摘要
饱和粉质砂土锚杆施工存在着诸多技术难题,锚杆极限抗拔力影响因素多。文章对压力分散型锚杆采用5种张拉方式,分别进行单元锚索单独张拉、整体张拉极限抗拔力破坏试验。锚索单独张拉大多发生突变型破坏,整体张拉发生缓变型破坏,整体张拉试验更为合理。试验得到饱和粉质砂土锚杆极限抗拔力值,尽管锚固体长度相等,但不同长度锚索极限抗拔力值差异较大。锚索弹性位移与荷载大多成直线关系,并与锚索自身弹性变形相当。塑性位移普遍较小,与锚索长度、荷载大小成正比,约为弹性位移的12%～30%。
There are many technological problems about soil anchor construction in saturated mealy sand, and many factors influence the ultimate pull-out force of soil anchor. In the paper, five pulling methods are applied to destructive test of unit anchor cable and the whole soil anchor. During most of the unit anchor cable tests, destruction happen abruptly. During the whole soil anchor test, the destruction occurs slowly, so the whole soil anchor test may be more rational. The ultimate pull-out force of soil anchor is also provided in saturated mealy sand. If the length of anchor cable is unequal, the force is unequal. Furthermore, the elastic displacement of whole soil anchor is linear with load, and it nearly equals to the elastic displacement of anchor cable itself. But, the plastic displacement is generally small, and it is directly proportional to the value of length or load. The plastic displacement is about 12%-30% of the elastic displacement.
出处
《水运工程》
北大核心
2009年第2期36-39,共4页
Port & Waterway Engineering
关键词
粉砂土
锚杆
极限抗拔力
压力分散型
mealy sand
soil anchor
ultimate pull-out force
compression dispersive type
作者简介
顾培英（1968-），女，博士，高级工程师，主要从事水利、水运结构工程研究。
