摘要
针对宁夏银川某基坑工程,以土钉长度、竖向间距、倾角为因素,安全系数为考察参数,设计L25(56)正交试验方案,以及双因素全面试验方案,应用Plaxis岩土工程专用有限元数值模拟分析软件,采用强度折减法,计算分析各因素对土钉支护结构稳定性的作用规律,优化土钉支护参数.研究得出:安全系数随土钉长度的增大而增大,但长度大于临界值后,继续增加对安全系数的提高有限;竖向间距过小或过大,安全系数均减小;倾角增大,土钉较短时安全系数提高,土钉较长时安全系数降低.最优支护参数为土钉长度15 m,竖向间距2.5 m,倾角8°.
For the reason of need more space using in video capture device and requiring special resource, a network video collection and transmission program is designed based on embedded system. ARMll and embedded Linux are used in the program to build an embedded platform. The MJPG-streamer is transplanted to the platform as a video server, completing image collection, compression and transmission. Users can observe the real-time video images using a web browser remotely. The experimental results show that the method can collect, handle and send video, remote observation of video images in real time, the occupied space is small.
出处
《宁夏工程技术》
CAS
2014年第1期27-29,36,共4页
Ningxia Engineering Technology
基金
教育部"长江学者和创新团队发展计划"创新团队项目(IRT1067)
关键词
基坑工程
土钉墙
参数优化
embedded System
Linux
MJPG-streamer
video image collection