Tenders are invited for Construction of Haffir Dam 2.1 Mass Excavation (in any kind of soil) for Haffir starting from the River bed and for embankment gripping (for haffir and lateral wing) m3 7,601.80 $- $- 2.2 Excavate the Silt trap as shown by the drawing in front of the dam m3 191.70 $- $- 2.3 Excavate and land rectification for overflow channel and compact by Machinary m3 75.00 $- $- "Embankment During the construction phases, each level of soil will be created by overlapping layers with a thickness no greater than 30 cm, which will be appropriately leveled and then compacted (with possible wetting to the optimum humidity) in order to obtain a degree of compaction of no less than 95% PROCTOR standard" 2.4 Approved hardcore filling spread well rammed and compacted for embankment all around the Haffir Dam m3 2,106.72 $- $- 2.5 Approved hardcore filling spread well rammed and compacted for embankment of the lateral wings and land rectification for water discharging at the outflow and for first flush canal m3 600.00 $- $- Concrete work 2.6 "Mass concrete M20 (Mix Ratio 1:1.5:3, 28 DAY CUBE CHARACTERISTIC STRENGTH OF THE CONCRETE HAS TO BE MINIMUM 20N/mm2), not reinforced; all works and materials included as per TS; including all temporary and auxiliary works. Lay in foundation 7cm thick under foundation slab." m3 19.53 $- $- 2.7 "Reinforced concrete Class M25 ( 28 DAY CUBE CHARACTERISTIC STRENGTH OF THE CONCRETE HAS TO BE MINIMUM 25N/mm2), all works and materials (incl. Reinforcement bars) included as per TS; including all temporary and auxiliary works R.C.C Slab foundation and wall for Desilting Basin (with n. 2 weirs) and spillway (n.1 Weir) inside Haffir Dam, including 12mm dia steel bars (B450C) @200 mm for each perpendicular direction including centering complete and comprehensive all form work and curing of concrete as per relative drawings and according to the instruction of the engineers." 2.7.1 Desilting Weir m3 52.00 $- $- 2.7.2 Settlement chamber m3 12.00 $- $- 2.7.3 Outflow m3 10.00 $- $- Wing protection against erosion 2.10 Construct stone walls as per relative drawings with the use of cement sand mortar of 1:3 proportion (1 cement: 3 clean coarse sand). Corner stone should be good stones dressed to correct angles and laid as headers and stretchers. Bond stones shall be provided 100cm c/c vertically and horizontally. Wall should be laid in courses of 40cm height. All the gaps between stones shall be filled with cement mortar and wall should be kept moist and protected from sun for a period of at least 10 days. m3 52.00 $- $- Steel work 2.11 "Installation of a permanent Trash Screen at the beginning of the Settlement chamber with heavy gauge mesh able to stop the biggest materials. It will be made with an height of 80cm and a total lenght of 8m using reinforcement steel Diameter 16mm@100mm longitudinal and Diameter 8mm @ 100mm perpendiculary. It will be fixed to the slab and support blocks." LS 1.00 $- $- "HDPE As requested by the contracting agency, no geotextile is envisioned to be installed, although for this type of works it is usually recommended. As such, the HDPE installation is considered to cover also the preparation of the terrain, so as to avoid any contact between the HDPE and any object or material which might potentially damage it, such as rocks" 2.12 Purchase, transport, place in situ of 1.5 mm HDPE sheet and whatever necessary to complete the work according to the enginners instructions m2 5,133.29 $- $- Safety equipment 2.13 "Supply and installation of a fence with a minimum height of 2.00 m made with galvanized and plasticized wire mesh in the color chosen by the engineer with rhomboidal mesh of mm. 50x50, fixed to the upper and lower galvanized and plasticized wires, with a diameter of 2.8 mm, and to an adequate number of intermediate wires of 3.0mm, complete with blades and T-shaped of mm. 40x40x4 in galvanized and plasticized steel, performed in a workmanlike manner and according to the indications of the engineer, on prefabricated concrete plinths with dimensions of 40x40 and H = 40 cm with appropriate hole, for housing the columns, gate and access door. " m 380.00 $- $- 2.14 Installation of a removeble metallic protection fence at the inlet of the Haffir structures (min heigth 2.00m, formed with steel bar uprights Diameter 20 mm and electro-welded mesh (15x15)cm Dia 8mm as per the construction detail in the drawings or as indicated by the engineers. This item includes both the supply of the material and the welding required during construction as well as the anchoring device to the structure (steel pipe with fixing system using a through screw). It is comprehensive also of the concrete foundation (or masonry plinths if clearly specified in the drawings). m 14.00 $- $- Tender Link : https://somalijobs.com/tenders
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