CAJ | 학술논문

随着三峡水利建设工程的进行,许多原本位于水面以上且已趋于稳定的人工或自然岩质边坡将被淹没,导致边坡稳定性降低,而水的压力、冲击、渗流和侵蚀等综合作用,给下岩质边坡的稳定性带来大量的不确定性.基于已有的水下土质边坡稳定性试验和水下岩质边坡有限元分析,进行水下岩质边坡模型试验研究,探讨在水位升降水过程中和波浪作用下水下岩质边坡的稳定性和破坏机制.将结构面为30°和50°的两种岩质边坡模型布置在人工水槽中,采用波流系统进行水位升降水波浪冲击试验,量测岩质边坡的应力变化.通过分析边坡各测点应力变化,得出了一些有意义的结论:(1)把边坡前部岩体划分成3个区域,每个区域内应力变化规律相同;(2)水下岩质边坡坡脚处应力集中最大,破坏始于坡脚,并由此产生的塑性区沿结构面逐渐同坡顶发展,这与一般边坡从坡顶逐渐向下发展的开裂破坏形式完全不同;(3)波浪对水下岩质边坡结构面的影响,将随其倾角的变小而减弱.
수착삼협수리건설공정적진행,허다원본위우수면이상차이추우은정적인공혹자연암질변파장피엄몰,도치변파은정성강저,이수적압력、충격、삼류화침식등종합작용,급하암질변파적은정성대래대량적불학정성.기우이유적수하토질변파은정성시험화수하암질변파유한원분석,진행수하암질변파모형시험연구,탐토재수위승강수과정중화파랑작용하수하암질변파적은정성화파배궤제.장결구면위30°화50°적량충암질변파모형포치재인공수조중,채용파류계통진행수위승강수파랑충격시험,량측암질변파적응력변화.통과분석변파각측점응력변화,득출료일사유의의적결론:(1)파변파전부암체화분성3개구역,매개구역내응력변화규률상동;(2)수하암질변파파각처응력집중최대,파배시우파각,병유차산생적소성구연결구면축점동파정발전,저여일반변파종파정축점향하발전적개렬파배형식완전불동;(3)파랑대수하암질변파결구면적영향,장수기경각적변소이감약.
With the construction of the Three Gorges Project, many natural and artificial rock slopes will be drown, then the stability of these slopes will reduce. The comprehensive factors of the water pressure, water leakage, water impaction and water corrosion will endanger the stability of underwater rock slope. Based on the model tests of the stability of soil slope and the analysis of the rock slope by the finite element method, the model tests of stability and damage mechanism of underwater rock slope are carried out, including the ascending and descending water level test and the wave impaction test. Some significant conclusions can be drawn from the model tests by measuring and analyzing the stress distributions with different structural angles (30° and 50°) slopes in the artificial wave tank. The rock slope can be divided into three regions in which the stress variation rule is the same. The results show that the stress concentration occurs to the slope toe, where failure begins, plastic zone develops upwards along the discontinuity, which is different from the downward failure mode happened to general slopes; it's also concluded that the effect of the wave on the slope discontinuity decreases with the slope angle.