提高锚杆锚固力方法研究

详细信息

收稿日期: 2001-05-14

修回日期: 2001-06-27

刊出日期: 2001-09-30

STUDY ON THE METHOD TO STRENGTHEN ANCHORING FORCE OF ANCHORAGE BAR

Received Date: 14 May 2001

Revised Date: 27 June 2001

Publish Date: 30 September 2001

摘要: 在总结大连地区15项工程76根锚杆抗拔试验时发现锚杆的锚固力是受多种因素影响的,其中主要因素是钻探成孔工艺(影响c,φ值)和锚杆注浆质量(影响k0值).对于风化岩或土层灌浆锚杆建议采用风动成孔;对于中风化或微风化岩层灌浆锚杆建议采用风动成孔并进行清水洗孔;对于锚杆注浆建议采用膨胀砂浆,并建议锚杆抗拔试验同时进行钢筋应力测试.
- 锚固力 /
- 抗拔试验 /
- 风动成孔 /
- 膨胀砂浆
Abstract: Though 76 pull-out type tests for anchorage bars in 15 projects in Dalian area,it is recognized that the anchoring force is affected by multiple factors.The major factors are the drilling techniques and quality of poured mortar. To strengthern the anchoring force of anchorage bar,the author suggests to use air drilling technique for weathered rocks or soil.And for medium and weakly weathered rocks,the drilling holes should also be washed with clean water.Expansive mortar is suggested to pour the anchorage bars.The stress of steel should be measured during the pull-out type tests for anchorage bars.
- anchoring force /
- pull-out type test /
- air drilling /
- expansive mortar