Language [ EN ]

Pioneering Underground Technologies









EPB Shield


Core products

Tunnelling & Pipelines

Recommend Page


EPB Shield

CORE PRODUCTS Tunnelling & Pipelines EPB Shield Mixshield Single Shield TBM

EPB Shield Fast tunnelling technology with a broad application range

Double Shield TBM Gripper TBM Partial-face Excavation Machine AVN Machine Auger Boring Machines HDD Rig Direct Pipe Vertical Shaft Sinking Machine (VSM) Mining

________________ For soft, cohesive soils tunnel boring machines with earth pressure support are a preferred option. So called Earth Pressure Balance Shields (EPB) turn the excavated material into a soil paste that is used as pliable, plastic support medium. This makes it possible to balance the pressure conditions at the tunnel face, avoids uncontrolled inflow of soil into the machine and creates the conditions for rapid tunnelling with minimum settlement.

The screw conveyor for the discharge of the excavated material is the process feature of EPB Shields.



Your contact person Olivier Kraft Head of Project Management | Traffic Tunnelling Phone +49 7824 302-3160 Kraft.Olivier(at)

Stability through face support pressure The special feature of Earth Pressure Balance Shields is that they use the excavated soil directly as support medium. This method is the first choice in cohesive soils with high clay and silt contents and low water permeability. A rotating cutting wheel equipped with tools is pressed onto the tunnel face and excavates the material. The soil enters the excavation chamber through openings, where it mixes with the soil paste already there. Mixing arms on the cutting wheel and bulkhead mix the paste until it has the required texture. The bulkhead transfers the pressure of the thrust cylinders to the pliable soil paste. When the pressure of the soil paste in the excavation chamber equals the pressure of the surrounding soil and groundwater, the necessary balance has been achieved.



Robert Kolotilo Product Manager Segmental Lining | Utility Tunnelling Phone +49 7824 302-7870 Kolotilo.Robert(at) Michael Groß Product Manager Pipe Jacking | Utility Tunnelling Phone +49 7824 302-4340 Gross.Michael(at) Your Selected Files


EPB Shield EPP1400TB - EPB2600TB data sheet EPP1500AE - EPB2500AE data sheet EPP2300AH - EPB4000AH data

Illustration of a typical segmental lining machine (diameter 6 m)


Screw conveyor speed and TBM advance rate regulate the pressure conditions A screw conveyor transports the excavated material from the base of the excavation chamber onto a belt conveyor. The interaction between the screw conveyor’s throughput and the TBM’s advance rate ensure that the support pressure of the soil paste can be controlled precisely. The balance in the excavation chamber is continuously monitored using earth pressure sensors. In this way, the TBM operator is able to TBM advance rate and screw conveyor speed regulate the fine-tune all tunnelling parameters to support pressure at the tunnel face. each other even under changing geological conditions, allowing for high advance rates and minimizing the risk of heave or settlement at the surface. GEOLOGY & DIAMETERS



Wider application range through perfect soil conditioning Not all ground conditions have ideal characteristics for EPB tunnelling in their natural state. However, the application range of this method can be enhanced tremendously by soil conditioning. This means changing the plasticity, texture and water permeability of the soil by injecting various conditioning materials such as water, bentonite or foam. This allows EPB Shields to achieve good advance rates even in heterogeneous soils containing gravel, sand or water, or in unstable geological conditions.

New developments for large dimensions Herrenknecht developed a new cutting wheel concept to master excavation diameters of more than 10 meters in highly abrasive ground. These are EPB Shields with two cutting wheels mounted on the same operating plane, which can rotate independently of each other in both directions. The high torque can thus be introduced into the soil gradually, beginning with the center cutting wheel as it “rushes ahead”. Together with soil conditioning, this reduces wear and tear of the excavation

EPB Machine with outer cutting wheel and center cutting wheel for excavation diameters of more than 10 meters in highly abrasive ground.

tools. Two large screw conveyors in the lower shield section move the large quantity of excavated material from the outer sections of the cutting wheel backwards. A smaller screw conveyor in the center removes the excavated material from the inner cutting wheel.

