METHOF FOR ELIMINATION OF EMPTINESS IN POST-COVERED SPACE OF RAILROAD TUNNEL (VERSIONS) Russian patent published in 2008 - IPC E02D19/20 E02D31/10 E21D11/38 

FIELD: construction.

SUBSTANCE: invention relates to strengthening of the lower part of the section of the railroad tunnel and may be employed for strengthening of bases of buildings and constructions. Method includes feeding of mortar with filling agents. A shaft is drilled in the lower part of the section of the railroad tunnel above the detected emptiness for feeding of filling material and a second shaft for feeding of consolidating mortar. Feeding device is installed and filling material is supplied through it in the form of balls of waterproof material, density whereof equals or is greater than water density. Balls are compressed by means of a vibrations generator; entrained water is pressed out from the emptiness by balls either through holes in the rock or through the consolidating mortar feeding shaft. Having filled the emptiness with balls, feeding device is taken away and the shaft is sealed, consolidating mortar is supplied into the second shaft and having filled all the emptiness the shaft is sealed. Should there be no water in the emptiness one shaft is drilled in the lower part of the section of the railroad tunnel; where through emptiness are filled with balls compressed by a vibration generator, after that feeding device is taken away and consolidating mortar is supplied through the shaft. Emptiness been filled the shaft is sealed.

EFFECT: cost reduction of elimination of emptiness.

2 cl, 1 dwg