Stability Investigation of Contiguous Replacement Piles.

Abstract

Urbanization leads to increase lands cost which resulted in the construction of high towering vertically toward the sky and use underground for construction. Foundations of these structures need deep excavation. Anti-slide piles are a suitable option for excavation stability, which involves bored cast-in-place piles constructed along the line of the excavation as a retaining structure using closely bored piles. There is a gap between two individual piles. For this purpose, an experimental study on anti-sliding piles was investigated, For further investigation of contiguous pile system, and their behavior under different soil types, and to study the effect of embedment ratio and relative density on lateral displacement of the contiguous pile. Physical scale model tests were performed to investigate the effect of the fine-grained soils, coarse-grained soils, various embedment ratios, and density on the lateral displacement. The test results showed that lean clay (CL) soil is more stable to resist lateral displacement induced by inter-particle cohesion. Increasing the embedding ratio significantly reduced the lateral displacement, and with increasing backfill density of sandy soil for high embedment ratio the lateral displacement noticeably decreased, while for the low value of embedment ratio the lateral displacement increase with increase backfill density.

Keywords

• anti-slide pile
• physical model test
• embedment depth
• lateral displacement