排水管道检测技术浅析

排水管道的使用寿命与日常维护和检测息息相关,随着科技的发展,其检测手段和技术也在不断提高。为提高城市排水管道质量评估的准确性,保障后期保养修复的适用性,直观反映管道运行状态及存在问题,引入排水管道检测技术无疑非常重要。基于此,本文着重介绍了排水管道检测技术的发展与应用。     

CCTV技术在排水管道检测中的应用与探讨

CCTV技术,在排水管道功能完备性及结构安全性检测中的应用,极大地丰富了排水管道检测技术。本文从CCTV技术在排水管道检测中的工作流程、实施问题、设备局限性等方面,阐述CCTV技术在排水管道检测中的应用现状探讨及发展展望。     

排水管道内窥检测项目技术施工方案研究

简单介绍了排水管道内窥检测项目技术施工方案研究的意义,对排水管道内窥检测项目技术施工方案研究内容进行了深入的探讨和分析,并说明了整个排水管道检测维护工作的要点,以保证排水管道的质量。     

CCTV技术在排水管道状态检测中的应用

介绍了CCTV管道内窥技术的工作原理、程序,详细阐述了影像判读及管道状态评估的计算方法和步骤,并以某排水管道CCTV检测工程为例介绍了该技术在排水管道状态检测中的应用情况和效果。     

上海排水管道养护检查技术和养护监管机制

城市排水管道是城镇排水安全的重要组成部分。排水管道设施的完好、畅通,关键在于日常维护与管理。着重介绍了电视和声纳检测在排水管道养护检查中的运用。叙述了在排水管道养护监管方面的探索与实践。最后总结了排水管道监管的成效。     

排水管道电视检测综合单价及起步价的确定

排水管道电视检测技术在上海市排水管道检测工程中日益推广应用。经过资料收集和实测,分析了人工、材料、机械消耗,计算了定额消耗量,编制了排水管道电视检测项目定额,核定了综合单价,推动了先进检测技术在养护管理中的应用,同时统一了计价、规范了市场。最后提出了排水管道检测工程起步价的概念,针对管道养护工程特定情况,控制检测单位利润。     

排水管道的内窥检测技术

阐述了排水管网的非开挖修复技术及排水管道内窥检测技术。管道内窥检测可分为排水管道功能性检测和排水管道结构性检测。通过排水管网内窥检测技术可以很好地解决城市道路的隐患,为科学管理排水管网提供了先进的技术支持。     

CCTV管道内窥检测技术在城市排水管道中的应用

文中分析了CCTV管道内窥检测技术,在此基础上探究了CCTV检测技术工作技术规程,提出CCTV管道内窥检测技术在应用中要明确操作流程,并能在管道清疏、排水管道内窥检测及竣工验收中进行合理应用。     

排水管道泄漏检测技术及发展趋势分析

排水管道泄漏会对地下土壤造成污染,还可能引发冲刷空洞、塌陷等严重事故,应及时检出。通过文献调研排水管道泄漏检测技术的发展趋势,分析了CCTV、QV、土壤特征因子分析、探地雷达、航空热成像、高密度电阻率法、浅层瞬变电磁法等主流和潜在检测技术的特点、优劣势及现阶段研究方向。分析发现：国内CCTV检测技术多个技术细分方向都还有待发展;现有单一检测技术无法应对所有类型的检测任务,要获得准确、完整的地下管道状态信息,应综合应用多种技术;浅层瞬变电磁法是较有潜力的排水管道泄漏检测技术。     

城市排水管道检测技术的应用及发展

排水管道是城市地下网管中最重要的基础设施之一,排水管道的功能和结构将直接影响到城市排水管道的安全运行。由于前期城市化发展未充分结合实际情况,导致我国城市排水体系不完善、管道检测养护手段落后、管道服务周期长等各种问题,且管道检测养护手段不够完善,无法对排水管道的缺陷进行全面的检测,导致在后期使用中排水管道事故频繁发生。该文主要研究城市排水管道检测技术,并分析城市排水管道检测技术的发展趋势。     

塑料排水检查井在住宅小区的应用前景

分析了传统排水检查井的缺点,介绍了塑料排水检查井的构造和特点(具有水力条件好、施工安装简便、占地面积小、节能、成本低等),探讨了其应用前景,并对塑料排水检查井在中国的推广提出了相关建议.     

