Document Type : Research Article
Authors
1
Masters student, Department of Civil Engineering, Faculty of Engineering, Qom University of Technology, Qom, Iran.
2
Assistant Professor, Civil Engineering Depatrment, Faculty of Engineering, Qom University of Technology, Qom, Iran
3
Assistant Professor, Department of Civil Engineering, Faculty of Engineering, Qom University of Technology, Qom, Iran
Abstract
With the increase of high-rise construction and the use of underground transportation in urban environments, the need to use deep Excavation is felt more and more, and the use of a sheet pile wall is one of the practical methods for stabilizing these Excavation. The use of a mixture of sand and tire chips in the embankment of sheet pile walls with different depths, can have different effects on the lateral displacement and maximum bending moment of the double-anchored sheet pile wall, so in this research, using the characteristics of sandy soil and tire chips with volume ratios of 15 and 30%, the effects of using this mixture in the embankment were investigated in static and pseudo-static conditions by means of different horizontal seismic coefficients for walls with different heights. It was observed that in static conditions, the use of a mixture of sand and tire chips in the embankment of the wall, instead of full sand embankment leads to a reduction in the lateral displacement and the bending moment of the sheet pile. The lateral displacement and bending moment in the sheet pile, with the increase of the horizontal seismic acceleration coefficient, has shown an increasing trend, but in a constant horizontal seismic acceleration coefficient, by using a mixture of sand and tire chips, the obtained values have decreased, in the meantime, the performance of the mixture with a volume ratio of 30% was better than the performance of the mixture with a volume ratio of 15%. Also, the use of soil reinforced with tire chips, due to the reduction of the bending moment in the sheet pile, leads to a more economical plan for the seismic design of the sheet pile wall. In overall using tire shreds reinforces the backfill and finally decrease the vertical and also horizontal displacement. This result can be expanded to moments. Obtained results show that reinforcing loose sand can reach to an economical design for retaining walls. It is very important in dynamic analysis and design of these retaining structures. This valuable result can be achieve in both static and pseudo static designs.
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