Portfolio Category: Sewerage Networks

Project description

---

The project initiated by the Municipality of Bucharest, Romania, comprised of rehabilitation of the main wastewater collectors A0 and B0, collectors A072 and B06.

The rehabilitation works included: shotcreting, joints sealing  and GRP (PAFSIN) pipe installed in open trench.

The total length of the rehabilitated collectors is 1.728,0 m, of which, based on the rehabilitation type, had the following lengths:

• Shotcreting – 743,0 m
• Joints sealing – 853,0 m
• GRP pipe installed in open trench – 132,0 m

The characteristic sections of the rehabilitated collectors were:

• Shotcrete: egg-shape 180 / 270 cm, bell-shape 200 / 180 cm;
• Joint sealing: circular DN180 cm;
• GRP pipe installed in open trench: egg-shape 170 / 255 cm.

The provided design works within the project did include:

• Structural rehabilitation of the existing collectors;
• Elimination of collector infiltrations;
• Temporary works for project implementation such as access pit shoring, collectors dewatering, wastewater stream diversion, working site ventilation and lighting, site organization;
• Permitting;
• Technical assistance;
• Contractor due diligence.

Project description

---

The originator of the project is the Municipality of Bucharest, Romania which envisioned to extend the life of the Romanian capital’s main wastewater conveyance sewer system (Caseta) as well as of its left side main drainage system within the sector Ciurel-Unirii (Lot 1), for a total length of approximately 5,60 km.

In the early 1980s, Dambovita river was serving as catchment for city’s stormwater runoff but also for city’s wastewater discharge, making the use of the river’s water practically impossible downstream of the Romania capital. This unusual and health hazardous situation was addressed in 1985 by the construction of the main wastewater conveyance sewer system (Caseta) underneath of Dambovita river’s bed for a total length of about 10 km. The wastewater convenience system part of sector Ciurel-Unirii (Lot 1) consisted of two different transversal sections 2-3,30 m x 2,42 m and 2-4,00 m x 3,06 m, run entirely under the river’s reconstructed bed.

The provided design works within the project have included:

• Structural rehabilitation of the Caseta and its left side drainage system;
• Castea discharge sewers rehabilitation;
• Abandoned overflow closing of the main B0 sewer’s discharge chambers;
• Eroilor and Opereta drainage water pumping stations rehabilitation (equipment, mechanical, instrumentation, automation, security);
• Caseta separation wall communication openings (windows) for wastewater level equalization and distribution along the two adjacent rectangular channels;
• Caseta venting pipes upstream and downstream of Dambovita river overflow structures;
• Elimination of all infiltrations in the Caseta and its left side drainage system;
• Cast iron potable water main (Dn600 mm) overpass at Eroilor rectangular discharge structure;
• Caseta permanent stoplogs installation/replacement;
• Dambovita river access ramps;
• Temporary works for project implementation such as working site dewatering, wastewater stream diversion, working site ventilation and lighting, site organization;
• Geotechnical investigation;
• Permitting;
• Technical assistance;
• Contractor due diligence.

Project description

---

The originator of the project is the Municipality of Buchatest, Romania which envisioned to extend the life of the Romanian capital’s main wastewater conveyance sewer system (Caseta) as well as of its left side main drainage system within the sector Unirii-Vitan (Lot 2), for a total length of approximately 4,90 km.

In the early 1980s, Dambovita river was serving as catchment for city’s stormwater runoff but also for city’s wastewater discharge, making the use of the river’s water practically impossible downstream of the Romania capital. This unusual and health hazardous situation for Bucharest’s inhabitants was addressed in 1985 by the construction of the main wastewater conveyance sewer system (Caseta) underneath of Dambovita river’s bed for a total length of about 10 km. The wastewater convenience system part of sector Unirii-Vitan (Lot 2) consisted of two different transversal sections 2-4,00 m x 3,06  m and 2-4,50 m x 3,06 m, run entirely under the river’s reconstructed bed.

The provided design works within the project have included:

• Structural rehabilitation of the Caseta and its left side drainage system;
• Castea discharge sewers rehabilitation;
• Abandoned overflow closing of the main B0 sewer’s discharge chambers;
• Mihai Bravu drainage water pumping station rehabilitation (equipment, mechanical, instrumentation, automation, security);
• Caseta separation wall communication openings (windows) for wastewater level equalization and distribution along the two adjacent rectangular channels;
• Caseta venting pipes upstream and downstream of Dambovita river overflow structures;
• Elimination of all infiltrations in the Caseta and its left side drainage system;
• Direction changing hydraulic directing wall;
• Caseta permanent stoplogs installation/replacement;
• Dambovita river access ramps;
• Temporary works for project implementation such as working site dewatering, wastewater stream diversion, working site ventilation and lighting, site organization;
• Geotechnical investigation;
• Permitting;
• Technical assistance;
• Contractor due diligence.

