Three-dimensional multi-defense-line double-raft damping structure suitable for nuclear power stations in soft soil areas

A technology of nuclear power plants and rafts, which is applied in the foundation field of nuclear power plants, can solve problems such as structural damage and collapse, and achieve the effects of dissipating seismic energy, reducing seismic response, and reducing bending moment

Inactive Publication Date: 2020-01-24
SOUTHEAST UNIV +1
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Problems solved by technology

According to the seismic data at home and abroad, the vertical action component of the earthquake may exceed the horizonta

Method used

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  • Three-dimensional multi-defense-line double-raft damping structure suitable for nuclear power stations in soft soil areas
  • Three-dimensional multi-defense-line double-raft damping structure suitable for nuclear power stations in soft soil areas
  • Three-dimensional multi-defense-line double-raft damping structure suitable for nuclear power stations in soft soil areas

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Embodiment Construction

[0026] A kind of three-dimensional multi-defense line double-raft seismic isolation structure suitable for nuclear power plants in soft soil areas in this embodiment, such as figure 1 As shown, the pile 1 is embedded in the gravel isolation cushion 0.5d (d represents the diameter of the pile). 8-10cm cobblestone is used for gravel shock-isolation cushion layer 2, and the thickness of the cushion layer is 1-2d. The lower raft 3 and the pad contact surface are pasted with waterproof coiled material and anti-radiation material. An underground shear wall 4 is arranged around the lower raft 3, and an upper raft 5 is installed in the middle of the lower raft 3 through a group of three-dimensional seismic isolation devices A and eddy current isolation devices B arranged at intervals. The upper raft 5 is provided with a nuclear power plant double-layer containment structure and a podium structure 8, the nuclear power plant double-layer containment structure is located in the middle o...

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Abstract

The invention discloses a three-dimensional multi-defense-line double-raft damping structure suitable for nuclear power stations in soft soil areas. The structure comprises piles, gravel damping cushion layers arranged on the upper surfaces of the piles, lower rafts arranged on the gravel damping cushion layers; underground shear walls are arranged around the lower rafts; upper rafts are mounted in middles of the lower rafts through a set of three-dimensional damping devices and eddy current damping devices arranged at intervals; the upper rafts are provided with nuclear power station double-layer safety shell structures and annex structures; the nuclear power station double-layer safety shell structures are positioned in middles of the annex structures; the eddy current damping devices are arranged between the underground shear walls and the side walls of the annex structures; and upper cover plates are arranged between the tops of the underground shear walls and the annex structures.The structure is provided with three damping defense lines: the damping gravel cushion layers, three-way damping layers between double rafts, and inner and outer safety shell damping layers, so thatthe pile top stress can be improved, the transfer of earthquake force to upper structures is reduced, and the transfer of upper structure inertia force to foundations is reduced.

Description

Technical field: [0001] The invention belongs to the technical field of nuclear power plant foundations, and relates to a three-dimensional multi-defense double-raft shock-isolation structure suitable for nuclear power plants in soft soil areas, specifically a combination of double-layer rafts, a new three-dimensional shock-isolation system, and a new composite shock-isolation pile foundation . Background technique: [0002] Based on the clean and low-carbon characteristics of nuclear power energy, it has been favored by more and more countries. The safety of nuclear power plants is the top priority in the construction of nuclear power plants. The latest generation of nuclear power plants adopts a double-layer containment structure. After investigation, the important buildings (structures) related to nuclear safety in my country's nuclear power plants all use raft foundations, with hard rock as the bearing layer. The shear wave velocity of the rock mass is relatively high, ...

Claims

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Application Information

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IPC IPC(8): E02D31/08E02D27/34E02D27/01
CPCE02D27/01E02D27/34E02D31/08
Inventor 杨阳龚维明凡红董占发邹豫皖戴国亮
Owner SOUTHEAST UNIV
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