Static Status and Treatment Solution Study on Sub-Grade with Non-Homogeneous Constituents in Local Area of Nuclear Island Buildings

Since there are some weathered accidental inclusion in the sub-grade of a nuclear project in China,an integrative model including the sub-grade,foundation and super-structure were generated using the finite element software ANSYS to assess the influence of these weak rocks.Based on the geological data,the non-homogeneous rock conditions were accurately simulated and the sensitivity analyses to the parameters of weathered accidental inclusion were also carried out.Then the non-homogeneous settlement of the sub-grade rock,the internal force distribution of the raft and super-structure and the structural reinforced design were analyzed in detail,and the results provided a theoretical basis for obtaining the treatment solution of weak rocks.It demonstrated that the weak rocks in the specified limited scale have slight impact on the static capacity of the sub-grade since the surrounding good rocks can support the loads transmitted from the super-structure.The engineering practice also showed the relevant treatment solution is appropriate.