爆破地震荷载作用下承插式HDPE管道动力失效机制

张玉琦; 蒋楠; 周传波; 姚颖康; 李海波; 蔡忠伟; 胡宗耀

doi:10.11883/bzycj-2021-0492

爆破地震荷载作用下承插式HDPE管道动力失效机制

doi: 10.11883/bzycj-2021-0492

张玉琦^1,,
蒋楠^{1, 2, ,},
周传波¹,
姚颖康²,
李海波³,
蔡忠伟⁴,
胡宗耀¹

1.
中国地质大学（武汉）工程学院，湖北武汉 430074
2.
江汉大学爆破工程湖北省重点实验室，湖北武汉 430056
3.
中国科学院岩土力学研究所，湖北武汉 430071
4.
中国水利电力对外有限公司，北京 100120

基金项目: 国家自然科学基金（41807265，41972286，42072309）；爆破工程湖北省重点实验室开放基金（HKLBEF202001，HKLBEF202002）

详细信息

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

通讯作者:
蒋　楠（1986－　），男，博士，副教授，jiangnan@cug.edu.cn

中图分类号: O383
计量
- 文章访问数: 211
- HTML全文浏览量: 68
- PDF下载量: 40
- 被引次数: 0
出版历程
- 收稿日期: 2021-11-24
- 录用日期: 2022-11-10
- 修回日期: 2022-01-04
- 网络出版日期: 2022-11-14
- 刊出日期: 2022-12-08

Dynamic failure mechanism of HDPE pipelines with a gasketed bell and spigot joint subjected to blasting seismic load

1.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, Hubei, China
2.
Hubei Key Laboratory of Blasting Engineering, Jianghan University, Wuhan 430056, Hubei, China
3.
Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, China
4.
China International Water & Electric Corporation, Beijing 100120, China

摘要

摘要: 承插式管道接口更易受到外界荷载破坏导致管道失效，为保证爆破开挖过程中邻近承插式高密度聚乙烯（high-density polyethylene，HDPE）波纹管道的安全运营，控制爆破振动荷载对管道的影响是重点关注内容。通过全尺度预埋单段HDPE波纹管道现场试验，得到管道的振动速度和动应变响应数据，结合LS-DYNA数值模拟软件分别建立了无承插接口管道与含弹性密封圈的承插式HDPE波纹管道；利用现场试验数据验证了无承插口管道模型参数的可靠性，并对比分析了承插式管道的结构位移、振动速度、有效应力的响应规律与失效机制；结合现行规范，根据管道响应规律与接口允许旋转角度计算得到了承插式管道的安全振动速度。研究结果表明：有承插口管道的合振速、合位移和有效应力大于无承插口管道；在同一截面上，有承插口管道迎爆侧的合振速和有效应力更大，而最大合位移出现在截面的背爆侧；管道合位移与合振速在轴线中心处截面最大，并向两端不断减小，有承插口管道中心合位移更大；通过接口允许旋转角度得到此类工况条件下的承插式管道的安全振速为24.77 cm/s。
- 承插式接口 /
- HDPE波纹管 /
- 爆破振动荷载 /
- 安全评估
Abstract: Pipelines with a gasketed bell and spigot joint are more vulnerable to external load damage, leading to pipeline failure. To ensure the safe operation of adjacent high-density polyethylene (HDPE) bellows during blasting excavation, control of the influence of blasting vibration load on the pipeline is the main focus. The vibration velocity and dynamic strain response data of the pipeline were collected from the field test of a full-scale embedded single-segment HDPE bellow. The HDPE bellow models without socket contact and with an elastic sealing ring were established using the LS-DYNA numerical simulation software. The reliability of the model parameters of the HDPE bellows without a joint was verified by the field test data, and the response laws and failure mechanisms of the structural displacement, vibration velocity, and effective stress of the HDPE bellows with a gasketed bell and spigot joint were compared and analyzed. The safe vibration velocity of the pipe was determined using the pipeline response law and the allowable rotation angle of the interface in conjunction with the current specification. The research results show that the resultant vibration velocity, resultant displacement, and effective stress of the bellow with a gasketed bell and spigot joint are greater than those of the bellow without a joint. At the same cross-section, the resultant vibration velocity and effective stress on the explosion side of the bellow with a gasketed bell and spigot joint are higher, and the maximum resultant displacement occurs on the back of the explosion side of the cross-section. Along the axis direction of the pipeline, the resultant displacement and the resultant vibration velocity of the pipeline decrease continuously from the center to both ends of the pipeline, and the resultant displacement of the pipeline with a gasketed bell and spigot joint is larger. The safe vibration velocity of the pipeline with a gasketed bell and spigot joint under such working conditions is 24.77 cm/s, according to the allowable rotation angle of the interface.
- gasketed bell and spigot joint /
- HDPE bellow /
- blast vibration loading /
- safety assessment

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图 1 试验背景与管道尺寸

Figure 1. Test background and pipe dimensions

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图 2 动应变测点与振动速度测点

Figure 2. Dynamic strain and vibration velocity measuring points

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图 3 现场试验工况参数及炮孔布置

Figure 3. Field test condition parameters and layout of blastholes

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图 4 整体模型及网格划分

Figure 4. Overall model and grid division

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图 5 数值模拟与现场试验峰值合振速的对比

Figure 5. Comparison of peak resultant vibration velocities between numerical simulation and field test

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图 6 沿管道轴线峰值合振速

Figure 6. Peak resultant vibration velocities along the pipeline axis

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图 7 同一截面管道峰值合振速

Figure 7. Comparison of peak resultant vibration velocities at the same section of different pipelines

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图 8 同一截面管道峰值有效应力

Figure 8. Comparison of peak effective stresses at the same section of different pipelines

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图 9 同一截面管道峰值合位移

Figure 9. Comparison of peak resultant displacements at the same section of different pipelines

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图 10 沿管道轴线峰值合位移

Figure 10. Peak resultant displacement along the pipeline axis

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图 11 承插管道相对位移

Figure 11. Relative displacement of socket pipeline

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图 12 管道旋转角度示意图

Figure 12. Diagram of the rotation angle of the pipeline

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图 13 数据拟合

Figure 13. Data fitting

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图 14 推导公式逻辑关系

Figure 14. Logical relation of formula deduction

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表 1 预埋管道力学参数

Table 1. Mechanical parameters of buried pipeline

材料	弹性模量/MPa	密度/(g·cm⁻³)	环刚度/(kN·m⁻²)	极限强度/MPa	泊松比
HDPE	834.9	0.936	8	31.6	0.46

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表 2 管道、橡胶、粉质黏土与砂岩材料模型参数

Table 2. Parameters of pipeline, rubber, silty clay and sandstone material models

材料	密度/(g·cm⁻³)	弹性模量/GPa	剪切模量/GPa	泊松比	黏聚力/MPa	内摩擦角/(°)	抗拉强度/MPa
管道	0.936	0.834 9		0.46			31.6
粉质黏土	1.980	0.039	4.3	0.35	0.035	15	0.028
砂岩	2.680	52	11.2	0.25	5.5	43	2.58
橡胶	1.200			0.49

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表 3 炸药参数

Table 3. Parameters of the explosive

材料	ρ/(g·cm⁻³)	A/GPa	B/GPa	R₁	R₂	ω	E₀/GPa	V
炸药	1.25	214	18.2	4.2	0.9	0.15	4.19	1

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