Selection of Water Transmission Method and Analysis of Pipe Network Zoning in Municipal Water Supply and Drainage Design

With the acceleration of urbanization,the demand for water supply and drainage pipe networks has increased significantly.In the planning of urban construction,it is necessary to optimize the design of the water supply and drainage system pipe network to effectively save energy while providing residents with more accessible water resources.Therefore,the municipal water supply and drainage system and the water transmission methods should be designed according to the geographical conditions of the city.In this paper,we mainly analyze the design of municipal water supply and drainage systems and the selection of water transmission methods.Besides,the optimization of the water supply and drainage network zoning process and pipe network maintenance is also discussed,so as to provide a reference for municipal water supply and drainage work.

Analysis of Municipal Water Supply and Drainage Pipe Design Technology

The quality and safety of residents’water rely heavily on the design of municipal water supply and drainage pipes.Therefore,this paper aims to enhance the optimization of municipal water supply and drainage pipe design by focusing on design requirements,principles,and key elements.Drawing from relevant design optimization experiences,technology advancements,and optimization measures,the research will analyze and consolidate the essential aspects of municipal water supply and drainage pipe design.The goal is to fundamentally elevate the quality standards of these designs,ensuring they meet the criteria for engineering project excellence.Through this comprehensive approach,we aim to contribute to the improvement and sustainability of water supply and drainage systems,safeguarding the well-being of residents.

Reflections on the Construction of Water Supply and Drainage in Integrated Pipe Corridor of Sponge City

With the continuous development of economy and society and the continuous improvement of peoples’living environment requirements,the concept of sponge city construction has been recognized and understood by more and more people.The country has also recognized the significance of planning and construction of sponge cities.In the process of planning and constructing a sponge city,it is necessary to combine the reality of urban development with the construction of urban water supply and drainage systems and underground pipe corridors to promote the process of urban modernization.Based on this,this paper analyzes the water supply and drainage construction of the integrated pipe corridor in the sponge city.

Analysis of HDPE Pipe Construction Process in Municipal Water Supply and Drainage Construction

The construction of water supply and drainage pipelines is a very important part of municipal construction.The construction of HDPE pipe has been widely used in the construction field of water supply and drainage pipelines due to its many advantages.Therefore,the construction process of HDPE pipe has also been studied more and more in the construction of municipal water supply and drainage,which is of great significance for the application of HDPE in municipal water supply and drainage construction.This paper analyzes the HDPE pipe construction process of municipal water supply and drainage construction workers,and hopes to help the good application of HDPE pipe and the improvement of municipal water supply and drainage construction quality.

Impact of the Condition of Drinking Water Supply Networks on the Quality of Water Intended for Consumption: The Case of the Network in the Commune of Daloa (Central West of Côte d’Ivoire)

The potability of drinking water depends not only on the source and the treatment system, but also on the quality of the waterworks. In fact, the quality of drinking water is considerably degraded by the dilapidated state and lack of maintenance of drinking water networks. In Côte d’Ivoire, the majority of drinking water networks in the various towns are ageing. In Daloa, despite the efforts made by the company in charge of water treatment and distribution to make the water drinkable, the water at consumers’ taps is often colored, has an unpleasant aftertaste and settles after collection. As a result, people are concerned about the potability of tap water, and some are turning to alternative sources of drinking water of unknown quality. In order to determine the factors responsible for the deterioration in water color and taste, as well as the sectors of the network most affected, a diagnosis of the network’s equipment was carried out. Water samples taken from the network were analyzed for color and turbidity. The diagnosis revealed that most of the equipment (suction pads, valves, drains and fire hydrants) is outdated and irregularly maintained. Analyses show that the water is more colored in cast-iron and PVC pipes than in asbestos cement pipes. Coloration values in the network range from 0 to 27 UVC for asbestos cement pipes, from 15 to 56 UCV for ductile iron pipes, and from 11 to 102 UCV for PVC pipes. On the over hand, turbidity values vary from 8.02 to 3.32 NTU for ductile cast iron pipes, 8.51 to 16.98 NTU for asbestos cement pipes and 0.9 to 6.98 NTU for PVC pipes. Old cast-iron pipes release ferric ions on contact with water, degrading their color. Old cast-iron pipes release ferric ions into the water, degrading its color. The high color values observed in the vicinity of drains are thought to be due to irregular maintenance of the network. In fact, after network maintenance, a reduction rate ranging from 2% to 73% is observed for turbidity, while for color, the rate varies from 5% to 72%. In short, the network’s obsolescence and irregular maintenance contribute significantly to the deterioration of water quality.

