浅埋PVC管道穿越挖填方场地时受力状态研究
发布时间：2018-09-18 08:02
【摘要】：以延安新区黄土沟壑高填方工程中的PVC输水管道为原型,通过1:2物理模型试验,预设沉降底板模拟高填方的工后沉降过程,对比不同接口布设位置的管道在穿越填挖结合场地时的受力变形过程,采集管道变形、应变和管土接触压力等数据,对比不同接口位置对管道的影响。研究表明:浅埋PVC管道受负土拱效应影响明显,深层沉降量超过6 mm后填方场地中管道底部与土体出现脱空,管道竖向变形明显。对比2根管道的内力曲线发现,填挖结合部位中管道的内力受支座转角与竖向位移控制,管道接口的不良影响在这一阶段开始显现,建议在填挖结合区和工后沉降量大的填方场地采用柔性接口设计。
[Abstract]:Taking the PVC water conveyance pipeline in the loess gully high fill project in Yan'an New area as the prototype, the postconstruction settlement process of the high fill is simulated by the preset settlement bottom plate through the 1:2 physical model test. The stress and deformation process of pipeline with different interface location is compared, and the data of pipeline deformation, strain and tube-soil contact pressure are collected, and the influence of different interface location on pipeline is compared. The results show that the shallow PVC pipeline is obviously affected by the negative soil arch effect, the deep settlement is more than 6 mm and the pipe bottom and soil in the filling site appear to be empty, and the vertical deformation of the pipeline is obvious. Comparing with the internal force curves of two pipes, it is found that the internal force of the pipeline in the filling and digging joint position is controlled by the angle of the pedestal and the vertical displacement, and the bad influence of the pipe interface begins to appear at this stage. It is suggested that flexible interface design should be adopted in the filling and excavation area and in the filling site with large settlement after construction.
【作者单位】： 长安大学地质工程与测绘学院;陕西科技控股集团有限责任公司;
【基金】：陕西省重点科技创新团队计划项目(2016KCT-13) 陕西省重点产业创新链“社会发展领域”资助项目(2015KTZDSF03-02) 陕西省社会发展科技攻关项目(2016SF-455)
【分类号】：TU991.05
[Abstract]:Taking the PVC water conveyance pipeline in the loess gully high fill project in Yan'an New area as the prototype, the postconstruction settlement process of the high fill is simulated by the preset settlement bottom plate through the 1:2 physical model test. The stress and deformation process of pipeline with different interface location is compared, and the data of pipeline deformation, strain and tube-soil contact pressure are collected, and the influence of different interface location on pipeline is compared. The results show that the shallow PVC pipeline is obviously affected by the negative soil arch effect, the deep settlement is more than 6 mm and the pipe bottom and soil in the filling site appear to be empty, and the vertical deformation of the pipeline is obvious. Comparing with the internal force curves of two pipes, it is found that the internal force of the pipeline in the filling and digging joint position is controlled by the angle of the pedestal and the vertical displacement, and the bad influence of the pipe interface begins to appear at this stage. It is suggested that flexible interface design should be adopted in the filling and excavation area and in the filling site with large settlement after construction.
【作者单位】： 长安大学地质工程与测绘学院;陕西科技控股集团有限责任公司;
【基金】：陕西省重点科技创新团队计划项目(2016KCT-13) 陕西省重点产业创新链“社会发展领域”资助项目(2015KTZDSF03-02) 陕西省社会发展科技攻关项目(2016SF-455)
【分类号】：TU991.05
【相似文献】
相关期刊论文 前10条
1 王世才;上埋式高填方矩形混合涵洞的构造和计算探讨[J];四川建筑科学研究;1993年04期
2 ;建设科技信息[J];施工技术;1993年01期
3 王会成;;六盘水机场高填方施工重点难点及应对策略浅析[J];西部探矿工程;2014年09期
4 饶富才;曾运财;何俊朋;;关于贵州仁怀机场倾斜基底高填方滑坡防范与治理的探讨[J];城市建筑;2013年20期
5 刘财华;阎宇峰;;机场高填方地基变形及稳定性分析[J];公路交通科技(应用技术版);2014年06期
6 魏，
本文编号：2247280
本文链接：https://www.wllwen.com/jianzhugongchenglunwen/2247280.html
