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  • Gripper TBM

    Boring Dia. 8.1 m,
    YinSong Water Divison

  • Metro EPB Tel Aviv

    Boring Dia. 7.54

  • EPB & Rectangular

News

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CREG ‘‘Golda’’ EPB TBM launched in Israel

On the morning of 20 February, a remarkable ceremony of TBM launching has been held in Tel Aviv district in Israel. More than 300 guests, including Israel Minister of transport and Chinese ambassador witnessed CREG’s success and shared the glorious moment.

Tel Aviv is the second biggest city in Israel, with a large population. To reduce traffic congestion, Israel government decided to construct seven light rail lines. Red line is one of the seven lines with a total length 23km and consisting of TBM section, traditional excavating section and 23 stations. CREG signed up a contract to supply 6 EPB TBMs for red line west machining section.

CREG ‘‘Golda’’ TBM is 105m long with diameter 7.53m. This machine has been manufactured according to the local construction standards to strictly satisfy high level QSHE requirements. TBM was launched at Galei Gil shaft and will be received at Ben Gurion station, thereinto passing through Aylon River, highway and five important landmarks. Tunnel was mainly built in soft ground condition. The revealed geology are clay and sand. The main concern is boring beneath riverbed. The overburden is less than 4m, in addition two concrete piles foundation with one meter diameter penetrated through the riverbed will be an obstacle while tunneling. So how to limit the settlement and crush concrete piles will be the crucial challenges.

The TBM main characters are as follows:

  • Boring diameter: 7530 mm
  • Total length: 105 m
  • Total weight: 780 ton
  • Total drive power: 1600 kw
  • Total installed power: 2673 kw
  • Max. advance speed: 80 mm/min
  • Thrust force: 55750 kN
  • Breakout torque: 14000 kN∙m
  • Rotation speed: 0-3 rpm
  • Max. working pressure: 5 bar
  • Min. horizontal radius: 200 m
  • Max. climbing slope: 5%
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CREG R297 slurry TBM site assembly completed

February 8th 2017, CREG R297 slurry TBM has been successfully assembled on jobsite in Wangjing district, which is located in Chinese capital Beijing, site commissioning will be taken place later on.

Early 2016, CREG has signed a contract with China Railway Tunnel Group (CRTG) to supply two slurry machines numbered R297 and R298 for railway lot13 from Beijing to Shengyang, which is considered the crucial section of this alignment. The tunnel is built mainly in alluvium deposits, the geotechnical investigation shows that clay, silt and silty clay will be accoutered during TBM excavation.

Challenges:

  • Shallow overburden: Near the launching area, the ground cover is only 10,5m, how to prevent the potential collapse will be a major issue for TBM launching.
  • Cross important landmark: Tunnel will pass through beneath capital airport, highway and intensive residential buildings etc. Differential settlement must be limited during tunnelling.
  • 3680m without shaft: TBM must continuously function without any fatal mistake.

Highlights:

  • Anti-wearing treatment for special place of cutter head.
  • Zero spillage pipe extension system
  • Full coverage flushing system

The TBM main characters are as follows:

  • Total length: 82 m
  • Boring diameter: 10,90 m
  • Motorization: Electrical drive
  • Total drive power: 2000 kW
  • Max. advance speed: 50mm/min

R298 is now assembling in main factory of CREG headquarters, the factory acceptance will be held in 1st march.

We expect an outstanding performance of CREG slurry machine.

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CREG R73 hard rock TBM is ready to go in Vietnam

February 6th 2017, CREG R73 hard rock TBM has been successfully launched in Vietnam Da Nhim jobsite. CREG as a TBM manufacturer pioneer, vigorously promoted the development of infrastructure construction in this country.

In November 2015, CREG was committed to renovate and refurbish a used Wirth hard rock TBM for Vietnam hydroelectric power station project running by CC47 Company. After elaborate studying, modification and testing, CREG professional team has achieved their goal that the hard rock TBM’s performance met all the requirements according to the local geological condition. Factory acceptance was took place in Oct. 2016.

The TBM main characters are as follows:

  • TBM Length: approx. 170 m
  • TBM type: gripper TBM
  • Boring diameter: 3,90 m
  • Motorization: Electrical drive
  • Total installed power: 1440 kW
  • Max. advance speed: 6m/h
  • Max. torque: 1400 kN∙m
  • Rotation speed: 0 to 12,5 rpm

Kelly system is consisting of cutter head jacket, support ring, support cylinder, push cylinder, Kelly gripper and rear support.

