三桥静力触探在桩基中的应用研究

发布时间：2018-06-10 04:51

本文选题：桩基础 + 三桥静力触探　；参考：《岩石力学与工程学报》2015年04期

【摘要】：通过研发具有强贯入能力的新型步履式静力触探,使之能够对强风化岩等较硬岩土层进行测试,从而满足端承型桩勘察深度的要求,同时在原有双桥静力触探的基础上增加总贯入力的测试,并称之为三桥静力触探。通过三桥静探试验与钢管桩沉桩试验的对比研究,将整个岩土层作为一个系统考虑,提出一套较精确估算指定桩径和深度下的压桩力、或指定压桩力和桩径下桩入土深度的新方法。并通过三桥静探试验与静载荷试验的对比研究,总结出珠三角地区端承型桩极限承载力的估算新方法,填补了目前规范的空白。以上研究成果表明具有强贯入能力的三桥静力触探能够为桩基础的设计、施工和检测提供非常有用的指导。
[Abstract]:Through the research and development of a new type of walking static penetration probe with strong penetration ability, it can be used to test the hard rock and soil layers such as strong weathered rock, so as to meet the requirements of the investigation depth of the end bearing pile. At the same time, the test of total penetration force is added on the basis of the original static penetration of the two bridges, and it is called the static penetration test of the three bridges. By comparing the static test of the third bridge with the pile-driving test of the steel pipe pile, the whole rock and soil layer is considered as a system, and a set of accurate estimation of the pressure-pile force under the specified diameter and depth of the pile is put forward. Or a new method for specifying the pressure of the pile and the depth of the pile under the pile diameter. A new method for estimating the ultimate bearing capacity of end-bearing pile in the Pearl River Delta region is summarized through the comparative study of static exploration test and static load test of the three bridges, which fills up the blank of the present code. The above research results show that the three bridges with strong penetration ability can provide very useful guidance for the design, construction and inspection of pile foundation.
【作者单位】：广东永基建筑基础有限公司;
【分类号】：TU473.1

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