岩土工程学报2016，Vol.38Issue(z2)：18-23,6.DOI:10.11779/CJGE2016S2003
坝基覆盖层工程特性试验新方法研究与应用
New experimental methods for engineering properties of overburden of dam foundation and their applications
摘要
Abstract
For many high rockfill dams, which are constructed or will be constructed in Southwest China, deep overburden is one of the most complex engineering problems. The deformation and stress status play an important role in the safety of dams. For the traditional methods, because it’s almost impossible to collect gravel overburden layer samples, the original density cannot be determined exactly. Thus, it is very difficult to get the reliable mechanical and seepage properties of overburden layer in laboratory tests. A new method that indirectly calculates the original density of overburden gravel using pressuremeter tests (PMT) or dynamic penetration tests (DPT) is proposed. In the construction period of Wudongde, this method is successfully applied to the determination of the density of overburden layer. Furthermore, based on the indoor model tests, it is verified that the correction factor of rod length in DPT follows the description of Newton elastic collision theory. Therefore, a new pressuremeter probe with high pressure and side expansion is developed in order to conduct the whole-process pressuremeter tests on deep overburden. The proposed whole set method provides an important technical support for further studies on the engineering properties of deep overburden of dam foundation.关键词
覆盖层/砂砾石/旁压试验/动力触探/模型试验Key words
overburden layer/gravel/pressuremeter test/dynamic penetration test/model test分类
建筑与水利引用本文复制引用
程展林,潘家军,左永振,胡胜刚,程永辉..坝基覆盖层工程特性试验新方法研究与应用[J].岩土工程学报,2016,38(z2):18-23,6.基金项目
国家自然科学基金项目（51379021）；长江科学院创新团队项目（2015051/YT ）；中央级科研院所基本科研业务费项目 （）
