Earthquake Engineering Geological Zoning In Baoji And The Surrounding Area

As one of key anti-shock and disaster reduction Projects in provincial and civic Eleventh Five-Year Plan, Baoji seismic micro-zoning will provide the basis for quake-resistant and seismic fortification of urban planning,urban construction and significant construction project and improve an ability of defense geologic hazard.Engineering geology zoning is an important component of the Baoji seismic micro-zoning project and each kind of graphic document foundation bases on it. For a long time, people has systematic researched on the engineering geology zoning in Baoji, but the research on it involved with seismic micro-zoning was relatively small.Engineering geology zoning takes the Baoji seismic micro-zoning project as the objective.The seismic micro-zoning project values engineering geological conditions of the site.Especially local site conditions have effects on ground shock.Thus it is very important that engineering geologic unit division should base on site condition..Engineering geological zoning mainly considers some engineering geologic conditions, such as relief, structure, rock-soil mass type, engineering geological feature, hydrogeologic condition, unfavorable geological phenomena,etc. Firstly, the engineering geologic units are divided initially based on existing datum. Secondly, site reconnaissance should be carried out on the engineering geological units so as to proofread the existing unit boundary. Further,thesis fixes on some important site condition as zoning basis, and carries on two-level districts. Finally,thesis works out engineering geological zoning map and related maps.This division is based on the principle of region similarity and interregional differences, engineering geological zoning of Baoji and surrounding area. Take the geography as the basis, according to the equivalent shear wave velocity, different geomorphic units covering layer thickness and the rock and soil physical and mechanical indexes of the geomorphic units to similar classified.First divide it into different zones,then according to the different geomorphic units and bad geological phenomenon, divide them to sub districts. According to the engineering geological conditions, geological engineering division of Baoji is divided into 8 regions and 11 sub regions.