1

AESTHETIC SHELL FOR REGENERATIVE ENERGY

The almost 100 meter long sculptural shell conjures

up numerous associations: from whales or waves

through to polished boulders. The power plant

replaces a building from the 1950s and currently

supplies around 4,000 households with a capacity

of around 14 gigawatt hours per year.

In a competition, the building client, Allgäuer Über-

landwerk (AÜW) Kempten, requested a building

design to harmonize with the protected group of

buildings opposite, comprising the former Rosenau

spinning works and weaving works. The result is a

multiple award-winning structure: It won the Ger-

man Architecture Prize 2011, the German Concrete

Architecture Prize 2010, the German Industrial

Building Prize 2010 and made it into the final selec-

tion for the International Liechtenstein Prize for

Sustainable Construction in the Alps 2010.

The concept devised by the Becker Architekten

architecture office planned to link up the two end

points - the power house (with generators and

Keselstraße hydroelectric

power station, Kempten

Allplan Engineering in practice

The new run-of-the-river power plant on the Iller river at Kempten impresses the viewer with its

dynamic, elegant form.

2

EinlaufOberwasser

AuslaufUnterwasser

Tor

4,38

40

0607

01

02

03

04

05

1112

13

14

15

16

21

17

19

180810 09

2524

2322

21

20

Auflagerlasten siehestatische Berechnung

1

4

5

7

8

Fuge

Fuge

15

16

17

18

25.1

27

29

30

31

32

Abschnitt V1; Pos. D5.1Abschnitt IV; Pos. D4

Abschnitt II; Pos. D2

Abschnitt I; Pos. D1

Abschnitt III; Pos. D3

Abschnitt V2; Pos. D5.2

Abschnitt VI; Pos. D6

Positionsplan Dachkonstruktion M=1:100

28

26

25.2

25.423

22.2

21.2

22.121.1 20

19

13

12

Fuge

1114

9

6

2

0

10

3.23.1

25.3

24

Fuge

Fuge

Detail LagerausbildungPosition

4, 7, 12, 16, 19, 20, 21.1, 21.2, 23, 24, 26, 29, 30, 31 und 32M=1:10

Detail LagerausbildungPosition 28M=1:10

Detail LagerausbildungPosition

0, 6, 9, 11, 14 und 17M=1:10

Konstruktionsgruppe Bauen Kempten AG Ingenieurbüro für Bauwesen

Bauherr:

Tragwerksplanung:

Bauvorhaben:

Plandarstellung:

Datum

Maßstab:

bea.: gez.: gepr.: Plangröße: Plan Nr.:

Proj. Nr.:Senger

1:100Möller Möller 1,00m²

07­601

Allgäuer ÜberlandwerkGmbH KemptenIllerstraße 1887435 Kempten

Prüfingenieur:

Planung Hochbau:

Planung Tiefbau:

Becker ArchitektenArchitekturbüroBeethofenstraße 787435 KemptenTel.: 0831/512200­0Fax.: 0831/512200­1

RMD Consult GmbHWasserbau und EnergieBlutenbergstraße 2080636 MünchenTel.: 089/99222402Fax.: 089/99222409

Neubau Iller­KraftwerkAÜW Keselstraße

Positionsplan Dachkonstruktion Wasserkraftwerk

05.07.07

Zu diesem Plan gehörende Pläne:

Plan Nr.

Index Datum

Datum Prüf.­Ing.

gez. gepr. Änderung

Bauherr Architekt Baufirma

a

b

c

d

e

Werkpläne des Architekten

P1001

Pos. Plan :

Legende

21.01.2008 Senger 10 und 13 Festpunkte

14.11.07 3x

3xP1001a 21.01.08 1V (PDF) 1V (PDF) 1V (PDF)

LGA KemptenLandesgewerbeanstalt Bayern Zweigstelle KemptenStiftsplatz 187439 KemptenTel.: 0831/ 52148­0Fax.: 0831/52148­20

Senger04.08.2008

Bahnhofplatz 1 87435 Kempten Tel. 0831­ 52156­0 Fax 52156­60

an neue Geometrie des Architekten angepasst

3x 1V (PDF) 1V (PDF) 1V (PDF)P1001b 06.08.08

RMD­Consult

1V (PDF)

