Biện pháp thi công cọc BTXM 40x40

LACH HUYEN PORT INFRASTRUCTURE CONSTRUCTION PROJECT oOo CONTRACT PACKAGE No.6: CONSTRUCTION OF KM0+000-KM15+630 METHOD STATEMENT OF 40X40 CM CONCRETE PILE CASTING (ABUTMENT A2, SONG CAM BRDIGE) DATE October, 2015 REVISION PURPOSE 1st Submission ISSUED BY LACH HUYEN PORT INFRASTRUCTURE CONSTRUCTION PROJECT oOo CONTRACT PACKAGE No.6: CONSTRUCTION OF KM0+000-KM15+630 METHOD STATEMENT OF 40X40 CM CONCRETE PILE CASTING (ABUTMENT A2, SONG CAM BRDIGE) PREPARED BY : DUONG TUAN ANH CHECKED BY : LE VAN VINH REVIEWED BY : NGUYEN VAN NGHIA ON BEHALF OF TRUONG SON DO MANH HUNG DATE October, 2015 REVISION PURPOSE 1st Submission ISSUED BY Lach Huyen Po rt Infrastructure Construction Project (Road and Bridge Portion) Contract Package No.6 METHOD STATEMENT OF 40X40CM CONCRETE PILE CASTING CONTENTS Ge ne ral 2 Summary of work quantities Summary of equipme nt and manpowe r a) Equip me nt & mac hine b) Manpower for construction Construction plan of 40x40 concrete pile casting Working time Material 6.1 Cement: 6.2 Water for Concrete Mixing and Curing: 6.3 Aggregates 6.4 Steel reinforcement: 6.5 Form oil or release agent for the formwork Method state ment 7.1 Construction procedure of precast piles 7.2 Chart of construction procedure and the point of inspection and acceptance 7.3 Chart of construction technology line 7.4 Construction requirements 7.5 Formwork Installation 10 7.6 Concreting pile concrete segment and curing as technical requirements 11 7.7 Formwork removal and curing concrete 12 7.8 Separating, stock precast pile 13 7.9 Inspection for approval of precast pile 13 Quanlity Control: 15 Safety & Environment Issues: 16 10 Pile testing: 17 Appendix 18 | Method statement of 40x40cm c o n c r e t e pile casting Lach Huyen Po rt Infrastructure Construction Project (Road and Bridge Portion) Contract Package No.6 General - This method statement is described works as the following: + 40x40 cm concrete pile casting - The works need manpower, equipment, tools and necessary others to complete the works as shown in the drawings Summary of work quantities Table 1: Work quantities No • Work Item 40x40 reinforced concrete pile Unit m Quantities 7.304 Remark This quantities are shown in Drawing Site organization chart is attached as appendix Summary of equipment and manpower a) Equipment & machine Table 2: Equipment & mach ine No Factories & Equipment Quantit y Model/ Capacity Year Producer Owner Thái Sơn Crane - Welding machine 2007 Bar bender Thái Sơn Bar cutter Thái Sơn Dump Truck - 8m3 2010 WIM TG 301P Zincom cesco 8m3LP Thái Sơn Thái Sơn Power generator 110 KVA 2004 IVECO 100/110 KVA Water pump machine 3m3 / h 2008 OVM UB Thái Sơn Truck 10 T 2004 Hyundai HD700 Thái Sơn Gantry crane 40 T 2009 10 Vibrator | Method statement of 40x40cm c o n c r e t e pile casting Thái Sơn Thái Sơn Thái Sơn Lach Huyen Po rt Infrastructure Construction Project (Road and Bridge Portion) Contract Package No.6 b) Manpower for construction - Working time shall be shifts/per day (if approved by the Engineer) , therefore, manpower should be arranged based on shifts to ensure it is always enough manpower for each shift as the following: No Position Unit Quantity Team leader person Inspector people 3 Welder people Electrician person people Rebar fabricators Mix truck & equipment people Surveyor person Worker people 15 Remark Construction plan of 40x40 concrete pile casting The intended date starts for construction on November 01, 2015 with working team arranged as the following: - 40x40 concrete pile casting 2015 I Start End Nov Dec 40x40 cm reinforced t concrete November December pile casting e 01, 2015 31, 2015 t Working time e - We shall work duringmdaytime and days/week but if there is requirement of construction progress to meet project schedule, we will carry out overtime under the s Engineer’s consent - The working time shall be shown as below: + days/per week + 24 hours/per day Material No - Concrete class of precast pile is class D 30 Mpa - Materials will be submitted to the Engineer’s approval and material tests in laboratory will be implemented before commencement of embankment work under the inspection of the Engineer All materials are used for construction shall meet the requirements of technical specification in project and must be approved by the Engineer Material must comply and base on the technical specifications as the following: | Method statement of 40x40cm c o n c r e t e pile casting Lach Huyen Po rt Infrastructure Construction Project (Road and Bridge Portion) Contract Package No.6 6.1 Cement: Vicem Hai Phong Cement shall be Portland cement Type I, complying in all respects with ASTM C150 (AASHTO M85 All cement shall be manufacturer’s standard grey cement Cement shall be delivered to the Site in sealed bags or watertight barrels bearing the