关键词: 旋喷锚杆, 软弱土层, 跟管钻进, 高压旋喷工艺, 成孔质量

Abstract: Ground anchor, as one of the most important uplift resistance method, has always been the focus of the engineering project research due to its adaptability for a wide range of soils and simple construction installations. However, when adverse geological conditions such as high fill, high water level, soft plastic clay layer etc. are encountered, it is easy to induce adverse effects in the installation of the uplift resistance anchors. Through field in-situ tests, work efficiency analysis, economic analysis and feasibility analysis, compared with the traditional cased drilling method, the high-pressure jet grout method in advance can improve the borehole quality, enhance the bonding strength between rock and soil mass and anchor mass, and enhance the properties of soil layer, which can effectively resolve the problems induced from unfavorable geological conditions to anchor installation. Under the construction of the real-time management and information method, this method can be better applied to the construction of uplift resistance ground anchor in the soft soils.

Key words: Jet Grouted Soil Anchors, Soft Soil Layers, Cased Drilling, High Pressure Jet Grout Process, Borehole Quality