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Numerical Experiments of Dynamic Response of Buried Gas Pipeline under the Action of Seismic Waves Induced by Tunnel Blasting

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书 书 书

52

 

2017

       

西

 

 

 

 

 

 

 

JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY

        Vol. 52  No. 2 Apr. 2017

稿

20151207

:中

2682013CX050

);国

41272322

:郑

1965

),女

,副

,博

,研

Email

zsy200410@ 126. com

:郑

,杨

西

2017

52

):

264271. ZHENG Shuangying

YANG Lizhong. Numerical experiments of dynamic response of buried gas pipeline under the action of seismic waves induced by tunnel blasting

. Journal of Southwest Jiaotong University

2017

52

):

264271.    

02582724

2017

02026408    DOI

10. 3969 / j. issn. 02582724. 2017. 02. 008

隧道爆破地震下输气管道

动力响应数值试验

 

1.

西

,四

川成

610031

2.

西

,四

610031

 

:为

,明

穿

,基

线

,按

、厚

、管

、管

、运

:管

、壁

,并

线

;爆

7 MPa

290. 73 MPa

0. 001 4

,小

0. 002 3

;输

6%

;输

:隧

;爆

;埋

;正

;动

;运

O382. 2   

Numerical Experiments of Dynamic Response of

Buried Gas Pipeline under the Action of

Seismic Waves Induced by Tunnel Blasting

ZHENG Shuangying

  YANG Lizhong

1. School of Civil Engineering

Southwest Jiaotong University

Chengdu 610031

China

2. Faculty of Geosciences and Environmental Engineering

Southwest Jiaotong University

Chengdu 610031

China

Abstract

In order to reasonably determine the vibration control standard of buried gas transmission

pipeline under the action of seismic waves from blasting

it is important to clarify how the operating

parameters of pipeline affect its dynamic response. Taking Xiannvyan tunnel blasting project as

example

the tunnel passes beneath a buried gas pipeline

),

and based on the nonlinear dynamic finite

element method and the principle of the orthogonal experiment

the numerical experiments on the

dynamic response of a buried gas pipeline were carried out. Using the range analysis method

five

parameters of pipeline including the outside diameter

wall thickness

buried depth

clear distance

between pipeline center and tunnel top as well as operating internal pressure were sorted according to

their effects on the response characteristics of pipe stress and vibration velocity . The results show that

the peak of the maximum principal stress is mainly affected by the operating internal pipeline pressure

and wall thickness

which has obviously linear relationship with the operating internal pressure. Under

(2)

,等

:隧

the action of blastinginduced seismic waves

when the operating internal pressure is 7 MPa

the peak

of maximum principal stress is 290. 73 MPa and the maximum tensile strain is 0. 001 4

which is less

than the elastic strain limit of gas pipeline 0. 002 3. The characteristics of the pipeline dynamic

response mainly depend on its structure

and the pipeline dynamic stress caused by blasting vibration is

less than 6% of pipeline allowable stress. The maximum dynamic stress of the gas pipeline can be

estimated by the superposing the dynamic maximum principal stress of the pipeline without operating

pressure and its static principal stress with operating pressure.

Key words

tunneling

blastinginduced seismic waves

buried gas pipeline

orthogonal numerical

experiment

dynamic response

operating internal pressure

   

,不

,也

,爆

、生

、难

、现

. Kouretzis

,利

Nourzadeh

,采

Robert

沿

,给

、爆

、爆

、管

12. 5 ~ 25 cm / s

安全控制标准

Ganster

结合临近高压埋

,通

,得

;梁

、张

、唐

57

,进

,给

2 ~ 3 cm / s

,在

. Jong

,通

,给

;王

用动力有限元法实现了爆炸

(空

)的

;纪

10

壁厚条件下的动力响应特征

;赵长

、李

又绿

、刘建民等

1113

利用

LSDYNA

方法分

,按

,未

,就

、运

、埋

、爆

、地

,至

西

线

,借

ANSYS / LSDYNA

,采

,分

1 

1. 1 

   

西

,隧

5 633. 4 m

,开

10. 5 m

、宽

12. 8 m

,在

DK431 + 420 ~ 500

穿

X70

),该

,岩

,属

Ⅳ ~ Ⅴ

、建

、模

、材

、边

献[

14

]相

,运

,爆

17 kg

、孔

1. 8 m

10

1. 2 

   

,借

,既

,又

,并

15

(3)

西

 

 

 

 

 

 

 

52

1 

(单

Fig. 1  Model dimension for orthogonal numerical experiment

unit

   

试验选取的主要因素有钢管直径

Φ

、管壁

δ

、管

Η

、隧

、运

P.

