Bulletin of Engineering Geology and the Environment最新文献_第2页

Compaction quality control of soil-rock filled subgrades in mountainous areas 山区土石填筑路基压实质量控制

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-21 DOI: 10.1007/s10064-025-04331-x

Zhuoling He, Junyun Zhang, Yufei Zhang, Le Zhang, Tao Yang

{"title":"Compaction quality control of soil-rock filled subgrades in mountainous areas","authors":"Zhuoling He, Junyun Zhang, Yufei Zhang, Le Zhang, Tao Yang","doi":"10.1007/s10064-025-04331-x","DOIUrl":"10.1007/s10064-025-04331-x","url":null,"abstract":"<div><p>Soil-rock mixtures with large particle size variations are often used as fill materials for expressway construction in mountainous areas. Conventional testing methods do not enable fast and nondestructive monitoring of real-time changes in the compaction quality of soil-rock filled subgrades. Selecting an appropriate evaluation method is the key to controlling the compaction quality of a soil-rock filled subgrade. In this study, three-dimensional DEM models of subgrade materials were reconstructed by a spherical harmonic series whose harmonization degree was fixed at 15. The macroscopic and mesoscopic behaviours and characteristics of the subgrade under vibratory rolling were analysed. The results showed that the porosity, contact force and coordination number of the subgrades tended to be stable in the last two passes. The subgrades with 4 filler combinations presented the similar mechanical anisotropy and meso-mechanical states. On-site monitoring of subgrades under vibratory rolling and settlement after construction was performed, and the results were considered. An evaluation method and criterion to control the compaction quality of the SRM subgrade was proposed, i.e., whether the average value of the vibration compaction value from the second to last pass differed by more than 2% from the average value in the last pass.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100338","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

Assessment of rock strength by a new drillability index in percussive-rotary drilling 用一种新的可钻性指标评价冲击旋转钻井中岩石强度

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-21 DOI: 10.1007/s10064-025-04282-3

Ruilang Cao, Shangxin Feng

{"title":"Assessment of rock strength by a new drillability index in percussive-rotary drilling","authors":"Ruilang Cao, Shangxin Feng","doi":"10.1007/s10064-025-04282-3","DOIUrl":"10.1007/s10064-025-04282-3","url":null,"abstract":"<div><p>This paper develops a rock drillability index to determine rock strength by interpreting percussive pressure, penetration rate and rotary speed etc. drilling performance parameters in percussive-rotary drilling. Orthogonal experiments were initially conducted by a drilling processes monitoring setup to establish a database of percussive-rotary drilling performance. This database involved drilling performance parameters for 13 types of rock under 7 levels of percussive force, 7 levels of thrust and 5 levels of rotational speeds for examining the relationship between drilling performance parameters and penetration rate. A new rock drillability index was subsequentially proposed based on the nondimensionalize processing to eliminate the influence of drilling parameters on penetration rate. Experimental results demonstrate a negative linear correlation between penetration rate and feed pressure, but independent of the rotation speed. Moreover, the relationship between percussive pressure and penetration rate characterized by an upward-opening parabolic curve. Additionally, each rock type demonstrates a unique radius of curvature, but generally similar axis of symmetry. The proposed rock drillability index shows a great potential in hard rock strength determination via percussive-rotary drilling, and its accuracy, proactive assessment, and real-time capabilities have been validated in practical tunnel engineering.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100336","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

Damage evolution of rock fracture surfaces and the influence of normal stress and shear displacement on the wear zone 岩石断裂面损伤演化及正应力和剪切位移对磨损区的影响

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-21 DOI: 10.1007/s10064-025-04266-3

Juan Liu, Feng Gao, Wenqi Zheng, Yun Bai, Yan Xing, Yanan Gao, Shanjie Su

{"title":"Damage evolution of rock fracture surfaces and the influence of normal stress and shear displacement on the wear zone","authors":"Juan Liu, Feng Gao, Wenqi Zheng, Yun Bai, Yan Xing, Yanan Gao, Shanjie Su","doi":"10.1007/s10064-025-04266-3","DOIUrl":"10.1007/s10064-025-04266-3","url":null,"abstract":"<div><p>Assessing the extent of damage on the joint surface is challenging, yet essential for understanding the joint’s shear behavior. We investigate the joint damage evolution and develop a damage evolution equation using the contact change law. The joint samples were examined with direct shear tests at different normal stresses and shear displacements. Experimental results demonstrate that joint roughness is significantly affected by normal stress and shear displacements. Considering these two effects, we obtain the damaged region of the joint surface by transforming the original image of the joint into a binary image under loading conditions. The previously published damage value results and the test results were compiled and analyzed to verify the damage evolution equation. It is shown that the damage evolution equation is applicable to predict the value of the damage to the joint surface with acceptable accuracy. Meanwhile, we establish a shear strength model of joint surfaces through the damage evolution equation. Comparison between the shear strength results obtained from the shear strength model and laboratory experiments demonstrates the validity of the model by comparing the analysis of the error coefficients.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10064-025-04266-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of scale effect on shear behaviors of natural rock joints using the overlapping sampling method 用重叠采样法研究天然岩石节理剪切特性的尺度效应

