Week 26 — 27 June 2016
The last section of retaining wall was cast for the Accelerator tunnel (G01). Stairs were installed in the emergency exits, and a stair tower in the CTL tunnel. The tower provides access to the Gallery building (G02) Cold Box area. In G02, roofing in section 5 was completed. Internal works continue in the Cryo Control Office, including elevator installation. Ventilation work is ongoing in the two large halls of the Cryo-Compressor Building (G04). Installation of prefab culvert from G04 to the CTL gallery continues. Two of the seven 9-meter long ramps between the Beamline Gallery (E02) and Experimental Hall 3 (E01) were cast. A Section Handover Inspection (SHIN) was performed on the completed Primary substation (H05) building.
The last section of the retaining walls is cast for the Accelerator tunnel. PHOTO: ESS
Prefab culvert between the Gallery building and the Cryo-Compressor Building is nearly complete. PHOTO: ESS
Ramp between the Experimental Halls is ready for casting. PHOTO: ESS
Week 25 — 20 June 2016
Reinforcement work on the base slab of the Front End Building. PHOTO: ESS
Facade of the Cryo-Compressor Building. PHOTO: ESS
Reinforcement in Monolith West. PHOTO: ESS
Installation of removable walkway connecting the Gallery building and Cryo-Compressor Building. PHOTO: ESS
Week 24 — 13 June 2016
The Installation Galleries in Experimental Hall 2 and concrete pilings in the Beamline Gallery. PHOTO: ESS
View of the Target building. PHOTO: ESS
Week 23 — 6 June 2016
Overview of Gallery building and Cryo-Compressor Building. PHOTO: ESS
Steel core piling in the Utility area of Target. PHOTO: ESS
View of Experimental Hall 3 and Beamline Gallery. PHOTO: ESS
Week 22 — 30 May 2016
Installation of large concrete elements began in the HEBT Loading Bay of the Accelerator tunnel. Flooring was cast in section 3 of the Gallery building (G02). Backfill is ongoing on either side of the Target building for the Experimental Halls (D01, D03). Concrete works are beginning for the ramps connecting Experimental Hall 1 (E01) and the Beamline Gallery (E02). To date, one-third of the concrete pilings are completed in the Beamline Gallery. MEP installation has also started in the Linac Hall of the Cryo-Compressor Building (G04) in sections of the Gallery area and Cold box.
HEBT Loading Bay of Accelerator tunnel. PHOTO: ESS
Topfill being applied to the Accelerator tunnel. PHOTO: ESS
Casting a wall for the Experimental Hall. PHOTO: ESS
Week 21 — 23 May 2016
Cranes near the Front End Building of the Accelerator tunnel. PHOTO: ESS
Cryo Compressor building ready for facade work to begin. PHOTO: ESS
Ongoing form work at the Target station. PHOTO: ESS
Week 20 — 16 May 2016
Work was completed for stubs 1-20 and 27 of the Accelerator tunnel (G01). Ventilation duct installation is ongoing for the cold box and loading area of the Gallery building (G02). In the Target area, refill has begun for the tunnels of the Installation Gallery in Experimental Hall 1 (D01). This included the erection of a bridge to allow access for transportation to Target across the tunnels of Experimental Hall 2 (D03). Excavation for lab building (D07) was also completed. The first flooring slab for Experimental Hall 3 (E01) was made ready for casting.
