软岩材料冻融过程中的水热迁移实验研究

研究了寒区冻融环境条件下软岩的水热迁移规律,对两种不同类型的软岩材料进行了开放系统下具有温度梯度的水热迁移实验研究.实验结果表明：不同类型的软岩材料水热迁移程度不同,试样中的石英矿物含量越高,温度场重新分布时间越长;温度梯度是水分迁移的主要驱动力,当温度梯度越大时,水分场则越快达到重新分布状态;孔隙率越高,则冻结过程越长.探讨了软岩材料的水热迁移机理及与冻土材料水热迁移的一致性与差异性.     

软岩类材料冻融过程水热迁移的实验研究初探

进行软岩类材料-水泥砂浆的冻融水热迁移实验，对两种不同类型的软岩类材料进行开放系统下具有温度梯度的水热迁移实验研究。实验结果表明：不同类型的软岩类材料水热迁移程度不同，试样中的石英矿物含量越高，温度场重新分布时间越长；温度梯度是水分迁移的主要驱动力，当温度梯度越大时，水分场越快达到重新分布状态；孔隙率越高，冻结过程越长。     

Numerical simulation and analysis of moisture-heat coupling of soft rock tunnels in the cold regions

With the western development in China, more problems with rock and soil engineering in cold regions will be encountered. To study the stability of rock mass under the frost and thaw condition is of far significance. We attempt to simulate and analyze the temperature and moisture field in the surrounding rock of Dabanshan tunnel at its exit KI06＋025 in the cold region by software Femlab. First, introduced the common numerical solution to the moisture and heat coupled about the soft rock in tunnels of cold region. Then gave emphasis on simulation of the law of temperature distribution coupled temperature-moisture field and draw a parallel between temperature fields with different coefficient of percolation. In the course of simulation we considered the problem of caloric receptivity, thermal conductivity and critical heat varying with temperature.     

拓家河水库加固工程帷幕灌浆分析

介绍了拓家河水库加固工程帷幕灌浆的全过程，提出“泥浆固壁配下PVC套管”的造孔方案新方案。