Experimental Study On Static And Dynamic Characteristics Of Subsoil Of A Coastal Nuclear Power Plant

There are a lot of soft clay layers in the coastal areas of southeastern China.For coastal foundation soil engineering,these soils are poor in properties,such as high compressibility,low shear strength,low permeability,high water content,Structural.With the rapid economic development stage,a large number of structures,such as large ports,large wharves,power stations and some common civil and industrial buildings,have been constructed and will be built in these areas.The safety and stability of the structure have put forward a lot of new research directions for geotechnical engineering and geotechnical engineering.So far,many scholars have done some research on the analysis of coastal soil,but due to regional differences and different research directions and focus,it is difficult to conduct systematic classification and in-depth study.This paper studies and analyzes the whole soils,sandy clays,silty clays,silt and so on in the coastal foundation soils in the Zhangzhou area of southeast coastal areas and relying on the marine engineering of the actual engineering projects.The static,dynamic and residual deformation of the above four types of coastal soils were studied by TSZ-3 test strain controlled three axis instrument,DSC2000 multifunctional triaxial test system manufactured by VJ tech Company and GDS resonant column test system.The research contents of this paper include:Based on the Duncan-Chang model,the stress-strain curves of coastal soils under different confining pressures are studied by the indoor static triaxial test,and the modulus coefficients Kcu,Kcd,n are studied.The results show that Kcu and Kcd,n and the correlation between the coefficients;The relationship between dynamic stress ratio and failure time of four typical soil samples,and the influence of consolidation ratio and confining pressure on them are analyzed.The effects of confining pressure,The dynamic range of soil dynamic strength of four kinds of soil samples is given,and the proportional relation between static and dynamic strength parameters(?)and(?)d is obtained;The relationship between the shear modulus and the dynamic shear strain and damping ratio and the dynamic shear strain of the four kinds of soils under the condition of the dynamic test.The normalized dynamic shear modulus Gd/Gmax and the damping ratio are given.Dynamic shear strain relationship and the recommended values,and compared with other scholars;Based on the residual deformation model of Shenzhujiang and the modified Shenzhujiang model,the residual deformation characteristics of four kinds of coastal soils were studied,and the effects of confining pressure and consolidation ratio on residual deformation and residual shear strain were analyzed.The parameters of the residual deformation test of are compared,and the parameters of the two models are compared.