爆破地震荷载作用下高密度聚乙烯波纹管动力响应试验研究

张玉琦; 蒋楠; 贾永胜; 周传波; 罗学东; 吴廷尧

doi:10.11883/bzycj-2019-0399

爆破地震荷载作用下高密度聚乙烯波纹管动力响应试验研究

doi: 10.11883/bzycj-2019-0399

张玉琦^1,,
蒋楠^{1, 2, 3, ,},
贾永胜^{2, 3},
周传波¹,
罗学东¹,
吴廷尧¹

1.
中国地质大学（武汉）工程学院，湖北武汉 430074
2.
江汉大学工程爆破湖北省重点实验室，湖北武汉 430024
3.
武汉爆破有限公司，湖北武汉 430024

基金项目: 国家自然科学基金（41807265、41972286）；中央高校基本科研业务费专项资金资助项目（CUGQY1931）

详细信息

作者简介:
张玉琦（1995－　），男，硕士研究生，yuqiz@cug.edu.cn

通讯作者:
蒋　楠（1986－　），男，博士，副教授，happyjohn@foxmail.com

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2019-10-18
- 修回日期: 2020-05-24
- 网络出版日期: 2020-08-25
- 刊出日期: 2020-09-01

Experimental study on dynamic response of high-density polyethylene bellows under blasting seismic load

ZHANG Yuqi^1
,,
JIANG Nan^{1, 2, 3
, ,},
JIA Yongsheng^{2, 3},
ZHOU Chuanbo¹,
LUO Xuedong¹,
WU Tingyao¹

1.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, Hubei, China
2.
Hubei Key Laboratory of Engineering Blasting, Jianghan University, Wuhan, 430024, Hubei, China
3.
Wuhan Explosion & Blasting Co., Ltd, Wuhan, 430023, Hubei, China

摘要

摘要: 为研究爆破地震荷载作用下埋地高密度聚乙烯（high-density polyethylene，HDPE）波纹管的动力响应规律，通过现场预埋管道的爆破试验，结合爆破地震与动态应变等测试手段，分析了爆破地震荷载作用下埋地管道的动力响应特征，研究了管道振动速度及动态应变的分布特征，基于von Mises屈服准则分析评价了管道安全性，提出了爆破振动速度控制标准。试验研究结果表明：试验中管道与地表振速以及管道动态应变随爆心距的减少，随炸药量的增加而增大；爆破地震波振动主频高，管道振动主频高于地表；相同爆破工况条件下，管道上方地表振速普遍大于管道振速；管道截面背爆侧峰值轴向应变以拉应变为主，迎爆侧峰值环向应变以压应变为主；本试验管道安全控制振速可取20 cm/s，此时管道处于安全状态。
- 爆破地震 /
- HDPE波纹管 /
- 现场试验 /
- 响应特征 /
- 安全控制
Abstract: The dynamic response of buried high density polyethylene (HDPE) bellows under blasting seismic load was studied. First, the blasting test of buried pipeline was carried out by combining the blasting seismic test and dynamic strain test. Secondly, the dynamic response characteristics of buried pipeline under blasting seismic load were analyzed. Then, the characteristics of vibration velocity and dynamic strain distribution were studied. Finally, the pipe safety was evaluated based on the von Mises yield criterion, and the blasting vibration velocity control standard was proposed. The experimental results show that the vibration velocity of pipeline and ground and the dynamic strain of pipeline increase with the decrease of core distance and the increase of explosive quantity. The dominant frequency of blasting seismic wave is higher. The dominant frequency of pipeline is higher than the surface. Under the same blasting condition, the ground vibration velocity above the pipeline is generally higher than that of the pipeline. The peak axial strain on the back explosion side of the pipeline section is mainly tensile strain, and the peak circumferential strain on the front explosion side is mainly compressive strain. The vibration velocity of the pipeline can be safely controlled by 20 cm·s⁻¹, and the pipeline is in a safe state.
- blasting earthquake /
- HDPE bellows /
- field test /
- response characteristics /
- safety control

HTML全文

图 1 管道尺寸示意（cm）

Figure 1. Pipe size diagram (cm)

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图 2 现场试验示意图

Figure 2. Field test diagram

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图 3 振动速度测点示意图

Figure 3. Vibration velocity measuring point diagram

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图 4 动应变测点示意图

Figure 4. Dynamic strain measurement point diagram

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图 5 爆破实验方案设计流程

Figure 5. Blasting experiment plan design flow

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图 6 测点峰值振速

Figure 6. Peak particle velocities

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图 7 主频率分布

Figure 7. Dominant frequency distribution

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图 8 截面A各测点峰值应变

Figure 8. Peak strain at each measuring point of section A

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图 9 管道与地表振速拟合直线

Figure 9. Pipeline and surface vibration fit curve

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图 10 管道振速与轴向、环向应变拟合直线

Figure 10. Straight line fitting of pipe vibration velocity with axial and circumferential strain

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图 11 管道应力方向示意图

Figure 11. Schematic diagram of pipeline stress direction

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表 1 工况参数

Table 1. Working condition parameter

工况	炸药埋深/m	炸药量/kg	水平距离/m
1	6.5	8	25
2	6.5	8	20
3	6.5	8	15
4	6.5	8	10
5	4	8	25
6	4	8	20
7	4	8	15
8	4	8	10
9	4	9.6	5

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表 2 地表合振动速度峰值

Table 2. Resultant peak velocity at surface

工况	测点D₆速度/(cm·s^-1)	测点D₇速度/(cm·s^-1)	测点D₃速度/(cm·s^-1)
1	4.44	5.80	4.92
2	3.60	4.71	3.67
3	7.85	8.87	7.58
4	11.37	12.54	8.89
5	4.86	3.69	3.05
6	4.74	3.73	3.01
7	7.41	7.38	4.34
8	15.20	16.54	11.61
9	28.06	32.71	15.30

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