發(fā)布時間：2019-04-13 12:13

【摘要】：成貴鐵路菜壩岷江特大橋主橋基礎(chǔ),結(jié)合地形、地質(zhì)特點,北岸河中岸灘采用高水頭筑島圍堰技術(shù),南岸水中墩采用石渣筑島后陸域靜壓植鋼板樁圍堰工法,河中墩采用棧橋+鋼平臺,水上靜壓植鋼板樁圍堰技術(shù),克服巖面侵入承臺、上覆卵石層等難題,承臺、墩身在一個枯水期完成,墩身漲水前施工過汛期防洪水位。鋼梁架設(shè)采用特制設(shè)備從兩邊向中間懸臂拼裝、跨中合龍施工技術(shù),修改航管軟件解決航空限高問題。鐵路道砟槽板采用場內(nèi)預(yù)制,架橋機(jī)安裝,梁上結(jié)合工藝技術(shù)。施工安全、優(yōu)質(zhì)、高效、環(huán)保。
[Abstract]:Based on the main bridge foundation of the Minjiang River Bridge, the middle bank of the north bank river adopts the technology of high water head to build the island cofferdam, and the middle pier of the south bank adopts the static pressure steel plate pile cofferdam construction method in the back land area of the island. The steel trestle platform and steel sheet pile cofferdam technology are adopted in the middle pier of the river to overcome the difficult problems such as the rock surface invading the cap and overlaying the cobblestone layer. The abutment and the pier body are completed in a dry water period. The flood control water level of the pier body is over before the flood season. Steel beam erection adopts special equipment to assemble from two sides to middle cantilever, construction technology of mid-span closure, and modification of air traffic control software to solve the problem of aviation height limit. The ballastless slot plate of railway track is prefabricated in the field, installed with bridge erecting machine, and combined with the technology on the beam. Construction safety, high quality, high efficiency, environmental protection.
【作者單位】： 中鐵大橋局集團(tuán)有限公司;
【基金】：中國中鐵科研項目(橋經(jīng)[2013]148號):成貴鐵路菜壩岷江特大橋大跨度鋼桁連續(xù)梁建造關(guān)鍵技術(shù)研究
【分類號】：U445.4
，

本文編號：2457546