Effectiveness of urban distributed runoff model for discharge and water depth calculation in urban drainage pipe networks

Effective urban land-use re-planning and the strategic arrangement of drainage pipe networks can significantly enhance urban flood defense capacity.Aimed at reducing the potential risks of urban flooding,this paper presents a straightforward and efficient approach to an urban distributed runoff model(UDRM).The model is developed to quantify the discharge and water depth within urban drainage pipe networks under varying rainfall intensities and land-use scenarios.The Nash efficiency coefficient of UDRM exceeds 0.9,which indicates its high computational efficiency and potential benefit in predicting urban flooding.The prediction of drainage conditions under both current and re-planned land-use types is achieved by adopting different flood recurrence intervals.The findings reveal that the re-planned land-use strategies could effectively diminish flood risk upstream of the drainage pipe network across 20-year and 50-year flood recurrence intervals.However,in the case of extreme rainfall events(a 100-year flood recurrence),the re-planned land-use approach fell short of fulfilling the requirements necessary for flood disaster mitigation.In these instances,the adoption of larger-diameter drainage pipes becomes an essential requisite to satisfy drainage needs.Accordingly,the proposed UDRM effectively combines land-use information with pipeline data to give practical suggestions for pipeline modification and land-use optimization to combat urban floods.Therefore,this methodology warrants further promotion in the field of urban re-planning.

天山胜利隧道内置高位水池的消防供水系统设计研究

为解决10 km甚至20 km以上的高寒高海拔超长公路隧道消防供水系统设计中洞外设置供水系统被冻结、洞内管网严重超压等难题,通过对乌尉高速天山胜利隧道消防设计的难点,以及常规的隧道外常高压供水系统及稳高压供水系统在该隧道中难以实施等问题展开深入研究,提出天山胜利隧道内设置高位消防水池及将隧道内消防管网进行分区供水的设计方案并详细论述。对于10 km甚至20 km以上的高寒高海拔超长公路隧道消防供水系统的设计:1)隧道消防给水宜采用高位消防水池供水的常高压供水系统;2)常规的隧道外常高压供水系统及稳高压供水系统在高寒高海拔超长公路隧道中无法实施,可考虑隧道内置高位消防水池的设计;3)隧道内置高位消防水池的数量、设置间距、设置高度等应根据隧道的长度、纵坡等综合考虑并进行水力计算后确定;4)隧道内置高位消防水池的常高压供水系统能解决这类隧道消防供水系统设计中管网严重超压的难题,具有供水安全可靠、施工难度较小、经济、环保等优点。

CDIO模式下一流专业课程实践教学改革探究——以给水排水管网系统为例

针对给排水科学与工程一流专业的人才培养目标,通过剖析给水排水管网系统课程教学现状和存在的问题,提出基于CDIO模式的创新实践教学体系。将项目驱动、“做中学”等教学方法引入给水排水管网系统课程实践教学,探索实践与理论深度有机融合的途径,提升学生对现代化管网系统的设计、运行及管理意识,为培养创新型人才提供思路和借鉴。

西北地区某市地下水供水管网黄水产生原因分析与控制技术中试研究

随着供水管道使用年限的增加,管网逐渐老化,管网化学稳定性问题日益突出。为解决西北地区某市高碱度地下水供水管网黄水问题,保障用水安全,开展了黄水产生原因分析与控制技术中试研究。一方面,监测黄水形成过程中水质特点和规律,对铸铁管腐蚀管垢成分进行分析,探明黄水形成原因。另一方面,搭建管网中试系统,研究了余氯、碱度、缓蚀剂对管网铁释放的影响。结果表明:黄水形成存在周期性规律,形成原因为水力冲刷增强导致管垢中的铁释放到水体中,水体存在一定的腐蚀性也会影响铁释放。管垢主要成分为Fe3O4和α-FeOOH,但不同管垢层形貌特征及化学组成存在差异。建议该地区管网余氯浓度控制在0.4 mg/L左右,余氯较高或较低均会促进铁释放。综合考虑效果和经济性,应对突发性黄水问题时,建议优先采用0.5 mg/L(以P计)的三聚磷酸钠作为缓蚀剂投加控制黄水现象。每吨水需增加药剂成本约为0.018元。

