Page 152 - Water Standards
P. 152

impoundment, joint grouting shall be carried out when the reservoir
                       water level is lower than the grouting elevation.
                           3  Technical requirements of contact grouting of concrete dams
                       shall be enforced according to the provisions of SL 62  
                       3   3   8  Foundation treatment of concrete dams shall meet the require⁃
                       ments of design and Article 2   3   2 and Section 2   5 in this
                       specification. A template type of concrete dam may be chosen
                       according to the requirements of Article 2   7   1 in this specification.
                       3   3   9  Concrete sluice⁃type dams may be constructed referring to the
                       requirements in SL 27  
                       3   3   10  Construction quality control shall meet the following require⁃
                       ments:
                           1  A system of quality management and assurance shall be es⁃
                       tablished. Relevant technicians, and necessary checking and testing
                       equipment shall be allocated, and the necessary system of technical
                       management and quality control shall be established according to the
                       project scale, and the requirements of quality control and manage⁃
                       ment.
                           2  Every major key link of raw material, mix proportion and
                       construction of concrete and concrete quality after hardening shall be
                       controlled and inspected.
                           3  Quality sampling inspection of raw materials shall meet the
                       requirements of Article 2   7   22 in this specification. Any kind of raw
                       material for concrete shall not be utilized until it passes inspection.
                           4  The concrete mix proportion shall be determined by tests,
                       and satisfy the requirements of technical index and construction. It
                       may not be employed until it are examined and approved by the super⁃
                       vising engineer.
                           5  Measuring instruments of concrete mixing station shall be pe⁃
                       riodically tested and adjusted, and be randomly inspected at any time
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