KSCE Journal of Civil Engineering最新文献_第5页

Experimental Study on Characteristics of Filter Cake Formation in Slurry Shield Tunnelling Based on “Cutter-Soil” Interaction 基于 "刀具-土壤 "相互作用的泥浆护盾掘进中滤饼形成特征的实验研究

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-07 DOI: 10.1007/s12205-024-0189-2

Yang Bai, Yapeng Li, Lei Li

{"title":"Experimental Study on Characteristics of Filter Cake Formation in Slurry Shield Tunnelling Based on “Cutter-Soil” Interaction","authors":"Yang Bai, Yapeng Li, Lei Li","doi":"10.1007/s12205-024-0189-2","DOIUrl":"https://doi.org/10.1007/s12205-024-0189-2","url":null,"abstract":"In recent years, more and more river-crossing and sea-crossing underwater tunnels have become the first choice for the construction of large channels in regions with developed river system. Relying on its superior pressure control mode and high security, Slurry Pressure Balance shield (SPB) is widely used in the construction of underwater tunnels with large cross-sections. The filter cake is an important medium to guarantee the stability of the excavation in SPB tunnelling. However, the mechanism of cutter on soil and filter cake (the interaction of “cutter-soil”) are still unclear. In this study, a self-made test apparatus based on the interaction of “cutter-soil” is presented. The experiment results revealed that “cutter-soil” interaction, compared to cases without the interaction, reduced the impermeability and effective stress conversion rate of filter cake, which is unfavorable to guarantee the stability of the tunnel face. To overcome this problem, two methods were proposed: continuous injection of slurry with different densities and increasing the coarse particles of slurry. It is shown that the methods have improved filter the impermeability of cake formation, which contributes to the stability of the shield excavation face.","PeriodicalId":17897,"journal":{"name":"KSCE Journal of Civil Engineering","volume":"4 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated Geotechnical Information Extraction from Construction Boring Logs Using Keyword Groups 使用关键字组从施工钻孔记录中自动提取岩土工程信息

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-07 DOI: 10.1007/s12205-024-0605-7

Byeong-Soo Yoo, Jin-Tae Han, Eomzi Yang

引用次数: 0

Effect of Origin on Chemical Extractability of Fluorine in Soil and Its Consequence on Human Health Risk 产地对土壤中氟的化学萃取性的影响及其对人类健康风险的影响

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-07 DOI: 10.1007/s12205-024-0454-4

Changwon Chae, Soobean Park, Sang-Gyu Yoon, Jinsung An

{"title":"Effect of Origin on Chemical Extractability of Fluorine in Soil and Its Consequence on Human Health Risk","authors":"Changwon Chae, Soobean Park, Sang-Gyu Yoon, Jinsung An","doi":"10.1007/s12205-024-0454-4","DOIUrl":"https://doi.org/10.1007/s12205-024-0454-4","url":null,"abstract":"Exposure to fluorine (F) in soil increases the risks of dental and skeletal fluorosis and osteoporosis. Therefore, it is important to accurately determine the soil F concentration, and quantitatively evaluate the factors that affect the human health risk of soil F. Differences in soil F concentrations were investigated based on source type (anthropogenically contaminated or naturally enriched) and determination method (perchloric acid extraction-distillation (PAED) or alkali fusion-filtration). A soil sample without contamination history (background F concentration = 208 mg·kg−1) was collected and injected with sodium fluoride (NaF) to prepare anthropogenically F-contaminated soil. Mica gravel (> 2 mm) was ground and mixed with quartz powder to mimic soil components of natural F origin. The F concentration in anthropogenically contaminated soil did not significantly differ between methods (slope = 0.959, p > 0.05). The concentration in the naturally F-enriched soil analyzed using alkali fusion-filtration was approximately twice that of the sample analyzed using PAED (slope = 0.548, p < 0.05). This significant difference was ascribed to the abundance of chemically stable F. Non-carcinogenic hazard quotients for children differed between methods in naturally F-enriched soil, at 1.335 (alkali fusion-filtration) and 0.641 (PAED). These findings offer valuable insights for assessing, managing, and remediating soils contaminated or enriched with F.","PeriodicalId":17897,"journal":{"name":"KSCE Journal of Civil Engineering","volume":"32 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Static Load Testing with Elastic Cushion Layer: A Case Study in Foshan Highway Project 带弹性缓冲层的静载荷测试：佛山高速公路项目案例研究

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-07 DOI: 10.1007/s12205-024-0159-8

