Bulletin of Engineering Geology and the Environment最新文献_第9页

Extending the applicability of the Geological Strength Index (GSI) to karstified rock mass based on the numerical tests of the discrete element method 基于离散元素法的数值测试，将地质强度指数（GSI）的适用范围扩展至岩溶岩体

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-03-03 DOI: 10.1007/s10064-025-04191-5

Lina Yu, Wenbing Shi, Xiqiong Xiang, Hua Li, Xiaoming Wang

{"title":"Extending the applicability of the Geological Strength Index (GSI) to karstified rock mass based on the numerical tests of the discrete element method","authors":"Lina Yu, Wenbing Shi, Xiqiong Xiang, Hua Li, Xiaoming Wang","doi":"10.1007/s10064-025-04191-5","DOIUrl":"10.1007/s10064-025-04191-5","url":null,"abstract":"<div><p>The theoretical scheme of the Hoek–Brown criterion and Geological Strength Index (GSI) has been critical during analyzing engineering problems in karst geological environments. However, it is very difficult to explore the mechanical features of karstified rock mass. In this paper, a new corresponding way was put forward based on the Discrete Element Method (PFC<sup>2D</sup>). Firs,a dissolution algorithm inspired by Cellular Automata was proposed to simulate discontinuity of karstified rock mass; then, according to the Hoek–Brown criterion, the relations between the <i>GSI</i> value of the karstified rock mass and <i>GSI</i> value of the jointed rock mass were deduced based on the results of a series of compression tests; finally, the karstified characteristics were incorporated into the GSI scheme. The following conclusions can be drawn: 1) in addition to the karstified rate (<i>k</i>), the karstified uniformity-coefficient (<i>u</i>) proposed in this paper is also an important influencing factor of <i>GSI</i> value, and the influencing degree of <i>k</i> is greater than <i>u</i> by about 3 times; 2) tensile-microcrack expansions reflect the low strength of the karstified rock mass due to the stress concentration at the rock-bridge between the karst cavity-gaps; 3) the <i>GSI</i> value of the karstified rock mass is expressed as a reduction to the <i>GSI</i> value of the jointed rock mass, so the karst features play the role of a karst correction-coefficient <i>λ</i> (0 < <i>λ</i> < 1) to update the <i>GSI</i> from the discontinuity features, and <i>λ</i> decreases linearly with <i>k</i>, and the decreasing degree is also negatively linearly correlated with <i>u</i>.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 4","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Stability of Lignosulphonate-modified expansive soil under wet-dry cycles: utilizing industrial waste for sustainable soil improvement 木质素磺酸盐改性膨胀土干湿循环稳定性研究——利用工业废弃物进行土壤可持续改良

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-03-03 DOI: 10.1007/s10064-025-04158-6

Miao Piao, Qiao Wang, Fusheng Zha, Lingchao Meng, Hongqiu Zhang

{"title":"Stability of Lignosulphonate-modified expansive soil under wet-dry cycles: utilizing industrial waste for sustainable soil improvement","authors":"Miao Piao, Qiao Wang, Fusheng Zha, Lingchao Meng, Hongqiu Zhang","doi":"10.1007/s10064-025-04158-6","DOIUrl":"10.1007/s10064-025-04158-6","url":null,"abstract":"<div><p>Expansive soils, characterized by significant volume changes in response to moisture fluctuations, present substantial engineering challenges globally. This study explores the efficacy of lignosulfonate (LS), an industrial by-product, as a sustainable stabilizer for expansive soils. Three soil samples with varying degrees of expansiveness (weak, mid, and strong) were treated with LS, and their geotechnical properties were evaluated. For weak, mid, and strong expansive soil, the optimum lignosulphonate content (OLS) determined based on the free swelling rate and plasticity index was 0.75%, 2%, and 6%, respectively. The addition of LS resulted in a reduction of the liquid limit, plasticity index, and free swell index across all soil types. Furthermore, LS-treated soils exhibited enhanced resistance to volume changes and improved shear strength under cyclic wet-dry conditions. Moreover, crack development is inhibited in LS-modified soil. LS decreases the soil’s affinity for water by creating a hydrophobic barrier around soil particles. Furthermore, the interaction between LS and the layered clay minerals results in stronger binding, which contributes to the stabilization process. The findings indicate that LS not only reduces the swelling nature of expansive soils and improves their shear strength and stability under wet and dry cycling conditions, but also provides an environmentally friendly solution for soil stabilization and sustainable construction practices.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 4","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143530023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Degradation of the mechanical properties of root–soil composites under moisture influence 水分影响下根-土复合材料力学性能的退化

