箱涵混凝土技術(shù)交底.doc

交底內(nèi)容：
1. 本箱涵（K9+535.284）的結(jié)構(gòu)砼為C30砼，抗?jié)B標(biāo)號(hào)為S6，墊層為C10素砼。
2. 混凝土的保護(hù)層厚度：底板為40mm，墻、頂板為35mm；
3. 混凝土配制：本工程采用商品混凝土，混凝土配置嚴(yán)格按設(shè)計(jì)要求的技術(shù)指針確定。混凝土配合比必須經(jīng)試驗(yàn)確定，水泥的選用要減小地下水對(duì)鋼筋及混凝土的腐蝕。
4. 混凝土澆注前對(duì)模板、鋼筋、端頭止水帶等進(jìn)行檢查，清除模板內(nèi)雜物，隱蔽驗(yàn)收合格后，方可灌注。
5. 混凝土澆注過程中隨時(shí)觀測(cè)模板、支架、鋼筋等情況，發(fā)現(xiàn)問題，及時(shí)處理。
6. 混凝土的澆注：本工程采用泵送商品混凝土，混凝土到達(dá)現(xiàn)場(chǎng)后，材料試驗(yàn)員核準(zhǔn)混凝土發(fā)車時(shí)間，混凝土的品種、強(qiáng)度等級(jí)，混凝土坍落度是否在規(guī)定的范圍內(nèi)，并隨機(jī)取樣測(cè)定和做試塊，嚴(yán)格把好混凝土的質(zhì)量關(guān)。不同部分混凝土施工分述如下：
(1).  底板混凝土澆注：
A.  底板厚400mm，混凝土強(qiáng)度等級(jí)為防水C30、抗?jié)B等級(jí)為S6。在底
Cards on the table contents:
1. The box culvert (K9 +535.284) the structure of concrete for the C30 concrete, impermeability grade for the S6, bedding factors for the C10 concrete.
2. Concrete cover thickness: bottom is 40mm, wall, roof is 35mm;
3. Concrete Mixing: This project uses concrete, concrete configuration in strict accordance with design requirements of the technical indicators to determine. Concrete mix to be determined by the test, the choice of cement to reduce water corrosion on steel and concrete.
4. Template before pouring concrete, steel, end of the first water stop, etc. to inspect, remove the template debris, hidden acceptance only after the infusion.
5. Concrete pouring at any time during the observation template, frame, steel, etc., identify problems and timely treatment.
6. Concrete casting: The use of premixed concrete construction, concrete arrived at the scene, material testing of concrete members approved departure time, the variety of concrete strength grade, whether concrete slump within the limits prescribed, and random sample testing and do try block, a strict standard of concrete quality. Different parts of the concrete construction are as follows:
(1). Bottom Pouring Concrete:
A. floor thickness 400mm, waterproof concrete strength grade C30, impermeability grade S6. In the end
 

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