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-20 DOI: 10.1007/s10064-025-04327-7

Qinkuan Hou, Shuhong Wang, Rui Yong, Minna Xu, Wenpan Sun, Furui Dong

{"title":"Investigation of scale effect on shear behaviors of natural rock joints using the overlapping sampling method","authors":"Qinkuan Hou, Shuhong Wang, Rui Yong, Minna Xu, Wenpan Sun, Furui Dong","doi":"10.1007/s10064-025-04327-7","DOIUrl":"10.1007/s10064-025-04327-7","url":null,"abstract":"<div><p>Investigating the scale effect on the shear behavior of rock joints is pivotal for bridging laboratory studies with engineering applications. The scale effect significantly influences the shear response of rock joints, resulting in variability and uncertainty in their mechanical behavior. To overcome the limitation imposed by laboratory sample sizes, numerical simulations were employed to investigate the influence of scale on peak shear strength, shear stiffness, and peak shear displacement. In this study, the effective joint samples were obtained based on the overlapping sampling method, and the numerical direct shear tests were performed using the distinct element method. The results reveal two primary scale effect patterns: an exponential decay and a linear increase. Specifically, both peak shear strength and shear stiffness exhibit an exponential decay trend, stabilizing for joint sizes exceeding 50 cm and 130 cm, respectively, with errors remaining below 0.01. In contrast, peak shear displacement increases linearly, characterized by a slope of 0.04, thereby providing a robust means to predict the critical sliding displacement of unstable rock masses. The validity of these scale effect patterns was further confirmed through a case study in Shaoxing, Zhejiang Province, China. Additionally, a comprehensive discussion is presented on the criteria for selecting sampling locations to ensure representative outcomes. This work thereby enhances the precise assessment and prediction of the shear behavior of rock joints.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091189","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

Cavitation evolution in underdense soils induced by drainage pipe leakage 排水管道渗漏引起的欠密土空化演化

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-20 DOI: 10.1007/s10064-025-04336-6

Yan Chen, Xinyue Li, Liting Cao, Zhongying Li, Jiacheng Li, Xiangfeng Lv

{"title":"Cavitation evolution in underdense soils induced by drainage pipe leakage","authors":"Yan Chen, Xinyue Li, Liting Cao, Zhongying Li, Jiacheng Li, Xiangfeng Lv","doi":"10.1007/s10064-025-04336-6","DOIUrl":"10.1007/s10064-025-04336-6","url":null,"abstract":"<div><p>Progression and critical conditions of cavitation in underdense soil due to drainage leakage remain unelucidated. This study investigates the evolution process and collapse morphology of soil under varying density conditions—dense, loose, and void—through physical model testing and engineering analysis. Additionally, it examines the critical conditions that lead to soil cavitation. The results indicate that water has an erosive effect on soil, with pronounced impacts on less dense soil. The cavity evolution follows four stages: hydraulic erosion, cavity development, cavity formation, and eventual road collapse. In underdense soil, reduced cohesion and increased permeability accelerate cavity formation. The resulting cavities typically exhibit ellipsoidal cross-sections with a trumpet-shaped distribution. Their longitudinal slope angles are asymmetrical, influenced by the kinetic energy of fluid within the drainage pipe. Furthermore, the rate of porosity change in the soil decreases gradually with increasing distance from the cavity. A sudden shift in this rate can serve as an early indicator of imminent soil cavitation. For silty clay, the cavitation threshold is marked by a sudden increase in the porosity change rate to 50–80% under the tested conditions. These findings provide data and theoretical support for monitoring and predicting road collapse caused by drainage pipe leakage.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091188","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

A roughness quantification method of rock discontinuity considering the influence of both inclination and amplitude of asperities 一种考虑凹凸度和凹凸度影响的岩石不连续面粗糙度量化方法

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-20 DOI: 10.1007/s10064-025-04277-0

Xiaobo Zhang, Zhisong Cao, Yongli Ma, Chi Yao, Jianhua Yang, Zhiwei Ye, Chuangbing Zhou

