core reading
Combined with the actual conditions of the new and old urban areas, build comprehensive pipeline corridors and promote the entry of pipelines into the ground; build a unified platform to strengthen daily maintenance, and use scientific and technological means to improve the level of refinement; give full play to the role of the government and the market to reduce construction costs…
In recent years, Chongqing has taken multiple measures to strengthen the construction of underground pipe networks, bringing more convenience to people's lives.
Above ground, highways criss-cross; underground, pipelines are woven into a network.
The mountainous city of Chongqing has undulating terrain and its underground pipe network is more complicated than that of ordinary cities. How to weave this underground network well? Chongqing implements policies in different categories, focusing on the renovation of old pipe networks on one hand and the construction of comprehensive pipe corridors on the other. It uses “embroidery skills” and leverages scientific and technological means to strive to avoid repeated excavation of underground pipe networks and continuously improve the level of refined management.
Construction——
Comprehensive pipeline corridor built in new urban area
Old city promotes pipeline entry into the ground
In the west of Chongqing's central urban area, a new city, Chongqing Science City, is rising from the ground. On the drive, the sky was clear and the old manhole covers and telephone poles were gone. Under the road, there is a world of its own: the comprehensive pipe gallery is about one story high and two stories wide. The power, communication, water supply and other pipelines on both sides are in order, and the air is no different from the outdoors.
According to Xiao Yiyuan, on-site manager of Chongqing Science City Urban Construction Group Co., Ltd., the comprehensive pipe gallery is set about 10 meters below the ground. It is constructed of reinforced concrete and can accommodate various pipelines such as water, electricity, and communications. It is divided into comprehensive areas. and high pressure areas. In the comprehensive area, the water supply pipe is placed in the middle, and the communication network lines are arranged in layers on the wall brackets on both sides, such as store shelves. High-voltage cables are neatly placed in the corridor pipelines of the high-voltage area.
In the past, water, electricity, and communication lines were buried underground on both sides of the highway, making it difficult to find problems and costly to repair. “When encountering water leakage or power outage, the road has to be dug up repeatedly like a zipper every time, causing inconvenience to people's lives.” said Mo Tianzhu, deputy director of the Chongqing Urban Pipeline Comprehensive Management Affairs Center. Due to its age, workers are not familiar with pipelines, and sometimes careless construction can affect other pipelines.
Nowadays, with the comprehensive pipe gallery, it is clear which pipe has a problem when you walk into the underground comprehensive pipe gallery to check, and the maintenance is simple and convenient. After using intelligent equipment, the camera can automatically analyze the captured footage and accurately remind the location of the fault.
Since 2016, Chongqing has launched pilot projects for the construction of comprehensive pipeline corridors in seven districts and counties, including Liangping and Yunyang. As of March 2024, a total of 158.8 kilometers of integrated pipeline corridors for main and branch lines have been constructed, and 77.2 kilometers of comprehensive pipeline corridors for main and branch lines have been put into operation. It ranks among the top among provincial administrative regions in terms of construction length and built length.
Although integrated pipe corridors are good, their construction costs are high and construction is difficult. “Comprehensive pipe corridors take up a lot of space and are suitable for newer urban areas and are built together with roads.” Mo Tianzhu said that Chongqing implements policies in different categories to build comprehensive pipe corridors in new development areas such as high-tech zones, while in old cities it is combined with the steady renovation of old cities. Realize that pipelines are put into the ground and gradually improved.
In the old community in the Wanfeng Industrial School area of Wulitian Street in Jiangbei District, a large number of old overhead pipelines are abandoned and no one is recycling them. In addition, with the gradual increase of emerging pipeline facilities such as network and optical fiber, the “spider web in the sky” is getting denser and denser. Therefore, when promoting the renovation of old residential areas, the Jiangbei District Housing and Urban-Rural Development Committee simultaneously promoted the work of laying communication cables into the ground, and coordinated with the four major communication operators to make full use of the old underground pipelines, build new ones first, and then cut the old ones, and connect all the communication lines in the air. All the cables are underground, which beautifies the city and facilitates maintenance.
maintain–
Collect pipeline information
Build management system
The underground pipeline network must be constructed scientifically and carefully managed.
