Abstract: According to the Winkler assumption, the form of the pile constraint could be simplified as bottom fixing and top free. Considering the influence from resistance of soil around pile, the equations on calculated length for buckling stability of steel pipe pile when the portions along the pile length were constrained in the uniform foundation and the layered foundation were respectively...

The mechanism of pile-soil reaction in frozen ground is not clear at present, but it obvious that the reduction dead weight will be beneficial to seismic resistance bridges. In view limited bridge engineering practice high risk permafrost regions, paper addressed structural performance superstructure and its effect on piles these special regions. Four superstructures with different weights were...

Socket connection need a groove reserved in the cap to accommodate bridge pier, which greatly weaken vertical bearing capacity of cap. The conventional treatment measure is increase thickness cap, and corresponding cost will increase. measures enhance socket caps without increasing were discussed this paper, including rough interface at bottom additional hanging bars, high-strength grouting mat...

The square cap is a typical semi-submersible component of sea-crossing bridges, which connects piers and pile-group foundations. As the size large, it usually has non-negligible influence on wave motion around foundation, so not considered in relevant specification. However, neglecting this may have adverse effects structure. In paper, forces capped pile groups are simulated by numerical flume....

In theory, the balance point position of O-cell pile test is determined and unique, load box should be located at this point. But in practical projects, it difficult to determine accurately. The foundation Qilu Yellow River Approach Bridge bears a large load. order reduce risk caused by test, double technology adopted project. According design, soil properties loading sequence, bearing capacity...