Papers by Keyword: Construction Process

Abstract: Steel tubular scaffold with couplers formwork support is a key item in construction，there are accidents. Some actual problems of the construction scheme in drafting, examination and construction process were analyzed. The solutions in thinking and measures are put forward, the execution of the technical and organizational management is the key to security problem.

Abstract: There were many factors which caused cracks in the concrete beam, but some factors were often not be attention enough. In this paper, Combined with three kinds of crack occurrence in construction of concrete plate, the reasons leading to crack by construction technology were analyzed in detail, which including the construction process, curing conditions and controls of cover thickness, and the solution were given also. The result of analysis had guiding roles of crack controlling in concrete structure construction.

Abstract: Frame - shear wall structural system are widely used in high-rise buildings . During the construction period , a different pressure than due to the loads and their respective axis , resulting in the existence of vertical deformation of the difference between the components , this difference will frame - shear wall structure beams internal forces have an important impact . The existence of concrete creep and shrinkage , so that the impact of further increase . A frame - shear wall structure high-rise buildings for the analysis object , using the finite element method , and analyze the impact of contraction of the construction process of concrete creep frame - shear wall structure of the vertical deformation and internal forces , a number of recommendations for the rationalization for structural analysis and design practical , in order to service engineering

Abstract: Construction process design for high-rise building has been brought up by many researchers. In traditional design method, loads are applied to the structure once. Obviously, this is not the real loading condition. For concrete structure, shrinkage and creep during construction also effects on the structural deformation. An emulation analysis was done in this paper in an attempt to clarify the effect of construction process in structural analysis.

Abstract: Kunming dian chi lake to pick to: the main southern culvert-pipe CFG pile composite foundation, illustrates the application of CFG pile mechanism, design calculation, construction process and the detection principle and its application effect is analyzed.

Abstract: Cable is widely used in the actual project of prestressed steel structure for its mechanical properties can be fully used. Saddle-shaped cable net is a new type of large-span prestressed structure, but there is little study on the impact of different cable types on the mechanical properties of saddle-shaped cable net during the construction. In order to meet the thought of integration of design and construction, a finite element model of saddle-shaped cable net has been established. The four types of cables such as semi-parallel steel tendon cable, steel wire rope cable, steel strand cable and full-locked coil rope are chosen. The impact on mechanical properties of the structure was analyzed by different cable types.

Abstract: Abstract. The structure, construction method, process theory, technical requirements and economic analysis of pasted dovetail board XPS board are described by taking the engineering case analysis as examples. Compared with the existing external wall insulation board, the technology is characterized by excellent insulation effect, less product auxiliary materials, easy recognition on the quality of auxiliary materials, simpler and more convenient construction, and construction period and cost-saving. The construction technology of the external wall external insulation of pasted dovetail groove XPS board is energy-conservation, eco-friendly and has remarkable efficiency. It can be widely promoted and used in the external wall external insulation project which requires energy-conservation.

Abstract: A new type of steel / reinforced concrete composite open-web floor / roof structure is proposed. Its formation is a two-way intersectant open-web beam plate. The lower layer is a rib lattice that is composed of U-style steel slabs infilled with RC, the upper layer is assembled with pre-cast RC slabs and post-cast RC ribs, the connections of upper layer and lower layer are RC shear-bearing blocks. The plate has the specialties of lightweight, simple inside sight sense, high stiffness-weight ratio, and less seismic inertial force. Its formation, construction process, design method and main mechanical specialties are discussed.

Abstract: Based on a practical engineering, considering the characteristics such as shallow,weaking surrounding rock, large span, double-arch of the tunnel, the stress and strain of surrounding rocks, support structure and mid-wall were analyzed by FEM for different excavating procedure. The simulation results were compared with in-situ monitoring results. The crown settlement and convergence displacement are divided two obvious increasing stages. Surrounding rock upper and under the mid-wall generate bigger plastic strain and should be strengthened. Temporary support of the pilot bears bigger load and should be reinforced. Bearing bigger horizontal direction tensile stress and uneven load, the bottom of mid-wall must have enough reinforcing steel bar or employ augment foundation. The analysis results provide a scientific basis and technical guidance for the construction optimization of the tunnel constructed by three-pilot excavation method.

Abstract: The bench method dynamic construction process of Xin Baotashan tunnel which located in the grade IV surrounding rock is simulated by using the finite element method. The variation of displacement and stress field of the surrounding rocks and the internal force of the lining structures during every excavation step is calculated. The state of the surrounding rocks can be predicted by the numerical simulation results, and the construction plan and construction sequences can be guided by the analysis results. At the same time the reasonability and feasibility of the design parameters can be judged by analyzing the internal forces of the lining structures. Analysis and experimental results showed that the stability of the surrounding rocks is good by using the bench method construction to the IV grade surrounding rocks and the design parameters of the lining structures are feasible.