The roof of Xingzi County, Jiujiang, has been waterproof for 50 years, the roof has been waterproof and leakproofed, and the roof has been waterproof and leakproofed, The waterproof grade of the basement of the project is Grade II, and three layers of waterproof are adopted. The floor and exterior wall are rigid waterproof with C30S8 waterproof concrete, and two layers of 3mm thick external waterproof are applied SBS Type III modification asphalt Waterproof roll (Flexible waterproofing), the peripheral backfill adopts 2:8 lime soil three layers of waterproofing. In order to ensure that the basement waterproof is foolproof, we should take every waterproof seriously.
Compilation basis: Unified Standard for Construction Quality Acceptance of Building Engineering (GB 50300-2001), Code for Quality Acceptance of Underground Waterproofing Engineering (GB 50208-2002), Code for Construction Quality Acceptance of Concrete Structure Engineering (GB 50204-2002), Code for Construction Quality Acceptance of Building Ground Engineering (GB 50209-2002), Code for Indoor Environmental Pollution Control of Civil Building Engineering (GB 50325-2001) Great Wall of Building Structure cup Project Quality Review Standard (DBJ ／ T01-69-2003)
Basement plugging base requirements:
(1) Trench inspection: the foundation trench has passed the acceptance of the design, survey, owner, supervisor and other units, the base treatment meets the design requirements, and the concealed acceptance records have been handled
(2) Setting out and leveling: according to the measurement and positioning control line, set out the cushion sideline and the position line of Houjiang belt.
(3) Make elevation control points: according to the design elevation, use cement Make several elevation control points in the middle of the mortar.
Requirements for leak stopping materials in basement:
(1) The project adopts premixed concrete and pump pouring; When signing the concrete supply contract with the concrete company, the following technical requirements for waterproof concrete are proposed as part of the contract: a Concrete grade: C39S8b Slump: 100-140mmc Initial setting time: 4-6 h, d. Control requirements for alkali aggregate: large chloride ion content 0.2%, large alkali content 3.0 kg/m3.
(2) Before concrete mobilization, the mix proportion notice of concrete supplied by the concrete company, calculation sheet of chloride ion and alkali content, concrete setting curve table and other data shall be reviewed by the project chief engineer and supervision engineer before formal opening and pouring.
(3) Control the quality of concrete entering the site: after the concrete enters the site, check the time of concrete leaving the machine in a timely manner, make a record of the time of starting pouring and finishing pouring, and ensure that the concrete is poured before the initial setting. During pouring, the tester shall check the slump of each truck of concrete entering the site, make records, and withdraw the unqualified concrete from the site.
Quality acceptance of basement plugging
(1) Division of inspection lot: confirm the division of inspection lot and inspection quantity with the supervisor before acceptance. According to the specification requirements: spot check every 100m2 of exposed concrete area, 10m2 for each place, and no less than 3 places; Check all details.
(2) Acceptance: see the section Management Assurance System and Quality Management Measures for details.
(3) Inspection of technical data a. Concrete certificate, impermeability test report and alkali content report provided by the concrete company.
