Talking about the construction and management of urban sewage pipe network?

Urban sewage pipe network is an important infrastructure of the city, the key to sewage collection and centralized treatment, and the necessary means for sewage treatment to protect water resources and improve the environment. Due to the constraints of urban construction, economic conditions and management methods, the construction and management of urban sewage pipe network in China are generally relatively backward, and the problems existing in its construction and management are increasingly prominent. These problems are mainly manifested in the mismatch between sewage pipe network and sewage plant, too conservative design, too low influent concentration of sewage plant, unclear sewage source, incomplete rain and sewage diversion, and inadequate maintenance. How to solve these problems is also a problem that we must face and think about at present.

1. Scientific and rigorous drainage professional planning has important guiding significance for the construction of urban sewage pipe network.

At present, urban construction planning has become a * * * knowledge, and drainage professional planning is generally available. However, as a quip says, "the plan has not changed quickly, nor has it changed quickly", some plans still lack rigor and scientificity. One is that the leadership has changed, the thinking has changed, the completed plan has to be repeated, and the plan has no continuity; The second is that the planning is big and empty, the planning depth is not enough, and the operability is not strong; Third, the planning of the same city or region is not unified, the professional planning is not coordinated with the overall planning, and there is a lack of chess awareness; Fourth, the planning is not rigorous. It is clear in the planning and design that sewage pipes will be built along the road, but some departments cancel the implementation of sewage pipes or sewage branches without authorization because of engineering investment and other problems. After the completion of roads or surrounding buildings, it will bring great difficulties to the later implementation of sewage pipelines, and may even change the layout of regional sewage pipelines. In this regard, a unified coordination mechanism should be established, and a responsible subject should be responsible for revising the professional planning as much as possible, expanding the scope and depth of the planning, highlighting the integrity, systematicness and rigor of the planning, and deeply studying the construction of new urban areas, the transformation of old urban areas, the wastewater management planning of urban chemical enterprises, the wastewater management planning of pharmaceutical industries, the wastewater management planning of suburban towns, and the application of regional small sewage treatment facilities. According to water pollution, urban sewage discharge and treatment, urban and rural economy. Overall planning of regional sewage treatment, especially between suburbs, urban areas, urban areas and development zones, to avoid blank areas or dead ends. Further study the sewage interception and industrial sewage treatment methods in the old city, and continuously improve the sewage collection rate and treatment efficiency. Once the plan is passed, it is necessary to establish its strong guiding position, and the planning and construction department should ensure its smooth implementation through administrative means.

Two, to further strengthen the unified leadership of sewage pipe network work, to achieve overall planning and sustainable development.

Third, raise funds through multiple channels to speed up the supporting construction of sewage pipe network.

Four, pay attention to the construction and management of the drainage pipe network in the old city, and rationally implement the transformation of sewage interception and diversion.

Five, a comprehensive survey of the status quo of the pipe network, clear property management, the implementation of responsibilities and objectives, effectively play the effectiveness of the existing pipe network.

Sewage pipe network belongs to underground facilities, which is difficult to manage and maintain. The general situation of sewage pipe network is unclear, which is mainly caused by multi-head construction management, which makes some existing pipe networks in an unmanned state, and even some construction units can't tell the location of pipeline construction, whether it is connected to the power grid, how big the pipe diameter is, and whether it is damaged or blocked. All these bring some difficulties to the follow-up management, which makes the completed pipe network unable to play its due role and adversely affects the overall planning.

In view of these problems, we should coordinate relevant construction departments to collect completion data, take on-the-spot investigation and other measures, try our best to find out the present situation of sewage pipe network, further clarify the scope of property rights management of sewage pipe network, open key nodes as planned, make the completed sewage pipes run in a network, and fully improve the efficiency of sewage collection and transportation. At the same time, according to the present situation, gradually establish a set of evaluation standards for pipe network facilities, formulate different maintenance or update standards, and manage and maintain them under the premise of economy and rationality.

Six, strengthen the source management, combined with the sewage permit system, and gradually establish a file of key polluters.

