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1、前言 振冲法是30年代发展起来的软基加固技术,经过不断改进完善,现已成功应用于松散砂基的加固中,近年来我国各地试用情况较好。实践证明砂基经振冲加固,相对密度可达0.75以上,承载力提高1.5倍以上,能有效防止砂基在地震时液化,并具有成本低、工效高和工艺简单等优点。然而在含砾石砂基中用振冲法加固仍缺少经验,为了摸索、探讨振冲法在含砾砂层中的施工工艺及参数,我们用75kW振冲器对安徽六安师专图书馆
1. Preface Vibroflotation method is a soft-base reinforcement technology developed in the 1930s. After continuous improvement and improvement, it has been successfully applied to the reinforcement of loose sand bases. In recent years, trials in various regions of China have been better. Practice has proved that the sand base is vibrated and reinforced, with a relative density of 0.75 or more and a bearing capacity of more than 1.5 times. It can effectively prevent the sand base from liquefying during an earthquake and has the advantages of low cost, high work efficiency, and simple process. However, it is still inexperienced to reinforce by vibroflotation method in gravel-based sandy foundations. In order to explore and discuss the construction process and parameters of vibroflotation method in pebbly sand layers, we used the 75 kW vibrator against Anhui Liu’an Teachers’ College Library.