Project description

---

The project initiated by the Municipality of Bucharest, Romania, comprised of rehabilitation of the main wastewater collectors A0 and B0.

The rehabilitation works included: shotcreting, relining and joints sealing.

The total length of the rehabilitated collectors is 2.181,0 m, of which, based on the rehabilitation type, had the following lengths:

• Shotcreting – 1.176,0 m
• Relining – 503,0 m
• Joints sealing – 502,0 m

The characteristic sections of the rehabilitated collectors were:

• Shotcrete: rectangular 300 x 300 cm, rectangular 250 x 360 cm, bell 240/200 cm, egg-shape 160/240 cm;
• Relining (GRP piping): egg-shape 160/240 cm;
• Joint sealing: rectangular 300 x 360 cm, circular Dn180 cm.

The provided design works within the project did include:

• Structural rehabilitation of the existing collectors;
• Elimination of infiltrations in collectors;
• Temporary works for project implementation such as access pit shoring, collectors dewatering, wastewater stream diversion, working site ventilation and lighting, site organization;
• Permitting;
• Technical assistance;
• Contractor due diligence.

Project description

---

The project initiated by the Municipality of Bucharest, Romania, comprised of rehabilitation of the main wastewater collectors A0 and B0.

The rehabilitation works included: shotcreting, relining, joints sealing  and micro-tunneling (pipe jacking)

The total length of the rehabilitated collectors is 10.838,70 m, of which, based on the rehabilitation type, had the following lengths:

• Shotcreting – 2.714,0 m
• Relining – 4.968,5 m
• Joints sealing – 2.742,0 m
• Micro-tunneling (pipe jacking) – 414,0 m

The characteristic sections of the rehabilitated collectors were:

• Shotcrete: rectangular 300 x 300 cm, rectangular 250 x 360 cm, bell 240 / 200 cm, bell 200 / 180 cm, egg-shape 180 / 270 cm, egg-shape 160 / 240 cm;
• Relining (GRP piping): egg-shape 160 / 240 cm, egg-shape 140 / 210 cm, egg-shape 110 / 165 cm, egg-shape 100 / 195 cm, egg-shape 100 / 150 cm, circular DN180 cm;
• Joint sealing: rectangular 300 x 360 cm, rectangular 250 x 360 cm, circular DN220 cm, circular DN180 cm;
• Micro-tunneling: concrete circular DN100 cm.

The provided design works within the project did include:

• Structural rehabilitation of the existing collectors;
• Elimination of collector infiltrations;
• Temporary works for project implementation such as access pit shoring, collectors dewatering, wastewater stream diversion, working site ventilation and lighting, site organization;
• Permitting;
• Technical assistance;
• Contractor due diligence.

Project description

---

The investment carried out by the Bucharest Municipality within the investment program Glina wastewater treatment plant-Phase I had the goal to rehabilitate the existing stormwater network within Glina wastewater treatment plant. The applied methods of rehabilitation included two no-dig technologies such as TekFlex (application of a cement-based liner) and Easy Liner a CIPP (Cure-In-Place Pipe) technology.

For each rehabilitated pipe, the activities provided by our teams within the contract included:

• Working site preparation
• Pipe isolation from the network and pipe dewatering
• Pipe cleaning
• Pipe pre-works video inspection
• Rehabilitation method application
• Pipe water tightness test/pressure air test
• Pipe post-works video inspection
• Landscape arrangement to the initial condition.

The work quantities per technology type and pipe diameter were:

• TekFlex: Dn600 mm – 422,0 m; Dn800 mm -226,0m; Dn1000 mm – 445,0m; Dn1200 mm – 305,0 m.
• Easy Liner: Dn200 mm – 207,0m; Dn300 mm – 681,0m; Dn400 mm – 795,0m; Dn500 mm – 797,0m.

Project description

---

Within this contract, our engineers provided hydraulic modelling and dimensioning of the sewerage network for Petrila (Hunedoara County, Romania).

The modelling has been applied for the city’s wastewater separate/combined sewer system and included the following deliverables:

• Hydraulic modeling
• Model description and results
• Bill of quantities

Project description

---

Within this contract, our engineers provided hydraulic modelling and dimensioning of the sewerage network for Aninoasa (Hunedoara county, Romania).

The modelling has been applied for the city’s wastewater separate/combined sewer system and included the following deliverables:

• Hydraulic modeling
• Model description and results
• Bill of quantities

Project description

---

Within this contract, our engineers provided hydraulic modelling and dimensioning of the sewerage network for Comarnic city (Prahova county, Romania).

The modelling has been applied for the city’s wastewater separate sewer system and included the following deliverables:

• Hydraulic modeling
• Model description and results
• Bill of quantities

Project description

---

Within this contract, our engineers provided hydraulic modelling and dimensioning of the sewerage network for Busteni city (Prahova county, Romania).

The modelling has been applied for the city’s wastewater separate sewer system and included the following deliverables:

• Hydraulic modeling
• Model description and results
• Bill of quantities