沙朗特大橋鉆孔樁基礎(chǔ)鋼筋籠制作及安裝技術(shù)交底.doc

1、鋼筋的存放
鋼筋必須按照不同的等級、牌號、規(guī)格分批堆放，不得混雜，并且設(shè)立識別標(biāo)志。鋼筋在存放過程中，應(yīng)避免銹蝕和污染，鋼筋露天堆放時，應(yīng)墊高并加覆蓋。
2、鋼筋籠制作前質(zhì)量檢驗(yàn)
（1）鋼筋進(jìn)場后，應(yīng)做拉伸（抗拉強(qiáng)度、屈服點(diǎn)、伸長率）和冷彎試驗(yàn)。
（2）鋼筋在加工之前，表面必須潔凈、無油漬、漆污、水泥漿、鐵銹等。
（3）鋼筋應(yīng)平直，無局部彎曲。
（4）加工后的鋼筋，表面不應(yīng)有削弱鋼筋截面的傷痕。
（5）成盤的鋼筋和彎曲的鋼筋必須調(diào)直。用冷拉法矯直鋼筋時，I級鋼筋的冷拉率不大于2％，II級鋼筋的冷拉率不大于1％。
3、鋼筋籠制作要求
（1）鋼筋焊接前，必須首先做鋼筋焊接試驗(yàn)，合格后方可正式施焊，焊工必須持證上崗施工。
（2）設(shè)置鋼筋籠加工制作的工作平臺，加工場地和制作平臺必須平整。制作一圓形的加強(qiáng)筋作業(yè)盤，統(tǒng)一制作鋼筋籠的加強(qiáng)箍筋，保證鋼筋籠圓形一致。
（3）鋼筋籠根據(jù)設(shè)計長度分節(jié)制作安裝，根據(jù)鋼筋
1, steel storage
Steel must be in accordance with the different grades, grades, specifications stacked in groups, not mixed, and the establishment of identification. Reinforced during storage, corrosion and pollution should be avoided, bar open pile should be padded and increase coverage.
2, pre-production quality inspection reinforcement cage
(1) reinforcement approach, it should do stretching (tensile strength, yield point, elongation) and the cold test.
(2) before the steel in the process, the surface must be clean, no grease, paint, dirt and water, mud, rust, etc..
(3) bar should be straight, no local bending.
(4) processed steel, the surface should not weaken the steel cross-section scars.
(5) into a plate of steel and bending the steel to be straightened. Rafah with cold steel when straightening, I cold-drawn steel bar rate level is not more than 2%, II grade cold drawn steel bar rate of less than 1%.
3, steel cage production requirements
(1) steel before welding, steel welding test must be done first, before they come after passing the weld, welders must hold relevant certificates construction.
(2) manufacture of reinforced cage work platforms, processing facilities and production platforms must be formed. Production of a circular plate stiffener operations, the strengthening of unity of stirrup reinforcement cage made to ensure the consistent reinforcement cage round.
(3) the length of reinforcement cage section according to the design manufacture and installation, according to steel
 

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