城市地铁联络通道下穿爆破地表振动空洞效应

董合费; 朱斌; 蒋楠; 杨玉民

doi:10.11858/gywlxb.20220553

城市地铁联络通道下穿爆破地表振动空洞效应

doi: 10.11858/gywlxb.20220553

董合费^1,,
朱斌²,
蒋楠^2,*, ,,
杨玉民²

1.
温州市瓯江引水发展有限公司, 浙江温州　325000
2.
中国地质大学(武汉)工程学院, 湖北武汉　430074

基金项目: 国家自然科学基金（41972286，42072309）；爆破工程湖北省重点实验室开放基金（HKLBEF202001）

详细信息

作者简介:
董合费（1976－），男，本科，高级工程师，主要从事水利工程建设和运行管理研究.E-mail：327752391@qq.com

通讯作者:
蒋　楠（1986－），男，博士，副教授，主要从事隧道工程稳定性研究. E-mail：jiangnan@cug.edu.cn

中图分类号: O383; TU91
计量
- 文章访问数: 214
- HTML全文浏览量: 90
- PDF下载量: 26
出版历程
- 收稿日期: 2022-04-01
- 修回日期: 2022-05-07
- 网络出版日期: 2022-09-13
- 刊出日期: 2022-10-11

Surface Vibration Cavity Effect of Underpass Blasting in Urban Metro Liaison Channel

DONG Hefei^1
,,
ZHU Bin²,
JIANG Nan^{2,*
, ,},
YANG Yumin²

1.
Wenzhou Oujiang River Diversion Development Co., Ltd., Wenzhou 325000, Zhejiang, China
2.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, Hubei, China

摘要

摘要: 研究城市地下工程爆破施工地表振动衰减规律对邻近建筑保护具有重要意义。以武汉地铁8号线二期联络通道爆破开挖工程为例，运用现场监测与ANSYS/LS-DYNA三维有限元数值模拟计算相结合的方法，分析了联络通道爆破开挖作用下地表振动的空洞效应，并预测其衰减规律。研究表明：地表质点的峰值振速随着与掌子面距离的增大而不断减小，成洞区域上方地表振速明显大于未开挖区域；空洞效应放大系数随着与爆源纵向距离的增大先增大后缓慢减小，沿通道两侧随着距离的增大而不断减小，空洞效应的影响减弱；在距爆源8 m处（掌子面后方6 m），放大系数达到最大，应重点在距离爆源2～8 m即空洞效应较大的地表区域内开展振动监测。在开挖区域，与介质和爆破条件相关的系数、振动衰减系数和层介质吸收系数分别为58.52、1.43和0.019，而在未开挖区域，则分别为152.09、1.74和0.023。
- 联络通道 /
- 爆破开挖 /
- 空洞效应 /
- 振动速度 /
- 衰减预测
Abstract: The study of surface vibration attenuation law of urban underground engineering blasting construction is of great significance for the protection of adjacent buildings. This paper takes the Wuhan Metro Line 8 Phase Ⅱ liaison channel blasting excavation project as an example and uses a combination of field monitoring and ANSYS/LS-DYNA 3D finite element numerical simulation to analyze the characteristics of surface vibration hollow effect under the liaison channel blasting excavation and predict its attenuation law. The results indicate that where the surface vibration speed is significantly greater than the unexcavated area, there is a “cavity effect”; with the increase of the longitudinal distance between the mass point and the source of the explosion, the cavity effect amplification coefficient increases rapidly until the extreme value and then slowly decreases. Along both sides of the channel with the increase in distance, the amplification coefficient decreases, the effect of the cavity effect is weakened, at a distance of 8 m from the source (6 m behind the palm surface) to reach the maximum, 2−8 m from the source of the cavity effect should focus on vibration monitoring within the surface area. The excavation area with the blasting conditions is related to the coefficient of 58.52, and vibration attenuation coefficient of 1.43, while the unexcavated area of 152.09, and vibration attenuation coefficient of 1.74, the absorption coefficient of the layer media are 0.019, 0.023, respectively.
- access tunnel /
- blasting excavation /
- cavity effect /
- vibration velocity /
- attenuation prediction