Yunlong Yao, Xin Liu, Fenqiang Xu, Zhiwei Shao, Guisen Wang, Baoning Hong

{"title":"Static Load Testing with Elastic Cushion Layer: A Case Study in Foshan Highway Project","authors":"Yunlong Yao, Xin Liu, Fenqiang Xu, Zhiwei Shao, Guisen Wang, Baoning Hong","doi":"10.1007/s12205-024-0159-8","DOIUrl":"https://doi.org/10.1007/s12205-024-0159-8","url":null,"abstract":"To address limitations in conventional static load tests for composite foundations, a method utilizing an elastic cushion layer is proposed to accurately simulate subgrade behavior, focusing on a highway project in Guangdong Province. Initial finite element calculations justify the elastic cushion layer introduction. Functional correlations are established between the stab deformation of the piles and the thickness, modulus and the pile-soil stress ratio. The reasonable value of the elastic modulus is taken as 4–10 MPa when the elastic cushion layer thickness is 60 mm. Lab and field tests of cement fly-ash gravel (CFG) pile composite foundations assess settlement variations and pile-soil stress ratios from the proposed improvements. Results reveal the superior performance of the elastic cushion layer over the sand cushion layer, effectively mimicking embankment subgrade layers and reducing rigid constraints on the loading plate. The elastic cushion layer exhibits a significant stress-regulating effect, allowing the transition from the original “100–150 mm sand cushion layer + loading plate” to “less than 100 mm sand cushion layer + 60 mm elastic cushion layer (8 MPa) + loading plate”. This adjustment enhances the practical role of the subgrade in the composite foundation, improving the accuracy and feasibility of static load testing methods.","PeriodicalId":17897,"journal":{"name":"KSCE Journal of Civil Engineering","volume":"133 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Predicting Hydrological Drought Conditions of Boryeong Dam Inflow Using Climate Variability in South Korea 利用气候变异性预测韩国宝岭大坝下泄流量的水文干旱状况

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-07 DOI: 10.1007/s12205-024-0160-2

Seonhui Noh, Micah Lourdes Felix, Seungchan Oh, Kwansue Jung

{"title":"Predicting Hydrological Drought Conditions of Boryeong Dam Inflow Using Climate Variability in South Korea","authors":"Seonhui Noh, Micah Lourdes Felix, Seungchan Oh, Kwansue Jung","doi":"10.1007/s12205-024-0160-2","DOIUrl":"https://doi.org/10.1007/s12205-024-0160-2","url":null,"abstract":"When a hydrological drought occurs due to a decrease in water storage, there is no choice but to supply limited water. Because this has a devastating impact on the community, it is necessary to identify causes and make predictions for emergency planning. The state of change in dam inflow can be used to confirm hydrological drought conditions using the Standardized Runoff Index (SRI), and meteorological drought and climate variability are used to identify causal relationships. Multiple Linear Regression (MLR) and Generalized Additive Model (GAM) models are developed to predict accumulated hydrological drought for 6, 12, and 24 months in the Boryeong Dam basin, and the Nash-Sutcliffe model efficiency coefficient (NSE) exceeded 0.4, satisfying the suitability criteria. The estimation ability is highest when predicting a 12-month annual drought, and reliability can be further increased by reflecting some climate fluctuations in a non-linear form. The droughts of 6 month and 24 month cumulative scales are significantly influenced by the Western Hemisphere Warm Pool (WHWP) extending from the eastern North Pacific to the North Atlantic and by the Nino 3.4 region in the tropical Pacific. Furthermore, it is anticipated that the drought conditions of the inflow volume to the Boryeong Dam will worsen with increasing sea surface temperatures in both regions.","PeriodicalId":17897,"journal":{"name":"KSCE Journal of Civil Engineering","volume":"89 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Adaptability of CS and BT Hobs to Break Soft and Hard Rock CS 和 BT 滚刀破碎软硬岩石的适应性研究

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-06 DOI: 10.1007/s12205-024-2753-1

Xuhui Zhang, Kang Long, TaoTan, Yashi Liao, Jianfang Li, Jingping Liao

引用次数: 0

Why Do Drivers Decide to Violate Traffic Rules while Driving Through Road Tunnels? An Application of the Theory of Planned Behavior 为什么驾驶员决定在通过公路隧道时违反交通规则？计划行为理论的应用

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-06 DOI: 10.1007/s12205-024-1717-9

Guanfeng Yan, Yanjie Li, Mingnian Wang, Tao Yan

{"title":"Why Do Drivers Decide to Violate Traffic Rules while Driving Through Road Tunnels? An Application of the Theory of Planned Behavior","authors":"Guanfeng Yan, Yanjie Li, Mingnian Wang, Tao Yan","doi":"10.1007/s12205-024-1717-9","DOIUrl":"https://doi.org/10.1007/s12205-024-1717-9","url":null,"abstract":"Few studies focus on exploring the relationship between psychological factors and drivers’ violation intention in the tunnel sections which feature several adverse characteristics like poor lighting and a monotonous driving environment. In this study, hierarchical multiple regression is adopted to test the predictive effect of the demographic parameters, standard theory of planned behavior (TPB) constructs, and three additional constructs of moral norms, past behavior, and perceived stress to account for intentions to violate traffic rules while driving through road tunnels. In this study, three typical violations while driving inside tunnels including changing the lane, overtaking, and speeding are selected. A sample of drivers (N = 384; 50.3% are men and 49.7% women) were surveyed through a self-report questionnaire. Hierarchical multiple regression analyses show that age appears to be the only significant predictor of violation intention among demographic parameters, and theory of planned behavior (TPB) components account for the majority of the variance in violation intention. In addition, moral norms show a negative significant relationship with violation intention while perceived stress is positively associated with violation intention. The findings could provide an important reference for the development of corresponding interventions.","PeriodicalId":17897,"journal":{"name":"KSCE Journal of Civil Engineering","volume":"32 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and Theoretical Study on the Shear Performance of Single-Box Double-Compartment Segmental Box Girder 单箱双室节段箱梁剪切性能的实验和理论研究

