Study On The Design Method For Grillage Supporting Structure With Prestressed Anchor Based On Stability

There are many kinds of supporting structure in civil engineering. The costs of traditional supporting structures such as gravity retaining wall, counterweight retaining wall, cantilever retaining wall, buttressed retaining wall and lump stone are relatively high and the area of plough occupied is large. What's more, it is impracticable to using those traditional technologies when the retaining wall height is large. With the economic development of our country, it is necessary for us to study the theory of supporting structure in detail in order to obtain rational supporting structure types, which is not only of important theoretical significance, but also of great practical significance.Frame supporting structure with prestressed anchor is a kind of light supporting structure developed in recent years. This structure has many advantages such as simple construction method, low cost and so on. So it has been more widely used in slope engineering, their analysis in terms of theory and design is not yet ripe and perfect. To solve those problems, the method based on stability design for the frame supporting structure with prestressed anchor is analyzed in this paper. The study contents are as follows:As stability failure is the main failure model of frame supporting structure with prestressed anchor, and soil pressure distribution is pretty complex. This paper discards the structural design method by solving soil pressure but chooses to adopt a structure design based on stability.In addition, a new model for the solution of stability factor is proposed in this paper. The function for the solution of anchored force is obtained by the relationship between stability factor and anchored force. The element matrix for frame structure is derived, and the internal forces of frame structure are worked out by using the elastic foundation beam principle. Then framework design can be carried on. The program of the design and calculation of frame supporting structure with prestressed anchor is written with the language MATLAB. If the relevant design parameters and soil parameters are known, the anchored force and internal forces of frame required in the design flow can be obtained by using this program, without considering the stability of the structure, and the time used in trial calculation design repeatedly is saved.In order to check the rationality and correctness of the above program, a project example is introduced in the next part. The comparison between the results of programdesign and those of practical design indicates that the calculating model is rational. The design methods are simple but utility, and the program is proved to be feasible, which will give some enlightenment to the future projects.The analysis, calculation and research ideology used in this paper can be extended and applied to other regions with different soil features or other forms of supporting structure.