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长春市属地震设防区、建筑场地的稳定性和场地土的正确的抗震分类,对于市区工程的抗震设计是一个重要问题。本文拟就此进行探讨。一、地貌及第四纪地质特征(一)地貌长春市区地貌特征按成因类型可分成堆积地形、剥蚀堆积地形、剥蚀地形(图1)。1.堆积地形:分布伊通河两侧、东宽西窄,总宽4—5km。由亚粘土和下伏砂砾石组成,阶地面微向河床倾斜,高出河水
Changchun City is a seismic fortification zone, the stability of the construction site and the correct seismic classification of the site soil, which is an important issue for the seismic design of urban engineering. This article intends to discuss this. Geomorphology and Quaternary Geological Characteristics (I) Geomorphology The geomorphological features of the urban area of Changchun can be divided into stacked terrain according to the type of formation, denudation of the accumulated terrain and erosion of the terrain (Figure 1). 1. Accumulation of terrain: distribution on both sides of the Yitong River, east-west-wide, total width 4-5km. By the sub-clay and the underlying sand and gravel composition, terrace terrace slightly inclined bed, above the river