摘要
在对既有桥梁水文检算时,需对检定流量、检定水位、壅水高度、冲刷深度等进行计算。计算公式多是依据桥梁建成以前的资料,运行一定时间的既有桥的河道、水文水力条件已经发生了变化,若仍采用建桥前的资料进行计算可能存在不完全适应的现象。本文以朔黄铁路133号磁河特大桥为例,在采用不同计算断面进行水文检算的基础上,结合桥址河段河床地形现状,计算磁河特大桥可能的最大冲刷深度,并通过对比分析受无序挖砂影响的桥梁计算断面对水文检算结果的影响。
Existing bridge hydrological rating contents include calculation of rating f low,rating stage,back-water height,scour depth,etc.The formulas were generally based on data collected before the bridges were built.River way,hydrological and hydraulic conditions would change when the bridges were in operation for some time.So it may be inapplicable using these data for calculation.Taking the No.133 Cihe river super long bridge passing through Shuozhou-Huanghuagang railway for example,the possible maximum scour depth of this bridge were calculated by selecting different riverbed sections and combining the present riverbed landform.By comparing calculation results,the inf luence of riverbed section selection on hydrological rating result was discussed for bridges affected by disorder sediment dredging.
作者
杨维一
王冬立
孟军涛
YANG Weiyi;WANG Dongli;MENG Juntao(China Academy of Railway Sciences,Beijing 100081,China;Beijing Tieke Engineering Detection Center,Beijing 100081,China;Shuohuang Railway Group Co.Ltd.,Suning Hebei 062350,China)
出处
《铁道建筑》
北大核心
2018年第3期146-150,共5页
Railway Engineering
关键词
桥梁
水文检算
河床断面选取
影响分析
冲刷深度
Bridge
Hydrological rating
Riverbed section selection
Inf luence analysis
Scour depth
