Page 204 - Water Standards
P. 204

shall not be treated by scalding. When the bolts have been uniformly tightened,
                   their end sections shall be at least 8   0mm lower than the rubber free surface.
                 6) The rubber seal surface shall be smooth and straight. Rubber⁃plastic compound
                   seals shall be transported flat and shall not be rolled or folded. The maximum de⁃
                   viation in thickness is ±1   0mm. The allowable error of other section sizes is 2%
                   of the design size.
                 7) The rubber seal joints should be cured by vulcanisation and there shall be no mis⁃
                   alignment, unevenness or porosity around the joints. If adhesives are used at nor⁃
                   mal temperature, the tensile strength shall be no less than 85% of the rubber seal
                   given in GB 10706.
                 8 ) When the rubber seals have been installed, the maximum deviation of the
                   distance between water stop centers on two sides and the distance from the top
                   water stop to the bottom water stop  s base is ±3   0mm. The flatness tolerance of
                   the water stop surface is 2   0mm. When the sluice gates are working, the amount
                   of rubber seal compression shall meet the requirements of the design drawings.
                   Light penetration inspection or water retaining tests shall also be conducted.
                 9) Static balance tests shall be done for plane sluice gates. The test method is as fol⁃
                   lows: lift the sluice gate above the ground by 100mm, measure the tilt displace⁃
                   ment of the left side, right side, and the upstream and downstream sides using
                   the center of an idler wheel or slideway. Generally, the tilt displacement of a sin⁃
                   gle hanging point plane gate shall not exceed 1/ 1000 of its height and shall also be
                   no larger than 8   0mm. The tilt displacement of a plane sprocket gate shall not ex⁃
                   ceed 1 / 1500 of its height and shall be no larger than 3   0mm. If the tilt displace⁃
                   ment exceeds the requirements above, counterbalance weights shall be added to
                   the gate to balance the weight  
           4   1   3  Tainter gate installation shall meet the following requirements:
               1  Hinged bearing installation tolerance or maximum deviation of cylindrical hinges,
           spherical hinges and other types of supporting hinges shall meet the requirements of
           Table 4   1   3  











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