Recently，With the main engine weighing 230 tons down to the bottom of the foundation pit.，The world's largest shaft boring machine“Dream”Go down the well safely in the underground intelligent garage project in Jing'an District, Shanghai，It laid a solid foundation for the smooth start.。

“Dream”Go down the well site

Jointly built by China Railway Construction Heavy Industry and China Railway 15th Bureau“Dream”Set excavation、Slag tapping、Support、Guidance and other functions are integrated.，It is suitable for the construction of ultra-large diameter shaft engineering in soft soil and soft rock strata.。The overall technology of the equipment has reached the international advanced level.，It is the largest diameter shaft boring machine in the world.。

The smart garage in Jing'an District of Shanghai covers an area of only 286 square meters

In recent years，Speeding up the Construction of Sponge Cities、Underground smart garage and other livelihood projects，Extra large diameter、There are more and more ultra-deep shaft projects。Before，Domestic and foreign enterprises have developed shaft boring machines with excavation diameters of 13 to 14 meters.，Used for construction of mechanized open caisson engineering，However, it is the first time in the world to develop a super-large diameter shaft boring machine with an excavation diameter of 15 meters or more.。

In order to meet the needs of super-large diameter excavation，At the same time, the efficiency of shaft excavation is ensured.，The R & D team of Railway Construction Heavy Industry has broken through the design technology of complete set of mechanical caisson equipment for super-large diameter shaft.，The reliability of the underwater environment construction of the equipment is strengthened.，The problem that the sinking attitude of the traditional open caisson is difficult to control is solved.。Compared with the traditional open caisson construction method of manual excavation,，“Dream”Mechanized open caisson operation can realize unmanned underground、There are few people on the ground，Reach the well builder“To drill a well without going down”The goal of，Construction cost savings 50%Above，Effectively improve the safety of construction operations。

“Dream”Offline site

It is reported that，The underground intelligent garage in Jing'an District of Shanghai covers an area of 286 square meters.，The underground area is 1408 square meters，There are 19 floors，It is planned to build two buildings with a diameter of 23 meters.、Deep foundation pit shaft with a buried depth of 53 meters，152 mechanical parking spaces for each well，The ground is the garage access floor and equipment room.，After completion, it will become the world's largest diameter vertical underground intelligent garage.