Cold Regions Science and Technology最新文献

{"title":"Vibration effects on the uniaxial compressive strength of compacted Antarctic snow","authors":"Enzhao Xiao ,&nbsp;Tong Han ,&nbsp;Qiming Zhang ,&nbsp;Zhenxuan Yin ,&nbsp;Hao Wang ,&nbsp;Biao Hu ,&nbsp;Xueyuan Tang ,&nbsp;Bo Sun ,&nbsp;Fan Zhang ,&nbsp;Yihe Wang","doi":"10.1016/j.coldregions.2025.104779","DOIUrl":"10.1016/j.coldregions.2025.104779","url":null,"abstract":"<div><div>Snow road and runway construction plays a vital role in developing logistical networks for Antarctic scientific expeditions. Previous studies based on unconfined compressive tests have demonstrated that the compressive strength of snow increases exponentially with density, establishing density as the dominant controlling factor. On the other hand, mechanical vibration applied to compacted snow layers has been demonstrated to significantly enhance snow hardness without markedly changing snow density. However, the strengthening effects of mechanical vibration on the uniaxial compressive strength of compacted Antarctic snow, and particularly the underlying mesoscale mechanisms remain poorly understood. The current paper addresses this gap through controlled experiments utilizing compacted Antarctic snow. Two groups of compacted snow samples were prepared: a control group using conventional layered compaction and an experimental group subjected to additional mechanical vibration after compaction. The results indicated that the experimental group achieved an average uniaxial compressive strength of 0.448 MPa, representing a 42.2 % increase compared to the control group (0.315 MPa). Mesoscale analysis revealed that mechanical vibration increased the minimum cut density index (MCDI) from 0.425 g/cm³ to 0.505 g/cm³ and raised the directional connectivity index (DCI) from 0.575 to 0.587, while reducing the mean values and standard deviations of structure and pore thicknesses. It is speculated that compaction creates random large pores and microcracks within particles. Vibration-induced oscillatory stresses propagate these microcracks, fragmenting particles near pores. These fragments then fill pore spaces, yielding more uniform pore distribution while maintaining constant overall density. These findings provide theoretical guidance for optimizing the construction of snow infrastructures in polar and cold regions.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104779"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692564","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}

{"title":"Experimental study of test methods for the acoustic properties of snow","authors":"Xiaomin Chang ,&nbsp;Xuanhao Chen ,&nbsp;Ming Xue ,&nbsp;Guangyu Zuo ,&nbsp;Yinke Dou","doi":"10.1016/j.coldregions.2025.104772","DOIUrl":"10.1016/j.coldregions.2025.104772","url":null,"abstract":"<div><div>Acoustic attenuation is a key property of snow and plays a significant role in avalanche early warning. However, due to the dynamic changes in snow properties under natural environmental conditions, the automated monitoring of snow acoustic attenuation remains highly challenging. In this study, an acoustic testing system was designed using the transmission method to conduct acoustic measurements on natural snow samples and obtain information on the variations in snow acoustic properties under different conditions. Experimental results indicate that under an ambient temperature of −10 °C, the attenuation coefficient of snow layers increases with rising acoustic wave frequency across different snow densities. Additionally, as snow density increases, the attenuation coefficient increases while the boundary sound absorption coefficient decreases. Within the temperature range of −10 °C to 5 °C, the attenuation coefficient shows an increasing trend with rising temperature. In the range of −10 °C to −2.5 °C, the boundary sound absorption coefficient remains relatively stable, while from −2.5 °C to 5 °C, it shows a decreasing trend with increasing temperature. Within a snow water content range of 0–20 %, the attenuation coefficient increases with higher water content, whereas the boundary sound absorption coefficient decreases. Based on the experimental data, predictive models for the attenuation coefficient were developed with respect to ambient temperature and water content. The models demonstrated good predictive performance, with coefficients of determination (R²), root mean square errors (RMSE), biases (BIAS), and Nash-Sutcliffe efficiencies (NASH) of 0.918, 0.061, 0.002, and 0.982 for temperature-based models, and 0.946, 0.026, −0.001, and 0.991 for water content-based models, respectively. These results suggest that the models offer high predictive accuracy and provide a foundation for the automated observation of snow acoustic attenuation characteristics.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104772"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692565","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}

