Main Project News – Trevi SpA (EN)

The several first of its kind applications projects completed by TREVIICOS in the US

Among the projects completed by TREVIICOS in the US, several were first of its kind applications: W.F. George (AL), the first secant pile cutoff wall under water ever constructed; Herbert Hoover Dike (FL), fist time installation of cutoff wall by self-hardening-slurry by hydromill for a total of over 8 million square feet; LPV 111 (NOLA […]

A combination of equipment and techniques for the installation of the secant piles

Treviicos-Nicholson JV selected the secant piles for the construction of the cutoff wall part of the Boone Dam Internal ErosionProject. The secant piles were installed using a combination of equipment and techniques: piling rigs were used to drill through the embankment and the alluvial, to depth of approximately 100 ft, using segmental casings. Reverse circulation top pile rigs […]

A combination of equipment and techniques for the installation of the secant piles

The installation of the cutoff wall by the Treviicos-Nicholson joint venture at Boone Dam, started in 2019 and was completed in February 2021, allowing TVA to restore normal operations of the reservoir to pre-2014 levels, 17 months ahead of schedule. The Boone Dam Project was a further achievement in the decades-long experience established by the TREVI Group in the […]

Secant piles technology for the cutoff wall installation, part of the Boone Dam Internal Erosion Remediation Project

For the cutoff wall installation, part of the Boone Dam Internal Erosion Remediation Project, the Treviicos-Nicholson Joint Venture selected the secant piles technology as the most appropriate and safest methodology to address all the dam safety requirements. The Secant Pile was installed maintaining a strict alignment and overlap requirements while penetrating through a challenging mixture of soil and highly weathered rock within the upper portions […]

Treviicos awarded for the contract for the installation of the cutoff wall for the Boone Dam Internal Erosion Remediation Project

The program related to the Boone Dam Internal Erosion Remediation Project, included five components: low mobility grouting, high mobility grouting, stability berms, cutoff wall, crest floodwall. After the completion of the enabling grouting works, in 2018 the Treviicos-Nicholson Joint Venture was awarded the contract for the installation of the cutoff wall. With the working platform at approximately elevation […]

TREVIICOS partecipation in the Boone Dam Internal Erosion Remediation Project

Between 2019 and 2021, TNJV, a Joint Venture formed by TREVIICOS and Nicholson, took part to the Boone Dam Internal Erosion Remediation Project. Located upstream of Kingsport, TN (USA), is owned and managed by TVA, Tennessee Valley Authority (TVA). Built in 1953, the barrier has an 850-ft long concrete gravity dam section, and an 850-ft long […]

The MATOC Task Order #2 project, part of the Herbert Hoover Dike Rehabilitation

The MATOC Task Order #2 project is part of the Herbert Hoover Dike Rehabilitation of the Levee system around Lake Okeechobee. It cover a Section of over 7.0 miles of Lake Okeechobee between Clewiston and Moore Haven, FL. The Contract for TREVIICOS started on July 2019 and included the installation of approx. 1.8 million SF […]

The Hidden Beauty of the Foundation Works

December 2021 saw TREVIICOS completing 6.5 miles of cutoff wall at the HHD Reach 1 Cutoff Wall Extension Project in South Bay, FL. Another successful intervention related to the HHD rehabilitation project. The work consisted of the Installation of a SHS (self-hardening slurry) cutoff wall by Hydromill, including the connection with previously cutoff wall that […]

Herbert Hoover Dike: the MATOC 4

The MATOC 4 project is part of the Herbert Hoover Dike Rehabilitation of the Levee system around Lake Okeechobee. It covers a section of of the dike of 3.7 miles nearby Moore Haven (FL). The scope of work included the Installation of a self-hardening slurry cutoff wall by Hydromill, Jet Grouting cutoff wall to connect […]

Herbert Hoover Dike Gap Closure: technologies employed

The Herbert Hoover Dike Reach 1 Gap Closure Project awarded to TREVIICOS (2017- 2019) included the construction of sections to close the gaps between cutoff walls and existing structures at different locations along approximately 30 miles stretch around HHD. For this project TREVIICOS constructed the cutoff wall with two different technologies; first, the installation of […]

