Kỳ vĩ công trình Cầu vượt hồ Yên Mỹ nhìn từ trên cao

Mạnh Cường 15:04 13/05/2022

(Baothanhhoa.vn) - Với tổng chiều dài gần 1 km, cây cầu bắc qua lòng hồ Yên Mỹ (huyện Nông Cống, Thanh Hoá) được xem là cầu vượt hồ lớn nhất trên cao tốc Bắc – Nam. Các nhà thầu đang “ngày đêm” thi công công trình giao thông quan trọng và kỳ vĩ này.

Ố>ỞỜ@2ÙẩẩĨỚấẪ{ẫ2$ỚỒvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5Ố/>ỞỒỐấỜ@2ÙẩẩĨỚấủ$Ù#ỚỒỆằ{Ờẫã4<Ờ@>{,bỜ#Ủ{Ờ<Ý4ỜỞỜ13ÒỜ@XfỜ@ÝbỜỸỰ@ỜầbÙỜ274<Ờ>ạỜF:4ỜxìỜÕ>bf.4Ờyá4<Ờỗà4<ÒỜẪ>Ù4>Ờủ5ỤÔỜ=ẹẳ@Ờễ$3Ờ2ỦỜ@ÝbỜệẹẳẫỜ>ạỜ2ằ4Ờ4>YẫỜẫậ:4Ờ@Ù5Ờẫà@ỜổỰ@Ờ–ỜyÙ3ỌỜỗỤ@Ờ4>ỦỜẫ>ÝbỜ=Ù4<Ờ“4<ỦfỜ=:3”Ờẫ>{Ờ@á4<Ờ@á4<Ờẫậ[4>Ờ<{Ù5Ờẫ>á4<ỜầbÙ4Ờẫậ84<ỜệỦỜ1hỜệ Ờ4ỦfỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜRỢRấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQQSỞỞẫUÚQPÚ2ỢỌể$ỸấNậĨÚỠÚỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚRỢRỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ2ỦỜ@á4<Ờẫậ[4>Ờẫậ84<Ờ={!3Ờẫậ:4Ờẫbf;4Ờ@Ù5Ờẫà@ỜổỰ@Ờ-ỜyÙ3ỜầbÙỜễỨỜF:4ỜxìÒỜ>bf.4Ờyá4<Ờỗà4<ÒỜẫ"4>ỜẪ>Ù4>Ờủ5ỤỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỜ#ẫ>b3ỸỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜQQÚấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQQÚPÚẫRUỠỢP2ỢỌể$ỸấNậĨỞPỠỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚQQÚỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ@6Ờ@>{,bỜ#Ủ{ỜÚÚRÒU3Ờẫ>bả@Ờ<6{Ờẫ>ÝbỜỄwỢPỜ#5Ờ2{:4Ờ#Ù4>Ờỗá4<ỜẫfỜỗẤỜẪỲấỜ=5Ủ4ỜễXfỜ#ê4<Ờx{,4ỜẪậb4<ỜệỦỜẪã4<Ờ@á4<ỜẫfỜỗãỜấ>Ý4ỜễbYẫỜ4>ỲấỜ1>ỴbỜệỦỜễXfỜ#ê4<ỜỆ{.ẫỜyÙ3ỜÕỆ{4Ù@54$ễÔỜẫ>{Ờ@á4<ỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜQQÚấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQQUPỠẫRTỠQR2ỢỌể$ỸấNậĨUÚTỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚQQÚỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ@6Ờ@6Ờ<{ỤỜẫậ]ỜễXfỜ2ỰấỜỠQỢỜẫíỜ=ạ4<ỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜRUUấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQQURUẫỞTỠUR2ỢỌể$ỸấNậĨPỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚRUUỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ2ỦỜ3ảẫỜẫậ54<Ờ4>ề4<Ờ>Ũ4<Ờ3đ@Ờ@ÝbỜệẹẳẫỜ>ạỜ2ằ4Ờ4>YẫỜẫậ:4Ờẫbf;4Ờ@Ù5Ờẫà@ỜổỰ@Ờ-ỜyÙ3Ờ=5Ũ4Ờầbà@Ờ2ảỜQRỜ-Ờy<>{ỜẨắ4ỌỜẦbÙ4<Ờ@Ư4>Ờ1>bỜệê@Ờ4ỦfỜậYẫỜ=*ấÒỜẩÙbỜ1>{Ờ>5Ủ4Ờẫ>Ủ4>Ờẩ?