Static pile load test to failure is the ultimate procedure available to examine the capacity and integrity of deep foundations. Being expensive and time consuming, the procedure is often substituted for the application of a load to a certain factor (most often two) times the contemplated design load. In fact, only a proof test is carried out while the ultimate capacity and actual factors of saf...

Estimating pile group efficiency for open-ended steel piles in small arrangements is a challenging task designers. This paper reports on the large-scale experimental campaign performed BorWin gamma offshore converter platform, which involved single and two-pile systems scale of 1:10. The works included installation, dynamic end-of-driving tests, restrike static load tests pair groups densely co...

This study presents an analytical framework to estimate the change in ultimate bearing capacity of energy piles unsaturated fine-grained soils under drained mechanical loading conditions after heating. The was developed by extending conventional methods for temperature-dependent conditions, where thermally induced changes characteristics soil and soil–pile interface are considered. Specifically...

Comprehensive geotechnical modelling of the behaviour of piles generally encounters setbacks: in preparing model bed simulating field conditions, of specific and uniform shear strength, and reproduction for repetitions. Due to such limitations in traditional practices, information on the complex mechanism of shaft-base resistance interaction is not adequately known. Other outcomes are: varied r...

Pile base resistance is an important part of the ultimate bearing capacity, and soil within a certain range above below pile end contributes to resistance. In general, calculated according average value strength in current calculating method, so it very determine influence Based on parameters results cone penetration test LiuHua 11-1 site South China Sea, difference by different methods, regula...

The effects and vertical bearing capacity of two jacked piles in sand are still not well understood, the mechanism adjacent pile’s uplift caused by jacking pile a double system is especially unclear, but these facets important to stability pile. In this paper, series tests performed on model sand, where influences length driving speed were studied. results revealed that mainly relation influenc...

in the realistic manner, piles are similar to the slender columns that soil around them acts as a lateral support. the piles situated in the liquefiable soil layers, loss their lateral supports due to the liquefaction resulted from the seismic ground motion. in this case, pile has the potency of axial instability similar to the unsupported columns. this instability can lead to the lateral buckl...

Reducing the settlements of soft foundation effectively is a critical problem of high-speed railway construction in China. The new CFG pile-slab structure composite foundation is a ground treatment technique which is applied on CFG pile foundation and pile-slab structure composite foundation. Based on the experience of constructing Beijing-Shanghai high-speed railway in China, the settlement-co...

Micro piles are small diameter pile (less than 300mm). generally used when there difficult ground conditions, such as natural or man-made obstructions, sensitive with adjacent structures, limited access/low headroom. drilled and grouted friction piles. Each includes steel elements that bonded into the bearing soil rock – usually cement grout. The stratum is logged during installation drilling t...

Helical piles are foundation systems used to support compression, tension, and lateral loads. However, this type of was around the world for more than 25 years. Its behavior, especially in Iraq, is still unknown scare. The present study carried out by analyses pile using finite element method. Modeling helical geometry has been proposed through computer program Plaxis 3D. Parametric were also p...