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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, according to the field engineering examples, the effect and mechanism of pre-reinforcement of shallow tunnel with mortar and bolt are discussed by means of model test.The results show that the application of such engineering measures can improve the force of shallow arch tunnel arch State; prevent the upper cover mountain from sliding to the end of the hole and reduce the collapse of the mountain body sinking.The article also pre-reinforcement of the relevant technical parameters, such as reinforcement width, anchor spacing and length of the analysis done, the results for design and construction Departmental reference.