Acta Geotechnica最新文献_第7页

Durability of chemically treated coir geotextiles coated with epoxy resin in different degradation environments 环氧树脂涂覆化学处理的椰壳土工布在不同降解环境下的耐久性

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-24 DOI: 10.1007/s11440-025-02652-5

Liangyong Li, Tianxiang Peng, Qingsong Zhang

{"title":"Durability of chemically treated coir geotextiles coated with epoxy resin in different degradation environments","authors":"Liangyong Li, Tianxiang Peng, Qingsong Zhang","doi":"10.1007/s11440-025-02652-5","DOIUrl":"10.1007/s11440-025-02652-5","url":null,"abstract":"<div><p>The high water absorption of coir fibers leads to poor durability, which limits the application of coir geotextiles in engineering. In this paper, the changes of tensile strength and elongation at break of chemically treated coir geotextiles coated with epoxy resin (CGCE) in chemical, physical and natural degradation environments were studied. The macro and micro morphology of CGCE at the final degradation stage in various environments were analyzed, and the degradation rules of CGCE were compared with untreated coir geotextiles (UCG) and chemically treated coir geotextiles (CCG). The results show that UCG, CCG and CGCE have the slowest tensile strength loss in sea water, followed by pure water and hydrochloric acid (HCl) solution, with the fastest tensile strength loss observed in NaOH solution. As the number of dry–wet cycles increases, the tensile strength loss of CGCE is less than that of UCG and CCG at the same exposure time. Additionally, the tensile strength loss of CGCE decreases as burial depth increases. The cross-sectional micro morphology of CGCE under different degradation environments shows varying degrees of separation and fiber pull-out between coir fibers and the epoxy resin.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 9","pages":"4613 - 4629"},"PeriodicalIF":5.7,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Performance of radial fins as a novel upheaval buckling mitigation strategy of subsea pipelines 径向翅片作为一种新型海底管道扰动屈曲缓解策略的性能研究

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-23 DOI: 10.1007/s11440-025-02646-3

Debtanu Seth, Bappaditya Manna, J. T. Shahu

{"title":"Performance of radial fins as a novel upheaval buckling mitigation strategy of subsea pipelines","authors":"Debtanu Seth, Bappaditya Manna, J. T. Shahu","doi":"10.1007/s11440-025-02646-3","DOIUrl":"10.1007/s11440-025-02646-3","url":null,"abstract":"<div><p>Offshore pipelines, critical for the transport of fluidised fuel from offshore wells to onshore facilities, are often subjected to upheaval buckling due to thermal axial stress. While conventional buckling mitigation techniques are available, they often suffer from case-specific limitations and substantial installation and operational costs. The current study proposes an innovative technique to augment the resistance of pipe segments against uplift buckling through the integration of radial fins, offering a potentially more versatile and cost-effective solution. Fourteen experiments were conducted utilising seven pipe configurations embedded in 13 kPa kaolin clay bed at two different depths. The effects of radial fins on resistance against uplift buckling, pressure encircling the pipe segment, soil surface heaving, and the displacement field within surrounding soil were examined. It was found that uplift resistance of pipe segments was improved by fin integration, with uplift resistance further influenced by suction generation below the pipe segment. An expansion in the soil failure mechanism around fin-integrated pipes was revealed through displacement field obtained using particle image velocimetry, providing insights into uplift resistance for different configurations and embedment depths. The size of this failure mechanism was correlated with uplift resistance, and transitions with varying pipe embedment depth were observed. Based on these results, an optimised pipe configuration was proposed, wherein improved performance was balanced with efficient material usage in production, thus demonstrating the potential of radial fins in the enhancement of offshore pipeline stability.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"4255 - 4288"},"PeriodicalIF":5.7,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 temperature effects on slope serviceability and subsequent rainfall-induced instability: a comparative centrifuge study 温度对斜坡可用性和随后降雨引起的不稳定的影响的研究：一项比较离心机研究

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-23 DOI: 10.1007/s11440-025-02636-5

