浆囊袋压力型土钉新技术及工作机理研究

New slurry pressure type soil-nailing technology and its working mechanism

为解决软土地基中土钉抗拔力小、施工质量难以控制的问题,开发了浆囊袋压力型土钉新技术,介绍了其工艺原理和施工技术,提出了相应的承载力计算方法。最后采用三维有限元分析方法研究了浆囊袋压力型土钉的荷载传递规律,分析了注浆体直径、长度以及地基土质条件的影响。

In soft soil foundation, the strength of soft soils is low and the quality of the construction of the conventional soil-nailing is hard to be controlled. To solve these problems, new slurry pressure type soil nailing technology is developed, and the soil-nailing ultimate resistance is calculated by carrying out the field pullout tests. In addition, the finite element software is adopted to establish the three finite element analysis model for slurry pocket pressure type soil nailing. The transfer law of load is studied, and the effects of the soil conditions and the dimensions of the grouting are analyzed.