Recently，The slurry balanced pipe jacking machine built by China Railway Construction Heavy Industries Co., Ltd. rolled off the production line in Changsha, Hunan and passed the acceptance test smoothly.，It marks the first time that the domestic pipe jacking machine has entered the Colombian market.，It has further enhanced the global influence of China's equipment.。

The equipment is offline

The total length of the municipal sewage treatment project in Bogota, Colombia is about 2.1 km，Undercrossing the Bogota River，Mainly crossing sandy clay、Clayey sand、Clay and other strata，Buried depth of tunnel roof is about 7-11 meters。The project has poor stability of crossing stratum.、Unsmooth slagging in clay formation、The small working well starts、Long single jacking distance and other key and difficult points of the project。

According to the characteristics of this project，The R & D team of Railway Construction Heavy Industry has configured a number of independent core key technologies for the pipe jacking machine.，The cutter head adopts the panel design with small aperture ratio.，Equipped with high speed and high torque hydraulic drive and high power and large displacement circulation system，Can meet that safety requirement of complex formation、Efficient jacking construction。

The pipe jacking machine will be disassembled and shipped to the construction site.，After completing the assembly and commissioning of the whole system，Formally start tunneling。Railway Construction Heavy Industry will continue to give full play to its professional and technical advantages.，Sincere service with rich experience，High quality for the project、Provide strong guarantee for safe tunneling。

China Railway Construction Heavy Industry Co., Ltd.“Time and space for scientific and technological innovation”Idea，Independently developed retractable tube curtain machine、Top shield machine、Quick topping machine、Small diameter shield machine, etc. Overcome many extremely complex underground pipeline network construction problems，Provide all-round intelligent technology and equipment for pipeline network construction for major projects in the world。