管道穿越对煤系土河床冲刷深度的影响

王心龙; 孙平贺; 赵明哲; 王靖源; 邢世宽

doi:10.12363/issn.1001-1986.21.10.0581

管道穿越对煤系土河床冲刷深度的影响

王心龙^{1, 2,},
孙平贺^{1, 2, ,},
赵明哲³,
王靖源⁴,
邢世宽^{1, 2}

1.
中南大学地球科学与信息物理学院，湖南长沙 410083
2.
有色金属成矿预测与地质环境监测教育部重点实验室，湖南长沙 410083
3.
中交第三公路工程局有限公司，北京 100000
4.
广西交通设计集团有限公司，广西南宁 530000

基金项目: 国家重点研发计划课题(2020YFC1807203)；中南大学研究生自主探索创新项目(2020zzts665)；中交三公局基础工程废弃泥浆固化处理技术研究项目(3GS-TL-QT-10-2020)

详细信息

作者简介:
王心龙，1996年生，男，安徽滁州人，硕士研究生，研究方向为非开挖及钻井液技术研究. E-mail：pupilwxl@csu.edu.cn

通讯作者:
孙平贺，1982年生，男，吉林松原人，博士，教授，从事非开挖、矿产地质及非常规能源钻进技术的教学与科研工作. E-mail：pinghesun@csu.edu.cn

中图分类号: TV141
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出版历程
- 收稿日期: 2021-10-21
- 修回日期: 2021-12-24
- 网络出版日期: 2022-06-14
- 发布日期: 2022-06-24

Influence of pipeline crossing on riverbed scouring depth of coal measure soil

WANG Xinlong^{1, 2,},
SUN Pinghe^{1, 2, ,},
ZHAO Mingzhe³,
WANG Jingyuan⁴,
XING Shikuan^{1, 2}

1.
School of Geosciences and Info-physics, Central South University, Changsha 410083, China
2.
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Changsha 410083, China
3.
CCCC Third Highway Engineering Co. Ltd., Beijing 100000, China
4.
Guangxi Communications Design Group Co. Ltd., Nanning 530000, China

摘要

摘要: 为研究管道穿越煤系土河床后对冲刷深度的影响，基于室内构建的煤系黏土质和砂质河床模型试验装置，设置不同管道埋深、管径大小和冲刷流速进行冲刷模拟试验，并利用SPSS 25.0软件对河床冲刷深度与以上3个因素进行多元线性回归分析。结果表明：管道埋深、管径大小和冲刷流速3个因素能够解释冲刷深度71.4%~80.6%的变化，管道埋深显著负向影响冲刷深度，管径大小和冲刷流速显著正向影响冲刷深度。管道穿越会破坏河床颗粒间的原始胶结状态，强化水流的冲刷作用。利用所得线性回归方程对珠海市某管道穿越工程进行安全性验证，考虑了管道埋深与管径大小对冲刷深度的影响，验证结果证明了回归方程的可行性。研究成果为管道穿越工程设计提供一定参考。
- 管道穿越 /
- 煤系土 /
- 黏土质河床 /
- 砂质河床 /
- 冲刷深度 /
- 多元线性回归
Abstract: For the purpose of studying the influence of pipeline crossing on the riverbed scouring depth of the coal measure soil, different pipeline depths, pipe diameters and scouring velocity were set up to carry out scour simulation tests based on the clay and sandy riverbed model test equipment. The SPSS software was used to perform multiple linear regression analysis on the riverbed scouring depth and the above factors. The results show that the pipeline depth, pipe diameter and scouring velocity are responsible for 71.4% to 80.6% of the change of scour depth. The burial depth significantly and negatively affects the scouring depth; the pipe diameter and scouring velocity significantly and positively affect the scouring depth. Pipeline crossing will destroy the original cement state between the particles of the riverbed and strengthen the scouring effect of the water flow. With the influence of buried depth and pipe diameter on the scour depth being considered, the obtained linear regression equation was used to verify the safety of a pipeline crossing project in Zhuhai City, where the verification results have shown the feasibility of the regression equation. The research results can provide a certain reference for pipeline crossing engineering design.
- pipeline crossing /
- coal measure soil /
- clay riverbed /
- sandy riverbed /
- scouring depth /
- multiple linear regression

