[1]邓祥辉,陈建勋,罗彦斌,等.水平层状围岩隧道爆破控制技术[J].长安大学学报(自然科学版),2017,37(02):73-80.
　DENG Xiang-hui,CHEN Jian-xun,LUO Yan-bin,et al.Blasting control technology of horizontal stratified rock tunnel[J].Journal of Chang’an University (Natural Science Edition),2017,37(02):73-80.
点击复制

水平层状围岩隧道爆破控制技术()
分享到：

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第37卷
期数:
2017年02期
页码:
73-80
栏目:
桥梁与隧道工程
出版日期:
2017-03-31

文章信息/Info

Title:
Blasting control technology of horizontal stratified rock tunnel
作者:
邓祥辉; 陈建勋; 罗彦斌; 李旭东
1. 长安大学 公路学院，陕西 西安 710064；2. 西安工业大学 建工学院，陕西 西安 710032
Author(s):
DENG Xiang-hui;  CHEN Jian-xun;  LUO Yan-bin;  LI Xu-dong
1. School of Highway, Chang’an University, Xi’an 710064, Shaanxi, China; 2. School of Civil and Architecture Engineering, Xi’an Technological University, Xi’an 710032, Shaanxi, China
关键词:
隧道工程; 水平层状围岩隧道; 爆破参数; 优化; 现场试验
Keywords:
tunnel engineering;  horizontal stratified rock tunnel;  blasting parameter;  optimization;  field test
分类号:
U451
文献标志码:
A
摘要:
针对水平层状围岩隧道开挖时，由于水平层理的影响以及爆破扰动，极易导致隧道拱部发生离层、掉块以及严重的超挖、欠挖等问题。采用爆破应力波传播理论分析了爆破应力波对水平节理岩体的作用机理，从理论上解释了水平层状围岩隧道拱顶发生离层、平顶的原因；依托大梁峁公路隧道工程进行现场爆破参数优化试验；并针对拱部超挖严重，上台阶下部边墙欠挖的情况，提出了控制措施。研究结果表明：通过爆破参数优化，上台阶开挖单次爆破可减少6%的起爆药量，下台阶可减少29%的起爆药量；从爆破效果来看，优化后6个试验断面平均超挖由原来的7.81 m2减少为2.56 m2，优化后超挖面积仅为优化前的31%，欠挖也得到有效改善，优化后的爆破方案不仅能大幅减少隧道超欠挖，减少炸药用量，还能提高开挖后围岩的质量，使隧道施工更安全；拱部超挖可通过内移周边眼、适当增加周边眼间距、减少装药量以及非连续装药等措施进行控制；上台阶下部边墙欠挖可通过缩小周边眼间距或增设周边眼等措施来解决。研究成果不仅可保证依托工程的施工安全，减少超欠挖，节约成本，加快施工进度，还可为类似工程提供参考。
Abstract:
Due to the influence of horizontal joint and blasting disturbance, separation and slack drop are more prone to occur in arch crown during the excavation of horizontal stratified rock tunnel. At the same time, excessive and insufficient excavation is very common. In this paper, the propagation theory of explosive stress wave was used to analyze the mechanism of horizontal joint under the influence of propagation of stress wave, and the reasons of separation and flat top in tunnel arch crown in horizontal layered rock were explained theoretically. Meanwhile, field blasting parameter optimization tests were conducted to Daliangmao Tunnel. Control measures were proposed to solve the problems of excessive excavation in arch crown and insufficient excavation in sidewall corners of upper steps. The results show that after blasting parameter optimization, the initiation dose of a single shot blasting on the upper steps reduces by 6%, and that of the lower steps reduces by 29%. In terms of blasting effect, the average excessive excavation area of the six test sections reduces from 7.81 m2 to 2.56 m2 after the optimization of blasting solution. The excessive area is only 31% of the original solution and the insufficient excavation can also be controlled effectively. The excessive excavation in the arch crown can be controlled by moving inside periphery holes, appropriately increasing the distance among periphery holes, reducing the amount of charge and taking non-continuous charge. Insufficient excavation of sidewall corners of upper steps can be solved by narrowing periphery holes or adding additional periphery holes. Therefore, the optimized blasting solution can not only greatly reduce the excessive and insufficient excavation of tunnel, reduce the amount of explosives, but also can improve the stability of surrounding rock after excavation, so as to make the tunnel construction safer. The results of this paper can ensure the security of tunnel construction, reduce the excessive and insufficient excavation, save cost and speed up the construction progress. It can provide references for similar projects as well.

