博尔博松大桥工程滑坡成因分析及治理研究

Analysis of the Causes for Landslip Induced by Construction of Boerbosong Bridge and Research on Its Treatment

研究目的:随着我国西部大开发战略的实施,广大的中西部山区铁路建设步伐进一步加快,工程修建引发的滑坡也不断增加。滑坡属不良地质,对工程影响极大。因对滑坡认识不足而在工程建成后出现问题造成重大损失的事件屡有发生,正确认识滑坡,对其稳定性做出正确评价是非常重要的。总结博尔博松工程滑坡经验教训,分析滑坡形成机理,产生原因,提出处理措施,对保障铁路建设,安全运营具有重要意义。研究结论:山区铁路选线必须贯彻"预防为主"的原则。顺层斜坡地段不宜"大填、大挖",破坏山体的稳定性;在顺层斜坡地段修建工程时,临时支护措施要加强,长大顺层斜坡地段线路应以绕避为主。

Research purposes： With the implement of strategy of developing the west, the railway construction in western mountain area is speeded up. The landslide induced by construction increases. Landslide belongs to unfavorable geology disaster with huge impact on the construction. Due to the insufficient understanding of the landslide, there are many badly damaged accidents occurring after the completion of construction. Thus a correct understanding of landslide is very important to making a correct evaluation of the stability of landslip. Summarizing the experience, analyzing the forming mechanism and causes for the landslip induced by construction of Boerbosong Bridge and offering the treatment measures are very significant to design and construction of the railway and ensuring the traffic safety. Research conclusions： The principle of ＂Prevention First＂ should be followed to route selection in mountain area. It is unavailable for ＂Big Cut and Big Filling＂ in bedding slope area, because the ＂Big Cut and Big Filling＂ will destroy the stability of the mountain. The temporary support should be strengthened when constructing in bedding slope area. The route should avoid or bypass the bedding slope area.