超大跨度深埋地下结构围岩压力计算研究

发布时间：2018-06-25 19:26

本文选题：深埋地下结构 + 超大跨度　；参考：《岩土力学》2015年S2期

【摘要】：围岩压力是地下结构设计与施工的重要依据。新建京张城际铁路八达岭车站拟定备选方案之一的单拱超大跨设计方案中,最大的跨度近45 m。对于类似超大跨度的深埋地下结构,传统的围岩压力理论与经验计算方法都存在着明显的局限性,已经不再适用。而结合现场勘查资料和室内外试验成果的数值模拟方法,尽管可以得到相对精确的围岩压力计算结果,但存在着计算过程复杂、计算效率低下的不足。因此,在计算分析了多种传统围岩压力计算方法与数值模拟方法获得的围岩压力所存在差异的基础上,对Q系统的围岩压力公式引入跨度项进行了修正,从而获得了能够快速估算超大跨度深埋地下结构围岩压力的估算方法。最后对不同跨度工程的围岩压力进行估算,并与监测值进行比较,对比结果良好。该方法不仅可以为工程设计人员及现场工作人员提供设计计算依据,还可为相关研究人员提供理论参考。
[Abstract]:Surrounding rock pressure is an important basis for underground structure design and construction. One of the options for the design of the Badaling Station of the newly built Beijing-Zhangcheng Intercity Railway is the single arch super-span design with the largest span of nearly 45m. For deep buried underground structures similar to super-large span, the traditional theory of surrounding rock pressure and the method of empirical calculation have obvious limitations and are no longer applicable. However, the numerical simulation method based on field survey data and indoor and outdoor test results can obtain relatively accurate results of surrounding rock pressure calculation, but the calculation process is complicated and the calculation efficiency is low. Therefore, on the basis of calculating and analyzing the differences between the traditional calculation methods and numerical simulation methods, the span term introduced into the formula of surrounding rock pressure in Q system is revised. Thus, a method to estimate the surrounding rock pressure of deep buried underground structures with large span is obtained. Finally, the surrounding rock pressure of different span engineering is estimated and compared with the monitoring value. This method can not only provide design calculation basis for engineering designers and field workers, but also provide theoretical reference for related researchers.
【作者单位】：北京交通大学土木建筑工程学院;
【基金】：中国铁路总公司科技发展计划重点项目(No.KCL10062530)
【分类号】：TU45;TU91

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