管道封锚技术交底(中英版)

1、Mombasa-Nairobi Standard Gauge Railway ProjectTechnical Disclosure Form技 术 交 底 书Construction Unit: Mtito Bridge Girders and Rail Sleepers Factory, CRBC. No.：MN-6-JS-20150127-01Name of project单位工程名称Laying base铺轨基地Part of Work工程部位T BeamT梁Prepared By编制单位Engineering department工程部Received By接收单位 The

2、 team for beam anchors梁场封锚作业队Item to be Disclosed交底项目Girder Anchor Sealing梁体封锚Time of Disclosure交底时间2015-01-27Disclosure content:交底内容：In order to prevent water and other harmful media from entering the girder and consequently corroding anchors and exposed steel strands, seal the girder anc

3、hors timely after completing duct grouting and confirming it is acceptable. Use C55 dry hard shrinkage-compensating concrete as the anchor sealing concrete. Except for the micro-expansion agent, use girder concrete materials for all concrete raw materials which shall be added with appropriate expans

4、ion agent with the amount determined by the lab; meanwhile, reduce water usage appropriately and the water-binder ratio to make the concrete slump meet the construction requirements. Perform water-proofing treatment with polyurethane waterproofing coating on anchors, anchor bearing plate surface and

5、 exposed steel strands prior to T-girder anchor sealing.为防止水分及其它有害介质侵入梁体，腐蚀锚具及外露钢绞线，待孔道压浆工作完毕并经检查合格后，及时进行梁体封锚。封锚混凝土采用C55干硬性补偿收缩混凝土，混凝土原材料除微膨胀剂外全部采用梁体混凝土材料，其中掺入适量膨胀剂，掺量由试验室确定，同时适当减少用水量，降低水胶比，使混凝土坍落度满足施工要求。T梁封锚前对锚具、锚垫板表面及外漏钢绞线用聚氨酯防水涂料进行防水处理。1、Roughening1、凿毛1）Roughen the anchor recess evenly after end

6、formwork removal but before anchor sealing until the smooth surface of old concrete is fully roughened.1）在封锚之前先进行锚穴凿毛，凿毛在拆除端模之后进行，要充分均匀，凿毛程度应凿除旧混凝土表面光面方可。2）Clean the anchor recess after roughening, and clean and wet it with water before pouring anchor sealing concrete.2）凿毛后锚穴须清理干净，封锚前灌注混凝土前用水清洗湿润。3）

7、Remove the mucilage on the anchor bearing plate surface and the anchor sealing mortar on the anchor ring prior to binding of anchor sealing reinforcement. In order to strengthen the connection between the subsequently poured concrete and the girder, roughen and clean the anchor recess at the girder

8、end, and remove other substances such as laitance and ash residue.3）绑扎封锚钢筋之前，先将锚垫板表面的粘浆和锚环上的封锚砂浆铲除干净，为加强后灌混凝土与梁体的连接，梁端锚穴处凿毛处理，并清洗干净，各处的浮浆、灰碴等杂物也要清理干净。2、Anchor Sealing Reinforcement2、封锚钢筋1）Process and spot-weld the reinforcement as per the design drawing and make sure precise dimensions so as to put

9、it into the anchor recess.1）钢筋按设计图加工点焊，尺寸准确，以便放入锚穴中。2）After roughening and cleaning, apply polyurethane waterproofing coating which can be directly used on the waterproofing course to the anchor periphery and the steel strand ends. Apply adequate coating to all exposed areas of the anchor evenly. In

10、 order to ensure the coating effect, the coating may extend to the part slight above the anchor bearing plate; however, its forbidden to apply the coating to the concrete.2)凿毛、清理工作后，在锚具的四周及钢绞线端部涂以直接用于防水层的聚氨酯防水涂料进行防水处理。用此涂料把锚具的全部外露面积范围内均匀足量地涂刷一次，为保证涂刷效果，可以刷到锚下垫板上面一部分，但严禁刷到各处混凝土上。3)In order to strengt

11、hen the connection between the subsequently poured concrete and the the girder end, install the bolt with thread at one end and a hook at the other end on the anchor bearing plate and make it integrate with the anchor sealing reinforcement. Place spacer bar meshes with a cover of not less than 35 mm

12、, and bind the meshes tightly with the short reinforcement installed on the anchor bearing plate.3)为加强后灌注混凝土与梁端的连接，在锚垫板上安装一端带螺纹一端带弯钩的螺栓，使之与封锚钢筋连为一体，放置钢筋网片，网片要有准确的保护层不得小于35mm，并且把钢筋网片与锚垫板上安装短钢筋绑扎牢固。3、Concreting3、混凝土的灌注Pour the anchor sealing concrete in several times to ensure compactness, and tamp th

13、e concrete with a reinforcement rod to ensure no hollowness or void; make sure the anchor sealing concrete is flush with the girder end face, and the faulting between the anchor sealing concrete and the girder concrete doesnt exceed 2 mm. If any gap occurs between the anchor sealing concrete and the

14、 old concrete due to plastic deformation, tamp the concrete into the gap with the old concrete before concrete setting to ensure compactness.封锚混凝土可分几次填塞，保证填塞密实，并用钢筋棍（橡胶锤）捣固密实，不能有空洞、不饱满现象；封锚混凝土要与梁端面平齐，封锚混凝土各处与梁体混凝土的错台不超过2mm。如有塑性变形造成其与原混凝土之间有缝隙的现象，必须在混凝土未凝固前把重新捣固于原混凝土之间达到密实效果。4、Concrete Curing4、混凝土的养护

15、Cure the anchor sealing concrete naturally with its surface covered and sealed by plastic films, just like the curing of girder concrete. Consolidate the curing within 12 h after initial setting to keep the concrete fully wet and avoid cracks between the anchor sealing concrete and the girder.封锚混凝土的养护与梁体混凝土相同，养护方法采用表面用塑料薄膜覆盖密封自然养护。在初凝后的12小时之内必须加强养护，充分保持混凝土湿润，防止封锚混凝土与梁体之间产生裂纹。5、Security assurances5、安全保证措施1）To enter