Deformation behavior and acting earth pressure of three-hinge precast arch culvert in construction process

Sawamura, Yasuo; Ishihara, Hiroyuki; Otani, Yoshinori; Kishida, Kiyoshi; Kimura, Makoto

doi:10.1016/j.undsp.2018.09.005

Cited by 10 publications

(3 citation statements)

References 11 publications

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“…In order to solve the problem of construction period, prefabricated structure is preferred in road engineering. In terms of the component prefabrication and on-site construction, short-term projects can be implemented (Marshall et al, 2014; Sawamura et al, 2019). In the future, prefabricated buried reinforced concrete and GFRP arch composite culverts are believed to be further utilized and studied in highway engineering.…”

Section: Resultsmentioning

confidence: 99%

Deformation properties of arched glass fiber reinforced plastics structure under static load: Considering the soil cover and rise-span ratio

Liu

Zhang

Xue

et al. 2022

Advances in Structural Engineering

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In this study, the load level, soil cover height, rise-span ratio, and arch foot constraint state were utilized to explore the mechanical properties of buried arch glass fiber reinforced plastics (GFRP) structures. Through the indoor scale-down test, the stress and deformation of arched GFRP structures under different load and soil cover height were investigated. Additionally, through the three-dimensional finite element method, the influence of the rise-span ratio and the constraint state of arch foot on the mechanical properties were obtained. The results indicate the new buried composite arch structure has excellent bearing capacity for the possible traffic load. Simultaneously, the semi-elliptical arch structure was believed to outperform the semi-circular arch structure when considering the external load. Specifically, increasing the soil cover height and reducing rise-span ratio were found to achieve the load-reduction effect.

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Section: Resultsmentioning

confidence: 99%

Deformation properties of arched glass fiber reinforced plastics structure under static load: Considering the soil cover and rise-span ratio

Liu

Zhang

Xue

et al. 2022

Advances in Structural Engineering

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“…When the friction force between the two blocks is less than the shear force on the contact surface, the broken block slides down and sinks along the contact surface, resulting in rotational deformation and instability. The key stratum fractured for the first time, and the formed key block constituted an asymmetric three-hinge arch structure [26,27].…”

Section: The Calculation Of Key Stratum Failurementioning

confidence: 99%

Numerical Study on Characteristics of Bedrock and Surface Failure in Mining of Shallow-Buried MCS

2022

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Coal is one of the important energy sources for industry. When it is mined, it will cause the destruction of bedrock and surface. However, it is more severe in mining shallow-buried multi coal seams (SBMCS). To better reveal the characteristics of the bedrock and surface damage, we have carried out a theoretical analysis, as well as used numerical simulations and field monitoring methods to study the surface and bedrock damage caused by the mining of SBMCS. The characteristics of bedrock and surface failure structure, settlement, and stress distribution were studied and analyzed. The findings show that the collapsed block, formed by the rupture of the overlying stratum, interacts with the surrounding rock to form large cavities and gaps, and the stress concentration occurs between them. The maximum downward vertical concentration stress is about 9.79 MPa. The mining of the lower coal seam can lead to repeated failure of the upper bedrock and goaf. The settlement of bedrock presents gradient change, and the settlement of upper bedrock is large, about 8.0 m, and the maximum settlement is 8.183 m, while that of lower bedrock is small and about 3.5–4.0 m. The weak rock stratum in the bedrock is crushed by the change stress of repeated mining, and formed a broken rock stratum. The cracks in the bedrock develop directly to the ground. On the ground, tensile cracks, compression uplift, stepped cracks, and even collapse pits are easy to cause in mining SBMCS. Affected by repeated mining, the variation of surface vertical stress is complex and disorderly in the middle of the basin, and the variation of horizontal stress is mainly concentrated on the edge of the basin. The maximum stress reaches 100 KPa, and the minimum stress is about 78 KPa. Through theoretical analysis and discussion, the size of the key blocks is directly related to the thickness and strength of the rock stratum.

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“…Flexible shell structures take advantage of the coaction of a thin shell with the soil backfill; thus, both the fill and shell are the structural elements here, and not, as is the case with rigid structures, merely a backfill (Kang et al 2008, Liu et al 2011Sawamuraa et al 2018). The shells, which have flexible properties, and the soil material (fill) are therefore the load-bearing structure.…”

Section: Introductionmentioning

confidence: 99%

Impact of Live Load on Changes of Backfill Properties of Buried Flexible Steel Railway Structure

Wysokowski

2021

Transp. Infrastruct. Geotech.

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The article attempts to assess the changes in the properties of the soil backfill on the basis of studies carried out on the soil compaction indicator for a buried flexible steel structure located in a section of the Pan-European railway line. Initial tests on soil compaction showed that the backfilling does not meet the standard for railway structures. On this basis, it was decided to conduct additional studies taking into account the probability of compacting the soil during the operation of the structure. In order to verify any changes, the compaction indicator tests were repeated after 7 months of use under intensive railway load. On this basis, it can to be stated that there is relationship between the impact of a service load and the parameters of a soil backfill over time. As a result of the intense exploitation of a structure, an increase in the soil compaction index even up to 6.0% (average 2.5%) occurs.

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Deformation behavior and acting earth pressure of three-hinge precast arch culvert in construction process

Cited by 10 publications

References 11 publications

Deformation properties of arched glass fiber reinforced plastics structure under static load: Considering the soil cover and rise-span ratio

Deformation properties of arched glass fiber reinforced plastics structure under static load: Considering the soil cover and rise-span ratio

Numerical Study on Characteristics of Bedrock and Surface Failure in Mining of Shallow-Buried MCS

Impact of Live Load on Changes of Backfill Properties of Buried Flexible Steel Railway Structure

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