某中学在建图书馆地下室外墙裂缝检测鉴定

DETECTION AND APPRAISAL OF CRACKS IN THE BASEMENT WALL OF A MIDDLE SCHOOL LIBRARY UNDER CONSTRUCTION

近几年,有不少地下室外墙在浇筑成型过程中,由于受外墙长度较大且两端又有端柱约束、内外温度差、施工养护不及时、拆模过早等因素的影响,使得很多工程的地下室外墙在浇筑拆模后一段时间即出现了开裂现象。裂缝多呈现竖向等间距、缝长接近墙高、上下两端逐渐变细直至消失等特征。现就某中学在建图书馆为背景,介绍该类地下室外墙裂缝的检测鉴定全过程。通过全面的调查检测,综合分析该类裂缝的成因,并根据调查检测结果对开裂墙体安全性给予鉴定结论。

In recent years,during the pouring process of basement exterior walls in many ongoing projects,due to the large length of the exterior walls and the constraint of end columns at both ends,temperature difference between inside and outside,untimely construction and maintenance,or premature demoulding,many basement exterior walls have cracked after pouring and demoulding.Cracks often exhibit characteristics such as vertical equal spacing,seam length approaching wall height,and gradually thinning and disappearing at both ends.Based on the actual construction of a library under construction in a certain middle school,this article introduces the entire process of detecting and identifying cracks on the exterior walls of the basement.Through comprehensive investigation and testing,comprehensively analyze the causes of such cracks,and based on the investigation and testing results,provide an appraisal conclusion on the safety of cracked walls.