Wuhan Zhaojiabao 220 kV power channel top pipe successfully started

Jimu Journalist Lu Rui

Correspondent Chen Jialun Wu Wei

On August 9th, with the slowly rotating of the knife tray, the 220 kV power channel "Voltage" of the Wuhan Zhaojiabao Power Channel "Venture", which was undertaken by the Second Aviation Bureau of the China Central Enterprise Enterprise Second Aviation Bureau, started from Huangpu Street, marking the subject of the project. The project enters a high -speed promotion segment.

Tube starting scene

Zhaojiajiao's 220 kV power channel civil construction project is a people's livelihood project that resolves the contradiction between the power supply and demand of residents in Wuhan and improves the quality of residents' electricity. The project is located in Wuhan Development Avenue and Huangpu Street. It starts along the River Avenue and ends at the intersection of Development Avenue and Zhongzhong Road. The construction content of Huangpu Street includes 18 tubes with a diameter of 25 cm and 2 pipes with a diameter of 12.5 cm in diameter of the top pipe tunnel of Zhongshan Avenue to the Construction Avenue. The top of the seat. After the entire line runs through, connects the 220 kV transmission line along the River Avenue to the intersection of the Zhonglou Road.

Tube starting scene

The entire project adopts a mud water balance top pipe machine with a digging diameter of 3.64 meters for construction. The device adopts a fully enclosed push method, which can effectively maintain the stability of the excavation surface, the soil disturbance around the pipeline is small, and can control the ground settlement well.

Yu Tao, the person in charge of the project of the Second Airlines Bureau of China Communications, said that compared with other types of top pipes, the total thrust of the mud water balance top pipe construction is small, and the top pipe is suitable for a longer distance. Because the unearthed method of the top pipe is continuously unearthed with hydraulic mechanization, the top speed is fast, and the adaptability to the soil is strong. Whether it is viscous soil or sandy soil, it can receive good results.

Digging diagram of the top pipe

In the face of the construction area near the main bridge area of ​​the Yangtze River Bridge and the elevated bridge ramps, such as existing structures, rich groundwater in the Yangtze River, complicated geological foundation pit precipitation, ultra -long -distance large diameter curve top, and the top pipe in the pink sand layer is difficult to control. In other difficulties, the project team of the Second Airlines Bureau has repeatedly organized internal and external experts to analyze and demonstrate, adopt a plan for optimizing the top pipe path, cancel the original D3 work well in the original design, increase the measures of deep precipitation and vacuum precipitation wells to reduce the groundwater level, and use the main top top to use the main top top Oil tanks, multiple relatives, and corrected oil cylinders to adjust the pose in time to promote the implementation of the project to ensure the smooth start of the "Said Number".

It is reported that this project is a key node project in the "Implementation Plan for the Construction of the World -Class -class Urban Power Grid", and it is also a key project of the three -year tackling plan of the first -class urban power grid construction of Wuhan City. The issue of "stamp" is very important.

(The picture is provided by the correspondent)

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