Underground Engineering Waterproofing Technical Specification

Author: Editorial Department of the National People's Air Defense Office
Publisher: China Planning Press
Publication Date: 2001-11-01
Features: During the revision process of the "Technical Specification for Waterproofing of Underground Engineering," the revision team conducted extensive research and data collection. Based on summarizing the recent practical experience in waterproofing of underground engineering in China, referencing relevant international standards, and widely soliciting opinions from units across the country, the design and construction-related content of the "Technical Specification for Waterproofing of Underground Construction Projects" (GBJ208-83) and the "Technical Specification for Waterproofing of Underground Engineering" (GBJ108-87) was revised. The main revisions include: structurally, the chapters were reorganized and rewritten based on the approach of waterproofing for the main structure of underground engineering, waterproofing for detailed structures, and drainage; in the design content, the standardization of waterproofing levels was quantified, and corresponding waterproofing design plans were formulated for underground engineering using different construction methods; significant modifications were made to common waterproofing methods and materials, including the addition of "Plastic Waterproofing Board Waterproofing Layer," technical performance indicators for selected materials, and new regulations for selecting the impermeability grade of waterproofing concrete; in the content of waterproofing for detailed structures, the waterproofing methods for "Reserved Passage Joints" and "Pile Heads" were added, and relevant content was supplemented for the design and construction of expansion joints; the waterproofing methods for "Top-Down Construction" were also added. After revision, the original specification (GBJ108-87) with 10 chapters, 32 sections, and 179 articles has been expanded to 10 chapters, 36 sections, and 285 articles, which will play an important role in ensuring the quality of waterproofing for underground engineering.