引江济淮试验工程河道边坡锚杆检测对比试验

发布时间：2018-03-13 17:42

本文选题：膨胀土　切入点：软岩　出处：《水利水电科技进展》2017年06期 　论文类型：期刊论文

【摘要】：依据GB50086—2015《岩土锚杆与喷射混凝土支护技术规范》和SL 377—2007《水利水电工程锚喷支护技术规范》对引江济淮试验工程膨胀土边坡、软岩边坡加固锚杆进行拉拔检测试验。结果表明,锚杆端部位移和检测方法相关,GB法检测的杆体端部位移大于SL法,位移转换系数为0.9~0.95;软岩边坡中锚杆的端部位移量小于弱膨胀土边坡;两种方法用于软岩及弱膨胀土边坡加固锚杆质量检测时,会产生弹性伸长值过大现象,采用杆端位移时间过程评价锚杆质量更具有合理性;SL法、GB法检测到的锚杆轴力线性相关,转换系数为0.9~1.05;采用SL法检测非预应力锚杆具有可行性,通过换算可得到GB法检测数据。
[Abstract]:According to GB50086-2015 (Technical Specification for Rock and soil Anchor and shotcrete support) and SL377-2007 (Technical Specification for Anchorage and shotcrete support for Water Conservancy and Hydropower projects), the tensile test of expansive soil slope and soft rock slope reinforcement of expansive soil slope and soft rock slope is carried out. The results show that, The displacement of the end part of the bolt detected by GB method is larger than that of the SL method, and the displacement conversion coefficient is 0.90.95. The displacement of the end part of the anchor rod in the soft rock slope is smaller than that of the weakly expansive soil slope. When the two methods are used to detect the quality of anchor rod strengthened by soft rock and weakly expansive soil slope, the phenomenon of excessive elastic elongation will occur. It is more reasonable to use the displacement time process at the end of the rod to evaluate the quality of anchor rod, which is more reasonable than that detected by SL method and GB method. The conversion coefficient is 0.9m 1.05. It is feasible to use SL method to detect the unprestressed anchor, and the GB method can be obtained by conversion.
【作者单位】：安徽省投资集团控股有限公司;河海大学岩土力学与堤坝工程教育部重点实验室;河海大学道路与铁道工程研究所;河海大学岩土工程研究所;中铁二十局集团有限公司;
【基金】：国家自然科学基金(41472240,41602352) 中央高校基本科研业务费专项(2015B25514)
【分类号】：TV551.4

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