地下管道断裂引起的土体侵蚀透明土模型试验分析  

Model Test Analysis of Soil Erosion Transparent Soil Caused by Underground Pipeline Fracture

作　　者：刘皓昀 段园煜 柏奥 方梅香[1] LIU Haoyun;DUAN Yuanyu;BAI Ao;FANG Meixiang(School of Urban Construction and Transportation,Hefei University,Hefei 230601,China)

机构地区：[1]合肥学院城市建设与交通学院,安徽合肥230601

出　　处：《兰州工业学院学报》2023年第4期38-42,共5页Journal of Lanzhou Institute of Technology

基　　金：安徽省高校自然科学研究重点项目(KJ2020A0664);安徽省教育厅省级质量工程项目(2020SJJXSFK2035)。

摘　　要：为研究地下管道断裂引起的土体侵蚀内部发展过程,利用透明土材料技术进行土体侵蚀模型试验。使用摄像设备记录透明土模型内部试验全过程,对试验过程的图像进行定量测量,分析塌陷坑尺寸随时间变化情况;利用差分法对试验图像进行对比,分析土体内部颗粒运动情况。试验结果表明:在无压管道内,因管道断裂而产生的土体塌陷,塌陷坑呈圆锥柱状,侵斜角为78°。塌陷深度在140 s之前塌陷较快,随后逐渐缓慢,直至因土体在管道断裂内堆积堵塞而停止,最终塌陷深度为62.1 mm。根据颗粒运动的程度不同,可将土体内部区域分为塌陷区、松动区和稳定区。In order to study the internal development process of soil erosion caused by underground pipeline fracture,soil erosion model test is carried out by using transparent soil material technology.The camera equipment is used to record the whole process of the internal test of the transparent soil model,the image of the test process is quantitatively measured,and the change of the size of the collapse pit with time is analyzed.The difference method is used to compare the test images and analyze the movement of particles inside the soil.The experimental results show that in the pressureless pipeline,the soil collapse caused by the fracture of the pipeline,the collapse pit is conical column,and the invasion angle is 78°.The collapse depth collapses quickly before 140 s,and then gradually slows down until it stops due to the accumulation of soil in the pipeline fracture,and the final collapse depth is 62.1 mm.According to the degree of particle movement,the internal area of the soil can be divided into subsidence area,loose area and stable area.

关 键 词：路面塌陷 透明土技术 土体侵蚀 颗粒运动 塌陷深度 

分 类 号：U416.1[交通运输工程—道路与铁道工程]