The Afternoon Creek rockslide near Newhalem, Washington   总被引：1，自引：0，他引：1  

A. Strouth  R. L. Burk  E. Eberhardt 《Landslides》2006,3(2):175-179

A series of mass wasting events occurred above a Washington, USA, highway in the Cascade Mountains in November and December 2003. The largest event was a rockslide involving approximately 750,000 m³ that occurred on November 9, 2003. The source zone for this event was located at the crest of a ridge. Most of the debris fell to the east of the sharp ridge and was deposited in the relatively shallow sloping Afternoon Creek without causing damage to the highway. Lesser amounts of debris fell to the west of the ridge, sliding 600 m down the steeper Falls Creek and impacting the road. There is an evidence of one or more historical rock avalanches at this location. Displacement of reference points, ground vibration, crack extension, and tilting are being monitored due to concerns that future slope failures or remobilization of debris might again damage or block the highway.  相似文献   

福建省山区高速公路工程施工控制网设计方案研究     

林修锬 《现代测绘》2007,30(1):22-23

从福建省山区高速公路工程施工现状出发,分析了导线最弱点点位中误差的影响因素,导出了在山区进行控制测量时,影响导线最弱点中误差的主要因素是导线边数,从而提出了一种既经济适用又满足精度要求的设计方案.  相似文献   

都汶公路沿线诱发泥石流的降雨特征   总被引：1，自引：0，他引：1  

郭晓军  崔鹏  马力  孔应德 《山地学报》2014,32(6)

都(江堰)汶(川)公路是通往川西北的重要交通要道,地震造成该路段泥石流危害极为严重。选择都汶公路南段为研究区,收集了2008—2011年间的22次泥石流事件及其对应的降雨过程,分析了雨型、降雨强度、前期降雨等因子对泥石流的影响,并利用I-D模型得出研究区泥石流的降雨阈值,分析时间和流域面积对阈值的影响。各种档次降雨雨型都可能诱发泥石流,降雨强度是泥石流的控制因子,降雨历时越长,需要的激发雨强越小;前期降雨对泥石流起着较为重要的作用,只有在超过14.8 mm/h时,较小的雨强才有可能诱发泥石流,且有效前期降雨越大,需要的激发雨强越小。地震造成泥石流的诱发临界降雨大幅减小,地震之后诱发泥石流的降雨条件逐年回升,2009年之后泥石流的降雨阈值较2008年大幅上升;流域面积不同,泥石流的频率也有所差异。该研究可为该区泥石流的监测预警与预测预报作贡献。  相似文献   

不规则公路桥梁地震动参数快速评估技术研究     

王德俊 《华南地震》2019,39(3):89-94

快速评估不规则公路桥梁的地震动参数为桥梁地震响应分析、桥梁安全性设计提供科学依据。研究一种快速、有效的不规则公路桥梁地震动参数评估技术,以C形不规则公路桥梁为原型设计振动台与公路桥梁模型,选取Imperial Valley波作为地震动输入,采用加速度传感器、位移传感器采集桥梁加速度与位移数据;结合已知地震动数据计算地震动持续时长参数,优化衰减模型获取精确的地表峰值加速度参数。分析地表峰值加速度与其他地震动参数关系可知,地表峰值加速度与损坏概率成正比,桥梁结构发生损坏的概率在50%以下;震级越大、震中距越小、地表峰值加速度越大。  相似文献   

Dynamic Response of Double-Sided Loess Slope under Vehicle Load   总被引：1，自引：1，他引：0  

LI Peng  YANG Hucheng  SU Shengrui  LIU Xiang 《中国地震研究》2020,34(4):482-495

In order to verify and study the dynamic response law on the double-sided loess slope under the action of the waves generated by automobile traffic, we select a double-sided loess slope from the long section of Anzi Road as the research object. Both field investigations and on-site monitoring processes are conducted, for the purpose of providing robust basis for road protection in these conditions. In detail, vehicle-induced vibration signals are different according to different vehicle types, speeds, as well as positions, and thus are collected, respectively. Based on the statistical analysis of the signals, the vibration response law and frequency spectrum characteristics of the slope are summarized. The results show that:① The dynamic response of the double-sided loess slope increases as the vehicle load increases, and the strong vibration response area is located in the middle of the side slope; ② When the vehicle load is small, the vibration wave amplification effect is obvious. On the contrary, when the vehicle load is large, the vibration wave amplification effect is weakened; ③ The spectrum distribution of the X-direction wave is single-peak shape, and the dominant frequency is concentrated in 30-50 Hz; the frequency spectrum distribution of the Z-direction wave shows a multi-peak shape, and the dominant frequency is concentrated in 20-180 Hz; ④ The vibration wave propagates in the slope. The frequency change shows little correlation with the type, speed and position of the vehicle, and instead, it is mainly determined by the slope itself. This study reveals the dynamic response on doubled-sided loess slopes and provides both theoretical and practical significance for the road protection in such situations.  相似文献   

公路GIS数据的采集及质量控制   总被引：1，自引：0，他引：1  

张晓佳  何东坡  丁明霞 《测绘与空间地理信息》2007,30(2):40-42

在公路GIS中数据的采集及质量控制是一项十分重要的基础工作。本文根据绥满公路虎峰岭段的实例,简述公路GIS建立过程中不同于一般地形图的数据采集及质量控制。  相似文献   

太湖流域公路及航道勘察中软土剪切指标综述     

李军海 《江苏地质》2006,30(2):116-119

以太湖流域软土勘察数据为基础,针对公路及航道勘察设计中软土剪切指标的获取、选择、分类以及各指标之间的相互关系进行阐述,同时提出适合本地区的经验公式。  相似文献