Herbert Hoover Dike Gap Closure

In 2017 Treviicos returned to the Herbert Hoover Dike Rehabilitation with Reach 1 Cutoff Wall Gap Closure project. The project required the installation of a cutoff in areas of the Dike in the proximity of existing structures. Due to the locations, the cutoff wall was specified as combination of conventional cutoff and cutoff by jet […]

Herbert Hoover Dike cuttoff walls construction

The US Army Corps of Engineers awarded to TREVIICOS multiple Herbert Hoover Dike Rehabilitation Task Orders for the construction of one of the main components of this project, a cutoff wall within the levee to eliminate the existing seepage through the levee foundation and limestone layers below. The work extended from 2008 to 2013. Acting […]

The Chacao Bridge

The Chacao Bridge in Chile will be among the most important crossing bridges in South America. It will connect the island of Chiloe to the mainland thanks to its total length of about 2,750 m. Trevi Chile Spa, the Chilean subsidiary of Trevi SpA, will lay the foundation piles on which the bridge will be built. For […]

The foundation elements chosen by Trevi Spa for the 4 Frankfurt project

The foundation elements chosen by Trevi Spa are bored piles whose diameter varies from 1500 to 2000 mm. Considering that the execution plan is significantly higher than that of the foundation, piles are uncased for the first 20 meters, obtaining total drilling distances of up to 50 m. Piles are cased in the upper part […]

Climate and temperatures: an important aspect in the UDK02 Drammen-Kobbervikdalen project

Climate and temperatures represent an important aspect not only for the operational technical details, but also for safety. Most of the Trevi Spa workers involved in the UDK02 Drammen-Kobbervikdalen project, had never faced the Norwegian winter before, which can be harsh at times, both with regard to the temperatures and the reduced daylight. All these […]

Trevi Spa different nationalities workers involved in the UDK02 Drammen-Kobbervikdalen project

During the peak phase of operations more than 70 Trevi Spa workers of different nationalities were involved in the UDK02 Drammen-Kobbervikdalen project. While most of the staff is from Italy, we also have Norwegians, Polish, Germans, Austrians, and Ukrainians. With all these different nationalities, you not only have several different mother tongues, but it’s essential […]

Few numbers to illustrate the complexity of the work implemented by Trevi Spa for the Drammen-Kobbervikdalen

A few numbers can illustrate the complexity of the work implemented by Trevi Spa for the Drammen-Kobbervikdalen high-speed line project: to date, a total of over 40,000 linear meters of drilling and over 12,000 linear meters of jet grouting have been carried out with different diameters: from 1,000 mm for the monofluid columns, to 2,500 […]

Trevi Spa has 6 different teams working on the Drammen Cut&Cover Tunnel Project

At this stage of the works for the Drammen-Kobbervikdalen high-speed line project, Trevi Spa has 6 different teams working. Each is equipped with a pre-drilling rig and a jet grouting rig and they are carrying out the treatment in the “full-face” and “mixed-face” areas. In some areas we are about to start inclined jet grouting, […]

The Covid 19 pandemic impact on the organization of the Trevi spa for the UDK02 Drammen-Kobbervikdalen project

The Covid 19 pandemic also had a major impact on the organization of the Trevi spa works for the UDK02 Drammen-Kobbervikdalen project. Trevi had to make a lot of effort to master all challenges regarding behavioural regulations, travel restrictions and so on. New procedures have been introduced at workplaces to avoid contact and possible infection. […]

Drammen-Kobbervikdalen high-speed line project: Trevi Spa Mastering the Task Video

Have a look at our fantastic “Mastering the Task” video dedicated to the involvement of Trevi Spa in the construction and development works of the “New double track UDK02 Drammen-Kobbervikdalen”, which is part of the InterCity initiative and represents one of the largest railway projects of Norway.

Drammen-Kobbervikdalen high-speed line project: Trevi Spa carried out pre-drilling with a DTH hammer.

