杨何,汤明高,许强,霍宇翔,向育才,邓文锋.三峡库区消落带岸坡岩体劣化特性测试及质量评价[J].水利学报,2020,51(11):1360-1371 |
三峡库区消落带岸坡岩体劣化特性测试及质量评价 |
Deterioration characteristic test and quality evaluation of bank slope rock mass in hydro-fluctuation belt of Three Gorges Reservoir Area |
投稿时间:2020-02-21 |
DOI:10.13243/j.cnki.slxb.20200094 |
中文关键词: 三峡库区 消落带 岩体质量 劣化性 评价方法 |
英文关键词: Three Gorges Reservoir area hydro-fluctuation belt rock mass quality deterioration evaluation method |
基金项目:四川省科技计划项目(2019YJ0403);国家自然科学基金项目(41977255);三峡后续地质灾害防治重大课题(0001212015C C60 005) |
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中文摘要: |
三峡库区自2003年首次蓄水以来,在库水位周期性升降作用下,消落带岸坡岩体的物理力学性质逐渐劣化,从而引发多次岩质岸坡的失稳破坏,严重影响和威胁库区航道运营安全。以三峡库区典型的泥质粉砂岩、泥灰岩、灰岩岸坡为研究对象,应用地质雷达、回弹仪对消落带及高水位以上的岩质岸坡进行岩体质量测试,采用钻孔取芯及室内声波测试进行验证,对岩体劣化性质进行了质量评价。研究认为三峡库区岸坡岩体的劣化模式分为溶蚀塌落型、层面龟裂型、层间碎裂型和侵蚀剥落型4类,并提出了水库岸坡岩体质量劣化性质的现场评价方法与指标体系。研究成果对于大型水库岩质岸坡岩体质量劣化评价及稳定性分析具有指导和参考价值。 |
英文摘要: |
Since the first impoundment of the Three Gorges Reservoir in 2003, the physical and mechanical properties of the bank slope rock mass in hydro-fluctuation belt have gradually deteriorated under the periodic rise and fall of the reservoir water level,which has caused a number of rock bank slope instability damage,seriously affecting and threatening the safety of waterway operation in the reservoir area. In this paper, firstly, taking typical bank slopes of argillaceous siltstone, marl and limestone in the Three Gorges Reservoir area as research object, the rock mass quality of bank slope in the fluctuation zone and above the high water level is tested by ground penetrating radar and rebound instrument, and verified by borehole coring and indoor acoustic wave testing; and the quality evaluation of rock mass deterioration is carried out comprehensively. Study found the deterioration modes of rock mass of Three Gorges Reservoir can be divided into four types:dissolution collapse type, layer cracks type, interlayer fragmentation type and erosion spalling type; the evaluation method and index system of rock mass deterioration of reservoir bank slope on site are put forward. The research results can provide guidance and reference value for the deterioration evaluation and stability analysis of rock mass quality of rock bank slope of large reservoir. |
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