Modeling and assessing the impact of tunnel drainage on terrestrial vegetation

Xu, Hao; Gokdemir, Cagri

doi:10.1016/j.tust.2021.104097

Cited by 6 publications

(3 citation statements)

References 64 publications

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“…At present, this model has been widely used in agricultural research [32][33][34], but few studies have applied it to the effect of tunnel excavation on plants. The previous studies mostly ana-lyzed the effect of a tunnel excavation on local plants from the perspective of soil water matrix potential (SWMP) [35,36], but ignored other fluxes in the SPAC model, and did not further apply them to the study of ecological water level.…”

Section: Introductionmentioning

confidence: 99%

Effect of groundwater decline on plant induced by tunnel excavation and calculation of ecological water level based on SPAC model

Liu,

Zhuang,

Zhou

et al. 2024

Journal of Intelligent Construction

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Keywordsgroundwater decline ecological water level SPAC model plant wiltDuring the excavation of tunnels in mountainous areas, groundwater may be lost, which affects the surface plants and ecology. In this article, taking Hengwu Tunnel in China as an example, based on the soil-plant-atmosphere continuum (SPAC) model, the relevant parameters were obtained by field test first, and then from the perspective of soil water matrix potential (SWMP) and soil water migration (SWM), the effect of groundwater level decline induced by mountain tunnel excavation on plant growth was studied, and the calculation method of ecological water level was put forward. The results show the following: (1) The wilting of plant roots is a dynamic process of gradual expansion from the middle of the root to both ends, and the response of SWMP in the root region to changes in atmosphere and groundwater level is lagging and non-uniform; (2) SWMP can be used to predict the degree of wilting of plant roots, while the final distribution and value of SWMP are only related to the position of the groundwater level, but not related to the decline rate of the groundwater level; (3) groundwater level and rainfall (P) will affect the value and proportion of each flux in the SPAC model, in which the relative transpiration ratio can be used to evaluate the growth of the plant and calculate the ecological water level of the plant.

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Section: Introductionmentioning

confidence: 99%

Effect of groundwater decline on plant induced by tunnel excavation and calculation of ecological water level based on SPAC model

Liu,

Zhuang,

Zhou

et al. 2024

Journal of Intelligent Construction

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show abstract

“…Proposed a structural form suitable for high water level tunnel and the structural form of controlled drainage scheme, and studied the water pressure distribution in the tunnel lining by theoretical analysis, indoor tests and eld measurements [19]. Developed an assessment framework based on a regionally coupled hydrological model to study the effects of tunnel drainage on surrounding vegetation [20][21][22][23]. However, the current research results of tunnel drainage prevention are conventional drainage methods.…”

Section: Introductionmentioning

confidence: 99%

FEM analysis of a new three-way drainage and pressure reduction system for road tunnels

Teng

Liu

Mei

et al. 2023

Preprint

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For the water-rich area tunnel elevation arch in the high-water pressure often causes elevation arch cracking and leakage, bulging and other disasters. When the drainage system is not designed properly, such disasters occur more frequently, and conventional road tunnel drainage cannot effectively reduce the water pressure at the elevation arch. Therefore, this paper proposes a new concept of "three-way drainage". The three-way drainage system is based on the conventional drainage system with a new drainage inlet at the elevation arch. On this basis, a series of numerical simulation studies are conducted to verify the pressure-reducing performance of the three-way drainage system on the lining. After demonstration and analysis, the three-way drainage concept can not only effectively reduce the water pressure at the elevation arch of the tunnel, but also have a significant effect on the overall drainage effect of the tunnel. The factors affecting the performance of the three-way drainage system are discussed by varying the model parameters. It was found that the hydraulic conduction coefficient of the surrounding rock and initial support, the number of reverse diversion holes in the elevation arch, the change in head height and the change in secondary lining parameters all had a significant effect on the water pressure outside the tunnel.

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“…A structural form suitable for high water level tunnels and the structural form of a controlled drainage scheme were proposed, and the water pressure distribution in a tunnel lining was studied by theoretical analysis, indoor tests and field measurements 19 . An assessment framework based on a regionally coupled hydrological model was developed to study the effects of tunnel drainage on surrounding vegetation 20 – 23 . However, the current research results of tunnel drainage prevention involved conventional drainage methods.…”

Section: Introductionmentioning

confidence: 99%

FEM analysis of a new three-way drainage and pressure reduction system for road tunnels

Teng

Liu

Mei

et al. 2023

Sci Rep

View full text Add to dashboard Cite

For water-rich areas, tunnel elevation arches under high water pressure often cause elevation arch cracking and leakage, bulging and other failures. When the drainage system is not designed properly, these failures occur more frequently, and conventional road tunnel drainage cannot effectively reduce the water pressure at the elevation arch. Therefore, this paper proposes a new concept of "three-way drainage". The three-way drainage system is based on a conventional drainage system with a new drainage inlet at the elevation arch. On this basis, a series of numerical simulation studies are conducted to verify the pressure-reducing performance of the three-way drainage system on the lining. After demonstration and analysis, the three-way drainage concept can not only effectively reduce the water pressure at the elevation arch of the tunnel but also have a significant effect on the overall drainage effect of the tunnel. The factors affecting the performance of the three-way drainage system are assessed by varying the model parameters. It is found that the hydraulic conduction coefficient of the surrounding rock and initial support, the number of reverse diversion holes in the elevation arch, the change in head height, and the change in secondary lining parameters all have a significant effect on the water pressure outside the tunnel.

show abstract

Modeling and assessing the impact of tunnel drainage on terrestrial vegetation

Cited by 6 publications

References 64 publications

Effect of groundwater decline on plant induced by tunnel excavation and calculation of ecological water level based on SPAC model

Effect of groundwater decline on plant induced by tunnel excavation and calculation of ecological water level based on SPAC model

FEM analysis of a new three-way drainage and pressure reduction system for road tunnels

FEM analysis of a new three-way drainage and pressure reduction system for road tunnels

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