Abstract:For the first time in bridge engineering, the full section deep foundation reinforcement is used as the supporting layer and water barrier layer of the foundation of anchorage ground connecting wall. In order to ensure that the quality of the deep foundation reinforcement with ultra-high pressure rotary jet grouting piles meets the requirements of the design drawings, and relying on the on-site process test research of anchor construction, 3~4 kinds of advanced ultra-high pressure rotary jet grouting processes are selected, Through the experimental comparison, the optimal process and parameters for the full section reinforcement of bridge foundations suitable for deep soft soil cover layer and high confined water geological characteristics are selected. The optimal process and corresponding optimized construction parameters determined by the experiments are used to guide the subsequent large-scale construction and ensure the overall reinforcement quality.