manufacturer’s name, cement type and the date of manufacture The source of supply of cement shall be subject to the Engineer’s approval and the Contractor shall at all times furnish the manufacturer’s test certificates and proof that the specifications have been complied with certified by an independent agency in the country of origin The Engineer has the power to reject a part or the whole of any consignment of cement if he considers it unsuitable for use in the Works Bagged cement shall be stored in waterproof sheds or other such temporary buildings approved by the Engineer Storage areas shall be perfectly dry with the floors raised well above the ground The storage capacity shall correspond to the amount of concrete required for the largest units to be cast The piles shall be not more than bags height These buildings shall be used exclusively for the storage of cement, and at the completion of the Works the buildings shall remain the property of the Contractor and shall be dismantled and removed, the foundations broken up and the site restored to its original condition by the Contractor Cement delivered by bulk carriers shall be stored in silos made for cement storage All operations for handling of bulk cement shall be by methods that prevent contamination of the cement The cement storage silos shall be provided with interior moisture control devices that keep the cement dry and prevent premature hydration in the silos The silos shall be provided with access ladders and entryways so that samples can be extracted from various levels of each silo for testing purposes A free passage of at least one meter shall be left between the cement and the sidewalls of the sheds Access ways shall also be left between the stored containers of cement such that every container is visible Each consignment of cement shall be stored apart from earlier consignments and consignments shall be used in the order in which they are delivered Any consignment which has become caked or otherwise adversely affected shall be removed from the Site completely by the Contractor’s own expense The Contractor shall provide weighing machines, whi c h shall be kept permanently in each shed for checking the weight of the bags or barrels of cement The Engineer shall have access at all times to the cement storage sheds 6.2 Water for Concrete Mixing and Curing: Water from supplier of Hai Phong water factory - Only potable water free from oil, salt, acid, sugar, vegetable or any other substance injurious to the concrete, may be used for mixing concrete and curing concrete and other products containing cement - The Engineer may require additional compliance testing at any time, of any water sources 6.3 Aggregates Aggregates shall be free of substances that react deleteriously with alkali in the cement in an amount sufficient to cause excessive expansion of the concrete The | Method statement of 40x40cm c o n c r e t e pile casting Lach Huyen Po rt Infrastructure Construction Project (Road and Bridge Portion) Contract Package No.6 constructor will submitted certificate and documents to the Engineer’s approval This evidence shall include service records of concrete of comparable properties under similar conditions of exposure and/or certified records of tests by a testing laboratory that meets the requirements of ASTM C1077 Tests shall be made in accordance with ASTM-C227, ASTM-C287 and ASTM-C295 All aggregates shall consist of tough, hard, durable and uncoated particles The Contractor shall be responsible for satisfactorily processing this material to meet the requirements of these Specifications Thirty calendar days before starting work, the Contractor shall recommend the Engineer on the sources of aggregates used and sample under the Engineer’s witness and the Contractor will carry out testing before they are brought to the Site Approval of the aggregate Quality and/or gradation shall not relieve the Contractor’s responsibility to fabricate concrete of the strength specified Aggregates shall be stored to prevent segregation and contamination The center of the storage area shall be free of excess moisture Aggregate which has become segregated or contaminated with foreign matter during storage or handling shall be rejected and shall be removed and reprocessed and/or replaced with material of acceptable Quality Aggregates shall be stored in sufficient quantity to ensure that there is no interruption of concreting work at any time Both fine and coarse aggregates shall be tested in accordance with the following standards: Compressive Strength • ASTM C39 Organic Impurities • ASTM C40 Mortar Strength • ASTM C87 Soundness • ASTM C88 Coal and Lignite • ASTM C123 Sieve Analysis • ASTM C136 6.3.1 Fine Aggregate: Sand of Lo River at Sam Duong, Son Duong, Tuyen Quang - - Fine aggregate for Portland cement