MEASURES FOR LOWERING PILES IN THE TRUONG SA ARCHIPELAGO BY ROTARY DRILLING TECHNOLOGY - BUILDING A DYNAMIC INTERACTION MODEL OF THE STEEL PIPE PILE LOWERING ROTARY DEVICE

Abstract

Stemming from the policy of planning and development for the Truong Sa archipelago (QDTS),
the actual situation of construction in the past years and the need for construction in the coming
period in the QDTS area. The construction solutions that use pile foundations in the QDTS area are
characterized by frequently subjected to large lateral loads and the effects of frequent repetitive
loads. In addition, the marine environment in the area is aggressive and corrosive to construction
materials. This feature makes it difficult to choose a concrete pile foundation solution (BTCT) to
ensure the long life of the building. To construct the pile foundation fabricated in situ in the QDTS
area, it is necessary to apply the anti-wall pipe technology with the length of the pile and the support
pipe down to the coral rock layer below. The requirement for the construction of pile foundation in
the QDTS area is to have a rock-breaking drill or a rotary drilling device to lower the support pipe to
the hard coral rock layer.