Yikai Wang, Qi Zhang, Shuai Zhang, Haiyi Zhong, Charles Wang Wai Ng

{"title":"Investigation of temperature effects on slope serviceability and subsequent rainfall-induced instability: a comparative centrifuge study","authors":"Yikai Wang, Qi Zhang, Shuai Zhang, Haiyi Zhong, Charles Wang Wai Ng","doi":"10.1007/s11440-025-02636-5","DOIUrl":"10.1007/s11440-025-02636-5","url":null,"abstract":"<div><p>Under a changing climate, the serviceability and stability of slopes are significantly influenced by the extreme temperature and rainfall. However, the distinct impacts of varying temperature loading patterns on the thermo-mechanical response of slopes and the resulting instability during subsequent extreme rainfall events remain underexplored. This research investigates the effects of different temperature loadings on slope serviceability and explores the role of temperature-induced desiccation cracks in compromising slope stability during subsequent extreme rainfall. Two centrifuge tests were conducted, each involving a temperature loading (<i>i.e</i>. thermal cycles or elevated temperature) followed by extreme rainfall with 100-year return period. During the temperature loading phase, both slopes experience settlement exceeding 1% of their height, approaching the threshold for serviceability breach. The slope subjected to elevated temperature continuously settles, whereas the slope subjected to thermal cycles exhibits downslope ratcheting movement. Due to the higher evaporation rate induced by more extreme temperature boundary, the slope subjected to elevated temperature possesses higher crack intensity factor (1.2% vs. 0.6%) and deeper crack depth (5.4 m vs. 3.8 m) compared to the slope subjected to thermal cycles. These crack characteristics are critical in influencing failure mode during extreme rainfall period, as they alter the rate at which preferential flow saturates the soil. This can further affect the rate of soil shear strength reduction and the formation of slip surface. Consequently, the slope subjected to elevated temperature experiences progressive failure with its slope angle degrading to the soil friction angle, while the slope subjected to thermal cycles undergoes substantial settlement over 10% of its original height.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"4199 - 4212"},"PeriodicalIF":5.7,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Undrained cyclic loading of cylindrical cavity in sands with the SANISAND model 基于SANISAND模型的砂体圆柱空腔不排水循环加载

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-21 DOI: 10.1007/s11440-025-02643-6

Li Pang, He Yang, Chong Jiang

{"title":"Undrained cyclic loading of cylindrical cavity in sands with the SANISAND model","authors":"Li Pang, He Yang, Chong Jiang","doi":"10.1007/s11440-025-02643-6","DOIUrl":"10.1007/s11440-025-02643-6","url":null,"abstract":"<div><p>The cyclic response in saturated sand is gaining increasing interest owing to the soil-structure interaction in seismic regions. The evolution of the pore water pressure in liquefiable soil can significantly reduce soil strength and impact the structural dynamic response. This paper proposes a semi-analytical solution for a cylindrical cavity subjected to cyclic loading in saturated sands, incorporating an anisotropic, non-associated SANISAND model. The problem is formulated as a set of first-order partial differential equations (PDEs) by combining geometric equations, equilibrium equations, stress–strain relationships and boundary conditions. Due to the non-self-similar nature of this problem, these PDEs are solved by the hybrid Eulerian–Lagrangian approach to determine the cyclic response of the cavity. Then finite-element simulations with a user-defined subroutine are performed to validate the proposed solution. Finally, parametric studies are presented with the focus on soil parameters and cyclic loading history. It is found that the cyclic responses of the cavity in saturated sands are sensitive to the initial void ratio, and the at-rest coefficient of earth pressure primarily affects the monotonic response but marginally affects the cyclic response. Cylindrical cavities are more likely to liquefy when the sands are compacted in a loose state and under lower displacement amplitudes. The proposed solution has potential use for future research on the cyclic response of the soil-structure interaction in geotechnical engineering.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 9","pages":"4431 - 4451"},"PeriodicalIF":5.7,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Performance of imperfect trench installation box culvert on soft ground 软土地基上不完全沟槽安装箱涵的性能研究