{"title":"Assessing the impacts of climate warming and engineering activities on the thermal regime of permafrost in the Kunlun Mountains, Qinghai-Tibet Railway","authors":"Zhanju Lin,&nbsp;Xuhui Wang,&nbsp;Xuyang Wu,&nbsp;Wenjiao Li,&nbsp;Peng Zhang,&nbsp;Nuocheng Li,&nbsp;Xingwen Fan","doi":"10.1016/j.coldregions.2025.104777","DOIUrl":"10.1016/j.coldregions.2025.104777","url":null,"abstract":"<div><div>The thermal stability of permafrost, a foundation for engineering infrastructure in cold regions, is increasingly threatened by the dual stressors of climate change and anthropogenic disturbance. This study investigates the dynamics of the crushed rock revetted embankment at the Kunlun Mountain Section of the Qinghai-Tibet Railway, systematically investigating the coupled impacts of climate warming and engineering activities on permafrost thermal stability using borehole temperature monitoring data (2008–2024) and climatic parameter analysis. Results show that under climate-driven effects, the study area experienced an air temperature increase of 0.2 °C per decade over the 2015–2024. Concurrently, the mean annual air thawing degree-days (TDD) rose by 13.8 °C·d/a, leading to active-layer thickening at a rate of 3.8 cm·a⁻¹at natural ground sites. From 2008 to 2024, the active layer had thickened by 0.7–0.8 m. At the embankment toe (BH 5), the active-layer thickening rate (3.3 cm·a⁻¹) was 25 % lower than that at the natural ground borehole (3.8 cm·a⁻¹); correspondingly, the underlying permafrost temperature increase rate at the toe (0.3 °C per decade) was lower than that at the natural borehole (0.5–0.6 °C per decade). Permafrost warming rates decreased with depth. Shallow layers (above −2 m) were significantly influenced by climate, with warming rates of 0.3–0.6 °C per decade. In contrast, deep layers (below −10 m) showed warming rates converging with the background atmospheric temperature trend (0.2 °C per decade). Thermal regime disturbance was most pronounced at horizontal distances of 3.0–5.0 m from the embankment. Nevertheless, the crushed-rock revetment maintained a permafrost table 0.6 m shallower than that of natural ground, confirming its “thermal diode” effect (facilitating convective cooling in winter), which partially offset climate warming impacts. This study provides critical empirical data and validates the cooling mechanism of crushed-rock revetment, which is essential for predicting the long-term thermal stability and informing adaptive maintenance strategies for railway infrastructure in warming permafrost regions.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104777"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145692566","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}

{"title":"Transient testing of tensile ice adhesion","authors":"Ali Raza Shaikh,&nbsp;Mete Abbot,&nbsp;Jeanette Hussong,&nbsp;Ilia V. Roisman","doi":"10.1016/j.coldregions.2025.104795","DOIUrl":"10.1016/j.coldregions.2025.104795","url":null,"abstract":"<div><div>Icing of solid surfaces is a critical concern across various industries, as it can compromise the safety, performance, and reliability of systems. Mechanical ice removal is one of the various existing and emerging de-icing strategies. Ice removal is determined partially by the characteristic stresses associated with ice adhesion, specifically the values of the corresponding critical stresses that initiate ice delamination, which involves both adhesion and cohesion phenomena.</div><div>This experimental study presents a novel method for measuring tensile ice adhesion based on stress-free ice bridges. The effects of ice bridge geometry, strain rate, and temperature on tensile ice adhesion are systematically measured, including the critical forces and stresses. The results demonstrate that increasing temperature and strain rate lead to a decrease in the ice adhesion strength. On the other hand, increasing the interface area increases ice adhesion strength, which indicates possible edge effects. This work has the potential to advance technologies aimed at ice removal and ice adhesion mitigation, particularly in applications such as de-icing and anti-icing in the automotive and aerospace industries.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104795"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797703","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}