Given the type of soil to be treated and the geometry of the work related to the Drammen-Kobbervikdalen high-speed line project, in order to provide the highest quality standard and control of deviations, for #TreviSpa it was necessary to carry out pre-drilling with a DTH hammer. The monitoring of the deviations with an inclinometer instrument […]

The third macro areas of the UDK02 project changes from cut and cover to soil tunnel

The third macro areas of the UDK02 project for the construction of the new Drammen-Kobbervikdalen high-speed line , changes from cut and cover to soil tunnel. In this area Trevi Spa consolidates the soil ring surrounding the excavated section. This section is called “full face” because the consolidated ring surrounds the entire tunnel section. In […]

UDK02 Drammen-Kobbervikdalen project: it can be divided in 4 parts

The UDK02 project in which Trevi Spa is involved, which consists in the progressive underground construction of the new Drammen-Kobbervikdalen high-speed line, can be divided into 4 macro-areas that follow one another from the surface to the fully-underground tunnel. The first part consists in a cut and cover with metal sheet piling, followed by the […]

Veidekke and the cooperation with Trevi Spa, an extremely valuable partner

Since building tunnels in loose soil is a relatively unknown construction method in Norway, the development of the construction plan for the #DrammenKobbervikdalen project, was made by #Veidekke in cooperation with international experts, among which #TreviSpa that, thanks to its long experience, is an extremely valuable partner. Trevi carries out the tunnel soil consolidation by […]

Veidekke signed a contract with Bane NOR for the double-track project Drammen-Kobbervikdalen on the Vestfold line

Veidekke, a leading construction contractor with a clear market position in and around urban centres in Scandinavia, at the end of 2019 signed a contract with Bane NOR for the double-track project Drammen-Kobbervikdalen on the Vestfold line. Veidekke section runs through the residential districts on the outskirts of Drammen city and includes the construction […]

Bane NOR and the ”New double track Drammen-Kobbervikdalen” development project

Bane NOR, the Norwegian state-owned company responsible for the national railway infrastructure, is carrying out the ”New double track Drammen-Kobbervikdalen” development project that is part of the InterCity initiative and one of Norway’s largest railway projects. Construction works began in the autumn of 2019 and are scheduled to end in the autumn of 2025. Once […]

The UDK02 Drammen-Kobbervikdalen project

In over 60 years of activity, Trevi has remarkably specialised in the field of underground Engineering and has become a recognised world leader in several fields. It is also thanks to this history of expertise and innovation that we are called upon from all over the world for highly challenging projects, such as the one […]

Lonato del Garda Tunnel: “Mastering the Task” Video

The new Brescia-Verona High-Speed/High-Capacity railway line is a key project of the Milan-Verona railway link. It is part of the Turin-Trieste line which, in turn, is part of the wider system connecting Spain to the Ukrainian border. The project, whose implementation has been entrusted to the CEPAV DUE consortium, has been commissioned by Rete Ferroviaria […]

Lonato del Garda Tunnel: Trevi Spa and the first results of the post-treatment tests

To date, in relation to the consolidation and foundation works for the Lonato Tunne, #TreviSpa is completing the intervention phase on the A4, and the first results of the post-treatment tests have shown a clear increase in the mechanical characteristics of the consolidated soils. The continuation of the interventions will be subject to further investigations […]

Lonato del Garda Tunnel: Trevi Spa solution to save precious time

When carrying out the consolidation and foundation works for the Lonato Tunnel, Trevi Spa contacted A4 Autostrada to be allowed to drill from above, occupying two lanes per carriageway alternately, while keeping car traffic almost unchanged. This solution allowed Trevi to save precious time for the consolidation of the ground between the tunnel and the […]

Lonato del Garda Tunnel: the results of the test field carried out by Trevi Spa

The results of the test field carried out by Trevi Spa – in the preliminary investigation for the evaluation of the soils to be consolidated as part of the work for the Lonato Tunnel – were very interesting and allowed substantial changes to be made to the initial project: · The design mesh was remodelled […]