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-21 DOI: 10.1007/s11440-025-02647-2

Ding-Bao Song, Pei-Chen Wu, Bao-Guo Chen, Guo-Qing Ren

{"title":"Performance of imperfect trench installation box culvert on soft ground","authors":"Ding-Bao Song, Pei-Chen Wu, Bao-Guo Chen, Guo-Qing Ren","doi":"10.1007/s11440-025-02647-2","DOIUrl":"10.1007/s11440-025-02647-2","url":null,"abstract":"<div><p>The imperfect trench installation (ITI) method is commonly employed to reduce the enormous high backfill load on the box culvert, and its load reduction effectiveness has been widely studied. However, limited research has focused on the behavior of ITI culvert on soft ground. To address this gap, numerical simulations verified by model tests were conducted to investigate the performance of ITI culverts on soft ground and to compare it with that on rigid ground. Key comparison parameters included vertical earth pressure on the culvert top, foundation contact pressure, lateral earth pressure on the sidewall, and settlement above and beneath the culvert. A parametric study was also performed to examine the influence of ground soil parameters, including elastic modulus, friction angle, cohesion and thickness of soft layer, on ITI culvert behavior. Additionally, the impact of improved ground characteristics (i.e., thickness, width and stiffness) was analyzed. The results indicate that soft ground conditions, particularly lower soil stiffness, adversely affect the load reduction performance of ITI method compared to rigid ground. Furthermore, this negative effect can be mitigated by improving the soft ground beneath the culvert in a limited width (e.g., two to three times the culvert width).</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 9","pages":"4599 - 4612"},"PeriodicalIF":5.7,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Evolution of anisotropic stiffness and damping ratio of soft clay by bidirectional step-amplitude cyclic triaxial tests 双向阶幅循环三轴试验研究软粘土各向异性刚度和阻尼比的演化规律

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-21 DOI: 10.1007/s11440-025-02620-z

Zhong-Liang Zhang, Zhen-Dong Cui, Wen-Xiang Yan

{"title":"Evolution of anisotropic stiffness and damping ratio of soft clay by bidirectional step-amplitude cyclic triaxial tests","authors":"Zhong-Liang Zhang, Zhen-Dong Cui, Wen-Xiang Yan","doi":"10.1007/s11440-025-02620-z","DOIUrl":"10.1007/s11440-025-02620-z","url":null,"abstract":"<div><p>Soft clay is the primary soil type encountered in engineering construction in the eastern coastal regions of China. The deformation characteristics of soft clay are closely related to its inherent stiffness. Under the action of long-term geostatic stress and external load, the dynamic behavior and characteristics of soil in vertical and horizontal directions are different, i.e., anisotropy. In this study, the dynamic parameters of saturated soft clay samples were investigated through bidirectional dynamic step-amplitude cyclic triaxial experiments. The anisotropic stiffness evolution of soft clay over a wide strain range was analyzed, and the effects of different consolidation states on the development of dynamic shear modulus and damping ratio were also examined. Under the same confining pressure, the soft clay samples subjected to axial step-amplitude cyclic loading exhibited higher ultimate dynamic stress values in backbone curves compared to those under radial step-amplitude cyclic loading, while the obtained shear modulus showed the opposite trend. The anisotropic stiffness ratio of soft clay samples tended to increase with increasing confining pressure, with an average value of 1.25 in the range of 100–300 kPa. The shear modulus of the samples increased with increasing confining pressure and consolidation stress ratio but decreased with increasing overconsolidation ratio (OCR).</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 9","pages":"4411 - 4430"},"PeriodicalIF":5.7,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

On enhancing the mechanical behaviors of bio-carbonation of reactive magnesia cement solidified construction and demolition wastes via fiber reinforcement 纤维增强活性镁水泥固化建筑垃圾生物碳化力学性能的研究

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-20 DOI: 10.1007/s11440-025-02645-4

Dian-Long Wang, Xiao-Hua Pan, Chao-Sheng Tang, Min Shi, Rui Wang, Lin Li, Zhi-Hao Dong, Jin-Jian Xu

