Numerical simulation of double-row pile-NPR anchor cable support based on ABAQUS

Abstract

With the development of urban architecture, research on deep foundation ditch support is of great significance. The current anchor cables used for foundation ditch support are all traditional steel materials, which have the disadvantages of high cost and serious waste. NPR (Negative Poisson's ratio effect) anchor cables have the characteristics of high strength, high toughness, and resistance to large deformation. Currently, they are widely used in tunnel support engineering, but research on deep foundation ditch support is rarely involved. Therefore, this article uses ABAQUS software to establish a numerical model of double row pile-NPR joint support to explore the effect of NPR anchor cables on deep foundation ditch support. Research has shown that: (1) The front piles share a larger soil pressure, while the rear anchor piles play a dual role in supporting soil and pulling anchors. (2) The NPR anchor cable increases the horizontal pull-out resistance of the double row pile support structure, limits the horizontal displacement of the support structure, and enables the foundation ditch to meet its deformation requirements, indicating that it can effectively support the foundation ditch.