When using double shield tunnel boring machine(TBM)for excavation construction,TBM stepping and starting is one of the very important links.Due to the constraints of various unfavorable factors such as the spatial conditions,topographic and geological conditions of the construction site,and the limitations of the structural characteristics of the TBM itself,how to realize the rapid stepping and starting of the TBM is an important issue in tunnel construction.Taking the Kaliwa Dam project in the Philippines as an example,the authors analyze and discuss the design length of the TBM step starting tunnel section.By adopting the method of TBM split assembly and debugging,stepping by rail clamp and starting by circular reaction frame,it takes only four days to complete the TBM stepping and starting,and achieves the purpose of TBM fast stepping and starting,and provides valuable reference for the stepping and starting of similar TBM projects.
维普
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