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近年来,各地陆续发现了不少的膨胀土地基事故,由于地基土的反复胀缩变形,导致了建筑物的开裂破坏。这就给勘察设计工作提出了如何认识膨胀士及如何防止膨胀土地基反复胀缩变形而导致建筑物变形开裂破坏的课题。两年来,各地选择了具有代表性的新老建筑物近百余幢作了典型的调查研究工作,查明了建筑物下的地质剖面,测定了
In recent years, a number of accidents have been discovered in various areas of the expansive foundation. As a result of the repeated expansion and contraction of the foundation soil, cracking of buildings has been caused. This gave the survey and design work a question on how to recognize the expansionists and how to prevent the deformation and cracking of the building due to the expansion and contraction of the expansive foundation. In the past two years, nearly a hundred buildings with representative representative old and new buildings have been selected for typical investigation and research work, and the geological sections under the buildings have been identified and measured.