Key features are as follows:

  • Gripper pads: 8 units
  • Gripper cylinder: 16 units
  • Total gripping force. 19968 kN
  • Thrust cylinder: 2 units
  • Max. thrust force: 8048 kN
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MENGHUA U-Shape TBM made its first 500m successfully

Segment by segment, meter by meter, time has witnessed the world pioneer’s success. On the occasion of Chinese New year, an exciting news from Baicheng Railway site office that Menghua U-sharp TBM has successfully completed the first 500 meters.

Baicheng Railway tunnel is located in Shanxi Prov. Total length of tunnel is 3345m with the maximum overburden 81,05m. Mini horizontal radius is 1000m and maxi slope is 0,5%. The jobsite is in Quaternary alluvium, tunnel will be mainly built in silty sand, fin sand and yellowish clay. After enormous amount of demonstration and analysis, the World’s first U-sharp EPB machine has been developed by CREG for the application of soft ground condition.

U-sharp EPB machine was launched in Nov. 2016, according to the feedback from jobsite, it has well performed in soft ground mining. After an adaptation period, new they achieved high productivity of five rings per shift. Excavation parameters were registered and transferred to database center for further analysis.

U-sharp TBM is about 110 meters long with a “horse hoof” section of 10.95m (width)*11.9m (height). Cutter head consists of two rows star sharp cutters with front and back arrangement. The total excavation coverage is more than 90%. Comparing with traditional TBM, U-sharp TBM can reduce 10% to 15% excavation area so that it efficiently increase the section utilization.

The main characters are as follows:

  • Length of shield: 11 m
  • Motorization: Electrical drive
  • Drive power: 1980 kw
  • Max. thrust: 13948 t
  • Max. advance speed: 60 mm/min
  • Max. torque: 2643 kN∙m (per group)
  • Min. turning curve: 800m
  • Max. slope: 3%
  • Segment type 7+1

CREG - Rectangular pipe jacking machine finishes tunnel in Singapore

At the beginning of November a rectangular pipe jacking machine with a cutting section of 7.72m x 5.65m has finished tunnelling as part of Singapore’s T221 project. The machine was deployed to an underpass at the MRT Thomson-East Coast Line's Havelock MRT station. The Land Transport Authority (LTA) decided to use a rectangular pipe jacking machine supplied by CREG, this was to minimize noise and dust during due to tunnel construction works. Also by using this type of machine it meant less time for traffic diversions, because this construction method significantly reduces the total construction time of a tunnel. The excavation of the 157m long tunnel took only six months which compared to cut and cover method was much faster. This exciting and outstanding mechanical tunnelling technology has been proven by a couple of projects in Asia, where CREG has supplied rectangular pipe jacking machines with different dimensions. Recently CREG was honoured with the Gold Award for “Chinese Good Design” for high technical innovation, which is organised by Red Dot and awarded by the China Academy of Engineers. The machine used in Singapore will be moved to the Thomson-East Coast Line's Stevens interchange station so it can excavate the next underpass that goes under the Bukit Timah canal. For further information please visit their website http://www.creg-germany.com/ or contact info@creg-germany.com . 51/16.

Tunnelbuilder welcomes CREG TBM Germany

CREG is the leading TBM supplier for challenging tunnelling work in underground projects worldwide. CREG provides TBMs, tunnelling technology and technical solutions for a wide variety of tunnelling projects. To date CREG have provided more than 400 different TBMs , they have produced high quality and innovative EPBs, slurry TBMs, single shields, Telescope shields and Gripper TBMs all have a range of boring diameters from 3 to 15 meters. In addition to the supply of TBMs, CREG can also supply rolling stock, disc cutters, battery and diesel locomotives as well as tunnelling formwork. CREG´s TBMs have been used to bore metro tunnels, water transfer tunnels, sewage tunnels, as well as railway and highway tunnels in China and overseas. All their customers highly recommend the use of their products on these projects. CREG TBM Germany is based in Erkelenz in the Cologne / Düsseldorf region and was founded in 2014 after CREG took over the long-standing and tradition-steeped tunnel boring machine technology and business of the TBM manufacturer Aker Wirth. For further information about the company and their products please visit their website http://www.creg-germany.com/ . Or you can email CREG with your requirements for tunnelling works on info@creg-germany.com, Mr. O. Hartge. 51/16.