Crusher

Over the past 30 years, we have successfully established production experience of various types of cone crushers, mills, sand making machines and other equipment, which will help you solve various problems.!

View all Services

What's in a Name? Mixshield, Crossover, Hybrid and More ...

Based on the ground situation (whether it's self-supporting ground, self-supporting ground with water pressure, or unstable ground), the Crossover is optimized towards "open" mode (as in hard rock shielded TBMs) or "closed" mode (as in compressed air, slurry, and EPB TBMs). Reliable geological information is therefore critical to the ...

Development of compound EPB shield model test system for ...

We independently developed a geological model test for shield tunnels, including a steel frame box for visualization, a compound testing apparatus for an EPB shield machine, a 3D printing system to create a model of cave, a hydraulic loading system, and a multivariable data monitoring system, as shown in Fig. 1.The system featured multiple functions, intelligent operation capabilities, and a ...

Norris Cut Project: Tunneling at Florida's Coast - tunnel

Available in slurry mode as well as in EPB mode depending on the requirements, the HCS offered the necessary adaptability to changeable ground conditions. Additionally, the front area of the machine had to be accessible at all times during the excavation to allow for tool changes, for instance.

Cutting wheel structure selection of EPB TBM and its ...

In order to study the stratum adaptability of earth pressure balance (EPB) shield machine tunneling in such types of soft ground, model tests of tunneling excavation, using the running tunnel of ...

Estimation of the cutterhead torque for earth pressure ...

Fig. 4 shows the schematic of the modified cutterhead in mixed-face ground. In Fig. 4, the mixed-face ground is assumed to include the general soft ground formation and the hard rock formation simultaneously, and the interface between the soft ground and the hard rock is simply assumed as a straight line.Under the mixed-face conditions, the EPB TBM cutterhead is equipped with hard rock cutters ...

What's in a Name? Mixshield, Crossover, Hybrid and More ...

The most common types is a multi-mode between EPB with a screw conveyor (for operation in "closed mode" or "semi-closed mode") and conversion to Rock Mode with the installation of a belt conveyor (for use in "open mode" operation). ... slurry, and EPB TBMs). Reliable geological information is therefore critical to the TBM design. An ...

Robbins Hybrid EPB TBM for Kavacik-Beykoz Wastewater ...

Once boring is complete a second concrete lining will be added, making the 2.2 m finished diameter of the tunnels. The Robbins hybrid machine can switch from a standard hard rock mode to a non-slurry EPB mode in soft ground As of August 2007, the machine had bored 1.1 km of the 4.1 km-long Beykoz tunnel, scheduled for completion in December 2007.

Multiobjective Optimization Design for Structural ...

As a key component of tunnel boring machines (TBMs), the disc cutter ring and its structural parameters are closely related to the TBM tunneling quality. Literature review shows that investigations on optimization design methods for cutter ring structure are seriously insufficient. Therefore, in this paper, a multiobjective optimization design model of structural parameters for disc cutter ...

Type selection of the head aperture ratio of EPB shield ...

The head aperture ratio of EPB shield cutterheads is an important index when the type of shield is determined. The influence of head aperture ratio on mucking rate is analyzed, and a method is ...

Robbins EPB caps 62 km of Tunneling with Final ...

Jun 19, 2019· Image 1: On May 23, 2019, a Robbins 8.93 m (29.3 ft) diameter EPB completed the final lot of Mexico City's Tύnel Emisor Oriente (TEO). Capping 62.1 km (38.6 mi) of tunneling. Image 2: The Robbins crew celebrates the breakthrough of the Robbins EPB at Lot 4 of TEO, after boring 10.2 km in some of the most difficult geology in Mexico.

Research on the Structural Rigidity Characteristics of a ...

Dec 12, 2019· To improve the adaptability of TBMs in diverse geological environments, this paper proposes a reconfigurable Type-V thrust mechanism (V-TM) with rearrangeable working states, in which structural stiffness can be automatically altered during operation. Therefore, millions of configurations can be obtained, and thousands of instances of working status per configuration can be set respectively.

- What is facesupport?

The normal operational tolerance adopted for an EPB shield is 0.3 bars. 8. Operating Modes While the TBM is in excavation mode the working chamber is filled with the support medium. To facilitate the entry of personnel, as well as expose the tunnel face and the top of the cutter head, the level of support medium can be reduced.

Crossover XRE navigates fault zones in Turkey

The Crossover machine began boring at a slight angle to the rest of the tunnel and in a fault zone, bypassing the stuck machine before gradually meeting up with the original tunnel alignment. The machine was required to be used in EPB mode as it encountered water pressures up to 23 bars, alluvium, flowing materials, and clay.

Geological Type Recognition by Machine Learning on In-Situ ...

At present, many large-scale engineering equipment can obtain massive in-situ data at runtime. In-depth data mining is conducive to the real-time understanding of equipment operation status or recognition of service environment. This paper proposes a geological type recognition system by the analysis of in-situ data recorded during TBM tunneling to address geological information acquisition ...