{"title":"On enhancing the mechanical behaviors of bio-carbonation of reactive magnesia cement solidified construction and demolition wastes via fiber reinforcement","authors":"Dian-Long Wang, Xiao-Hua Pan, Chao-Sheng Tang, Min Shi, Rui Wang, Lin Li, Zhi-Hao Dong, Jin-Jian Xu","doi":"10.1007/s11440-025-02645-4","DOIUrl":"10.1007/s11440-025-02645-4","url":null,"abstract":"<div><p>The bio-carbonation of reactive magnesia cement (RMC) method was coupled with the fiber reinforcement to enhance the mechanical properties of solidified construction and demolition waste (CDW) for geotechnical construction. The typical polypropylene fiber (PF) with different fiber content and lengths was employed to prepare the fiber-reinforced bio-carbonation of RMC solidified CDW (F-BC samples). Changes in the mechanical properties and the microstructures induced by fiber reinforcement were elaborated. Experimental results indicated that the fiber reinforcement presents an optimization method for enhancing the mechanical properties of F-BC samples, improving the UCS and toughness, reducing the significant brittleness, and mitigating instantaneous failure. With the higher fiber content, the UCS reached the maximum UCS of 2.41 MPa at 0.2% content. The residual strength increased monotonically, the brittleness index decreased, and the toughness significantly improved. With the longer PF, the UCS obtained the maximum value of 2.24 MPa at the 9 mm PF. The mechanical properties did not show significant changes with PF lengths. The included PF can be interwoven and anchored in the pores and surfaces of CDW by the bio-carbonation of RMC products to form 3D spatial network structures, restricting sample deformation. After sample failure, residual fibers across the failure surfaces can act as bridges to inhibit further deformation. Excessive fiber content and overlong fibers were detrimental to the reinforcement effect. The optimal PF content is 0.2%, and the optimal PF length is 9 mm. The results are of some significance for the geotechnical stability and safety.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 9","pages":"4535 - 4552"},"PeriodicalIF":5.7,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144868665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 3D numerical investigation of seismic stability of coral sand–raft–superstructure improved with foundation compaction 基础压实改善珊瑚砂筏上部结构地震稳定性的试验与三维数值研究

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-19 DOI: 10.1007/s11440-025-02639-2

Qi Wu, Xuanming Ding, Yanling Zhang

{"title":"Experimental and 3D numerical investigation of seismic stability of coral sand–raft–superstructure improved with foundation compaction","authors":"Qi Wu, Xuanming Ding, Yanling Zhang","doi":"10.1007/s11440-025-02639-2","DOIUrl":"10.1007/s11440-025-02639-2","url":null,"abstract":"<div><p>Unlike common terrestrial sands, the seismic performance of densified coral sand foundations is unclear. Combining shaking table tests and numerical calculations, the seismic response and internal deformation of coral sand–raft–superstructure system with different relative densities were studied. The intrinsic particle-scale causes of variation in seismic response of coral sand due to densification were discussed. Moreover, the microscopic mechanism of the change in the dynamic stability of coral sand as foundation was revealed by comparing with terrestrial sands. The results show that the densification of coral sand foundation reduces the settlements of soil–raft–superstructure, but enlarges the acceleration and bending moment of the superstructure. Moreover, the excess pore pressure ratio of the coral sand foundation decreases with the increase of relative densities due to the stronger interlocking effect among particles. In the seismic design of coral sand foundation, it is worth noting that although the densification decreases the liquefaction potential of the coral sand foundation, attention should be paid to the amplification of the vibration response of the superstructure.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"4231 - 4254"},"PeriodicalIF":5.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Evaluation of advanced soil models for the cyclic soil-structure interaction of integral bridges 整体桥梁循环土-结构相互作用的先进土模型评价

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-19 DOI: 10.1007/s11440-025-02632-9

