SU1520197A1 - Method of protecting undermined embedded structures - Google Patents

Abstract

The invention relates to the field of construction and relates to methods for protecting undermined deep-seated structures from the effects of horizontal compressive deformations of the ground mass produced. The purpose of the invention is to increase the reliability and effectiveness of protection against frontal pressure of the soil. This is achieved by means of a separating seam 4 arranged horizontally oriented against the walls of the structure at the level of its sole. In this case, the length of the separating seam 4 is selected depending on the bases of the prisms of the extraction of the natural soil massif and the soil mass, cut off by the separation seam. 1 il.

Description

SP tc

with

"to

The invention relates to the construction and relates to methods of protecting the walls of foundations, basements, tunnels, and revervoires from the effects of horizontal deformations of compression of the subsurface soil mass.

The purpose of the invention is to improve the reliability and effectiveness of protection against frontal pressure - soil.

The drawing shows the structure protected by the proposed method.

The method is carried out as follows.

At the bottom of the trench 1, concrete preparation 2 for the submerged structure 3 is arranged. Moreover, in the direction of the horizontal compression deformations () of the working base, the concrete preparation extends beyond the walls to the length of the dividing seam (on the left and right of the structure axis). In these areas, a horizontally oriented separation seam 4 is arranged, for example, of two layers of ptanga with a layer of ground graphite. Then, the formation of a soil mass 5 is made on the separation seam 4 by layering the soil around -. The backseal is 6. Moreover, the separating seam is made with a length in the direction perpendicular to the plane of the walls of the structure, more than the base of the prism of the natural soil massif, but not more than the base of the prism of the surface of the soil mass 5, cut off by the separation seam 4, subject to f 4 tg × where f is the coefficient of friction along the separation seam, / is the angle of internal friction of the bulk mass.

The proposed method provides protection for earned underground structures as follows.

Under the influence of horizontal deformations of compression of the developed soil massif (), the mutual displacement of the buried soil and the soil by an amount and 1 equal to

0

15

0 5

thirty

35

0

L1 5f-t

L 2

where L is the length of the structure in the plane

Claims (1)

The introduction of a horizontally oriented separation seam 4 under the soil mass at the level of the base of the foundation reduces the load on the walls by changing the pattern of its formation, which makes it possible to increase the effectiveness of the protection against the frontal pressure of the soil. Formula of Absorption The method of protection of the subtracted deep work, including the construction of a separating joint and a soil mass by layering the backfill, characterized in that, in order to increase the reliability and effectiveness of the protection from the frontal pressure of the soil, the separating seam is arranged horizontally oriented near the walls of the structure at the level of its base after which the separation seam is layered by layering backfilling, and the separation seam is performed. length in the direction perpendicular to the p-nom plane of the walls of the structure, more than the base of the prism of the natural soil massif, but no more than the base of the prism of the extraction of the soil massif, OTce4eHjioro separating seam, provided f tg cf, where f is the coefficient of friction along the separation seam , Lf is the angle of the internal friction of the soil massif.