Brosur Multi Block Retaining Wall System

Retaining Walls Constructing retaining walls in reinforced soil - UK

2

Tensar. The value engineered solution In Tensar you’ll find a partner with the experience and flexibility to respond to your project requirements. From design to completion, we’ll make sure you always benefit from a practical, cost-effective solution to your specific need. Bridge abutments.

The complete reinforced soil wall system Tensar Wall Systems comprise a soil mass, reinforced with Tensar RE uniaxial geogrids and finished with facing units selected by the designer to meet the client’s requirements. Designers have a wide choice of facing options at their disposal to meet the aesthetic and economic needs of the project. Typical wall system with cut-in view (UK).

The cost effectiveness and versatility of Tensar reinforced soil offers clients, specifiers and contractors many advantages over other methods, such as reinforced concrete, for the construction of retaining walls and bridge abutments:

Independent assessment and approval The main components of the Tensar Wall System have been subjected to independent assessment recognised throughout the world and have received unrivalled approval from the most respected bodies in the industry. More comprehensive information can be found in the Performance and Properties of Tensar Uniaxial Geogrids literature.

• Rapid and economical construction • Attractive range of styles and finishes • Durable and maintenance free

Load bearing bridge abutment using modular block wall facing (Australia).

• Often no specialist construction skills necessary

TENSAR RE GEOGRIDS FOR REINFORCED SOIL RETAINING WALL AND BRIDGE ABUTMENT SYSTEMS

TENSAR TWI WALL SYSTEM FOR REINFORCED SOIL RETAINING WALLS AND BRIDGE ABUTMENTS

• Tolerance of differential settlement • Possible use of low cost, site-won fill • Low bearing pressure can avoid expensive ground treatment

Z-20.1-102

Allgemeine bauaufsichtliche Zulassung Z-20.1-102 of the Deutsche Institut für Bautechnik (DIBt), Berlin for reinforced soil with the Tensar geogrids SR55, SR80, SR110.

• High resistance to earthquake loading

Tensar International Support Services

Winwall in-house software is used to generate construction drawings.

Tensar International’s engineers are available to provide clients, consultants and contractors with design and construction support. Designs are carried out using sophisticated software developed in-house:

• Geogrid layout is designed using the program Winwall, which includes a number of well established design methods • Overall stability can be checked using the program Winslope • Earthquake forces, complex geometry and water tables may all be taken into account

Winslope in-house software is used to generate Free Application Solutions.

Construction drawings may be provided.

The services offered range from a free of charge application suggestion to a full design and supply service with professional indemnity cover. No liability in negligence or responsibility of any kind is accepted by Tensar International for any project where Tensar products are not used.

Modular Concrete Block Facing Units Factory-made, precast concrete blocks are available which have been developed to produce an attractive, easily constructed face. The high efficiency connection between the facing unit and the Tensar geogrid is a feature of this system.

Docks, slipways and waterways.

Facing up with brickwork is an option.

The blocks are manufactured from high quality concrete in a range of colours, styles and finishes. In addition some of the systems allow a façade of masonry or brickwork to be simply connected to the structure using stainless steel ties for architectural effect. This gives the designer numerous options from which to choose the final appearance of the structure. The horizontal alignment may be straight or curved, and constructed with vertical, battered or terraced faces.

Double spandrel bridge.

Pedestrian walkway.

The use of these facing units offers the additional advantage of not requiring specialist lifting equipment, as they are easily handled, and there is no need for propping of the structure during construction.

Tensar Walls maybe constructed in attractive terraces.

Placement of the facing units, geogrid and the fill material are all part of the same construction process. As a result, progress is fast without the need for specialist plant or highly skilled labour.

Bridge abutments.

A selection of other facing options The selection of a facing type will depend upon the end use of the structure and its expected design life. Most major structures including those supporting highways or bridges have a design life exceeding 100 years. In this situation, the facing needs to be as durable as the Tensar geogrid soil reinforcement. However, the facing need not be unattractively standardised or plain.

Limestone block wall (Australia).

Concrete Panels Full-height panel wall (Netherlands).

Precast concrete facing panels - either full height or incremental - may be manufactured by casting in short starter lengths of the appropriate Tensar geogrid at the rear. Once placed or propped in position, the main geogrid length is simply attached to the starter length by forming a full-strength connection. The panel mould may be designed to accommodate a number of attractive face styles.

Dewsbury wall construction.

The Dewsbury System The full-strength geogrid connection.

This method of construction uses simple components - precast concrete planks and steel stanchions. This low-cost, functional-looking structure may then be faced up with brickwork or masonry to meet the aesthetic needs of the structure.

Marine wall construction.

Marine Units Incremental panel wall (UK).

These substantial precast concrete units are well suited to aggressive marine conditions. The geometry of the face units means no propping is required during construction.

Rock boulder facing

Harbour wall with masonry pattern finish to the Marine units (UK).

Tensar reinforced soil wing walls (UK).

Steel Mesh Panel (SMP) faces

Temporary support structure with a steel mesh face.

Wrap-around faces

This method of construction utilising steel mesh panels and Tensar Geogrids provides a low-cost method of construction. When built as a vertical structure, this system is often used for contractors temporary works.

