This year's work report of Chengdu municipal government proposes to optimize and improve the urban functional quality, strengthen the construction of sponge city and underground comprehensive pipe gallery, and increase the comprehensive development and utilization of underground space. Our city will build a modern and new-type integrated urban corridor system of "domestic demonstration, leading the west, multi-level and networking".
Underground comprehensive pipe gallery is equivalent to "home of underground pipeline"
Chen Shunzhi, deputy director of the Municipal Construction Commission, said that the underground comprehensive pipe gallery refers to the public tunnel used for centralized laying of power, communication, radio and television, water supply, drainage, heat, gas and other municipal pipelines underground in the city. The construction of urban underground comprehensive pipe gallery is equivalent to the construction of a "home of underground pipelines". As long as the pipelines (including "aerial cables") are laid in the urban underground, they must pass through the pipe gallery.
"In terms of scale, the underground utility tunnel can be divided into four categories: trunk underground utility tunnel, branch underground utility tunnel, cable utility tunnel and micro utility tunnel. In the case of ample construction space, for the convenience of corridor detection and maintenance, the main line pipe gallery can be designed with maintenance lane, which is mainly used for professional vehicles for internal detection, maintenance and construction of the pipe gallery. Considering the new and old urban areas, geographical conditions, road sections and other factors in Chengdu, the underground comprehensive pipe gallery project is divided into two categories: the new municipal road project and the old urban municipal road reconstruction and expansion project, and each category of pipe gallery is divided into "large and medium-sized comprehensive pipe gallery", "small comprehensive pipe gallery", "micro pipe gallery" and "cable pipe gallery" according to the access pipeline, so as to achieve the control of differentiation index System. " Zhong Xiang, President of Chengdu Municipal Engineering Design and Research Institute, said.
At present, Chengdu has issued the guidelines for the design of Chengdu underground comprehensive pipe gallery, which specifies the applicable conditions of various pipe galleries. The new road projects in the new area focus on the selection of "large and medium-sized comprehensive pipe gallery" in combination with the main line Municipal Gallery, and other types of pipe galleries are effective supplements. The old urban and municipal road reconstruction and expansion projects focus on the selection of "small comprehensive pipe gallery", "micro pipe gallery" and "cable" Pipe gallery.
The underground pipe gallery of chengluo Avenue can let two trains pass through
According to Chen Shunzhi, at present, some underground comprehensive pipe corridors have been formed in our city. Such as the underground comprehensive pipe gallery of Riyue Avenue, with a total length of about 5.5km. Among them, the length of industrial prefabricated assembly section is about 1.7km. By assembling the main body of the industrial prefabricated pipe gallery, the construction quality and efficiency are greatly improved, the construction period is shortened, the environmental and noise pollution caused by the construction is reduced, the comprehensive construction cost of the underground comprehensive pipe gallery is greatly reduced, the influence of traffic organization is reduced, the project quality is improved, and the construction period is shortened.
"The underground comprehensive pipe gallery of chengluo Avenue is the first expressway to implement the construction of comprehensive pipe gallery synchronously in the downtown area of our city. Under the pavement, there is a pipe gallery with an outer diameter of 9.3m and an inner diameter of 8.1m, which is enough space for two harmonious EMUs to pass through. The 9.33m large-diameter shield construction method is adopted, and the gallery body is assembled with industrial prefabricated plates, making it the underground comprehensive pipe gallery project with the largest shield diameter in China. The non excavation method of shield construction can minimize the impact of construction on the underground water system, surrounding environment and urban traffic, fully reflecting the green and innovative concept of urban development. " Zhong Xiang said.
Intelligent management of pipeline is set up with robot for all day patrol inspection
When it comes to the management of the underground comprehensive pipe gallery, Chen Shunzhi said that the intelligent management of pipelines will be realized: "in addition to the construction of the main structure, which is what we call the civil engineering system of the comprehensive pipe gallery, the construction of the pipe gallery also includes the wiring, electrical, fire fighting and drainage systems of the comprehensive pipe gallery, and there are also environmental monitoring, video monitoring, access control, alarm and other subsystems inside. All the systems are integrated on one platform to ensure the independent operation of the subsystems. At the same time, the functions, services, signaling and pages of each subsystem are integrated into one platform for display. The monitoring screen monitors 24 hours. Once the pipeline leakage is found, it automatically jumps out of the real-time video of the accident for alarm. The personnel on duty click the alarm on the same screen and click the broadcast to form an integrated prevention and control, one-stop management It improves the efficiency of emergency handling. "
"The intellectualization of urban comprehensive pipe gallery is also an important part of the construction of smart city. By building an intelligent management platform, monitoring hardware, BIM, big data analysis and other means are integrated to ensure the operation and maintenance efficiency and stability of the pipe gallery." Zhong Xiang said, for example, the inspection robot and intelligent sensor of the pipe gallery inspect and detect the "physical condition" of the pipe gallery all day long. When they find "physical discomfort", they immediately send a help signal to the management personnel to ask for "medical treatment" to avoid pipeline accidents. At the same time, the managers use Bim and big data analysis technology to simulate the running state of the pipe gallery through the three-dimensional visual management interface, which can predict the possible faults of the pipe gallery and prevent them from happening.
It is understood that with the evolution of Chengdu's urban spatial pattern from "single center" to "multi center", Chengdu's underground comprehensive pipe gallery has gradually improved into a network leading the development of "one center, two wings, three axes and multi center". "At present, in accordance with the new urban pattern, we are stepping up the revision of the special plan for the underground comprehensive pipe gallery. In combination with the development and utilization of underground space, various underground pipelines, road traffic and other special construction plans, we are reasonably determining the construction layout, types of pipelines, cross-section, plane position, vertical control, etc. of the underground comprehensive pipe gallery, defining the construction scale and time sequence, and comprehensively considering the urban development Vision: Reserve and control relevant underground space, follow the principle of "full coverage, three combinations, four promotions, classification into corridors", and enhance the scientificity and feasibility of planning. The city plans to form a comprehensive pipe gallery system, with a total length of 1084 kilometers. " Chen Shunzhi said.
