Construction of the interceptor in Dresden's old town centre. Linear Shoring: Making progress with large clearance
Jun 12, 2006
Sewer construction work in Käthe-Kollwitz-Ufer (road along the river bank) in Dresden got underway in September 2005. On behalf of Stadtentwässerung Dresden GmbH (the city sewers authority), the interceptor in the old town centre is being replaced from the stormwater tank in Johannstrasse to Bundschuhstrasse. A joint venture between Heinrich Lauber GmbH & Co. KG (technical management) and Braumann Spezialtiefbau GmbH (commercial management) is executing the first stage of the project in the Elbe meadows.
Unlike sheet piling, the shoring is not installed in its entirety in advance, but is inserted during ongoing excavation as work progresses. Four to ten modules of the shoring system – for these depths consisting of inner and outer base and top panels, Linear Shoring soldiers and roller units – are being employed on this project for a continuous length of up to 38 m.
According to everyone involved, the installation and extraction of the elements is proceeding just as smoothly as the insertion of the 3 m long reinforced concrete pipes with the Dresden cross section.
The non-standard cross section measuring DN 1982/2200 is distinguished not only by its flat base, but also by the fact that its cross section precisely matches the dimensions of the sewer cleaning vehicle that is constantly in operation keeping sewers clean in Saxony’s capital.
"Cleaning is based on a simple principle," explains project manager Dipl.-Ing. Heiko Nytsch, Stadtentwässerung Dresden GmbH. "The cleaning vehicle pushes a shield ahead of it which is kept slightly above the floor of the pipe but otherwise rests against the walls of the pipe." If the cleaning vehicle is held up by congestion on the floor of the sewer, the water jet escaping through the gap washes the obstacle out of the way. "After this, the vehicle propelled solely by the flow of sewage can continue its journey," Nytsch adds.
According to project manager Dipl.-Ing. (FH) Volker Preuss of Heinrich Lauber GmbH & Co. KG, a tightly meshed network of wells will lower the water table sufficiently. "The water table remains within the natural lower range and the trench is kept dry around the clock," Preuss explains.
After the pouring of the roughly 27 cm thick concrete slab to support the pipe, a mobile crane lifts the 16 t pipes into the trench. "Rapid progress overall is ensured by the size of module and by the fact that the position of the rigid roller units can be modified at certain stages of construction," explains Dipl.-Ing. Fritjof Heiland, consultant for Emunds+Staudinger GmbH. This is possible as soon as the concrete bed has achieved its minimum strength.
"In this situation, the excavator can raise the roller unit into the highest position that maintains the required structural strength," Heiland adds. In this way, sufficient space is created for the next tasks. When the reinforced concrete pipes are lowered in the trench, they can be shifted smoothly under the roller unit and joined together.
Thomas Martin Kommunikation
Tel.: +49 (0) 202/69 574 995
Fax: +49 (0) 202/69 574 998
More News and Articles
May 30, 2023
Trenchless contractor puts maintenance hole relining system through its paces
Civil and trenchless specialists M Tucker & Sons showcases its expertise through a UV lining project.
May 26, 2023
City of Toronto launches tunnel boring machine for stormwater tunnel and largest basement flooding prevention project
Today, the City of Toronto marked a major milestone for the Fairbank Silverthorn Storm Trunk Sewer System project, launching a tunnel boring machine that will work to construct a new storm sewer that will collect, store and move stormwater from …
May 24, 2023
Global Water and Wastewater Utilities Take Aim at Climate Change
New Survey of 100 Utilities Tracks Net-Zero Progress: 75% of Respondents to Reduce Greenhouse Gas Emissions by 2040
May 22, 2023
Regional San’s monumental wastewater treatment plant expansion project delivered ON schedule and UNDER budget
The EchoWater Project, one of the largest public works projects in the Sacramento region’s history, takes wastewater treatment to a whole new level
May 19, 2023
Haliotis 2: Wastewater recovery and treatment complex
In April the future, next-generation wastewater recovery and treatment complex for the Métropole Nice Côte d’Azur “Haliotis 2” was presented. Christian Estrosi, Mayor of Nice, President of the Métropole Nice Côte d’Azur and Deputy President of the Région Provence-Alpes-Côte d’Azur …
May 17, 2023
Wrapping up the challenges in SA
In December 2022, Denso Australia completed the supply of a project involving the protection of 400 lineal metres of DN250 mild steel pipeline in Bolivar, South Australia.
May 15, 2023
New South Wales university receives network upgrade using SAERTEX-LINER® MULTI Type S+
Australian Pipeline Management (APM) has successfully relined three separate pipelines running under a university in Sydney with UV cured-in-place technology from SAERTEX multiCom® GmbH.
May 12, 2023
IMPREG continues to invest in Australian and NZ market
With increasing demand of IMPREG’s unique UV pipe solution, the German company continues to invest in the Australian and New Zealand market.
May 10, 2023
Yonge Street Project Combines Trenchless Rehab and New Install Practices
In the fall 2020, the Regional Municipality of York initiated a project to rehabilitate a 127 m long concrete box culvert under Yonge Street. The Region retained Jacobs Engineering to provide design and construction support services.
May 08, 2023
Climate adaption solutions for the water sector in the German-Danish border area
More than 60 participants met in Kolding, Denmark, from March 23 to 24 for the final conference of the INTERREG-Project NEPTUN. In the frame of this project, more than 40 partners elaborated 15 specific climate adaption solutions for the water …
May 05, 2023
Primus Line® flies the flag for trenchless solutions in sensitive locations
Primus Line has illustrated the benefits of trenchless technology for pipeline rehabilitation in culturally sensitive areas during two installations for one of the world’s leading mining companies.
May 03, 2023
Optimising chemical dosing in a challenging operating climate
Rising operating costs and tightening regulations are presenting major challenges for wastewater treatment plant operators, but better optimisation of chemical dosing can drive efficiencies, says Adeel Hassan, product manager at Watson-Marlow Fluid Technology Solutions.
41836 Hückelhoven - Baal
+49 (0) 24 33 / 453-0
+49 (0) 24 33 / 453-100