首页> 外文会议>Field measurements in geomechanics >Jacked-in pipe reinforcement of a deep excavation in soft soil
【24h】

Jacked-in pipe reinforcement of a deep excavation in soft soil

机译:软土地基深基坑顶进管加固

获取原文
获取原文并翻译 | 示例

摘要

Soil nailing is an in-situ ground improvement method which has gained increasing acceptance in this region, but is not generally recommended for clayey and organic soils. This restriction is empirically based, and little information exists on the performance of soil nails when the method is applied in these soil conditions. To address this gap, a deep excavation for the construction of a 3/12 storey deep basement carried out using a novel technique, which combines Contiguous Bored PIles and Jack-in pipe reinforcements, was instrumented to monitor its performance. This paper will highlight briefly the instrumentation program, which was set up mainly as a safety control and to monitor the interaction of this retaining system with the surrounding soft soil. In addition, numerical analyses were conducted to study the soil-structure interaction of this new construction technique. Data from the field monitoring and FEM analyses will be presented with regard to the effectiveness this system particularly the jacked-in pipes in supporting the deep excavation. It follows from this comparison that the field instrumentation and numerical analyses have proved to be valuable tools in assessing the deformations to be expected at critical stages of the excavation. The project shows that jacked-in pipe in soft clayey soils is possible, at least for short term and can be effectively used as temporary support in deep excavation.
机译:土钉法是一种现场地基改良方法,在该地区获得了越来越多的接受,但通常不建议用于黏土和有机土。这种限制是基于经验的,当在这些土壤条件下应用该方法时,关于土钉性能的信息很少。为了解决这个问题,使用了一种新技术,对3/12层深的地下室进行了深挖,该技术结合了连续钻孔桩和顶进管加固技术,以监测其性能。本文将简要介绍仪器程序,该程序主要是作为安全控制而设置的,用于监视该固定系统与周围软土的相互作用。此外,进行了数值分析,以研究这种新施工技术的土-结构相互作用。关于该系统的有效性,特别是顶管在支撑深基坑方面的有效性,将提供来自现场监测和有限元分析的数据。从这种比较可以看出,现场仪器和数值分析已被证明是评估在基坑关键阶段预期变形的有价值的工具。该项目表明,至少在短期内,在软质黏土中顶管是可行的,并且可以有效地用作深基坑中的临时支护。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号