排序方式: 共有6条查询结果,搜索用时 0 毫秒
1
1.
James T. Albers Stephen D. Hudock 《International journal of occupational safety and ergonomics》2013,19(3):279-289
The National Institute for Occupational Safety and Health (NIOSH) conducted a study of ironworkers to evaluate their risk for developing back and hand injuries from hand-tying reinforcing steel bar and to investigate whether power tying tools can be an effective intervention for the prevention of work-related musculoskeletal disorders. A field investigation of biomechanical loading when using 3 techniques to tie together rebar was conducted. Researchers measured employees ‘ wrist and forearm movement with goniometers and videotaped and analyzed trunk postures. Manually tying rebar at ground level involved sustained deep trunk bending and rapid, repetitive, and forceful hand-wrist and forearm movements. Using a power tier significantly reduced the hand-wrist and forearm movements and allowed the ironworkers to use one free hand to support their trunk posture while tying. Adding an extension handle to the power tier allowed the ironworkers to tie rebar while standing erect, minimizing sustained trunk flexion. 相似文献
2.
植筋在房屋加固、改造中的应用实例研究 总被引:2,自引:0,他引:2
植筋技术可使钢筋与混凝土之间产生牢靠的粘结作用,能达到类似于预埋钢筋的效果。在武汉兆富大厦地下室结构改造工程中应用,效果很好。 相似文献
3.
植筋锚固技术在ESP扩建改造工程中的应用 总被引:1,自引:0,他引:1
通过工程实例,介绍植筋锚固技术在建筑结构改造加固中的运用。 相似文献
4.
5.
6.
探讨了水工构筑物设计中的地下水位确定、伸缩缝设置、总体布置及设计与施工配合等问题。设计在满足国家有关政策、规范要求的同时,要做到技术先进、安全适用、经济合理。 相似文献
1