Effect of Compaction Stresses on Performance of Back-to-Back Retaining Walls

Umashankar, B and Sravanam, Sasanka Mouli and Madhav, Madhira R (2017) Effect of Compaction Stresses on Performance of Back-to-Back Retaining Walls. In: Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul.

Preview

Text
issmge_2017.pdf
Download (1MB) | Preview

Abstract

Back-to-back reinforced soil retaining walls are commonly used for approach embankments of bridges and flyovers. Existing design guidelines (FHWA/BS/IS codes) do not provide a mechanistic approach to design back-to-back reinforced soil retaining walls. Lateral pressures on the facing and at end of reinforced zone are required for stability checks (both internal and external). During stage-wise construction of back-to-back walls, compaction stresses should be incorporated to obtain realistic lateral earth pressures on the walls. The present paper describes the effect of the compaction stresses on the lateral pressures in such reinforced soil retaining walls. The variation of lateral pressures at the end of reinforced zone along the depth of the wall is obtained from numerical modeling of back-to-back reinforced soil walls. A surcharge load of 30 kPa is applied at the end of the construction of the wall. It is observed that the effect of surcharge load is not significant after certain depth of the wall for lower spacing between walls to wall height ratios. A comparison on lateral pressures with and without compaction stresses for different distances between the ends of reinforcements of two walls is presented. Effect of connection of reinforcement is also studied.

[error in script]

IITH Creators: