关键词: 矩形抗滑桩;施工效率;成孔工艺;护壁结构;安全防护;滑坡治理;

Abstract: Laying anti-slide piles is an important engineering measure for landslide emergency treatment, and hole-forming efficiency is greatly related to the process of disaster relief.According to a landslide emergency treatment project in east of Chengdu plain, by means of field investigation, Pareto Diagram, factor analysis and engineering test, we first summarize the construction process of anti-slide pile, construction techniques status of hole-forming and wall-protection, then we analyze the main influencing factors of construction efficiency in anti-slide pile forming.The research shows that the pile hole excavation is the most critical factor affecting pile forming efficiency, which accounts for 76.67% of the total pile forming time.The key factors affecting the pile forming include the pile hole excavation technique, wall protection construction technology and safety guarantee measures.For the landslide treatment project, the excavation method of rotary excavation+manual edge cleaning has been successfully practiced.The combined wall protection structure of cast-in-situ reinforced concrete in sliding mass+sprayed concrete in sliding bed has also been applied to the project.As for the safety protection system structure, the project adopted landslide environmental safety control system and pile hole safety control technology.With these three key factors, the project achieved an average daily footage of more than 2.0 m and successfully completed 101 large cross-section, ultra-deep anti-slide piles within the required time.

Key words: rectangular anti-slide pile; construction efficiency; hole-forming technique; wall protection structure; safety protection; landslide treatment;