相似文献/References:

[1]罗 刚,石研玉,申 奇,等.水中悬浮隧道锚索横向动力特性分析[J].长安大学学报(自然科学版),2012,32(03):73.
　LUO Gang,SHI Yan-yu,SHENG Qi,et al.Lateral dynamic characteristics analysis for cable of submerged floating tunnel in water[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):73.
[2]易富君,韩 直,邓 卫.公路隧道群运营安全性综合评价方法[J].长安大学学报(自然科学版),2012,32(03):79.
　YI Fu-jun,HAN Zhi,DENG Wei.Comprehensive safety evaluation method of expressway tunnel group[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):79.
[3]王 磊,郭洋洋.特长公路隧道运营网络通风技术[J].长安大学学报(自然科学版),2012,32(04):51.
　WANG Lei,GUO Yang-yang.Network ventilation technology of operation period in super long highway tunnel[J].Journal of Chang’an University (Natural Science Edition),2012,32(02):51.
[4]韩日美,宋战平,谢永利,等.土压平衡盾构土仓压力对地表沉降的影响[J].长安大学学报(自然科学版),2010,30(01):59.
　HAN Ri-mei,SONG Zhan-ping,XIE Yong-li,et al.Affection of soil warehouses pressure of EPB shield on ground settlement[J].Journal of Chang’an University (Natural Science Edition),2010,30(02):59.
[5]朱正国,陈明长,孙明磊.双连拱公路隧道围岩压力计算方法[J].长安大学学报(自然科学版),2010,30(02):75.
　ZHU Zheng-guo,CHEN Ming-zhang,SUN Ming-lei.Calculation method of pressure of surrounding rock on double-arch road tunnel[J].Journal of Chang’an University (Natural Science Edition),2010,30(02):75.
[6]刘 辉,李 波,吴从师,等.岩溶隧道掘进爆破震动效应分析[J].长安大学学报(自然科学版),2010,30(04):56.
　LIU Hui,LI Bo,WU Cong-shi,et al.Analysis on effects of vibration resulted from driving blasting in Karst tunnel[J].Journal of Chang’an University (Natural Science Edition),2010,30(02):56.
[7]朱春生,杨晓华,来弘鹏,等.公路隧道衬砌后空洞对结构安全的影响[J].长安大学学报(自然科学版),2010,30(05):63.
　ZHU Chun-sheng,YANG Xiao-hua,LAI Hong-peng,et al.Impact of empty hole behind expressway tunnel lining on structure safety[J].Journal of Chang’an University (Natural Science Edition),2010,30(02):63.
[8]来弘鹏,谢永利,杨晓华.不同应力场软弱围岩公路连拱隧道中墙受力特征[J].长安大学学报(自然科学版),2010,30(06):50.
　LAI Hong-peng,XIE Yong-li,YANG Xiao-hua.Stress characteristics of middle wall in soft-wreak surrounding rocks highway multiple-arch tunnel under different stress field[J].Journal of Chang’an University (Natural Science Edition),2010,30(02):50.
[9]来弘鹏,谢永利,杨晓华,等.不同应力场软弱围岩公路连拱隧道力学特征试验[J].长安大学学报(自然科学版),2008,28(06):60.
　LAI Hong-peng,XIE Yong-li,YANG Xiao-hua.Model tests for soft-weak surrounding rocks highway multiple-arch tunnel stress characteristics in different stress fields[J].Journal of Chang’an University (Natural Science Edition),2008,28(02):60.
[10]郭建新,高永涛.基于围岩破坏区和承载力的锚杆支护设计[J].长安大学学报(自然科学版),2008,28(06):65.
　GUO Jian-xin,GAO Yong-tao.Design of anchor bolt support based on analysis of surround rock damage area and bear force[J].Journal of Chang’an University (Natural Science Edition),2008,28(02):65.

更新日期/Last Update: 2017-04-07