1V (PDF)

Senger08.10.2008 Vom Prüfer freigegeben (ohne Eintrag)

P1001c 08.10.08 1xPDF 1xPDF 3x + 1xPDF 1x + 1xPDF

P1001c

H/B = 841.0 / 1189.0 (1.00m²) Allplan 2006

transformer) and the flow restrictor weir (with

trash rack cleaning system) via a continuous

building shell. Approximately half-way along, this

shell passes through the historic steel trussed arch

of the cable bridge. Despite the overall size, the

architects wanted to create a highly differentiated,

organic form that on the one hand blends in with

its environment, but on the other is perceived as an

independent building thanks to its design.

When the structural engineers from Konstrukti-

onsgruppe Bauen AG, Kempten became involved

in the project, a decision had not yet been made

regarding the materials. Ultimately, a concrete

structure was chosen to enable the organic form

enclosing the plant to be realized. The civil enginee-

rs first used hand drawings to help determine the

points at which the structure can be supported

by the existing technical installations. The shell

was divided into six sections, first to provide the

expansion joints required by the thermal conditions

and second because the roof supports needed to

be permanently fixed at some points, and movable

at others.

In the next step, the engineers developed a rib

structure for the concrete construction. It had to fit

in with the overall image, but it was also necessary

to be able to split it into six segments. Models of the

concrete shell were then created with a high level

of geometric detail in Allplan Engineering to serve

as the basis for reinforcement and shell design. The

result is a monolithic concrete roof structure of fre-

ely curved rib arches, curved walls and arched roof

surfaces. The large free span of the rib arches is

9.3 meters, the concrete areas are between 20 and

25 centimeters thick.

The hydroelectric power plant on the Iller is a buil-

ding that aesthetically enriches its environment,

rather than detracting from it. Among other things,

it therefore plays a role in generating support for

electricity supplied via regenerative energy. The

Iller power station is part of the “hydropower world“

accessible to the public via an unbroken foot and

cycle path along the river. This path runs directly

between the old spinning works and the new power

station and passes the impressive, high interiors

with their concrete ribs. It‘s a view that makes you

feel as though you are inside a modern cathedral.

PROJECT INFORMATION OVERVIEW

> Building typology: Hydroelectric power station

> Software used: Allplan Engineering

PROJECT DATA

> Structural engineering design:

Konstruktionsgruppe Bauen AG, Kempten

> Earthworks structural design: RMD Consult,

Munich

> Architecture: Becker Architekten, Kempten

> Client: Allgäuer Überlandwerk AÜW Kempten

> Construction start date: November 2007

> Completion: July 2010

> Cubature: 3,865 m³

> Usable area: 590 m²

3

Konstruktionsgruppe Bauen AG, Kempten covers

the whole range of project planning from bridge

construction and civil engineering, structural design

and structural inspection through to building

management for both new constructions and

building in the existing assets. Expert opinions and

building inspections in bridge construction and

structural engineering round out the services

offered by Konstruktionsgruppe Bauen AG.

In the area of structural design for structural

engineering and industrial construction, Konstruk-

tionsgruppe Bauen deals with all questions relating

to structural analysis, construction and building

management with the aim of creating economically

feasible solutions with a high planning quality.

“The organically shaped shell of the

hydroelectric power plant was created

with a very high level of detail with

Allplan Engineering and provided the

optimum basis for shell and reinforce-

ment plans.“

Andreas Möller

Konstruktionsgruppe Bauen

ALLPLAN is a leading European vendor of open

Building Information Modeling (BIM) solutions. For

over 50 years, the company has been supporting

the construction industry with its pioneering

software portfolio, and has been decisively driving

the digitalization of the construction industry

forward: innovative, tailored to the clients’ needs –

and with the best “Made in Germany” quality.

ABOUT THE COMPANY

© 2018 Allplan GmbH, Munich, Germany; © Title and plan back page: Konstruktionsgruppe Bauen AG, photo: Eva Bartussek; photo back page: Brigida González

ALLPLAN UK Ltd

5 Charter Point Way

Ashby Park

Ashby de la Zouch

LE651NF

Tel:+44 01530 560126

sales.uk@allplan.com

allplan.com