Transmission lines pass through various types of regions in China and some of that are corrosive. The foundation concrete of transmission lines in corrosive environments had shown serious deterioration, which usually caused by concrete deterioration, rebar corrosion, degradation of bond strength between rebar and concrete due to various corrosive effects. There are salt lake areas in west China where some power transmission channels pass through. Field tests are carried out in Golmud area to research the durability of foundation concrete of transmission lines. And test results show that the concrete strength in the air is higher than underground and the carbonation depth of the foundation concrete decreases with the increase of concrete compressive strength.

The in-situ tests of horizontal bearing capacity on inclined steel pipe piles were conducted in the sea near Shanghai. Based on the field experiment with the lateral unidirectional and single cycle loading test method, this document presents the horizontal displacement and bearing capacity on the inclined steel pipe piles with negative and positive inclination angles. And the horizontal bearing capacity of the steel pipe pile with positive inclination angle is larger than the one with negative inclination angle. And the tests results can be provided for similar engineering reference.

The concrete used in transmission lines are basically for foundations. The foundation concrete of transmission lines in corrosive environments has shown serious deterioration, which usually caused by concrete deterioration, rebar corrosion, degradation of bond strength between rebar and concrete due to various corrosive effects. Field tests are carried out in Wuhu area to research the durability of foundation concrete of transmission lines. And test results show that the concrete strength in the air is a litter higher than underground and the carbonization depth at the windward side is the largest of each foundation and the leeward side is the smallest, while those underground are close to zero.

The core drilling method is used for testing the concrete strength of the cast-in-place piles during the construction of a power plant. The concrete strength of some cast-in-place piles is far lower than the normal expected value. The incorrect construction sequence is the main cause of the quality problem. It is inadvisable to shorten the time limit for a project while ignoring the project quality. The more time will be spent to solve the quality problem of the project after the construction is complete. The construction organization is important for the quality of the projects and the reasonable construction sequence can improve the project quality.

Indoor model experiments were made to study loads on single pile under the wave-current flow. Take three different velocities of the current and three different diameters of piles in the experiments to get the variations of loads. Drag and lift forces were measured by a two-component balance. Analysis on experiment results shows that, both drag force and lift force increase with the increase of the pile diameter and the current velocity. The drag coefficient Cd increases with the increase of Kc number until Kc researches 12, when Kc is more than 12, Cd decreases with the increase of Kc; while the inertia force coefficient Cm decreases with the increase of Kc, when Kc is more than 12, Cmchanges little. And the lift coefficient shows no correlation with the Kc number.