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    Quality and safety in construction
    is priority at LEONHARD WEISS
    General contractor network construction

S21 Bad Cannstatt

For Germany's Digital Rail

Customer: DB Projekt Stuttgart – Ulm GmbH
Construction period: 50 months Year of construction: 2021–2025
Yellow construction site with Gleisbau Göppingen (Track Construction Göppingen)
Execution of underground cable works requiring 80 cable crossings, 15,000 m of cable duct and 76 signal foundations
Foundation of 16 signal brackets by means of drilled piles with a diameter of 88 cm and up to 22 m of length with railway foundation construction train, which received a special permit for this construction project


speeding up of the project by the customer: a total of 11 weeks shutdown from May to July 2023.
Assignment of up to 50 workers and 5 road-rail excavators around the clock.

S21 KTB Fildern

Customer: DB Projekt Stuttgart-Ulm GmbH
Construction period: 28 months Year of construction: 2021–2024
Laying of cables for control, communication, and safety system/telecommunication: approx. 700 km
Cable duct system concrete and concrete building for control and switch facilities approx. 23.8 km
Cable assembly chutes size IV-X: approx. 85 pcs.
Crossings: 104 pcs.
In connection with the Digitaler Knoten (digital point of intersection) Stuttgart the railway intersection Stuttgart is to be controlled by means of digital control centres. For this reason, the control centre from Vaihingen to Böblingen and Flughafen Stuttgart is renovated. Foundation of a building for control and switch facilities and adaptation of the control centre Vaihingen and their surroundings, installation of approx. 23,800 m concrete and glass fibre reinforced plastic cable ducts, as well as approx. 85 track crossings were carried out. Laying of a total of approx. 700,000 m of cables.


Installation of a steel auxiliary bridge over 20 m
Installation of a steel tube crossing with a dimension of DN 800 in rocky ground
Installation of 5,000 m side path stabilisation

High speed project Digital Control Station Zwieseler Spinne

Pure nature and digitalisation of railway in the region Bayerischer Wald

Customer: PINTSCH GmbH
Construction period: 14 months Year of construction: 2022–2023
In addition to the traditional underground cable works and signal foundations for the new control centre we have been awarded the contract for the simultaneous construction of railway and road, as well as for the landscape management. In connection with the project there will be further projects like the construction and foundation of five buildings for control and switchgear facilities and two hot box detection facilities. The challenges are the particularities of the pilot project, the planning legwork, the rocky ground, and the sensitive switch gear technology still in operation.
Further challenges are logistics, access ways and the delivery of material to the very remote, one-track railway line, as well as the requirements of environmental protection and species conservation.
New construction cable duct: 28,000 m
Production of crossings: 850 m
Installation of cable-assembly chutes: 160 pcs.
Signal foundations (partly on rocky ground): 99 pcs.
Ramming of stabilisation of cable duct with ballast supporting slabs: 3,600 m
Laying of cables: 288,000 m
Underground cable works with hot box detection facilities: 2 pcs.
Conversion of level crossings: 9 pcs.
Outside facilities and foundation of buildings for control and switch facilities: 4 pcs.
Outside facilities and foundation of buildings for control and switch facilities and operating buildings operated by traffic controllers: 1 pc.

Cable civil engineering Untertürkheim

Digital technology step by step

Customer: DB PSU GmbH
Construction period: 48 months Year of construction: 2022–2025
Cable civil engineering, draw-in of cables, foundation and production of track field concentrators, new construction, conversion, and dismantling of signal brackets
In connection with the project Digitaler Knoten Stuttgart, we were awarded the contract for creating the basis required for controlling the railway junction Stuttgart by means of digital control centres. Foundation of four track field concentrators and their surroundings, installation of approx. 16,000 m concrete cable duct, as well as approx. 70 pcs. track crossings. New construction of a total of four signal brackets, as well as the conversion and dismantling of one signal bracket respectively. Laying of a total of approx. 400,000 m cables. Foundation of 190 signals on nine different railway lines.

