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貴畢公路“換新顏”

2018-12-19 08:12來(lái)源：新華網(wǎng)


“川藏第一橋”如何煉成

塔頂距大渡河水面３６４米，橋面距大渡河水面２３９米；最大瞬時(shí)風(fēng)速達３２．６米／秒，相當于１２級臺風(fēng)，且風(fēng)場(chǎng)紊亂。如何保證施工安全？


雅康高速工程建設人員告訴記者，首先是創(chuàng )新設計施工工藝，增加了纜索吊裝系統主繩抗風(fēng)穩定性，采用防扭轉鋼繩等。


同時(shí)，施工時(shí)間由大數據分析確定。根據近５年的風(fēng)場(chǎng)數據，找準風(fēng)場(chǎng)規律，確定有效施工時(shí)間為早上６時(shí)－７時(shí)開(kāi)始起吊，１２時(shí)前完成全部吊裝作業(yè)。此外，增設了視頻和音頻監控系統，提升作業(yè)人員的規范性。


全橋需要擰高強螺栓５８２５５４套，擰完后４－２４小時(shí)內還要抽檢，不合標準的全部作廢處理。


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[責任編輯：李曉蕾]

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