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软弱地基系指主要由淤泥、淤泥质土、充填土或其他高压缩性土层构成的地基。如果地基承载力不足,就可以判定为软弱地基,就必须采取措施对软弱地基进行处理。在建筑地基的局部范围内有高压缩性土层时,应按局部软弱土层考虑。勘察时,应查明软弱土层的均匀性、组成、分布范围和土质情况,根据拟采用的地基处理方法提供相应参数。充填土尚应了解排水固结条件。杂填土应查明堆积历史,明确自重下稳定性、湿陷性等基本因素。
Weak ground refers to a foundation consisting primarily of silt, silty soil, fill soil, or other highly compressible soil layers. If the foundation bearing capacity is insufficient, it can be determined as a soft foundation, and measures must be taken to deal with the soft foundation. When there is a high compressive soil layer in a local area of a building foundation, the local soft soil layer should be considered. During the investigation, the uniformity, composition, distribution range, and soil conditions of the soft soil layer should be identified, and corresponding parameters should be provided according to the foundation treatment method to be adopted. Filling the soil should also understand the drainage consolidation conditions. Miscellaneous fill should find out the history of accumulation and define basic factors such as stability and collapsibility under gravity.