中国水能及电气化
中國水能及電氣化
중국수능급전기화
China Water Power & Electrification
2015年
9期
67-70,58
,共5页
金属岔管%压痕应变法%残余应力%爆破法%龙江水电站枢纽
金屬岔管%壓痕應變法%殘餘應力%爆破法%龍江水電站樞紐
금속차관%압흔응변법%잔여응력%폭파법%룡강수전참추뉴
metal branch pipes%indentation strain method%residual stress%blasting method%Longjiang Hydropower Station Hydro-junction
水利水电工程大型厚壁压力钢管岔管通常由现场安装组焊完成，焊缝原始残余应力数值一般较高。在压力钢管荷载拉应力同焊接残余拉应力叠加时，将严重影响水电站压力钢管的安全运行。爆炸法靠瞬间爆轰产生的能量释放消除金属构件的焊接应力，作为一种先进的技术，具有施工简单、方便，不受结构尺寸和材料性质的限制等突出优点。本文介绍了云南龙江水电站枢纽工程应用爆破法消除输水压力钢管岔管焊接应力的原理、具体方法与实际效果。
水利水電工程大型厚壁壓力鋼管岔管通常由現場安裝組銲完成，銲縫原始殘餘應力數值一般較高。在壓力鋼管荷載拉應力同銲接殘餘拉應力疊加時，將嚴重影響水電站壓力鋼管的安全運行。爆炸法靠瞬間爆轟產生的能量釋放消除金屬構件的銲接應力，作為一種先進的技術，具有施工簡單、方便，不受結構呎吋和材料性質的限製等突齣優點。本文介紹瞭雲南龍江水電站樞紐工程應用爆破法消除輸水壓力鋼管岔管銲接應力的原理、具體方法與實際效果。
수이수전공정대형후벽압력강관차관통상유현장안장조한완성，한봉원시잔여응력수치일반교고。재압력강관하재랍응력동한접잔여랍응력첩가시，장엄중영향수전참압력강관적안전운행。폭작법고순간폭굉산생적능량석방소제금속구건적한접응력，작위일충선진적기술，구유시공간단、방편，불수결구척촌화재료성질적한제등돌출우점。본문개소료운남룡강수전참추뉴공정응용폭파법소제수수압력강관차관한접응력적원리、구체방법여실제효과。
Large thick wall pressure steel pipeline branch pipes in water conservancy and hydropower project are usually installed and welded in the site.Original residual stress numerical value of the weld is generally higher.When pressure steel pipe load tensile stress is superposed with welding residual tensile stress,safe operation of hydropower station pressure steel pipe will be seriously affected.Explosion method can eliminate welding stress of metal member through releasing energy produced by instantaneous detonation.It is regarded as an advanced technology and has prominent advantages of simple and convenient construction,no limitation by structure dimension and material property,etc.In the paper, principles,concrete methods and practical effect of applying blasting method for eliminating welding stress of water transfer pressure steel pipeline branch pipes in Yunnan Longjiang Hydropower Station Hydro-junction Project are introduced.
