膨胀式自应力灌浆卡箍大尺寸模型的承载性能测试

发布时间：2018-05-25 16:36

  本文选题：膨胀式自应力灌浆卡箍 + 大尺寸模型　； 参考：《中国海洋大学学报(自然科学版)》2017年01期

【摘要】：为了推进膨胀式自应力灌浆卡箍技术的工程应用,本文进行了大尺寸卡箍模型的承载性能测试分析,主要通过内管表面多点的应变测试来分析灌浆环内表面的膨胀压力分布,通过测试螺栓拉力来分析灌浆环外表面的平均膨胀压力,最后利用"推出法"测定卡箍的滑动承载力,并结合膨胀压力分布情况进行分析。试验结果表明:灌浆环内表面膨胀压力在各个断面的分布是一样的,但断面不同位置膨胀压力的分布不均匀。由于灌浆环顶部存在空隙,造成了底部膨胀压力最大,两侧的压力较小,顶部是负压力。由螺栓拉力测试的灌浆环外表面平均膨胀压力理论推导出的内表面膨胀压力可以看出,内表面底部测试的膨胀压力比较符合推导值,侧部膨胀压力则偏小。滑动承载力测试时内管表面应变的数值大小也证实了膨胀压力的不均匀分布情况。另外该类型卡箍可以在灌浆后短时间(3~4d)内形成承载能力。
[Abstract]:In order to promote the engineering application of the expansion self stress grouting clamp technique, this paper carries out the test and analysis of the bearing performance of the large size clamp model. The expansion pressure distribution on the inner surface of the grouting ring is analyzed mainly through the multi point strain test of the inner tube surface, and the average expansion pressure of the outer surface of the grouting ring is analyzed by testing the bolt pulling force. Then the sliding bearing capacity of the hoop is measured by the "push out method" and the expansion pressure distribution is analyzed. The results show that the distribution of the expansion pressure on the inner surface of the grouting ring is the same, but the distribution of the expansion pressure in the different sections is not uniform. Because there is a gap at the top of the grouting ring, the bottom expansion pressure is the most. The pressure of the inner surface of the inner surface of the inner surface is smaller and the expansion pressure of the side surface is smaller. The value of the surface strain of the inner tube on the sliding bearing capacity is larger than that of the inner surface. The small size also confirms the uneven distribution of the swelling pressure. Besides, this type of hoop can form the bearing capacity within a short time (3~4d) after grouting.
【作者单位】： 中国海洋大学工程学院;海洋石油工程股份有限公司设计公司;
【基金】：山东省科技发展计划项目(2012GHY11523) 中国海洋石油总公司科技项目(CNOOC-KJ125ZDXM05GC00GC2014-02)资助~~
【分类号】：P756.2
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本文编号：1933910