The Bearing Characteristics Of Expansion Foundation Used In Overhead Transmission Line And Its Influencing Factors Of Crack Propagation

The expansion foundation used in transmission lines is widely used as a basis for the type, but also form the basis of the earlier application. Expansion of the foundation of conventional design basis generally considered the ultimate bearing capacity, and the cracking of concrete is not designed to control conditions, but in saline soil, coastal foundation soil on the steel corrosion, cracks will be based adversely affect bearing performance. However, there is no mature sound design theory and method of calculation or the more intuitive methods of observation to monitor the crack, therefore, the expansion foundation faced in the combination of uplift and stress under load and the crack needs to be further in-depth study in order to meet the engineering needs.In this paper, laboratory experiments and numerical simulation of the combination of methods to analyze the expansion foundation in the combination of uplift bearing loads and crack propagation law of my main conclusions are as follows:1.Using intelligent control load system and the corresponding surface displacement measurement method, obtained the foundation's Q ~ S curve.2. By comparing the same foundations in the same geological conditions, the basis of the reinforcement, different load stress and strain, stress and strain of the base. Study obtained the foundation load transfer mechanism.3. According to the orthogonal design of experiments using ANSYS finite element model, were calculated by the method of experimental design. Stress analysis of their basic cloud and fissure maps, drawn the key factor of the foundation crack affect. For practical engineering reference.