Installation of ventilation ducts in the cold box hall of the Gallery building. PHOTO: ESS
Tower crane in the Target area. PHOTO: ESS
First bottom slab of Experimental Hall 3 is ready for casting. PHOTO: ESS
Week 19 — 9 May 2016
The final two of 63 large-diameter piles were cast in the Hot Cell area of Target. PHOTO: ESS
Steel beams erected for the HEBT Loading Bay. PHOTO: ESS
Reinforcement work for Experimental Hall 3. PHOTO: ESS
Week 18 — 2 May 2016
Structural completion of the Dog-Leg emergency exit. PHOTO: ESS
Reinforcement works ongoing for the Cryo-Compressor Building. PHOTO: ESS
Blinding and reinforcement for Experimental Hall 3. PHOTO: ESS
Piping installed for Experimental Hall 3. PHOTO: ESS
Week 17 — 25 April 2016
Backview of the Cryo Compressor Building. PHOTO: ESS
Reinforcement works for the ground floor of the HEBT Loading Bay. PHOTO: ESS
Blinding laid for the flooring of Experimental Hall 3. PHOTO: ESS
Week 16 — 18 April 2016
Backfill work around the Accelerator tunnel. PHOTO: ESS
Installation of steel roofing in the server area of the Central Utility Building. PHOTO: ESS
Large-diameter bored piles in the Hot Cell area of the Target station. PHOTO: ESS
Area with concrete piling cleaned near Experimental Hall 3. PHOTO: ESS
Week 15 — 11 April 2016
The Accelerator tunnel was structurally completed end-to-end from the FEB to the the Dog-Leg section, and celebrated during a ‘topping off’ ceremony. In the large Gallery building (G02), steel erection is ongoing, and detailed excavation is taking place in Substation 7 and 8. Reinforcement is being applied to the gas storage area of the Cryo-Compressor building (G04). In the Monolith area, all 42 large-diameter bored piles are now completed, and steel core piling has begun in the nearby Utility area. For the Target building, work continues in the Installation Galleries, with prefab top slabs installed in Experimental hall D03. Basement excavation of Substation D06 and Lab building D07 is also finished.
Final vault is cast in the Dog-Leg section to complete the Accelerator tunnel. PHOTO: ESS
Beam dump area in the Dog-Leg section. PHOTO: ESS
Prefab work on the large Gallery building. PHOTO: ESS
Preparation of remaining piles in the Monolith area. PHOTO: ESS
Week 14 — 4 April 2016
The final vault of the Accelerator tunnel (G01), located in the Dog-Leg section, will be cast early this week. Prefab work is largely complete and metal roofing has been installed in the large Gallery building (G02). Casting of the floors in the Cold Box and Loading halls is underway. Preparation for blinding in Experimental Hall 3 (E01) is ongoing, and refill has begun for the adjoining lab area, E04. At the Target station, 40 of the 42 bored piles in the Monolith are complete. The Hot Cell area has all 21 concrete rings and one pile complete, with five additional piles prepared for casting.
Refill of the emergency exits, HEBT Loading Bay, FEB and top of the Accelerator tunnel continues. PHOTO: ESS
Side view of the 62-meter-long Dog-Leg section. PHOTO: ESS
Preparation of the Target Hot Cell area. PHOTO: ESS
Week 12 — 21 March 2016
An important milestone was reached this week for the Accelerator tunnel with the casting of the final roof slab, E25b, on the FEB side. The Dog-Leg section had its last major vault completed, with only one smaller vault remaining. Preparation for vault casting begins now for the Dog-Leg emergency exit. Backfill of the HEBT Loading Bay continues on the tunnel roof and emergency exits. Work is also ongoing to erect steel frames in the large Gallery building (G02), with floor casting begun in the Cold Box hall. In the Target area, 39 of the 42 bored piles as well as six piles in the Hot Cell section are completed, and in the Target building, 3 roof slabs are ready in the Experimental Halls.
