SU1652440A1 - Method for protection of buildings and structures from shear deformation of ground - Google Patents

Abstract

The invention relates to the construction and relates to methods of protecting buildings and structures from shear deformations of the ground and the conditions of tunneling of subway shallow foundations and workings in dense urban buildings. The purpose of the invention is to increase the reliability of protection of buildings when tunnels are tunneling under them - due to the fact that vertical elements 2 are installed before tunnels are tunneled with their tips above the ground surface with the formation of longitudinal and transverse displacements between rows. After that, installation of embedded parts in the walls of the foundation 1, which combine the reinforcement and concretes them and the heads of the vertical elements with the formation of the horizontal plate 6, is made. 4 Il. h cc fc bi sj fc O FIG. /

Description

The invention relates to the construction and relates to methods of protecting buildings and structures from the shear deformations of the soil in the conditions of tunneling of the metro of small paving and workings in dense urban buildings.

The purpose of the invention is to increase the reliability of protection of buildings when tunnels pass through them.

Figure 1 shows the building, the structure protected from the shear deformations of the soil by the described method: figure 2 - section AA, figure 1: figure 3 - node I in figure 2; figure 4 - node II fig.Z.

The method is carried out as follows.

Under the foundation 1 of the building, vertical elements 2 of variable length are installed with a deepening below the shear plane 3. At the same time, vertical elements 2 are installed before tunneling with their heads located above the ground surface, resulting in longitudinal and transverse intersecting rows. The holes 4 are punched in the walls of the foundation and the embedded parts 5 are fixed in them by concreting. Then the reinforcement of the plate 6 is laid, combined with the outlets of the embedded parts and they are concreted together with the ends of the vertical elements 2. As a result, the horizontal plate 6 is left with injection holes 7 for pumping the solution into the ground. The injection of sand-cement mortar before tunneling is carried out under horizontal plate 6, and after penetration, the ground is fixed in the descent zone

tunnel shield 7 with lining 8.

The longitudinal and transverse intersecting rows of vertical elements 2 form closed stands, so that in most of the deformation zone there is no decrease in the bearing capacity of the soil inside the stands when tunneling or tunneling under the building. The construction of a horizontal slab allows the load to be transferred from the foundation of the building to the undisturbed soil outside the footing area of the foundation.

The method ensures the safety of buildings and structures when tunnels and openings are drilled under them, increases the safety of mining operations.

Claims (1)

Invention Formula The method of protecting buildings and structures from shear deformations of the soil, including installation of vertical elements buried beneath the shear plane under the building foundation, characterized in that, in order to increase the reliability of protection of buildings when tunneling under them, vertical elements are installed before tunneling with their heads above the ground surface close to each other with the formation of longitudinal and transverse intersecting rows between them, after which they are installed in the walls of the foundation mortgages etaley that combined reinforcement and concreted their end walls and vertical elements to form a horizontal plate, the transition is carried out tunneling injection of sand and grout under the slab, and after soil penetration is fastened injection solution in the shield tunneling gathering zone lining. ./ 2 / 7 // 7/7 // Fig.z / //// FIG L