BAÙO CAÙO QUAN TRAÉC CHU KYØ 1 A BAÙO CAÙO QUAN TRAÉC LUÙN CHU KYØ 1: 1. THIEÁT BÒ ÑO : Trong quaù trình quan traéc luùn chuùng toâi söû duïng caùc thieát bò sau: Maùy NA2 (Haõng Leica Thuïy Só saûn xuaát ). Boä ñoïc soá chính xaùc Micrometre (Haõng Leica Thuïy Só saûn xuaát). Caëp mia Invar chuyeân duøng. Thöôùc theùp vaø caùc thieát bò hoã trôï khaùc vv… 2. PHÖÔNG PHAÙP ÑO : Trong thöïc teá coù nhieàu phöông phaùp quan traéc ñoä luùn coâng trình. Trong ñoù phöông phaùp phoå bieán nhaát ñeå quan traéc ñoä luùn coâng trình xaây döïng daân duïng laø ño cao hình hoïc chính xaùc khoaûng caùch ngaén. Ñoái vôùi coâng trình Caàu Caù Treâ Lôùn, chuùng toâi thieát keá sô ñoà löôùi vaø quan traéc theo phöông phaùp ño cao hình hoïc chính xaùc khoaûng caùch ngaén. Ñieàu naøy phuø hôïp theo yeâu caàu TCXDVN 2712002. Sô ñoà vaø chöông trình ño ñöôïc thoáng nhaát cho taát caû caùc chu kì quan traéc. Ñoàng thôøi chuùng toâi chæ söû duïng moät boä maùy moùc duïng cuï coá ñònh, cuøng ngöôøi ño vaø coá gaéng ño trong nhöõng ñieàu kieän töông töï nhau trong caùc chu kyø nhaèm giaûm aûnh höôûng cuûa caùc nguoàn sai soá heä thoáng ñoái vôùi keát quaû ño. Theo TCXDVN 2712002, chuùng toâi ñaõ tieán haønh ño caáp II ñeå xaùc ñònh ñoä luùn cuûa coâng trình, trong quaù trình ño chuùng toâi chia laøm nhieàu voøng nhoû ñeå ñaùnh giaù sai soá kheùp voøng cuõng nhö ñoä chính xaùc cuûa trò ño.
Noi Bai-Lao Cai Highway Project Package A3: Km48+360 to Km80+000 Method statement for Soft soil treatment by PVD POSA3-MS- PVD-A2-EN GeneraL - After studying the design documents drawing soft ground handling at Km48+420 ~ Km48+512.2, construction units were examined, survey the actual economic situation, social and geographical shape, measuring water current, the geological situation at the construction site Equipments and manpower - List of construction equipments: No Equipment Bulldozer Excavator Vibration roller Dump truck Dump truck Pump Geodetic equipments Sewing machine for geo-textile fabric Prefabricated vertical drains machine Type 110~140 HP 0.7~1.6 m3 16~ 36 ton 12~23 ton 8~10 ton 2~4 inches Leveler, Total station Quantity 2 5 2 Specialized Materials 3.1 Borrow materials (Used for access road embankment and fine sand layer filling) Borrow material is categorized as follows: Borrow material for sub grade Borrow material for road and counterweight embankment Borrow material for fine sand layer(using black sand of Red River) The Contractor shall use the suitable material from borrow pits for constructing embankment, backfill, sub grade, shoulders, cohesive slope and other parts of the work as shown on the Drawings, or as directed by the Engineer Borrow will be resorted to only when shown on the Drawings or directed by the main Contractor, and then only from approved sources In supplement to the above referred “Schedule of Materials” the Contractor shall submit samples of materials corresponding to the lots for testing The Contractor shall permanently monitor the schedule for Quality control, testing and acceptance, providing to the Consultants consistent reports as required in Specification Section 01800 “Contractor's Quality Control” Dated: 20th Jun 2012: Version A2 -1- Noi Bai-Lao Cai Highway Project Package A3: Km48+360 to Km80+000 Method statement for Soft soil treatment by PVD POSA3-MS- PVD-A2-EN 3.2 coarse SAND BLANKET (Using yellow sand of Lo River) - Material must be submitted to Engineer for approval and tested in laboratory under Engineer’s supervision before being used for embankment - Testing frequency in construction progress is according to Article 2.4.1 “Coarse Sand Blanket” in Section 03500 “Soft soil treatment measure” in General Technical Demands, details as follows: + Testing and doing experiment to each material source needed to be approved + Materials gathered on site: Every 500m3, all testing criteria shall be checked, except for Compaction Test AASHTO T180 which is applied with frequency of 1000m3 - Test result of sand must satisfy demands in Article 2.4.1(b) of Section 03500 “Soft soil treatment measure” – General Technical Demands and following demands Technical demands No Norm name according to 22TCN 262-2000 Value Sand for sand blanket 1.1 Organic content 0.25mm >50% 1.3 Particles with a diameter