Life-Cycle Assessment of Ground Improvement Alternatives for the Treasure Island, California, Redevelopment

Raymond, Alena J.; Pinkse, Mark A.; Kendall, Alissa; DeJong, Jason T.

doi:10.1061/9780784480434.037

Cited by 14 publications

(6 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Current ground improvement techniques used to mitigate these disasters ( e.g. deep dynamic compaction, permeation grouting, and deep soil mixing) necessitate the use of energy-intensive approaches and often considerable Portland cement that results in significant environmental impacts. , Alternative technologies are needed to address these societal needs while minimizing environmental impacts. Bio-mediated ground improvement approaches are increasingly expected to offer novel, sustainable solutions to conventional geotechnical challenges.…”

Section: Introductionmentioning

confidence: 99%

Native Bacterial Community Convergence in Augmented and Stimulated Ureolytic MICP Biocementation

Graddy

Gomez

DeJong

et al. 2021

Environ. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

Microbially induced calcite precipitation is a biomineralization process with numerous civil engineering and ground improvement applications. In replicate soil columns, the efficacy and microbial composition of soil bioaugmented with the ureolytic bacterium Sporosarcina pasteurii were compared to a biostimulation method that enriches native ureolytic soil bacteria in situ under conditions analogous to field implementation. The selective enrichment resulting from sequential stimulation treatments strongly selected for Firmicutes (>97%), with Sporosarcina and Lysinibacillus comprising 60 to 94% of high-throughput 16S rDNA sequences in each suspended community sample. Seven species of the former and two of the latter were present in greater than 10% abundance at different times, demonstrating unexpected within-genus diversity and robustness in the suspended phase of this highly selective environment. Based on longer 16S sequences, it was inferred that augmented S. pasteurii competed poorly with natural bacteria, decreasing to below detection after nine treatments, while the native microbial community was enriched to approximately that present in the stimulated columns. These analyses were corroborated by the observed convergence in bulk ureolytic rates and calcite contents between techniques. However, a 10-fold discrepancy between the observed cell density and an activity-based estimate indicates the attached community, uncharacterized despite efforts, substantially contributes to bulk behavior.

show abstract

Section: Introductionmentioning

confidence: 99%

Native Bacterial Community Convergence in Augmented and Stimulated Ureolytic MICP Biocementation

Graddy

Gomez

DeJong

et al. 2021

Environ. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Liquefaction of loose saturated sands is a serious concern in seismically active regions due to the detrimental consequences observed after earthquake loading (e.g., bearing failures underneath buildings, uplift of buried tanks, and failure of bridges and embankments). Current ground improvement methods to mitigate liquefaction include dynamic compaction, chemical grouting, and deep soil mixing, amongst others; however, these methods are typically energy intensive and have the potential to negatively impact the environment (Karol 2003, Raymond et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Centrifuge Model Testing of Liquefaction Mitigation via Microbially Induced Calcite Precipitation

Darby

Hernandez²,

DeJong

et al. 2019

J. Geotech. Geoenviron. Eng.

Self Cite

View full text Add to dashboard Cite

A set of saturated Ottawa sand models were treated with Microbially Induced Calcite Precipitation (MICP) and subjected to repeated shaking events using the 1-m radius centrifuge at the UC Davis Center for Geotechnical Modeling. Centrifuge models were constructed to initial relative densities (DR0) of approximately 38% and treated to light, moderate, and heavy levels of cementation (calcium carbonate contents by mass of approximately 0.8%, 1.4%, and 2.2%, respectively) as indicated by shear wave velocities (light ≈200 m/s, moderate ≈325 m/s, and heavy ≈600 m/s). The cemented centrifuge models are compared to a pair of uncemented saturated Ottawa sand models with initial DR0s of ≈38 and ≈53% and subjected to similar levels of shaking. Cone penetration resistances and shear wave velocities are monitored throughout shaking to investigate (1) the effect of cementation on cone penetration resistance, shear wave velocity, and cyclic resistance to liquefaction triggering and (2) the effect of shaking on cementation degradation. Accelerometers, pore pressure transducers, and a linear potentiometer are used to monitor the effect of cementation on liquefaction triggering and consequences. Cone penetration resistances and shear wave velocities are sensitive to light, moderate, and heavy levels of cementation (increases in penetration resistance from 2 to 5 MPa, 2 to 10 MPa, and 2 to 18 MPa and shear wave velocity from 140 to 200 m/s, 140 to 325 m/s, and 140 to 660 m/s, respectively), and are able to capture the effects of cementation degradation.

