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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.
07-04-2023 дата публикации

Large-section tunnel construction method

Номер: CN115929327A
Автор: ZHAO AIHUI, JIANG PENG, ZHANG JINCHENG, LI LONGFENG, ZHANG XU, LIU NING, MA JING, LI XIN, ZHANG RUIXIN, SHANG LEI, MA XIANGPENG, CHEN GUOPING, CAO CHAOFENG, LIU MIAOMIAO
Принадлежит:

The invention discloses a large-section tunnel construction method, belongs to the technical field of tunnel construction, aims to solve the problems that primary support of a tunnel is unstable, deformation is easy to generate and the like due to unsymmetrical pressure of the tunnel, overlarge excavation section and disturbance of blasting excavation, and adopts a temporary cross brace and an opposite-pulling anchor rod to balance pressure on two sides, so that the tunnel is uniformly stressed, and tunnel deformation is controlled. A series of safeguard measures are provided for stable and normal use of the tunnel by adopting a reinforced monitoring mode. By means of the method, uneven deformation of the tunnel caused by tunnel bias pressure can be well controlled, clearance convergence and vault settlement can be effectively controlled through monitoring, the normal use function of the device is ensured, and the structural safety of the device is ensured.

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Номер записи: 1
11-11-2009 дата публикации

Glucoside-containing composition, preparation method thereof and use thereof

Номер: CN0101574536A
Автор: CUI WENYAN, WANG ZHONGWEN, MA XIANGPENG, LI RONG, WENYAN CUI, ZHONGWEN WANG, XIANGPENG MA, RONG LI
Принадлежит:

The invention discloses a glucoside-containing composition, a preparation method thereof and use thereof. The composition mainly comprises glucoside, thiourea, modified starch, sodium alginate, sodium thiosulfate, sulfanilic acid, propanetriol, ammonium molybdate, malic acid and tea polyphenol. The composition can be used in gas and liquid phases to reduce low molecular aldehydes and ketones and used in finishing and decorating materials to remove formaldehyde in both free and absorption states and accelerate the release of deep formaldehyde in a fixed state to capture the formaldehyde and can react instantaneously to form a hydroxy salt without secondary pollution. When used in cigarette filament bundle filter rods, the composition can improve mouth feel during smoking, retain the original fragrance of cigarettes, reduce various harmful ingredients in smoke, remove the special hot taste and burning feel of polypropylene fibers and improve the quality of the smoke to the degree of that ...

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Номер записи: 2
28-04-2023 дата публикации

Large-section tunnel lining block construction supporting method

Номер: CN116025364A
Автор: ZHAO AIHUI, WANG JIN, JIANG PENG, ZHANG JINCHENG, LI LONGFENG, ZHANG XU, LIU NING, MA JING, LI XIN, ZHANG RUIXIN, SHANG LEI, MA XIANGPENG, CHEN GUOPING, CAO CHAOFENG, LIU MIAOMIAO
Принадлежит:

The invention aims to provide a large-section tunnel lining block construction supporting method, which belongs to the technical field of tunnel supporting systems, and is characterized in that on the basis of 9-part excavation of a tunnel excavation construction double-side-wall pilot tunnel method, a lining block construction structure is combined for supporting, and multiple supports are replaced in the construction process; and the condition that the tunnel surrounding rock is always supported in the excavation process is ensured. Under complex or weak geological conditions, all construction procedures are carried out under the condition that supports exist or support replacement exists, disturbance to surrounding rocks is small, and stress release of the surrounding rocks is little; according to the construction method, excavation supporting and secondary lining construction procedures can be carried out in a joined mode, meanwhile, in space, a construction channel can be reserved ...

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Номер записи: 3