三九養(yǎng)生堂記者 鄧肯·蓋伊 報道
精彩| 杭??(hang)州??(zhou)灣??(wan)跨??(kua)海??(hai)鐵??(tie)路??(lu)橋??(qiao)是??(shi)南??(nan)通??(tong)至??(zhi)寧??(ning)波??(bo)高??(gao)鐵??(tie)關(guān)??(guan)鍵??(jian)控??(kong)制??(zhi)性??(xing)工??(gong)程??(cheng)??，采??(cai)用??(yong)無??(wu)砟?(zha)軌??(gui)道??(dao)??，設(shè)??(she)計??(ji)時??(shi)速??(su)350公??(gong)里??(li)??，全??(quan)長??(chang)29.2公??(gong)里??(li)??，共??(gong)有??(you)北??(bei)、中??(zhong)、南??(nan)三??(san)座??(zuo)航??(hang)道??(dao)橋??(qiao)和?(he)跨??(kua)大??(da)堤??(di)、海??(hai)中??(zhong)、淺??(qian)灘??(tan)區(qū)??(qu)引??(yin)橋??(qiao)??，屬??(shu)超??(chao)長??(chang)大??(da)的??(de)高??(gao)速??(su)鐵??(tie)路??(lu)橋??(qiao)梁??(liang)集??(ji)群??(qun)工??(gong)程??(cheng)?。??其??(qi)中??(zhong)北??(bei)航??(hang)道??(dao)橋??(qiao)主??(zhu)跨??(kua)為??(wei)450米??(mi)??，是??(shi)世??(shi)界??(jie)最??(zui)大??(da)跨??(kua)度??(du)無??(wu)砟??(zha)軌??(gui)道??(dao)雙??(shuang)塔??(ta)雙??(shuang)索?(suo)面??(mian)鋼??(gang)箱?(xiang)-鋼??(gang)桁??(heng)組??(zu)合??(he)梁??(liang)斜??(xie)拉??(la)橋??(qiao)；中??(zhong)航??(hang)道??(dao)橋??(qiao)主??(zhu)跨??(kua)為??(wei)2×448米??(mi)??，為??(wei)世??(shi)界?(jie)最??(zui)大??(da)跨??(kua)度?(du)無??(wu)砟??(zha)軌??(gui)道??(dao)三??(san)塔??(ta)斜??(xie)拉??(la)橋??(qiao)；南??(nan)航??(hang)道??(dao)橋??(qiao)主??(zhu)跨??(kua)為??(wei)364米??(mi)??！ ?號??(hao)墩?(dun)所??(suo)處??(chu)海??(hai)域??(yu)地??(di)質(zhì)??(zhi)條?(tiao)件??(jian)復(fù)??(fu)雜??(za)??，成??(cheng)孔??(kong)及??(ji)成??(cheng)樁??(zhuang)難??(nan)度??(du)大??(da)??。??中??(zhong)鐵??(tie)大??(da)橋??(qiao)局??(ju)研??(yan)制??(zhi)了??(le)最??(zui)大??(da)鉆??(zuan)孔??(kong)直??(zhi)徑??(jing)4.5米??(mi)、鉆??(zuan)孔??(kong)深??(shen)度??(du)可??(ke)達(dá)??(da)155米??(mi)的??(de)SWDM800大??(da)型??(xing)旋??(xuan)挖?(wa)鉆??(zuan)機(jī)??(ji)??，與??(yu)XR580旋??(xuan)挖??(wa)鉆??(zuan)機(jī)??(ji)接??(jie)力??(li)鉆??(zuan)進(jìn)?(jin)成??(cheng)孔??(kong)??，并?(bing)配??(pei)備??(bei)相??(xiang)應(yīng)??(ying)的??(de)成??(cheng)孔??(kong)設(shè)??(she)備??(bei)??。同??(tong)時?(shi)優(yōu)??(you)化??(hua)施??(shi)工??(gong)工?(gong)序??(xu)??，采??(cai)用??(yong)主??(zhu)籠??(long)、導(dǎo)??(dao)管??(guan)提??(ti)前??(qian)在?(zai)相??(xiang)鄰??(lin)孔?(kong)預(yù)??(yu)拼??(pin)到??(dao)位??(wei)等??(deng)方??(fang)式??(shi)??，節(jié)??(jie)省??(sheng)了??(le)鋼??(gang)筋??(jin)籠??(long)和??(he)導(dǎo)??(dao)管??(guan)下??(xia)放??(fang)、拼??(pin)接??(jie)時??(shi)間??(jian)??，極??(ji)大??(da)地??(di)提??(ti)高??(gao)了??(le)施??(shi)工??(gong)效??(xiao)率??(lv)??。
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