SU1326734A1 - Lining of underground structure vault - Google Patents

Abstract

This invention relates to the construction of underground structures. The purpose of the invention is to increase the reliability of the structure at horizontal tectonic stresses. The lining of the vault includes concrete or reinforced concrete vaulted blocks (SB) 1 and castle blocks (PZ) 2. Moreover, SB 1 has a constant or variable thickness with curvature of the axis defined by radius R. From the main part of SB 1 of the lining ZB 2 is separated by inclined expansion joints 3, filled with a thin layer of antifriction material. The central angle "between the seams 3 is greater than the angle os between the radii of curvature of the axis of the SB 1 at section 315 2. Between the top of ZB 2 and the roof 4 there is a cavity filled with a deformable material 6. When a normal compressive force of ZB 2 is reached in SB 1, allowing the SB 1 to go overvoltage under the action of horizontal tectonic forces. 2 Il. F (L of Fig. 2

Description

The invention relates to the construction of underground structures located in soil massifs subject to horizontal tectonic forces.

The purpose of the invention is to increase the reliability of the structure at horizontal tectonic stresses.

FIG. 1 shows the vault, cross section; in fig. 2 — node I in FIG. one.

The vault block 1 is made of monolithic concrete or reinforced concrete grade 200-300 and has a constant or variable thickness with the curvature of the vault axis characterized by a radius R. The locking unit 2 is made of reinforced concrete higher grade 300-400 and is separated from the main part of the arch blocks 1 trimming inclined expansion joints 3, filled with a thin layer of antifriction material, such as bitumen. The central angle “, formed by the seams 3 of the locking block 2 is larger than the central angle cx formed by the radii of curvature of the axis of the vault in the section of the locking block. Between the top of the castle block 2 and the roof 4 of the excavation 5 a cavity is formed, filled with strongly deformable material 6, for example slag wool.

The dimensions of the locking block, the angle of inclination of the expansion joints, and the deformability of the pliable material in the supra-chamber cavity are determined by calculation or on a model, for example, from equivalent materials.

After concreting the lining and set

concrete strength under the action of horizon. total tectonic forces in the arch sections

Increases occur, and the pressure is compressed with time. At the same time, due to the presence of the locking block 2, separated from the lining by sliding deformation seams 3 with a central angle o (,) ({, when the calculated normal compressive force is reached in the vault, the locking block will mix (squeeze) upwards, allowing the arch to move away from overvoltage horizontal tectonic forces. When extruding the locking block upward, the latter squeezes the deformable material 6, which reinforces the overhead section of the roof of the excavation.

After completion of excavation, production 5

5, an equilibrium state is created around it in the soil massif, the arch deformation is stopped. The code begins to work in the project hard mode.

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Claims (1)

Invention Formula The lining of the vault of the underground structure, including the arch and castle blocks, is different from that. In order to increase the reliability of the structure during horizontal tectonic stresses, the castle lining block has deformation joints made obliquely between the arch and castle blocks and filled with antifriction material , while the upper part of the locking block is made of a deformable material, and the angle between the seams of the locking block is greater than the angles between the radii of its curvature.