摘要
通过对引江济淮试验工程的膨胀岩重塑样进行无荷及有荷膨胀率试验,研究了线膨胀变形速率随时间的变化规律,确定了线膨胀变形速率与初始含水率、上覆荷载的关系,以及线膨胀变形速率与最终膨胀率的关系。试验结果表明,线膨胀变形速率与时间在双对数坐标上近似呈线性关系减小;在膨胀过程的前期线膨胀变形速率随初始含水率的增加而减小,后期线膨胀变形速率随初始含水率的增加而增加;线膨胀变形速率随上覆荷载的增大而急剧减小,在线膨胀变形速率与时间的双对数坐标上近似呈线性关系;最终膨胀率随线膨胀变形速率的增加近似呈二次函数正相关,此研究成果对于通过线膨胀率速度的变化规律预测长期的膨胀变形有重要意义。
By the test of expansion ratio under different pressure of remolded expansive stone in the test section of diversion of water from the Yangtze River to the Huai River,to conclude relationship between the linear expansion rate with time,initial moisture content,pressure,and final expansion ratio.The test result suggested that the linear expansion rate was approximately linear decreased with time on the double logarithmic coordinate axis; the linear expansion velocity decreases with the initial moisture content at the early stage of the expansion process,and increases with the increase of initial moisture content later; linear expansion speed decreases sharply with the increase of overlying load,and expansion speed were approximately linear related with time on the double logarithmic coordinate axis;the final expansion ratio was a quadratic function related to the initial speed of linear expansion; the research result had an important significance to predict the long-term deformation by the change rule of linear expansion rate.
出处
《能源与环保》
2017年第11期179-183,共5页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
膨胀岩
膨胀率
初始膨胀变形速率
试验
expansive stone
expansion ratio
linear expansion rate
test
