某化工厂电解锌车间建成投产仅半年就发生了明显的基础下沉,造成建筑物和工艺构筑物倾斜,车间地面开裂破坏,最后被迫停产。虽然此前也对场区作过勘察评价,并认为作为电解锌车间持力层的红黏土呈坚硬—硬塑状,具中等偏低压缩性,是良好地基土,但忽视了生产过程中化工溶液下渗对地基土的影响。通过调查,本文揭示了该厂生产的硫酸锌溶液下渗后对红黏土地基造成了污染,改变了土体原生结构性状和化学成分而使其软化的机制,并提出了在今后类似场区进行勘察工作的要点。 Electrolysis zinc plant in a chemical plant was put into operation only half a year on the basis of the apparent subsidence, resulting in the tilt of buildings and structures, the workshop floor cracking damage, and finally forced to stop production. Although the site area has also been surveyed and evaluated, and that as a holding layer of zinc electrolysis workshop hard layer - hard plastic shape, with a moderate low compressibility, is a good foundation, but neglected the production process chemical solution Influence of infiltration on foundation soil. The investigation revealed that the zinc sulfate solution produced by the plant infiltrated the red clay so that it could pollute the ground and change the structure and chemical composition of the soil to make it soften. The main points of investigation.