Investigation of Foundation Isolation Tube Performance

基础隔离管性能研究

• 批准号: 9214248
• 负责人: Steven Kramer
• 金额: $ 28.01万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-06-01 至 1996-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9214248&HistoricalAwards=false
• 关键词: Investigation; Foundation; Isolation; Tube; Performance

Expansive soils damage to residential and light commercial occur in many parts of the United States and it has been estimated to cause annual losses on the order of $6-7 million. The project will test laboratory models and full- scale prototypes of a device called foundation isolation tube which is intended to greatly reduce damage to structure foundations caused by expansive soils. In both sets of tests, the performance of instrumented drilled shafts constructed both, with and without foundation isolation tubes will be monitored during periods of soil moisture variation. Comparison of the performance of these shafts will verify the effectiveness of this mitigation technique in reducing axial loads due to the vertical movement of expansive soils. The results of this research will provide an improved understanding of the nature of subsurface moisture migration in the vicinity of drilled shaft foundations. Guidelines for the use of this technique will be developed allowing geotechnical engineers to design more reliable and economical foundations in expansive soils sites.

膨胀土对住宅和轻型商业的破坏发生在美国许多地区，据估计每年都会造成损失大约600-700万美元。该项目将测试一种名为基础隔震管的装置的实验室模型和全尺寸原型，该装置旨在极大地减少损害用来构造由膨胀土引起的基础。在这两组测试中，仪表式钻井轴的性能分别为在土壤水分变化期间，将监测有无基础的隔离管。对这些轴的性能进行比较将验证这种缓解技术在减少由于膨胀土的垂直运动。这项研究的结果将有助于更好地了解钻井井筒附近地下水分迁移的性质。基金会。将制定使用该技术的指导方针，使岩土工程师能够在膨胀土场地。