Research On Quickly Filling Scheme Of Stacking Structure And Mechanical Characteristics Of Components

Based on the large packing demand and long construction period of current sea reclamation project, a new way of filling sea is explored in this article. By throwing a lot of precast reinforced concrete structures which can penetrate and clamp with each other, the land will appear after accumulated components above the water. The wood-models of four kinds of concrete structures are designed and made. These models are box models, long tetrapods, short tetrapods and straight rods. At first, nine filling schemes are determined according to a lot of filling test using models. The long tetrapods are the underlying component and the number of the rest of three kinds components in each layer are different of every scheme. After successive filling according to the nine schemes, the curves of load and settlement of every scheme are obtained by using the static load test of each stacking structure. After the analysis of the unit settlement of each structure by using the data processing method of orthogonal experiment, the optimal filling scheme is obtained. And then, four kinds of models are filled according to the optimal scheme. After the filling, the positions and the sources of the force on each component are recorded. According to the analysis of frequency by using mathematical statistics method, the mechanical characteristics of every component are studied. Finally, the relationships between the force direction and the maximum tensile stress of each component are explored preliminary by using the finite element software ABAQUS. Main results achieved are as follows:(1) Among the nine filling schemes, the scheme which the straight rod models are filled at both second and third layer uniformly is the best. Straight rods can connect and clamp box models, which is conducive to reducing settlement.(2) The position of force on the edge of the box model is most possible at the near 1/7 of the whole edge, while the position of force on the surface is most possible at the midpoint of the edge of square hole which is at the middle of the outside surface. The positions of force on the cylindrical bar of short tetrapod and long tetrapod are most likely near the top of the bar. The position of force on straight rod is most likely near the bottom of straight rod.(3) The sources of the force on the edges of box models are mainly box models and short tetrapods, while the surfaces of box models are mainly short tetrapods and straight rods. The source of the force on the short tetrapod is mainly the box model. The sources of the force on straight rod and long tetrapod are mainly box models and ground.(4) According to the calculation results of finite element software, it is founded that the force direction has a little influence on the maximum tensile stress of the box model. But the force direction has a great influence on the maximum tensile stress of short tetrapod, straight rod and long tetrapod.