① Mainly control the internal and e

① Mainly control the internal and external temperature difference of concrete and the temperature difference between the surface and the outside, prevent the rapid cooling of concrete surface, and adopt concrete surface insulation measures or water storage maintenance measures; ② Strengthen concrete curing, strictly control the temperature rise and fall speed of concrete, so that the temperature difference of concrete surface coverage is less than 8-10 ℃; ③ The temperature stress can be reduced mainly from the aspects of soil pouring temperature, temperature rise, reducing temperature difference, improving construction operation technology and improving structural constraints; ④ Use low heat cement; ⑤ Improve aggregate gradation, such as adding # *. Block stone to mass foundation concrete; Adding fly ash or superplasticizer into concrete to reduce cement consumption and hydration heat; ⑥ The mixing water is mixed with ice chips to reduce the water temperature, and the sand and gravel aggregate is cooled by spraying cold water to reduce the pouring temperature of concrete; ⑦ Reasonably arrange the construction process for thin-layer pouring and tamping, and evenly rise to facilitate heat dissipation; ⑧ The temperature stress of mass concrete is related to the size of the structure. The larger the size of the concrete structure, the greater the temperature stress. Therefore, the construction process should be reasonably arranged and poured in layers and blocks to facilitate heat dissipation and reduce constraints; ⑨ For mass concrete foundation construction, serpentine cooling water pipes can be buried in the foundation to make the temperature difference inside and outside the concrete less than 25 ℃; ⑩ Strengthen the monitoring of concrete temperature and take cooling and protection measures in time; ⑪ Reserved temperature contraction joint; ⑫ Reduce constraints. Before pouring concrete, about 50-100mm sand cushion should be laid on bedrock and old concrete or painted with asphalt and other materials; ⑬ Strengthen concrete curing. After concrete pouring, cover it with wet straw curtains and hemp sheets in time, pay attention to watering for curing, and appropriately extend the curing time to ensure that the concrete surface cools slowly. In cold season, thermal insulation measures shall be set on the concrete surface to prevent cold wave attack; ⑭ Temperature reinforcement shall be properly configured to reduce the temperature stress of concrete and control the temperature crack of concrete within a certain range.