南水北调与水利科技
南水北調與水利科技
남수북조여수리과기
SOUTH-TO-NORTH WATER
2014年
5期
27-31,53
,共6页
田雨%李洪涛%刘燚%姚强%姜凌宇
田雨%李洪濤%劉燚%姚彊%薑凌宇
전우%리홍도%류일%요강%강릉우
喜儿沟水电站%施工安全%爆炸冲击波%数值模拟%LS-DYNA%爆炸助沉法
喜兒溝水電站%施工安全%爆炸遲擊波%數值模擬%LS-DYNA%爆炸助沉法
희인구수전참%시공안전%폭작충격파%수치모의%LS-DYNA%폭작조침법
Xi'ergou hydropow er station%construction safety%explosive blast%numerical simulation%LS-DYNA%aid-sinking by ex-plosion method
喜儿沟水电站大型调压井采用沉井法施工。考虑到沉井结构尺寸大，且位于漂卵砾石复杂地层中，在下沉施工中采用爆炸助沉法，通过冲击波超压的交替升降使井壁振动产生下沉，从而解决下沉受阻难题。针对喜儿沟工程实例，通过理论计算和动力有限元数值模拟，分别得到沉井不发生破坏的炸药最大允许用量分别为171.13 kg 和74.87 kg。在实际工程中采用小药量助沉可以在保证施工安全前提下，完成施工任务。
喜兒溝水電站大型調壓井採用沉井法施工。攷慮到沉井結構呎吋大，且位于漂卵礫石複雜地層中，在下沉施工中採用爆炸助沉法，通過遲擊波超壓的交替升降使井壁振動產生下沉，從而解決下沉受阻難題。針對喜兒溝工程實例，通過理論計算和動力有限元數值模擬，分彆得到沉井不髮生破壞的炸藥最大允許用量分彆為171.13 kg 和74.87 kg。在實際工程中採用小藥量助沉可以在保證施工安全前提下，完成施工任務。
희인구수전참대형조압정채용침정법시공。고필도침정결구척촌대，차위우표란력석복잡지층중，재하침시공중채용폭작조침법，통과충격파초압적교체승강사정벽진동산생하침，종이해결하침수조난제。침대희인구공정실례，통과이론계산화동력유한원수치모의，분별득도침정불발생파배적작약최대윤허용량분별위171.13 kg 화74.87 kg。재실제공정중채용소약량조침가이재보증시공안전전제하，완성시공임무。
The construction of large surge shaft in Xi'ergou hydropower station adopted the open caisson method. Due to that the open caisson has a large structure and is located in the complex strat a of pebbles gravel, the aid-sinking by explosion method w as used to solve the problem of the blocked subsidence during the sinking construction according to that vibration can cause the shaft lining sinking resulting from the alt ernating rise and fall of overpressure of shock w ave. T he theoretical analysis and nu-merical simulation w ere performed on the Xi'ergou project to det ermine the maximum allowed amounts of explosive, which were 171.13 kg and 74. 87 kg for the two methods respect ively. In practical engineering, aid-sinking w ith small amount of explosive can complete the construction tasks under the guarantee of construction safety.
