水利水电技术（中英文）

分析了造成隧道底鼓的多种影响因素，包括地下水压力、膨胀围岩的膨胀力以及高地应力下基底薄层围岩失稳引起的隆起力。针对高地应力下水平岩层的仰拱隆起机理，提出了一种新的底鼓分析理论方法。利用欧拉压杆原理对层状围岩进行了稳定性分析，提出了计算基底岩层隆起深度、上拱荷载的方法，并确定了仰拱的合理矢跨比及结构安全系数。最后，基于上述分析结果，提出了针对性的隧底隆起控制技术措施。

Various factors causing tunnel base bulging were analyzed， including groundwater pressure， the expanding force of swelling surrounding rocks， and the rising force caused by the instability of thin layered foundation rocks under high geostress. In response to the mechanism of arch uplift under high geostress for horizontal rock layers， a new theoretical approach for base bulge analysis is proposed. Using the Eulerian compression rod principle， stability analysis of layered surrounding rocks has been conducted， and methods for calculating the depth of base rock layer uplift and the overlying load have been developed. Additionally， the rational span-to-depth ratio and structural safety coefficient for the arch have been determined. Finally， based on the above analysis results， targeted technical measures for controlling tunnel base bulging have been proposed.