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Optical Fiber Emergency Telephone System in the Roadway Underground Utility Corridor Tunnel

Optical Fiber Emergency Telephone System in the Roadway Underground Utility Corridor Tunnel
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Attentive citizens, when passing the Changjiang Road recently, they will find that many sections on the north side of the road have been surrounded by white construction fences, and the sound of large mechanical work is often heard inside. The key underground project-the underground comprehensive pipe gallery project of Changjiang Road. The project has a total length of 3 kilometers and is a city "lifeline" that walks underground. Today, we will take you to the on-site exploration class.

Why build a comprehensive gallery

As for why the Yangtze River Road underground comprehensive corridor is to be built, it may still be necessary to start with the Shanghe Hangwu Lake Yangtze River Railway Bridge under construction in full swing. In order to fully take advantage of the river crossing function of the Highway Bridge, the highway bridge needs to be bridged across the Yangtze River. It extends to the end and connects to the urban skeleton road network. Therefore, the construction of the Yangtze River Road viaduct connecting the highway bridge and the north-south side of the highway bridge becomes the key.

Because it is located in the city center, in order to ensure elevated roads and carry out elevated construction, it is necessary to carry out ground treatment on the Yangtze River Road's overhead high-voltage lines to free up more ground space, so it is necessary to build the Yangtze River Road underground. Comprehensive pipe gallery to accommodate high-voltage power lines and other municipal pipelines. At present, the Yangtze River Road elevated and underground comprehensive pipeline corridor projects have all been handed over to the China Railway Bridge Bureau Group for construction.

The Shanghe-Hangzhou Changjiang Road elevated and underground comprehensive pipe gallery project starts from the north side of Tianmenshan Road to the south side of Zhongshan North Road. The construction content of the project includes three major parts of the elevated bridge, comprehensive pipe gallery and roadway project. The total bid price was about 845.7 million yuan, of which the pipe gallery part was 200 million and the elevated part was 640 million. Construction started in October 2017 with a contract duration of 780 days.

What is the underground comprehensive pipe gallery

Project Engineering Minister Wang Jun said that what they built first was the underground comprehensive pipe gallery. The so-called urban underground comprehensive corridor. That is, a tunnel space is built under the city, which integrates various engineering pipelines such as electricity, communication, gas, heating, water supply and drainage, etc., with special maintenance ports, lifting ports and monitoring systems, and implements unified planning, unified design, Unified construction and management is an important infrastructure and "lifeline" that guarantees urban operations.

The role of the underground comprehensive pipe gallery

The underground comprehensive pipe gallery system can not only reduce the occupation of above-ground space by overhead pipelines, solve the problem of urban traffic congestion, but also greatly facilitate the maintenance and repair of municipal facilities such as electricity, communications, gas, water supply and drainage. Avoid frequent road excavation due to laying and maintenance of underground pipelines, which will affect traffic and residents ’travel, and keep the road volume intact and beautiful. Reduced the cost of multiple road surface repairs and maintenance of engineering pipelines. Maintains the integrity of the road surface and the durability of various pipelines.

Changjiang Road Underground Comprehensive Pipe Gallery

According to Wang Jun, the Changjiang Road underground comprehensive pipe gallery project is located below the existing sidewalk and slow lane on the east side of the Changjiang Road, starting from the north side of Tianmenshan Road in the north and north of Zhongshan North Road in the south. Round structure with a width of 3.3 meters and a height of 4.7 meters. The corridor pipelines include 110KV high-voltage lines, 10KV high-voltage lines buried underground on Changjiang Road, and communication signal lines along the lines, military, civilian optical cables, low-voltage cables, and self-use pipelines.

Pipe Gallery Features

Most of the entire pipeline corridor is for deep foundation pit support and excavation. However, there are three sections of pipe jacking construction with a total length of about 600 meters and an inner diameter of 3.5 meters at the intersection of Tianmenshan Road, Chizhushan Road, and Laoshan Road. Due to the close distance between the construction red line and the surrounding buildings, the use of cut-outs will have a greater impact on the foundations of surrounding buildings and the daily lives of residents. This kind of jacking pipe with an inner diameter of 3.5 meters is also used for the first time in the construction of domestic pipe corridors, and has the role of industry demonstration.

Construction Schedule

It is understood that the construction of the underground comprehensive pipe corridor project of the Yangtze River has begun. Among them, the maintenance piles of Tianmenshan Road and the vicinity of 27 Middle School have been excavated and are currently being excavated. The main construction will be carried out next; Half of the construction; related pipelines near the section of Wanjiang Yaju are being renovated. The maintenance pile on the west side has been completed. Construction of the maintenance pile on the east side is being prepared. The section from the 27th to the Huishang Fortune Plaza section has been mostly completed. Pipe jacking at three intersections, two of which have already started the construction of bored piles for pipe jacking, and pipe jacking is being prefabricated in the factory.

Difficulties in construction

Wang Jun also said frankly that because the Yangtze River Road is located in the bustling city center, the underground pipelines are complicated and the relocation is difficult. In addition, the progress of land requisition and demolition of buildings within the red line is relatively slow. Lag. Now they are actively communicating and coordinating with the local government and relevant departments, and strive to solve the above difficulties smoothly, so as to ensure the steady and effective progress of the project.

When will it be completed?

According to Wang Jun, the Yangtze River Road viaduct and the underground comprehensive pipe gallery project will be completed and delivered synchronously in the Shanghe-Hangzhou high-speed rail. It is expected to be completed by the end of December 2019.

After the completion of the Yangtze River Road viaduct, it will be connected to the Shanghe-Hangzhou-Wuhu Public Railway Bridge highway bridge, which will facilitate north-south traffic on the Yangtze River and improve the city's road network. The commissioning of the underground comprehensive pipe corridor on the Yangtze River Road will not only ease road traffic congestion on the ground, It will also facilitate unified and standardized management of urban pipelines.