极限承载状态排土场柔性地基泄水涵洞稳定性研究  

Study on Stability of Discharge Culvert on Flexible Foundation of Dump under Ultimate Bearing State

作　　者：姜立春[1,3] 蔡文倩 赖希文 张要强 杨超 JIANG Lichun;CAI Wenqian;LAI Xiwen;ZHANG Yaoqiang;YANG Chao(College of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,China;Guangdong Provincial Science and Technology Collaborative Innovation Center for Work Sa f ety,Guangzhou,510640,China;Institute of Safety Science and Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学土木与交通学院,广州510640 [2]广东省安全生产科技协同创新中心,广州510640 [3]华南理工大学华南理工大学安全科学与工程研究所,广州510640

出　　处：《太原理工大学学报》2020年第6期926-932,共7页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(51974135);国家重点研发计划项目(2016YFC0600802)。

摘　　要：为研究过载排土场下泄水涵洞的稳定性,以某矿山排土场柔性地基的泄水涵洞为例,考虑竖向和侧向载荷极限状态组合效应,构建箱涵力学计算模型,计算顶板及侧壁的轴向力和剪应力,研判其稳定性,并与数值模拟和现场勘察结果进行对比分析。结果表明:箱涵左右侧壁所受轴向力最大,箱涵倒角部位承受剪应力和轴向力最大,均处于极限允许范围内,数值模拟结果与计算结果相符,涵洞整体稳定性良好,现场调查结果验证了力学计算结果的合理性。在实际排土作业过程中,矿山应严禁超限堆土。该研究为排土场下泄水涵洞的稳定性分析提供了重要的理论指导。In order to study the stability of drainage culvert under overload dump,by taking a drainage culvert on flexible foundation of a mine dump as an example and considering the combined effect of vertical and lateral load limit states,a mechanical calculation model of box culvert was established,the axial force and shear stress of roof and side wall were calculated,its stability was evaluated,and the results were compared with numerical simulation and field investigation.The results show that the axial force on the left and right sides of the box culvert is the largest,and the shear stress and axial force on the chamfer of the box culvert are the largest.The numerical simulation results are in agreement with the calculation results.The overall stability of the culvert is good.The field investigation results verify the rationality of the mechanical calculation results.In the process of actual dump operation,it is strictly forbidden to pile up excessive soil in mines.This study provides important theoretical guidance for stability analysis of discharge culvert under dump.

关 键 词：涵洞 极限承载状态组合效应 稳定性 排土场 柔性地基 

分 类 号：U449[建筑科学—桥梁与隧道工程]