Longitudinal mechanical force mechanism and structural design of steel tube slab structures

Lu, Bo; Jia, Pengjiao; Zhao, Wen; Zheng, Qingbin; Du, Xi; Tang, Xiujie

doi:10.1016/j.tust.2022.104883

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…U-steel is a kind of support structure that commonly used in mines and underground caverns. In recent years, the U-steel support structure of rock engineering has attracted much attention from scholars due to its high strength, high rigidity and good mechanical properties (Barla et al, 2011;Wong et al, 2013;Zhao et al, 2015;Cheng et al, 2023a;Cheng et al, 2023b;Lu et al, 2023). Wang et al (2018) studied the deformation and damage zone of soft rock by in-situ acoustic wave testing technology, and proposed a combined support technology with U-steel support and anchor grouting.…”

Section: Introductionmentioning

confidence: 99%

Mechanical performance and failure mechanism of U-steel support structure under blast loading

Zhao,

Yang,

et al. 2024

Front. Earth Sci.

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The U-steel support structures of underground caverns are prone to instability and failure under blast loads. The purpose of the underground cavern reinforcement is to mobilise the self-supporting capacity of the surrounding rock to resist the blast. To better understand the mechanical performance and failure mechanism of the U-steel support, the fracture process and vibration behaviour of the support structure under blast loading are investigated by the microseismic monitoring experiment. The dynamic responses of the cavern support structures under blast loading are investigated, and the potentially hazardous sections of the U-steel support structure are revealed by the theoretical analysis. The microseismic monitoring results show that the blast induced microseismic events are concentrated in the arch shoulder of the small chainage, correspondingly the U-steel structures in this region have been partially extruded and deformed. The failure mechanism of the supporting structure is presented. In order to effectively inhibit the internal fracture evolution or macroscopic failure of the rock mass, the synergetic reinforcement scheme of the structures is proposed. The results of the research can be used as a reference for the design and control method of the U-steel support in similar projects.

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Section: Introductionmentioning

confidence: 99%

Mechanical performance and failure mechanism of U-steel support structure under blast loading

Zhao,

Yang,

et al. 2024

Front. Earth Sci.

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“…The rockbolt structure design should be able to ensure strong deformation ability under high working resistance. In engineering practice, the evolution law of rockburst may be further revealed, allowing reasonable support strategies to reduce potential loss arising from rockburst damage [19][20][21][22][23][24]. Field tests of energy-absorbing rockbolt are required to demonstrate their actual engineering effect.…”

Section: Introductionmentioning

confidence: 99%

Protection Technique of Support System for Dynamic Disaster in Deep Underground Engineering: A Case Study

et al. 2023

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During excavation in a deep tunnel, dynamic disaster is an extremely severe impact failure. The necessity of an energy-absorbing support system is analyzed for different characteristics of dynamic disaster (rockburst) failure. The energy-absorbing support system design includes a combination of early-warning, energy-absorbing bolts, and other components. This support system is designed to meet the energy requirement of a rockburst disaster based on an early warning. The energy-absorbing rockbolt uses the stepwise decoupling technique to realize the brittle-ductile transition of the structure, which is referred to as a stepwise decoupling rockbolt (SD-bolt). The ultimate force, ultimate deformation, and energy were calculated as 241 kN, 442.3 mm, and 95.89 kJ under static pull-out load. Monitored by a microseismic system, the support system was tested by moderate rockburst disaster impact on site. Considering similar rockburst disaster failure cases, this energy-absorbing support system can reduce rockburst disaster damage to a certain extent and improve overall safety during deep engineering construction.

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“…Te main methods for studying on the surrounding stratum self-stabilizing capacity and the deformation characteristics of the multiline parallel pipe-jacking construction include the theoretical analysis method [15][16][17][18][19], model test method [20,21], in situ test method [22,23], and numerical computational method [24][25][26][27][28][29]. At present, the numerical calculation method has become an increasingly important tool in urban underground engineering research due to its advantages of the high speed, high accuracy, low cost, time-saving and labor-saving, and strong adaptability to complex conditions and processes.…”

Section: Introductionmentioning

confidence: 99%

Study on the Division of the Affected Zone under Construction Unloading and Its Construction Sequence of the Multiline Parallel River-Crossing Pipe Jacking

Ziguang,

Ruijin,

Jiesheng

et al. 2023

Advances in Civil Engineering

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There are many advantages of reasonably determining the affected zone and its construction sequence for the multiline parallel pipe-jacking construction, such as convenient to reasonably arrange the pipeline section distribution mode, reducing the construction safety risk, and construction difficulty. Combined with the engineering construction practice of the multiline parallel pipe-jacking project for the north city drainage and flood control project through Chu River in Hefei, the strength reduction method has been utilized to study the surrounding stratum FOS for the pipe-jacking construction unloading under different overburden thickness Hs, different clear distance D, and different river water depth H w in this paper. The formula of the minimum critical overburden thickness Hsmin and the minimum critical clear distance Dmin of the surrounding stratum self-stability during pipe-jacking construction unloading have been derived. The division method of the affected zone for the multiline parallel river-crossing pipe-jacking construction which behaves as the mutual influence nonself-stability zone, the mutual influence self-stability zone, and the no mutual influence self-stability zone has been proposed. For further discussion, the construction sequence of the multiline parallel river-crossing pipe jacking has been studied.

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Longitudinal mechanical force mechanism and structural design of steel tube slab structures

Cited by 9 publications

References 16 publications

Mechanical performance and failure mechanism of U-steel support structure under blast loading

Mechanical performance and failure mechanism of U-steel support structure under blast loading

Protection Technique of Support System for Dynamic Disaster in Deep Underground Engineering: A Case Study

Study on the Division of the Affected Zone under Construction Unloading and Its Construction Sequence of the Multiline Parallel River-Crossing Pipe Jacking

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