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Excavation structure and excavation method of large-span dome in underground nuclear power plant nuclear reactor cavern

A nuclear reactor, long-span technology, applied in earth-moving drilling, mining equipment, tunnels, etc., can solve the problems of loss of quality control, improper excavation process, increased investment, etc., to reduce the stress level and deformation level of surrounding rock, and improve construction. Efficiency and construction safety, the effect of reducing the excavation span

Active Publication Date: 2017-03-08
CHANGJIANG SURVEY PLANNING DESIGN & RES
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  • Summary
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Problems solved by technology

[0005] If the excavation process of the super-long-span dome of the underground nuclear reactor cavern is improper, it is easy to cause delays in the construction period, loss of quality control, increased investment, and even safety accidents in severe cases

Method used

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  • Excavation structure and excavation method of large-span dome in underground nuclear power plant nuclear reactor cavern
  • Excavation structure and excavation method of large-span dome in underground nuclear power plant nuclear reactor cavern

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] The size of the dome to be excavated in this embodiment is 48.4m in diameter and 13.4m in height; in view of the characteristics of the super large diameter of the dome, starting from converting the large diameter dome into a smaller construction space, in order to adapt to the excavation of the super long span dome .

[0020] refer to figure 1 and figure 2 In this embodiment, a large-span dome excavation structure for an underground nuclear power plant nuclear reactor cavern includes a plurality of rock walls 2 arranged inside the dome and surrounding the inside of the dome to form a plurality of closed excavation spaces. The rock walls 2 are arc-shaped The rock surface 5 of the dome outline extends vertically to the horizontal plane where the arch foot 6 of the dome outline is located. There is an interval between the rock...

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Abstract

The invention discloses an excavation structure and an excavation method for a large-span dome in a cavern of an underground nuclear power plant nuclear reactor. A plurality of rock walls with intervals are reserved inside the dome, and the rock walls enclose the inside of the dome to form a plurality of closed construction spaces. Excavation construction in each smaller construction space can temporarily reduce the excavation span, and can reduce the stress level and deformation level of the surrounding rock during the construction process; Interference is small, which can improve construction efficiency and construction safety.

Description

technical field [0001] The invention relates to the technical field of nuclear power engineering, in particular to an excavation structure and an excavation method for a large-span dome in an underground nuclear power plant nuclear reactor cavern during the development and construction of the nuclear power plant. Background technique [0002] In my country's "Twelfth Five-Year Plan" energy plan, it is proposed to accelerate the construction of nuclear power. Under the influence of the Fukushima nuclear accident in Japan, the nuclear power industry, which had just emerged from the shadow of Chernobyl, fell into a trough again. The state's examination and approval of nuclear power projects is more stringent and prudent, and the safety requirements for nuclear power plants are higher. Therefore, a new type of underground nuclear power plant that puts all or part of the nuclear island underground will provide a new way for the development of nuclear power. [0003] The caverns...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D9/14
Inventor 杨启贵张治军苏利军刘百兴刘立新李锋张春燕熊新宇赵峰朱学贤
Owner CHANGJIANG SURVEY PLANNING DESIGN & RES
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