Excavate "Dragon Rise"! Railway Construction Heavy Industry Variable Diameter Inclined Shaft TBM realizes the world's first R50m ultra-small vertical turning tunneling.

October 08, 2023

Heard about the level、Shaft

Even inclined shaft excavation

But

Have you ever seen someone like“The dragon raises its head”The same

A Roadheader with a high elevation head?？

The artifact is coming

Quick view

Recently，At the construction site of the State Grid Xinyuan Hunan Pingjiang Pumped Storage Power Station，Variable diameter inclined shaft rock tunneling machine independently developed by China Railway Construction Heavy Industry Co., Ltd.(TBM)Successfully completed the world's firstR50mSuper small vertical turn，Also like“Cobra maneuver”Large angle of elevation heading tunneling，And enter 50°Excavation of inclined shaft section，It marks another major historic breakthrough in China's Roadheader technology.。

TBMVertical turning section formed by tunneling

It is reported that，The diversion inclined shaft of pumped storage power station is usually arranged in two stages.，The length of each inclined shaft is 500mLeft and right，Between the adit and the inclined shaft isR50mLeft and right sharp turn section transition。In the past development and application of Roadheader，The minimum vertical curve turning capability of a roadheader is typicallyR500 to 1000mBetween，Excavation demand of diversion inclined shaft of pumped storage power station with sharp and large slope change，R50mA vertical curve turn means that every 0..5mThe cutterhead head-up angle will reach a maximum of 1.2°，Previously, domestic and foreign counterparts said that the roadheader was difficult to achieve.。

China Railway Construction Heavy Industry Co., Ltd. has accumulated strong technical strength.，It has successively conquered the large slope excavation of coal mine roadheader.、Pumped storage power station drainage gallery TBM horizontal turning and other technical basis.，With the support of State Grid Xinyuan Hunan Pingjiang Pumped Storage Company，United Sinohydro Bureau 8、Zhongnan Survey and Design Institute of China Electric Power Construction、Guangdong Keyuan·Hunan Electric Power Consulting Consortium Jointly Concentrate on Independent Research and Development，Complete the vertical turning type successively and specificallyTBMShield body、Hydraulic propulsion system with variable zoning and stepless back pressure regulation、 Laser +Multi-sensor fusion roadheader guide measurement system、Adaptive Variable Head Fluid Medium Conveying Technology、Multi-stage slope-changing slag tapping technology、Development and application of more than ten key core technologies, such as rapid launching technology of non-turning guide platform。

50°Working condition of super large slope

It is understood that，The variable diameter inclined shaftTBMYesR50mTurning tunneling，With the joint efforts of all parties involved in the construction，It overcomes the complex transportation line with many bends and steep slopes in the tunnel.、60mThe hoisting space of the assembly cavern is narrow.、The assembly and commissioning period is only 40 days.、Complex process of split launching，And dig during tur、Slag tapping、Guide、There are many difficulties in material transportation.，It took only 19 days to complete the excavation of the turning section.，At the same time，Maximum daily footage up to 5m，The inclined shaft is greatly shortened.TBMFlat to inclined construction period，It creates favorable conditions for the rapid construction of the straight section of the diversion inclined shaft of the subsequent Pingjiang Pumped Storage Power Station.。