In the operation of sewage pipe network, we often encounter the problems of illegal discharge and excessive discharge. In this case, it is generally difficult to find the pollution source, which may cause serious stability to the operation of sewage pipe network and sewage treatment plant, especially the combined interception pipeline may also pollute the river and cause pollution accidents. Therefore, we should actively promote the comprehensive acceptance of construction projects, and on the basis of the existing comprehensive acceptance, gradually establish the system of review, filing and licensing of sewage takeover. Through the understanding of sewage users' drainage quality, sewage discharge capacity, sewage outlet setting and characteristic pollutants, sewage files are gradually established, and sewage users' classification system is established according to sewage discharge capacity and pollutant characteristics, and different management measures are implemented for different levels of sewage users to realize the source control of sewage discharge and further ensure the stable operation of sewage pipe network facilities and treatment facilities.

Seven, pay attention to the maintenance of sewage pipes, increase investment in the maintenance of sewage pipe network, and effectively strengthen the maintenance and management of existing facilities.

At present, the situation of super-management transformation of urban sewage pipe network is still widespread. The maintenance investment of sewage pipe network is relatively small, which leads to a single maintenance method. The maintenance and management of the existing pipe network is not strong enough, the method is wrong, the necessary detection means are not adopted, and a scientific, systematic and periodic mechanism is not formed, which leads to many diseases in the pipe network. For example, daily dredging is mainly manual, which increases the labor intensity of workers and is prone to safety accidents. The pipeline is blocked, the location and situation of blockage are unclear, and the dredging means are limited; Pipeline damage maintenance is not timely, and the maintenance method is single. With the popularization of sewers and the improvement of urbanization level in China, the aging and damage of pipelines will be more and more. In order to avoid all kinds of losses and inconveniences caused by pipeline damage, the pipeline must be maintained in a planned way and inspected and repaired regularly. Among them, the most important thing is to strengthen the popularization and application of new technology, change the original management and maintenance concept of drainage pipe network, make the maintenance management mode gradually transition to mechanization, and constantly adopt new technologies and new processes to effectively improve the work efficiency of drainage pipe network and create greater social, environmental and economic benefits, which is also the inevitable trend of the development of the whole drainage industry.

Eight, standardize the construction behavior of sewage pipeline construction enterprises, strict project completion acceptance and project handover management.

As we all know, there are still some common quality problems in sewage pipeline construction, such as the construction unit changing the construction drawings at will; The as-built drawings are inconsistent with the actual construction; The quality of pipe joint is not good, and there are problems such as broken line and displacement; Set the water head for the inspection well to pass the closed water test or stop the water supply; The head is not completely removed, and a small hole is opened; During subgrade construction, stones or lime soil are filled into the inspection well, and even the inspection well is leveled and covered on the subgrade; After the foundation of the inspection well, the backfill of the surrounding earthwork will cause random and obvious settlement of the inspection well, and so on. All these situations bring serious hidden dangers to the safe operation and maintenance management of sewage pipe network, so it is necessary to strengthen the management of sewage pipe network, especially the supporting roads of sewage pipe network or other municipal engineering construction activities. When the property right is transferred, the receiving unit shall request to transfer the completion data, check the accuracy of the completion drawings and the on-site closed water test, drain or lower the water level in the inspection well (the nozzle is exposed at least 1/3), and comprehensively inspect the construction quality of the well and pipeline.

Nine, sewage pipe network operation and maintenance market management is also a development trend.

With the development of sewage treatment industrialization in recent years, urban sewage treatment plants are facing restructuring one after another, and it is imperative to separate plants from networks. At present, the common form is that the sewage treatment plant is operated by the project company and the pipe network is managed by the government or municipal management department. Under the premise of streamlining administration, it is not appropriate to add a comprehensive institution responsible for construction, operation, maintenance and management. Therefore, the competent department can try to entrust the operation management, inspection and maintenance of sewage pipe network and sewage pumping station to a more professional company, and the competent department can devote more energy to deepening management and refining services with fewer personnel to achieve a win-win situation of reducing operating costs and improving social benefits.

Concluding remarks

Urban sewage pipe network is an important infrastructure of the city, and the construction and management of sewage pipe network is a subject that urban development must face. The problems existing in its construction and management are also worth studying, and it is worthy of in-depth discussion and thinking by the majority of construction and managers.

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