Technological innovations for special requirements The special advantage of Earth Pressure Balance Shields is their extreme flexibility. A range of developments at Herrenknecht have greatly enhanced the application range of this method. With conventional screw conveyors, it is not possible to build up a sufficient soil plug to maintain the support pressure in cohesive soils with increased water pressure. Such soils can, however, be controlled safely using muck pumps. The piston pumps completely seal the system behind the screw. This allows the screw, thus maintaining the pressure level at the tunnel face. The compressed, excavated material is pumped to other conveying systems downstream. In incohesive soils with high groundwater content, the slurryfier box developed by Herrenknecht can be installed subsequently. This special innovation connects the exit port of the screw conveyor with the slurry circuit. The excavated material is then transported hydraulically and the EPB Shield can continue to work in slurry mode. The concept of Herrenknecht EPB Shields successfully earth pressure support makes EPB technology accomplished breakthrough in more than 500 an all-rounder for soft, cohesive soils of all kinds. projects worldwide. In addition, the geological scope of application can be enhanced using soil conditioning and the technological innovations from Herrenknecht. This applies to both small excavation diameters in pipe jacking and large and even very large diameters with segmental lining.

Related content

Learn more about additional products and projects from the world of Herrenknecht

Herrenknecht AG


Water / Sewage / Electricity

Sochi Road and Railway Tunnels

Multi-service vehicles

New, efficient supply and disposal

The infrastructure planers in the

infrastructures in more than 80... More

Russian city Sochi on the Black Sea work... More

Trackless tunnel vehicles for flexible jobsite logistics. More



RSS Feed

We are participating:

EPB Shield - Herrenknecht AG.pdf

Page 3 of 3. PHARMA COURSES CUTOFF RANK OF CET-2016 - R2 Extended ALLOTMENT ( General ) 26-07-2016. 28. 29. 30. 31. 32. 33. 34. 35. 37. 38. 39. 40. 41. 42. B028 Luqman College of Pharmacy Gulbarga. B029 M.M.U College of Pharmacy Ramanagara. B030 M.S. Ramaiah Univerisity of Applied Sciences ...

285KB Sizes 2 Downloads 317 Views

Recommend Documents

The contribution of ecological footprinting to planning policy development 229. Page 3 of 22. EPB REAP.pdf. EPB REAP.pdf. Open. Extract. Open with. Sign In.

Me Shield Small.pdf
Voici mon talent. Voici ce que j'aime faire. Voici mon ami(e). Dans ma communauté j'aime. Page 1 of 1. Me Shield Small.pdf. Me Shield Small.pdf. Open. Extract.

used to connect or disconnect the input power supply to the board. Page 3 of 8 ... allows the user to interface all the Elint Labz plugs (sensors and actuators).

Base Shield v2.sch - GitHub
Page 1. 2015/3/23 11:34:14 E:\Eagles\Base Shield v2\Base Shield v2.sch (Sheet: 1/1)

Page 1 of 1. 10-Oct-2014 2:24:32 PM f=0.98 D:\Cytron Internal\Project\Shield-GPS53(Cytron SKM53 GPS Shield)\PCB and Schematic\Project\Shield-SKM53.sch (Sheet: 1/1). Page 1 of 1. Shield-GPS53_Schematic.pdf. Shield-GPS53_Schematic.pdf. Open. Extract. O

Shield Bot v1.2.sch - GitHub
Mar 3, 2015 - EN. 3. GND. 4. LX 5. VDD 6. FSEL 7. SS 8. COM1. COM2. CH1A ... GND. 4. FB 5. NC 6. EN. 7. NC 8. 1. 2. 3. A. B. C. D. 1. 2. 3. 4. 5. 6. A. B. C. D.