The final vault of the Accelerator tunnel is cast. PHOTO: ESS
Dog-Leg emergency exit being prepared for initial vault casting. PHOTO: ESS
Ongoing backfill of the HEBT Loading Bay. PHOTO: ESS
Roof slab installed in Experimental Hall 1. PHOTO: ESS
Week 11 — 14 March 2016
Preparations of the final roof slab of the Accelerator tunnel (E25b) are underway, with casting planned for next week. Only two top slabs remain in the Dog-Leg area thereafter. The Accelerator tunnel also had its first client installation this week—a 12-meter long stainless-steel Cryo Vent Pipe. Insulation and backfill activities are progressing at the HEBT Loading Bay, whereas the nearby Gallery Building (G02) will have a first base slab of floor sections 1-3 ready for casting next week. Testing and commissioning of the ABB switchgear in the main power station (H05) continues, and installation of the facade has begun. In the Monolith area of the Target Station, 38 of the 42 bored piles are now complete, and six piles are started in the Hot Cell section. In the Target building, work is ongoing to prepare the first top slabs of the Installation Galleries. The corner foundation is ready for the later installation of the first Target crane.
Large bored piles being installed in the Monolith area of the Target Station. PHOTO: ESS
The final roof slab of the Accelerator tunnel (G01) is prepared. PHOTO: ESS
Insulation and backfill are applied to the HEBT Loading Bay. PHOTO: ESS
Tests of the ABB switchgear are ongoing at main substation H05. PHOTO: ESS
The large-diameter bored piling for the Monolith and Hot Cell areas of the Target Station progressed to 85% complete in spite of the difficulties of drilling through dolerite. The recent drilling of one hole took a full three days. Six of the 42 drilled piles remain. The Cryo-Compressor Building (G04) is now into roofing works, and the large Gallery (G02) and Central Utility (H01) buildings expand daily with the installation of steel and prefab concrete elements. The HEBT Loading Bay will soon disappear from site, as all repair and insulation work was finished last week and backfill will now begin. Following close behind will be the Accelerator tunnel, which now has a single roof slab left to be cast before it is complete.
Drone photo of the HEBT Loading Bay (foreground), Accelerator tunnel, Gallery Building, Cryo-Compressor Building, and the Central Utility Building (with crane). Backfill of the HEBT Loading Bay will begin this week. PHOTO: ESS
Large-diameter bored piling rig in action (left). The Gallery Building extending east along the Accelerator tunnel. PHOTOS: ESS
Week 8 — 22 February 2016
The complex High-Energy Beam Transport (HEBT) Loading Bay ramp that zig-zags off from the south side of the Accelerator tunnel reached substantial completion, with backfill to begin this week. Two more vault sections on the Accelerator tunnel were cast, E24b on the front end and E02b on the target end, meaning the tunnel remains on schedule to be completed March 10. Placement of precast elements and steel structure for the Gallery Building (G02) continues to progress rapidly, while facade work continues on the first two buildings to be completed, power stations H05 and H06. The lift pit for the first lab building, E04, is being outfitted with walls, and work on a gas storage area adjacent to the Cryo-Compressor Building (G04) has begun. The first of 21 large-diameter bored piles in the Target Station’s Hot Cell area (D02) also began last week.
Left: Stubs running along the completed sections of the Accelerator tunnel, with the completed HEBT Loading Bay ramp on the other side of the tunnel. Right: Workers building the walls for the E04 lab building lift pit. PHOTOS: ESS
Ground-level view of the Central Utility Building. PHOTO: ESS
Week 7 — 15 February 2016
Work on the installation tunnels that snake beneath the Target Station proceeded rapidly, with more than 370 cubic meters of concrete placed so far. This will literally pave the way for the start of foundation works for the Target Building (D02) next month. Excavation for a tower crane was begun in preparation for construction of the large instrument hall south of the Target Station (D01), and steel core piling for the Hot Cell area was completed, with drilling for the 21 bored piles now underway. Further progress was made on the erection of the Gallery Building (G02) steel structure, with precast elements and the floor slab progressing in the existing structure. The second transformer for the main power station (H05) was delivered and is now being installed. The Accelerator tunnel (G01) is meanwhile on schedule to have a complete roof in less than three weeks.
