Articles
13.12.2005
The NORIS-Project and the Top-Cote-Liner
The NORIS project is an EU-project co-financed by the Interreg IIIB programme. The project should be a platform for exchange of knowledge on No-Dig techniques, source control methodologies and monitoring systems. Seven partners from five countries in the North Sea Region are involved in the project. The NORIS project has three environmental focuses: How to separate unwanted rain- and drain water from combined sewer pipes How to redirect rainwater to groundwater by natural processes How to minimise the risk of overflow and overload of sewers The focusing on separation of rainwater from sewage water is carried out with a new No-Dig technique. The new technique called Top-Cote, will be used in pilot projects in 2005 and 2006. The first pilot project should be completed in the village of Tidan close to Skövde in Sweden. The TopCote-technique combines pipeline rehabilitation and the separation in the same installation by using a 2-in-1 liner.
mehr06.12.2005
Interactive Software for Selection of Technologies for Installation and Replacement of Utilities
The decision of how to accomplish the installation or repair of a buried pipe in an urban environment involves tangible and intangible parameters. This paper outlines the development of comprehensive, yet straightforward and easy to use interactive software for the evaluation of alternative construction methods that can be employed in the installation, rehabilitation, or replacement of buried pipes and conduits. The software emphasizes simplicity and practicality, and limits input data to those readily available to utility engineers at the design stage of the project. Based on the specific characteristics of the problem(s) facing the decision-maker, the software performs a preliminary screening, eliminating technologies unlikely to meet the project’s requirements. A technical evaluation is then undertaken during which the technical capabilities of the various technologies identified in the first step are compared with the project’s attributes. Next, a risk analysis is performed based on the characteristics of the project's environment and the anticipated soil conditions. The model offers an interactive graphical user interface, and it is compiled as a standalone application compatible with common Microsoft operating systems platforms.
mehr29.11.2005
The Synergy Between Theory and Practice in Drilling Technology
GeoBrain is a facility at GeoDelft with the purpose to provide society with all relevant geo-engineering knowledge and experience in a structured way. On the basis of the available knowledge and experience engineers, decision makers and construction supervisors can come to a fast, reproducible and objective choice, taking into account the consequences. The paper presents an example from the GeoBrain experience databases and forecasting models developed for directional drilling, or: "GeoBrain Drilling".GeoBrain is closing the gap between theory and practice. It is aimed directly at reducing uncertainty and the costs of failure, thereby increasing the quality of profession and minimising the risk in geo-engineering works.
mehr23.11.2005
The DigiTrak Eclipse Locating System: A Flexible and Innovative Approach to Meeting Today's HDD Locating Challenges
During the recent downturn in the Horizontal Directional Drilling (HDD) market, equipment manufacturers focused on research and have introduced a number of innovations. Nowhere has this been more evident than amongst manufacturers of HDD locating systems. In particular, the documentation of an increasing number of parameters concerning the drilling process has been a focus of development. Additionally, the capability to successfully carry out a wide range of project specifications with the same locating system has been made a priority. This paper will describe the DigiTrak® Eclipse® locating system’s various features and will use short project summaries as examples. Particular emphasis will be placed on gravity sewer installations; project mapping and documentation; down hole drilling fluid pressure; load monitoring and documentation; and magnetic guidance system operations. It is the intent of the author to demonstrate the level to which modern locating systems have risen and to help educate project planners and owners about some of the various HDD projects successfully undertaken in recent years.
mehr24.10.2005
Municipalities require multi-billion Euro infrastructure investments.
The use of plastic materials for repair and replacement of sewer inspection chambers is rapidly increasing in popularity. The reason for utilising plastic materials in place of traditional concrete products is because modern plastics offer superior performance characteristics in typical sewer environments. Nearly one third of the existing inspection chambers are defective and of about 9 million manholes in Germany approximately 2,7 to 4,5 million are in need of rehabilitation. "There will be a great need for investments in the next few years", says Heiko Leihbecher from REHAU.
mehr15.09.2005
Luxemburg farmers place their faith in the E+S Site Road - Optimum load distribution
The Beckerich-Huttange-Nordange main collecting system in Luxemburg, which Weiland Bau S.à.r.l. is constructing on behalf of the Syndicat Intercommunal de Dépollution des Eaux Résiduaires de l’Ouest (SIDERO), is about 3,300 m long. In addition to the new collecting system – a corrugated sheath measuring DN/OD 315 to 400 mm – a district heating pipeline and a duct for an optical fibre cable are also being laid in the trench in a single work process. To protect the ground of what is mainly grazing land, the contracted company is using about 500 running metres of Site Road from Emunds+Staudinger. This satisfies the client’s brief as well as the needs of the affected farmers, for it eliminates extensive soil extraction and removal, as required for the construction of a conventional site road of crushed rock. The temporary Site Road is quickly and easily laid. Owing to their optimum load distribution, the 2.4 m long and 3.8 m wide elements protect the ground effectively from destruction and compaction by construction vehicles.
mehr07.07.2005
Microtunneling to Exacting Standards in Holland
Not only were ground conditions difficult and the water table high, but also tunneling under an excavated canal with banks higher than the surrounding land required exceptional safety measures.
mehr30.05.2005
Storm sewer DN 1200 - Successful rehabilitation with hose relining in Bremen
A hydraulically heavily stressed storm sewer DN 1200, requiring an urgent rehabilitation, but lying in the middle of a main road with several lanes and even in ground water: a horrific constellation in front of which stood the hanseWasser Bremen GmbH in 2004. But for the SAERTEX®-LINER System and the sewer rehabilitation specialists of Hans Brochier GmbH & Co. KG this case was a good opportunity to prove the efficiency of the hose relining procedure with "glass fibre reinforced plastic by means of steam hardening" in accessible nominal widths. Sewer damage under heavy traffic load
mehr24.01.2005
Risk approach to examine strategies for extending the residual life of large pipes
The National Research Council of Canada (NRC), with the financial support of the American Water Works Association Research Foundation (AwwaRF) has developed a new fuzzy-based approach to model the deterioration of large buried pipes using scarce data.
mehr
