创刊词——为积极开展岩土工程学的研究而努力

岩土工程学报终于和读者见面了,这是我国岩土工程学界值得高兴的事情。出版岩土工程学报的目的,就是为了充分发扬学术民主,开展学术交流,促进岩土工程这门科学技术的发展,从而使我国尽快改变目前的落后面貌,赶上国际先进水平。 建国初期或五十年代,我国在江淮平原修建了许多主体水利工程,例如,一系列水库,水闸等,这些工程不仅推动了我国经济建设飞速前进,而且也为我国岩土工程学的发展创造了有利条件。在这些工程中,我国科研人员和工程技术人员成功的运用了一些先进的施工方法和施工技术,同时也使岩土工程方面的试验研究工作取得了一定的进展。

Mechanism and risk evaluation of sliding flow triggered by liquefaction of loess deposit during earthquakes

The large-scale sliding disaster of the saturated low angle soil layer caused by the Palu M_w7.5 earthquake in Indonesia in 2018 has an important warning for the sliding flow triggered by liquefaction of loess deposit during earthquakes in the loess areas. To study the mechanism of large-scale sliding with low slope angle triggered by the liquefaction of the loess deposit during earthquakes, a series of field investigations, in situ tests including SPT and shear velocity tests, dynamic triaxial tests, and SEM tests are conducted based on the in-depth analysis of typical earthquake-induced liquefaction disasters in loess areas. The characteristics and mechanisms of liquefaction of the saturated loess are revealed. The simplified and detailed evaluation methods for the liquefaction of saturated loess sites are proposed. Moreover, on the basis of numerical simulation and theory analysis, the sliding conditions, kinematics and dynamic characteristics of the large-scale sliding flow triggered by the liquefaction of loess deposit during earthquakes are studied. The mechanism of the large-scale sliding of loess deposit is expounded. The prediction model for the sliding distance and disaster range of the large-scale sliding flow triggered by the liquefaction of loess deposit during earthquakes is constructed. The probabilistic risk assessment method for the liquefaction sliding disasters is proposed, and the risk zoning maps of the large-scale sliding flow triggered by the liquefaction of loess deposit with different exceedance probabilities in the Loess Plateau are compiled. Besides, the passive and active prevention methods as well as the comprehensive monitoring and early warning methods are proposed. The results may provide a theoretical basis for the risk assessment, prevention and mitigation of the large-scale sliding flow triggered by liquefaction of loess deposit during earthquakes in the loess regions.