Nuclear power station shielding wall SC structure module hoisting method

Abstract

The invention discloses a nuclear power station shielding wall SC structure module hoisting method. The nuclear power station shielding wall SC structure module hoisting method comprises the followingsteps that a SC structure module is divided into four parts, hoisting point positions of the four parts are separately calculated; a hoisting mechanism is mounted at the four hoisting points; a first-stage balance beam position is calculated according to the gravity center position of the module, a second-stage balance beam position is calculated according to the first-stage balance beam positionand the hoisting point positions; a first-stage balance beam, a second-stage balance beam and the hoisting mechanism are sequentially connected from top to bottom through a sling, and the first-stagebalance beam is connected with a crane hook through the sling. According to the nuclear power station shielding wall SC structure module hoisting method, hoisting is carried out by adopting the two-stage balance beam, it is guaranteed that a steel wire rope and the module are vertically hoisted, the module is not subjected to horizontal component force, deformation of the module in the hoisting process is effectively controlled; collision between the sling and a CV structure adjacent to the SC structure is avoided; and the hoisting frequency is effectively reduced, the hoisting quality safetyrisk is reduced, the construction cost is reduced, and the module hoisting quality can be effectively ensured.

Description

technical field [0001] The invention belongs to the technical field of nuclear power construction, and in particular relates to a method for hoisting an SC structure module of a shielding wall of a nuclear power plant. Background technique [0002] The shielded building of the CAP1400 nuclear power plant is one of the most important structures for nuclear power plants to resist internal and external accidents. It has the main functions of radiation shielding, missile protection, passive cooling, and resistance to tornadoes and earthquakes. capacity, the steel plate concrete structure adopted for the first time in the design, that is, the SC structural module, the SC structural module has the characteristics of small overall rigidity, high local rigidity, and easy deformation when hoisting; at the same time, the installation accuracy of the SC structural module is high: the installation tolerance of radius and elevation is 3mm , high-altitude correction is difficult, quality ...

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Problems solved by technology

[0002] The shielded building of the CAP1400 nuclear power plant is one of the most important structures for nuclear power plants to resist internal and external accidents. It has the main functions of radiation shielding, missile protection, passive cooling, and resistance to tornadoes and earthquakes. capacity, the steel plate concrete structure adopted for the first time in the design, that is, the SC structural module, the SC structural module has the characteristics of small overall rigidity, high local rigidity, and easy deformation when hoisting; at the same time, the installation accuracy of the SC structural module is high: the installation tolerance of radius and elevation is 3mm , high-altitude correction is difficult, quality control is difficult, and the number of SC structure sub-modules is large. If the traditional unit module hoisting method is used, the number of hoisting times is large, the risk of hoisting quality and safety is high, the cost is high, and the construction period is long.

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