地下排水管道状态评价理论研究

发布时间：2018-06-02 01:47

本文选题：排水管道 + 管道恶化　；参考：《中国地质大学（北京）》2014年硕士论文

【摘要】：城市地下排水管道主要用于输送生活污水并及时排除雨水，，在城市居民生活以及基础设施建设中都起到了至关重要的作用。但目前我国地下排水管道的运营管理系统并不完善，以至于由于排水系统故障引发的路面塌陷、污水管道外溢、城市内涝等灾害频频发生。为了有效预防此类灾害，需要建立集监测、评估、维护与修复于一体的地下排水管道评价系统。但目前我国对于地下排水管道缺陷的检测评价方法比较单一，评价理论较为缺乏。我国2012年出台城镇排水管道检测与评估技术规程也只列出了仅反映管道的表面状态而无法估算管道的实际强度的图像评价技术，因而其指导价值大打折扣。本研究首先分析了国内地下排水管道及其评价理论的发展现状，并对地下排水管道运行状况进行了调研分析，在此基础上对在役排水管道定义了管道恶化的概念并对影响管道恶化的因素进行了归类分析，然后把管道恶化分为了结构恶化和水力恶化两大类。针对管道结构状态的恶化过程，本文先以Marston垂直土压力理论为基础阐述了管道在常规荷载作用下的受力状态以及管土间的相互作用。当管道周围土体承受的荷载过大或者因施工造成管道周围土体流失时，都会引起管道的沉降变形，因此通过探讨管道沉降标准，分析适用于模拟管道沉降作用的弹性地基梁模型，针对刚性管道和柔性管道提出了不同的沉降计算方法。此外由于因管道接口损坏导致管道失效的比例较高，本文分别针对管道的刚性接口和柔性接口在土体运动中力学性能的改变进行了分析。最后考虑到管道周围存在长期的土体流失现象，本文对排水管道的悬空状态也进行了一定程度的探讨。对于管道的水力恶化状态，一般情况下其评估模型包括物理模型和统计模型两种，但一方面由于本研究过程中未能获取足够的分析数据，一方面受限于本专业的研究范围，本文对地下排水管道的水力恶化状况只进行了统计分析，提出并分析比较了齐次泊松过程模型、过程更新模型、非齐次泊松过程模型以及渐进多元回归等统计模型。
[Abstract]:Urban underground drainage pipes are mainly used to transport domestic sewage and remove Rain Water in time, which plays an important role in urban residents' life and infrastructure construction. However, the operation and management system of underground drainage pipeline in our country is not perfect at present, so many disasters such as pavement collapse, sewage pipeline overflow and urban waterlogging occur frequently due to the failure of drainage system. In order to prevent this kind of disaster effectively, it is necessary to establish an evaluation system of underground drainage pipeline which integrates monitoring, evaluation, maintenance and repair. However, at present, the inspection and evaluation method of underground drainage pipeline defects in our country is relatively single, and the evaluation theory is relatively lacking. In 2012, the technical regulations of urban drainage pipeline inspection and evaluation in China only listed the image evaluation technology which only reflected the surface state of the pipeline but could not estimate the actual strength of the pipeline, so its guiding value was greatly reduced. This paper first analyzes the development status of domestic underground drainage pipeline and its evaluation theory, and investigates and analyzes the operation of underground drainage pipeline. On this basis, the concept of pipeline deterioration is defined and the factors affecting pipeline deterioration are classified and analyzed. Then the pipeline deterioration is divided into two categories: structural deterioration and hydraulic deterioration. In view of the deterioration process of pipeline structure, based on Marston vertical earth pressure theory, the stress state of pipeline under normal load and the interaction between pipe and soil are expounded in this paper. When the load on the soil around the pipeline is too large or the soil loss around the pipe is caused by the construction, it will cause the settlement deformation of the pipeline, so the settlement standard of the pipeline is discussed. The elastic foundation beam model which is suitable for simulating pipeline settlement is analyzed. Different settlement calculation methods are proposed for rigid pipeline and flexible pipeline. In addition, due to the high proportion of pipeline failure caused by pipeline interface damage, the changes of the mechanical properties of the rigid and flexible joints in the soil are analyzed in this paper. Finally, considering the long-term soil loss around the pipeline, the suspended state of the drainage pipeline is also discussed to a certain extent. For the hydraulic deterioration of pipeline, generally, its evaluation model includes physical model and statistical model, but on the one hand, due to the failure to obtain enough analytical data in the course of this study, on the other hand, it is limited by the scope of the professional research. In this paper, the hydraulic deterioration of underground drainage pipeline is only analyzed, and the statistical models such as homogeneous Poisson process model, process renewal model, non-homogeneous Poisson process model and progressive multivariate regression model are put forward and compared.
【学位授予单位】：中国地质大学（北京）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU992

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