Lateral deviation model test of temporary anchorage system for immersed tube in Shenzhen-Zhongshan Link

YAN Lei; HAN Heng; HE Shuan-hai; XU Guo-ping; DENG Bin; YAN Jin-ning; XIN Shi-hao

doi:10.19818/j.cnki.1671-1637.2023.05.008

Volume 23 Issue 5

Oct. 2023

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Article Navigation > Journal of Traffic and Transportation Engineering > 2023 > 23(5): 129-142

YAN Lei, HAN Heng, HE Shuan-hai, XU Guo-ping, DENG Bin, YAN Jin-ning, XIN Shi-hao. Lateral deviation model test of temporary anchorage system for immersed tube in Shenzhen-Zhongshan Link[J]. Journal of Traffic and Transportation Engineering, 2023, 23(5): 129-142. doi: 10.19818/j.cnki.1671-1637.2023.05.008

Citation:

YAN Lei, HAN Heng, HE Shuan-hai, XU Guo-ping, DENG Bin, YAN Jin-ning, XIN Shi-hao. Lateral deviation model test of temporary anchorage system for immersed tube in Shenzhen-Zhongshan Link[J]. Journal of Traffic and Transportation Engineering, 2023, 23(5): 129-142. doi: 10.19818/j.cnki.1671-1637.2023.05.008

Citation:

YAN Lei, HAN Heng, HE Shuan-hai, XU Guo-ping, DENG Bin, YAN Jin-ning, XIN Shi-hao. Lateral deviation model test of temporary anchorage system for immersed tube in Shenzhen-Zhongshan Link[J]. Journal of Traffic and Transportation Engineering, 2023, 23(5): 129-142. doi: 10.19818/j.cnki.1671-1637.2023.05.008

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Lateral deviation model test of temporary anchorage system for immersed tube in Shenzhen-Zhongshan Link

doi: 10.19818/j.cnki.1671-1637.2023.05.008

YAN Lei^{1, 2
,},
HAN Heng^{1, 2},
HE Shuan-hai^{1, 2},
XU Guo-ping³,
DENG Bin³,
YAN Jin-ning^{1, 2},
XIN Shi-hao^{1, 2}

1.
School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
2.
Key Laboratory of Transport Industry of Bridge Detection Reinforcement Technology, Chang'an University, Xi'an 710064, Shaanxi, China
3.
CCCC Highway Consultants Co., Ltd., Beijing 100088, China

Funds:

National Key Research and Development Program of China 2021YFB1600300

Key Areas Research and Development Program of Guangdong Province 2019B111105002

Scientific Research Project of Department of Transport of Shaanxi Province 21-63K

More Information

Author Bio:
YAN Lei(1979-), male, associate professor, PhD, yanlei@chd.edu.cn
Received Date: 2023-04-28
Available Online: 2023-11-17
Publish Date: 2023-10-25

Abstract

Abstract

To find out the lateral deviation limit of the anchorage system during the jointing construction of the immersed tube in Shenzhen-Zhongshan Link, the displacement ability of the anchorage system was studied by the combination of numerical simulation and model test. The finite element model of the anchorage system was established, and the loading grading standard of the full-scale model test was determined based on the finite element analysis results. In view of the actual stress state of the anchorage system, the axial load grade of the tie rod was determined. The test simulated the initial installation deviations of 5 cm in horizontal and vertical directions, and the structure was loaded in four working conditions. In addition, the stress and displacement were tested. Research results show that under the given axial load of the tie rod, the safety reserve of the anchorage system decreases gradually with the increase in the lateral deviation. Under the axial test load of 1 000 kN of a single tie rod and the lateral deviation of 5 cm, the structure is in an elastic working state, and the maximum Mises stresses of the anchor plate and rib plate reach 190.8 and 179.3 MPa, respectively. The safety reserves relative to their design strengths of 295 and 280 MPa are 35.3% and 36.0%, respectively. Under 1.2 and 1.5 times of the axial test load, when the lateral deviation is applied to 5 cm, the anchorage system is still in an elastic working state. The maximum Mises stresses of the anchor plate and rib plate increase from 221.1 and 196.8 MPa to 286.8 and 260.5 MPa, respectively. The average designed safety reserve decreases from 27.4% to 5.0%. The maximum stress of the tie rod increases from 473.8 MPa to 623.7 MPa, and the yield safety reserve decreases from 43.3% to 25.3%. In the limit lateral deviation test, under 1.5 times of the axial test load, the anchor plate reaches the designed strength when the lateral deviation is 6 cm. When it continues to increase to 12.8 cm, the anchor plate yields first, and it is considered that the anchorage system has failed. At this time, the stress of the tie rod is 704.8 MPa, and the yield safety reserve is 15.6%. Therefore, it is recommended that the lateral deviation control value of immersed tubes should be 6 cm during the underwater jointing construction.
- bridge engineering,
- immersed tube,
- anchorage system,
- model test,
- numerical analysis,
- lateral deviation

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References(30)

References

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Lateral deviation model test of temporary anchorage system for immersed tube in Shenzhen-Zhongshan Link

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