted in the lower zone of the base. After stopping the soaking, the casing 5 is removed from the wells 3 and filled with drainage material 4.

The proposed method for the construction of foundations on subsidence soils by combining soil compaction with soaking and device 3 foundation provides a reduction in the time of construction of foundations compared with the known for the time required to reduce soil moisture in the upper layer to a moisture content on the 10th border rolling, which is usually 0 , 5-1.5 months. In addition, the proposed method significantly improves the working conditions of the mechanisms moving on the ground of natural and 15 usually low humidity, and in general the production technology.

Claims (2)

3 of their drainage material, soil compaction by soaking through wells and building foundations, and filling wells with drainage material are divided into two groups with the location of the wells of one group between the wells of the other group, the drainage material is placed into the wells of one group to the top, and another group — only in their lower part — and they are cased on the latter with pipes, soaking is performed through cased wells, and construction of the foundations is begun on the achievements of viscosity in the upper layer of soil, close to The second is the humidity at the border of rolling out, by ramming pits and making the foundation body or by driving piles. In this case, the foundations are erected between the wells cased with pipes. FIG. 1 shows the base prepared for soaking, the section in FIG. 2 shows the foundation erected by the proposed method. The method is carried out as follows. Work begins with fragments of boiler 1 and drilling of groups of wells 2 and 3. Wells 2 of the same group are located between wells 3 of the OTHER group. In the well 2 of one group, the drainage material A (sand, gravel, crushed stone, etc.) is laid to the top, and in the well 3 of the other group - only in their lower part, usually at a height of 0.20, 5 their depth, after which these wells cased pipes 5 (metal-, asbestos, etc.). After that, the soil is soaked by supplying water through wells 3. Upon reaching the soil moisture in the upper layer close to the moisture at the rolling boundary, foundation construction 6 is started by removing the foundation pit (not shown) and making the foundation body (not shown) by concrete pouring in th Instead of tamping down the pits, the topsoil can be compacted by driving piles. In the process of foundation construction, the soaking of the soil through the boreholes 3 is continued until it is fully compacted in the lower zone of the base. After soaking, casing 5 is removed from wells 3 and filled with drainage material 4 The proposed method of erecting foundations on subsiding soils by combining soil compaction with soaking and constructing the foundation reduces the time required for building foundations reducing the soil moisture in the upper layer to a moisture content at the border of rolling, which is usually 0.5-1.5 months. In addition, according to the proposed method, the working conditions of the mechanisms moving along the natural and usually low humidity soil, and in general the production technology are significantly improved. Claim 1, Method of erection of foundations on subsiding soils, including the formation of wells, filling them with draining material, compaction of the soil by soaking through wells and erection of foundations, which, in order to shorten the time of foundation construction, before filling the wells with draining material, are placed in two groups with the location of the wells of one group between the wells of the other group, the draining material is placed in the wells of one group to the top, and in the wells of the other group - only In the lower part they are cased with pipes, soaking is performed through cased wells, and construction of foundations is started upon reaching moisture in the upper soil layer close to the moisture content at the border of rolling out by tamping down the foundation pits and building the foundation piles. 2. A method according to claim 1, characterized in that the foundations are erected between wells surrounded by pipes. Sources of information taken into account in the examination of 1, Bagdasarov Yu.A. and others. Ways to improve the efficiency of the device bases and foundations on type I soils by subsidence. - Foundations, foundations and soil mechanics, 1979, No. 5.. 2. Handbook on the design of the foundations of buildings and structures. NIIOSP them, N. M. Gersevanova. M., stroiizdat, 1978, p. 270-278. wasp lfOC7 VXXX V, -five U OOOIf oooh 00, body seal