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-03-01 DOI: 10.1007/s10064-025-04177-3

Yunzhao Lin, Wenbin Jian, Yilong Wu, Zuteng Zhu, Hao Wang, Hongqiang Dou, Xiufeng Fan

{"title":"Degradation of the mechanical properties of root–soil composites under moisture influence","authors":"Yunzhao Lin, Wenbin Jian, Yilong Wu, Zuteng Zhu, Hao Wang, Hongqiang Dou, Xiufeng Fan","doi":"10.1007/s10064-025-04177-3","DOIUrl":"10.1007/s10064-025-04177-3","url":null,"abstract":"<div><p>Although the root can enhance the soil's strength, vegetation cover landslide still occurs frequently under the rainfall. To elucidate the mechanism underlying the degradation of the shear strength of root‒soil composites under the influence of moisture, we investigated trees from hilly slopes in southeastern China. The tensile mechanical properties of roots were tested under varying moisture conditions.The results of previous work on the friction characteristics of the root-soil interface under different soil water content were also considered. Furthermore, large-scale direct shear tests were performed to assess the strength characteristics of root-soil composites under different root cross-sectional area ratios (RAR) and moisture contents. Based on the widely used Wu model, and incorporating the failure modes of roots in root‒soil composites and the mechanism of root‒soil interface friction, a root‒soil composite strength degradation model was established considering the effects of moisture. Moisture significantly affected the tensile strength of fine tree roots, with the tensile strength of fine roots being lower in the saturated state than in the fresh state. In contrast, coarse roots were almost unaffected by moisture. As the moisture content increased, the additional strength provided by the roots decreased, and the root efficiency (<i>RE</i><sub><i>p</i></sub>) decreased significantly. The model was validated against experimental data, and the calculated results were accurate. In root‒soil composites, as moisture infiltrates, the tensile strength of the roots, soil shear strength, and root‒soil interface shear strength decrease to different degrees. This results in reduced resistance to deformation in the root‒soil composites, leading to a decrease in its strength.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Evaluating the uncertainty in landslide susceptibility prediction: effect of spatial data variability and evaluation unit choices 滑坡易感性预测的不确定性评价：空间数据变异性和评价单元选择的影响

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-28 DOI: 10.1007/s10064-025-04180-8

Shengwu Qin, Jiasheng Cao, Jingyu Yao, Chaobiao Zhang, Renchao Zhang, Yangyang Zhao

{"title":"Evaluating the uncertainty in landslide susceptibility prediction: effect of spatial data variability and evaluation unit choices","authors":"Shengwu Qin, Jiasheng Cao, Jingyu Yao, Chaobiao Zhang, Renchao Zhang, Yangyang Zhao","doi":"10.1007/s10064-025-04180-8","DOIUrl":"10.1007/s10064-025-04180-8","url":null,"abstract":"<div><p>Traditional landslide susceptibility mapping (LSM) typically employs a point sampling approach, which may neglect the variability of spatial data and the selection of evaluation units, thereby introducing uncertainty into landslide susceptibility predictions. Specifically, when compared to the actual boundary shapes of landslides, simple spatial locations are inadequate for capturing the full spectrum of complex information present in the geological environment, and the correlation between grid units and real-world terrain conditions is not sufficiently close. Addressing these issues, this study focuses on Yongji County as a case study and the spatial coordinates and morphological boundaries of landslides served as input variables for the spatial data, with CatBoost (CB) and Random Forest (RF) algorithms employed for training the predictive models. Subsequently, grid units, slope units and topographic units were selected as mapping units. Ultimately, this study employs analytical techniques such as the Receiver Operating Characteristic (ROC) curve and the analysis of Landslide Susceptibility Indexes (LSI) distributions to assess detailed quantification of uncertainty and precision that results from the selection of spatial datasets and evaluation units. The results indicate that utilizing landslide boundary shapes with higher reliability and precision as input variables significantly enhances the overall accuracy of LSM predictions compared to those based on spatial positions, concurrently diminishing the uncertainty associated with the predictive outcomes; across diverse scenarios, the model that combines slope units with landslide boundary shapes achieves the highest precision.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Influence of bedding angle on rockburst behavior of sandstone: insights from energy storage and dissipation 层理角对砂岩岩爆行为的影响：来自能量储存和耗散的启示

