Recently，Domestic minimum diameter developed by China Railway Construction Heavy Industry（φ914mm）Acceptance and offline of rapid topping machine，The equipment will be exported to Thailand to participate in the Bangkok natural gas pipeline laying project.，Securing the supply of natural gas to the power plant south of Bangkok。 

Domestic minimum diameter quick topping machine

The construction of this project is very difficult.，The construction of the ultra-small diameter pipeline is divided into a plurality of long sections.，Pipe diameter onlyФ914mm，Maximum interval length up to 1km，It is a steep slopeVType longitudinal curve crossing construction，Extremely high requirements for equipment reliability and measurement and control guidance accuracy。For this reason，China Railway Construction Heavy Industry Co., Ltd. overcomes related technical problems，The super-small diameter fast roofing machine is developed.，Provide a strong guarantee for the implementation of the project。

The whole acceptance process is carried out simultaneously by offline and online live broadcasting.，Thai owner、The general contractor and the subcontractor are listening to the overall R & D and manufacturing process of the equipment by China Railway Construction Heavy Industries.、After production quality control, etc.，Test on the host、Examine and verify the test of pipe pusher and other items.，Strong R & D and design of the equipment performance and railway construction heavy industry、Production strength has been fully affirmed.，Passed the acceptance test smoothly。

It is reported that，The rapid roof-laying machine consists of two major parts: the roadheader and the pipe pusher.，Tunneling with TBM，The pipe pusher clamps the pipe and pushes it into the formation.，Tunnel excavation is realized、Pipeline laying is carried out at the same time。Compared to conventional directional drilling and pipe jacking，The construction method has higher construction efficiency.、Wider geological adaptability、The construction process is safer and more reliable。

Schematic diagram of equipment crossing

Successful offline of this device，It has refreshed another record of Railway Construction Heavy Industry in the field of direct pipe-laying equipment development.，Previously developed by China Railway Construction Heavy Industriesφ1219mmThe rapid topping machine has created a daily footage of 191 in a crossing project of the eastern route between China and RussiamConstruction records。

Coming up，China Railway Construction Heavy Industries Co., Ltd. will take the opportunity of the acceptance of the export of Thailand's rapid top laying machine.，Make every effort to ensure the follow-up work，Lay a solid foundation for future cooperation between the two sides。