摘要
本文针对现场工程实例,采用模型试验的手段,探讨了用砂浆锚杆对浅埋隧道地表进行预加固的效果与机理.结果表明,应用这种工程措施,可改善浅埋隧道拱部的受力状态;防止上方覆盖山体向洞口端滑动以及减轻山体的坍塌下沉.文中还对预加固时的有关技术参数,如加固宽度、锚杆间距及长度做了分析研究,其结果可供设计和施工部门参考.
In this paper, with regard to the practical problem in engineering,we study the pre-reinforcing effect and mechanism of applying mortar -bolts in the top part of shallow tunnel by means of model test.The test result shows that by using this technique pressure state on the arch part of tunnel can be improved, slide of soil body above tunnel towards the entrance end prevented, and collapse and settlement of the soil body decreased.Moreover, some technical parameters of executing pre-reinforcing method, e.g.reinforced width, span and length of bolt, are also analyzed and studied.The result is of some reference value to the design and construction departments.
出处
《长沙铁道学院学报》
CSCD
1992年第2期28-37,共10页
Journal of Changsha Railway University
关键词
浅埋隧道
砂浆锚杆
预加固
隧道
shallow tunnel, mortar-bolt, pre-reinforcing, model test
