结构工程师2011，Vol.27Issue(4)：104-108,5.
基坑坑底反弹引起的灌注桩裂缝问题的处理
Measures to Handling Cracks in Drilling Piles Caused by Rebounding of Foundation
朱皓明1
作者信息
- 1. 中船第九设计研究院工程有限公司,上海200063
- 折叠
摘要
Abstract
Drilling piles were used in the foundation of a project in Shanghai. Based on the low-strain-dynamic-survey results, defects were found from 8 m to 9 m depth on bodies of nearly 55 percent of the compression-load-bearing drilling piles. The reasons were analysed according to the design condition and construction situation. Rebounding of soil body which produced by the foundation ditch excavation was the main reason to make the piles crack. Dynamic resetting and foundation strengthening were employed to deal with the defects. It was proved by the high-strain-dynamic-survey, which was carried on piles after dynamic resetting, that the cracks on these piles were closed. Specifications were proposed for constructing of drilling piles to avoid the crack of piles. Proposals to calculate the rebounding of foundation and its effects on drilling piles were also presented.关键词
坑底反弹/桩身断裂/桩身检测/动力复位法Key words
rebounding of the foundation/shaft breakdown/shaft detection/dynamic resetting引用本文复制引用
朱皓明..基坑坑底反弹引起的灌注桩裂缝问题的处理[J].结构工程师,2011,27(4):104-108,5.