In the past, due to the complexity of underground pipelines and different management departments that did not understand each other, the same section of road might be excavated repeatedly. “When excavating a small section of the road, we will encounter more than a dozen underground pipe networks,” said a construction project leader.
The Chongqing Municipal Housing and Urban-Rural Development Commission collects information on various pipelines, builds a pipeline protection and management system, and develops an “e-Hutong” platform to facilitate everyone to communicate with each other and make underground pipelines clear at a glance.
Not long ago, a section of water pipes needed to be repaired on Xinpaifang 3rd Road in Yubei District. The project staff used the “eHutong” platform to publish project information and apply to understand the location and direction of underground pipelines involved in the road section. The system automatically matched the relevant ownership units. , and required each unit to respond within 5 working days whether the pipelines under its jurisdiction were involved, whether there were simultaneous construction needs, etc., greatly improving communication efficiency.
“After accurately understanding the direction of the underground pipelines, we carefully constructed the work to avoid damaging other pipelines. We used manual excavation near the pipelines and mechanical work in other areas.” The engineering staff said that after some industry players reported the need for simultaneous relocation, the two units collaborated construction, reducing the impact on traffic and the public, and completing it quickly.
Since Chongqing launched the construction of “eHuTong” in 2020, the platform has registered 335 management departments, 521 ownership units, and 157 construction and construction units. Tens of thousands of feedback messages have been received, and the number of third-party accidents has dropped significantly.
Careful management must also draw on technology. The detection robot crawls on the underground pipeline, and the “driver” on the road can watch the detection screen of the inner wall of the pipeline in real time through a tablet computer.
“Just like taking a CT scan, there is no need to dig roads and send workers down wells to check the underground pipe network.” Mu Songwen, site manager of the Qijiang Project of the Southwest Company of China Construction Second Engineering Bureau, said that in the past, it took one month to dig pipelines. It can be completed in about 4 days, and the cost is reduced by 30 to 40%.
The system has also been continuously improved. Chongqing has launched provincial government regulations for comprehensive utility corridor management – “Chongqing Urban Comprehensive Utilities Management Measures” and continues to improve the comprehensive utility corridor management system.
Improve efficiency——
Improve supporting policies
Reduce construction costs
Surrounded by four mountains and three troughs, the central urban area of Chongqing can be divided into three major troughs. The old city is mainly located in the central trough, and the east and west troughs are mainly the new urban areas under construction.
“The advantages of comprehensive pipe corridors are obvious. New urban areas can be promoted and applied according to demand, and planning is done in advance, and they can be promoted simultaneously with new roads.” He Qiang, dean of the School of Environment and Ecology of Chongqing University, said that the one-time investment of comprehensive pipe corridors is large, and every kilometer The cost is high, but in the long run, the comprehensive pipeline corridor can avoid repeated excavation of roads during pipeline expansion and repair, coordinate the operation and maintenance of pipelines, have high safety, and can effectively ensure the safety of urban lifelines.
High construction costs are a problem that needs to be solved in the construction of comprehensive pipe corridors. “In the construction stage, the government must play a major role. In the operation stage, it relies more on market forces to collect 'rent' from units using pipe corridors such as water supply, power supply, and communications, including entrance fees and daily maintenance fees. We must strive to recover the construction The cost and the rental pressure of the units using the pipe gallery should also be considered, and try to find the best balance point.
In addition to government investment, Chongqing has also innovated the comprehensive pipeline corridor investment and financing model, guided financial institutions to support it, and issued ultra-long-term, low-interest loans. For example, the first phase of the Kaizhou District Comprehensive Pipe Gallery has a total investment of 480 million yuan, which is constructed using the public and social capital cooperation (PPP) model. The social investors are China Construction Fifth Engineering Group and China Construction Tunnel Consortium, and the Chongqing Branch of China Development Bank issued funds for the project. Loans of 218 million yuan.
According to the relevant person in charge of the Chongqing Urban Pipeline Comprehensive Management Affairs Center, the next step will be to improve the institutional framework for investment, financing, and property rights management in the construction of comprehensive pipeline corridors, clarify the responsibilities and obligations of all parties, standardize pipeline entry fee standards, reduce the financial burden of various localities, and more Proper construction and maintenance of comprehensive pipe corridors will bring more convenience to the people and enterprises.
“People's Daily” (Page 15, May 9, 2024)
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