3 of 49 Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 05: Earth Works, Pipe Works and Ground Improvement  5.3.9.4$_{ }$ Foundation and Bedding........................................................................................ 24$_{ }$ 5.3.9.5$_{ }$ Jointing and Cutting .............................................................................................. 25$_{ }$ 5.3.9.6$_{ }$ Curves and Bends .................................................................................................. 25$_{ }$ 5.3.9.7$_{ }$ Backfilling of pipe trench ...................................................................................... 26$_{ }$ 5.3.9.8$_{ }$ Concrete Bedding and Surrounding ...................................................................... 26$_{ }$ 5.3.9.9$_{ }$ Floating, Submerging and Placing of Pipeline Sections........................................ 26$_{ }$ 5.3.10$_{ }$ Testing of Pipelines ............................................................................................... 27$_{ }$ 5.3.10.1 Precautions Prior to Testing Pipelines................................................................... 27$_{ }$ 5.3.10.2 Testing Method Programme and Notification ....................................................... 28$_{ }$ 5.3.10.3 Testing of Non-Pressure Pipelines ........................................................................ 28$_{ }$ 5.3.10.4 Leakage test ........................................................................................................... 28$_{ }$ 5.3.10.5 Water Test for Non-Pressure Pipelines ................................................................. 28$_{ }$ 5.3.10.6 Air Test for Non-Pressure Pipelines...................................................................... 29$_{ }$ 5.3.10.7 Testing of Pressure Pipelines (excluding PVC and Polyethylene pressure pipes) 29$_{ }$ 5.3.10.8 Testing of PVC and Polyethylene Pressure Pipes ................................................. 30$_{ }$ 5.3.10.9 Deformation testing of plastic pipes ...................................................................... 30$_{ }$ 5.3.11$_{ }$ Manholes and Chambers ....................................................................................... 31$_{ }$ 5.4$_{ }$ Ground Improvement ............................................................................................ 32$_{ }$ 5.4.1$_{ }$ General .................................................................................................................. 32$_{ }$ 5.4.2$_{ }$ Soil replacement .................................................................................................... 32$_{ }$ 5.4.3$_{ }$ Admixture stabilization ......................................................................................... 32$_{ }$ 5.4.4$_{ }$ Jet grout columns................................................................................................... 32$_{ }$ 5.4.5$_{ }$ Prefabricated vertical drains (Wick drains - strip drains)...................................... 33$_{ }$ 5.4.6$_{ }$ Pile Foundations .................................................................................................... 34$_{ }$ 5.4.6.1$_{ }$ General .................................................................................................................. 34$_{ }$ 5.4.6.2$_{ }$ Types of piles ........................................................................................................ 35$_{ }$ 5.4.6.3$_{ }$ Design of piles ....................................................................................................... 35$_{ }$ 5.4.6.4$_{ }$ Preliminary test piles ............................................................................................. 35$_{ }$ 5.4.6.5$_{ }$ Lengths and tolerances .......................................................................................... 36$_{ }$ 5.4.6.6$_{ }$ Sequence for construction ..................................................................................... 37$_{ }$ 5.4.6.7$_{ }$ Driving piles .......................................................................................................... 37$_{ }$ 5.4.6.8$_{ }$ Repair and lengthening of piles ............................................................................. 38$_{ }$ 5.4.6.9$_{ }$ Reinforcement ....................................................................................................... 38$_{ }$ 5.4.6.10 Pile shoes ............................................................................................................... 39$_{ }$ 5.4.6.11 Records .................................................................................................................. 39$_{ }$ 5_Vol3_d4.3_Section 5 Earth and pipe works_en_GIR_rev6.docx 