水利水电技术2017，Vol.48Issue(1)：59-62,4.DOI:10.13928/j.cnki.wrahe.2017.01.011
压力隧洞复合预应力混凝土衬砌修补加固防渗结构计算分析及其施工工艺
Calculation and analysis on anti-seepage structure for repair and strengthening of lining of built-pressure tunnel with composite pre-stressed concrete and its construction technology
赵妍 1柴冬梅 2孙粤琳 1王荣鲁 1刘致彬1
作者信息
- 1. 中国水利水电科学研究院,北京 100038
- 2. 河北省水利工程局第一工程处,河北保定071051
- 折叠
摘要
Abstract
The composite pre-stressed concrete lining repair and strengthening anti-seepage scheme is that secondarily placing a thin layer of high-performance fiber concrete on the original concrete with thin steel plate arranged between the new and old concretes,and then forming a closed hollow annular space between the old concrete and the anti-seepage layer by means of making grooves on the surface of the old concrete.In accordance with the relevant demand,the uniformly-distributed compressive stress with a certain numerical value is artificially applied to the newly-placed thin concrete layer with cement grout through limited radial displacement.Through the analysis made on both the buckling failure of the newly-lined concrete and the joint stress of the old and new concretes,it is indicated that it is theoretically feasible for the larger tunnel diameter to select the external prestressing method for applying pre-stress to the new lining concrete layer.In this way,a part of internal water pressure can be shared,thus makes the scheme has the reinforcing and strengthening effect of the pre-stressed concrete as well as the composite anti-seepage function.The merit of this method is that not only the pre-stressing bar is omitted and the anti-seepage strengthening effect is obtained,but also the construction is simple and the loss of the flow cross-section is small.关键词
复合预应力混凝土衬砌/外加预应力法/修补加固/防渗/屈曲破坏/有限元分析/水泥砂浆Key words
composite pre-stressed concrete lining/external pre-stressing method, repair and strengthening/anti-seepage/buckling failure/finite element analysis/cement mortar分类
水利科学引用本文复制引用
赵妍,柴冬梅,孙粤琳,王荣鲁,刘致彬..压力隧洞复合预应力混凝土衬砌修补加固防渗结构计算分析及其施工工艺[J].水利水电技术,2017,48(1):59-62,4.
