|
|
Feb 28, 2006 The contractor should provide evidence of qualifications to the owner. Background information on key personnel should be furnished to the owner to ensure they have adequate experience. Complete names, affiliations, addresses, and telephone numbers should be provided to allow the owner to contact the references and verify a satisfactory prior performance. If defined in individual specifications, minimum time requirements for start-up operations and … |
|||||
|
|
Feb 28, 2006 The submittals should clarify how the quality control requirements will be satisfied. To assure quality control for materials and equipment, a representative of pipe supplier or ramming system manufacturer may be present on the site to observe site conditions, installation, quality of workmanship, start-up of equipment, operator training, test, adjust, and balance of equipment as applicable, and to initiate operation. Quality control for construction … |
|||||
|
|
Feb 28, 2006 The safety plan is to ensure that the public and workers are protected from construction hazards. This safety plan should include a Contractor's safety plan for the ramming operations and appurtenance installation. The plan should include provisions for lightning and electrical safeguards. |
|||||
|
|
Feb 28, 2006 During the construction process, a contractor has to monitor the project progress and to document how the work is carried out. Various submittals prepared during the construction should include the following:
A construction log of the ramming operation … |
|||||
|
|
||||||
|
|
Mar 22, 2011 |
|||||
|
|
(Image: 267193 - Titelbild Dokumentation) Process: Modernization of small sewage treatment plant (open-cut method) Title: Renovation of a three-chamber dry well by means of an SBR-unit (sequencing batch reactor) Location: Private property Limiting conditions:
|
|||||
|
|
The main task of this construction project was to partly renovate a three-chamber dry well. For this purpose, the SBR-unit Upoclean® BatchPLUS® incl. a sampling manhole was installed in addition to the already existing three-chamber dry well. On completion of the construction works, the SBR-unit functions as a substitute for the first two chambers of the dry … |
|||||
|
|
Machines and equipment The partial renovation of a three-chamber dry well by means of an SBR-unit mainly requires the following machines and equipment:
Tools
|
|||||
|
|
Construction site arrangement The construction site arrangement includes determining the position and storage areas for equipment and material as well as the provision of power and water supplies. As the private property was situated next to a street that was only trafficable to a limited extent (max. 3.5 t), the delivery of the necessary machines and equipment as well as the material was only possible in several approaches using a small truck. The … |
|||||
|
|
Installation of excavation The present inlet to the three-chamber dry well is carefully laid open by means of a pickaxe and a shovel. The position and dimensions of the excavation for the HD-PE-container must be selected and arranged in such a way that the new small sewage treatment plant, upon its completion, can be connected to the present inlet. The present plants in the range of the excavation are partly trimmed by a chain saw and/or removed … |
|||||
|
|
Before the excavation can finally be filled, the plant is put into operation to control its functioning. Afterwards, the main filling of the excavation as well as the excavations for the inlet and outlet and for the connection between control unit and HD-PE-container is carried out. Later on, a gardening company takes over the responsibility for restoring the plants.
|
|||||
|
|
Mar 22, 2011 Modernization of a three-chamber dry well using the open-cut method by means of the new installation of an SBR-unit. |
|||||
|
|
(Image: Prof. Dr.-Ing. Dietrich Stein) Necessary precondition for the functionality of a community and urban development are efficient networks of pipelines and cables that provide a secure supply of water, gas, district heating, electricity and telecommunication as well as an ecologically friendly and secure drain and sewer system, i.e. collection and discharge of waste water. These pipe and cable networks are mostly available in Germany and throughout … |
|||||
|
|
(Image: Example of a water distribution system [DINEN805]) Water supply systems provide reliable and safe potable water supply to society as well as a water supply for commerce, trade, industry, agriculture and fire fighting. The actual distribution of water for the consumer is taken over by the water distribution system consisting of pipelines (water piping), water reservoirs, pumping stations and other installations. According to European standard … |
|||||
|
|
At the start of the 1960's, Germany started introducing energy-rich natural gas, which replaced the town gas generated from coal as well as the coke gas supplied over long distances that were available at the time [Altma83]. According to EN 12007 [DINEN12007-1], gas is a gaseous fuel that is gaseous at a temperature from 15°C and at atmospheric pressure (1.01325 bar absolute). It is used for supplying households with energy for heating, cooking and … |
|||||
|
|
District heating is a pipe guided energy whereby the thermal energy is generated by a central generating plant, usually a steam power plant or heating plant, and is fed with the aid of a compressor via pressure pipes to the consumer for space heating, hot water heating or production purposes and from there is led back again to the power or heating plant [AGFW93]. A difference is made between regional and district heating supply depending on the centralization … |
|||||
|
|
The largest number of drain and sewer systems are designated as gravity systems [DINEN752b] [DINEN476:1997] where, according to EN 752-1 [DINEN752b] "flow is caused by the force of gravity and where the pipeline (remarks: gravity pipe [DINEN12889:2000]) is designed normally to operate partially full". In the Federal Republic of Germany, drain and sewer systems are divided into two parts: drain systems and sewer systems. Drain systems are understood, … |
|||||
|
|
(Image: Arrangement of a pressure sewerage system (PSS) [DINEN1671]) According to EN 1671 [DINEN1671] a pressure sewerage system (PSS) is a "system for transporting domestic wastewater comprising a single pressure pipe or a branched network of pressure pipes (Remarks: branched or meshed network (Abschnitt 1.1.1)) where the pressure generating equipment is always located at the upstream end of the pressure pipe(s). The disposal point is the point the … |
|||||
|
|
A vacuum sewerage … |
|||||
|
|
Drain and sewer systems serve to collect and discharge sewage in the form of wastewater and/or surface water. Wastewater, according to EN 752-1 [DINEN752b] is defined as "water changed by use and discharged to a drain or sewer system" and surface water as "water from precipitation, which has not seeped into the ground and which is discharged to the drain or sewer system directly from the ground or from exterior building surfaces." Drain and sewer systems, … |
|||||
|
|
Telecommunication (TC) is the exchange of messages and information in the form of tones, pictures, text or data over larger distances to end devices such as telephones, television, fax or data processing devices (e.g. computers). Broadband communication (BC) is a generic term for those forms of telecommunication, which, because of the quantity of information to be transmitted per unit of time, require a relatively large frequency land (mostly several … |
|||||
|
|
An electrical energy supply system consists of the power plants that generate the electrical energy (electrical power), lines that transport the current to the consumers (e.g. households, business and industry, public transportation systems and street lighting), where it is converted into other forms of energy such as mechanical energy, heat and light energy, as well as transformer stations (transformers) that connect the different voltage levels … |
|||||
|
|
The transmission and distribution of electrical energy for power supply (Abschnitt 1.1.5.2) as well as of speech, data and pictures for communication purposes (Abschnitt 1.1.5.1) is carried out - except for the possibility of wireless communication - either via overhead cables or via underground cable lines, also called cables for short. Cables are used almost exclusively for this purpose inside towns and industrial centres and these are installed … |
|||||
|
|
In the following, the line systems shown in Bild 1 are introduced with reference to the important aspects of trenchless installation of cables and pipes such as:
Hidden among the various types of piping, for instance, are mineral oil pipes, tube post lines [Arnol00] [Stein00b] [Heck65] transport pipes for goods … |
11094 search results:
