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Timothy Coss | Microtunneling, Inc.
Tim Taylor | FV Coluccio
Mike Ellis | Trenchless Equipment Co.
The presentation will cover the different pipe types used in microtunneling, pipe strengths and weaknesses, and suitable applications that the various microtunneling pipes can be used for.
The presentation will outline a project and how the choice of construction by Microtunneling was made versus HDD and Direct Pipe. With the limitations of various methods of new construction trenchless technology changing the choice of which method is best for a project is not as clear cut as it used to be. This presentation helps provide the thought processes involved in making these decisions.
Altamira Sea Outfall pipejacking drive with a length of 7,360 ft an outside diameter of 10.5 ft is the longest pipe jacking drive with the TBM rescue under the Sea Bed executed and the second longest pipe jacking drive ever since the Europipe pipe jacking drive in 1996.
The purpose of the tunnel is the installation of the gas pipeline outfall in the project Gaspipeline Sur de Texas Tuxpan.
We will show the jobsite preparation, equipment used, installation phase and main issues occurred during the execution of the tunnel, problems suffered, and how we had solved them in order to finalize a very difficult pipe jacking drive with an hydroshield machine in plastic clay and sand, the rescue of the TBM under the sea bed and installation of the gas pipeline bundle inside the tunnel.
Levent Ozdemir | Tunneling Consultant
Automatic Motorized Total Station (AMTS) has been used for ground settlement, structural deformation monitoring in tunnel construction since 1990s. Compared to conventional manual survey, it provides continuous, near-real time measurements with minimal operator presence and maintenance on site after initial setup. AMTS is primarily known to operate in reflector mode, which requires installing optical prisms at monitoring points while being less known, it also operates in reflectorless mode measuring directly an object’s surface deformation with appropriate reflectivity. Such features make reflectorless AMTS an ideal technique for settlement monitoring when tunneling beneath major traffic roads, because it eliminates the interference to the traffic while providing timely monitoring data. This presentation introduces the principles of AMTS reflectorless system, with case studies of implementations of such system in some microtunneling projects in Southern California. With no traffic closure needed while allows for instant access to tunneling induced settlement data, it is proven to be an effective and practical tool to meet engineer’s requirement of neal-real time settlement monitoring as well as provide contractor with a cost effective, fast-mobilization solution.
Mr. Rosenberg will provide an update on key legal issues in 2019 for underground contractors. He will address contract issues and cases that all underground contractors need to be aware of as well as the ever shifting risk allocations imposed on contractors.
The presentation will cover the following:
- Microtunneling and PipeJacking: trends and innovations
- Direct Pipe® Technology: as alternative to HDD in highly permeable soil conditions
- Pipe Express® :a semi trenchless pipeline installation method as alternative to open cut in restricted areas.
- E-PowerPipe®: latest development for long distance cable installations (e.g. power transmission lines from the wind parks in the North Sea across Germany)
- The new Downhole Jetpump Technology: ideal for long distance slurry microtunneling
- New Mechanized Cross Passage construction technology: Pilote Project in Hongkong
- Small diameter Segment Liner Technology (<4,8m)
- Multimode and multi-liner systems: maximum flexibility in tunneling
- Vertical Shaft Sinking technology: ideal for small footprints, settlement sensitive areas, deep shafts, no groundwater lowering required
The jacking pipe is the main bearing structure on a microtunnel / pipe jack during construction and in case of a direct jacked pipe also during service life of the tunnel. This presentation sums up several important design and execution aspect of a reinforced concrete jacking pipe used for a microtunneled siphon with tight curve radius in the State of Oregon, US.
This presentation will cover proper selection of separation equipment to keep up with the production of solids generated by the new and highly sophisticated TBM’s available on the market.
Direct Pipe Through Hard Rock will cover the challenges and learning experiences of the highly technical Direct Pipe® Installation (DPI) on the Severn River in Ontario, Canada. The crossing was a key component of TransCanada’s Gravenhurst Pipeline Replacement Project, a 1.6km NPS36 replacement line.
Bradshaw Construction is in the process of completing nearly 3,000′ LF of tunnel for the Goff Brook Overflow Closure project, a sanitary sewer installation in Wethersfield, Connecticut. The project has provided unique challenges and opportunities to advance the interests of both our organization and the client. Rock microtunneling always requires different considerations and usually offers lessons to be learned, and this project has been no exception. Additionally, the project has allowed for client-contractor collaboration to modify the original scope, which has included adding a 510′ LF drive on an 1,170′ radius curve in lieu of open cutting a major highway.
In December 2017, Laney set a new world-record in length for the Direct Pipe® Method. This project included a shore approach execution into the Gulf of Mexico located in Cameron County, Texas. The total measured distance of the 42-inch diameter Direct Pipe® installation was 4,900 feet with an additional 1,350 feet of pipe pushed out to the offshore contractor. This was the longest Direct Pipe® installation at the time on construction worldwide. This presentation will discuss the project methodologies adopted by both the design and construction teams to successfully install the pipeline crossing. In addition, the case study will discuss the numerous challenges associated with installing a pipeline further than had ever been accomplished utilizing the Direct Pipe® Method.
Global Long Drive Experience will cover some key projects of the Bothar Group of Companies, including sea-outfall tunnelling and unique long distance (1km+) projects.
Steve Leius, SECA Underground Corporation
Brenden Tippets, Michels Corporation
Gerhard Lang, Herrenknecht AG
Rich Palmer, Northeast Remsco Construction