让压锚索在边坡支护中的应用试验研究及摩阻力问题的探讨

›› 2014, Vol. 35 ›› Issue (12): 3370-3376.

让压锚索在边坡支护中的应用试验研究及摩阻力问题的探讨

汪波^1,2，徐建强³，吴正恺¹ 朱安龙³，王勇²

1. 西南交通大学交通隧道工程教育部重点实验室，成都 610031；2. 杭州丰强土建工程研究院，杭州 310008; 3. 浙江省抽水蓄能工程技术研究中心，杭州 310014

收稿日期:2013-09-11 出版日期:2014-12-11 发布日期:2014-12-15
作者简介:汪波，男，1976年生，博士，副教授，主要从事地下工程方面的研究工作。
基金资助:
国家自然科学基金资助（No. 51378434）；国家科技支撑计划课题（No. 2012BAG05B03）；国家自然基金高铁联合基金（No. U1134208）。

Discussion on frictional resistance problems and application experiment of yielding anchor cable in high slope support

WANG Bo^1,2，XU Jian-qiang³，WU Zheng-kai¹ ZHU An-long³，WANG Yong²

1. Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. Hangzhou Fengqiang Civil Engineering Research Institute, Hangzhou 310008, China; 3. Pumped Storage Engineering Center of Zhejiang Province, Hangzhou 310014, China

Received:2013-09-11 Online:2014-12-11 Published:2014-12-15

摘要/Abstract

摘要： 为研究让压锚索在边坡支护中的自身让压特性，获取让压实测资料，以江西洪屏电站高边坡为工程背景，结合图强工程材料有限公司研发的新型让压锚索，针对不同锚索长度、自由段长度等各种工况进行了现场试验，试验表明：在让压锚索张拉过程中，部分锚索出现了让压滑移现象，让压效果显著；但让压时，长锚索孔口张拉力与设计基础让压力相差很大，说明锚索孔口张拉力并未如理想状态那样全部传递给锚孔内部的锚索，而是很大一部分孔口拉力将用来克服锚索与锚孔之间的摩阻力，且量值上已达到不容忽视的程度。试验同时揭示了锚索长度、锚固长度、锚束及锚孔施工质量对摩阻力的大小起到关键性影响，锚索长度、自由段长度越长、锚束越多、锚孔质量越差，则摩阻力越大。并据此提出了未来边坡防护锚索设计中重点关注及有待于进一步研究的内容。

关键词: 高边坡, 锚索, 设计让压力, 让压量, 摩阻力

Abstract: For researching the self-property of yielding anchor cable in the high slope supported, and getting first-hand data of yielding support, the article taking the high slope located in Hongping power plant in Jiangxi province as engineering background, and using a new yielding anchor cable which is produced by Tuqiang Engineering Materials Co., Ltd., field experiments on different length of free section and yielding anchor cable are conducted. Then reveals: Part of the appeared obvious yielding slippage; yielding effect is significant. But the pressure value is great different between tension of orifice and the design of yielding support. It indicated that orifices tension is not as ideal all passed to the anchor cable inside the hole; instead a large part of the orifice tension will be used to overcome the fritional resistance between the anchor cable and anchor hole, And quantity has reached the degree of which is not allowed to ignore. At the same time, test reveals that the length of anchor and free section, number of beam and anchor hole construction quality play a crucial influence on the value of the friction resistance; the longer anchor cable and free section, the more number of beam, the worse the construction quality are , the larger frictional resistance is. And then design focus and further research contents about slope protection by anchor cable in future are put forward.

Key words: high slope, anchor cable, design yielding pressure, yielding capacity, frictional resistance

中图分类号:

TU 42

汪波，徐建强，吴正恺, 朱安龙，王勇,. 让压锚索在边坡支护中的应用试验研究及摩阻力问题的探讨[J]. , 2014, 35(12): 3370-3376.

WANG Bo ，XU Jian-qiang ，WU Zheng-kai, ZHU An-long ，WANG Yong,. Discussion on frictional resistance problems and application experiment of yielding anchor cable in high slope support[J]. , 2014, 35(12): 3370-3376.

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