HEBT Loading Bay (left), Accelerator tunnel (center), and Gallery Building (right) all nearing structural completion. PHOTO: ESS
Infrastructure on the site is rapidly taking shape. Transformer for the power station (left), and some of the extensive piping works taking place across the site. PHOTOS: ESS
The Cryo-Compressor Building, linked to the Accelerator tunnel with a tunnel of its own, already completed and buried. PHOTO: ESS
Week 6 — 8 February 2016
Concrete piles were installed marking the paths of the long neutron beam guides that will run more than 150 meters west from the Target Station to Experimental Hall 3 (E01). Works on the foundation and basement for the nearby lab building (E04) have progressed and concrete casting is near. Walls are now being cast for the Target Station installation tunnels, and 33 of the 42 large-diameter bored piles that will support the Monolith are complete. Work has begun on the additional 21 large piles for the Hot Cell area. The complex work for the roof of the Central Utility Building (H01), which will need to house and support exterior mechanical equipment, is now the focus there. Casting of the final concrete elements of the Accelerator tunnel (G01)—vaults, emergency exits, stubs and the retaining wall—continues steadily, while preparations have been made to begin casting the interior floor of the Gallery Building (G02).
Basement work for Experimental Halls Lab 3B (E04). In the background is the village of concrete piles for the Experimental Hall 3, where the instruments with the longest beam guides, up to 156 meters, will be housed. PHOTO: ESS
Roof works on the Central Utility Building. PHOTO: ESS
A first look at an ESS facade. Panels being installed on the electrical substation H06. PHOTO: ESS
Target Station installation and service tunnels. PHOTO: ESS
Week 5 — 1 February 2016
The walls of the Accelerator tunnel (G01) were completed on Friday, running 537 meters from the Front End Building to the Target Station. Additional progress was made on several Stubs, the tunnel backfill and retaining wall, and on casting of the tunnel’s emergency exit structures. Substantial completion of the steel structure and precast walls for the Cryo-Compressor building (G04) was reached, and installation of roof panels has begun. The Target Monolith area saw the completion of four additional large-diameter bored piles, the installation of which remains on schedule for completion by the end of March. The switchgear for the distribution substation H06 was delivered this week in the form of 38 800-kilogram units. A full roundup of construction progress to date and what to expect in 2016 was posted to the website this week.
Here is a project summary. Please refer to the site plan for building number references:
Where the Accelerator tunnel meets the Front End Building. The tunnel's 537 meters of walls were completed this week. PHOTO: ESS
Shrinkwrapped switchgear for distribution substation H06. Thirty-eight 800-kg units were delivered this week. PHOTO: ESS
Accelerator tunnel emergency exit under construction. PHOTO: ESS
Week 4 — 25 January 2016
Several more castings on the Accelerator tunnel were completed, leaving only 10 meters before the walls of the tunnel meet the Front End Building. Backfill of the tunnel sides has also progressed from the Dog-Leg area to the HEBT area, with dirt already being moved onto the top of the tunnel. The first casting in the Experimental Halls (E03) area was done this week, preparing the surface for the reinforcement and base slab soon to follow. Large-diameter bored piling in the monolith area of the Target Station (D02) just got a bit harder as the drills have encountered a layer of dolerite. Twenty-five are nonetheless now completed. Interior construction and roofing continue to progress on the Gallery Building (G02), and a major wall for the Central Utility Building (H01) was cast this week. The next expansion of the site offices has begun in order to accommodate the growing on-site staff.
Aerial views of the site from January 18, 2016. Click to see full-size images. Clockwise from top left: Target Station piling, Gallery Building and Accelerator tunnel dog-leg, Accelerator tunnel meeting the Front End Building, and piling and blinding in the Experimental Halls (E03) area. PHOTOS: Perry Nordeng
Week 3 — 18 January 2016
The Accelerator tunnel edged toward completion this week with the casting of vaults on the dog-leg section and section E22a near the Front End Building. This leaves about 70 meters to the Front End Building, and a 10-meter section on the Target end that will be the final vault cast. The adjacent Gallery Building (G02) moved into roofing works, with installation of interior wall panels and floor slabs underway. The Cryo-Compressor Building (G04) is taking shape with additional steel frame and precast concrete elements installed this week. In the Target monolith area, 22 of the 63 large-diameter bored piles are completed, with steel and concrete piling continuing in the adjacent areas. Walls and base slabs for the Target Station installation tunnels also continue to make steady progress.
