In 12 days, 1046 meters, the smallest diameter fast topping machine made in China Railway Construction Heavy Industry set a new world record!

Domestic minimum diameter quick topping machine

October twenty eighth，Good News from Thailand Natural Gas Pipeline Project Rapid Topping Machine Project，Domestic minimum diameter independently developed by China Railway Construction Heavy Industry（φ0.914 meters）Quick topping machine，Within 12 days, 1046 meters of super-long tunneling construction was completed.，After passing through the pile foundations of five high-voltage electric towers，The sixth section of the project is precisely connected.，Refreshed the single jacking distance of the same level of pipe diameter、Jacking speed and many other world records。

Project site

It is understood that，Thailand Natural Gas Pipeline Phase I Project is located in the south of Bangkok, Thailand.，Pipe diameter only 0.914 meters，The length of the sixth section of this construction is 1046 meters.，Divided into 12 pipe sections，Each pipe section is about 90 meters.，It has a steep slopeVType vertical curve andSType a horizontal curve，Penetration angle 4 °，The excavation angle is 6 degrees，The whole line must pass through the hyperbola in the middle of the pile foundation of the high-voltage power line tower.，A total of 5 pylons need to be crossed，The distance between the pile foundations of the electric wire tower is only 3 meters.，The construction is extremely difficult.。

For very small diameters、Very long distance、Curve tunneling and other complex working conditions，China Railway Construction Heavy Industry Co., Ltd. has successfully conquered the high-precision guidance correction、High-density design of ultra-small diameter equipment、Extra long distance power supply、Heat dissipation、Slag tapping、Promotion and many other core technologies，The smooth implementation of the project provides a solid guarantee.。

Since the first interval excavation at the beginning of this year,，The equipment is always in an efficient and stable state of operation。The single equipment has successfully completed the installation of 6 sections.、Tunneling, dismantling and transfer work，The total excavation distance is about 5226 meters.。In particular the sixth interval，The maximum driving speed of the equipment is stabilized at 0..65 meters，It took only 12 days to complete the roofing work of 1046 meters of pipeline.，Successful precise crossing between five electric tower pile foundations along the way，The construction accuracy is generally controlled within 10 cm.。

Excellent performance of rapid topping machine of China Railway Construction Heavy Industry，Has been recognized by customers and owners.，Railway Construction Heavy Industry will continue to focus on intelligent equipment manufacturing，Committed to providing better quality for customers around the world、More efficient、More reliable equipment and services。

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