leStrade n. 1955 marzo 2024

Novità
La fresatrice
MP 1000HD
L’asportazione controllata
del conglomerato cementizio
in galleria. MP 1000HD
Simex: una fresa speciale per
incrementare la produttività
delle manutenzioni in galleria
a cura di Edvige Viazzoli
L’Italia è uno dei Paesi che vanta il numero più
alto di gallerie stradali in Europa: oltre 4.400 su
tutto il territorio nazionale. Le gallerie sono infrastrutture
che necessitano di una costante manutenzione
per far fronte a problemi di varia natura
quali fessurazioni, infiltrazioni e, in generale,
ammaloramenti dei materiali costitutivi, che ne
determinano un progressivo indebolimento strutturale.
Gli agenti esterni, come acqua e anidride
carbonica, innescano processi di corrosione che
nel tempo possono creare seri problemi di fessurazione
del calcestruzzo armato, rendendo inevitabili
interventi di bonifica e ripristino. I progetti
di messa in sicurezza della rete delle gallerie
possono prevedere diversi livelli di intervento, a
seconda delle necessità riscontrate: dalla sistemazione
dei marciapiedi, all’adeguamento degli
impianti, fino al risanamento dei piedritti e della
calotta.
Ad oggi Simex offre attrezzature specifiche per
la rimozione e la scarifica del calcestruzzo, su
superfici verticali o inclinate, tramite la gamma
di fresatrici per profilatura MP, che si compone
di quattro diversi modelli, con tamburi fresanti
da 1000, 800, 600 e 500 millimetri. All’aumentare
delle richieste di intervento per manuten-
English Version
The MP 1000HD head cutter
THE CONTROLLED REMOVAL OF THE DAMAGED TUNNEL
LININGS. MP 1000HD: A SPECIAL CUTTER HEAD TO
INCREASE PERFORMANCE IN TUNNEL MAINTENANCE
Italy is one of the countries that boasts the highest number of road
tunnels in Europe: more than 4400 throughout the national territory.
Tunnels require constant maintenance to deal with problems of
various kinds such as cracks, infiltrations and, in general, deterioration
of the constituent materials. External agents, such as water
and carbon dioxide, trigger corrosion processes that can create serious
cracking problems in reinforced concrete over time, exposing
infrastructures to progressive structural weakening.
The MP cutter heads range is particularly effective in removing
damaged concrete. Scarification depth and uniformity are ensured
by lateral wheels, for profiling the tunnel from the crown and along
the side walls, down to the ground. MP range is divided into four
models for 500, 600, 800 and 1000 milling widths for excavator coupling.
Given the increase in requests from the tunnel maintenance
market, Simex has worked in recent months on a special model,
created for big prime movers with specific characteristics. We are
talking about the MP 1000HD, where the acronym HD stands for
“heavy duty”, to indicate heavy and demanding jobs.
MP 1000HD
The MP 1000HD cutter head was created for the specific project of
removing damaged surfaces in tunnels on behalf of Amplia Infrastructures,
formerly Pavimental, a subsidiary of Autostrade per l’Italia,
a company specialized in the construction and maintenance of
motorway civil works and plant engineering.
Designed for excavators from 35 to 60 tons customized for tunneling,
the HD version differs from the MP model of the same width
due to several operational characteristics:
• piston motors in direct drive with the drum which release a hydraulic
power of 200 kW and a cutting force of 65 kN;
• hydraulic depth adjustment up to 150 millimetres via side wheels;
• independent depth adjustment on RH and LH wheels to easily
make side-by-side passes;
• hydraulic wall alignment device;
• 360° hydraulic rotation;
• nebulizer kit for enhanced dust suppression.
The MP 1000HD is a special piece of equipment, with an operating
weight of over 4000 kilograms, which requires a dedicated excavator,
with high hydraulic capacity, to be able to perform on tunnel
Gli innovatori
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