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-28 DOI: 10.1007/s10064-025-04192-4

Guanshuang Tan, Chunde Ma, Chaoyang Que, Wenyuan Yang, Guiyin Zhang

{"title":"Influence of bedding angle on rockburst behavior of sandstone: insights from energy storage and dissipation","authors":"Guanshuang Tan, Chunde Ma, Chaoyang Que, Wenyuan Yang, Guiyin Zhang","doi":"10.1007/s10064-025-04192-4","DOIUrl":"10.1007/s10064-025-04192-4","url":null,"abstract":"<div><p>Understanding the rockburst behavior of layered rocks is of great significance for ensuring the safety of underground engineering and optimizing design and construction. To explore the influence of bedding angle on the rockburst behavior, uniaxial compression tests with single unloading were conducted on layered sandstone, separating elastic energy and dissipated energy by unloading and obtaining energy distribution characteristics at different loading stages. The laboratory results indicate that the distribution relationship between elastic and dissipated energy follows the linear energy storage and dissipation (LESD) law. As the bedding angle increases from 0 to 90°, the elastic energy conversion coefficient varies from 0.7296 to 0.7722, and peak elastic energy decreases from 295.74 mJ/cm<sup>3</sup> to 201.24 mJ/cm<sup>3</sup>, indicating that the bedding angle has little effect on the elastic energy conversion capacity but has a significant weakening effect on the peak energy storage capacity (mainly concentrated between 22.5° and 67.5°). Based on the LESD law, three energy-related indexes were calculated to evaluate rockburst proneness. Compared with the rockburst proneness index related to elastic energy conversion ability, the index related to peak energy storage capacity can better distinguish the influence of bedding angle on rockburst proneness, the rockburst proneness is greater between 0° and 22.5°. This study can help to better understand the influence of bedding angle on rockburst behavior from an energy perspective.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 study and finite element simulations for LN2 fracturing in coal from Karaganda Basin 卡拉干达盆地煤中LN2压裂试验研究及有限元模拟

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-28 DOI: 10.1007/s10064-025-04114-4

Sotirios Nik. Longinos, Alisher Konysbekov, Piotr Skrzypacz

{"title":"Experimental study and finite element simulations for LN2 fracturing in coal from Karaganda Basin","authors":"Sotirios Nik. Longinos, Alisher Konysbekov, Piotr Skrzypacz","doi":"10.1007/s10064-025-04114-4","DOIUrl":"10.1007/s10064-025-04114-4","url":null,"abstract":"<div><p>This study looked at the effectiveness of liquid nitrogen (LN<sub>2</sub>) in two distinct coal fracturing processes, freezing time (FT) and freezing–thawing cycle (FTC), for specimens that were saturated with water. The effectiveness of cryogenic treatment for coal rocks was compared using uniaxial compressive strength (UCS) and Brazilian tests. The results indicated in both USC and Brazilian tests, FTC experiments showed better results compared to FT experiments, leading to the conclusion that it may be possible to attain a higher desired permeability improvement by using more LN<sub>2</sub> injections in real-world LN<sub>2</sub> fracturing applications. In brittleness analysis, FT experiments showed higher values than FTC in the B21, B22, B24, and B25 indexes, while FTC experiments showed higher values in the B19 and B20 indexes. A scanning electron microscope (SEM) was used for fracture evolution analysis. Further, numerical simulations detailed the stress distribution patterns within coal samples under cryogenic treatment, utilizing von Mises stress analysis to compare the progression over time. The simulation results, particularly at peak stress periods, strongly correlate with experimental data, validating the model's effectiveness. These findings offer substantial evidence for the feasibility of LN<sub>2</sub>-based treatments in enhancing coal bed permeability, with implications for improving the efficiency and safety of coal extraction processes.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Liquefaction resistance of MICP treated silica and calcareous sand with carbon fiber 碳纤维处理二氧化硅和钙质砂的耐液化性能

