Composite Geomembrane Bosten East pumping station

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Composite Geomembrane Bosten East pumping station in the trunk Project

Cover the bottom up from the depth of 0.5m to 2.7m of sand and gravel, drainage, embankment of sand filling a depth of 6.45m, 0.5m of sand and gravel covered slopes, sandy soil requires The relative density of not less than 0.7, the relative density of sand and gravel requirement of not less than 0.75, the amount of sand filling side is 31085m3, the Gobi volume filling side 6882m. Bosten East pumping station trunk cross-sectional channel connecting section design shown in Figure 2. Channel design flow of 45m3 / s, check flow of 54m3 / s, the design flow rate of 0.92m / s, check the flow rate 0.98m / s, longitudinal channels 1 to 500. Channel cross section of Figure 2, Figure II connection, geomembrane Introduction 1, geomembrane performance of seepage control by the use of geomembrane and geotextile composite made of impermeable. Impermeable membrane, easy-to-heat welding of polyethylene (PE) film, thickness 0.5mm, impervious strength should be under pressure in the 1.05Mpa 48h impermeable, elastic modulus should not be lower than in the 5cC 70Mpa, temperature a 5 ~ +60 cC, frost resistance (brittle temperature) should not be less than a 60 ℃, connection strength should not be greater than the base metal strength. Non-woven geotextile used acupuncture staple, not less than 200 grams per square meter of the channel specifications for the 200/0.5 with a cloth membrane. Composite geomembrane width are 6m, four sides are not reserved about l0cm composite layer (ie cloth, membrane separation; said left edge) to geomembrane vertical and horizontal connections. Works are made of composite geomembrane used, key performance indicators in Table l and Table 2.2, composite geomembrane laying points ① According to the design requirements and construction conditions to develop a complete set of construction quality management methods and strict rules establish and improve the quality assurance system, from the first unit construction process to the strict implementation of ② geomembrane shipped to the warehouse from the factory, that is sampled, the time require manufacturers to replace the substandard products. ③ good job laying the base surface. Channel geomembrane laying press design requirements to clean up and leveling section, clear the channel bottom and the slope of the large stones, the use of 18 ton vibrating roller compacted desert soil of 50cm to ensure the geomembrane consistent with the base surface. ④ geomembrane laid out by top-down by the side of the channel bottom slope to another slope paving. Note moderate relaxation during the laying of geomembrane to avoid stress concentration and man-made damage. Geomembrane and soil requirements, consistent with formation of benzene board contact surface to prevent the formation of geomembrane wrinkles channel phenomenon. Shop benzene in particular geomembrane above board, it must be formed geotextile, it is consistent with the benzene board. Geomembrane film technology _D deleted Palestinian state next Table 1 Specifications Table 2 geotextile geomembrane Specifications Item Unit Index Remark breaking strength KNIm Die 6.5 Elongation% 25-100CBR tear strength and bursting strength KN0.8 Strength KN to O. 16 vertical permeability cndsK} (10-I10) K = 1.0-9.9 equivalent aperture Mm0.1. O. 509s side up, oil down. The following is due to geomembrane Gobi, the cloth down to protect the film. ⑤ the roll of geomembrane shall be dry and warm weather should stay more than enough pieces to facilitate splicing and adapt to temperature changes. Joints should be parallel to the direction and the maximum tensile stress. Construction is found in the laying of damage should be repaired immediately, and pay attention to fire safety. Item Unit Index Density Kg/m3 destruction of the main tensile stress of 930 Mpa Lan Die l2 Elongation at break% 300% 40 tear strength KN/m3 permeability cnds child lO Figure 3 geomembrane is not the construction site (on the next page 33) system . On the execution of this contract deviations problems, serious analysis, corrected for random acts of breach of contract should be carefully investigated so that steps were standardized contract management, standard management channels, to prevent adverse effects resulting from contract violations. (E) necessary for contract management personnel pre-service training. In water project construction process should be selected with rich working experience, understand the economy, business, and has a high sense of responsibility and professionalism of the staff responsible for contract management. For the contract management staff to conduct pre-job training, in the execution of this contract, to pay attention to the implementation of staff correspondent, so that they are familiar with the contracts, be reasonable, and valid, a section of the execution of the contract, change from passive to conscientiously implement the implementation of the contract contract. (F) supervision team is a good choice to do an important guarantee for contract management. Construction supervision engineers and contractors to contact an important link in the contract management plays an important role in the supervision of highly qualified engineers to fair and honest execution of the contract deal with the practical problems encountered in the process, the implementation of the project have more good predictability, to the good construction to create a relaxed environment,[link widoczny dla zalogowanych], to ensure the smooth implementation of construction projects.