An Experimental Study on the Shear Performance of Fully Encapsulated Cable Bolts in Single Shear Test

被引：33

作者：

Aziz, Naj ^{[1
]}

Rasekh, Haleh ^{[1
]}

Mirzaghorbanali, Ali ^{[1
,2
]}

Yang, Guanyu ^{[1
]}

Khaleghparast, Saman ^{[1
]}

Nemcik, Jan ^{[1
]}

机构：

[1] Univ Wollongong, Sch Civil Min & Environm Engn, Northfields Ave, Wollongong, NSW 2500, Australia

[2] Univ Southern Queensland, Sch Civil Engn & Surveying, Ctr Future Mat, West St, Toowoomba, Qld 4350, Australia

来源：

ROCK MECHANICS AND ROCK ENGINEERING | 2018年 / 51卷 / 07期

关键词：

Cable bolt; Single shear testing; Shear strength; Debonding; Pretension load; Surface profile;

D O I：

10.1007/s00603-018-1450-0

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

A set of single shear tests on fully encapsulated cable bolts was carried out using a newly developed and integrated Megabolt single shear apparatus. The instrument is designed to determine the pure shear strength of cable bolts where there is no contact between the host body faces during the shearing process. Eight different types of cable bolt were encapsulated in 40 MPa concrete cylinders, using Stratabinder HS grout. Prior to encapsulation, cable bolts were pretensioned at the desired value using a manual pretensioner. Effects of surface profile, pretension value and debonding on shear strength of cable bolts were investigated. It was found that the shear strength of spiral/indented cable bolts was lower than that of plain cable bolts. Increasing the pretension load decreased the peak shear load of cable bolts. In general, no debonding was observed for spiral/indented cable bolts during shear testing; however, all tested plain cable bolts were debonded.

引用

页码：2207 / 2221

页数：15

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