concrete shall consist of natural sand or other inert materials with similar characteristics, having hard, strong, durable particles Fine aggregate shall be clean and free from extraneous materials, clay balls, organic matter or other detrimental material in accordance with AASHTO M6 The maximum combined quantity of soluble chloride and sulphate in fine aggregate shall not exceed 1,000 ppm Fine aggregate grading shall be reasonably graded and shall meet the grading requirements mentioned in Table Fine aggregate shall be of such uniformity that the fineness modulus as defined in AASHTO M6 shall not vary more than 0.20 in either way from the fineness modulus of the representative samples used in the mix designs Tabe3: Grading Requirements of Fine Aggregate Sieve Size (mm) Percent Passing by Weight （ %） 9.5 100 4.75 95 - 100 | Method statement of 40x40cm c o n c r e t e pile casting Lach Huyen Po rt Infrastructure Construction Project (Road and Bridge Portion) Contract Package No.6 2.36 80 - 100 1.18 50 - 85 0.600 25 - 60 0.300 - 30 0.150 - 10 6.3.2.Coarse Aggregate: Stone of Thong Nhat, Phu Thu, Kinh Mon, Hai Duong - - Coarse aggregate shall be crushed aggregate for reinforced concrete works and non- reinforced concrete works and shall be homogeneous, clean, free from extraneous materials, clay lumps, organic matter, and alkaline and detrimental materials Coarse aggregate for structural concrete shall meet the requirements of AASHTO-M80 The Engineer request that coarse aggregate must be washed if it is unclean, or may reject any material if it does not comply with this Specification The Engineer shall approve the quarry from coarse aggregate before the material is delivered to the Site for construction Coarse aggregate shall meet the requirements of ASTM C33 The percentage of wear of the aggregate shall not be greater than 50 as determined by AASHTO-T96 Coarse aggregate shall withstand at least five cycles of immersion and drying in both sodium sulphate and magnesium sulphate solutions, as prescribed in the soundness test, and shall show an average weight loss of not more than 15 percent 6.4 Steel reinforcement: Steel of Đai Ngan, Quan Toan, Hong Bang, Hai Phong - Rebar from supplier Kyoei steel Viet Nam, follow the approved shop drawing and approved standard 6.5 Form oil or release agent for the formwork - Use sika separol for surface of formwork from supplier Sika Viet Nam Company Method statement 7.1 Construction procedure of precast piles The construction of precast concrete piles shall be implemented as the follows: - Fabricate, install bar steel - Install formwork - Concrete at batching plant and transport to the site - Concrete precast pile | Method statement of 40x40cm c o n c r e t e pile casting Lach Huyen Po rt Infrastructure Construction Project (Road and Bridge Portion) Contract Package No.6 - Open formwork and cure precast piles - Stock precast concrete piles 7.2 Chart of construction procedure and the point of inspection and acceptance Approval of workshop drawings Inspecting, accepting Inspecting, accepting Approval of materials fabricating, installing bar steel To install formwork Approval of mix concrete and mix plant - Acceptance of the work - Acceptance of the work Inspecting, accepting Concreting at mix plant and transpoting to the site - Acceptance of the work Inspecting, accepting To concrete precast pile - Acceptance of the work Inspecting, accepting To open formwork and curing precast piles - Acceptance of the work Inspecting, accepting To stockpile precast piles - Acceptance of the work | Method statement of 40x40cm c o n c r e t e pile casting Lach Huyen Po rt Infrastructure Construction Project (Road and Bridge Portion) Contract Package No.6 7.3 Chart of construction technology line 7.4 Construction requirements - Transporting and placing reinforcement All steel reinforcement shall be protected as far as practicable from mechanical injury or surface deterioration, from rusting or other causes from the time of shipment until it is placed Steel reinforcement stored on the site shall be laid on wood floors or sills suitably spaced so that no steel reinforcement shall be laid upon or come in contact | Method statement of 40x40cm c o n c r e t e pile casting ... Trình tự thi cơng cọc đúc sẵn 7.2 Sơ đồ trình tự thi cơng vấn đề kiểm tra nghiệm thu 7.3 Sơ ñồ dây chuyền công nghệ thi công 7.4 yêu cầu thi công 7.5 Thi công ván... công việc sau: + ðúc cọc bê tơng 40x40 cm Cơng tác cần có nhân công, thi? ??t bị, dụng cụ thi? ??t bị cần thi? ??t khác để hồn thành cơng việc thể vẽ Tổng hợp khối lượng công việc Bảng 1: Khối lượng công. .. STT Công việc I ðúc cọc bê tông 40x40 cm Cọc bê tông cốt thép 40x40 ðơn vị Khối lượng m 7.304 Ghi • Khối lượng vẽ Sơ đồ tổ chức trường đính kèm phụ lục Tổng hợp thi? ??t bị, máy móc nhân lực a) Thi? ??t