土工基础

›› 2018, Vol. 32 ›› Issue (6): 681-684.

• 工程实录 • 上一篇    下一篇

软岩地基中全粘结式抗浮锚杆试验分析

王小卫   

  1. (江苏省建苑岩土工程勘测有限公司，南京 210019)
  • 收稿日期:2018-07-09 修回日期:2018-07-20 出版日期:2018-12-20 发布日期:2018-12-21
  • 作者简介:王小卫（1978-），男，高级工程师，国家注册土木（岩土）工程师，研究方向为岩土工程勘察、试验及检测。

Test Analysis of Fully Bonded Buoyancy Anchors in Soft Rock

WANG Xiaowei   

  1. (Jiangsu Jianyuan Geotechnical Engineering Survey Co., Ltd., Nanjing 210019)
  • Received:2018-07-09 Revised:2018-07-20 Online:2018-12-20 Published:2018-12-21

摘要： 基于软岩地基中全粘结式抗浮锚杆分级加载和多级用循环加载两种抗拔试验结果，分析了全粘结式岩石抗浮锚杆荷载-变形规律、锚固长度、位移允许值及岩石与锚固体粘结强度等取值，试验结果表明：软岩地基中全粘结式抗浮锚杆的变形由弹性变形发展到弹塑性变形，最终达到塑性变形的过程；全粘结式抗浮锚杆在允许变形量在10 mm范围内，锚固长度可取到4 m是安全的；软岩地基中全粘结式抗浮锚杆与岩体粘结强度特征值最小可取到127 kPa。

关键词: 抗浮锚杆, 抗拔试验, 锚固长度, 位移允许值, 粘结强度

Abstract: This paper presents test results of static incremental loading and cyclic loading test results of fully bonded buoyancy anchors in soft rock mass. Various parameters, such as, stressdeformation, bonding length, allowable anchor deflection and bonding strength between anchor and soft rock, are evaluated. The following conclusions could be reached: the deformation characteristics of the fully bonded anchors in soft rock start with the elastic, elastoplastic and finally, full plastic stage would be reached; An allowable deflection of 10 mm at the head of the anchor can be used; the maximum bond length of 4 meters can be used and the average bond strength, frbk,  of 127 kPa can be used in the design.

Key words: Buoyancy Rock Anchors, Pullout Tests, Anchor Length, Allowable Deflection, Bond Strength