、埋

、运

,并

,并

16

)正

,如

1 

Tab. 1  Factors and levels of orthogonal numerical experiment

平 钢

/ mm

/ mm

/ m

/ m

/ MPa 1 450 6 1. 2 20 1 2 500 8 1. 5 25 3 3 550 10 1. 8 30 5 4 600 12 2. 1 35 7

2 

Tab. 2  Scheme and results of orthogonal numerical experimental

/ mm

/ mm

/ m

/ m

/ MPa

/ MPa

cm

·

s- 1

1 450 6 1. 2 20 1 51. 85 - 3. 64 36. 84 27. 15 2 450 8 1. 5 25 3 86. 50 - 2. 40 18. 05 30. 47 3 450 10 1. 8 30 5 115. 32 - 3. 81 19. 12 25. 98 4 450 12 2. 1 35 7 132. 52 - 5. 29 19. 21 18. 94 5 500 6 1. 8 25 7 290. 73 - 5. 30 18. 47 13. 86 6 500 8 2. 1 20 5 159. 17 - 5. 35 35. 78 26. 37 7 500 10 1. 2 35 3 76. 89 - 2. 26 20. 43 11. 57 8 500 12 1. 5 30 1 26. 74 - 8. 76 21. 88 13. 75 9 550 6 2. 1 30 3 138. 67 - 2. 59 29. 75 11. 33 10 550 8 1. 8 35 1 37. 91 - 1. 03 19. 18 16. 10 11 550 10 1. 5 20 7 193. 20 - 5. 27 33. 80 28. 80 12 550 12 1. 2 25 5 114. 91 - 3. 78 19. 02 25. 45 13 600 6 1. 5 35 5 250. 02 - 3. 80 18. 95 24. 91 14 600 8 1. 2 30 7 261. 02 - 5. 67 27. 10 31. 30 15 600 10 2. 1 25 1 35. 29 - 8. 12 18. 58 29. 54 16 600 12 1. 8 20 3 80. 55 - 2. 87 33. 17 27. 94

   

,并

,因

、最

、管

、地

,计

2 

   

,极

,则

,由

1516

2. 1 

   

,求

、最

小主应力峰值的直观分析结果如

:各

,其

,其

(4)

,等

:隧

、管

、隧

,说

,管

,隧

;管

,各

2. 86.

3 

Tab. 3  Analysis of stress peak for buried pipeline from numerical experiments        MPa

96. 55 138. 38 121. 17 156. 72 60. 17 - 3. 79 - 5. 42 - 3. 17 - 5. 12 2. 25

182. 82 136. 15 105. 18 88. 68 94. 14 - 3. 83 - 3. 62 - 4. 87 - 5. 18 1. 56

121. 19 131. 86 135. 44 124. 34 14. 25 - 4. 29 - 4. 90 - 5. 21 - 3. 10 2. 11

126. 17 139. 12 131. 13 116. 41 22. 70 - 3. 84 - 5. 06 - 3. 25 - 5. 34 2. 09

37. 95 95. 65 159. 86 219. 37 181. 42 - 5. 39 - 2. 53 - 4. 19 - 5. 38 2. 86

2 

线

Fig. 2  Curves of various factors affecting stress peak of pipeline

   

:最

线

,说

较为明显的下降趋势

;随

;随着管径增

,最

(5)

西

 

 

 

 

 

 

 

52

,最

,管

450 mm

600 mm

,管

96. 55 MPa

156. 72 MPa

,增

62. 32% .

,爆

,管

,而

290. 73 MPa

(约

60%

),相

0. 001 4.

由于

X70

钢的极限弹性应变为

0. 002 3

、容

0. 03

17

,说

用下管道仍属于弹性变形

,且具有较高的安全

,在

,与

20 m

2. 2 

   

值振速的直观分析结果列于表

3 

线

Fig. 3  Curves of various factors affecting the PPV of pipeline and ground surface

   

:管

,其

,依

、管

、运

;管

,这

,而

(6)

,等

:隧

,管

;随 着

,管

4 

Tab. 4  Test results of PPV for buried pipeline and ground surface from numerical experiments  cm

·

s- 1

23. 31 24. 14 25. 44 24. 45 2. 13 25. 64 16. 39 20. 42 28. 42 12. 03

26. 00 25. 03 22. 98 23. 32 3. 02 19. 31 26. 06 23. 97 21. 52 6. 75

34. 90 18. 53 24. 46 19. 44 16. 37 27. 56 24. 83 20. 59 17. 88 9. 68

25. 85 23. 17 22. 49 25. 83 3. 36 23. 87 24. 48 20. 97 21. 55 3. 51

24. 12 25. 35 23. 22 24. 65 2. 13 21. 64 20. 33 25. 68 23. 22 5. 35

3 

对管道动应力

   

,管

,以

500 mm

、管

1. 2 m

、隧

20 m

,针

10 mm

,得

力(静

)及

(无

)在

,图

,管

线

,其

、静

20 MPa

,其

6%

,且

,相

,然

,二

,管

,相

,因

,使

,而

,爆

,爆

5 

Tab. 5  Results of maximum principal stress for numerical simulation and stress superposition MPa

6 mm

8 mm

10 mm

7. 70 7. 70

6. 39 6. 39

8. 84 8. 84

1 40. 07 50. 83 47. 77 6. 02 30. 11 36. 59 36. 50 0. 25 24. 34 31. 62 33. 18 4. 93 3 118. 80 129. 90 126. 50 2. 62 90. 46 97. 30 96. 85 0. 46 73. 17 79. 48 82. 01 0. 67 5 198. 11 211. 10 205. 81 2. 51 150. 80 159. 17 157. 19 1. 24 121. 56 127. 76 130. 40 2. 07 7 273. 37 292. 23 281. 07 3. 82 211. 21 245. 31 217. 60 11. 30 168. 78 176. 15 177. 62 0. 83    

:相

× 100% /

   

0. 25% ~ 5%

,说

,这

,管

线

40. 27

34. 40

24. 09

,叠

线

38. 96

30. 18

22. 70

,二

参照

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