本文關鍵詞：呂梁山區黃土邊坡工程地質分區及強度參數選取，由筆耕文化傳播整理發布。

呂梁山區黃土邊坡工程地質分區及強度參數選取

ENGINEERING GEOLOGY DIVISION OF LOESS SLOPE AND ITS STRENGTH PARAMETER SELECTION IN L（U）-LIANG MOUNTAINOUS AREA

[1] [2] [3] [4] [5]

YU Huili, LONG Jianhui, LIU Haisong, JI Yanqing, ZHANG Zhong（ 1Department of Earth Science and Engineering, Taiyuan University of Technology, Taiyuan 030024;2School of Geology

[1]太原理工大學地球科學與工程系,太原030024; [2]長安大學地質工程與測繪學院,西安710054; [3]山西省交通科學研究院巖土工程研究所,太原030006

文章摘要：在山西省黃土高原綜合治理分區圖基礎上,通過實地調查最典型黃土丘陵溝壑區（Ⅰ區）的53個典型公路黃土邊坡,根據邊坡類型、地層組合形式以及邊坡破壞模式等要素,將其進一步劃分為晉西北（Ⅰa）、晉西（Ⅰb）和晉西南（Ⅰc）3個亞區;并對53個邊坡的黃土進行了強度特征的試驗研究,獲得了邊坡黃土在不同直剪試驗方法下的峰值強度、“啟動強度”與殘余強度的參數值.根據邊坡工程地質特征與工程調查類比,對3個亞區邊坡在3種強度參數下的穩定性進行了統計和數值分析,結合應力變形計算實例分析發現：強度參數在不同地域具有明顯的差異特征,晉西北區（Ⅰa）降雨少,構造活動不頻繁,邊坡以坡面破壞為主,采用峰值強度進行邊坡設計更為合適;晉西區（Ⅰb）構造發育,老滑坡較多,且地震活動使得土體強度相對下降,公路邊坡設計的強度參數選用殘余強度,有較高的安全保證;晉西南區（Ⅰc）降雨多,優先選用“啟動強度”,能最大程度地避免地質災害的發生.

Abstr：Based on Shanxi highway engineering geological zoning map, the most typical loess hilly and gully area （I） is further divided into the Northern Shanxi（Ia） ,Jin West（Ib）, and Jin Southwest（Ic）. The three sub-regions are distinguished according to the elements of the slope types, stratigraphie combination and slope failure mode loess. The parameter values of peak intensities, start strengths and residual strengths are obtained from different direct shear test methods after experimental study on the area（I） of 53 highway slopes. An analogy between the geological characteristics of the slope and the real engineering surveys is drawn. Statistic and numerical analysis of slope stability under the three intensity parameters in the three sub-regions are made. It is then found that the strength parameters have significant differences in different geographical characteristics. The Jin Northwest（Ia） has less rainfall and less tectonic activity. For slope to slope failure, the peak intensity slope design is more appropriate. The Jin West End（Ib） has structural development. Its seismic activity makes the relative decline in the strength of the soil. It has more old landslides. The residual strength should be used as the strength of the highway slope design parameters. There is a higher security guarantee. The Shanxi South West（Ic） has more rainfall The start strength should be used in order to avoid geological disasters.

文章關鍵詞：

Keyword：:Lu-liang mountainous area, Loess slope, Engineering geology division, Strength, Parameters

課題項目：山西省交通廳科技項目（09-2-03）,山西省自然科學基金項目（20130110362）資助.

  本文關鍵詞：呂梁山區黃土邊坡工程地質分區及強度參數選取，由筆耕文化傳播整理發布。