The advantages of

concrete vertical walls “MacRes System”

in urban areas

GEO-ENVIRONMENT AND CONSTRUCTION European Conference in Geo-Environment and Construction

Mr Giuseppe Lembo Eng.

Corporate Specialist Vertical Walls

MACCAFERRI

Mr Taulant Alilanj Msc Eng.

MACCAFERRI BALKANS

VERTICAL REINFORCED EARTH SYSTEM WITH FRONT FACE MADE IN CONCRETE PANELS….A FAST DESCRIPTION

The system consists of a soil reinforced with linear high adherence reinforcements placed in the soil in successive layers and

connected to a flexible facing made of concrete panels.

The principle of operation of the system is based on the interface friction between linear reinforcements and the structural filling

soil. That means that the most important factor for the design is the structural filling soil and in particular the friction angle

value.

Lengths, dispositions and number of the reinforcements are

designed according to the earth pressure of the backfill soil and of

the in situ soil and according to the eventual overloads that insist on

the reinforcements and on the back of the reinforced structure: the

reinforcements are determined basing on the tensile stresses

transmitted to the structural soil for effect of the interface friction.

To adapt to the specific characteristics of each project, the system

offers the option of using either steel reinforcements than polymers

with different strengths for greater efficiency.

All are, high adherence and their characteristics permit the construction of structures, including very high and still highly

charged.

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

REINFORCED EARTH SYSTEM ELEMENTS

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

FRONT FACE

LEVELLING PAD

HIGH ADHERENCE REINFORCEMENTS

REINFORCED SOIL

MASS

ADVANTAGES

• Worldwide known System

• Fast Installation

• Low cost compared to traditional

structures

• Minimum space required

• Panels with different architectural

finiture

• Not required previous experience

for installation

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

POSSIBLE APPLICATION

• Road and Highway

• Railways

• Airport

• Quarry

• Parking area

• Bridge Abutment

• Tiered Walls

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

GEOSYNTHETIC REINFORCEMENT - PARAWEB

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

ParaWeb strips are planar structure consisting of a core of high tenacity polyester yarn tendons

encased in a polyethylene sheath.

MAIN FEATURES:

• Nominal resistance from 30kN to 100kN

• The lenght of the rolls is of 100ml

• The tensile nominal strength is printed on

each roll

• No susceptibles to corrosion

• High durability

• Easy trasportaion, handling and installation

• High interaction with soil

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

The elongation at maximum load at failure for all grades of

Paraweb strap covered by BBA Certificate is 12% ± 1%.

But this is simply theory because in reality Paraweb

reinforcement works far from the nominal tensile strength.

Considering all the reduction factors (creep,

durability/environmental, extrapolation of data,

ramification of failure), the value assumed in calculation is

closer to 65% of the nominal tensile strength.

HOW CAN I CONSIDER PARAWEB AS INEXETENSIBLE REINFORCEMENT?

A reinforcement is inextensible when it sustains the

design loads at strains less than or equal to 1%.

JOBSITE EXPERIENCE

ARLUNO (MI) - ITALY

General details LOCATION: Arluno (MI) CLIENT: CAVTOMI ENGINEER: Officine Maccaferri PRODUCTS USED: MacRes 3400 mq BEST FEATURE: height max MacRes 8,91m PROBLEM DESCRIPTION: New overpass for bicycle with limitated width and current strain CREW (people): 3 foreman + 1 crane operator PRODUCTIVITY (mq/day): 40-50 mq/day

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

KEMPEN – BELGIUM

General details LOCATION: Kempen CLIENT: JAN DE NUL ENGINEER: Officine Maccaferri PRODUCTS USED: MacRes 10.000 mq BEST FEATURE: height max MacRes 14m PROBLEM DESCRIPTION: New highway using treated soil with lime CREW (people): 3 foreman + 1 crane operator PRODUCTIVITY (mq/day): 40-60 mq/day

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

JOBSITE EXPERIENCE

The advantages of

concrete walls “MacRes System” in urban areas GEO-ENVIRONMENT AND CONSTRUCTION

European Conference in Geo-Environment and Construction Mr Giuseppe Lembo - Mr Taulant Alilanj

Thank you for your kind attention