摘要
为研究建筑物基础扰动条件下的框架结构应力反应,构建建筑物基础的等效有限元模型,并对不加固直接掘进通过、隧道范围5 m内的帷幕注浆加固、针对建筑物深桩基的加强劈裂注浆加固等方案进行CAE有限元分析。分析发现,采用加强劈裂注浆加固建筑物基础并配合隧道掘进过程中的帷幕注浆方案,可以使建筑物基础的最大应变控制在21.8 mm/m,远小于最大容许应变值29.3 mm/m,且小于基于此值推算出的建筑物基础结构危险应变值25.0 mm/m。因此,该方案可适用于该建筑基础的加固需求。
To study the frame structure stress response under the condition of the building foundation disturbance, the equivalent finite element model of the building foundation is established, and the CAE finite element analysis is carried out for the schemes such as direct tunneling without reinforcement, curtain grouting reinforcement within 5 m of the tunnel, and strengthening splitting grouting reinforcement for the deep pile foundation of the building. It is found that, by strengthening splitting grouting combined with curtain grouting scheme in the process of tunnel excavation, the maximum strain of the building foundation can be controlled at 21.8 mm/m which is far less than the maximum allowable strain value of 29.3 mm/m, and less than the dangerous strain value 25.0 mm/m of building foundation calculated based on this value. Therefore, the scheme can be applied to the reinforcement of the building foundation.
作者
张晓禹
ZHANG Xiaoyu(China Con structi on Sec ond En gineeri ng Divisi on Corp.,Ltd.Southwest Bran ch,Chongqing 400020,China)
出处
《建筑施工》
2020年第12期2351-2354,共4页
Building Construction
关键词
基础沉降
框架结构
有限元分析
加固方案
foundation settlement
frame structure
finite element analysis
reinforcement scheme
