Earth pressure distribution and influencing factors for gravity anchorage foundations in clay

Centrifuge model tests are conducted on a gravity anchorage foundation embedded in a clay soil foundation, and a three-dimensional analysis model is established using the finite element software. The main factors affecting the anchor block's loading are analyzed, and the distribution and variation patterns of the earth pressure on both sides of the anchor block under different loadings are investigated. Results show that under the tension of the main cable, the passive earth pressure on the anchor block's passive side increases with depth and then decreases, while the active earth pressure on the active side shows a curved distribution. Increasing the base friction coefficient can effectively control the displacement of the anchor block, where as the internal friction angle of the soil had a limited impact on the stress distribution on both sides of the anchor block. The study aims to reasonably consider the influence of the surrounding soil on the anchor block to improve engineering economic efficiency and structural design, and can a reference for the theoretical analysis and practical engineering of gravity anchor foundations.