View over the dog-leg ramp of the Accelerator tunnel and the piling works in the Target Staton area. PHOTO: ESS
Completed Accelerator tunnel stubs at their interface with the Gallery Building retaining wall. PHOTO: ESS
The Cryo-Compressor Building under construction. PHOTO: ESS
Week 2 — 11 January 2016
Excavation of the first ESS laboratory building (E04) began this week at the site of Laboratory 3B, to be located in Experimental Hall 3. Construction of the steel frame and precast concrete elements for both the Cryo-Compressor Building (G04) and the Central Utility Building (H01) has advanced, and the first two sections of the Gallery Building (G02) are undergoing facade and roofing work. Fourteen of the 30 concrete Stubs, which serve as the interface between the Gallery Building and the Accelerator tunnel, have now been completed. The vault for the Accelerator tunnel is now cast through section E21. Extension of the large retaining wall along the north side of the tunnel continues to follow in the tunnel’s wake as does the gradual backfill along the sides of the tunnel. The extensive foundation and tunnel works for the Target Station area are progressing steadily.
Facade and roofing works on the Gallery Building. PHOTO: ESS
The Accelerator tunnel dog-leg approach to the Target Station. PHOTO: ESS
Steel structure and prefab concrete walls for the Cryo-Compressor Building. PHOTO: ESS
Orthographic Photo — 6 January 2016
A composite flight-scanning photo created by the site's surveying team. Click to see the full-size image (31 MB).
Week 1 — 4 January 2016
Work on the ESS construction site resumed this week with ice, snow and low temperatures. At this time last year, the first walls of the Accelerator tunnel were being prepared for casting, work had not yet begun on any of the permanent buildings, and excavation of the Target Station area was still a month away. Construction of the tunnel is now less than 50 meters from the Front End Building, several permanent buildings are in progress, with some now as far along as HVAC and facade work, and the complex piling of the Target Station is well advanced. The number of site workers has increased from around 40 to more than 200.
Below are two aerial photographs of the ESS construction site separated by one year's time. The first photograph is from December 2014, and the second from December 2015. Click each photograph to enlarge.
The European Spallation Source site, December 2014. PHOTO: Perry Nordeng
The European Spallation Source site, December 2015. PHOTO: Perry Nordeng
Week 51 — 14 December 2015
The final aerial photographs of the site from 2015, taken on 15 December. Click each one to see it in high-resolution.
The Target Station and Experimental Hall areas. Large-diameter bored piles are being installed at the center area to support the Target Monolith. PHOTO: Perry Nordeng
The completed sections of the Accelerator tunnel flanked by the Gallery Building (above) and the HEBT Loading Bay (below). PHOTO: Perry Nordeng
Overview of the area within Circular Road. Excavation and piling for the Experimental Halls can be seen in the foreground above the drainage ponds. PHOTO: Perry Nordeng
The Accelerator tunnel emergency exit (bottom left) and the HEBT Loading Bay (top right) in progress. PHOTO: Perry Nordeng
Site Plan: Overview, Building Numbers
rev. G: 26-Aug-2015
Accelerator Tunnel Progress
Please click the image for a high-resolution photo.
17 February 2016
18 January 2016
15 December 2015
20 November 2015
27 October 2015
18 September 2015
18 August 2015
2 July 2015
5 June 2015
5 May 2015
10 April 2015
9 March 2015
5 February 2015
3 December 2014
28 October 2014
18 September 2014
21 August 2014
22 July 2014
Early 2013 satellite image
AERIAL PHOTOS: Perry Nordeng
On-Site Weekly Updates
Below you will find week-by-week updates issued from the ESS construction site.