基于Android供水管网移动端巡检系统设计

目的解决传统的经验式供水管网巡检模式导致的巡检效率低、监控手段落后、抢险维修应急反应不及时和管网系统信息利用率不高等问题.方法分析供水管网现状,结合企业科技化需求,提出一种结合Arc GIS管网地理空间系统和SCADA管网监测点的监控系统,以Android移动终端为平台,利用终端GPS定位系统和4G网络通讯交互的现代化技术,以SOA设计理念和Ajax技术设计系统架构,利用UML序列法对供水管网巡检系统应具有的主要功能进行设计.结果构建集供水管网信息采集、巡检系统导航定位、管网事故抢险维修和系统信息管理为一体的供水管网移动端巡检系统.结论实现了供水管网巡检的高效智能运行,提高了企业信息化水平.

叠压供水系统对市政管网的影响分析

叠压供水充分利用管网余压进行变频恒压供水,具有节能、供水水质稳定等优点。然而叠压供水系统直接与市政管网相连,启动时会引起接入点及管网上下游的流量和压力波动,对市政管网输送水量变化和压力变化带来影响。以江苏省JT城区的市政管网为研究对象,采用EPANET软件执行延时模拟、HAMMER软件执行瞬时模拟,分析叠压供水系统对市政管网的影响程度和规律,并确定了两个评价指标:最低市政供水压力要求和系统接入点运行压降要求。结果表明,叠压供水系统对市政管网的影响与小区入住率、用水时段、叠压数量等因素有关;小区附近叠压供水系统数量越少、分布越稀疏,多叠压供水系统运行时接入点压降就越小。当实际应用中影响超出安全范围时,建议通过优化控制方式和供水方式缓解影响,保障供水安全。

市政给排水施工中的长距离顶管施工技术研究

以某工程为例,针对传统顶管施工出现的质量问题,分析顶管施工地面变形情况,通过工作井施工、穿墙施工、管道顶进施工、管线纠偏、土压平衡控制,有效控制长距离顶管施工工艺,以此提高施工效率与质量,提出新型施工技术。由实例可知,新施工技术在使用时,能够平衡控制土体压力,防止地面出现变形。

农村供水工程管网更新设计研究

农村供水管网已成为农村供水保障阶段提升农村供水安全性、稳定性的重要因素,目前却存在管网布局不合理、管径选择不当、管网材质劣质、设计理念滞后等问题。为研究农村供水工程管网更新设计工作,从规划、设计方案理念、评估指标等方面深入分析了农村供水管网的现状及其在设计中存在的问题,提出农村供水管网更新设计策略要落实“节水优先,空间均衡,系统治理,两手发力”的治水思路,管网更新设计方案同时要兼顾物理层面和功能层面的需要,引入量化供水、分区供水与漏损测度与管压、流量动态调整等技术,辅之以管网合理布局,管材因地制宜,进而形成整体设计框架。研究成果可为农村供水保障阶段的农村供水管网设计与实施提供理论和实践借鉴。

顶管技术在市政给排水工程中的应用研究

近年来,顶管施工技术的顶进距离不断增加,在埋深较大的工程中顶管技术也被广泛应用,需要顶管施工克服复杂地质条件限制,满足工程建设质量需求,确保工程施工效率。文章介绍了某给排水工程应用顶管技术进行长距离顶管施工的情况,分析了施工关键流程、施工操作要点,并对施工中的技术控制和问题处理措施进行了研究,旨在帮助技术人员了解顶管施工技术的要点,提升在市政给排水工程中顶管技术的应用水平,满足城市建设需求。