{"title":"A roughness quantification method of rock discontinuity considering the influence of both inclination and amplitude of asperities","authors":"Xiaobo Zhang, Zhisong Cao, Yongli Ma, Chi Yao, Jianhua Yang, Zhiwei Ye, Chuangbing Zhou","doi":"10.1007/s10064-025-04277-0","DOIUrl":"10.1007/s10064-025-04277-0","url":null,"abstract":"<div><p>The existing quantitative evaluation methods of joint roughness are rich in achievements, among them most methods mainly focus on the influence of either the inclination or the height of joint asperity, and seldom consider both the two factors in the overall roughness quantification of rock joints. In this study, a batch of granite and sandstone joints were prepared for three-dimensional morphology analysis and were subjected to direct shear tests. The Structure-from-Motion (SfM) photogrammetry technique was adopted to digitally reconstruct the three-dimensional joint morphology, which provided data basis for roughness quantification. The non-stationary joint morphology was identified and was removed from the original morphology. Based on the stationary morphology feature, the influence of asperity amplitude on roughness estimation was investigated and a significant effect was revealed. A new statistical roughness parameter, the amplitude-weighted average asperity inclination <i>θ</i><sub>aw</sub>, was proposed that consider extra the contribution of the asperity height feature. In order to quantitatively estimate the JRC for a certain rock joint, a prediction model was suggested to assess the JRC of two-dimensional (2D) joint profile using the new roughness parameter <i>θ</i><sub>aw</sub>. The model was validated to be effective in predicting JRC of joint profiles from published studies. Subsequently, another model was established to predict the JRC of three-dimensional (3D) joint surface by incorporating a three-dimensional influence factor <i>f</i><sub>3D</sub> into the 2D model. This 3D model was verified to have high prediction accuracy in quantifying the roughness of rough joints, through both test results and published data.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144091147","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

Correlations of Cerchar abrasivity index with geomechanical properties of intact rocks and its application to cutter life evaluation 炭磨损指数与完整岩石地质力学性质的相关性及其在刀具寿命评价中的应用

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-20 DOI: 10.1007/s10064-025-04357-1

Zilong Zhou, Jinpeng Dong, Liuqi Zeng, Di Xu, Shaofeng Wang

{"title":"Correlations of Cerchar abrasivity index with geomechanical properties of intact rocks and its application to cutter life evaluation","authors":"Zilong Zhou, Jinpeng Dong, Liuqi Zeng, Di Xu, Shaofeng Wang","doi":"10.1007/s10064-025-04357-1","DOIUrl":"10.1007/s10064-025-04357-1","url":null,"abstract":"<div><p>Rock abrasivity is a critical factor to consider when assessing cutter wear and its service life during rock excavation. To determine rock abrasivity, the Cerchar Abrasivity Test is commonly used to derive the Cerchar Abrasivity Index (CAI) due to its effectiveness and convenience. In this study, 18 different types of intact rocks were selected for testing their geomechanical properties, including density, P-wave velocity (UPV), hardness (<i>H</i>), uniaxial compression strength (UCS), Brazilian tensile strength (BTS), elastic modulus (<i>E</i>), brittleness index (<i>B</i>) and equivalent quartz content (EQC). Subsequently, the correlations between CAI and these geomechanical parameters were analyzed. Simple and multiple regression analysis were conducted to obtain estimation models for calculating the basic mechanical parameters of rocks. The results of the simple regression show a strong positive correlation between CAI and UCS, BTS, <i>E</i>, <i>H</i>, <i>B</i>, and EQC. The correlation coefficients of CAI with each parameter are all higher than 0.8. By contrast, the multiple regression equations with higher coefficients of determination are more precise and reliable than simple regression equations. Finally, it was concluded that the Cerchar Abrasivity Index can effectively estimate cutter life and provide guidance for projects.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100407","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 the evolution law of fracture of sandstone under cyclic water intrusion based on particle-cement coupling damage 基于颗粒-水泥耦合损伤的循环水侵砂岩裂缝演化规律研究

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-19 DOI: 10.1007/s10064-025-04305-z

