锚碇隧道爆破振动控制技术及其应用效果分析
发布时间：2018-07-29 11:38
【摘要】：锚碇隧道的结构形式及使用特征要求必须严格控制爆破振动对围岩稳定性与完整性所造成的影响。针对锚碇隧道断面大、净距小、钻爆条件差等特点,通过采用单次循环进尺为1.5~1.8 m的短台阶弱爆法施工技术可在满足合理施工进度的情况下实现爆破振动强度的有效控制。同时,根据典型断面掘进爆破时中夹岩墙振动强度测试结果的分析得到:(1)掏槽爆破所受夹制作用是决定锚碇隧道中夹岩墙振动强度的主要因素;(2)伴随开挖断面的增大,中夹岩墙高度增加、厚度减小,中夹岩墙振动强度会有所增加。
[Abstract]:The influence of blasting vibration on the stability and integrity of surrounding rock must be strictly controlled. In view of the characteristics of large cross-section, small net distance and poor drilling and blasting conditions of Anchorage tunnel, the effective control of blasting vibration intensity can be realized by adopting the construction technology of short step weak explosion method with single cycle advance of 1.5 ~ 1.8 m. The blasting vibration intensity can be controlled effectively under the condition of satisfying the reasonable construction schedule. At the same time, according to the analysis of vibration strength test results of middle rock wall in typical cross section excavation blasting, the following conclusions are obtained: (1) the clamping used in cutting blasting is the main factor to determine the vibration strength of rock clamped wall in Anchorage tunnel, (2) with the increase of excavation section, When the height and thickness of the middle intercalated wall increase, the vibration intensity of the middle rock intercalated wall will increase.
【作者单位】： 西南交通大学土木工程学院;
【基金】：国家自然科学基金项目(41272321)
【分类号】：U455.6
本文编号：2152562
[Abstract]:The influence of blasting vibration on the stability and integrity of surrounding rock must be strictly controlled. In view of the characteristics of large cross-section, small net distance and poor drilling and blasting conditions of Anchorage tunnel, the effective control of blasting vibration intensity can be realized by adopting the construction technology of short step weak explosion method with single cycle advance of 1.5 ~ 1.8 m. The blasting vibration intensity can be controlled effectively under the condition of satisfying the reasonable construction schedule. At the same time, according to the analysis of vibration strength test results of middle rock wall in typical cross section excavation blasting, the following conclusions are obtained: (1) the clamping used in cutting blasting is the main factor to determine the vibration strength of rock clamped wall in Anchorage tunnel, (2) with the increase of excavation section, When the height and thickness of the middle intercalated wall increase, the vibration intensity of the middle rock intercalated wall will increase.
【作者单位】： 西南交通大学土木工程学院;
【基金】：国家自然科学基金项目(41272321)
【分类号】：U455.6
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