CFG桩复合地基承载力检测方法讨论与实例分析

发布时间：2018-03-07 08:07

本文选题：CFG桩　切入点：复合地基承载力　出处：《建筑结构》2016年S2期 　论文类型：期刊论文

【摘要】：CFG桩复合地基技术目前已广泛应用于高层建筑地基处理,但实际工程中CFG桩施工问题频发,故引起对其承载力检测方法的关注,相关规范也伴随工程实践和总结逐渐成熟起来。《建筑地基处理技术规范》(JGJ79—2002)只要求进行复合地基静载荷试验以检测复合土层承载力,《建筑地基处理技术规范》(JGJ 79—2012)增加了复合地基增强体单桩静载荷试验,要求必须将增强体单桩承载力作为检测的一项重要指标。本文中某高层办公楼,在新版规范(2012版)未使用之前,超前进行了复合地基增强体单桩静载荷试验,试验结果的确有不合格增强体单桩,即在所检测的5根单桩中,2根单桩承载力未达到设计要求。为此,讨论了在进行CFG桩复合地基设计时,进行增强体单桩静载荷试验的必要性。
[Abstract]:The technology of CFG pile composite foundation has been widely used in the foundation treatment of high-rise building at present, but the problem of CFG pile construction occurs frequently in practical engineering, so the bearing capacity testing method is paid more attention to. The technical code of building foundation treatment > JGJ79-2002) only requires the static load test of composite foundation to test the bearing capacity of composite soil layer, and the technical code of building foundation treatment > JGJ79-2012). The static load test of single pile reinforced with composite foundation is carried out. The bearing capacity of single pile must be regarded as an important index of testing. In this paper, the static load test of single pile reinforced with composite foundation was carried out before the use of the new edition of the new code (2012) in a high-rise office building. The test results show that there are unqualified reinforced single piles, that is, 2 of the 5 single piles tested do not meet the design requirements. Therefore, the design of CFG pile composite foundation is discussed. The necessity of static load test of reinforced single pile.
【作者单位】：北京建筑大学;北京市建筑设计研究院有限公司;
【分类号】：TU473.1

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