{"id":33848,"date":"2026-04-07T16:58:45","date_gmt":"2026-04-07T14:58:45","guid":{"rendered":"https:\/\/www.soletanche.pl\/?post_type=avada_portfolio&p=33848"},"modified":"2026-04-09T13:46:01","modified_gmt":"2026-04-09T11:46:01","slug":"33848","status":"publish","type":"avada_portfolio","link":"https:\/\/www.soletanche.pl\/en\/offer-portfolio\/33848\/","title":{"rendered":"Museum of the Second World War, Gda\u0144sk"},"content":{"rendered":"

Project description<\/p><\/h2><\/div>

Construction of the Museum of the Second World War in Gda\u0144sk began in September 2012 and was completed in January 2017. The total floor area of this eight-storey building is 58,000 m\u00b2, with a usable area of 23,000 m\u00b2. The architectural design was created by Studio Architektoniczne Kwadrat, and Hochtief Polska and Warbud were the general contractors. The museum is located near other buildings: Brabank II Apartments (114 m away), Rycerska 10 (147 m away), and Hotel Grand Cru (181 m away).<\/p>\n<\/div>

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Scope of works \u2013 Soletanche Poland<\/p><\/h3><\/div>

In 2008, the decision was made to establish the Museum of the Second World War in Gda\u0144sk. Soletanche Poland executed one of the most spectacular and challenging projects in the company\u2019s history since 1996. The triangular-shaped museum building is bordered on one side by the Radunia River Canal and its tributary to the Mot\u0142awa River, on another side by Stara Stocznia Street, and by a pedestrian route along the canal leading to Sukiennicza Street. The project required an excavation up to 25 m deep, placing the main halls below ground level.<\/p>\n<\/div>

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These conditions – high groundwater levels (the Mot\u0142awa River flows directly adjacent to the construction site) and a limited work area\u2014made conventional excavation and further construction impossible.<\/p>\n

Our task was to create a structure that would allow an excavation with vertical walls and a dry base, enabling safe continuation of work without the risk of flooding from the Mot\u0142awa. It should be noted that soil layers near rivers are saturated with groundwater, so any excavation without proper protection would result in failures or catastrophic collapses.<\/p>\n<\/div>

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Project location:<\/p>\n

Gda\u0144sk, Poland<\/span><\/b><\/p>\n<\/div>

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Investor:<\/span><\/p>\n

Ministerstwo Kultury i Dziedzictwa Narodowego<\/span><\/b><\/p>\n<\/div>

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General Contractor:<\/span><\/p>\n

Hochtief Polska, Warbud<\/span><\/b><\/p>\n<\/div>

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Total building area:<\/p>\n

58 000 m\u00b2<\/span><\/b><\/p>\n<\/div>

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Volume:<\/p>\n

259 035,00 m3<\/sup><\/span><\/b><\/p>\n<\/div>

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Architectural height:<\/p>\n

25 m<\/span><\/b><\/p>\n<\/div>

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Number of above-ground floors:<\/p>\n

8<\/span><\/b><\/p>\n<\/div>

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Number of underground floors:<\/p>\n

6<\/span><\/b><\/p>\n<\/div>

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Our experience, both in design and execution, allowed us to develop a plan for securing the walls and dewatering the excavation base. We had previously completed numerous projects using diaphragm walls as support for large-scale excavations, as well as anchoring watertight foundation slabs. However, the Museum of the Second World War project was so complex, with a significant portion carried out underwater, that we invited other specialized companies to collaborate, including those experienced in underwater concreting, micropile installation, and dredging and dewatering.<\/p>\n

In August 2012, we began work with the goal of constructing a watertight box over 20 m deep and covering an area of more than 14,000 m\u00b2.<\/p>\n<\/div>

First, we constructed the excavation enclosure using CWS diaphragm wall technology, with a perimeter of over 500 m and an area exceeding 12,000 m\u00b2. The diaphragm wall retained groundwater outside the excavation, and anchoring it with over 310 ground anchors ensured stability after soil removal.<\/p>\n

This secured the excavation against water inflow from the sides. The second phase involved creating a watertight base. For this, we carried out an underwater excavation and, using floating platforms, installed over 900 micropiles, whose positions in the slab were supervised by divers. The micropiles were necessary to prevent hydrostatic pressure from displacing the base slab and to allow construction of the internal structure.<\/p>\n<\/div>

The next element ensuring a watertight base was the so-called underwater concrete plug\u201425,000 m\u00b3 of concrete poured over 20 m below water in a continuous process, 7 days a week, 24 hours a day. Placed between the micropiles and connected to the diaphragm wall, this plug completed the watertight box structure, allowing water to be pumped out of the excavation and enabling construction work to proceed safely.<\/p>\n

Soletanche Poland\u2019s solution for the Museum of the Second World War was a key element of this modern project, both culturally and engineering-wise. Leveraging our experience in the Polish market, we overcame complex challenges, achieving success and paving the way for future ambitious projects in Poland.<\/p>\n<\/div>

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diaphragm wall thickness<\/div><\/div><\/div>
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construction perimeter<\/div><\/div><\/div>
0<\/span> pcs.<\/span><\/div>
ground anchors<\/div><\/div><\/div>
0<\/span> pcs.<\/span><\/div>
micropiles<\/div><\/div><\/div>
0<\/span> m\u00b2<\/span><\/div>
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Discover Soletanche Poland\u2019s offer<\/h3><\/div>

Explore the comprehensive offer of Soletanche Poland: markets, services, and foundation technologies for construction, infrastructure, industry, and environmental protection. It includes the full range of competencies required to deliver demanding geotechnical and foundation projects. Our approach enables flexible adjustment of the scope of works to the scale, nature, and specific conditions of each investment.<\/p>\n<\/div>

<\/i>Learn more<\/span><\/a><\/div><\/div><\/div><\/div><\/div>

Related technologies<\/p><\/h2><\/div>

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Diaphragm Wall<\/strong><\/p>\n<\/div><\/h3><\/div>

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Diaphragm walls are reinforced concrete structures built in the ground, used as vertical supports for deep excavations.<\/p>\n<\/div>\n

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Micropiles<\/strong><\/p>\n<\/div><\/h3><\/div>

Micropiles are piles up to 300 mm in diameter, used to transfer structural loads through skin friction in the ground.<\/p>\n<\/div>

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Ground anchors<\/strong><\/h3><\/div>

Widely used method to ensure stability of deep excavation walls under various soil conditions.<\/p>\n<\/div>

<\/i>Learn more<\/span><\/a><\/div>
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Contact Soletanche Poland experts to receive comprehensive support \u2013 from consultancy to project execution.<\/p>\n<\/div>

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Your project
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Contact Soletanche Poland experts to receive comprehensive support \u2013 from consultancy to project execution.<\/p>\n<\/div>

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