CAJ | 학술논문

三峡工程三期截流,流量为12200m3/s,落差为5.77m,此截流工程将是目前世界上综合难度最大的截流工程。依据三峡工程1/80整体截流模型的试验成果及以往葛洲坝等工程的研究成果，对三期截流方案,防止抛投体流失的措拖,及垫底结构形式、施工时机等问题进行了讨论。认为:三峡三期截流方案以双戗截流为好;龙口先平抛垫底加糙可以有效地防止抛投料的流失;为确保垫底施工成功,垫底施工期在今冬明春为好;目前,20t混凝土四面体加3～5t大块石的垫底结构可基本满足渡汛的要求。方案仍需进一步优化研究。
삼협공정삼기절류,류량위12200m3/s,락차위5.77m,차절류공정장시목전세계상종합난도최대적절류공정。의거삼협공정1/80정체절류모형적시험성과급이왕갈주패등공정적연구성과，대삼기절류방안,방지포투체류실적조타,급점저결구형식、시공시궤등문제진행료토론。인위:삼협삼기절류방안이쌍창절류위호;룡구선평포점저가조가이유효지방지포투료적류실;위학보점저시공성공,점저시공기재금동명춘위호;목전,20t혼응토사면체가3～5t대괴석적점저결구가기본만족도신적요구。방안잉수진일보우화연구。
The suggested discharge for 3rd-stage river closure of TGP is 12200 m3/s ,and the final water drop is 5.77 m,thus,the closure work will be the largest o ne of comprehensive difficulties in the world.On the basis of primary test resul ts on integrated closure model of TGP with a scale of 180 and the experience o f Gezhouba Project's river closure,some problems,including 3rd-stage closure sc hemes,measures preventing the lose of riprap blocks in moving water,structure fo rm of bedding course and its construction period selection,etc.,are discussed.It is considered that:end dumping with double dykes is a preferable scheme;bedding course horizontally filled in advance with concrete blocks and stone materials for roughening the river bed may effectively prevent the lose of dumped materia l s;to guarantee the success of construction of bedding course,its construction pe riod should be selected at winter 2001 to spring 2002.At present,the bedding cou rse structure formed by 10 t-concrete tetrahedrons and large block stones weigh ing 3-5 t may meet the requirement for stubility in flood season.But it is need ed further study to be optimized.