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采用振冲碎石桩改良软粘土地基,近年来得到了越来越广泛的应用,但这类复合地基的承载力和变形计算目前还不够成熟,若全靠大型载荷试验来确定,则由于人力、物力和时间的限制而影响工程进度,为此我们参照国内外资料,并通过工程实践,采用较轻便的原位测试技术与载荷试验相结合的方法,不断积累资料和经验,以期逐渐用前者代替后者来估算碎石桩—软粘土复合地基的承载力及沉降,现予简要介绍如下。
The use of vibro-replacement and gravel piles to improve the soft clay foundation has been more and more widely used in recent years. However, the calculation of the bearing capacity and deformation of this kind of composite foundation is not mature enough. If it is determined by a large-scale load test, due to manpower, Material and time constraints affect the progress of the project. For this purpose, we refer to domestic and foreign data, and through engineering practice, adopt a combination of lighter in-situ testing technology and load testing to continuously accumulate information and experience in order to gradually replace the former with the former. The latter to estimate the bearing capacity and settlement of gravel pile-soft clay composite foundation is briefly described below.