摘要
对杂填土内土钉的受力特点及边坡的位移特性进行了现场试验研究,得出了若干有意义的结果和结论。首次测得并分析了杂填土中土钉的双弓形应变分布形态,指出这是填土边坡中存在2个或以上潜在滑动面的结果;首次测得并分析了土钉临界锚固长度,指出在本试验条件下,其长度约为9 m,并认为临界锚固长度是应变(应力)峰值点、零值点和破坏点同时发生转移而形成,锚固类结构(锚杆、锚索、土钉)均具有此特点。
In-situ testing study on the mechanical behavior of soil nailing and the displacement characteristics of miscellaneous fill slope is carried out. A number of significant conclusions are proposed. For the first time, double arciform strain of the soil nailing is observed in the miscellaneous fill. It is considered as the result that there are two (or more) potential slide planes in the miscellaneous fill. The critical anchorage length is analyzed and determined for the first, which is 9 m in this experiment. The critical anchorage length is formed because of the transfer of the peak value point, the zero value point of the stain (stress) and the wreck point at the same time. It is found out that all anchorage structure (anchor-bolt, anchor-cable and soil nailing) have this characteristic.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第5期898-904,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金项目(50279054)
关键词
地基基础
杂填土
复合土钉
预应力锚杆
基坑支护
Anchorages (foundations)
Settlement of structures
Slope protection
Slope stability
Strain
