SU1520196A1 - Method of protecting foundations of building and structures on undermine and karsted terrains - Google Patents

Abstract

The invention relates to the field of construction and concerns methods for protecting the foundations of buildings and structures in the underworked and karst areas. The purpose of the invention is to increase the effectiveness of protection against the effect of deformations of the earth's surface — achieved by forming a horizontal solid structure 2 before making the cushion 4. Dimensions in terms of design 2 exceed the dimensions of foundation 5 by the amount of compressible mass of array 1. Pillow 4 is poured in layers with tamping ground soils, after which the foundation 5 is laid on it. 1 Il.

Description

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HS

with f

The invention relates to the construction and relates to methods of protecting the foundations of buildings and structures in the underworked and karst areas.

The purpose of the invention is to increase the effectiveness of protection against the influence of deformations of the earth's surface.

The drawing shows the Foundation of buildings and structures, protected by the proposed method, a cross-section.

The proposed method is carried out as follows.

The excavation depth is exceeded to a depth exceeding the depth of the compressible stratum of the soil mass 1. Under the ditch of the excavation, a horizontal flat construction 2j is performed, for example, a reinforced concrete slab whose dimensions exceed the dimensions of the foundation 3 by the size of the compressible thickness of the mass 1. Then the construction 2 It is poured in layers with tamping pad 4 of the invisible soils. At the same time, on bases, which are laid with soils with a high specific cohesion (dense clays, etc.), it is preferable to use a sandy pad, and on bases, composed of incompressible soils of the coarse type, more preferably than a clayey, a uniform pad. On the pillow establish the foundations of 3 buildings and structures. In the case of the expected significant deformations of the soil mass when partial

five

the soil separation from structure 2 (in karst areas, as well as in underworking areas by calculation), it provides openings for the passage of casing 5 connecting 1x rods 6 with depth reference points 7 for filling the resulting cavities with aggregate with

in the hanging material. I

When a part-time load is caused

the influence of underground mining and horizontal and vertical deformations of the soil massif will be perceived by the horizontal solid structure 2 and practically will not be transmitted to the foundation structures of the building.

Claims (1)

20 claims The way to protect the foundations - the buildings and structures in the underworked and karst areas, including the installation of pillows in the soil mass is not under the basement foundation, which is due to the fact that, in order to increase the effectiveness of protection against the effects of the earth's surface deformations j, Before making the soil cushions at a distance exceeding the depth of the compressible stratum of the soil massif, they form a horizontal continuous structure, the dimensions in terms of which exceed the dimensions of the foundation by the magnitude of the compressible stratum of the massif.