中国港湾建设
中國港灣建設
중국항만건설
CHINA HARBOUR ENGINEERING
2015年
7期
4-7
,共4页
节段式%预制沉管%顶推系统%比选%优化
節段式%預製沉管%頂推繫統%比選%優化
절단식%예제침관%정추계통%비선%우화
sectional%prefabricated immersed tube%pushing system%comparison%optimization
节段式预制沉管在顶推过程中各节段间无钢筋或预应力钢绞线连接，容易对节段间剪力键混凝土造成损伤，对顶推设备和顶推同步性要求极高。通过对多种顶推方案的比选，港珠澳大桥岛隧工程预制沉管纵向移动选用了多点步距式顶推技术，并在顶推施工中对顶推系统进行了一系列的优化，保证了预制沉管顶推的安全和效率。
節段式預製沉管在頂推過程中各節段間無鋼觔或預應力鋼絞線連接，容易對節段間剪力鍵混凝土造成損傷，對頂推設備和頂推同步性要求極高。通過對多種頂推方案的比選，港珠澳大橋島隧工程預製沉管縱嚮移動選用瞭多點步距式頂推技術，併在頂推施工中對頂推繫統進行瞭一繫列的優化，保證瞭預製沉管頂推的安全和效率。
절단식예제침관재정추과정중각절단간무강근혹예응력강교선련접，용역대절단간전력건혼응토조성손상，대정추설비화정추동보성요구겁고。통과대다충정추방안적비선，항주오대교도수공정예제침관종향이동선용료다점보거식정추기술，병재정추시공중대정추계통진행료일계렬적우화，보증료예제침관정추적안전화효솔。
In the pushing process of sectional prefabricated immersed tube, no steel bar or prestressed steel strand connection between the various segments, it is easy to damage the shear connector in joint segment, and the requirements of pusher equipment and push synchronization are very high. Through a variety of pushing scheme comparison, we selected the multi-point interval type pusher technology for the prefabricated immersed tube longitudinal move in the Hongkong-Zhuhai-Macao Bridge island and tunnel project, conducted a series of optimization for the pushing system during pushing construction, and ensured the pushing safety and efficiency of prefabricated immersed tube.
