| Hydraulic concrete structure cracking has not been solved at all times。The problem is always in trouble for engineering field。Crack appearance and existing will be disadvantages in structure integrity and safety。Once concrete cracks, the strcucture integrity will be in difficulty to mend and restore。Therefore, hydraulic concrete crack will mainly be prevented。In view of present research results, mass concrete crack mainly will be restricted to its physical characteristics, construction maintenance, inside and outside difference in temperature, etc。In variety of structure style and restriction conditions, the situation of structure crack is complex。Meanwhile, effect of construction scheme, water flow, sunshine, cold weather, and various seasons, etc, cracks will appear at any time。Therefore, management and implement of Xiaoyunfeng Dam concrete temperature control on base of the frame of quality management system, which owner was responsible for the project, design ensured the works, construction guaranteed, construcion supervision was for speciality, experts gave double check, and the government monitored。Mainly prevented from structure crack through water of spillway gate chamber and flood discharge tunnel line concret, needed comprehensive analysis and study, various effects of concrete cracks acted。Mass concrete structure in pouring construction and dismantled mode board, water dischaged stage, rule of temperature field of long term run and stress field, combined concrete material design and construction design, temperatur measures and maintenance measures, and etc, esuring structure to be in safe stress condition in whole construction, and prevent that cracks should not appear。The principle expressed by responsible for themselves, subsection control, successively checked, very strictly in work。Temperature control management system established that played an decisive role on dam temperature technology problem solved, optimized and various temperatur control standard implemented。...
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