{"title":"Icephobic performance of low-pressure cold sprayed PEEK SLIPS","authors":"Ruqaya Khammas,&nbsp;Reza Jafari,&nbsp;Heli Koivuluoto","doi":"10.1016/j.coldregions.2025.104791","DOIUrl":"10.1016/j.coldregions.2025.104791","url":null,"abstract":"<div><div>Ice accretion is a global problem that takes place in cold regions and can affect different life fields and industries, and it can cause damage, danger, and operational delays. Icephobic materials, anti-icing surfaces and coatings are widely dealt with nowadays, however, they always come with limitations related to durability. In this paper, slippery liquid-infused porous surfaces (SLIPS) for icephobic purposes were produced using a low-pressure cold spray (LPCS) coating process of a composite mixture of 90 vol% poly-ether-ether-ketone (PEEK) with 10 vol% aluminium oxide (Al₂O₃) to produce a porous coating and infused it with silicon oil to create the SLIPS. Two types of coatings were produced with and without heating assistance during coating production. Coating and SLIPS' properties were characterized by studying the coating and the powder microstructure, surface wettability, roughness, topography, and icephobicity by cyclic icing/de-icing testing. In line with the obtained results, the coating showed low ice adhesion strength of 45 kPa and 43 kPa for these two SLIPS. Re<em>-</em>useability of these SLIPS was observed by refilling them after cyclic icing testing and they showed ice adhesion strengths of 38 kPa and 35 kPa, which in turn, supported their mechanical stability and integrity.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104791"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734146","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}

{"title":"A novel framework for assessing seasonally frozen soil changes in Northeast China by incorporating human activities","authors":"Jiangtao Yu ,&nbsp;Xiaodong Wu ,&nbsp;Dianfan Guo ,&nbsp;Xiangwen Wu ,&nbsp;Shuying Zang","doi":"10.1016/j.coldregions.2025.104768","DOIUrl":"10.1016/j.coldregions.2025.104768","url":null,"abstract":"<div><div>Seasonally frozen soil changes are subject to the dual pressures of climate and human activities, yet there remains a knowledge gap in understanding and quantifying their combined impact. We investigated the first freezing date (FFD), complete thawing date (CTD), and maximum depth of the seasonally frozen soil (MDSF) in Liaoning Province in Northeast China from 1991 to 2020. We developed a novel framework integrating the Geodetector, partial correlation analysis, and the Extreme Gradient Boosting-SHapley Additive exPlanations (XGBoost-SHAP) models to uncover the drivers of seasonally frozen soil changes. Our results demonstrate that over the past 30 years, the FFD was delayed by approximately 9 days, the CTD advanced by approximately 11 days, and the MDSF decreased by approximately 19 cm. Temperature emerged as the primary driver of seasonally frozen soil changes. The explanatory powers of the interaction between heating area and temperature for FFD, CTD, and MDSF are 0.781, 0.757, and 0.813, respectively, demonstrating a significant combined effect between human activities and climate on seasonally frozen soil changes. After controlling for factors such as temperature, the heating area was significantly correlated with FFD, CTD, and MDSF. The XGBoost-SHAP results demonstrated that progressively increasing the heating area threshold beyond 10,000 significantly delays FFD, advances CTD, and reduces MDSF, while population density shows more complex nonlinear effects. By 2060, the MDSF is projected to decrease by 9.64 cm, 19.16 cm, and 36.52 cm under the Shared Socioeconomic Pathway (SSP) scenarios of SSP1–2.6, SSP2–4.5, and SSP5–8.5, respectively. Our study quantifies the significant impact of human activities on seasonally frozen soil changes, and these findings provide direct guidance for formulating climate adaptation policies in cold regions.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104768"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145645563","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}

