拉力集中型與壓力分散型預應力錨索錨固機理

王樹仁; 何滿潮; 金永軍

doi:10.13374/j.issn1001-053x.2005.03.006

拉力集中型與壓力分散型預應力錨索錨固機理

doi: 10.13374/j.issn1001-053x.2005.03.006

1. 中國礦業大學(北京)巖土工程研究所, 北京 100083;
2. 中國礦業大學(北京)巖土工程研究所, 北京 100083;
3. 中國地質大學(北京)巖土工程研究所, 北京 100083

基金項目:

國家基金委創新群體基金(No.50221402)教育部技術研究重大項目基金(No.10405)

詳細信息

作者簡介:
王樹仁：千樹仁(1968-),男,博士研究生

中圖分類號: TD824.7;TD757.1
計量
- 文章訪問數: 223
- HTML全文瀏覽量: 63
- PDF下載量: 8
- 被引次數: 0
出版歷程
- 收稿日期: 2004-06-15
- 修回日期: 2004-11-05
- 網絡出版日期: 2021-08-17

Anchoring mechanism of prestressed anchor cables under concentrated tension and dispersive pressure

1. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. Geotechnique Institute, China University of Mining and Technology, Beijing 100083, China;
3. Geotechnique Institute, China University of Geosciences, Beijing 100083, China

摘要

摘要: 利用有限差分程序FLAC對一種新型預應力錨索——壓力分散型錨索的錨固機理進行了數值模擬研究.與拉力集中型預應力錨索相比,壓力分散型錨索具有許多優點,尤其適用于對大變形軟巖工程的錨固.對比分析結果表明:壓力分散型錨索錨固段漿體軸力峰值僅為拉力集中型錨索的1/n(n為承載體的數量),且漿體處于受壓狀態;錨固段漿體-巖體界面上的剪力峰值也小于拉力集中型錨索,并沿內錨固段軸向均勻分布;在相同條件下,壓力分散型錨索比拉力集中型錨索能提供更大的錨固力;適當增加承載體的數量是提高壓力分散型錨索錨固力,改善錨固段漿體受力狀態的有效途徑。
- 預應力錨索 /
- 錨固機理 /
- 數值模擬
Abstract: The anchoring mechanism of a Pre-stressed Anchor Cable under Dispersive Pressure (PACDP) was studied with FLAC software. Compared with a Pre-stressed Anchor Cable under Concentrated Tension (PACCT), the PACDP has several advantages and is more suitable for supporting soft rock with large deformation. The peak value of axial stress of the PACDP is only 1/n of that of the PACCT, where n is the number of supporters and the grouted part is in compression. The peak value of shear stress between the grouted part and the drilling wall of the PACDP is also smaller than that of PACCT and evenly distributed along the axis of the anchor. The PACDP can provide a larger anchoring force than the PACCT. It is concluded that pre-stressed anchoring under dispersive pressure is an effective way to enhance the anchoring force and improve the mechanical conditions by suitably increasing the number of grouted parts.
- pre-stressed anchor cable /
- anchoring mechanism /
- numerical simulation