Page 164 - Water Standards
P. 164

2) After being brushed, humans, animals and machinery are
                                forbidden to pass through.
                           4  During construction, fire protection equipment and necessary
                       appliances for labour protection shall be prepared to deal with fire haz⁃
                       ards and industrial accidents.
                       3   4   10  Filling of expansion joints shall meet the following require⁃
                       ments:
                           1  Before an expansion joint being filled, sundries and dust in
                       the joint shall be cleared up, and the joint wall shall be kept dry.
                           2  Expansion joints should be filled with elastic⁃plastic sealing
                       materials such as tar plastic daub, or the bottom part of the joint
                       should be filled with tar plastic daub and the top part with asphaltic
                       mortar. For expansion joints with special requirements, materials of
                       macromolecular water sealing tubes ( belts) should be employed,
                       and macromolecular water sealing tubes supplemented with special
                       rubber should be tamped in joints, and be squeezed in and connected
                       tightly with the joint wall. If the macromolecular water sealing belt is
                       buried in⁃situ at the anti⁃seepage structure, it shall be poured into the
                       joint wall according to design requirements.
                           3   For expansion joint filling, the joint shall be of regular
                       shape, qualified size , tight filling, and smooth surface.
                       3   4   11  Forebay construction shall meet the following requirements:
                           1  Excavation and treatment of the forebay shall comply with the
                       requirements of design and Sections 2   3 and 2   5 of this specification.
                           2  High slope excavation of the forebay shall be carried out ac⁃
                       cording to the requirements of Article 2   3   2 of this specification, and
                       protection treatment shall be employed to ensure stability and safety.
                           3  For the layout of a forebay on a hill slope, attention shall be
                       paid to preventing slope collapse, rock avalanches and storm flood e⁃
                       rosion.
                                                                            1 5 7
   159   160   161   162   163   164   165   166   167   168   169