超长混凝土底板“抗裂”新技术及应用  

New Technology and Application of Crack Resistance of Super-long Concrete Floor

作　　者：张绪强 ZHANG Xuqiang(Guangzhou WisTech Investment Development Co.,Ltd.,Guangzhou 510700,China)

机构地区：[1]广州智科投资开发有限公司,广州510700

出　　处：《广东土木与建筑》2023年第2期61-63,100,共4页Guangdong Architecture Civil Engineering

摘　　要：民用与工业建筑地下空间超长混凝土底板结构容易出现裂缝导致结构渗水、漏水是建筑行业的一个难题。为了解决这个难题,提出两种构筑物超长底板抗裂关键技术:通过减少基岩对底板的约束消除应力关键技术;通过增设变形沟诱导裂缝释放应力关键技术。采用试验得出的底板摩擦系数,通过YJK和MIDAS对超长混凝土底板结构进行温度变化模拟计算得到采用抗裂技术前后规律,并通过实际工程验证。研究提出的两种抗裂关键技术,可以有效地降低或释放底板混凝土水化过程中产生的收缩应力,从而达到减少超长混凝土底板的裂缝,提高混凝土结构工程质量的目的,对建筑结构工程抗裂设计及施工有着重要的指导作用。It is a difficult problem in the construction industry that the super-length concrete floor structure in the underground space of civil and industrial buildings is prone to crack and lead to structural water seepage and leakage. In order to solve this problem,proposes two key anti crack technologies of super-length floor of structures:the key technology of eliminating stress by reducing the constraint of bedrock on the floor;It is a key technology to induce crack and release stress by adding deformation groove. Based on the friction coefficient of the base plate obtained from the test,the temperature change simulation calculation of the super-length concrete base plate structure is carried out by YJK and Midas to obtain the laws before and after the anti crack technology is adopted,and it is verified by the actual project. The two key anti-crack technologies proposed in this study can effectively reduce or release the shrinkage stress generated in the hydration process of the bottom slab concrete,so as to reduce the cracks of the super-length concrete bottom slab and improve the quality of the concrete structure engineering. It has an important guiding role in the anti crack design and construction of the building structure engineering.

关 键 词：超长混凝土底板 抗裂 消除应力 释放应力 变形沟 

分 类 号：TU375.2[建筑科学—结构工程]