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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 3. Отображено 3.
25-04-2023 дата публикации

Construction method for in-situ extension of existing highway tunnel and tunnel structure

Номер: CN116006189A
Принадлежит:

The invention relates to a construction method for in-situ extension of an existing highway tunnel and a tunnel structure, belongs to the technical field of tunnel design and construction, and solves the problems of resource waste, high investment and high reconstruction and extension cost of an existing construction method. The construction method mainly comprises the following steps that an existing tunnel arch secondary lining on the expanding excavation side is dismantled; constructing a newly-built tunnel arch forepoling and a newly-built tunnel arch primary support on the expanding excavation side; the secondary lining of the existing tunnel arch wall on the expanding excavation side is dismantled; constructing a newly-built tunnel arch wall advance support and a newly-built tunnel arch wall primary support on the expanding excavation side; constructing a new tunnel inverted arch; and constructing a secondary lining of the newly-built tunnel. According to the method, the site construction ...

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20-06-2023 дата публикации

Tunnel gas-liquid linkage balance pressure-limiting drainage device

Номер: CN116265784A
Принадлежит:

The invention relates to a tunnel gas-liquid linkage balance pressure-limiting drainage device, belongs to the field of tunnel drainage, and solves the problems that a spring type pressure-limiting drainage device in the prior art is low in sensitivity, inconvenient to maintain, difficult to replace and the like. The invention discloses a tunnel gas-liquid linkage balance pressure-limiting drainage device which comprises a rubber ball, a balance rod, a rotating shaft and a first air bag. The rotating shaft is fixedly mounted in the inspection well; a first longitudinal drain pipe and a second longitudinal drain pipe are arranged in the inspection well; a balance rod is rotationally mounted on the rotating shaft; a rubber ball is arranged at one end of the balance rod and used for blocking the first longitudinal drainage pipe. The other end of the balance rod is fixedly connected with a piston in the first air bag. The tunnel gas-liquid linkage balance pressure-limiting drainage device is ...

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20-06-2023 дата публикации

Shed tunnel structure system suitable for road section prone to landslide and construction method of shed tunnel structure system

Номер: CN116265679A
Принадлежит:

The invention relates to a shed tunnel structure system suitable for a road section prone to landslide and a construction method of the shed tunnel structure system, belongs to the technical field of shed tunnel supporting and solves the problems that in the shed tunnel construction process, landslide is prone to occurring, and the construction efficiency is low. The anti-slide piles are constructed at the temporary shortcut, the longitudinal beams are poured between the adjacent anti-slide piles for connection, and longitudinal connection between the adjacent anti-slide piles is completed; foundation trenches are sequentially excavated on the opposite side of the temporary shortcut in a segmented mode, and reinforced concrete pouring construction is conducted in the foundation trenches to form strip-shaped foundations; the prefabricated inclined columns and the prefabricated cross beams are transported to a construction site, and assembly type splicing installation is carried out; excavation ...

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