【判断题】
锚杆可用钢筋或钢丝绳,一端固定在桩顶的腰梁(导梁)上,另一端固定在锚碇上,其长度应保证锚碇在土的破坏棱体以外。
A. 对
B. 错
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挡土墙的作用主要用来维护土体边坡的稳定,防止坡体的滑移和土边坡的坍塌。
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基坑(槽)施工中一般可不防止地面水流入坑沟内。
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人工开挖土方时,两个人操作间距应保持1~2m,并应自上而下逐层挖掘。
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组合钢模板及其配件的制作质量应符合现行国家标准《组合钢模板技术规范》(GBJ214-89)的规定。
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组合钢模板及其配件的制作质量应符合设计要求。
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安装钢筋模板组合体时,吊索应按模板设计规定的吊点位置绑扎。
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在下层楼板上支模板时无需考虑楼板的承载能力。
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B. 错
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计算模板及支架结构的强度、稳定性和连接时,应采用荷载设计值。
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荷载设计值为荷载的标准值乘以荷载分项系数。
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计算模板的承载能力极限状态,应采用荷载效应的基本组合。
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遇四级及其以上风力应停止一切吊运作业。
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模板及其支架应具有足够的承载能力、刚度和稳定性,应能可靠的承受新浇筑混凝土的自重,侧压力和施工过程中所产生的荷载以及风荷载。
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模板和支架安装在地基土上时,应加设垫板,垫板应有足够强度和支撑面积, 且应中心承载,地基土应坚实,并有排水设施。
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当拆除工程对周围相邻建筑安全可能产生危险时,必须采取相应保护措施,必要时应对建筑内的人员进行撤离安置。
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当拆除工程对周围相邻建筑安全可能产生危险时,必须采取相应保护措施,建筑内的人员不必撤离安置。
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在拆除作业前,施工单位应检查建筑内各类管线情况,确认全部切断后方可施工。
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在拆除作业前,施工单位应检查建筑内各类管线情况,不需确认全部切断后方可施工。
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拆除工程施工区应设置硬质围挡,围挡高度不应低于1.0m,非施工人员不得进入施工区。
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拆除工程施工区应设置硬质围挡,围挡高度不应低于1.8m,非施工人员可以进入施工区。
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当临街的被拆除建筑与交通道路的安全距离不能满足要求时,必须采取相应的安全隔离措施。
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【判断题】
当临街的被拆除建筑与交通道路的安全距离不能满足要求时,不一定采取相应的安全隔离措施。
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在拆除工程作业中,发现不明物体,应停止施工,不用采取相应的应急措施,保护现场并应及时向有关部门报告。
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拆除管道及容器时,不用查清其残留物的种类、化学性质,采取相应措施后,方可进行拆除施工。
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爆破拆除工程应根据周围环境条件、拆除对象类别、爆破规模,分为A、B、C三级。
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爆破拆除工程应根据周围环境条件、拆除对象类别、爆破规模,不用分为A、B、C三级。
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拆除工程施工过程中,当发生重大险情或生产安全事故时,应及时排除险情、组织抢救、保护事故现场,并向有关部门报告。
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