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新型让压锚杆作用机理研究
引用本文:郭永建,姜飞,周浩,项小珍.新型让压锚杆作用机理研究[J].力学与实践,2015,37(2):193-196,237.
作者姓名:郭永建  姜飞  周浩  项小珍
作者单位:1. 青岛国信胶州湾交通有限公司, 山东青岛 266500;2. 山东建筑大学, 济南 250101;3. 杭州图强工程材料有限公司, 杭州 310000
摘    要:软岩大变形工程存在因开挖卸荷导致较大的应力释放,在工程施工过程中将会产生较大变形的特点,如沿用传统的锚杆进行支护,岩体的大变形所产生的过大拉力将会造成锚杆的拉断破坏.针对软岩大变形工程存在的该类问题,介绍了一种新型的端部具有让压装置的新型压力分散型让压锚杆,并对该让压锚杆的作用机理和力学行为进行分析,得出锚固体的作用机理与传统压力分散型锚杆相比分为3个阶段,并通过试验的方式确定了该让压锚杆的让压力.这种新型让压锚杆在将锚固体压力分散的同时,实现大变形的让压,适宜在大变形工程中进行应用.

关 键 词:让压锚杆  软岩大变形  压力分散型  作用机理
收稿时间:2014-06-09

THE MECHANISM OF THE NEW-TYPE YIELDING BOLT
GUO Yongjian,JIANG Fei,ZHOU Hao,XIANG Xiaozhen.THE MECHANISM OF THE NEW-TYPE YIELDING BOLT[J].Mechanics and Engineering,2015,37(2):193-196,237.
Authors:GUO Yongjian  JIANG Fei  ZHOU Hao  XIANG Xiaozhen
Institution:1. Qingdao Guoxin Jiaozhou Bay Traffic Co. Ltd., Qingdao 266500, Shandong, China;2. Shandong Jianzhu University, Jinan 250101, China;3. Hangzhou Dodrive Engineering Materials Ltd., Hangzhou 310000, China
Abstract:The soft rock project with large deformation is characteristic of large stress released in the excavation and of large deformation in the construction process. Using the traditional rock bolt support, the large deformation of the rock mass may lead to a large tension, and make the rock bolt fracture. A new-type yielding bolt for soft rock projects with large deformation is proposed in this paper. This yielding bolt is a pressure dispersion-type yielding bolt, and contains a yield supporting device at the bottom of the bolt. The supporting mechanism of the yielding bolt includes three stages, and the yield force value is determined by experiments. The yielding bolt not only disperses the stress in the anchoring body, but also generates a yield deformation, so it could be applied to soft rock projects with large deformation.
Keywords:yielding bolt  soft rock project with large deformation  pressure dispersion-type  mechanism
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