Risk and impacts on the environment of free-phase biogas in quaternary deposits along the Coastal Region of Shanghai (2023)

Xu, Y. S., Wu, H. N., Shen, J. S., & Zhang, N. (2017). Risk and impacts on the environment of free-phase biogas in quaternary deposits along the Coastal Region of Shanghai. Ocean Engineering, 137, 129-137. https://doi.org/10.1016/j.oceaneng.2017.03.051

Xu, Ye Shuang ; Wu, Huai Na ; Shen, Jack S. et al. / Risk and impacts on the environment of free-phase biogas in quaternary deposits along the Coastal Region of Shanghai. In: Ocean Engineering. 2017 ; Vol. 137. pp. 129-137.

@article{bc9e4a7362a840779d06b341395f6fd6,

title = "Risk and impacts on the environment of free-phase biogas in quaternary deposits along the Coastal Region of Shanghai",

abstract = "Shallow organic free-phase biogas is distributed in the Quaternary deposit along the coastal region of Shanghai, particularly in the Yangtze River Estuary and Hangzhou Bay. This biogas exerts a significant effect on the environment because of the existence of gas reservoir pressure. Some offshore engineering works, e.g., drainage pipelines, cross-river bridges, and tunnels, have been constructed in the gassy soils around Shanghai. Once the gas cap layer and reserve layer are disturbed during construction, biogas may be released, which will influence the characteristics of the surrounding soils, endanger the engineering safety, and create a harmful environment for the workforce on such projects. Exploration and construction technologies are adopted to control the effects of this hazardous biogas during underground construction. Pre-exhausting technology is frequently used to release the shallow free-phase gas to the ground through pre-exhausted borehole(s) before starting construction. Three case histories constructed in such gassy soils, e.g. Shanghai Sewerage Project, Hangzhou Metro Line No. 1, and Hangzhou Bay Bridge, are introduced to avoid failure. Since the characteristics of shallow gas in practical engineering operations differs from those encountered at smaller scales, field tests were undertaken before pre-exhausting to predict the gas-exhausting effect in these cases.",

keywords = "Countermeasures, Free-phase biogas, Geohazards, Urbanization, Yangtze River Delta",

author = "Xu, {Ye Shuang} and Wu, {Huai Na} and Shen, {Jack S.} and Ning Zhang",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

doi = "10.1016/j.oceaneng.2017.03.051",

language = "English",

volume = "137",

pages = "129--137",

journal = "Ocean Engineering",

issn = "0029-8018",

publisher = "Elsevier BV",

}

Xu, YS, Wu, HN, Shen, JS & Zhang, N 2017, 'Risk and impacts on the environment of free-phase biogas in quaternary deposits along the Coastal Region of Shanghai', Ocean Engineering, vol. 137, pp. 129-137. https://doi.org/10.1016/j.oceaneng.2017.03.051

Risk and impacts on the environment of free-phase biogas in quaternary deposits along the Coastal Region of Shanghai. / Xu, Ye Shuang; Wu, Huai Na; Shen, Jack S. et al.
In: Ocean Engineering, Vol. 137, 2017, p. 129-137.

Research output: Journal article publication › Review article › Academic research › peer-review

TY - JOUR

T1 - Risk and impacts on the environment of free-phase biogas in quaternary deposits along the Coastal Region of Shanghai

AU - Xu, Ye Shuang

AU - Wu, Huai Na

AU - Shen, Jack S.

AU - Zhang, Ning

N1 - Publisher Copyright:© 2017 Elsevier Ltd

PY - 2017

Y1 - 2017

N2 - Shallow organic free-phase biogas is distributed in the Quaternary deposit along the coastal region of Shanghai, particularly in the Yangtze River Estuary and Hangzhou Bay. This biogas exerts a significant effect on the environment because of the existence of gas reservoir pressure. Some offshore engineering works, e.g., drainage pipelines, cross-river bridges, and tunnels, have been constructed in the gassy soils around Shanghai. Once the gas cap layer and reserve layer are disturbed during construction, biogas may be released, which will influence the characteristics of the surrounding soils, endanger the engineering safety, and create a harmful environment for the workforce on such projects. Exploration and construction technologies are adopted to control the effects of this hazardous biogas during underground construction. Pre-exhausting technology is frequently used to release the shallow free-phase gas to the ground through pre-exhausted borehole(s) before starting construction. Three case histories constructed in such gassy soils, e.g. Shanghai Sewerage Project, Hangzhou Metro Line No. 1, and Hangzhou Bay Bridge, are introduced to avoid failure. Since the characteristics of shallow gas in practical engineering operations differs from those encountered at smaller scales, field tests were undertaken before pre-exhausting to predict the gas-exhausting effect in these cases.

AB - Shallow organic free-phase biogas is distributed in the Quaternary deposit along the coastal region of Shanghai, particularly in the Yangtze River Estuary and Hangzhou Bay. This biogas exerts a significant effect on the environment because of the existence of gas reservoir pressure. Some offshore engineering works, e.g., drainage pipelines, cross-river bridges, and tunnels, have been constructed in the gassy soils around Shanghai. Once the gas cap layer and reserve layer are disturbed during construction, biogas may be released, which will influence the characteristics of the surrounding soils, endanger the engineering safety, and create a harmful environment for the workforce on such projects. Exploration and construction technologies are adopted to control the effects of this hazardous biogas during underground construction. Pre-exhausting technology is frequently used to release the shallow free-phase gas to the ground through pre-exhausted borehole(s) before starting construction. Three case histories constructed in such gassy soils, e.g. Shanghai Sewerage Project, Hangzhou Metro Line No. 1, and Hangzhou Bay Bridge, are introduced to avoid failure. Since the characteristics of shallow gas in practical engineering operations differs from those encountered at smaller scales, field tests were undertaken before pre-exhausting to predict the gas-exhausting effect in these cases.

KW - Countermeasures

KW - Free-phase biogas

KW - Geohazards

KW - Urbanization

KW - Yangtze River Delta

UR - http://www.scopus.com/inward/record.url?scp=85016572251&partnerID=8YFLogxK

U2 - 10.1016/j.oceaneng.2017.03.051

DO - 10.1016/j.oceaneng.2017.03.051

M3 - Review article

AN - SCOPUS:85016572251

SN - 0029-8018

VL - 137

SP - 129

EP - 137

JO - Ocean Engineering

JF - Ocean Engineering

ER -

Xu YS, Wu HN, Shen JS, Zhang N. Risk and impacts on the environment of free-phase biogas in quaternary deposits along the Coastal Region of Shanghai. Ocean Engineering. 2017;137:129-137. doi: 10.1016/j.oceaneng.2017.03.051