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钢结构工程施工过程中柱脚安装问题和解决方法

发布时间:2015-11-3 9:38:29 浏览次数:570

(1)锚栓连接问题现象:柱脚锚栓未拧紧,垫板未与底板焊接;部分未露2~3个丝扣的锚栓。


措施:应采取焊接锚杆与螺帽;在化学锚栓外部,应加厚防火涂料与隔热处理,以防失火时影响锚固性能;应补测基础沉降观测资料。


(2)预埋件(锚栓)问题现象:整体或布局偏移;标高有误;丝扣未采取保护措施。直接造成钢柱底板螺栓孔不对位,造成丝扣长度不够。


措施:钢结构施工单位协同土建施工单位一起完成预埋件工作,混凝土浇捣之前。必须复核相关尺寸及固定牢固。


(3)锚栓不垂直现象:框架柱柱脚底板水平度差,锚栓不垂直,基础施工后预埋锚栓水平误差偏大。柱子安装后不在一条直线上,东倒西歪,使房屋外观很难看,给钢柱安装带来误差,结构受力受到影响,不符合施工验收规范要求。


措施:锚栓安装应坚持先将底板用下部调整螺栓调平,再用无收缩砂浆二次灌浆填实,国外此法施工。所以锚栓施工时,可采用出钢筋或者角钢等固定锚栓。焊成笼状,完善支撑,或采取其他一些有效措施,避免浇灌基础混凝土时锚栓移一位。



(1) anchor connection phenomenon: anchor bolt fastening plate and the bottom plate, without welding; not exposed bolt 2 to 3 threads.
Measures should be taken to welding bolt and nut; outside the chemical anchor bolt should be thickened fire - retardant coating and heat processing, in case of fire when the effect of anchorage performance; should supplement measurement foundation settlement observation data.
(2) embedded (anchor) phenomenon: the overall layout or offset; elevation error; thread did not take protective measures. The direct cause of steel column base plate bolt hole alignment, cause thread length is not enough.
Measures: steel structure construction unit construction units together to complete the collaborative work before concrete embedded parts. Must review the relevant dimensions and fixed.
(3) anchor bolt is not perpendicular to the phenomenon: the degree of frame column soleplate of column base level difference, anchor bolt is not vertical, after the construction of the foundation embedded anchor bolt horizontal error is too large. Pillars after installation not in a straight line, stagger, the house very ugly appearance, to the steel column installation errors, structure stress affected, does not meet the construction and acceptance specification requirements.
Measures of the anchor bolt installation should adhere to the first base plate with the lower part of the adjusting bolt, and then non shrinkage mortar grouting tamped abroad, this method works. So the anchor bolt construction, can use steel or angle fixed anchor bolt. Welded into a cage, perfect support, or take other effective measures to prevent the foundation of concrete when the anchor bolts to move a.



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