Lonato del Garda Tunnel: the involvement of Trevi Spa

As part of the construction of the #LonatoTunnel, the most complex and articulated railway work on the HS/HC Brescia Est-Verona railway line, #TreviSpa was involved in order to pre-consolidate the soils concerned by the excavation of the future tunnel. The initial project envisaged that the sections to be consolidated would be approached by three different […]

Lonato del Garda Tunnel, the most complex and articulated work on the Brescia East-Verona High-Speed/High-Capacity railway line

Trevi SpA was entrusted the consolidation and foundation works for the Lonato del Garda Tunnel, the most complex and articulated work on the Brescia East-Verona High-Speed/High-Capacity railway line. The new railway line is a fundamental project within the Milan-Verona railway link. It is part of the Turin-Trieste line which, in turn, is part of the […]

Metro Manila Skyway: technical complexity

The Manila Skyway Stage 3 has been one of the largest and most prominent project in the last few years in Philippines, from a technical point of view as well as logistical. Technical, because the largest diameter of the piles implemented by Trevi Philippines was 3500 mm with an average depth of 40 linear […]

Metro Manila Skyway: the logistic management of the works in one of the most congested megacities in the world

One of the greatest complexity involved by the works of the Metro Manila Skyway, regards the logistic management of the works in one of the most congested megacities in the world. A high voltage line run along a large section of the layout and it could have blocked the execution of the piles until its removal. To avoid […]

Metro Manila Skyway: equipment used

Soilmec drilling rigs used by Trevi Philippines for the Metro Manila Skyway project have been: SR-100, SC-100, SA-40, R-930, R-625, R-618 and SR-70. From a geological point of view, Metro Manila lies on a layer of consistent tuﬀ, locally known as Adobe, on which the recent alluvial sediments rest, with strong side heterotopias. Given its length, […]

Metro Manila Skyway: of the most important and complex infrastructure projects of the Philippines

The Metro Manila Skyway is an elevated highway and motorway under construction in the southern part of Manila and represents one of the most important and complex infrastructure projects of the Philippines of the last decade and will be carried out in complex logistical and geotechnical conditions. The project involves the construction of an urban motorway viaduct (Skyway) overpass with 6 lanes […]

Grand Paris Express Mastering the Task Video

Cityringen in Denmark, the metro of Algeri, Metro C in Rome are just some of the subways in which Trevi has taken part in recent years. And it is thanks to the great experience in the underground transportation sector that Trevi Spa has been called to participate in the Grand Paris Express project. In the […]

In addition to the Grand Paris Express stations, Trevi also works on the TBM launch well

In addition to the stations, Trevi also works on the TBM launch well, the equipment that will excavate the underground lines; one of these is under construction in the town of Chelles, north-east of Paris, on a construction site on line 16 of the metro. This well is particularly difficult since it has a very […]

Saint Denis Pleyel station is the main station of the whole Grand Paris project

Saint Denis Pleyel station is the main station of the whole Grand Paris project, as it connects 4 metro lines with 2 railway lines and is located near the “Stade de France”. The peculiarity of this station lies in its 9000 mq of surface and its excavation with the “Top-Down” method: in order to allow […]

In the Grand Paris Express project,: all the structures require construction of reinforced concrete retaining walls

In the Grand Paris Express project, all the structures (undergroud stations and TBM launch shafts) are executed at a significant depth and require the construction of reinforced concrete retaining walls through diaphragm walls that sometimes can reach more than 60 m in depth. For executing these works, in consideration of the excavation depth to be […]

Grand Paris Express: Trevi Spa actively involved in the construction project for lines 16 and 17

Trevi Spa, in its quality as deep foundation contractor, is actively involved in the construction project thanks to various contracts for lines 16 and 17, on behalf of EIFFAGE Génie Civil, SEFI-INTRAFOR, NGE Génie Civil and DEMATHIEU BARD Construction. In particular, TREVI is involved in the construction of the underground stations of Le Bourget Airport, […]

Grand Paris Express Project will include the construction of around 60 new stations

Grand Paris Express will include the construction of around 60 new stations that will be built to better serve the territories of the Paris regions. This project aims at limiting car use, improve air quality and support the economic development of the region. It will encourage direct suburb-to-suburb journeys, without having to pass through the […]

Grand Paris Express: the largest infrastructure project currently under construction in Europe.

