Chengdu land subsidence fastest 1.4 cm a year expert because of urban construction cagliari exchange

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The fastest one year in 1.4 cm experts for city construction land subsidence in Chengdu: red is the deformation rate of the place, the Green strain rate is small, yellow local online news Sichuan intermediate strain rate (Liu Laying reporter Zhao Rongmei Hao Yong) July 9, 2014, Chengdu Wuhou District rainstorm caused a palm street parking lot collapse, 4 along with the car on the ground a few trees to fall within a few meters deep pit. The evening of July 9, 2015, ground collapse two Huan Lu Bei San Duan, Chengdu City District, simply caused no casualties. On the afternoon of March 6, 2016, the accident of road collapse occurred in Chengdu. At the time of the incident, a taxi into the pit, no injuries. In recent years, but similar news emerge in an endless stream, what are the reasons? High-rise buildings, subway, in a modern city "standard" at the same time, it threatens the city surface safety? Recently, the reporter walked into the third Sichuan Provincial Academy of Engineering Surveying and mapping these issues, listen to them to talk about these buried in the underground thing. Chengdu is the largest local settlement of the fastest 1.4 cm "years according to the objectives and tasks of the development of Surveying and mapping in Sichuan province" in 12th Five-Year "development plan", and the Sichuan Provincial Bureau of Surveying and mapping geographic information working arrangements by the Sichuan Province third surveying and Mapping Engineering Institute is responsible for key regional deformation monitoring project implementation, the third surveying and Mapping Engineering Institute of engineer Sun Xiaopeng the person in charge of the project. From 2013 to 2015, he has been involved in Chengdu, Mianyang, Leshan and 4 cities in the land subsidence monitoring work. Sun Xiaopeng introduced the key regional ground deformation monitoring work from the beginning of 2013, we mainly in high resolution radar image COSMO-SkyMed as the data source, the Permanent Scatterers interferometry radar (PS-InSAR) monitoring 4 city completed in Chengdu, Mianyang, the monitoring precision can reach millimeter. "We found that in these four cities, the land subsidence rate in Chengdu was the largest." Sun Xiaopeng told reporters. In the year of settlement to that strain rate in the monitoring period lasted for two years in Mianyang City, Leshan City, Dujiangyan city overall settlement quantity, Chengdu’s annual settlement is the largest volume of 2.2 cm per year, the minimum is -2.8 cm. The reason, Sun Xiaopeng said: the main cause of land subsidence in Chengdu is the human reason is the development of real estate and the construction of the subway." In recent years, Chengdu to start building a new subway line each year at the rate of construction of the subway, at the same time, real estate construction is very quickly. These frequent active urban construction activities are the main cause of land subsidence in Chengdu. Through the monitoring found that the subway through the regional rate of change is significantly higher than other regions, the formation of a concave feeling, the subway line after the shield will have a larger settlement than the surrounding area". On the other hand, due to the construction of high-rise buildings, foundation construction needs pumping groundwater, at the same time, after the completion of the building will have self weight, but also the cause of land subsidence. Sun Xiaopeng said that the Chengdu plain sedimentation rate increases gradually from the west to the east. In this regard, Sun Xiaopeng gave a scientific explanation. )相关的主题文章:

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