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1、ndoverallleadershipresponsibilityforsafety.AdministrativeDeputyiswithinthescopeoftheirrespectiveresponsibilitiesatvariouslevelsofsecurityresponsibility,inchargeofsecurityworkinthecontextofleadership,responsibletotheChief.Fifthopenpitproductionsafetyaccidentinve
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4、ty,safetyisthecompetitiveness"awareness,tomakesafetywork.Seventhminingtradeunionorganizationaccordingtolawtheworkerstoparticipateintheworksafetyofdemocraticmanagementanddemocraticsupervision,safeguardworkers'legitimaterightsandinterestsinrespectofsafety.Persona
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6、lesandregulationsforcoalproduction,institutionalizationan現(xiàn)澆連續(xù)梁鋼管支架的計算及施工 扣件式鋼管腳手架工程是橋梁連續(xù)梁施工中常用的且十分重要的臨時設(shè)施,這項工作的優(yōu)劣將直接影響工程的質(zhì)量、安全、速度、效率等??奂戒摴苤Ъ馨惭b,拆卸比較方便,在荷載作用下穩(wěn)定性較好?,F(xiàn)以2005年合肥當(dāng)涂路現(xiàn)澆連續(xù)剛構(gòu)扣件式鋼管支架的計算施工為例,淺述一下我們的應(yīng)用。一、工程概述 該橋孔跨布置為:1-8m框架+(20.3+2×17.8+20.3)m連續(xù)剛架,梁寬7m,梁厚
7、1m,本橋現(xiàn)澆梁支架采用普通鋼管腳手架,350工字鋼梁做門洞梁,適用于跨度6m的門洞搭設(shè),以滿足既有當(dāng)涂路交通的正常運營。二、滿堂腳手架的布置 該橋陸地上除門洞外其余梁體澆筑施工均采用滿堂支架。支架材料為普通鋼管腳手架,支架基礎(chǔ)必須經(jīng)碾壓并硬化達到要求后,再搭設(shè)支架。地面進行硬化方法為:場地平整后用壓路機壓實,先鋪10㎝碎石墊層,后鋪C15砼15㎝(軟弱地段換填墊片石和灰土)。支架間距順橋向0.6m,橫橋向0.6m,步長120cm.采用普通腳手鋼管滿堂支架,間距60×60㎝,步距120㎝.鋼管上下均采用可調(diào)調(diào)節(jié)支撐
8、,支架底托下延橫橋向墊槽鋼,所有支架應(yīng)依據(jù)搭設(shè)高度設(shè)置剪刀撐。 因為滿堂支架是整個梁體最重要的受力體系,所以鋼管支撐的桿件有銹蝕,彎曲、壓扁或有裂縫的嚴(yán)禁使用;使用的扣件有脆裂、變形、滑絲的扣件禁止使用,扣件活動部位應(yīng)能靈活轉(zhuǎn)動,當(dāng)扣件夾緊鋼管時,開口處的最小距離應(yīng)不小于5mm.三、支架檢算如下: 1、模板支架檢算(按一米梁長計算,鋼管