HTML全文

图 1 联络通道工程示意图

Figure 1. Schematic diagram of the liaison channel project

下载: 全尺寸图片幻灯片

图 2 上台阶炮孔布置示意图

Figure 2. Schematic diagram of the upper bench blasting hole arrangement

下载: 全尺寸图片幻灯片

图 3 爆破振动测试系统TC4850

Figure 3. Blast vibration test system TC4850

下载: 全尺寸图片幻灯片

图 4 数值模型示意图

Figure 4. Schematic diagram of the numerical model

下载: 全尺寸图片幻灯片

图 5 爆破荷载曲线

Figure 5. Blasting load curve

下载: 全尺寸图片幻灯片

图 6 实测与模拟振速波形对比

Figure 6. Comparison of measured and simulated vibration speed waveforms

下载: 全尺寸图片幻灯片

图 7 联络通道爆破开挖合振动速度云图

Figure 7. Cloud chart of resultant velocity of contact channel blasting and excavation

下载: 全尺寸图片幻灯片

图 8 研究质点的选取

Figure 8. Selected mass points

下载: 全尺寸图片幻灯片

图 9 地表振动速度分布

Figure 9. Distribution of ground vibration velocity

下载: 全尺寸图片幻灯片

图 10 空洞效应的放大系数

Figure 10. Amplification factor of the cavity effect

下载: 全尺寸图片幻灯片

图 11 空洞效应影响区域

Figure 11. Region affected by cavity effect

下载: 全尺寸图片幻灯片

图 12 振动衰减规律拟合

Figure 12. Fitting of vibration decay law

下载: 全尺寸图片幻灯片

图 13 峰值振速与爆心距的关系

Figure 13. Peak vibration veloctiy versus blast distance

下载: 全尺寸图片幻灯片

表 1 上台阶爆破参数

Table 1. Blasting parameters of upper bench

No.	Blast hole	Blast hole depth/m	Quantity of blast holes	Single hole charge/kg
1	Empty hole	1.0	1	0
2	Cut hole	1.2	4	0.25
3	Auxiliary hole	1.0	11	0.20
4	Peripheral hole	1.0	9	0.20
5	Bottom hole	1.0	7	0.25

下载: 导出CSV

表 2 数值模拟参数

Table 2. Numerical simulation parameters

Material	Density/(g·m⁻³)	E/GPa	μ	c/MPa	φ/(°)
Fill stratum	1.98	0.044	0.28
Clay	1.98	0.039	0.35	0.035	15
Weathered sandstone	2.70	50	0.25	5.5	43
Lining	2.60	32	0.20

下载: 导出CSV

表 3 数值模拟与现场监测数据对比

Table 3. Comparison of numerical simulation and field monitoring data

Method	Monitoring	v_x_,max/(cm·s⁻¹)	v_y_,max/(cm·s⁻¹)	v_z_,_max/(cm·s⁻¹)	v_r_,max/(cm·s⁻¹)
Field experiment	C-1	0.301	0.252	0.247	0.313
	C-2	0.146	0.083	0.183	0.240
	C-3	0.057	0.078	0.123	0.156
Numerical simulation	C-1	0.322	0.243	0.354	0.394
	C-2	0.157	0.056	0.180	0.254
	C-3	0.054	0.047	0.130	0.147

下载: 导出CSV

参考文献(15)

