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选择广东佛山地区花岗片麻岩残积土层和粉砂质泥岩残积土层,采用法国梅纳旁压仪进行原位测试,根据试验结果确定了表征残积土的水平应力、强度、抗变形能力和地基土承载力等指标,研究这些指标随深度的变化规律,并据此确定桩基持力层深度。研究表明,残积土的力学参数普遍受风化程度影响,深度越深,风化程度越弱,土的强度越高,抗变形能力越强。这为该地区残积土工程使用的各项参数提供了参考,对其它地区类似残积土也具有借鉴意义。
The residual soil of granitic gneiss and silty mudstone in Foshan area of Guangdong Province were selected for in-situ testing by French Mena pressure gauge, and the horizontal stress, strength and deformation resistance of residual soil were determined according to the test results And bearing capacity of foundation soil and other indicators to study the variation of these indicators with depth, and to determine the depth of pile holding layer. The results show that the mechanical parameters of residual soil are generally affected by the degree of weathering. The deeper the depth, the weaker the weathering degree. The higher the soil strength, the stronger the anti-deformation ability. This provides a reference for the parameters of the residual soil engineering in this area, and also can be used for reference to similar residual soil in other areas.