论文部分内容阅读
结合山西典型液化场地,为提高场地的抗液化性能,选用双元复合地基和预应力管桩加固两种地基处理方式,通过测定地基处理前后同一孔的标准贯入锤击数,与计算出的标准贯入锤击数临界值进行比较,分析处理前后场地的可液化性能。结果表明,采用双元复合地基和预应力管桩加固地基都可以提高地基土的抗液化性能,双元复合地基比预应力管桩加固效果更佳。同时,结合相关室内试验,基于本工程指出:当桩间距采用3D(D为桩直径)时,能比较有效地提高液化土的抗液化强度。为液化土地基处理方案的选择提供参考与指导。
Combining with the typical liquefaction site in Shanxi Province, in order to improve liquefaction resistance of the site, dual foundation and prestressed pipe pile are used to reinforce both foundation treatments. By measuring the standard penetration hammer number of the same hole before and after foundation treatment, Standard penetration hammering the number of critical compared to analyze liquefaction performance before and after treatment. The results show that both the composite foundation and the prestressed pipe pile can improve the liquefaction resistance of the foundation soil. The dual composite foundation is better than the prestressed pipe pile. At the same time, combined with the related indoor tests, based on the project, it is pointed out that the liquefaction resistance of liquefied soil can be effectively improved when the pile spacing is 3D (D is the diameter of the pile). It provides reference and guidance for the choice of liquefied soil foundation treatment scheme.