人民长江
人民長江
인민장강
YANGTZE RIVER
2014年
5期
92-94
,共3页
黄如卉%梁东业%李艳萍%李中田%马玉民
黃如卉%樑東業%李豔萍%李中田%馬玉民
황여훼%량동업%리염평%리중전%마옥민
车激振动%砂土液化%公路桥%堤防
車激振動%砂土液化%公路橋%隄防
차격진동%사토액화%공로교%제방
vehicle-induced vibration%liquefaction of silt%highway bridge%dike
一公路桥桥墩位于河岸堤防附近,当车辆快速通过凹凸不平的桥面时,桥梁会产生振动,且该振动作用可能会导致桥墩周围的松散饱和粉细砂层发生液化。针对上述问题,采用有限元二维动力方法对车激振动作用下堤基饱和砂土的液化特征进行了分析。结果表明,由桥面不平顺导致的桥墩基础砂土液化范围很小,基本位于墩周附近的上部松散-稍密饱和粉细砂层内,不会对桥梁和堤防的安全产生不利影响。
一公路橋橋墩位于河岸隄防附近,噹車輛快速通過凹凸不平的橋麵時,橋樑會產生振動,且該振動作用可能會導緻橋墩週圍的鬆散飽和粉細砂層髮生液化。針對上述問題,採用有限元二維動力方法對車激振動作用下隄基飽和砂土的液化特徵進行瞭分析。結果錶明,由橋麵不平順導緻的橋墩基礎砂土液化範圍很小,基本位于墩週附近的上部鬆散-稍密飽和粉細砂層內,不會對橋樑和隄防的安全產生不利影響。
일공로교교돈위우하안제방부근,당차량쾌속통과요철불평적교면시,교량회산생진동,차해진동작용가능회도치교돈주위적송산포화분세사층발생액화。침대상술문제,채용유한원이유동력방법대차격진동작용하제기포화사토적액화특정진행료분석。결과표명,유교면불평순도치적교돈기출사토액화범위흔소,기본위우돈주부근적상부송산-초밀포화분세사층내,불회대교량화제방적안전산생불리영향。
A bridge pier is adjacently located at a bank embankment, the bridge vibration induced by vehicle running on the uneven bridge deck would transfer to the piers and may further lead to liquefaction of the dike foundation that consist of saturated loose fine silt. Aiming at the potential dangers, we carry out a liquefaction analysis for the saturated loose silt under vehicle-in-duced vibration by 2D FEM. The calculation results show that the liquefaction potential of dike foundation arising from bridge deck vibration is slight and the limited liquefaction layer, mainly compose of saturated fine silt with loose and compacted features, is mostly around the piers. The vehicle-induced vibration would not exert unfavorable influence on the bridge and dike.