The Grand Paris Express is the largest infrastructure project currently under construction in Europe. The Project owner is Société du Grand Paris. A total amount of Euro 30 billion are planned for the construction of 200 kilometres of a modern public transport network. It consists of the extension of line 14 of the metro and […]

Grand Paris Express Project

In the coming weeks we will talk about the grandiose Grand Paris Express project and Trevi’s role in carrying out the works on some of the lines of this metro. Are you curious? Take a look at the video!

Retention and soil improvement of the Drammen cut & cover and tunnel

In Norway TREVI S.p.A. has been awarded by Veidekke Entreprenør, the largest Norwegian construction company, the retention and soil improvement of the Drammen cut & cover and tunnel, which is part of the Vestfoldbanen section from Drammen to Kobbervikdalen. The project is complex, crossing a densely populated residential area with heavy traffic and several interferences on steep surfaces. It […]

Chacao Bridge: the “Mastering the task” video

This is the video of an impressive project that tells the role of Trevi Chile and its team of experts and all the challenges faced over the last 3 years in the construction of the foundation piles of the Chacao bridge: the longest suspension bridge in South America that will connect the island of Chiloè […]

Chacao Bridge: a barge to carry out the works offshore

In order to carry out the Chacao Bridge works offshore, the main Contractor Hyundai, provided a 50 x 28 m barge fitted with four long support legs (Jack up) Pioneer III, with a 3,600 t capacity along with a fixed platform, where the Concrete batching plant was located. The Jack Up barge housed: a 400t service […]

Chacao Bridge: how Trevi Chile adapted the construction process of the piles according to the extreme conditions

In the Chacao Bridge, the construction process of the piles carried out by Trevi Chile Spa, was adapted according to the soil/rock conditions of the site and the extreme working conditions of the Chacao Channel. Initial phase of Ø3,000mm temporary casing installation Pre-drilling using a Ø2,750mm auger Permanent casing installation and driving to the final position Removal of the […]

The works carried out for the Central Pylon of the Chacao Bridge by Trevi Chile Spa

The works carried out for the Central Pylon of the Chacao Bridge by Trevi Chile Spa were the following: · 36 piles with a 2500 mm wide diameter and a 54 or 58 m length · Total volume of concrete cast on piles: 10,713 m3 · Steel Rebar used for the Reinforcement cages: 2,256t · Steel used for the Steel Casings: […]

Trevi Chile Spa: assembly of the reinforcement cages and welding of steel casings

In addition to the casing installation, drilling works and concrete casting on the Chacao Bridge Central Pylon, Trevi Chile Spa was in charge of the assembly of the reinforcement cages and the welding of steel casings. Using a modern welding system, all the sections of the casing were assembled despite their different thicknesses, in order to […]

Chacao Bridge: main challenges faced by Trevi Chile

Ocean currents and weather conditions were among the challenges TREVI CHILE SPA had to face during the execution of the Chacao Bridge Central Pylon. Notwithstanding the above, the main technical challenge Trevi Chile had to overcome was the size of the piles, along with the length, diameter and weight of the permanent steel casings and […]

Trevi Chile currently working on both Chacao Bridge North and South Pylons

TREVI CHILE SPA was selected by the consortium to carry out the foundations of the Chacao bridge piles: namely the Central Pylon, already finished, and the North and South Pylon (that are currently being built). The foundation works of the central pylon consisted in the execution of 36 piles with 2.5 m wide diameters and lengths […]

Chacao Bridge: the longest suspension bridge in South America

The Chacao Bridge length will be 2,574 m and will consists of three main pylons, one in the middle of the channel and two on each side, namely the North Pylon on the continent side and the South Pylon on the Chiloé’s side. The lights between the Central and North Piles will stretch for 1,553 m, while the ones between […]

