Research On Key Technology Of The Movable Scaffolding System For The Weihe River Super Large Bridge

As a new type of technology in construction, the movable scaffolding system(Mss)has been more and more widely used. according to the mold base support in different ways, the Mss is divided into uplink and downlink are two types of as an automated can be of a higher degree of self-moving construction machinery site pouring concrete beams, the movable frame without cross between the set with full framing, without the need for ground treatment, to provide sufficient construction plane, reducing the construction space overlap, reducing the insecurity complete sets of templates, steel, concrete and tension in the mold to improve the construction process the degree of standardization, process cycle is cyclical, reduce labor intensity and beam construction status and operation of working conditions. The study background of this paper is the Weihe river super large bridge of Contract No.3of the Rongcheng-Wuhai Highway in Changyi, highlighting the case in conjunction with the FoShan NanHai Heli Chuangxing Co., Ltd. completed in cooperation with the mobile mold in limited space conditions selection and design, the construction process of review of the design process, move the mold manufacturing, site installation and commissioning; movable frame structure deformation, internal forces and stability check of the calculation; machine after installation load test pre-camber settings; from steel processing, concrete pouring, prestressed construction, stripping, moving mode via process described beam technology and process of bridge-building mechanism, the formation of a complete set of mobile mold process. The main advantage of the moving mode:traditional mobile mold system changed by a two-way outside the three-way divection, to reduce the relocation space, and relocation without additional weight;-by-hole construction improvements for the two hole construction; longer hydraulic pump management and hydraulic pump station, shared two sets of joists; seams boom lifting and jack lifting process, reduce the dislocation; the structure of the medial flange template and mold can be flipped over hole smooth to avoid another one has been poured to complete the wing; the middle of beam variable cross-section structure, pier cap beam at the small cross section, to avoid the interference with the coping. Practice has proved that the Weihe river super large bridge construction with movable frame technology to ensure the quality of the project, and to accelerate the progress achieved good economic and social benefits, the moving mode, specially designed for the Wei River Bridge, transitions for other beach, water lots the same type of bridge construction, adjust the main beam between the distance and template backwater height to adapt to the geometric dimensions similar to the beam segment pouring equipment versatility, with a certain reference to the same type of bridge construction。...