清摩阻双护筒在超长试桩中的应用

发布时间：2018-04-21 17:10

本文选题：高层建筑 + 桩基础　；参考：《施工技术》2017年21期

【摘要】：工程桩设计前,需通过试验桩检测得到准确的单桩竖向抗压承载力、轴力等数据,为设计提供可靠参数。为加快试桩进度,在土方开挖前进行试桩。针对地质条件差、地下水丰富的软土地区,试桩过程中采用清摩阻双护筒,其主要原理是隔离非有效桩长部分的土体,消除其周边土体摩阻力对试验的影响。结合昆明景成大厦项目试桩工程实例,详细介绍了清摩阻双护筒的原理、加工、安装以及试验中的监测情况。通过对试验测试结果的分析,总结清摩阻双护筒的使用特性。
[Abstract]:Before the design of engineering pile, it is necessary to obtain accurate data of vertical compressive bearing capacity and axial force of single pile by testing pile, so as to provide reliable parameters for design. In order to accelerate the progress of pile test, the pile test is carried out before earthwork excavation. Aiming at the soft soil area with poor geological conditions and abundant groundwater, the main principle of the double retaining tube used in the pile test is to isolate the soil of the long part of the non-effective pile and to eliminate the influence of the frictional resistance of the surrounding soil on the test. The principle, processing, installation and monitoring of the anti-friction double retaining tube are introduced in detail with the example of test pile engineering in Kunming Jingcheng Mansion Project. Based on the analysis of the test results, the application characteristics of the antifriction double guard are summarized.
【作者单位】：中国建筑第二工程局有限公司;
【分类号】：TU753.3

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