Zhe Qin, Zhiwen Li, Jiahao Sun, Jihuan Han, Yushui Yan

{"title":"Study on the evolution law of fracture of sandstone under cyclic water intrusion based on particle-cement coupling damage","authors":"Zhe Qin, Zhiwen Li, Jiahao Sun, Jihuan Han, Yushui Yan","doi":"10.1007/s10064-025-04305-z","DOIUrl":"10.1007/s10064-025-04305-z","url":null,"abstract":"<div><p>To investigate the process of rock fracture under load and the accumulation of micro-damage in rocks under cyclic water intrusion, a particle-cement coupling damage model based on discrete element method was proposed. This model establishes a functional relationship between mineral dissolution caused by cyclic water intrusion and the number of particles <i>N</i> and cementation radius <span>(R)</span> in PFC<sup>3D</sup> parameters, aiming to simulate sandstone after cyclic water intrusion. Furthermore, it analyzes the contact force chain, microcracks, cementation evolution, and failure patterns during the loading process of rocks under cyclic water intrusion. The research results show that: (1) Under cyclic water intrusion, the mineral particles and cemented minerals in sandstone continue to dissolve. After 20 cycles of cyclic water intrusion, the loss of particle skeleton is 4.3%, and the loss of cemented minerals is 63.6%, which leads to a significant deterioration of the mechanical properties of rock. (2) The force chain characteristics and distribution at the peak stress and yield failure stages are greatly influenced by the degradation effect of cyclic water intrusion. (3) The number of cyclic water intrusions is positively correlated with the cementation failure rate and the number of microcracks, but negatively correlated with the crack initiation stress. Cyclic water intrusion changes the distribution of micro-shear cracks, reduces the integrity of the specimen during fragmentation, and the distribution of micro-shear cracks dominates the distribution of through-cracks. (4) Compared with the loss of mineral particles, the dissolution of cementation minerals is a more critical factor affecting the degradation of sandstone's mechanical properties.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084927","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 dynamic failure behavior and acoustic emission frequency characteristics of sandstone under drop hammer impact 落锤冲击下砂岩动力破坏行为及声发射频率特征研究

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-19 DOI: 10.1007/s10064-025-04309-9

He Tian, Zhonghui Li, Aikeremujiang Aihemaiti, Shan Yin, Fengtao Gao

{"title":"Investigation of dynamic failure behavior and acoustic emission frequency characteristics of sandstone under drop hammer impact","authors":"He Tian, Zhonghui Li, Aikeremujiang Aihemaiti, Shan Yin, Fengtao Gao","doi":"10.1007/s10064-025-04309-9","DOIUrl":"10.1007/s10064-025-04309-9","url":null,"abstract":"<div><p>To investigate the dynamic failure behavior and acoustic emission (AE) response patterns of sandstone under impact loading, a drop hammer impact (DHI) AE experimental system was established. The study examined the mechanical properties, energy changes, failure characteristics, and AE waveform signal responses of sandstone at different impact speeds during the failure process. The results indicate that the load-time curve of sandstone failure under DHI can be divided into four stages: compaction stage, linear elastic stage, plastic deformation stage, and post-peak development stage. Under low-speed impacts, the load-time curve exhibits a “step” characteristic. As the impact speed increases, the failure mode of sandstone transitions from rebound failure to puncture failure, and the impact energy absorption also shows an upward trend. The main frequency values of the AEs during sandstone failure are all located in the low-frequency range (0–30 kHz), which is an important characteristic frequency range for sandstone failure under DHI. These research findings contribute to a better understanding of sandstone failure behavior and AE response patterns under DHI, playing an important role in ensuring safe production in coal mines.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084931","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 real-time engineering temperature on mechanical behavior and failure mechanism of granite in a tunnel in Southwestern China 实时工程温度对西南某隧道花岗岩力学行为及破坏机制的影响

IF 3.7 2区工程技术

Bulletin of Engineering Geology and the Environment Pub Date : 2025-05-19 DOI: 10.1007/s10064-025-04354-4

Yan Zhang, Meiben Gao, Zhongyuan Xu, Chunchi Ma, Yaohui Gao

{"title":"Influence of real-time engineering temperature on mechanical behavior and failure mechanism of granite in a tunnel in Southwestern China","authors":"Yan Zhang, Meiben Gao, Zhongyuan Xu, Chunchi Ma, Yaohui Gao","doi":"10.1007/s10064-025-04354-4","DOIUrl":"10.1007/s10064-025-04354-4","url":null,"abstract":"<div><p>At present, there is relatively little attention paid to the rock mechanics properties within the engineering temperature range and under small temperature gradients. Combining uniaxial compression tests with particle flow code (PFC) simulations, this study investigates the temperature strengthening mechanism of granite within 20–80 °C. The research reveals a fundamental transition in failure patterns: macroscopic failure modes shift from shear-dominated to tensile-dominated mechanisms as temperature increases, accompanied by microstructural evolution showing smoother fracture surfaces and enhanced intergranular fracture characteristics. Notably, thermal expansion-induced negative strain promotes advantageous strain energy accumulation, which optimizes particle contact relationships and improves frictional properties within the granite matrix. These microstructural enhancements manifest as improved macroscopic mechanical performance, including increased elastic modulus and peak strength, demonstrating a distinctive negative thermal damage phenomenon where moderate heating strengthens rock integrity. A thermal–mechanical-damage statistical constitutive model is developed, with parameter evolution analysis providing mechanistic insights. The findings advance understanding of thermal effects in rock mechanics and offer practical implications for engineering rock mass stability assessment under thermal–mechanical coupling conditions.</p></div>","PeriodicalId":500,"journal":{"name":"Bulletin of Engineering Geology and the Environment","volume":"84 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084928","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