Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Microtunneling and Trenchless Value-Engineering Challenges and Experiments in Turlock, California
In 2020, the city of Turlock, California, constructed 7.5 mi of 42-in.-diameter, low-pressure, recycled water, steel pipeline. The design included three 54-in. microtunnel drives below two environmentally sensitive drainages and one culvert. Attempts at stabilization of the launch portal for the first tunnel with grouting were not satisfactory until dewatering wells were added adjacent to the portal. The portals for the second tunnel were stabilized using a guillotine-type (double wall) system. Despite tunneling through unanticipated woody material (buried tree-trunks), the second tunnel was completed successfully. The project included a value-engineering option of mutually shared cost savings from contractor ideas accepted by the city. Through value engineering, the third microtunnel was eliminated, and instead the pipeline casing was installed with pipe jacking through extensively dewatered sandy soil with an excavator bucket. This paper summarizes microtunneling challenges, remedies and value engineering, and related recommendations for future projects.
Microtunneling and Trenchless Value-Engineering Challenges and Experiments in Turlock, California
In 2020, the city of Turlock, California, constructed 7.5 mi of 42-in.-diameter, low-pressure, recycled water, steel pipeline. The design included three 54-in. microtunnel drives below two environmentally sensitive drainages and one culvert. Attempts at stabilization of the launch portal for the first tunnel with grouting were not satisfactory until dewatering wells were added adjacent to the portal. The portals for the second tunnel were stabilized using a guillotine-type (double wall) system. Despite tunneling through unanticipated woody material (buried tree-trunks), the second tunnel was completed successfully. The project included a value-engineering option of mutually shared cost savings from contractor ideas accepted by the city. Through value engineering, the third microtunnel was eliminated, and instead the pipeline casing was installed with pipe jacking through extensively dewatered sandy soil with an excavator bucket. This paper summarizes microtunneling challenges, remedies and value engineering, and related recommendations for future projects.
Microtunneling and Trenchless Value-Engineering Challenges and Experiments in Turlock, California
Marshall, Jonathon P. (Autor:in) / Nielson, Dru R. (Autor:in)
Pipelines 2022 ; 2022 ; Indianapolis, Indiana
Pipelines 2022 ; 147-156
28.07.2022
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Underground : magazine for trenchless construction and microtunneling
TIBKAT | Nr. 1.1886 - 26.1992; 29.1992 - 35.1993; damit Ersch. eingest.
Pipe Selection Criteria for Trenchless Projects: Microtunneling to Large Tunnels
| British Library Conference Proceedings | 2007
| British Library Conference Proceedings | 1993