南水北调与水利科技2011，Vol.9Issue(6)：16-18,3.DOI:10.3724/SP.J.1201.2011.06016
南水北调中线干渠复合土工膜防渗施工接缝问题
Study on Seaming of Compound Geomembrane in Seepage Control Construction of Trunk Canal of SNWDP Mid-Route Scheme
蒋学行 1李翠玲 2李晓红 1吕军2
作者信息
- 1. 河南省水利科学研究院,郑州450003
- 2. 河南省水利工程安全技术重点试验室,郑州450003
- 折叠
摘要
Abstract
According to the design of South-to-North Water Diversion Project (SNWDP) Mid-Route Scheme, one layer of PE membrane and two layers of PE composite geomembrane formed of filament non-woven fabric (The thickness of PE membrane is 0. 3 mm, and the weight of the upper and lower layers of the filament non-woven geofabric is 150 g/m2. Respectively) are selected for the overall seepage control of the trunk canal. In the current constructions, seams of PE membrane are welded and seams of non-woven geofabric are sewed up. The results indicate that the tensile failure strength of the bonded seams is only 27% of the tensile strength of the parent materials. On the basis of a series of experimental studies, a new method is proposed for strengthening the seams of geomembrane. The new method uses the KS hot melt adhesive for binding the seams of PE membrane and non-woven geofabric and binding the seams of two layers of non-woven geofabric based on the welding of PE membrane. The tensile failure strength of the bonded seams could be up to 97% of tensile strength of parent materials according to the new method, which satisfies the technical requirement that the tensile strength of seams cannot be lower than 80% of the tensile strength of the parent materials as specified in the Standard for Application of Geosynthetics in Hydraulic and Hydro-power Engineering.关键词
渠道防渗/土工膜防渗/复合土工膜/土工膜铺设/接缝/KS热熔胶黏剂/土工膜黏接/PE土工膜Key words
Canal seepage control/Seepage control with geomembrane/ Composite geomembrane/ Geomembrane laying/ Seams/KS hot melt adhesive/Binding of geomembrane/ PE geomembrane分类
建筑与水利引用本文复制引用
蒋学行,李翠玲,李晓红,吕军..南水北调中线干渠复合土工膜防渗施工接缝问题[J].南水北调与水利科技,2011,9(6):16-18,3.
