CAJ | 학술논문

目前,通常采用原型监测的方法了解土石坝运行期渗流情况,但对稳定期渗流研究较多,而未有在土石坝初次蓄水期原位钻孔渗流试验相关研究.瀑布沟水电站大坝由于788.00 m高程以上心墙较薄且早期未布置监测仪器,前期监测显示大坝可能存在抗渗薄弱区域,在初次蓄水期于心墙0+131及0+434断面进行了原位钻孔渗流试验.通过对试验成果分析并与监测成果相比较,得出大坝心墙0+131、0+434断面部分高程存在渗透薄弱带.试验结果表明,通过精心组织设计施工,进行蓄水期心墙原位钻孔渗流试验是可行且有意义的.建议对反滤层保护下的裂缝土体抗渗强度进行评价,加强心墙防渗安全监测以及时掌握心墙运行状况.其试验研究可以为其他砾石土心墙坝的设计、施工、运行期的安全提供参考.
목전,통상채용원형감측적방법료해토석패운행기삼류정황,단대은정기삼류연구교다,이미유재토석패초차축수기원위찬공삼류시험상관연구.폭포구수전참대패유우788.00 m고정이상심장교박차조기미포치감측의기,전기감측현시대패가능존재항삼박약구역,재초차축수기우심장0+131급0+434단면진행료원위찬공삼류시험.통과대시험성과분석병여감측성과상비교,득출대패심장0+131、0+434단면부분고정존재삼투박약대.시험결과표명,통과정심조직설계시공,진행축수기심장원위찬공삼류시험시가행차유의의적.건의대반려층보호하적렬봉토체항삼강도진행평개,가강심장방삼안전감측이급시장악심장운행상황.기시험연구가이위기타력석토심장패적설계、시공、운행기적안전제공삼고.
@@@@At present the prototype monitoring is commonly used to know the seepage in performance period in earth-rock dam. Much research to stable seepage and there is no report about in-situ drilling tests of seepage during the first impoundment. In Pubugou hydropower station,the core-wall is such thin and not decorated with any monitoring instruments at early time above the elevation of 788.00 m. Weak areas of anti-permeability are revealed probably by the earlier monitoring, in-situ drilling tests of seepage is carried out in the core-wall during the first impoundment at 0+131and 0+434 section in August 2010. The results of the test analysis shows that, weak penetration area exists at some elevation of section 0+131and section 0+434 in the core-wall of Pubugou hydropower station. It also shows that under the necessary condition, in situ drilling tests in the core-wall during the first impoundment is practical and meaningful. The anti-permeability of fissured soil under the protection of reversed filter is suggested to be evaluated, the seepage monitoring in core-wall should be strengthened to inspect the safety of the core-wall. The experiment researches provide a reference for other gravel soil core wall of the dam design, construction, and the safety of the operation period.