水电自动化与大坝监测
水電自動化與大壩鑑測
수전자동화여대패감측
HYDROPOWER AUTOMATION AND DAM MORNITORING
2012年
5期
14-20
,共7页
特高拱坝%原型监测%数值仿真试验%坝基变形%综合对比
特高拱壩%原型鑑測%數值倣真試驗%壩基變形%綜閤對比
특고공패%원형감측%수치방진시험%패기변형%종합대비
ultra-high arch dam%prototype monitoring%numerical simulation test%foundation deformation%comprehensive comparison
基于原型监测和数值仿真试验成果,研究了小湾特高拱坝首蓄期坝基变形特性。通过集成和整合理论推导、相关分析、综合过程线对比分析、工程类比、数学模型分析等定性和定量分析手段,形成了一套变形分析和状态评估的方法。首先,运用实测值过程线分析、特征值统计、相关分析等定性半定量方法归纳和总结了坝基的变形特征,找出若干需要重点关注的＂疑点＂问题。然后,运用相关分析、数学模型分析、成因分析、数值仿真试验等定量方法进行物理解释和机理分析。最后,运用工程类比、模型监控等综合比较的方法,对坝基的变形状态进行评估。分析发现：首蓄期小湾坝基整体向下游和两岸山体方向变形,径向水平位移明显大于切向水平位移,河床坝段径向位移大于岸坡坝段径向位移,变形空间对称性总体较好;拱端切向变形较小,未见重大异常。河床坝基径向变形尽管较大,但变化符合力学规律,当前仍处于可控状态。综合分析认为,小湾特高拱坝经受了1 218m高库水位作用的考验,坝基变形规律总体正常。
基于原型鑑測和數值倣真試驗成果,研究瞭小灣特高拱壩首蓄期壩基變形特性。通過集成和整閤理論推導、相關分析、綜閤過程線對比分析、工程類比、數學模型分析等定性和定量分析手段,形成瞭一套變形分析和狀態評估的方法。首先,運用實測值過程線分析、特徵值統計、相關分析等定性半定量方法歸納和總結瞭壩基的變形特徵,找齣若榦需要重點關註的＂疑點＂問題。然後,運用相關分析、數學模型分析、成因分析、數值倣真試驗等定量方法進行物理解釋和機理分析。最後,運用工程類比、模型鑑控等綜閤比較的方法,對壩基的變形狀態進行評估。分析髮現：首蓄期小灣壩基整體嚮下遊和兩岸山體方嚮變形,徑嚮水平位移明顯大于切嚮水平位移,河床壩段徑嚮位移大于岸坡壩段徑嚮位移,變形空間對稱性總體較好;拱耑切嚮變形較小,未見重大異常。河床壩基徑嚮變形儘管較大,但變化符閤力學規律,噹前仍處于可控狀態。綜閤分析認為,小灣特高拱壩經受瞭1 218m高庫水位作用的攷驗,壩基變形規律總體正常。
기우원형감측화수치방진시험성과,연구료소만특고공패수축기패기변형특성。통과집성화정합이론추도、상관분석、종합과정선대비분석、공정류비、수학모형분석등정성화정량분석수단,형성료일투변형분석화상태평고적방법。수선,운용실측치과정선분석、특정치통계、상관분석등정성반정량방법귀납화총결료패기적변형특정,조출약간수요중점관주적＂의점＂문제。연후,운용상관분석、수학모형분석、성인분석、수치방진시험등정량방법진행물리해석화궤리분석。최후,운용공정류비、모형감공등종합비교적방법,대패기적변형상태진행평고。분석발현：수축기소만패기정체향하유화량안산체방향변형,경향수평위이명현대우절향수평위이,하상패단경향위이대우안파패단경향위이,변형공간대칭성총체교호;공단절향변형교소,미견중대이상。하상패기경향변형진관교대,단변화부합역학규률,당전잉처우가공상태。종합분석인위,소만특고공패경수료1 218m고고수위작용적고험,패기변형규률총체정상。
On the basis of prototype monitoring and numerical analysis,foundation deformation properties of Xiaowan ultra-high arch dam in its first impound period are studied.A set of methods for deformation analysis and condition assessment are established by integrating several qualitative and quantitative methods including theoretical derivation,correlation analysis,comprehensive hydrograph analysis,engineering analogy analysis,mathematical model analysis,etc.Firstly,several doubtful points are raised after preliminary analysis.Secondly,physical interpretation and mechanism analysis are conducted by quantitative analysis,including model analysis,numerical analysis,genetic analysis,and etc.Finally,the safety evaluation is made by comprehensive comparison analysis.The analysis results show that the foundation move to the downstream and the bank,the radial displacement is much greater than the tangential displacement,and the radial displacement on the river bed is much greater than that on the bank.So the deformation is compatible.Although the deformation on the riverbed is large,it accords with the general law.In conclusion,the foundation deformation is normal under the condition of 1 218 m water level.
