Study On The Optimum Design And Application Of Gravity Retaining Wall With Balancing Platform In Highway

With the fast pace of highway construction in our country especially in the western districts, retaining walls are getting used widely and largely. As the balancing platform tends to make the barycenter move backward, a more balancing stress distribution under the wall, a higher and steadier wall can be achieved. Furthermore, the resupine back of the downward wall not only works reasonably, but also can reduce the amount of excavation and filling obviously. So gravity retaining walls with balancing platform are applied heavily. However, the routine design is characterized by vast and repeated calculation, and difficult in finding an economic and sound design. And the existing CAD programs are mostly limited to earth pressure calculation and design of gravity retaining wall. Consequently, the optimum design of gravity retaining walls with balancing platform are of great engineering significances and potential economic effect.Based on the known theoretical research at home and abroad, common theories of earth pressure and their adaptabilities are discussed in this paper, and emphases are put on the methods of earth pressure calculation and checking of strength and stability for retaining walls with balancing platform, especially under the condition of cohesive filling soil and over loading. Then, combined with the accumulated experiences, proceedings to be paid attention during design and construction and the necessities of optimum design as a result of the shortcomings for common design are pointed out for the walls. According to an analysis of the current various optimum methods, a new mixed type of genetic algorithm are proposed, which overcomes some typical limitations such as the decrease of hunting efficiency lack of hunting competence near the optimal solution. With a model for optimum design setup, the system BRWCAD are worked out with the advanced language Visual Basic6.0 and the object-oriented technique. By applying the system to the design of an engineering project, the comparison of results of optimum design with that of routine design shows that the test results are reasonable and economic.