Standard No.:	GB 50208-2011
English Name:	Code for acceptance of construction quality of underground waterproof
Chinese Name:	地下防水工程质量验收规范
Professional Classification:	GB    National Standard
Issued by:	MOHURD
Issued on:	2011-04-02
Implemented on:	2012-10-1
Status:	valid
Superseding:	GB 50208-2002 Code for Acceptance of Construction Quality of Underground Waterproof
Language:	English
File Format:	PDF
Word Count:	26000 words
Price(USD):	140.0
Delivery:	via email in 1 business day

1.0.1 This code was formulated with a view to strengthening the quality management of construction engineering, unifying the quality acceptance of underground waterproof projects and guaranteeing the project quality. 1.0.2 This code is applicable to the acceptance of construction quality of such underground waterproof projects as building constructions, protection projects, municipal tunnels and underground railways. 1.0.3 The new technologies adopted in the underground waterproof projects must pass the appraisal and evaluation of scientific and technical achievement assessment or the appraisal of new products and new technologies. Before applying the new technology, the new or firstly-adopted construction process shall be evaluated, and the corresponding technical standards shall be formulated. 1.0.4 The construction of underground waterproof projects shall meet current provisions of the State on safety and labor protection and environmental protection. 1.0.5 In addition to this code, the acceptance of construction quality of underground waterproof projects still shall be in accordance with those specified in the current relevant standards of the State.

1 General Provisions 2 Terms 3 Basic Requirements 4 Waterproof Projects of Major Structure 4.1 Waterproof Concrete 4.2 Cement Mortar Waterproof Layer 4.3 Membrane Waterproof Layer 4.4 Coating Waterproof Layer 4.5 Plastic Sheet Waterproof Layer 4.6 Metal Sheet Waterproof Layer 4.7 Bentonite Waterproof Layer 5 Waterproof Projects of Detail Structure 5.1 Construction Joint 5.2 Deformation crack 5.3 Post Poured Band 5.4 Through-wall Pipes 5.5 Embedded Parts 5.6 Prepared Channel Joints 5.7 Pile head 5.8 Orifice 5.9 Pits and Ponds 6 Waterproof Projects of Special Applications 6.1 Bolt-shotcrete Support 6.2 Underground Diaphragm Wall 6.3 Shield Tunnelling 6.4 Open Caisson 6.5 Inverted Construction 7 Drainage Projects 7.1 Osmotic Drainage, Blind Drainage 7.2 Tunnel drainage, Adit Drainage 7.3 Plastic Sheet Drainage 8 Grouting Projects 8.1 Pre-grouting and Post-grouting 8.2 Grouting of Structural Cracks 9 Quality Acceptance of Sub-division Projects Appendix A Quality Index of Waterproof Materials Used for Underground Projects Appendix B Standards of Waterproof Materials for Underground Projects and Site Sampling Inspection Appendix C Seepage Investigation and Measurement for Underground Projects Appendix D Bonding Quality Testing of Joints between Waterproof Membranes Explanation of Wording in This Code List of Quoted Standards