软岩高边坡喷锚挡护的试验研究

结合南昆铁路软岩深路堑高边坡采用喷锚挡护的工程，开展了地质力学模型试验研究。结果表明：采用喷锚挡护时可明显减小开挖在坡体内形成的松动区范围；开挖坡面的变形具有“臌肚子”特征。还给出了喷层上土压力分布、锚杆受力规律等结果。在此基础上对原设计和施工提出了“保住中部，稳定坡脚”的修改原则。

Experimental Study on Shotcrete-bolt Support Applied to High Steep Slope of Weak Rockmass

The geomechanical model tests were carried out to study the stability of high steep slope of weak rockmass supported by shotcrete-bolt for the cutting engineering of Nankun railway. The test results show that the deformation of the cutted surface of the the slope has led to the characteristic shape of " a swelling abdomen ", and that the loose area formed in the slope is reduced distinctly with the help of shotcrete-bolt support. According to the test results the constructive amendments are submitted to the design.