The shengding road project - The Forerunner - is set to begin with a large diameter mud shield

On July 7, the project of Shengsi to Dinghai Road from Putolu Jiashi to Donggang Road started successfully, marking that the project officially entered the construction stage of shield and began to cross the river and the sea.

Shengsi to Dinghai Road Putolu Jiashi to Donggang Road project is located in Putuo District, Zhoushan City, Zhejiang Province, near Putuo Mountain national scenic area. The construction technology includes open excavation, hidden excavation and shield tunneling. The undersea tunnel is constructed by shield tunneling, which is the first large shield tunneling across the sea in Zhoushan city. The right and left lines pass through Shenjiamen Port twice. The left line tunnel is 770 meters long, and the right line tunnel is 762.712 meters long, with a total of 1532.712 meters. A muddy water shield machine with a diameter of 11.7 meters is used to dig the left line tunnel from the starting well of Lujiazhi to the north, and then the receiving well of The side of Shenjianmen is hoisted out and transferred to the receiving well of Lujiazhi. The right line tunnel is tunneled again and hoisted out after reaching the receiving well of Shenjianmen. The geological conditions in this region are complex, mainly consisting of fluid-plastic silty clay layer, soft-plastic silty clay layer and tuff. The shield segment also needs to pass through lujiazhi seitan, fishing boat wharf pile pulling area, Shenjimen Port and other structures, so the construction is of high safety risk and high technical difficulty.

To ensure that the "leading" smooth starting of shield machine, shield the division adhere to the "epidemic" and the principle of "production construction, balance, through the advance planning and scientific organization, the careful arrangement, special leading group, set up the shield originating refinement goal originating node, control of shield assembly quality, ensure safe and efficient originating process. The project adheres to the 24-hour shift system of the leaders. In the critical stage of the demolition of the cave gate and the initiation of the shield tunneling machine, the division of labor and responsibility should be clearly assigned to the personnel, and the exemplary leading role of the leading cadres should be actively played to ensure the safety technology, construction plan and emergency plan before the initiation of the shield tunneling machine can be guaranteed. Insist to hold a meeting every day, sort out all kinds of difficult and miscellaneous diseases encountered during the initial period, to ensure that the problems are solved in the first time, to play a good "shot in the arm" for the construction organization; The training of shield operators should be strengthened, and the awareness of safety responsibility of all employees should be further enhanced through safety speech before shift, technical disclosure, safety education and training and other measures.