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-06 DOI: 10.1007/s12205-024-2082-4

XiangYan Fan, FangWen Wu, LaiJun Liu, Meng Du, LiGuo Zhao, JinCheng Cao, Song Lei

{"title":"Experimental and Theoretical Study on the Shear Performance of Single-Box Double-Compartment Segmental Box Girder","authors":"XiangYan Fan, FangWen Wu, LaiJun Liu, Meng Du, LiGuo Zhao, JinCheng Cao, Song Lei","doi":"10.1007/s12205-024-2082-4","DOIUrl":"https://doi.org/10.1007/s12205-024-2082-4","url":null,"abstract":"In this study, the failure mode and mechanism of single-box two-compartment segmental box girders under flexural shear coupling were experimentally studied. Loading tests were conducted on five scaled girders, and the effects of the design parameters on the shear performance were analyzed. The test variables included the loading methods, ratio of internal to external prestressing tendons, and key joint types (vertical and horizontal keys). The test results indicated that different loading methods produce different stress characteristics and damage modes; however, the difference in the ultimate load capacity was negligible. The greater the number of internal prestressing tendons, the greater the bearing capacity. The stress increment of the internal bottom prestress reinforcement was great than the external prestressing tendons. Monolithic box girders could maintain approximately 1.8 times as much pressure as segmental box girders. With the increase of shear span ratio, the load carrying capacity of the segmental beam decreases. Vertical key teeth had a slightly higher bearing capacity than horizontal key teeth. Vertical keys are recommended for segmental box girders owing to their excellent structural properties and ease of construction. and the structure. AASHTO can better predict the shear capacity of segmental beams, while the Chinese code is applicable to segmental beams with appropriate hoop ratio.","PeriodicalId":17897,"journal":{"name":"KSCE Journal of Civil Engineering","volume":"89 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interpretable Capacity Prediction of RC Bridges Based on Genetic Algorithm-enhanced Support Vector Machine Learning 基于遗传算法增强型支持向量机学习的钢筋混凝土桥梁可解释承载力预测

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-06 DOI: 10.1007/s12205-024-1975-6

Shuming Zhou, Donghuang Yan, Yu He

{"title":"Interpretable Capacity Prediction of RC Bridges Based on Genetic Algorithm-enhanced Support Vector Machine Learning","authors":"Shuming Zhou, Donghuang Yan, Yu He","doi":"10.1007/s12205-024-1975-6","DOIUrl":"https://doi.org/10.1007/s12205-024-1975-6","url":null,"abstract":"Existing reinforced concrete (RC) bridges are subjected to environmental erosion and vehicle loads. It is becoming an urgent problem to evaluate the safety condition of bridge structures combining inspection data with artificial intelligence methods. This paper proposes a data-driven capacity assessment framework for existing RC bridges. The load capacity limit state (LCLS) and serviceability limit state (SLS) prediction model are established based on the proposed information fusion machine learning model. The genetic algorithm (GA) optimized support vector machine (SVM) learner is established to capture the relationship between the feature variables and the LSLS or SLS. Forty-five samples are obtained by static and dynamic simulation of the ANSYS models. Five-dimensional parameters are adopted as the key input parameters of the model, including the maximum dynamic deflection, crack opening ratio, and crack normal damage ratio at midspan, 1/4 span, and 3/4 span. The Shapley additive explanations method is proposed to conduct parameters sensitivity analysis. The results show that the GA-SVM regression algorithm in LCLS and SLS reduction factor prediction is better than the artificial neural network (ANN) model. The crack opening ratio is the most critical parameter that can considerably affect the outcomes of the LCLS and SLS prediction.","PeriodicalId":17897,"journal":{"name":"KSCE Journal of Civil Engineering","volume":"22 1","pages":""},"PeriodicalIF":2.2,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141938946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Method to Analyze the Formation of Plastic Hinges in RC Structures under Fire Conditions 分析火灾条件下钢筋混凝土结构塑性铰链形成的方法

IF 2.2 4区工程技术

KSCE Journal of Civil Engineering Pub Date : 2024-08-06 DOI: 10.1007/s12205-024-0055-2

Weiyi Kong, Chuanguo Fu, Zhen Wang

引用次数: 0