《建筑工程质量控制先进适用技术手册(上)》包括地基基础工程、钢结构工程,从质量问题分析、先进适用技术、检测方法及目标、技术前景(包括国外技术)4个方面进行论述,优选先进适用技术解决当前在工程质量上存在的问题和通病,结合10项新技术,指出了工程质量控制行之有效的先进适用技术和检测方法,提出了先进适用技术的发展方向。《建筑工程质量控制先进适用技术手册(上)》可供建筑工程施工技术人员及监理人员使用,亦可供大中专院校相关专业师生参考。2.2.4预压地基技术预压法是在排水系统和加压系统的相互配合作用下,使地基土中的孔隙水排出,有效应力增加达到硬化固结的目的。其基本做法是:先将加固范围内的植被和表土清除,上铺砂垫层;然后垂直下插塑料排水板,砂垫层中横向布置排水管,用以改善加固地基的排水条件;再在砂垫层上铺设密封膜,用真空泵将密封膜以内的地基气压抽至80kPa以上。该方法加固时间长,抽真空处理范围有限,适用于工期要求较宽的淤泥或淤泥质土地基处理。流变特性很强的软黏土、泥炭土不宜采用此法。1.真空预压法(1)定义。真空预压法是在黏土层上铺设砂垫层,然后用薄膜密封砂垫层,用真空泵对砂垫层及砂井抽气,使地下水位降低,同时在大气压力作用下加速地基固结。(2)适用范围。适用于能在加固区形成(包括采取措施后形成)稳定负压边界条件的软土地基。(3)优点:①工期短,真空预压抽气时无须控制加荷速率,可一次加上而不必担心地基失稳,排水固结速度快,故可缩短工期。②不需大量预压材料,施工机具设备简单,且可重复使用,因而费用相对低廉。③加固效果显著,真空预压不仅沉降大、均匀,而且侧向位移向着预压区中心,不像堆载预压那样侧向挤出、隆起。所以真空预压的地基比堆载预压的地基密实度大,此法特别适用于加固超软地基。(4)机理。由于软土渗透性小,首先在需要加固的地基上设垂直排水通道,排水通道可采用袋装砂井或塑料排水板等,在其上铺设排水垫层,然后在垫层上铺设密封膜,并使其四周埋设于地下水位以下,使之与大气隔离。最后采用抽真空泵降低被加固地基内孔隙水压力,使其地基内有效应力增加,从而使土体得到加固。(5)施工:1)施工设备和材料。施工设备包括真空泵和一套膜内、膜外管路。要求真空设备具有效率高,能持续运转,重量轻,结构简单,便于维修等特点。密封材料一般采用聚氯乙烯薄膜或线性聚乙烯等专用薄膜。……(上)地基基础工程中国建筑第六工程局有限公司钢结构工程中建钢构有限公司北京城建集团有限责任公司(中)混凝土工程北京建工集团有限责任公司河南省建筑业协会河南省建设工程质量监督总站河南省第二建筑集团公司南京大地建设集团有限责任公司模架工程北京星河模板脚手架工程有限公司砌体工程陕西建工集团总公司陕西省建筑科学研究院(下)建筑防水工程山西建筑工程(集团)总公司保温工程北京住总集团有限责任公司地面工程中国新兴建设集团装饰装修工程深圳海外装饰工程有限公司机电安装工程中铁建工集团有限公司中建工业设备安装有限公司
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paperback. Condition: New. Ship out in 2 business day, And Fast shipping, Free Tracking number will be provided after the shipment.Paperback. Pub Date: November 2012 Pages: 219 Language: Chinese in Publisher: China Building Industry Press. construction engineering quality control of advanced and applicable technologies Manual (Vol.1) covers foundations. steel works. from the quality of analysis . advanced and applicable technologies. detection methods and objectives. technical prospects (including foreign technology) discusses the four aspects. preferably the application of advanced technology to solve the current problems exist on the quality of the project and a common problem. combined with the 10 new technologies. and pointed out that the project quality control effective the application of advanced technology and detection methods. the direction of the development of advanced and applicable technologies. Construction Quality Control in the application of advanced technologies Manual (Vol.1) available for building construction technicians and supervisory personnel. reference is also available for colleges and professional teachers. Steel Co. Ltd. Beijing Urban Construction Group Co. Ltd. (Vol.2) Concrete Engineering Beijing Construction Engineering Group Co. Ltd. Henan Province building was built in the foundation works of Contents: (Vol.1) China State Construction Engineering Bureau Ltd. Steel Structure Engineering Industry Association. Henan Province Construction Engineering Quality Supervision Station of Henan Province Construction Group Corporation Nanjing Dadi Construction Group Co. Ltd. moldbase Engineering Beijing Galaxy Formwork and Scaffolding Engineering Co. Ltd. masonry works Shaanxi Construction Engineering Group Corporation Shaanxi Provincial Academy of Building Research ( Vol.2) waterproof construction projects Shanxi Construction Engineering (Group) Corporation the insulation works live in total Group LLC ground engineering emerging China Construction Group Decoration Engineering Shenzhen Overseas Decoration Engineering Co. Ltd. in the construction of China Railway Construction Engineering Group Co. electrical and mechanical installation Industrial Equipment Installation Co. Ltd.Four Satisfaction guaranteed,or money back. Seller Inventory # NE045717
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