Collapse and Landslide Hazard Characteristic along Railway Line in Chengdu-Lanzhou of China Dongliang He School of Civil Engineering, Hunan University of City, Yiyang, Hunan 413000, China e-mail:
[email protected] ABSTRACT The Chengdu-Lanzhou Railway locates in the Sichuan province and Gansu province. After the “5.12” Wenchuan earthquakes, a massive landslide, collapse, debris flow occurred, worsening the geological environment. The collapse of the mountain behind the Mao County valley gully elementary school is one of these many serious hazards, threatening the life and property security of 160 teachers and students in the school, as well as the residents around. In order to find out the form, structural morphology, scale, deformation behavior and the formation mechanism of the collapse hazard, studies on the structure forms, buried depth and the engineering construction, engineering geology emergency exploration to the collapse hazard has been carried out in this paper. Through varied reconnaissance means, such as geodesy, exploration and field testing, the causes, form, scale, scope, steady state and perniciousness of the collapse and the landslide next to the teaching building have been ascertained, and the deformation mechanism has been analyzed to provide a reference to the further assessment of prevention and control engineering, ensuring the successful construction of the Chengdu-Lanzhou Railway. KEYWORDS: landslide; collapse; Wenchuan earthquakes; assessment INTRODUCTION The Chengdu-Lanzhou Railway locates in the Sichuan province and Gansu province. It starts at Chengdu, going via Guanghan, Shifang, Mianzhu, Mao County, Songfan before arriving at Jiuzhaigou Valley, and extends northwards to the Hadapu station of the Lanzhou-Chongqing railway which is under construction.