When Green Transportation Backfires: High-Speed Rail's Impact on Transport-Sector Carbon Emissions from 315 Chinese Cities

Sustainable Cities and Society, Journal Year: 2024, Volume and Issue: 114, P. 105770 - 105770

Published: Aug. 24, 2024

Language: Английский

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Lighting environment design evaluation with digital workflow: A life cycle framework for integrating carbon and cost reduction strategies in tunnels

Tunnelling and Underground Space Technology, Journal Year: 2025, Volume and Issue: 157, P. 106363 - 106363

Published: Jan. 8, 2025

Language: Английский

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Carbon emission analysis and evaluation of steel-concrete composite structure bridge based on fuzzy comprehensive evaluation comprehensive evaluation method

Science Progress, Journal Year: 2025, Volume and Issue: 108(2)

Published: March 31, 2025

Measuring the low carbon performance of buildings is a crucial method for achieving construction industry's strategic goal “double carbon.” The emission factor calculation approach proposed by IPCC utilized to create model steel-concrete composite structure bridge across its whole life cycle. discount rate used determine dynamic emissions structural bridge, which are then compared static emissions. strength evaluated using fuzzy comprehensive technique. application analysis conducted on basis in Beijing. According findings, primarily concentrated during preparation, production, and operation building materials. bridge's 103.966 1378.674 ktCO 2 e, respectively. After material recovery, values 95.141 e 1107.751 ratio ranges from 7 34, highlighting significance temporal value. recycling components, dropped 2.565 2.353, while fell 2.422 2.210, both were medium strengths. this study can successfully examine bridges environmental economic perspectives, it be select more environmentally friendly materials methods increase efficiency. It also provides valuable data assistance establishment execution protection measures, thereby promoting long-term sustainable development.

Language: Английский

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Study on Carbon Emission Calculation During the Materialization Phase of Subway Stations and Comparative Analysis of Carbon Emissions from Various Construction Methods

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: unknown, P. e03923 - e03923

Published: Oct. 1, 2024

Language: Английский

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Exploring the Mechanism of Sustainable Innovation in the Complex System: A Case Study

Systems, Journal Year: 2025, Volume and Issue: 13(4), P. 232 - 232

Published: March 28, 2025

The construction of complex systems is great significance in enhancing national competitiveness and promoting social development. However, the academic community currently lacks a systematic understanding its sustainable innovation mechanism. This study selected China Manned Space Engineering Application System (CMSEAS) as representative case system. Research data were collected by multi-method approach including document literature, internal data, field research, interviews. Through lens grounded theory, delves into how system achieves local to maintain sustainability innovation. Findings indicate that, firstly, late-mover advantage spiritual strength jointly contribute knowledge accumulation major task-oriented systems, this significantly improves ability systems. Secondly, while emphasizing enhancement capabilities, it imperative for implement holistic risk management, which an important guarantee successfully achieving goal. Thirdly, context market failure, whole nation provides strong support overall institution capacity constitute backbone ensuring

Language: Английский

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Quantification of Carbon Emissions of Building Decoration Processes

Buildings, Journal Year: 2024, Volume and Issue: 14(11), P. 3570 - 3570

Published: Nov. 9, 2024

The continuous growth in building decoration activities has led to significant energy and material consumption, increasing carbon emissions the construction sector. Existing literature frequently overlooks impact of decorations. This study employs life cycle assessment (LCA) method quantify associated with decorations across five typic types: residential, hospital, educational, sports cultural, office buildings. Data were gathered using a mix field investigations, document reviews, semi-structured interviews, ensuring comprehensive coverage all stages. results reveal that emission intensities studied ranged from 70.01 298.79 kg CO2 eq/m2, lowest found educational buildings highest cultural production stage consistently emerges as major contributor emissions, accounting for over 50% types. transportation also represents share, contributing 18.6% 24.5% It indicates ceiling engineering well wall column are primary sources terms activities. systematically compares characteristics multiple types, addressing gap been largely overlooked existing literature. highlights key proposes targeted mitigation strategies. findings suggest future research directions, including application innovative low-carbon materials, advanced technologies, optimization logistics. These insights lay solid foundation design practices within

Language: Английский

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Carbon Neutrality Benefit by Developing Underground Space and Overlying Green Land: Calculation Methodology and Case Study

Buildings, Journal Year: 2024, Volume and Issue: 15(1), P. 78 - 78

Published: Dec. 29, 2024

The advancement of ecological civilization has heightened the urgency for urban emission reductions. Currently, there is a significant gap in quantitative assessment carbon neutrality benefit developing underground space and overlaying green land. To address this, this study presents model based on building lifecycle theory. quantifies emissions typical public buildings utilizing aboveground/underground assesses sink impacts lands. Notably, it introduces innovative parameter characteristic time to evaluate how comprehensive development aboveground land contributes achieving neutrality. Case analysis shopping mall northern China revealed that, comparison buildings, exhibit higher energy consumption construction lighting; however, they demonstrate superior thermal performance, providing warmth winter coolness summer. Furthermore, spaces equivalent area can sequester portion produced by resulting lower overall profile system throughout its compared that system. Consequently, plays crucial role advancing neutral objectives. also emphasizes importance selecting plant communities with enhanced sequestration capacities corresponding better meet This research offers novel perspective evaluating benefits systems, valuable design guidance integrating spaces.

Language: Английский

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Accounting Method and Indicators of Multilevel CO2 Emissions Based on Cost During Construction of Shield Tunnels

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(20), P. 9552 - 9552

Published: Oct. 19, 2024

With the rapid expansion of shield tunnel projects in China, precise accounting CO2 emissions throughout entire process is essential for advancing green and low-carbon construction practices. This paper introduces an innovative methodology utilizing a cost-based carbon emission coding system. It adopts multilevel approach to accounting, aligned with this system, which facilitates detailed examination ratios characteristics across various techniques. The analysis includes six typical varying diameter, focusing on sub-projects scrutinize establish specific indicators. findings indicate that per 10,000 yuan investment, approximately 30.25% (or 3025 kgCO2e/10,000 yuan), are more consistent than those unit length. Moreover, study highlights differing trends among compared whole projects, assessing indicators distribution patterns four sub-projects: excavation, segmental lining, internal structure, reinforcement. From these findings, suggests tailored strategies reduction. research provides theoretical basis future planning management strategies.

Language: Английский

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Influence of scour depth and flow velocity field on large-diameter pier group pile foundations

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: Nov. 28, 2024

Sea-crossing bridges face critical challenges due to scour, which can destabilize foundations. This study investigates the scour characteristics of large-diameter main pier Haiwen Bridge, with a pile diameter 4.3 meters. Seabed changes were monitored over 630 days using field tests and numerical simulations. The analyzed relationship between flow velocity depth, revealing that maximum recorded depth was 3.65 meters at upstream side. A linear regression model, developed from 75 sets data, produced formula estimate local depth. Validation against measurements showed strong correlation, calculated values deviating by less than 10% observed data. findings indicate pits 1.5 times wider deeper those downstream, while shallow triangular zone, extending 1.2 diameter, formed downstream. Recommendations for protection include hydrological considerations, particularly on side areas lacking sediment sources.

Language: Английский

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