{"title":"Coupled effects of subzero temperature and impact loading on the dynamic mechanical properties and fracture mechanism of dolomite","authors":"Xiong Yin ,&nbsp;Qifeng Guo ,&nbsp;Zimu Shi ,&nbsp;Jingxuan Yan ,&nbsp;Yunhong Guo ,&nbsp;Fei Li","doi":"10.1016/j.coldregions.2025.104774","DOIUrl":"10.1016/j.coldregions.2025.104774","url":null,"abstract":"<div><div>To investigate the dynamic mechanical response and fracture mechanisms of frozen saturated dolomite under impact loading, dynamic compression tests were performed using a split Hopkinson pressure bar (SHPB) system over a temperature range from −40 °C to 25 °C and impact pressures ranging from 0.26 MPa to 0.50 MPa. A relationship model describing the correlation between the fractal characteristics and energy dissipation of frozen saturated dolomite was established. Scanning electron microscopy (SEM) was employed to examine the post-impact microstructure of the samples, thus revealing the dynamic fracture mechanisms of dolomite under combined subzero temperature and impact loading conditions. The results indicate that the dynamic mechanical behavior of dolomite exhibits distinct temperature and strain-rate effects. As the temperature decreases and the strain rate increases, both the dynamic compressive strength and elastic modulus of the samples increase correspondingly. Variations in freezing temperature and strain rate alter the energy dissipation mechanisms of the samples, which in turn influence the fragment-size distribution characteristics. As the temperature decreases, the energy dissipation density of frozen saturated dolomite exhibits a clear quadratic relationship with the fractal dimension. In contrast, as the strain rate increases, these two parameters demonstrate a significant logarithmic relationship. In addition, the freezing temperature exerts a marked influence on the microscopic fracture characteristics of saturated dolomite. At room temperature, both brittle and localized ductile fractures are observed on the microfracture surfaces of the saturated samples, thereby indicating composite fracture characteristics. However, as the temperature decreases to subzero temperatures, the microfracture mode transforms into a typical brittle fracture, and the brittleness becomes increasingly evident with further temperature reduction. These findings provide valuable theoretical guidance for the design and optimization of blasting parameters in open-pit mines located in cold alpine regions.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104774"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145645466","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}

{"title":"Evolution of freezing in drainage ditches of high-speed railway tunnels in cold regions","authors":"Ruisong Yang ,&nbsp;Peng Xu ,&nbsp;Yimin Wu","doi":"10.1016/j.coldregions.2025.104778","DOIUrl":"10.1016/j.coldregions.2025.104778","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The freezing of drainage ditches in high-speed railway tunnels in cold regions can lead to a series of frost-related damages, seriously compromising the normal operation of the tunnel. To more effectively address frost damage in drainage ditches, the longitudinal temperature fields of the representative Hufengling Tunnel and Zhishan Tunnel in severe cold regions of China were monitored and recorded from December to May of the following year. Based on actual engineering conditions, a numerical simulation model for the temperature field in the drainage ditches of cold-region tunnels was established using ANSYS software. The temperature field on the inner walls of the drainage ditches was analyzed, and a coupled flow-heat transfer calculation model for water within the ditches was constructed through theoretical analysis to investigate the water freezing mechanism. Finally, by utilizing the longitudinal temperature distribution data of Hufengling Tunnel on February 6, the sections of the tunnel drainage ditches prone to freezing were predicted. The results indicate that the monthly average temperature in cold-region tunnels increases with the distance from the tunnel portal, while the temperature in the middle section of the tunnel remains relatively stable. The influence of short-term temperature fluctuations on the drainage ditch temperature field diminishes with increasing depth. Both insulated side ditches and insulated central drainage ditches are prone to freezing, with the freezing of insulated side ditches poses a primary challenge in frost damage prevention for cold-region tunnels. Under extremely low-temperature conditions, freezing may occur throughout the insulated side ditches in both the Hufengling Tunnel and Zhishan Tunnel. Under the condition that other factors remain constant, the rate of decrease in water temperature within the drainage ditches decreases with increasing flow velocity and equivalent radius, but increases with a higher convective heat transfer coefficient. A higher initial water temperature results in a correspondingly higher temperature in the drainage ditches; however, under all scenarios, the water temperature eventually equilibrates with that of the drainage ditches wall. The water temperature fluctuates synchronously in response to variations in the ditch wall temperature, while flow velocity has limited effect on the amplitude of these fluctuations. When the equivalent radius remains constant, the flow rate is the dominant factor determining the distance water travels before freezing. In the Hufengling Tunnel, no freezing was observed in the drainage ditches during the cold season. However, during the warm season, when the flow rate is 6.28 L·s&lt;sup&gt;−1&lt;/sup&gt;, freezing may occur in the insulated side ditches within approximately 2800 m from the tunnel portal and in the insulated central drainage ditches between 1000 and 3400 m from the portal. Higher flow rates correspond to shorter freezing sections, w","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104778"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145734150","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}

