刚果共和国砂性土路基雨季施工问题与处理

介绍刚果共和国1号公路黑角(Pointe-Noire)至马雷累(Malele)段砂性土路基在雨季施工的关键技术措施。实践证明:通过排水处理,设置挡水平台,加强边坡保护,采用石灰或水泥处治砂性土作路基填料,其公路路基稳定可靠。     

瀑布沟大坝工程雨季填筑施工技术

瀑布沟大坝主体工程具有填筑量大、工期紧、强度高、填筑技术要求高、质量标准严的特点。砾石土心墙料的填筑与生产则更是重中之重,是制约大坝填筑的关键。而砾石土填筑受雨季施工影响较大,因此,探索大坝工程在雨季填筑施工措施,对砾石土料高效快速填筑打下很好的基础。     

邕江河面无动力趸船汛期抗洪受力分析

由于汛期气象、水文变化非常大,停泊在邕江河段的无动力趸船如果没有可靠的锚泊及系泊设备,将会随波逐流,对南宁市十多座桥梁的安全构成严重的威胁.文章从南宁市汛期的实际情况出发,将现行规范和理论计算相结合,对漂浮在邕江河面上的无动力趸船行汛期受力情况进行分析,提出了保障无动力趸船汛期安全的措施.     

沈阳市鸟岛斜拉桥主塔冬期施工

介绍沈阳市鸟岛斜拉桥主塔混凝土冬期施工方法。     

An Analysis of Weekend Work Activity Patterns in the San Francisco Bay Area

The purpose of this study is to examine the spatial and temporal characteristics of weekend work episodes. Specifically, we examine whether individuals work over the weekend and, if they work, whether they work at home or outside the home. We also model the time of day of weekend work. The empirical analysis in the paper is based on the 2000 San Francisco Bay Area Travel Survey. The results indicate the important effects of day of week/seasonal effects, individual demographics, work-related variables, household characteristics, and location variables on weekend work participation characteristics. The models estimated in the paper may be embedded within a larger weekend activity-travel pattern forecasting model system.