| 裂隙岩体卸荷渗透规律试验研究 |
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| 引用本文： | 梁宁慧,刘新荣,艾万民,包太. 裂隙岩体卸荷渗透规律试验研究[J]. 土木工程学报, 2011, 0(1): 88-92 |
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| 作者姓名： | 梁宁慧 刘新荣 艾万民 包太 |
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| 作者单位： | 重庆大学;山地城镇建设与新技术教育部重点实验室(重庆大学);广东省重工建筑设计院;贵州大学 |
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| 基金项目： | 国家自然科学基金创新群体基金(50621403);教育部“新世纪优秀人才支持计划”(NCET-05-0763) |
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| 摘 要： | 边坡开挖等岩体工程使得岩体形成卸荷作用,同时引起岩体中地下水性态的改变。水库蓄、放水使库岸边坡产生加载、卸荷效应,库岸边坡的稳定性受到影响。这都涉及到有关卸荷-渗流问题,因此研究裂隙岩体卸荷渗透规律具有重要意义。文章通过裂隙岩体的卸荷-渗流试验,探讨了裂隙岩体的渗透系数在卸荷过程中的变化规律,不仅揭示了裂隙岩体渗透系数与卸荷量的近似双曲线关系,还验证了裂隙岩体在加载、卸荷过程中渗透系数的迟滞现象。同时从理论上推导了裂隙岩体卸荷量与渗透系数之间的关系式,并对式中的试验系数进行了优化计算,其计算结果与试验结果吻合较好。
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| 关 键 词： | 裂隙岩体 卸荷 渗流试验 渗透系数 |
Experiment study on the permeability of fractured rock under unloading |
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| Liang Ninghui,Liu Xinrong,Ai Wanmin,Bao Tai. Experiment study on the permeability of fractured rock under unloading[J]. China Civil Engineering Journal, 2011, 0(1): 88-92 |
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| Authors: | Liang Ninghui Liu Xinrong Ai Wanmin Bao Tai |
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| Affiliation: | 1. Chongqing University, Chongqing 400045, China; 2.Key Laboratory of New Technology for Construction ofCities in Mountain Area( Chongqing University ), Ministry of Education, Chongqing 400045, China;3. The Guangdong Provincial Architectural Design Institute of Heavy Industry, Guangzhou 5100343, China;4. Guizhou University, Guiyang 550003, China) |
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| Abstract: | Rock slope excavation and other geotechnical works cause unloading of rock formations and change of groundwater. Based on a unloading-seepage test of a fractured rock, the variations of the permeability coefficient and the unloading stress are discussed. A hyperbolic relationship between the permeability coefficient and the effective normal stress is revealed, and the hysteresis of permeability coefficient is also verified in the loading-unloading process for fractured rock. The theoretical relationship is derived from the unloading volume of fractured rock and the permeability coefficient. |
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| Keywords: | fractured rock unloading seepage experiment permeability coefficient |
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