show abstract

“…Eleven studies examined ground improvement techniques (i.e. DSM, vibro replacement, VC, DDC, earthquake drains, and CG) using comparative LCAs (Egan and Slocombe 2010, Pinske 2011, Spaulding et al 2012, Raymond et al 2017, Ashfaq et al 2021, Ghadir et al 2021. Except for Shillaber et al (2017), who conducted a hybrid LCA, the studies used process-based LCA.…”

Section: Ground Improvementmentioning

confidence: 99%

“…Several of these studies did not fulfill the full scope of an LCSA as the social impacts or benefits of ground improvement were not quantitively evaluated. Raymond et al (2017), however, did calculate the social cost of carbon (SCC) associated with alternative ground improvement scenarios. In a later study, Raymond et al (2021) developed a qualitative approach to assess the impacts of construction activities on soil quality based on prioritization and weighting of several considerations (e.g.…”

Section: Ground Improvementmentioning

confidence: 99%

Evaluation of life cycle assessment (LCA) use in geotechnical engineering

de Melo,

Kendall,

DeJong

2024

Environ. Res.: Infrastruct. Sustain.

Self Cite

View full text Add to dashboard Cite

In recent years, there has been a growing emphasis to incorporate sustainability metrics into geotechnical engineering design decisions, driven by the surging eco-consciousness of industry standards. Consequently, life cycle assessment (LCA) has emerged as a popular method for evaluating the environmental impacts of geotechnical systems or projects. This paper conducts a critical review of 54 publications that apply life cycle assessment to various geotechnical systems, including deep foundations, biogeotechnics, dams, ground improvement, earth retaining structures, tunnels, and others. This review assesses the current state of practice for LCA in geotechnical engineering, identifies common barriers to implementation, and provides suggestions for successful execution. While sustainability practices have been more readily adopted by some subdisciplines of civil engineering including structural and transportation, geotechnical engineering faces distinct challenges due to its inherent site-specific nature, characterized by non-homogeneous soils and the necessity for bespoke solutions. Despite the notable increase in geotechnical LCAs , the absence of uniform standards remains a critical issue. Many studies could be improved by enhancing transparency in reporting data and results, clearly justifying input assumptions, and assessing the effects of variable soil conditions. Geotechnical LCA studies often concentrate on highly specialized problems, limiting the relevance of findings to other projects and impeding the development of clear recommendations for industry practitioners. Future research endeavors would benefit from establishment of comprehensive frameworks and multi-indicator models tailored to geotechnical systems to more accurately capture expected environmental impacts and opportunities for their reduction. A standardized approach could reduce redundancy in studies, encourage knowledge transfer, and provide a basis for broader applicability of sustainability practices in the geotechnical engineering profession.

show abstract

Life-Cycle Assessment of Ground Improvement Alternatives for the Treasure Island, California, Redevelopment

Cited by 14 publications

References 1 publication

Native Bacterial Community Convergence in Augmented and Stimulated Ureolytic MICP Biocementation

Native Bacterial Community Convergence in Augmented and Stimulated Ureolytic MICP Biocementation

Centrifuge Model Testing of Liquefaction Mitigation via Microbially Induced Calcite Precipitation

Evaluation of life cycle assessment (LCA) use in geotechnical engineering

Contact Info

Product

Resources

About