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-28 DOI: 10.1007/s10064-025-04181-7

Yi Shan, Jiawen Li, Huizhi Zhou, Yadong Li, Jie Yuan, Jie Cui

{"title":"Liquefaction resistance of MICP treated silica and calcareous sand with carbon fiber","authors":"Yi Shan, Jiawen Li, Huizhi Zhou, Yadong Li, Jie Yuan, Jie Cui","doi":"10.1007/s10064-025-04181-7","DOIUrl":"10.1007/s10064-025-04181-7","url":null,"abstract":"<div><p>Microbial-induced calcite precipitation (MICP) is an environmentally friendly treatment method for soil improvement. When combined with carbon fiber (CF), MICP can enhance the liquefaction resistance of sand. In this study, the effects of CF content (relative to the sand weight of 0%, 0.2%, 0.3%, and 0.4%) on the liquefaction resistance of MICP-treated silica and calcareous sand were investigated. The analysis was conducted using bacterial retention test, cyclic triaxial (CTX) test, LCD optical microscope, and scanning electron microscopy (SEM). The results showed that with the increase in CF content, the bacterial retention rate increased. Additionally, the cumulative cycles of axial strain to 5%, excess pore water pressure to initial liquefaction, as well as strength and stiffness, all increased with higher CF content. This trend continued up to the CF content of 0.2% for silica sand and 0.3% for calcareous sand, beyond which the cumulative cycles began to decrease. The great mechanical system of CF, calcite, and sand particles was significantly strengthened after MICP-treated. However, the reinforced calcite did not completely cover the CF, and excess CF hindered the connection between sand grains. The optimal amount of CF in silica and calcareous sands were 0.2% and 0.3%. This study provides valuable guidance for selecting the optimal CF content in the future MICP soil engineering.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Study on movement characteristics of landslide considering earthquake magnitude and duration time 考虑地震震级和持续时间的滑坡运动特征研究

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-27 DOI: 10.1007/s10064-025-04182-6

Pengxu Jing, Haitao Yang, Qingyi Yang, Nannan Zhang, Minghong Sun, Xiangyu Zhang

{"title":"Study on movement characteristics of landslide considering earthquake magnitude and duration time","authors":"Pengxu Jing, Haitao Yang, Qingyi Yang, Nannan Zhang, Minghong Sun, Xiangyu Zhang","doi":"10.1007/s10064-025-04182-6","DOIUrl":"10.1007/s10064-025-04182-6","url":null,"abstract":"<div><p>China, a mountainous country with developed seismic fault zones, frequently experiences landslides triggered by earthquakes, so it is crucial adjective to explore the movement characteristics of landslides caused by earthquake. Utilizing the Daguangbao landslide as a case study, this paper analyzes movement characteristics of landslide under earthquake magnitude and duration time by means of numerical simulation and control variable methods. Firstly, the original topographic conditions and earthquake magnitude of Daguangbao landslide are restored, and its displacement movement characteristics is studied. Secondly, the landslide movement characteristics under different earthquake magnitudes (VI, VIII, VIII, IX) and duration time (10 s, 20 s, 30 s, 40 s, 50 s, 60 s) are obtained through 27 displacement monitoring points on three sections. Finally, the displacement–time formulas of Daguangbao landslide with different earthquake magnitudes are obtained by linear and nonlinear fitting. The research results show that: (i) The formation process of Daguangbao landslide can be summarized into the following four stages: Stage of earthquake wave shatters slope body; Stage of the formation of main sliding surface; Stage of the sliding of main sliding body; Stage of the sliding accumulation. (ii) In the case of earthquake magnitudes VI, VII and VIII, the landslide displacement increases linearly with the earthquake duration time. (iii) In the case of earthquake IX, the landslide displacement increases first and then decreases with the increase of earthquake duration time. The research reveals the mechanical mechanism of landslide under earthquake action, which provides reference and guidance for the study of the motion characteristics of earthquake landslides, and provides a basis for landslide control and disaster prevention and reduction.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Investigation of water retention and volumetric deformation characteristics of soils subjected to wetting–drying cycles 干湿循环作用下土体保水性和体积变形特性研究

