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1 工程概况河南省平顶山水库库区设防烈度为6度,经勘察证实,水库坝基下第二层细砂及下游坝脚外第一层粉质壤土、第二层中砂均属于液化砂层,需要抗液化加固处理。为此,河南省水利勘察设计院提出了采用振冲加固法对该段地基进行加固处理及具体施工技术要求,其原理是通过人工施加的强振及填料,迫使砂土重复液化、土颗粒重新排列并被挤密,达到提高砂土层抗剪强度及抗液化等级。
1 Project Overview Pingdingshan reservoir area in Henan Province fortification intensity of 6 degrees, confirmed by investigation, the reservoir dam second layer of fine sand and the foot of the first layer outside the foot of the second silty loam, the second layer of sand belong to the liquefied sand layer, Need anti-liquefaction reinforcement. To this end, Henan Province Water Conservancy Survey and Design Institute proposed the use of vibration reinforcement method for the reinforcement of the foundation and the specific construction of technical requirements, the principle is through the manual application of strong vibration and the filler, forcing the sand repeated liquefaction, soil particles re- Arrange and be crowded, to improve the sand layer shear strength and anti-liquefaction level.