Prestress Loss Model and Experimental Study of Anchor Cables in Soft Soil Area: Fid-Bau Portal

Prestress Loss Model and Experimental Study of Anchor Cables in Soft Soil Area

He, Zhi Yu / Xin, An

Prestressed anchor cables have been widely used in geotechnical engineering. Correct understanding of prestress loss law is crucial to the design of anchorage supporting, anchorage effects, safety and long-term stability of a whole project. The main focus of this paper is to present a new model and calculation formula for the analysis of prestress loss in soft soils. This model is based on consideration of the coupling effect of anchor cable and soil, and the physical meaning of the two parameters in the formula is investigated, i.e., D1 represents the total amount of prestress loss, the greater value of D1, the less total amount of prestress loss. D2 represents the variation rate of prestress loss of anchor cables, the greater value of D2, the greater variation rate of prestress loss. By applying this prestress loss calculation formula to the analysis of prestress loss law in practice, the analytical results turn out to be nice and accurate. This model explains the prestress loss mechanism in essence and provides a solution to analyze prestress loss characteristics of anchor cables in soft soil area. Meanwhile, the formula can be adopted to forecast the prestress loss of anchor cables at certain time in anchorage engineering in soft soil regions.