{"title":"A double-a ice detachment failure criterion for overhead transmission lines subjected to shock loads","authors":"Chao Zhou ,&nbsp;Liangchen Zhao ,&nbsp;Kun Peng Ji","doi":"10.1016/j.coldregions.2025.104790","DOIUrl":"10.1016/j.coldregions.2025.104790","url":null,"abstract":"<div><div>A double-<em>a</em> ice detachment failure criterion is proposed for iced overhead transmission lines to evaluate the transient response of line systems subjected to shock loads. The criterion incorporates the strain energy density factor, a fracture mechanics parameter, to model the crack propagation process leading to ice shedding, and is implemented into finite element analysis by setting ice element critical acceleration <em>a</em>_c and <em>a</em>₀. The criterion is defined as follows: if the ice element acceleration <em>a</em> exceeds the critical value <em>a</em>_c, ice sheds from overhead transmission lines. When <em>a</em>_c <em>&gt; a &gt; a</em>₀, no ice shedding occurs, but subcritical crack growth necessitates an update of the critical acceleration from <em>a</em>_c0 to <em>a</em>_c1. If <em>a</em> ≤ <em>a</em>₀, the ice remains adhered, and <em>a</em>_c remains unchanged. The criterion was validated through experimental tests and compared with the previous ice detachment failure criterion in DAC de-icing cases. The results show that the presented criterion can accurately predict the ice shedding rate and key parameters of the maximum tension, maximum displacement, especially in multiple shock de-icing conditions.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"243 ","pages":"Article 104790"},"PeriodicalIF":3.8,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797711","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}

{"title":"Research on the mechanical properties and fracture morphology of cold-frozen red sandstone at different strain rates","authors":"Hao Wang ,&nbsp;Nao Lv ,&nbsp;Qi Zong ,&nbsp;Haibo Wang","doi":"10.1016/j.coldregions.2025.104746","DOIUrl":"10.1016/j.coldregions.2025.104746","url":null,"abstract":"<div><div>To further explore the effects of water saturation, loading rate and low temperature on the mechanical properties of red sandstone at engineering sites, uniaxial compression tests were carried out on low-temperature treated rocks at different strain rates via an electrohydraulic servo press and SHPB test device. The effects of water saturation, low temperature and strain rate on the compressive properties, energy dissipation and fracture morphology of in situ red sandstone are analyzed. The results are as follows: 1) The static and dynamic compressive strengths of dry red sandstone samples increase with decreasing temperature, and the compressive strength of saturated red sandstone samples peaks at −15 °C. 2) With increasing temperature, the dissipative energy of dry red sandstone samples increases continuously under static and dynamic loads, and the dissipative energy of saturated red sandstone samples first slightly increases but then continuously decreases. With increasing strain rate, the energy dissipation of the sample first increases but then decreases, and the energy dissipation rate of the sample is the highest under an impact pressure of 0.4 MPa. 3) The influence of temperature on the peak strength of dry and water-saturated red sandstone samples is greater than that of strain rate, the influence on the dissipated energy of dry red sandstone samples is greater than that of strain rate, and the influence on the dissipated energy of water-saturated red sandstone samples is lower than that of strain rate. 4) Under static loading, the low-temperature frozen red sandstone samples exhibit both shear failure modes and tensile failure modes. Under impact loading, the dry samples all experienced compost failure, whereas the water-saturated samples experienced splitting tensile failure and axial compression failure. Low-temperature freezing reduces the degree of breakage of the sample. The influence of the low-temperature environment on the site rock mass should be fully considered, and the blasting construction scheme should be adjusted to ensure the construction effect.</div></div>","PeriodicalId":10522,"journal":{"name":"Cold Regions Science and Technology","volume":"242 ","pages":"Article 104746"},"PeriodicalIF":3.8,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145517247","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}