Ờ2ỦỜ3ảẫỜ={!3Ờ4>Y4Ờ4ã{ỜỸỲẫỜẫậ:4Ờẫbf;4Ờ@Ù5Ờẫà@ỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜQQÚấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQQÚỠỞẫUỢỢỞỞ2ỢỌể$ỸấNậĨUPTỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚQQÚỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒỗXfỜ@ÝbỜ#dỜ=Ù4<Ờ=ẹẳ@Ờẫ>{Ờ@á4<Ờ4>ề4<Ờ=ỨỜ3Ù4<Ờệ&Ờ=*ấÒỜẩêỜ1hỜệ ỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜRPRấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQRỢỠRẫRUPRỞ2ỢỌể$ỸấNậĨỠỞRỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚRPRỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ@6ỜỠQỜẫậđÒỜỠỜ3àỜệỦỜỠRỜ4>]ấỜẨbấ$ậỜẪỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜQSRấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQRQỢỢẫỠQSỠS2ỢỌể$ỸấNậĨUTỠỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚQSRỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒỗỤ@Ờ4>ỦỜẫ>ÝbỜ=Ù4<ỜẫỲấỜẫậb4<Ờẫ>{Ờ@á4<Ờ@á4<Ờẫậ[4>Ờ@ÝbỜệẹẳẫỜ>ạỜF:4ỜxìỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜRỢRấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQRSỞÚẫQRỢÚU2ỢỌể$ỸấNậĨỞSTỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚRỢRỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒớXfỜ2ỦỜ@á4<Ờẫậ[4>Ờ<{Ù5Ờẫ>á4<Ờẫậ84<Ờ={!3ÒỜ2ỦỜ={!3Ờ4>Y4Ờ@eÙỜ@Ù5Ờẫà@ỜổỰ@Ờ-ỜyÙ3Ờ=5Ũ4ỜầbÙỜẫ"4>ỜẪ>Ù4>Ờủ6ÙỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấổ5#fỚỒỐ{3<Ờ@2ÙẩẩĨỚ{ỗ$4ẫ$ậỚỜẩẫf2$ĨỚể{#ẫ>OỜUỢỢấễÓỜ>${<>ẫOỜQQÚấễÓỚỜẩậ@ĨỚ//@Ọ#>@4Ọệ4/{3</#$ẩ1ẫ5ấ/#-ỸÙ5ẫ>Ù4>>5ÙỌệ4/4$ểẩ/ỠỠỞÚ/ỞSU#RỞQRPPỠẫÚÚTỢP2ỢỌể$ỸấNậĨSỞPỚỜÙ2ẫĨỚvhỜệ Ờ@á4<Ờẫậ[4>ỜỗÝbỜệẹẳẫỜ>ạỜF:4ỜxìỜ4>[4ỜẫẽỜẫậ:4Ờ@Ù5ỚỜể{#ẫ>ĨỚUỢỢỚỜ>${<>ẫĨỚQQÚỚỜ/ỒỐ/ấỒỐấỜ@2ÙẩẩĨỚấỗÙấẫ{54ỚỒỗá4<Ờẫậ[4>Ờ@ÝbỜF:4ỜxìỜẩÙbỜ1>{Ờ>5Ủ4Ờẫ>Ủ4>Ờẩ?Ờ2ỦỜ3ảẫỜẫậ54<Ờ4>ề4<Ờ@b4<Ờ=ẹặ4<Ờ=*ấÒỜ<{cấỜ>5Ủ4Ờẫ>{.4ỜầbfỜ>5Ũ@>Ờệ,Ờ3ỮẫỜ1{;4Ờẫậc@Ờ@eÙỜ1>bỜ#bỜ2]@>Ờẩ{4>Ờẫ>Ụ{Ờ>ạỜF:4ỜxìÒỜ<6ấỜấ>Ý4Ờẫ>c@Ờ=ÝfỜẩêỜấ>ỤẫỜẫậ{!4Ờ1{4>Ờẫ;Ờ-ỜễỨỜ>ả{Ờ@eÙỜ>bf.4Ờyá4<Ờỗà4<Ờ46{Ờậ{:4<ỜệỦỜẫ"4>ỜẪ>Ù4>Ờủ6ÙỜ46{Ờ@>b4<ỌỐ/ấỒỐấỜ@2ÙẩẩĨỚấịbẫ>5ậỚỒxŨ4>Ờỗẹặ4<Ố/ấỒ