About the author:

China Nuclear Industry 22nd Construction Co., Ltd., Wuhan, Hubei 430050, China

Abstract:

Based on the Sanmen Nuclear Power Plant Project （ Phase II） in Zhejiang Province andcombined with the characteristics of CAP reactor type, the “ three⁃in⁃one” technology of super⁃long raftfoundation is proposed for the first time. And the temporary support system under CR10 was designed torealize the pre⁃positioning of CR10 integral pouring with the support system as the main body of force.The raft foundation and the outer foundation A⁃layer were poured together, and the central hexagon groovewas cancelled to reduce the stress concentration. The practice shows that this technology can significantlyimprove the project quality, improve the project construction environment, reduce the manpower input,and speed up the construction progress. Meanwhile, the use of wireless measurement devices can ensurethe measurement accuracy. Through the analysis of temperature and strain monitoring data, it is foundthat the “ three⁃in⁃one ” technology can effectively reduce or even eliminate the harmful cracks inconcrete,which further proves that this technology can greatly improve the construction quality ofseamless pouring of mass concrete foundation raft.