基于分布式光纤温度传感器的排水管网外来水监测试验研究

外来水的大量入侵对排水管网的健康运行造成了极大的负面影响,精准识别和定位外来水是实现管网低水位健康运行的首要任务。基于搭建的室内全尺寸排水管道试验平台,进行了不同温差、管道充满度、外来水占比三个变量下的分布式光纤温度传感系统(DTS)测量试验,探讨了DTS在不同运行工况下识别排水管道外来水的可行性及其测量结果的准确性。结果表明,DTS识别外来水的可行性主要取决于外来水的占比,温差主要影响混合后水流的温度,充满度则主要影响响应时间;DTS定位外来水的精度达到设定的0.5 m,时间响应精度可达十几秒,12组试验工况在典型测量点处的相对误差平均值均小于5%,标准差平均值小于0.2℃,整体而言,DTS测量的准确性较高。

基于供水管网水力模型的市政管网消防供水能力研究

为提高城市消防安全水平和火场救援的效率和质量,基于供水管网水力模型,对市政管网消防供水能力进行研究,利用算法分析计算应急状态下满足消防取水需求的市政管网最大消防给水量,得出市政给水设施在火灾条件下的实际给水能力。填补城市消防给水设施管理部门和消防实战应用单位之间的真空地带,解决各信息之间的“信息断层”和应用系统之间的“信息孤岛”问题,充分发挥城市消防给水设施效能,保障消防安全。

某区域污水管网提质增效改造工程实践

随着城市化进程加快,城镇排水管网的提质增效改造成为解决城市水环境问题的关键。以云南省宣威市老城区污水管网提质增效改造项目为例,探讨了城市老城区排水管道改造的技术路线和实践效果。首先,针对老城区管网错综复杂、信息缺失、污水处理厂进水浓度低、管网高水位运行等问题,提出了针对性的技术解决路线,通过绘图、检测、排查等措施结合人工普查及校核,建立了排水管网电子数据,对发现的问题进行归类形成问题清单。之后,通过实施改造工程,有效提高了污水收集率,全面提升现有排水管网的收集效能。对于重点区域污水直排口和错混接问题进行分型,对外水入侵进行了定量测算,并对各问题制定改造方案。通过区域改造工程,减少旱季生活污水排放入河量3500 m3/d,提高了重点治理区域的污水收集率,减少管网内水量水质波动。

调蓄水体及排口位置对城市管网排涝能力的影响研究

近年来城市内涝灾害频发,如何准确评估管网排涝能力,快速做出响应尤为重要。因此,结合不同区况特点,基于SWMM模型构建暴雨内涝模型,模拟分析不同工况下城区内涝情况,评估管网系统的排涝能力变化;并通过搭建物理实验平台,对不同工况下内涝结果进行分析验证。结果表明,研究区域在暴雨重现期大于20年一遇时,沿河排口位置变化对管网排涝能力影响不显著;大于50年一遇时,上游调蓄水体容积变化对内涝影响减弱;区域中排口位置于半淹没到全部露出水面状态变化时,发生大于2年一遇暴雨情况下,内涝变化程度最为明显;暴雨发生时当调蓄容积充满后,较大的调蓄水体可能对上游管网的液态变化造成更强扰动。研究可为暴雨期间城市防汛排涝提出指导性建议。

U-PVC管材的特征及其在给排水工程中的作用

文章通过对比不同管材的优缺点,重点阐述U-PVC管材的特征、在给排水中的应用、安装要求等,采取措施规避U-PVC管材的使用缺陷。通过材料优化及安装设计调整,不仅提升了U-PVC管材的综合性能,也降低了噪声、水通量小等缺陷的影响,保证了给排水工程的高效运作。随着材料科学的不断进步,新型U-PVC管材的优势更加显著,在给排水工程中被广泛应用。

盐渍土地区室外给排水管道设计探讨

盐渍土属于特殊土质,具有溶陷性、盐胀性和腐蚀性,这决定了室外埋地给排水管道设计的特殊性。结合天津市滨海新区某新建地块项目,分析项目场地的地质特征,重点阐述了盐渍土地区给排水管道的管材选取、管道及附属构筑物防水防腐设计。