山区地质嵌岩灌注桩桩端性状的检测

黄阳; 施峰; 林清意; 曾文

山区地质嵌岩灌注桩桩端性状的检测 English Version

黄阳^{1, 2},
施峰^{1, 2},
林清意^{1, 2},
曾文^{1, 2}

1. 福建省建筑科学研究院,福建福州 350025; 2. 福建省绿色建筑技术重点实验室,福建福州 350025

详细信息

作者简介:
黄阳(1971- )，男，福建建瓯人，高级工程师，主要从事地基基础检测、监测、工程信息化、仪器开发等方面的研究。E-mail: hyleojoy@163.com。

中图分类号: TU47
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出版历程
- 收稿日期: 2013-06-14
- 发布日期: 2013-11-24

Tests on tip status of rock-socketed cast-in-place piles in mountainous geology

HUANG Yang^{1, 2},
SHI Feng^{1, 2},
LIN Qing-yi^{1, 2},
ZENG Wen^{1, 2}

1. Fujian Academy of Building Research, Fuzhou 350025, China; 2. Fujian Provincial Key Laboratory of Green Building Technologies, Fuzhou 350025, China

摘要

摘要: 嵌岩灌注桩桩端性状对其承载力有很大的影响。结合一个多种方法测试的工程实例,对山区地质的嵌岩灌注桩嵌岩性状的检测判定进行了研究。提出了低应变法检测的反射波形态和幅值,会受混凝土-岩强度比值和锤重影响；同时,在桩长一半处,若存在扩径或嵌岩的反相位信号,将会在桩顶形成正相位的二次反射信号,影响桩底反射的判别。还介绍了一些钻芯法判定嵌岩性状的经验,提出摄像法监测进尺、回水情况的建议。
- 嵌岩桩 /
- 低应变反射波法 /
- 混凝土-岩强度比值 /
- 锤重 /
- 二次反射
Abstract: The bearing capacity of rock-socketed cast-in-place piles is affected significantly by their tip status. Based on an engineering case, the rock-socketed cast-in-place piles under mountainous geology are tested by using many methods. The judgments of pile tip status are analyzed. An opinion is proposed that the shape and amplitude of low strain reflection wave method are influenced by the strength ratio of concrete-rock and the weight of hammer. At the mean time, a secondary reflection signal with the same phase will be formed on the pile top if there is expanding or opposite phase rock-socketed signal at the half length of the piles, which will confuse the judgment of reflection at the pile tip. Experience of core-drilling test method for judgment of rock-socketed status is introduced. Some suggestions such as camera monitoring footage and backwater near the pile tip are also proposed.
- rock-socketed pile /
- low-strain reflection wave method /
- strength ratio of concrete rock /
- hammer weight /
- secondary reflection

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参考文献(5)

[1]	HUANG Yang. Multi-methods testing on tip faults of rock-socketed cast-in-place piles: the application of stress-wave theory to piles: science, technology and practice[M]. Lisbon: IOS Press, 2008, 6(1): 681-685.
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