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Equip & Tech Review Sept

3/9/02

04:39 pm

Page 355

EQUIPMENT AND TECHNOLOGY REVIEW

Taisei – Spherical shield TBM technology

Spherical shield TBM technology is capable of continuously boring ver- tical and horizontal tunnels using a single machine. The spherical shield TBM can be rotated in any direction at any time during the tunnelling process, making possible a number of tunnel configurations.

Spherical shield TBM’s are claimed to offer numerous advan- tages over conventional TBM’s. Since the vertical tunnel (access shaft) constructed by the machine can be smaller than the size of shafts with conventional retaining walls, the method enables boring down from confined sites in crowded residential or commercial areas. Access shafts at turning points can be eliminated, construc- tion periods are reduced and environmental impact is greatly diminished.

The boring machine has a spher- ical unit that contains a smaller cutter-head. The larger shield machine tunnels either horizontally or vertically to the planned corner and the spherical unit rotates allow- ing the smaller machine to bore in the new direction.

The machine is sealed mechani- cally against water; it can bore a tunnel under the water table with- out affecting the groundwater scheme and without causing ground subsidence.

Spherical shield TBM technology received the Japan Society of Civil Engineering Award for 1994 and the Imperial Invention Award in 1997 in Japan and has been patented in the US and EU coun- tries (US Patent No. 5,634,692)

Further information contact: Tai- sei Construction Corporation, 6161 Katella Avenue, Suite 200, Cypress, CA 90630, USA, Tel: +1 (0) 714 886 1530, Fax: +1 (0) 714 886 1546.

One of Volvo’s new small excavators

vators are fitted with a load sensing hydraulic system. This system pro-

vides

power,

smoothness,

controllability and independence of all movements for improved effi- ciency, precision and comfort, and therefore increased productivity. The new excavators also have dra- matically improved soundproofing. The result is a considerable reduc- tion of the internal as well as the external sound levels, leading to less operator fatigue and more comfort while making the machine better suited for use in urban areas.

Attention has also been paid to safety. When lifting the console of an EC15B or EC20B, it locks all the machine controls, including the equipment, the blade, the transla- tion and the rotation of the turret. This prevents risks of accidents when climbing in or out of the cab. A new set of powerful halogen working lights gives perfect visibility when operating in the dark.

In order to maintain a high resale value, all equipment connectors are protected under thick plates and the newly designed wrap-around counterweight is protection for the rear. All hydraulic tubes are zinc- coated to prevent them from rusting.

. . . and appoints 9 dealers in China

RES No. 204

Volvo Construction equipment launches new compact excavators

The new 1.5 to 2 tonne Volvo B- series compact excavators combine a new state-of-the-art load sensing hydraulic system, reduced sound levels and enhanced security. The EC15B and EC20B compact exca-

Volvo Construction Equipment (CE) announces the appointment of 9 authorised dealers in China. Keith Ellis, President of Volvo CE Asia Markets, comments, “We are delighted to be associated with our new dealers in China. These com- panies are experienced in the sales and marketing of construction equipment in their respective terri- tories and their level of service reflects Volvo’s standard for cus-

Guangzhou Zhongnan Machinery & Equipment Co., Ltd.

Each of the dealers will sell and service Volvo’s complete range of construction equipment – wheel loaders, articulated haulers, excava- tors, motor graders and compact equipment – in their territory.

For further information contact: Beatrice Cardon, Volvo Construc- tion Equipment, Hunderenveld 10, B-I082 Brussels, Belgium, Tel: +32 24825021, Fax: + 32 2 675 177 , Email: beatrice.cardon@volvo.com

RES No. 205

tomer care. This is a vital step in the development of our presence in this important market”.

The 9 dealers are: Beijing Har- mony Resource Technology Co., Ltd, Qinghai Century Development Technology Co., Ltd, Beijing New Construction Machinery Equipment Co., Ltd, Liaoning Liao An Construc- tion Machinery Co., Xi’an Wonder Technology Co., Ltd, Wuhan Zhong- nan Construction Machinery and Equipment Co., Ltd, Hangzhou Liyang Construction Machinery Co., Ltd, Asia Sky Holding Ltd and

Rocscience geomechanics software

Rocscience Inc. is a geomechanics software development company that was successfully spun-off from the University of Toronto. Specialist f i e l d s i n c l u d e s l o p e s t a b i l i t y , t u n n e l 3-dimensional design, support

stress analysis and data visualisa- tion. Projects where Rocscience technology has been used include mines, underground power cav- erns, highway and subway tunnels,

Milling Cutters

ETH 30

100 kW, ideal Milling Cutter for tunnelling and trenching

ETH 50

150 kW, for heavy applications in hard rock and demolition

ETH 200

270 kW, high cutting power for mining and mass excavation

Eickhoff – Innovation since 1864

Bergbautechnik GmbH Hunscheidstraße 176 D-44789 Bochum, Germany

Tel.: Fax: e-mail:

+49 234. 975-0 +49 234. 975-2040 vt@eickhoff-bochum.de

Internet: www.eickhoff-bochum.de

RES No. 140

355

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