Recently，China Railway Construction Heavy Industry and Shanghai Urban Construction Municipal Engineering Co., Ltd.（Group）The caisson shaft boring machine built by the company successfully completed the first shaft boring within 25 days.，At the same time, the highest class footage was 1..8m，Maximum daily footage 2.6mThe results of。This is the first appearance of domestic shaft boring machine in water project.，It is also a continuation of rail transit.、Another successful application in the field of underground garage。 

Successful Application of Open Caisson Shaft Tunneling Machine in Water Project

It is understood that，Shanghai Taihe Sewage Treatment Project includes#30、#31Two vertical shafts，Inner diameter of working well structure 8m，Vertical excavation depth up to 35.9m。The construction site is located in the central area of Yanghang Town，And the adjacent area is densely built.、Large flow of people and vehicles，Site construction conditions are severely restricted。Diaphragm wall is usually used as the enclosure structure in the construction of traditional deep well，This not only requires a huge construction site.，It will also have a greater impact on the surrounding environment.。Therefore, in such a narrow space as the core area of the city,，Traditional methods are difficult to apply.。

Aerial view of construction location

In view of the above construction difficulties，China Railway Construction Heavy Industry Co., Ltd. set up a special research and development team for shaft roadheader，Overcome the high pressure-bearing sealing design、Control integrated design、Hydraulic lifting high-precision control design and many other key technologies，And successfully applied to the device.。At the same time，The team also simulated the actual construction conditions.，Synchronization of oil cylinder push-pull、In-plant tests such as main engine lifting synchronism test，Finally, it has completely independent intellectual property rights.、Set high technology、High efficiency、High quality is the most important tool of the country.。

The complete open caisson shaft boring machine is provided with 10barHigh pressure bearing capacity，Up to 80mExcavation requirements for shaft depth。Its pump station and control system are modular design.，Cooperate with precise cooperation on site，Without interfering with the passage of people and vehicles around.，Successfully completed 500㎡Starting from a super small venue。During shaft construction，The shaft can be lowered synchronously with the host machine to support the well wall，So that that maximum value of the ground surface settlement dure the tunneling is control to be 5㎜Within，Compared with the traditional construction method, the influence on the surrounding soil is greatly reduced.，And that construction safety coefficient is obviously improve.。In addition，Railway Construction Heavy Industry has also carried out overall noise reduction treatment for the hydraulic pump station.，Create a good construction environment for the construction personnel。

Host originated

It is reported that，#30 and#After completion of Well 31，The equipment will also be used in the construction of another three shield wells in the Shanghai confluence project.，Continue to contribute to the construction of sewage treatment projects in Shanghai，To contribute to the improvement of people's livelihood and environment in Shanghai。Railway Construction Heavy Industries will also continue to provide more high-quality equipment for the market.，To build a modern industrial system，Make greater contributions to the development of new quality productive forces。