地基加固的水泥土搅拌桩深层施工参数变化规律研究

Study on the variation law of cement-soil mixing pile reinforced with deep construction parameters

在地基的加固处理工作中深层搅拌法被广泛的应用,但是关于深层搅拌水泥土搅拌桩的研究甚少。故面对这个现状,本文对地基加固深层搅拌水泥土搅拌桩强度进行了一系列的变化规律研究实验。研究数据显示,在地基有机质含量不高的中性土质中,水泥土的强度固化影响很小;在室内实验室中的实验数据表明在百分之十二的水泥掺量下,可以达到在28 d无侧限下抗压强度不低于2 MPa;在施工现场用于实验的取芯结果显示,整个试桩样芯呈现自上到下的强度逐级减弱的形式。

The deep mixing method is widely used in the reinforcement and treatment of foundations,but there is little research on deep mixing cement-soil mixing piles.Therefore,in the face of this current situation,this article car⁃ried out a series of experimental studies on the strength changes of deep mixing cement-soil mixing piles for foundation reinforcement.Research data showed that in neutral soil with low organic matter content in the foundation,the strength solidification effect of cementitious soil was very small.The experimental data in the indoor laboratory showed that at a cement content of 12%,the compressive strength could be achieved to be no less than 2 Mpa at 28 days without lateral confinement.The core sampling results used for experiments at the construction site showed that the entire test pile core showed a gradually decreasing strength from strength to strength.