A. Stastny, G. Medicus, V. Galavi, M. Tafili, F. Tschuchnigg

{"title":"Evaluation of advanced soil models for the cyclic soil-structure interaction of integral bridges","authors":"A. Stastny, G. Medicus, V. Galavi, M. Tafili, F. Tschuchnigg","doi":"10.1007/s11440-025-02632-9","DOIUrl":"10.1007/s11440-025-02632-9","url":null,"abstract":"<div><p>Integral bridges with longer spans experience an increased cyclic interaction with their granular backfills, particularly due to seasonal thermal fluctuations. To accurately model this interaction behaviour under cyclic loading, it is crucial to employ appropriate constitutive models and meticulously calibrate and test them. For this purpose, in this paper two advanced elastoplastic (DeltaSand, Sanisand-MS) and two hypoplastic (Hypo+IGS, Hypo+ISA) constitutive models with focus on small strain and cyclic behaviour are investigated. The soil models are calibrated based on a comprehensive laboratory programme of a representative highly compacted gravel backfill material for bridges. The calibration procedure is shown in detail and the model capabilities and limitations are discussed on the element test level. Additional triaxial tests with repeated un- and reloading reveal significant over- and undershooting effects for the majority of the investigated material models. Finally, cyclic finite element analyses on the soil-structure interaction of an integral bridge are conducted to compare the performance of the soil models. Qualitatively similar cyclic evolution of earth pressures are detected for the soil models at various bridge lengths and test settings. However, a substantially different cyclic settlement behaviour is observed. Additionally, the investigation highlights severe overshooting effects associated with the tested hypoplastic soil models. This phenomenon is studied in detail using a single integration point analysis. Supplementary studies reveal that the foot point deformation of the abutment significantly influences the lateral passive stress mobilisation and the amount of its increase with growing seasonal cycles.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 9","pages":"4385 - 4410"},"PeriodicalIF":5.7,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02632-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144869128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Rheological and micromechanical analysis of fluidized EICP-cured soils 流态化eicp固化土的流变学和微观力学分析

IF 5.7 1区工程技术

Acta Geotechnica Pub Date : 2025-05-16 DOI: 10.1007/s11440-025-02624-9

Guanzhou Ren, Henghui Fan, Yonggang Zhang, Yuan Gao, Minqiang Meng, Yuyang Ji, Mengyao Zhou, Zhichao Liang, Tao Chen

{"title":"Rheological and micromechanical analysis of fluidized EICP-cured soils","authors":"Guanzhou Ren, Henghui Fan, Yonggang Zhang, Yuan Gao, Minqiang Meng, Yuyang Ji, Mengyao Zhou, Zhichao Liang, Tao Chen","doi":"10.1007/s11440-025-02624-9","DOIUrl":"10.1007/s11440-025-02624-9","url":null,"abstract":"<div><p>The enzyme-induced calcium carbonate precipitation (EICP) method has been utilized for curing low-permeability clay by directly mixing the reaction solution with soil. The added reaction solution quantity is limited by the optimal water content, producing insufficient calcium carbonate. Herein, the high-activity urease and high-concentration cementation solution efficacy in treating dispersive soils was evaluated. Phase transitions and structural modifications in EICP-cured soils were investigated through oscillatory amplitude scanning. The soil gradation influence on the EICP treatment effectiveness was assessed. The fluidized EICP-cured soil cementation and rupture mechanisms were investigated by viscosity measurements, electron microscopy, and zeta potential evaluations. A 3 M cementation solution, coupled with 500g/L of soybean urease, significantly enhanced the soil shear resistance, increasing it by 339% to 1807%. The EICP-cured soil gradually transitioned from a fluid to a paste and eventually to a solid within 168 h. High-clay-particle-content soils exhibited pronounced increases in shear resistance after EICP treatment. Under dynamic loading, three shear crack types emerged in EICP-cured soils, emphasizing the importance of soybean protein viscosity and calcium carbonate crystal filling–bonding capability in enhancing soil structural stability. The fluid solidification effectiveness in treating fine-grained soils utilizing EICP was validated through erosion trenches in fluid-solidified check dams, validating its potential.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 8","pages":"4113 - 4132"},"PeriodicalIF":5.7,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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