多雨山区深路堑锚索框架梁防护设计分析

Analysis on Protection Design of Anchor Cable Frame Beam for Deep Cutting in Rainy Mountainous Area

摘要:

粤北某山区一级公路改扩建工程所在场所主要位于山地丘陵地貌上，路线局部分布有平原、台地地貌。工程难点位于原公路路线一处越岭展线，西侧为较为陡峭的岩质边坡，东侧为典型坡度较缓的岩土二元结构边坡，改扩建方案沿着东侧进行扩建，边坡防护方案采用预应力锚索+框架梁主动加固防护。通过结合该工程实例，采用简单实用的简化毕肖普法进行边坡稳定分析，得出设计方案满足路基边坡防护设计要求。

Abstract:

The site of the reconstruction and expansion project of a Class I highway in a mountainous area in northern Guangdong is mainly located on the mountainous and hilly landform. The route is partially distributed with plain and platform landform. The difficulty of the project is located at a crossing-ridge extension line of the original highway route. The west side is a steep rock slope, and the east side is a typical slope with gentle rock and soil binary structure. The reconstruction and expansion scheme is extended along the east side. The slope protection scheme is the initiative reinforcement and protection of prestressed anchor cable + frame beam. Combined with the engineering examples, the simple and practical simplified Bishop method is used to analyze the slope stability, and the design scheme meets the design requirements of subgrade slope protection.