No abstract

No abstract

At coastal beach soft soil area, reclamation projects may have great effect on the deformation of the existing underground pipeline. In this paper, the engineering specification method and the finite element method are used respectively for the pipe deformation calculation of the application of platform on piles to handle such underground pipeline deformation control. The results show that the application of platform on piles can effectively diminish the settlement deformation of the existing underground pipe. Co mparing the two calculation results and the monitoring results, the finite element calculation results are more in line with the actual. By appropriately increasing the width of the platform and the pile spacing, the initial design program can achieve a more optimal solution.

No abstract

A newly developed wall function for the velocity-profile of steady turbulent flow in various hydraulic regimes near rough walls was created. The wall function was then applied into two approaches to obtain the total flow energy loss (mechanical energy loss) of turbulent pipe flow. The energy loss values calculated through the above two approaches both predicted the experimental results well. The energy loss coefficient calculated through the second approach gave a more precise definition of the total flow characteristics than the Manning roughness coefficient as it was proved to be a function of the field statistics. It was furtherly found that this energy loss can be decomposed into the energy loss due to dissipation caused by molecular viscosity and the dissipation of turbulent kinetic energy, and that its density distribution falls mainly into the near-wall region.