LCDKeypad Shield Schematic.pdf
Page 1 of 1. LCDKeypad Shield Schematic.pdf. LCDKeypad Shield Schematic.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying LCDKeypad Shield ...

Music Shield v2.2.sch - GitHub
2014/12/2 11:45:00 C:\Users\seeed\Desktop\Music Shield v2.2_20141128\Music Shield v2.2_20141128\Music Shield v2.2\Music Shield v2.

Page 1 of 1. 1/6/2016 10:28 AM D:\PCB\Projects\SHIELD-ESP-WIFI\SHIELD-ESP-WIFI.sch (Sheet: 1/1). Page 1 of 1. SHIELD-ESP-WIFI_schematic.pdf.

There was a problem previewing this document. Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item. ET SHIELD ...

SD Card Shield v1.1.sch - GitHub
Page 1. 2014-08-04 12:41:15 f=0.60 E:\BaiduYun\. \ArduinoShields\SD Card Shield\sch\v1.1\SD Card Shield v1.1.sch (Sheet: 1/1)

SeeedStudio Arduino Music Player Shield - datasheet-int109b2p.pdf ...
There was a problem previewing this document. Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item. SeeedStudio ...

Shield of Faith - Bulgarian Eastern Orthodox Diocese
Jul 14, 2013 - near Moscow in 1937, after a short arrest and a firm confession of their faith. All of them had the courage to face their physical death and preferred it to the denial of Christ, only because, before these tribulations, they were alrea

There was a problem previewing this document. Retrying... Download. Connect more apps... Try one of the apps below to open or edit this item.

RS232 Shield v1.sch - GitHub
R. IN. 2. 8. R. O. U. T. 2. 9. D. IN. 2. 1. 0. D. IN. 1. 11. R. O. U. T. 1. 1. 2. R. IN. 1. 1. 3. D. O. U. T. 1. 1. 4. G. N. D. 1. 5. V. C. C. 1. 6. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.

Shield of Faith - Bulgarian Eastern Orthodox Diocese
Jul 14, 2013 - passions will deliver us from our passion and will give us more grace. He will increase in us the love with which to serve Him and to express love towards our neighbor. In this way we become witnesses of the new life which Lord Jesus C

Nvidia shield manual pdf
Page 3 of 28. Nvidia shield manual pdf. Nvidia shield manual pdf. Open. Extract. Open with. Sign In. Main menu. Displaying Nvidia shield manual pdf.

marvel agents shield s02e03.pdf
marvel agents shield s02e03.pdf. marvel agents shield s02e03.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying marvel agents shield s02e03.pdf.

Efficiency Shield RWA 2016.pdf
Sign in. Page. 1. /. 2. Loading… Page 1 of 2. Page 1 of 2. Page 2 of 2. Page 2 of 2. Efficiency Shield RWA 2016.pdf. Efficiency Shield RWA 2016.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying Efficiency Shield RWA 2016.pdf. Page 1 of

Page 1. Whoops! There was a problem loading more pages. Retrying... nvidia-shield-tablet-k1.pdf. nvidia-shield-tablet-k1.pdf. Open. Extract. Open with. Sign In.

adafruit-data-logger-shield-rnqpor.pdf. adafruit-data-logger-shield-rnqpor.pdf. Open. Extract. Open with. Sign In. Main menu. Displaying ...

W5500 Ethernet Shield v1.0.sch - GitHub
4. SCLK. 5. VSS. 6. DO. 7. DATA1. 8. CDN. 9. G. 4. G. 4. G. 3. G. 3. G. 1. G. 1. G. 2. G. 2. 1. 2. 3. 4. 1. 2. 3. 4. G. N. D. 1. IN. 3. OUT. 2*2. A. 9. O. E. 1. 0. Y. 8. V. C. C.

Desert Shield and Desert Storm.pdf
... apps below to open or edit this item. Desert Shield and Desert Storm.pdf. Desert Shield and Desert Storm.pdf. Open. Extract. Open with. Sign In. Main menu.