| 1. | Stress and displacement fields around a pressure tunnel in transversely isotropic soil
横观各向同性土体中压力隧洞的应力和位移计算 |
| 2. | Application of laser directional instrument in underground high pressure tunnel construction
激光指向仪在井下大压力巷道施工中的应用 |
| 3. | The flow in outlet structure of pressure tunnel is simulated by using monte carlo method with irregular random walking grids in this paper
摘要利用不规则游动网格的蒙特卡罗法对有压隧洞出口段水流进行了数值模拟。 |
| 4. | Therefore , the study of the behavior of pressure tunnels should be based on the coupled seepage - stress model in order to guide the practice in reason
因此，从渗流场和应力场耦合的角度，探求压力隧洞围岩性状，进而指导工程实践，具有重要的理论和工程意义。 |
| 5. | Finally , based on the stresses analysis of the rock mass , the existed design rules are discussed , and a new method to predict the safe location of the pressure tunnels is developed
最后，根据对围岩应力场的分析，对现有确定压力隧洞最小覆盖层的经验准则进行了评价，提出一种新的确定压力隧洞位置的方法。 |
| 6. | To meet the peaking need of the grid and improve the source structure of the system , it is necessary to construct the mass pumped storage power station . and more high pressure tunnels will be constructed
大规模抽水蓄能电站的建设是现代电网的必然产物，它在电力系统中起调峰填谷作用，提高电网运行的灵活性和可靠性；相应高水头大直径水工压力隧洞的建设也逐渐增多。 |
| 7. | Second , the influence of angle was analyzed in the stresses analysis in the rock mass around the excavation . the stress field around pressure tunnels using the coupled seepage - stress model to evaluate , and the stability of the slope with impermeable surface is analyzed
在渗流场和应力场耦合的基础上对倾斜地表下压力隧洞围岩应力场特性进行分析；并对稳态渗流场下围岩应力场以及上覆层稳定性进行详细分析。 |
| 8. | Finite volume method is appilied in numerical modeling of the flow in no - pressure tunnel of high water reservoir in this paper . i select standard k - turbulence modeling that put forward by launder and spalding in 1972 by weighted poly - turbulence modeling . the difficulty is that there is free surface in flow , but free surface problem ' s calculating region is indefinitely
本文利用有限体积法对高水头下水库无压泄水洞水流进行了紊流数值模拟，根据多种紊流模型的优缺点进行比较，选择了launder和spalding于1972年提出的标准的k ?紊流模型。 |
| 9. | In this thesis , the rock mass is treated as a continuous porous elastic medium , on the basis of the seepage field of the rock mass , the pore - water - pressure distribution in the rock mass around the tunnels is evaluated . then , the seepage - induced stresses in the rock mass is studied . based on the analysis of stress field in the rock mass around the excavation , the stresses behavior of the pressure tunnel with the internal pressure is studied using the coupled seepage - stress model
本文将围岩看作连续的透水弹性介质，从压力隧洞围岩渗流场着手，分析压力隧洞围岩中水压力分布，进而研究围岩中渗流产生的应力场，结合对隧洞围岩二次应力场的分析，探讨考虑渗流场和应力场耦合作用下围岩三次应力场特性。 |
| 10. | On the basis of the stresses analysis , the existed design rules of pressure tunnels are discussed . first , the pore - water - pressure distribution in the rock mass around the pressure tunnel is evaluated using the image well method proposed by harr ( 1962 ) . the seepage - induced stresses in the rock mass is analyzed , and several conclusions are gained
首先，运用harr ( 1962 )镜像原理推求压力隧洞围岩中水压力分布；结合水压力的分析，利用fernandez ( 1994 )的假定推求压力隧洞围岩中渗流产生的应力场，并对不同地表条件下渗流产生的应力场进行详细分析，从中得到一些结论。 |
