文献类型：期刊文献

中文题名：岩体裂隙非饱和渗流试验系统研制及应用

英文题名：Development and application of test system for unsaturated seepage flow in rock fractures

作者：张拓威[1,2,3,4];胡云进[1,2,3];夏佳龙[1,2,3]

机构：[1]浙江省岩石力学与地质灾害重点实验室,浙江绍兴312000;[2]绍兴文理学院土木工程学院,浙江绍兴312000;[3]浙江省山体地质灾害防治协同创新中心,浙江绍兴312000;[4]浙江省第十一地质大队,浙江温州325006

年份：2021

卷号：41

期号：3

起止页码：573

中文期刊名：桂林理工大学学报

外文期刊名：Journal of Guilin University of Technology

收录：CSTPCD、、北大核心、北大核心2020

基金：国家自然科学基金项目(41977256);浙江省自然科学基金项目(LY18E090004)。

语种：中文

中文关键词：岩体裂隙;非饱和渗流;非饱和水力参数;试验系统研制

外文关键词：rock fracture;unsaturated seepage flow;unsaturated hydraulic parameter;development of test system

中文摘要：为了准确测定岩体裂隙非饱和水力参数,并揭示裂隙非饱和渗流特性及规律,设计研发了一套裂隙非饱和渗流试验系统。该系统不仅可以实现真正意义上的岩体裂隙非饱和渗流,而且使用高精密的柱塞泵、电子天平、压力传感器和回压控制系统等,可确保试验的测量和控制精度。通过开展岩体单裂隙非饱和渗流试验,初步阐明了单裂隙非饱和渗流的一些水力特性:实际岩体裂隙相对于概化模型裂隙具有更大的束缚水饱和度,而且由于薄膜水和孔角毛细水的存在,当饱和度很低时,非饱和渗透系数也较概化模型裂隙大。建立了毛细压力与非饱和渗透系数之间的试验关系,通过对试验数据的分析提出了毛细压力-非饱和渗透系数的拟合公式,根据与前人所建立的经验公式对裂隙吸水和排水过程拟合结果的对比可知,本文公式的拟合精度高,对于深入研究裂隙非饱和渗流具有一定的参考价值,同时,试验结果表明本文试验系统是准确可靠的,可用于岩体裂隙非饱和水力参数的测定及非饱和渗流特性的研究。

外文摘要：In order to accurately measure unsaturated hydraulic parameters of rock fractures and find the characteristics and laws of unsaturated seepage flow in fractures,a set of fracture unsaturated seepage test systems was designed and developed.The composition and the main function of the test system were also presented.The test system is mainly composed of injection system,model system,confining pressure system,back pressure control system and measurement and data acquisition system.The unsaturated seepage flow of rock fracture can be realized by the test system.The selection of high-precision piston pump,pressure sensor,electronic balance and back pressure control system can ensure the test measurement and control accuracy.By rock single-fracture unsaturated seepage test,some hydraulic characteristics of single-fracture unsaturated seepage are clarified.Compared with the generalized model fracture,the actual rock mass fracture has a larger irreducible water saturation.The unsaturated permeability coefficient is larger than that of the generalized model fracture when the saturation is very low due to the existence of thin film water and pore corner capillary water.The test relationship between capillary pressure and unsaturated permeability coefficient is established.Through the analysis of test data capillary pressure and the fitting formula of unsaturated permeability coefficient are proposed.According to established and predecessors experience formula of fissure water and drainage process,the high precision fitting formula has reference for further study.The system is accurate and reliable.It can be used to measure unsaturated hydraulic parameters of rock fractures and unsaturated seepage flow characteristics.