Construction of the Diak Hospital: Systems stabilize Deep Excavation

In 2014, the Diakonie Hospital (Diak) in Schwaebisch Hall, Germany cared for a total of 24,836 in patients and 45.971 out patients. With 1,398 employees, the clinic is the town’s second largest employer.

Currently, the first section of a comprehensive rehabilitation of the hospital is being carried out. In this section, a compact, cubical-shaped building with approximately 300 beds is being built. Additionally, several specialized departments, the kitchen and the pharmacy, will move into the 8 level building that will include a floor space of approx. 12,300m². In the second section, another, 10.800m² area will be built for additional medical departments. In total, a new hospital with approx. 500 beds will be created in two sections.

In the first section, a total of 85,000m³ of earth is moved on an area of roughly 10,000m². A slope located in close proximity to the jobsite had to be stabilized by retaining walls in several sections from top to bottom. For this purpose, an approx. 2,000m² large shotcrete wall stabilized by soil nails was built up to a height of 15m. To stabilize this area, DSI supplied a total of 4,000m of DYWIDAG GEWI® Steel Soil Nails.

In the second section, the excavation was dug up to a depth of 40m – a depth that was required by the hillside location – and an anchored bored-pile wall with more than 70 piles in lengths of approx. 23m was constructed. Once the bored-pile wall had been completed, the earth was removed from the excavation.

In order to prevent the piles from buckling during the excavation work, each pile had to be tied back into the slope by up to 6 permanent DYWIDAG Strand Anchors. The DYWIDAG Strand Anchors reach up to 27m deep into the stable slope strata and were installed up to a height of 14m. In total, DSI supplied 7,000m of 5 strand permanent anchors in lengths of up to 28m to stabilize the excavation.


Diakonie-Klinikum Schwaebisch Hall gGmbH, Germany