Numerical Simulation Research on Submarine Foundation Pit Excavation based on Energy Dissipation Blasting Technology

Numerical Simulation Research on Submarine Foundation Pit Excavation based on Energy Dissipation Blasting Technology

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Teng-fei LI^1a^,^1b, Dong-wang ZHONG^1a^,^1b, Jian-feng SI^1a^,^1b, Wei XIONG^1a^,^1b, Li HE^1a^,^1b^,², Lin-na LI^1a^,^1b, Sheng-wu TU^1a^,^1b

Blasting | 2023, 40(1) : 139 - 146

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Blasting | 2023, 40(1): 139-146

• SPECIAL BLASTING •

Numerical Simulation Research on Submarine Foundation Pit Excavation based on Energy Dissipation Blasting Technology

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Teng-fei LI^1a^,^1b, Dong-wang ZHONG^1a^,^1b, Jian-feng SI^1a^,^1b, Wei XIONG^1a^,^1b, Li HE^1a^,^1b^,², Lin-na LI^1a^,^1b, Sheng-wu TU^1a^,^1b

Affiliations

^1a.College of Science, Wuhan University of Science and Technology, Wuhan 430065, China

^1b.Hubei Province Intelligent Blasting Engineering Technology Research Center, Wuhan University of Science and Technology, Wuhan 430065, China

^2.Hubei Province Key Laboratory of Systems Science in Metallurgical Process, Wuhan 430065, China

Published: 2023-03-01 doi: 10.3963/j.issn.1001-487X.2023.01.019

Outline

Abstract

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Rock foundation excavation plays an important role in the entire project of hydraulic structures. The key and difficult point of the blasting excavation is how to reduce the damage of the rock mass on the foundation surface under the premise of ensuring the excavation of the structural foundation to the specified elevation. In this paper, ANSYS/LS-DYNA finite element software is used to numerically simulate the blasting damage of the rock mass 40 m underwater. The blasting and excavation simulation of composite energy dissipation structure, flexible cushion and traditional charge structure is carried out in a 24.5 cm×24.5 cm×30 cm rock mass model, respectively. Fluid-structure coupling algorithm is used in the simulation process, and 0.4 MPa water pressure is added to simulate the 40 m water depth environment. The simulation results found that the damage depth of the basement, the energy transfer of the retained bedrock and the damage degree of the retained bedrock can be reduced by 38.89%, 30.52%, and 30.90% respectively by using the composite energy dispassion blasting technology under the same conditions. The results also show that the energy dissipation structure can effectively control the damage form and scope of the rock mass retained on the foundation surface, which can be applied to the protection of foundation surface of underwater rock excavation.

Key words

submarine foundation excavation / composite energy dissipation / rock mass damage / axial stress attenuation / numerical simulation

Cite this Article

Teng-fei LI, Dong-wang ZHONG, Jian-feng SI, Wei XIONG, Li HE, Lin-na LI, Sheng-wu TU. Numerical Simulation Research on Submarine Foundation Pit Excavation based on Energy Dissipation Blasting Technology[J]. Blasting, 2023 , 40 (1) : 139 -146 . DOI: 10.3963/j.issn.1001-487X.2023.01.019

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Year 2023 volume 40 Issue 1

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Article Info

doi: 10.3963/j.issn.1001-487X.2023.01.019

Receive Date：2022-09-25
Online Date：2026-03-19
Published：2023-03-01

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History

Received：2022-09-25

Funding

Affiliations

^1a.College of Science, Wuhan University of Science and Technology, Wuhan 430065, China

^1b.Hubei Province Intelligent Blasting Engineering Technology Research Center, Wuhan University of Science and Technology, Wuhan 430065, China

^2.Hubei Province Key Laboratory of Systems Science in Metallurgical Process, Wuhan 430065, China

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表12种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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