旋喷搅拌加劲锚桩对软土基坑变形控制效果的分析
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（上海强劲地基工程股份有限公司，上海 200233）[摘要] 旋喷搅拌加劲锚桩是将大直径水泥土桩体与传统锚索相结合而成的一种新型工艺，主要用于淤泥土、黏性土、砂性土中的基坑支护。该工艺克服了传统锚索直径小、锚固力低的缺点，代之以大直径的水泥土搅拌桩体，从而使锚索的承载力大大提高，基坑位移控制效果更加理想。结合某工程实例，突出介绍旋喷搅拌加劲锚桩的施工工艺特点以及基坑变形控制效果，以期为工程应用提供借鉴作用。[关键词] 基坑工程; 旋喷搅拌加劲锚桩; 大直径锚索; 传统锚索; 蠕变; 群锚效应中图分类号：TU473.1+2 文献标识码：A 文章编号：1002-848X(2013)S2-0616-05作者简介:毕平均，硕士研究生，工程师，注册土木工程师（岩土），Email:cybersky2046@126.com。Analysis of deformation controlling effect by jet mixing anchor in foundation pit in soft soilBi Pingjun , Liu Quanlin（QiangJin Foundation Engineering Co., Ltd., Shanghai 200233, China）Abstract: The jet mixing anchor , a new technology combines large-diameter cement-soil pile with traditional anchor, is usually applied in the foundation excavation in silt, clay, sand etc. Being short on diameter and anchorage capacity, the traditional anchor is replaced by large-diameter jet mixing anchor, which enhanced the anchorage capacity and the displacement controlling effect. Combined an engineering case, the characteristic and application effect of the jet mixing anchor is to be analyzed in this essay, then to provide a certain reference for engineering application.Keywords: foundation pit; jet mixing anchor; large-diameter anchor; traditional anchor; creep; anchor group effect
