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Test and evaluation of seismic subsidence of loess


8 ~ ji3o. 5605sfl23O45O45 Note: 【A shear stress lines are one-dimensional finite element model is obtained - the calculation consideration of soil shear modulus and damping ratio of non-linear characteristics of ships. 2 Qiu shear value in the planning department on l () values ​​beyond the probability of i3. Vibration times and 20 times for 10 tablets of seismic subsidence coefficient / very Ⅶ vI, the degree of reliability and value (Nam stress quote from Sun Chongshao out the results of the count and others). Damage assessment is currently in the amount of the relevant classification seismic subsidence is not the prevailing norms or rules promulgated under the State Seismological Bureau,[link widoczny dla zalogowanych], subsidence hazard level. The amount of seismic subsidence by following the standard level 1. Volume Wang Sou: Test and Evaluation seismic subsidence of loess 9 【2) the amount of seismic subsidence during the 2 ~ 4cm minor damage (minor earthquake dance area); 【3) the amount of seismic subsidence during the 4 ~ 8cnl a moderate damage ( moderate earthquake dance area); * (4) the amount of seismic subsidence is in the 8 ~ 40cm when serious damage (severe seismic subsidence area );'.( 5) seismic subsidence is unstable failure is greater than 40cm. According to this standard can foundation of the future earthquake damage assessment and prediction, seismic design of foundations for the project and provide the basis for treatment. Table 2 results show that the layer thickness of the site more than 9m. In 14kPa earthquake shear stress, may be formed only when the seismic intensity of earthquake disaster settlement Ⅷ degrees, the maximum amount of shock dance in 3-7O ,6-65 lots, the amount of seismic subsidence, respectively {-9enl and 55cm-divided according to the above criteria for the middle of a seismic subsidence of the lot area, most of the remaining sections of the mild shock dance area. When the degree of seismic intensity Ⅶ - widened moderate seismic subsidence area, only 665 lots just to dance a serious earthquake seismic subsidence zone volume 8.4cm. 5 Conclusion of works by Liu tlg ~ fl9 seismic subsidence field trials. loess in the area of ​​seismic dance characteristics were evaluated and partition prediction. for the seismic design of foundation soil and processed to provide a quantitative standard. This method works on the foundation of the loess areas of major earthquake damage prediction . Seismic Design and handling of practical significance. on the section of Yu Wen associate help and guidance - would like to thank Xiang http!