The Application of Compaction Sand Pile in the Yellow River-Crossing Project for South-to-North Water Diversion

摘要

In the construction of Yellow River-Crossing Project for the Middle Route of the South-to-North Water Transfer, the silt, silty sand and fine sand widely exist in the foundation, that it need to be processed in the region where the possibility of sand liquefaction because of the low bearing capacity. We had a detailed study and experiment for the sand compaction pile of the axis and the outside of the channel, and determined the compactness of pile body, pile length and the construction technology through the test. We also debugged the concrete construction parameters such as the amount of filling sand and stone, hoisting height and speed, extrusion times and so on. For these experiments, we attained the purpose of increasing the relative density, preventing sandy soil liquefaction, improving the shear strength of the foundation soil and the bearing capacity of the foundation, so as to reduce the foundation settlement.