Electronic control centre Riedbahn (ESTW RBN)

120 km new cable routes and 500 new signals between Frankfurt and Mannheim

Customer: DB Netz AG
Construction period: 38 months Year of construction: 2022–2025
New construction of a total of seven electronic control centres type A and three electronic control centres type Z between Frankfurt/Main-Stadion and Mannheim-main train station with 33 km track renovation incl. 53 new points, approx. 120 km new concrete cable duct with approx. 25 km ballast supports and 2,500 m track crossings, approx. 800 pcs. cable assembly chutes. After termination of the new cable conduit system approx. 700 km new cables are laid and approx. 1,200 km existing cables dismantled.

Besonderheiten im Projekt:

Digital documentation of the performances carried out by means of camera systems (AI programmes) and their evaluation by the customer.

Electronic control centre Osterburken

Railway infrastructure in Baden-Württemberg is being updated

Customer: DB Netz AG
Construction period: 24 months Year of construction: 2021–2022
During the complete shutdown from the end of July until the beginning of September about 6,500 m of new cable ducts of the sizes I to IIIa were installed for the new electronic control centre in Osterburken. For the production of cable conduit routes, a boundary path of 1,200 m had to be built in certain areas of railway embankments before the cable ducts could be installed. This boundary path is composed of ballast supporting slabs, which are stabilised by driven-in HEA steel beams. Along the two lines 4120 and 4900, 73 signal foundations were built for the new control, communication, and safety systems by means of driven casing pipes TECDOWN or by means of the monolithic construction method. In order to guarantee the new cable route, 43 track crossings in open construction method were built along the entire line. For building them the track system was opened and the empty conduits installed and concreted under the rails. At three neuralgic points concerning the sighting distance of the signals it was necessary to produce three new signal brackets. For the foundation of two signal brackets, two steel pipes with a diameter of 700 mm were driven in and a ridgepole with foundation basket was concreted. For the third signal bracket a complete sheet pile wall casing was driven in up until reaching a load-bearing soil layer and anchored to the ground by means of additional micro piles. In order to enable the technical equipment to communicate with each other, approximately 120,000 m cables were laid for the entire project.

ABS Hanau/Gelnhausen

ABS Hanau-Fulda – 1. Schritte zur 4-Gleisigkeit

Customer: DB Netz AG
Construction period: 36 months Year of construction: 2020–2023
Workforce: up to 40 employees, 8 road-rail excavators, rail carriage drill.
Preparation of execution planning
Underground cable engineering
Laying of cables for control, communication, and safety system/telecommunication/50Hz: approx. 400 km
Cable duct system concrete and glass fibre reinforced plastic approx. 39 km
Cable assembly chutes sizes IV-X: 150 pcs.
Signal foundations driven casing pipes: 68 pcs.
Track crossings 4-12 wheel-track adhesion control in concrete: 65 pcs. over 1 to 3 tracks
Track crossings steel tube DN 300-600 12 pcs. over 2 to 5 tracks
Foundation of signal brackets and signal bridges: 9 pcs.

Joint venture Taunusbahn

Renovation of control, communication, and safety system for the electrification of the Taunusbahn

Customer: Der Verkehrsverband Hochtaunus (VHT)
Construction period: 12 months Year of construction: 2021
35 employees, 5 road-rail excavators, 2 carriage drills, Colmar, 37 km from Friedrichsdorf to Brandoberndorf in the region Hochtaunus, 7 stations and 2 stop stations
Renovation of the 83 existing signals
Laying of cables for control, communication, and safety system/telecommunication: on the entire stretch approx. 145 km
14 km concrete cable ducts incl. ballast support plates
700 m plastic cable ducts
Concrete cable throughs in concrete and plastic
Cable assembly chutes and cable installation chutes
63 driven casing pipe foundations
7 monoliths in large construction type and 7 in smaller construction type
18 track crossings incl. connection to cable assembly chutes
7 new road crossings
6 new construction IECC-A-modules, incl. connection to cable assembly chutes

TANV Ansbach - Crailsheim

Customer: DB Netz AG, München
Construction period: 20 months Year of construction: 2020–2021
Renovation of the fibre optic cable connection between the station Ansbach (Bavaria) and the station Crailsheim (Baden-Württemberg) on a stretch of 49 km. Production of a new cable duct system with 13 km support construction during a challenging shutdown concept with continuous nightly shutdowns (37 consecutive weekends). 51 km laying of new fibre optic cable.