Problems such as head rising, head firming or deviated direction often occur during bridge and culvert construction with jacking method.

 
  • 橋涵頂進(jìn)施工中常出現抬頭、扎頭或方向偏差等問(wèn)題,對此除應加強觀(guān)測、認真預防外,還必須及時(shí)糾偏。
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