橋梁伸縮縫安裝前期的施工準(zhǔn)備工作

　　1.伸縮縫預(yù)留槽的設(shè)置:橋面鋪裝混凝土施工前，伸縮縫應(yīng)用塑料泡沫板填實(shí)，防止混凝土等廢棄物掉入，影響伸縮裝置的性能；橋面鋪裝施工后，伸縮縫預(yù)留槽口應(yīng)用低標(biāo)號砂漿或混凝土填充至與橋面齊平，以保證表面瀝青混凝土鋪裝的平整度，防止施工時(shí)預(yù)留鋼筋受壓變形，影響伸縮裝置的安裝。

　　2.伸縮縫預(yù)留槽的開挖:瀝青混凝土上層完成后，即可進(jìn)行伸縮縫開槽。首先，根據(jù)設(shè)計(jì)寬度，在表層放出切割邊緣標(biāo)記?？梢韵扔盟驖癖韺?，然后用膠帶紙沿切割標(biāo)線在伸縮縫兩側(cè)貼上塑料薄膜，再蓋上一層硬塑料編織布，防止切割過程中污染路面。技術(shù)工人操作切割機(jī)沿標(biāo)準(zhǔn)線切割，保證切割縫整齊順直。切割完成后，手動去除表面混合物。對于剩余凹槽內(nèi)的填充物，可先用風(fēng)鎬將其打碎，然后用人工清除。 and care should be taken to prevent the corner of the slit from being damaged. Check whether the cement concrete under the asphalt concrete in the tank is dense. If it is suspended, it should be cut again along the standard line until the inner walls on both sides of the tank are flat and dense. The concrete surface in the tank is treated by manual roughening. Check whether the reserved reinforcement in the groove meets the design and installation requirements, especially the reserved reinforcement at the plate end, which is deformed during the prefabrication, transportation and installation of the beam and slab, adjust the reserved reinforcement that does not meet the requirements, and remove the concrete laitance attached to the surface of the reinforcement. Clean up the residue in the tank and check whether the plastic foam board in the seam is complete and continuous, 以及縫寬是否符合設(shè)計(jì)要求。預(yù)留槽可以用水槍徹底清洗干凈。

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