基于普氏理论的圆形隧道竖向土压力计算方法  

An approach to calculating the vertical earth pressure on a circular tunnel based on Protodyakonov’s Theory

作　　者：邱岳峰 Qiu Yuefeng(Power China Zhongnan Engineering Corporation Limited,Changsha Hunan 410014,China)

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《山西建筑》2023年第24期137-140,共4页Shanxi Architecture

摘　　要：基于经典普氏压力拱理论,对隧道竖向土压力进行了分析论证,在此基础上,结合圆形隧道开挖后土体滑裂面的实际情况,对经典普氏压力拱理论进行了合理的改进,推导了圆形隧道平衡拱半跨度B和平衡拱高度h的解析表达式,由此建立了圆形隧道竖向土压力计算公式。通过一个具体的算例,对比分析了圆形隧道条件下直接采用经典普氏压力拱理论以及采用文中改进方法所得隧道竖向土压力之间的差异,初步验证了文中所提出改进方法的合理性。Based on the classical Protodyakonov’s Equilibrium Arch Theory,the vertical earth pressure on a tunnel is analyzed.Then,the theory is reasonably improved by combining the actual sliding surface in soil after the excavation of a circular tunnel.The analytical solution specific to the span and the height of the equilibrium arch under the circumstance of a circular tunnel is then carried out.Therefore,the formula of the vertical earth pressure on a circular tunnel is established.The difference between the classical Protodyakonov’s Equilibrium Arch Theory and the method put forward in the paper is further analyzed through the result of the vertical earth pressure obtained from an example.Which preliminarily indicates the reasonability of the method proposed in the paper.

关 键 词：普氏压力拱理论 竖向土压力 圆形隧道 

分 类 号：TU432[建筑科学—岩土工程]