Research on Construction Technology of Combined Omni-directional High-pressure Jet Pile

Abstract

With the vertical and horizontal expansion of urban underground space, there is an urgent need for the construction technology of underground building structures, and the application of underground diaphragm walls as basement support design is becoming more and more common. The application theory of the high-pressure rotary jetting pile as a water stop for the ground connection wall joint has great application potential in practical engineering. This paper analyzes the process principle, characteristics, process, operation points and economic and social benefits of the combined all-round high-pressure jetting pile construction technology, and demonstrates the advantages of this method in specific applications from multiple perspectives. The method adopts a three-axis mixing pile driver and a conventional omnidirectional high-pressure rotary jet pile equipment to form a new type of construction machine. It is a kind of micro-perturbation grouting construction technology, which can quickly penetrate the complex underground geology and avoid the impact of hole collapse on drilling. Strong controllability, can effectively protect the safety of surrounding buildings and municipal facilities.