2016-09-16
Dams and hydraulic Engineering (Dams and dykes)
- Client: Departement du Cher (18)
- Assignment: Assistance to the client
- Completion date: 2015-2018
- Total cost of the assignment: 30 k €
PROJECT DESCRIPTION AND CHARACTERISTICS
The Goule dam is located in the commune of Bessais-le-Fromental in the department of Cher (18). It is a homogeneous soil embankment dam, with upstream facing consisting of a dry stone wall. Its main dimensions are as follows:
- Length of the dam: 270 m
- Height on foundation: 16 m
- Volume stored on the PHE: 3.8 million m³
ASSIGNMENT
- Monitoring and analysis of auscultation data
- Auscultation Reports
- Advanced Technical Visits
2016-09-16
Dams and hydraulic Engineering (Dams and dykes)
- Client: Municipality of Cenne-Monestiés
- Assignment: Assistance to the project management
- Completion date: 2012 – 2017
- Total cost of the assignment: 60 k €
PROJECT DESCRIPTION AND CHARACTERISTICS
The Cenne-Monestiés dam is a masonry weight dam created in 1883 to meet the water needs of the textile industry. Today the dam is used to supply drinking water to the village. The dam is the property of the commune of Cenne-Monestiés. The site is located in the department of Aude south of the Montagne Noire, about twenty kilometers north-west of Carcassonne, downstream of the Lampy dam and on the river of the same name.
The Cenne-Monestiés dam presents a slight curvature in plan (radius of curvature of 250 m). Its ridge length is 95 m. The height above the natural ground is 22 m for a normal holding volume of 95’500 m3.
ASSIGNMENT
- Monitoring and biannual reports
- Monitoring and analysis of auscultation data
- Drafting of biennial auscultation reports
- Advanced Technical Visits
- Underwater exam supervision
- Security review
- Hazards study
- Hydrological and drainage studies
- Stability study with three-dimensional modeling of the dam
2016-09-16
Dams and hydraulic Engineering (Dams and dykes)
- Client: Collectivité Eau du Bassin Rennais (CEBR)
- Assignment: Assistance to the client
- Operator: Local Public Company (SPL) Eau du Bassin Rennais
- Completion date: 2015 – 2019
- Total cost of the assignment: 30 k €
PROJECT DESCRIPTION AND CHARACTERISTICS
Built between 1973 and 1975, with a flooding in 1976, the Chèze dam can store a maximum volume of 14.5 million m³. It is an embankment dam with a tightly sloped inclined core in clay loam materials. It has a maximum height above its foundations of 41 m and length in ridge of 260 m.
ASSIGNMENT
- Monitoring and analysis of auscultation data
- Preparation of an annual report on auscultation
- Advanced Technical Visits
- Full Technical Exam
- Security review
2016-09-16
Dams and hydraulic Engineering (Hydro-electric power plant)
- Client: Collectivité Eau du Bassin Rennais (CEBR)
- Assignment: Project management for rehabilitation of the power station:
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- installation of a new turbine
- works to restore free movement of eels (upstream and downstream migration);
- automatization of spillway valves and adaptation of the control-command and monitoring of the structure
- Assistance to the project manager for the regulatory monitoring of the dam
- Operator: Local Public Company (SPL) Eau du Bassin Rennais
- Completion date: 2014 – 2019
- Total cost of the assignment: 210k €
PROJECT DESCRIPTION AND CHARACTERISTICS
The Rophémel dam is built on the coastal river of Rance, upstream of the famous tidal plant located at the estuary. It is a construction built from 1931 to 1938 of multiple vaults in concrete support system ” Considère”, leaning on granite. The dam consists of 16 thin reinforced concrete vaults of 5,40 m of opening between walls and of 10,80 m to 25,60 m of variable height. Its crest length is 126 m, its height above the natural ground is 26 m (class A) and it creates a reservoir of 4.4 million m³.
This development is dual-use: drinking water production and electricity production.
The hydroelectric plant located at the foot of the dam is currently equipped with two Kaplan turbines that will be replaced by a single turbine:
- Equipment flow rate: 13.5 m³ / s
- Max. : 23.8 m
- Installed turbines: Kaplan type with vertical axis
- Electrical power max. : 2.65 MW
- Estimated annual production: 2.47 GWh
ASSIGNMENT
The Rophémel sur la Rance dam was commissioned in 1934 as part of a hydroelectric concession entrusted to EDF. Since 1963, it has been used for two purposes: water production for the Rennes basin and electricity production during peak periods.
The SMPBR entrusted GEOS Ingénieurs Conseils with project management (design studies and follow-up) relating to:
- installation of a new turbine,
- carrying out work to restore the free movement of eels, both for the upstream and downstream migration,
- automatization of the spillway valves and adaptation of the control-command and monitoring of the structure.
The assistance mission to the project manager for the regulatory monitoring of the dam includes:
- Monitoring and analysis of auscultation data
- Preparation of an annual report on auscultation
- Advanced Technical Visits
- Full Technical Exam
- Security review
2016-09-16
Dams and hydraulic Engineering (Pumping stations)
- Client: RTS (Radio Television Switzerland)
- Assignment: Project management + coordination of CVSE and electrical engineer representatives
- Total cost of the work: 3,500k CHF
- Total cost of the assignment: 240k CHF
- Completion date: 2015 – 2016
PROJECT DESCRIPTION AND CHARACTERISTICS
The project consists of the realization of a water intake, a pumping station and a discharge in Arve, with capacity of 100 l / s, for free-cooling purposes.
The external works consist of the installation of the pumping network from Arve bed and introduction into the existing building, comprising:
- DN400 HDPE trenches for pumping and rejecting,
- V 3 mm stainless steel strainer in the Arve bed,
- Prefabricated HDPE valve chamber on the RTS forecourt,
- HDPE prefabricated dump chamber at the foot of the wharf wall,
- Rejection of riprap of blocks arranged in the bed of the Arve,
- Carrying out works in the bed of the Arve in a self-supporting sheet pile enclosure PU-18
The internal works consist of the realization of the primary network from the introduction of the building to the exchangers, comprising:
- Stainless steel Ø323 mm return pipes,
- Vacuum pump station for the priming of the siphon comprising 2 Evisa E-50 vacuum pumps of 2 × 50 m³ / h,
- Pumping station comprising 4 KSB-Sewatec pumps with a nominal capacity of 100 l / s,
- Two filtration lines including Boll & Kirch sieve filters and Lakos vortex sand separator,
- Three heat exchangers with a total capacity of 3 MW,
- Reinforcement of the existing civil engineering structures,
ASSIGNMENT
GEOS carried out a project management task comprising (according to SIA 103 (Swiss Standard)):
- Project of works;
- Procedure for requesting authorization;
- Invitations to tender, comparisons of offers, proposals for tenders;
- Execution Project;
- Follow-up;
- Commissioning and completion.
As well as coordination of CVSE engineer and electrician attorneys and management of the project group.
