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GSTT Information Sheet No. 11
GSTT Information Sheet No. 11

Comparison of open trench and trenchless construction methods – direct and indirect costs in pipeline work
4th edition January 2016
 

The constant improvements and developments in the various trenchless pipeline construction techniques have led to an expansion of existing operational limits. It is therefore essential, in cases where projects can be realised by either open trench or trenchless techniques, to study and compare the economic viability of these methods more closely than ever before.

Alongside the direct costs, the indirect costs in terms of sustainability must be taken into account when planning, evaluating and awarding a contract and must figure in an integrated analysis of capital costs and cost effectiveness.

The present 4th edition of GSTT Information Sheet nº 11 has been expanded, in comparison with the 2nd edition, and presents certain points in greater detail. Supplement "pressure pipe construction", Chapter 5.0, incl. Calculation tool




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GSTT Information Sheet No. 12
GSTT Information Sheet No. 12

Leitungsverlegung in vorhandenen Netzen
Cable-laying in existing networks

(Version in German and English)

2nd revised Edition
April 2005

GSTT Information No. 12, has been revised and was re-published on 25th April, 2005. Due to the high demand within the international markets, the first edition (1999) was revised and translated into English making it the first bilingual publication of its kind. GSTT has received inquiries from European Countries, North America, and also from countries in East Asia. The GSTT Information No. 12 has become a technical standard work for cable-laying in existing networks. Its benchmark position has resulted in its revision to include the newest techniques and methods used within the industry.



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GSTT Information Sheet No. 18
GSTT Information Sheet No. 18

Mortar specifications for sewage pipes and public drainage installations
Part 1: Cement based mortars

December 2004

This GSTT Information Sheet No.18 builds on the experiences of recent decades in sewer construction and sewer renovation, and covers underground installations and /or systems designed for collecting and draining sewage. In the field of water purification plants there are inevitably overlaps with other engineering guidance. It is up to the specialist engineer to weigh up the stipulations of the different guidelines. This paper offers support to all who are involved in sewer construction. It may help the producer of building materials, by setting out the minimum tests that need to be made, and on the other hand may suggest to clients how to compare products. This paper replaces the specifications for cementitious mineral mortars (Table E) published in GSTT Information Sheet No.13 “Renovation of man-accessible sewage pipes and public drainage installations”. This paper cannot be taken to refer to cement-free mortars or reaction resin mortars. A further GSTT Information Sheet will be issued on those subjects. The contributors to this Information Sheet welcome any reaction which may serve to improve and complete what is said here.


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GSTT Information Sheet No. 24
GSTT Information Sheet No. 24

Initiative for alternative installation methods in pipeline construction
Trenchless – cost saving - safe
1st edition, November 2010

When building underground infrastructure, terrain and soil are penetrated, i.e. the condition of the ground is disturbed by the digging of pits and trenches. Such inner-city construction operations usually take place in terrain where there is already infrastructure in the form of existing pipes, cables or sewers.

By comparing alternative construction procedures with the present-day open trench methods, one gains a realistic picture of the actual current situation. This information sheet offers a comprehensive review of facts, figures and information that clearly support our campaign for alternative construction methods in pipe laying since these options are shown to be trenchless, cost-effective, economical and safe.


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GSTT Information Sheet No. 27
GSTT Information Sheet No. 27

Carbon calculator for CIPP relining (Version 2.2 - May 2014)

The "Energy Calculator" is based on a comprehensive Microsoft Excel calculation and is implemented with the help of this platform. The program is made up of different worksheets. The first is an input mask relevant for the user. Furthermore, the calculation tables for each individual method are located on separate worksheets. In addition, the "Energy Calculator" contains an overview and diagrams for showing calculation results.

The user manual describes the "Energy Calculator", a calculation template, which allows to determine the system-induced carbon emissions resulting from 3 different pipe relining methods and to compare them. By entering project-specific boundary conditions, the user is given the opportunity to predict the installation emissions for specific projects. Furthermore, it is determined for each method, the carbon emissions in the production of the liner in the factory and during transport to site.


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GSTT Information Sheet No. 28 [1a and 1b]
GSTT Information Sheet No. 28 [1a and 1b]

This specification template is designed to provide the author of the draft with instructions on the possible tendering of controlled pipe jacking ID 150 – ID 800. It contains only those RFQ items that are necessary for the actual pipe jacking tendering in view of the author of this guideline.

Pits instead of trenches - The better solution 
There is another way - better and more efficiently. For new construction and replacement of pipelines there exists an alternative to the pipe jacking with a lot of convincing advantages for nearly every application. In the last 35 years the according technologies have been consistently and continuously developed and expanded that they now in no way inferior to the open cut - on the contrary - they have unique technical, environmental and economic benefits. 

GSTT information 28-1b "TENDER FOR UNMANNED, CONTROLLED PIPE JACKING ND 150 TO ND 800” should give assistance and orientation to the person who is going to preparing a tender of steered pipe jacking ND 150 - ND 800. The information contains only those service items which are required for tender of the actual process of pipe jacking. The zip file contains the information 28-1a (pdf) as well as the model service specifications (WORD and PDF format).


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GSTT Information Sheet No. 29
GSTT Information Sheet No. 29

Pilot study Natural Capital Assesment for trenchless pipe laying

Natural capital assessments allow companies to assess and evaluate the environmental impact of a product, project or corporation. The results enable better business decision-making. By conducting two pilot studies, the Global Nature Fund (GNF) and its project partners have gained crucial initial experience in conducting such assessments. This document provides information on various aspects of the first pilot study.
 
The pilot study was carried out by GNF, in corporation with proponents of the „trenchless“ technology (GSTT and TRACTO-TECHNIK), in order to assess ecological benefits of the technology. One of the most important parts of the study was to present the results to potential clients both within and outside Germany. This is particularly relevant in Germany, as infrastructure measures are implemented by the public sector, and thus decisions are still mainly based on conventional economic indicators – although there is an obligation to consider common welfare e.g. nature and the environment.



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