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本文研究砂井地基的设计理论与计算方法。文中假设在砂井地基中固结度的分布是均匀的。在考虑到了孔隙水压力存在的条件下,提出了塑性区最大深度的公式,并以塑性区的极限深度作为控制条件提出了承载量的会式与加荷的最小历时的计算方法。通过各种不同的增荷方式所需要的加荷历时的比较,提出了最有利的增荷方式。最后用本文提出的理论与计算方法对若干实际工程进行了验算,证明应用本文提出的方法计算加荷的需要历时一般较实际工程所用的为短。本文的提出希望对目前主要凭经验判断的砂井地基的设计方法所存在的缺陷能够有所弥补。
This paper studies the design theory and calculation methods of sand drain foundation. It is assumed that the distribution of the degree of consolidation in the sand well foundation is uniform. Considering the existence of pore water pressure, the formula for the maximum depth of the plastic zone is proposed, and the calculation method of the minimum load duration and the loading duration is proposed by using the limit depth of the plastic zone as a control condition. Through the comparison of the duration of the loading required by various different load-increase methods, the most favorable way to increase the load was proposed. Finally, some practical projects are verified by the theory and calculation method proposed in this paper. It is proved that the duration of the calculation of the loading using the method proposed in this paper is generally shorter than that used in the actual project. This article hopes to make up for the defects existing in the design methods of sand well foundations currently judged by experience.