On the fifth day of the first lunar month, the sun is just right. The reporter drove from the Luoyuan Expressway exit along the Panshan Road for half an hour, and arrived at Caoyuan Village, the starting town of Luoyuan County. 15 kilometers away, forklifts and workers at the construction site of the Changxi Reservoir Project are intertwined, and a labor scene is in full swing.
On the mountain wall, workers are using shovels and pickaxes to clean the cracks in the rocks. "It's doing dam foundation treatment. Wang Yiming, the captain of the construction team of Xiamen Aneng Construction Changxi Reservoir Dam, told reporters that there is a weak interlayer in the stone joint, and the mud in the interlayer should be removed by more than 1 meter, and then high-grade concrete should be poured and anchored to connect the bedrock on both sides of the gap into a whole, and then concrete can be poured on it.
On the dam face, Qu Biquyi, a Yi worker from Sichuan, is leaning forward to suppress the high-pressure water cannon with all his might, and uses a water column with a pressure of more than 40 megapascals to remove the slurry, loose materials and pollutants from the concrete dam surface until the coarse sand or small stones are slightly exposed. His body and face were covered with dust and water vapor, and within two meters of him, the reporter's head had begun to be "attacked" by concrete splinters and water columns.
This process is called silo face flushing, and then the warehouse is cleared - the working face is cleaned so that the next layer of concrete poured can be tightly bonded. The person in charge of the project, Cai Shaojun from Yunshui Environmental Protection (Luoyuan)**, told reporters that every 30 cm of concrete poured, it must be flattened and rolled, and the maximum thickness of each warehouse is 3 meters.
This is called a 'RCC gravity dam', and the temperature must be controlled during the construction process, otherwise it may cause the concrete to crack. In Fujian, work is often stopped in summer due to high temperatures, so we must seize the construction time in winter and spring. Cai Shaojun said.
Warehouse surface flushing, clearance, prefabricated corridor security, support formwork, steel bar ......During the Spring Festival, more than 20 workers and management personnel stuck to the project site and kept an eye on the construction goal. "From Luoyuan Huokou Reservoir to Changxi Reservoir, many of our workers have been 'seamless' and have spent more than 4 years in Luoyuan County. Wang Yiming said.
Luoyuan Changxi Reservoir is a medium-sized reservoir with a total storage capacity of 11.91 million cubic meters and a dam crest elevation of 2982 meters, the design flood level is 29524 meters, control basin area 246 square kilometers.
The downstream population is large and the terrain is flat, and it is affected by flash floods all year round during the typhoon season and flood season. Cai Shaojun said that in order to protect the safety of people's lives and property, the Changxi Reservoir project was included in the provincial key livelihood projects and provincial key projects, with an estimated investment of 7200 million yuan. After the completion of the reservoir, the flood control standard of Luoyuan County and Qiqi Town will be raised from once in 20 years to once in 30 years; At the same time, it can meet the needs of urban development and citizens for water quality.
Although the weather was fine, the construction site was much colder than the mountain. "In winter, the temperature here is 4 5 times cooler than in the city, and there is often fog. Cai Shaojun said that since the start of the project in August 2019, the construction personnel, with the support of the local government and the water conservancy department, have overcome unfavorable factors such as material source changes, typhoons, and transportation, and have been fighting day and night for several months, successfully completing the dam excavation support, temporary construction facilities, transportation facilities and other projects.
Cai Shaojun proudly said that since the construction of the project, it has been successively selected as the "2022 Water Conservancy Engineering Standardization Demonstration Site" and "2022 Fujian Provincial Water Conservancy Construction Project Civilized Construction Site", and in 2023, it will be awarded the "Party Building + Standardization" demonstration site with the first place in the overall score. (Fujian** reporter Chen Min).
*:Fujian**.