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图 1 室内试验模型

Fig. 1 Indoor test model

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图 2 室内试验流程

Fig. 2 Indoor test process

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图 3 黏土质河床模型标准化残差正态概率

Fig. 3 Normal probability diagram of standardized residual error of the clay riverbed model

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图 4 砂质河床模型标准化残差正态概率

Fig. 4 Normal probability diagram of standardized residual error of the sandy riverbed model

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图 5 管道穿越后河床层

Fig. 5 Schematic diagram of riverbed strata after pipeline crossing

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表 1 河床模型物性参数

Table 1 Physical parameters of the riverbed model

颗粒种类	重度$ \gamma $/(kN·m⁻³)	$ {D}_{50} $/mm	压缩前孔隙率/%	含水率/%	压缩后孔隙率/%	黏聚力/kPa	摩擦角/(°)	河床坡降J
黏土质	20.3	0.58	45.3	23.71	37.6	6.24	37.9	0.013
砂质	23.7	0.30	48.7	21.36	42.0	—	35.0	0.013

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表 2 河床模型试验参数

Table 2 Model test parameters of clay riverbed

黏土质河床			砂土质河床
管道直径/cm	水流流速ν/ (cm·s⁻¹)	管道埋深h/cm	管道直径/cm	水流流速ν/ (cm·s⁻¹)	管道埋深h/cm
5.0	15	10	5.0	10	10
5.0	15	15	5.0	10	15
5.0	15	20	5.0	10	20
5.0	15	25	5.0	10	25
5.0	20	10	5.0	15	10
5.0	20	15	5.0	15	15
5.0	20	20	5.0	15	20
5.0	20	25	5.0	15	25
7.5	15	10	7.5	10	10
7.5	15	15	7.5	10	15
7.5	15	20	7.5	10	20
7.5	15	25	7.5	10	25
7.5	20	10	7.5	15	10
7.5	20	15	7.5	15	15
7.5	20	20	7.5	15	20
7.5	20	25	7.5	15	25
11.0	15	10	11.0	10	10
11.0	15	15	11.0	10	15
11.0	15	20	11.0	10	20
11.0	15	25	11.0	10	25
11.0	20	10	11.0	15	10
11.0	20	15	11.0	15	15
11.0	20	20	11.0	15	20
11.0	20	25	11.0	15	25

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表 3 黏土质河床模型线性回归分析结果

Table 3 Linear regression analysis results of the clay riverbed model

R	R²	调整后 R²	标准估计误差	DW
0.867^a	0.752	0.714	0.35605	2.739

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表 4 黏土质河床模型系数

Table 4 Model coefficients of the clay riverbed

因素	B	t	显著性系数	容差	VIF
常量	2.868	4.719	0	—	—
管径	0.084	2.844	0.01	1.000	1.000
埋深	−0.088	−6.787	0	1.000	1.000
流速	0.074	2.528	0.02	1.000	1.000

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表 5 砂质河床模型线性回归分析结果

Table 5 Linear regression analysis results of the sandy riverbed model

R	R²	调整后 R²	标准估计误差	DW
0.912^a	0.831	0.806	0.23242	2.355

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表 6 砂质河床模型系数

Table 6 Coefficients of the sandy riverbed model

因素	B	t	显著性系数	容差	VIF
常量	2.808	8.733	0	—	—
管径	0.093	3.781	0.001	1.000	1.000
埋深	−0.089	−8.606	0	1.000	1.000
流速	0.061	3.206	0.004	1.000	1.000

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表 7 不同地层管道穿越河流的可行性评价

Table 7 Feasibility evaluation of pipeline crossing river in different strata

地层条件	适用	有一定难度	不适用
淤泥、软黏土和有机堆积物		√
中硬−硬质黏土和淤泥	√
硬黏土和强风化泥页岩	√
非常松散−松散的砂层(砾石质量分数<30%)		√
中−致密的砂层(砾石质量分数<30%)	√
松散−密实的砾石砂层(30%<砾石质量分数<50%)		√
松散−密实的砾石砂层(50%<砾石质量分数<85%)			√
松散−密实的卵砾石层			√
含有大量孤石、漂石等其他障碍物地层			√
风化岩层或强胶结地层	√
弱风化或未风化地层		√

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