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-27 DOI: 10.1007/s10064-025-04189-z

Shujian Wang, Yiyi Liu, Chuanshan Wu, Yixin Li, Ronghua Zhang, Senlin An, Hongguang Jiang, Zhanyong Yao

{"title":"Investigation of water retention and volumetric deformation characteristics of soils subjected to wetting–drying cycles","authors":"Shujian Wang, Yiyi Liu, Chuanshan Wu, Yixin Li, Ronghua Zhang, Senlin An, Hongguang Jiang, Zhanyong Yao","doi":"10.1007/s10064-025-04189-z","DOIUrl":"10.1007/s10064-025-04189-z","url":null,"abstract":"<div><p>The variation in soil moisture can lead to unfavourable deformation of highway embankments, threatening their long-term stability under seasonal groundwater level fluctuations and frequent changes in evaporation and precipitation. This paper conducted unsaturated soil triaxial tests to examine soil water retention and volumetric deformation behavior during wetting–drying cycles. The results show that soil water retention decreases with increasing wetting–drying cycles, particularly in the low suction range from 0 to 100 kPa, where gravimetric moisture content (GMC) declines sharply. With more wetting–drying cycles, the soil’s capacity for volumetric deformation diminishes. The soil has a loose soil structure and is more prone to plastic deformation. Furthermore, three soil water retention models, the Gallipoli, Tarantino, and Hu models were employed to analyse soil’s hydromechanical behaviours and evaluate the effect of wetting–drying cycles. It was found that Tarantino’s model used only three fitting parameters, which were more concise and maintained a good fitting effect. This study clarifies soil–water retention and volumetric deformation behavior during wetting–drying cycles, which is essential for effective water control in subgrade construction and operation.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143496894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

High-temperature treated oil-rich bedded rock layer and deterioration mechanism of heat transfer performance 经高温处理的富油层状岩层及其传热性能劣化机理

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-02-26 DOI: 10.1007/s10064-025-04154-w

Yanjun Shen, Ziyi Li, Cheng Peng, Jianshuai Hao

{"title":"High-temperature treated oil-rich bedded rock layer and deterioration mechanism of heat transfer performance","authors":"Yanjun Shen, Ziyi Li, Cheng Peng, Jianshuai Hao","doi":"10.1007/s10064-025-04154-w","DOIUrl":"10.1007/s10064-025-04154-w","url":null,"abstract":"<div><p>The study of the changes in heat transfer properties of oil-rich bedded rock layer at high temperatures is important for the development of projects such as underground coal gasification, geothermal mining and nuclear plant construction. In this paper, the change characteristics of heat transfer performance of oil-rich bedded rock layer after high-temperature treatment were studied from macro-meso-microscopic perspective by systematic testing means such as thermal parameter test, NMR, XRD and SEM, and the influence law of temperature and heating time on heat transfer performance was grasped, and the deterioration mechanism of heat transfer performance was revealed. The results show that the heat transfer performance of baseboard rock layer undergoes significant deterioration after high-temperature treatment, with the greatest deterioration rate in the temperature interval of 400 ℃-600 ℃ and 500 ℃ as the temperature threshold for rapid deterioration. The content of the main mineral components such as quartz and kaolinite, which affect the density of the geotechnical structure within the specimens, changed significantly, with the percentage of quartz in the mudstone specimens decreasing from 93 to 83% and kaolinite from 5 to 2%. The percentage of quartz in the siltstone decreased from 91 to 82%, and kaolinite decreased from 6 to 1%. This led to a rapid deterioration of the heat transfer properties of baseboard rock layer, with a reduction in thermal conductivity of 47.2% for mudstone and 58.9% for siltstone.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 3","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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