TUBING RING FOR TUNNEL LININGS OF DIAMETER 10.5 TO 15.5 METERS FOR UNDERGROUND STRUCTURES
The invention is aimed at increasing the bearing capacity and rigidity of structure as a whole by ensuring equal strength of the tubing ring, the possibility of cross-tying the tubing rings and increasing the rigidity of joints of tubing pieces in the ring. In the tubing ring, the normal tubing piec...
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Sprache: | eng ; rus |
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Zusammenfassung: | The invention is aimed at increasing the bearing capacity and rigidity of structure as a whole by ensuring equal strength of the tubing ring, the possibility of cross-tying the tubing rings and increasing the rigidity of joints of tubing pieces in the ring. In the tubing ring, the normal tubing pieces located in the lower part of lining are made of lightweight structure by reducing the thickness of their back and sides, and all tubing pieces, except the key one, have internal radial stiffening ribs in one or more rows, that enables to provide a given bearing capacity and stiffness of the tubing with minimizing its weight. At the same time, rigging holes are made in the walls of the stiffeners to mount the rings and fasten the internal elements of the structure, and each tubing has a rounding on the outer part of its back-to-side transition to prevent corner chipping when the ring is deformed under load from rock pressure. In addition, the center of each normal, normal lightweight and adjacent tubing has a cylindrical bulb with a grouting hole with thread, to facilitate mounting of the nozzle of mud hose to inject the mortar into the space behind lining, with its subsequent plugging by a threaded grouting plug with its waterproofing gasket. The bolts fastening the tubing pieces in the ring and the rings are installed in holes made in shaped bosses formed on the inner side of the annular and radial sides of tubing, and an embossed groove is made along the contour of the latter for waterproofing purposes.
Изобретение направлено на увеличение несущей способности и жесткости сооружения, в целом, путем обеспечения равнопрочности тюбингового кольца, возможности перевязки тюбинговых колец и увеличения жесткости стыков тюбингов в кольце. В тюбинговом кольце нормальные тюбинги, расположенные в нижней части обделки, выполнены облегченной конструкции за счет уменьшения толщины их спинки и бортов, и во всех тюбингах, кроме ключевого, выполнены внутренние радиальные ребра жесткости в количестве одного и более рядов с возможностью обеспечения заданной несущей способности и жесткости тюбинга при минимизации его веса. При этом в стенках ребер жесткости образованы такелажные отверстия для монтажа колец и крепления элементов внутреннего обустройства сооружения, а в каждом тюбинге на внешней части сопряжения спинки с бортами выполнено скругление для обеспечения предотвращения сколов углов при деформации кольца под нагрузкой от горного давления. Кроме того, по центру каждого н |
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