Dual Mode, "Crossover" Type Tunnel Boring Machines: A ...

using just one machine type. Today, Dual Mode, "Crossover" type machines are edging TBMs into new territory by employing design elements from both EPB and Hard Rock Single Shield Machines. Where multiple machine types might have once been used, a Crossover Rock/EPB machine can excavate an entire tunnel in vastly different conditions.

Crossover XRE TBM | The Robbins Company

Tunnel Boring Machines The Crossover XRE TBM is the Ideal Solution for Sections of Rock and Mixed Ground. Standing for a Crossover (X) between Rock (R) and EPB (E), the XRE has been designed and deployed by Robbins on multiple projects that feature sections of both hard rock and soft ground in the tunnel alignment.

(PDF) Comparative Study on Suitability of EPB Machine in ...

Huang et al. (2013) compared adaptability of EPB shield and SPB shield in Shenyang Metro. Pu et al. (2013) proposed optimized design of EPB shields on basis of lessons learnt in

Crossover Series Dual-Mode Machines - AFTES

Oct 16, 2015· General: 8.0m diameter Crossover (XRE) TBM capable of conversion from EPB mode to non-pressurized single shield mode Back-loading Cutterhead designed for: • Use with knife bits & scrapers (EPB mode - mixing chamber) • 17" disc cutters & bucket lips (open mode - radial loading plates & extendable hopper and screw) EPB Mode Bi-directional Rock Mode Mixed Ground Mode

CROSSOVER TBMs - Norsk Forening for Fjellsprengningsteknikk

INTRODUCTION • Most Tunnels do not have consistent and homogeneous geological conditions. • Multiple fault zones are always present in tunnels. • Broken Ground, Mix of Rock & Soil, High pressure ground water. • The industry has always looked for versatile tools to cope with such variations. • Time and Cost considerations. • This presentation is a quick overview of TBM

TBM tunneling in mixed-face ground: Problems and solutions ...

Therefore, under mixed-face conditions, the cutter fails in several modes (see Fig. 2), and cutter consumption can be much higher than expected.Liu reported that the number of cutters reached as high as 251 during the 348 m-long EPB tunneling of Guangzhou metro, averaging 1.4 m per cutter. High abnormal cutter consumption leads to frequent cutter replacement work; even worse, cutter ...

Determination of the cutterhead torque for EPB shield ...

Determination of the cutterhead torque for EPB shield tunneling machine Article in Automation in Construction 20(8):1087-1095 · December 2011 with 292 Reads How we measure 'reads'

Abstract: Cutter head is the key component of shield machine, in order to ensure the smooth running of dual-mode shield machine used for colliery inclined shaft engineer, it is necessary to study the strength and stiffness of cutter head.The loading calculation methods and equations were obtained by analyzing the mechanical characteristics of dual-mode shield cutter head in multiple conditions ...

Crossover Archives | The Robbins Company

Due to the geology, the Gerede machine required a convertible cutterhead optimized for hard rock. The cutterhead was designed for ease of conversion between hard rock and EPB modes, and cutter housings can be fitted with either disc cutters or tungsten carbide tooling. In addition, the cutterhead is designed to operate in a single direction.

Settlements induced by EPB heading - With a special review ...

The machine on Figure 2-2 is an EPB hard rock cutter head because it is fitted with cutters and with discs so that the machine can drive through soft ground and through rock as mentioned before. Figure 2-3 shows an EPB machine with a huge diameter of 15.2 m and with an in two parts divided cutter head for application of several torques on the ...

Interfacial Behavior in Tunnel Engineering

of this type of TBM main depends on the adaptability, efficiency and boreability of its cutting head. The interactive force between disc cutters and rock formation are the key parameter affecting adaptability, efficiency and boreability of a cutting head. Unfortunately, …

Surface subsidence characteristics of fully overlapping ...

This study investigates the characteristics of vertical soil deformation induced by fully overlapping tunnels constructed using a tunnel boring machin…

Robbins EPB Caps 62 km of Tunneling with Final ...

Robbins EPB Caps 62 km of Tunneling with Final Breakthrough at Emisor Oriente Jul 08, 2019 In May, a celebration was in order: The last of six 8.93 m (29.3 ft) diameter EPBs had completed excavation at Lot 4 of Mexico City's Tύnel Emisor Oriente (TEO), a feat marking the completion of ten years and 62.1 km (38.6 mi) of tunneling.

Modeling and analysis of thrust force for EPB shield ...

Modeling and analysis of thrust force for EPB shield tunneling machine Article in Automation in Construction 27:138–146 · November 2012 with 180 Reads How we measure 'reads'

Contact Us

GCM Industrial Technology Group Co., Ltd. sincerely welcomes you to contact us through hotline and other instant communication methods, whether it is project consultation or feedback.

  • Address:

    No.416 Jianye Road, South Jinqiao Area,Pudong New Area, Shanghai, China.

  • Phone No:

    +86-21-58386189, 58386176

  • Email Address:

    [email protected]