Crossing the Chacao canal in only three minutes

Route 5 is the longest highway in Chile, stretching from Arica to Quellón in Chiloé, hence connecting the country throughout a 3353 km long highway. The road is interrupted between the continent and the Chiloé Island by the Chacao Channel, where all traffic runs, via a 30 to 45 minutes long trip by ferry. Trevi Chile Spa, the […]

The challenges faced by Trevi Spa for the Drammen-Kobbervikdalen high-speed line project

The challenges faced by Trevi Spa for the Drammen-Kobbervikdalen high-speed line project are several and complex. A relevant one relates to the type of soil to be treated, a moraine deposit made of sand, gravel and pebbles with stones of various sizes. Another one worth mentioning concerns the geometry of the work, which involves a […]

4 Frankfurt: Mastering the Task

FOUR Frankfurt is an imposing project in the financial heart of Frankfurt, which involves the construction of 4 skyscrapers making up a district that will perfectly integrate with the public spaces of the city and its inhabitants. A brave project that will redefine the skyline of the German economic capital, but which will also keep […]

Praise to Trevi

Mr. Wünsch, the Project Technical Director of “Gross&Partner” and owner of the F4 real estate complex, said: “Since the very pre-contractual phase, Trevi Spa has been and is now still proving to be a very cooperative and reliable partner. From a purely technical point of view, Trevi Spa has proven to be extremely efficient thanks […]

4 Frankfurt: a real challenge

Working in the city center is one of the main challenges of the project, combined with the need to carry out works simultaneously in all areas and the relevant logistical needs, which add to the enormous pressure imposed by compliance with the agreed deadlines. Thanks to the support of the Trevi Design Office, that proposed an alternative […]

An innovative system for positioning prefabricated columns inside some foundation piles

As part of the Frankfurt 4 project, Trevi Spa has adopted an innovative system for positioning prefabricated columns inside some foundation piles. For their installation, reinforcement cages are installed once the drilling of the piles is completed, Subsequently, a collar positioned around the casing will serve as a guide and support for the installation of the […]

Top-down method for the foundation works of the 4 Frankfurt project

Trevi Spa used the top-down method – as chosen by the designer – to carry out the foundation works for the F4 project, considering that the span between the perimeter walls requires contrasting elements with a length of over 100 m. 230 prefabricated columns were inserted on top of foundation piles in order to support both the structural loads of […]

The Herbert Hoover Dike rehabilitation projects

Since 2008, TREVIICOS has been involved in the works for one of the most important rehabilitation projects ever made on a dike (levee), namely, the Herbert Hoover Dike (HHD). The HHD is a 143-mile earthen dam that surrounds Lake Okeechobee, the second largest freshwater lake wholly within the United States, in south central Florida. The HHD […]

Trevi Spa carried out the construction of the 4 Frankfurt perimeter wall

Trevi Spa carried out the construction of the perimeter wall, serving as foundation and protection of the excavation planned for the 4 skyscrapers of the Frankfurt project, as a diaphragm wall and, in this case, through two different methods. Basically, the excavation of the foundations is carried out by a mechanical bucket. However, due to […]

Trevi Spa in the 4 Frankfurt project: the video

Trevi has been involved since 2018 in the foundation works for the ambitious FOUR Frankfurt project, that will litterally reshape the financial district of the German economic capital. Have a look at our video made by colours, music, people and emotions and join with us the Frankfurt job site!

Trevi Spa role in the 4 Frankfurt project

Trevi Spa is carrying out the foundation works for the ambitious FOUR Frankfurt project. The works include the construction of the foundation and protection perimeter wall of the excavation. Said procedure is carried out through the construction of a diaphragm wall and the production of about 380 large diameter bored piles (Ø up to 2000 […]

In 2018 Trevi Spa started the foundation works for 4 Frankfurt project

In 2015, “Groß und Partner Grundstücksentwicklungsgesellschaft”, one of the leading German companies in the real estate sector that is specialized in the field of building development in city centers, laid the foundations for the execution of the major #FOURFrankfurt project. #F4 is an exclusive complex of 4 skyscrapers located on a multi-level and multifunctional foundation […]