| 刘杰,于振民,王瑞红,李建林.砂岩劈裂裂隙无充填多因素影响下渗流规律研究[J].水利学报,2016,47(1):54-63 |
| 砂岩劈裂裂隙无充填多因素影响下渗流规律研究 |
| Research on seepage law of splitting sandstone with non-fillers under multiple factors |
| 投稿时间：2015-04-02 |
| DOI：10.13243/j.cnki.slxb.20150365 |
| 中文关键词: 劈裂砂岩 过流面积 非均匀系数 渗透系数 裂隙渗流 孔隙介质渗流 |
| 英文关键词: splitting sandstone seepage area non-uniform coefficient coefficient of permeability crack seepage average seepage |
| 基金项目:水利部公益基金项目(201401029);国家自然科学基金重点项目(51439003);国家自然科学基金项目(51579138,51279091,51479102);湖北省自然科学基金项目(2014CFB673);三峡大学拔尖人才计划项目(KJ2014H012);宜昌市科学技术研究与开发项目(A15-302-a07) |
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| 中文摘要: |
| 岩石裂隙渗流规律复杂,影响因素众多,其研究对工程防渗堵漏意义重大。利用 ELE 岩石渗透仪对劈裂砂岩进行裂隙渗流试验,采用基于 CAD-ANSYS 接口程序、ANSYS 蒙皮技术,ArcGIS 联合建模计算劈裂面面积等方法,试验研究不同应力条件下,劈裂面面积、迹线长度、进出口长度、结构面粗糙度、应力路径等多因素共同影响下的裂隙渗流量变化规律。分析得出应力路径对渗流量有显著的影响：围压恒定时,渗流量与渗透压呈负指数函数关系;渗透压恒定时,渗流量与围压呈幂函数关系。提出不均匀系数λ,可反映渗透压恒定围压持续加载情况下渗流量随围压的变化规律;提出高效控渗临界点和有效控渗临界点,可描述渗透压恒定时渗流量随围压变化的规律,为工程加压止渗提供参考。根据试验结果,推导出裂隙渗流参数转化为孔隙介质渗流参数的渗透系数 k的表达式,为裂隙岩体的孔隙介质渗流分析提供借鉴参考。 |
| 英文摘要: |
| The crack seepage law of splitting sandstone is complex with numerous influence factors, so its research is of great significance to end infiltration in engineering. Experiment on seepage of splitting sandstone was carried out by using ELE rock seepage instrument. Based on the methods of CAD-ANSYS interface program, ANSYS skin technology and ArcGIS collaborative modeling that calculates the splitting surface area. Studies on seepage flow variation rules caused by splitting surface area,trace length,import and export length, joint roughness and various stress paths were conducted. The results show that variation stress path has a significant effect on the seepage flow. Seepage flows with negative exponential function change when the confining pressure is constant while the seepage pressure increasing; and seepage flows with power function change when the seepage pressure is constant while the confining pressure increasing. Then non-uniform coefficient λ is put forward, which can reflect the seepage flow variation rules with confining pressure when the seepage pressure is a constant. And efficient ended infiltration and effective ended infiltration are put forward, which can describe the seepage flow variation rules with confining pressure when the seepage pressure is constant and can provide references for exerting pressure and ending infiltration. According to the test results, permeability coefficient k is put forward, which means that seepage parameter of porous medium and crack seepage parameter can be converted to each other, and in addition which can provide a reference for seepage of porous medium of splitting sandstone. |
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