关键词:

沉管预制, 全断面模板台车, 三角型桁架, 自行走系统, 无拉杆外模, 梳齿型端模

Abstract: The prefabrication of immersed tube in stages always has long construction term and greater risk of water seepage at longitudinal construction joints, while  for integral fullsection prefabrication, it is difficult to meet the requirements of fullface prefabrication quality and schedule with conventional steelwood mixed formwork system. To solve these problems, a fullsection hydraulic formwork trolley with selfwalking function is developed. The inner formwork trolley adopts triangular truss structure and hydraulic crawlertype selfpropelled system to realize rapid shift. The outer formwork trolley adopts inclined support truss without tie rod to reduce the risk of water seepage. The end formwork adopts combtooth type composite steel to increase turnover utilization rate. Meanwhile, the outer formwork trolley is helpful for system conversion and saving construction period. Finally, the finite element ANSYS is used to simulate and calculate the deformation and displacement of formwork in the process of concrete pouring. The practice results show that the formwork trolley used can guarantee successful prefabrication in fullsection of immersed tunnel segment and concrete pouring safety.

Key words: immersed tunnel segment prefabrication, fullsection formwork trolley, triangle truss, hydraulic selfpropelled system, outer formwork without tie rod, combshaped steel end mould