Tensar geogrid itself may be used to form the face of the structure. The wrap-around face is frequently used for vertical structures where aesthetics are not the immediate concern, also in temporary works situations. These types of face may be formed using a temporary external formwork or an internal bagwork. More comprehensive information on soft-faced structures, including vegetated types and faces up to 90˚, can be found in the Steep Slopes literature.

Temporary wraparound face during construction of a reservoir.

Tensar RE geogrid specifications Tensar geogrid - typical characteristics and dimensions Property

Units Polymer

40RE

55RE

80RE

120RE

160RE

HDPE

HDPE

HDPE

HDPE

HDPE

Minimum carbon black (1)

%

2

2

2

2

2

Roll width

m

1.0 & 1.3

1.0 & 1.3

1.0 & 1.3

1.0 & 1.3

1.0 & 1.3

Roll length

m

50

50

50

50

30

Unit weight

kg/m2

0.34

0.42

0.60

0.94

1.26

Roll weight

kg

19 & 24

23 & 29

32 & 41

49 & 63

40 & 51

Dimensions AL

mm

235

235

235

235

230

AT

mm

16

16

16

16

16

BWT

mm

16

16

16

16

16

FWL

mm

6

6

6

6

6

tB

mm

1.8 - 2.0

2.5 - 2.7

3.4 - 3.7

5.5 - 5.9

7.1 - 7.7

tF

mm

0.7

0.9

1.3

2.0

2.6

tULT (2)

kN/m

52.5

64.5

88.0

136.0

173.0

Load at 2% strain (2)

kN/m

12.7

16.1

23.7

38.0

52.5

Load at 5% strain (2)

kN/m

24.7

30.9

45.2

75.5

103.0

Approx strain at tULT

%

11.5

11.5

11.5

11.5

11.5

%

100

100

100

100

100

PC or TCR for 10ºC (5)

kN/m

23.3

28.7

38.2

54.6

69.4

PC or TCR for 20ºC (5)

kN/m

20.7

25.5

34.0

48.7

61.7

Quality control strength

Junction strength (3) Long term creep rupture strength ULS (4)

(1) Carbon black inhibits attack by UV light. Determined in accordance with BS 2782:Part 4:Method 452B:1993. Any section of grid fully exposed to sunlight can be expected to retain 90% of its quality control strength for periods in excess of 40 years in temperature climates and 20 years in tropical climates. (2) Determined in accordance with BS EN ISO 10319:1996 and as lower 95% confidence limit in accordance with ISO 2602:1980 (BS 2846:Part 2:1981). (3) Determined in accordance with GRI Test Method GG2-87, and expressed as a % of the quality control strength. (4) Determined as a lower bound using standard extrapolation techniques to creep rupture data obtained following the test procedure in BS EN ISO 13431:1999 for 120 year design life. (5) In-soil temperature. (6) Tensar RE geogrids are inert to all chemicals naturally found in soils and have no solvents at ambient temperature. They are not susceptible to hydrolysis and are resistant to aqueous solutions of salts, acids and alkalis (pH 2.0 to 12.5) and are non-biodegradable. (7) All quoted dimensions and values are typical unless stated otherwise. Data sheets are also available for 60 year creep rupture strengths and Tensar SR geogrids.

Contact Tensar International or your local distributor to receive further literature covering Tensar products and applications. Also available on request are product specifications, installation guides and specification notes. The complete range of Tensar literature consists of: • Tensar Geosynthetics in Civil Engineering A guide to the products and their applications • Ground Stabilisation Reinforcing unbound layers in roads and trafficked areas • Steep Slopes Constructing embankments with steep slopes • Retaining Walls Constructing retaining walls in reinforced soil • Foundations over Piles Constructing over weak ground without settlement • Basal Reinforcement Constructing embankments over weak ground • Railways Reinforcing ballast under railway track • Asphalt Pavements Reinforcing asphalt layers in roads and trafficked areas • Erosion Controlling erosion on soil and rock slopes

Your local distributor is:

Tensar International Limited

Tel: +44 (0)1254 262431

New Wellington Street

Fax: +44 (0)1254 266868

Blackburn BB2 4PJ United Kingdom

E-mail: [email protected] www.tensar-international.com

Tensar geogrids are manufactured under tightly controlled conditions. The quality assurance procedures covering design and application and the manufacturing process have been certified by the British Standards Institution as a Registered Firm in accordance with BS EN ISO 9001:2000 Q05288

Tensar is a registered trade mark. ©Copyright Tensar International Limited Printed May 2004 Issue 3, 79010057 The information in this brochure is supplied by Tensar International free of charge. Tensar International do not assume any duty of care to you or any third party. No liability for negligence (other than for death and personal injury) can arise from any use of or reliance on the information in this brochure or use of any Tensar International product mentioned. Tensar International will not be liable if this brochure contains any misrepresentation or misstatement. Determination of the suitability for any project of the information and any Tensar International product mentioned in it must be made by your engineer or other professional advisor who has full knowledge of the project. You, together with any such engineer or advisor, must assume all risk of loss and damage of any kind arising from use of the information or any product of Tensar International other than the risk of death and personal injury. If you or any third party subsequently purchases a product referred to in this brochure or any other Tensar International product the entire terms of the contract of purchase and the entire obligation of Tensar International relating to the product or arising from its use shall be as set out in Tensar International's Standard Conditions in force at the time of purchase, a copy of which may be requested from Tensar International.