排水管道检测技术的发展现状

对地下管道进行经常性的检测是避免其发生事故的有效措施,为此详细介绍了管道检测技术的现状、发展趋势及相关技术在国内的应用情况,并对我国排水管道检测的管理提出了改进建议.     

Towards autonomous sewer robots: the MAKRO project

We expose current research and development in information technology that deals with building and controlling autonomous service robots for performing inspection tasks in sewerage systems that are inaccessible for humans. The problem is explained, the physical and legal boundary conditions for operating sewer robots are described, the state of current sewer inspection technology is sketched, and the need for using advanced technology in this area motivated. Respective work that we have been doing for the last four years, and that is currently being pursued in the MAKRO project, is presented. The main technological and control problems are described, and how Artificial Intelligence research and technology may be employed to solve the latter.     

岩土工程锚杆检测技术发展现状

在岩土工程中,锚杆支护技术应用较广。因此,对于锚杆施工质量检测要求较高。本文综述了目前国内外锚杆施工质量检测技术,为进一步研究更为先进的锚杆无损检测技术打下一定基础。     

Evaluation of uncertainties in sewer condition assessment

Closed Circuit Television Inspection is used since decades as industry standard for sewer system inspection and structural performance evaluation. In current practice, inspection data are helpful to support asset management decisions. However, the quality and uncertainty of sewer condition assessment is rarely questioned. This article presents a methodology to determine the probability to underestimate, overestimate or accurately estimate the real condition of a pipe using visual inspection. The approach is based on the analysis of double inspections of the same sewer pipes and has been tested using the extensive data-set of the city of Braunschweig in Germany. Results indicate that the probability to inspect correctly a pipe in poor condition is close to 80%. The probability to overestimate the condition of a pipe in bad condition (false negative) is 20% whereas the probability to underestimate the condition of a pipe in good condition (false positive) is 15%. Finally, sewer condition evaluation can be used to assess the general condition of the network with an excellent accuracy probably because the respective effects of false positive and false negative are buffered.     

基于VR 技术油库安全隐患排查及演练系统设计

针对油气储存等危险化学品行业隐患排查及应急处置训练难题,提出了基于 VR 技术的油库隐患排查及应急演练培训系统。该系统利用 VR 开发引擎,运用 3D Max、Unity 3D、Visual Studio 等开发工具完成对油库环境及其作业场景的三维建模与可视化,并利用高保真可编程渲染管线技术达到高度逼真的画面效果,实现了具有真实感的油库三维环境漫游、知识学习、隐患排查训练以及典型火灾事故应急处置演练等各个应用场景的动态仿真。应用结果表明,该系统可有效提高油库隐患排查及应急演练培训水平。     

3S技术在土地利用动态监测中的应用

3S技术的结合是当前空间信息技术发展的重要方向,本文介绍了以G IS为核心的3S技术在土地利用动态监测中的应用,以期检验土地利用总体规划成果,提高土地利用率和土地生产力,实现土地利用可待续发展,说明3S技术在土地管理中具有广阔的前景。     

Visual sewer inspection: detail of coding system versus data quality?

In order to provide information about the decisions on proactive and reactive maintenance, sewers are visually inspected. Previous research showed that the quality of visual inspection data is questionable. A coding system prescribes which and how defects should be recorded. This article studies the influence of the coding system on quality of inspection data. A database with the examinations of the Dutch sewer inspector course is studied. Through time, 10 photos of the inside of a sewer were evaluated according to two different coding systems: the concise NEN3399:1992 and the more detailed and extensive NEN3399:2004.This article compares both coding systems by evaluating candidate responses to photos showing sewers with clearly visible defects. Results show that added detail in the coding system of 2004 leads to more mistakes. Therefore, it can be concluded that the increase in detail does not lead to more information.     

Influence of available data on sewer inspection program efficiency

One key aspect of sewer inspection programs is the prediction of sewer condition. Despite the development of deterioration models, the influence of available data on models' predictive power has not been studied in depth. In this article, numerical experiments on a semi-virtual asset stock have been conducted to answer two main questions: how to establish a list of the most informative factors and whether it is better to have data imprecision instead of data incompleteness in a utility database. Two approaches for establishing a list of the most informative factors are compared. The results show a statistical analysis (a priori analysis) can predict the impact of available data on inspection program efficiency (a posteriori analysis). This can be used to plan data acquisition programs. Finally, we show that using the notion of “district” (data imprecision) can provide efficient results when the most informative factor “age” is not available (data incompleteness).