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砂土液化问题是地基处理中所面临的重要问题之一,已引起工程界的普遍重视。在众多抗液化措施中,预制桩是一种常见的方法,但目前很少有工程会利用预制桩挤土效应的有利影响来消除地基土液化现象,大部分都是采用加大桩长、桩径来提高单桩承载力以达到处理地基土液化的目的。本文对采用预制桩的工程实例进行了分析,证明了在天津软土地区液化土层较厚的情况下,利用预制桩挤土效应的有利影响,不但能消除地基土液化影响,而且液化土层的侧摩阻力无需折减,从而提高了单桩承载力,布桩数减少,节省了投资,对环境污染也降到了最低。
Sand liquefaction is one of the important problems in foundation treatment, which has aroused widespread attention in engineering field. Precast piles are a common method in many anti-liquefaction measures. However, few projects at present use the beneficial effects of precast piles to eliminate the liquefaction of foundation soil. Most of them use the method of increasing pile length, Diameter to improve the bearing capacity of single pile in order to achieve the purpose of liquefying foundation soil. This paper analyzes the engineering example of precast piles and proves that under the condition of thick liquefied soil in soft soil area of Tianjin, the beneficial effect of precast pile compaction effect can not only eliminate the liquefaction of foundation soil, Side friction resistance without reduction, thereby enhancing the single pile bearing capacity, reducing the number of piles, saving investment, environmental pollution also dropped to a minimum.