[1]	张继春, 曹孝君, 郑爽英, 等. 浅埋隧道掘进爆破的地表震动效应试验研究 [J]. 岩石力学与工程学报, 2005, 24(22): 4158–4163. doi: 10.3321/j.issn:1000-6915.2005.22.024 ZHANG J C, CAO X J, ZHENG S Y, et al. Experimental study on surface vibration effect of blasting in shallow buried tunnel boring [J]. Journal of Rock Mechanics and Engineering, 2005, 24(22): 4158–4163. doi: 10.3321/j.issn:1000-6915.2005.22.024
[2]	郭得福, 黄博, 高文乐, 等. 浅埋隧洞爆破施工引起的振动效应 [J]. 工程爆破, 2017, 23(1): 71–76. doi: 10.3969/j.issn.1006-7051.2017.01.015 GUO D F, HUANG B, GAO W L, et al. Vibration effects caused by blasting construction in shallow buried tunnels [J]. Engineering Blasting, 2017, 23(1): 71–76. doi: 10.3969/j.issn.1006-7051.2017.01.015
[3]	郭辉, 张继春, 俞定, 等. 爆破地震波作用下浅埋隧道地表振动的空洞效应研究 [J]. 路基工程, 2017(4): 151–154. GUO H, ZHANG J C, YU D, et al. Study on the cavity effect of surface vibration in shallow buried tunnels under the action of blasting seismic waves [J]. Roadbed Engineering, 2017(4): 151–154.
[4]	刘光汉, 周建敏, 余红兵. 浅埋隧道掘进爆破空洞效应研究 [J]. 采矿技术, 2017, 17(5): 112–113. doi: 10.3969/j.issn.1671-2900.2017.05.037 LIU G H, ZHOU J M, YU H B. Research on blast cavity effect in shallow buried tunnel boring [J]. Mining Technology, 2017, 17(5): 112–113. doi: 10.3969/j.issn.1671-2900.2017.05.037
[5]	李志堂, 尹荣申, 孟亚锋, 等. 土岩交错地层隧道爆破施工的振动响应及空洞效应分析 [J]. 隧道建设, 2018, 38(4): 588–593. LI Z T, YIN R S, MENG Y F, et al. Analysis of vibration response and cavitation effect of tunnel blasting construction in soil-rock interlaced strata [J]. Tunnel Construction, 2018, 38(4): 588–593.
[6]	石连松, 高文学, 王林台. 地铁浅埋隧道爆破振动效应试验与数值模拟研究 [J]. 北京理工大学学报, 2018, 38(12): 1237–1243. SHI L S, GAO W X, WANG L T. Experimental and numerical simulation study of blasting vibration effects in shallow buried underpass tunnels [J]. Journal of Beijing University of Technology, 2018, 38(12): 1237–1243.
[7]	刘志波. 莲花山隧道爆破振动效应试验研究 [J]. 爆破, 2020, 37(3): 78–84. doi: 10.3963/j.issn.1001-487X.2020.03.013 LIU Z B. Experimental study of blasting vibration effect in Lotus Hill tunnel [J]. Blasting, 2020, 37(3): 78–84. doi: 10.3963/j.issn.1001-487X.2020.03.013
[8]	冯小冬. 地铁钻爆法施工对邻近建筑物的振动响应预测 [J]. 地下空间与工程学报, 2021, 17(2): 580–589. FENG X D. Prediction of vibration response of subway construction by drill-and-blast method on adjacent buildings [J]. Journal of Underground Space and Engineering, 2021, 17(2): 580–589.
[9]	中国工程爆破协会. 爆破安全规程: GB 6722—2014 [S]. 北京: 中华人民共和国国家质量监督检验检疫总局, 2014.
[10]	ZHU B, JIANG N, ZHOU C, et al. Dynamic failure behavior of buried cast iron gas pipeline with local external corrosion subjected to blasting vibration [J]. Journal of Natural Gas Science and Engineering, 2021.
[11]	中国建筑科学研究院. 混凝土结构设计规范: GB 50010—2015 [S]. 北京: 中华人民共和国住房和城乡建设部, 2015.
[12]	孔丹丹, 赵颖华, 王萍, 等. 钢筋混凝土材料有限元分析中的等效模量方法 [J]. 沈阳建筑大学学报(自然科学版), 2005, 21(3): 200–203. KONG D D, ZHAO Y H, WANG P, et al. Equivalent modulus method in finite element analysis of reinforced concrete materials [J]. Journal of Shenyang University of Architecture (Natural Science Edition), 2005, 21(3): 200–203.
[13]	吕国鹏, 周传波. 隧道断层带注浆加固围岩体爆破动力损伤特征 [J]. 岩石力学与工程学报, 2021, 40(10): 2038−2047. LÜ G P, ZHOU C B. Blasting dynamic damage characteristics of grouting reinforced surrounding rock mass in tunnel fault zone [J]. Chinese Journal of Rock Mechanics and Engineering, 2021, 40(10): 2038−2047.
[14]	罗杰峰. 隧道掘进爆破合理微差时间研究 [D]. 长沙: 长沙理工大学, 2014. LUO J F. Research of reasonable millisecond delay time with tunneling blasting [D]. Changsha: Changsha University of Science and Technology, 2014.
[15]	蔡军, 苏莹, 邱秀丽. 爆破荷载作用下空洞效应对围岩振动速度的影响[J]. 矿冶工程, 2021, 41(5): 10−13, 17. CAI J, SU Y, QIU X L. Influence of cavity effect on vibration velocity of surrounding rock under blasting load [J]. Mining and Metallurgy Engineering, 2021, 41(5): 10−13, 17.