Acta Geotechnica最新文献_第2页

A new root–soil interface contact model to simulate the overturning behaviour of root system architectures 一个新的根-土界面接触模型来模拟根系结构的倾覆行为

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-17 DOI: 10.1007/s11440-025-02555-5

Jun Zhu, Anthony Kwan Leung, Jonathan Adam Knappett, Xingyu Zhang, Yu Wang

{"title":"A new root–soil interface contact model to simulate the overturning behaviour of root system architectures","authors":"Jun Zhu, Anthony Kwan Leung, Jonathan Adam Knappett, Xingyu Zhang, Yu Wang","doi":"10.1007/s11440-025-02555-5","DOIUrl":"10.1007/s11440-025-02555-5","url":null,"abstract":"<div><p>Correctly assessing overturning resistance of tree root systems is vital to designing sustainable and resilient urban forestry. In previous numerical modelling to investigate root anchorage behaviour, none of the root–soil contact models employed was able to capture slipping at the root–soil interface of complex root system architectures efficiently. This study proposed, derived and implemented a novel, computationally efficient, three-dimensional root–soil contact model that can capture interfacial strain-softening shearing behaviour for an arbitrary root system architecture independent from the spatial discretisation of the surrounding soil within a 3D finite-element model. Validation against existing pull-out test and centrifuge data revealed that the model well captured root pull-out and tree overturning behaviours. The validated model was subsequently used to investigate the transfer mechanisms of artificially generated root system architectures when growing with and without the presence of underground walls. Windward root segments that were more closely aligned with the lateral push provided the most contribution to resisting overturning. The presence of underground walls made the root system architecture highly asymmetric, forming a taproot complex that ‘interlocked’ the surrounding soil to provide overturning resistance. The walls also restricted the relative root–soil displacement, reducing the variability in the overturning moment.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"1969 - 1989"},"PeriodicalIF":5.6,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-025-02555-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919141","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

A novel three-dimensional mechanical model for rotary cutting in soil considering wear status and its experimental verification 考虑磨损状态的土中旋转切削三维力学模型及其实验验证

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-11 DOI: 10.1007/s11440-025-02549-3

Xiang Shen, Dajun Yuan, Jun Wu, Tong Qiu, Xiangsheng Chen, Dalong Jin, Jiuqi Wu

{"title":"A novel three-dimensional mechanical model for rotary cutting in soil considering wear status and its experimental verification","authors":"Xiang Shen, Dajun Yuan, Jun Wu, Tong Qiu, Xiangsheng Chen, Dalong Jin, Jiuqi Wu","doi":"10.1007/s11440-025-02549-3","DOIUrl":"10.1007/s11440-025-02549-3","url":null,"abstract":"<div><p>Cutter is the main cutting tool for shield tunneling in soft soil, so the mechanism of cutter cutting soil is the basis of efficient shield tunneling. This paper proposes a model for revealing the cutting mechanics of shield cutter in soft soil considering the effect of wear. A new analytical method for calculating the cutter force, which can be used in soft soil, was established based on the theory of Rankine's passive earth pressure. The model is composed of three parts: a central failure zone and two side failure zones. To verify the proposed method, an indoor cutter wear test system was independently developed, and the test results show that the proposed model is more in line with the real cutting state compared with the Mckyes–Ali model. Parametric analysis indicates that the parameters associated with the cutter (width, front angle, blade angle, and cutting depth) have important influences on the cutter force and the cutting ability. The results also show that the cutter front angle and blade angle both have a significant impact on the cutter force and the cutting ability. In practical applications, it is essential to strike a balance between the decreased cutting ability of the cutters and the overall improvement in shield tunneling efficiency.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 4","pages":"1661 - 1679"},"PeriodicalIF":5.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716952","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

Dynamic response and fatigue damage analysis of offshore wind turbines supported by four-pile jacket in clays under typhoons 台风作用下粘土中四桩夹套海上风力发电机动力响应及疲劳损伤分析

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-11 DOI: 10.1007/s11440-024-02526-2

Xinglei Cheng, Mengmeng Liu, Qiang Li, Dechun Lu, Xiuli Du

{"title":"Dynamic response and fatigue damage analysis of offshore wind turbines supported by four-pile jacket in clays under typhoons","authors":"Xinglei Cheng, Mengmeng Liu, Qiang Li, Dechun Lu, Xiuli Du","doi":"10.1007/s11440-024-02526-2","DOIUrl":"10.1007/s11440-024-02526-2","url":null,"abstract":"<div><p>In the transitional waters of 30 to 90 m, jacket foundation has great application potential due to its advantages of light weight, high structural stiffness and good stability. In addition to the long-term normal wind and waves, the wind turbines will suffer from typhoons and waves in extreme bad weather. Currently, research on the dynamic response of jacket supported OWTs in clay under severe typhoons is very rare. The study develops a numerical method to calculate the dynamic response and fatigue damage of jacket supported OWTs under typhoon loads by incorporating a simplified single bounding surface model of clays. Through three-dimensional numerical analysis across various scenarios, this study investigates the dynamic response characteristics of jacket supported OWTs on clay soil. It also examines the impact of wind-wave coupling effects on the fatigue damage experienced by these structures. It was found that severe typhoons can lead to notable permanent tilting of the jacket foundation, thereby failing to meet the requirements of normal serviceability limits. The most critical nodes of the OWT are situated at the mudline of the pile foundations, followed closely by the bottom of the tower structure. The most significant fatigue damage occurs for wind-wave co-directional coupling loading along the orthogonal direction of the OWT. The research outcomes provide valuable guidance for enhancing the typhoon-resistant design of jacket supported OWTs.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2461 - 2481"},"PeriodicalIF":5.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919236","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

A fully resolved SPH-DEM for simulation of debris flows with arbitrary particle shapes impacting flexible barriers 模拟任意颗粒形状冲击柔性屏障的泥石流的全分辨SPH-DEM

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-10 DOI: 10.1007/s11440-025-02544-8

Hao Xiong, Mengjie Hao, Debo Zhao, Xiaoxuan Gan, Zhen-Yu Yin, Xiangsheng Chen

{"title":"A fully resolved SPH-DEM for simulation of debris flows with arbitrary particle shapes impacting flexible barriers","authors":"Hao Xiong, Mengjie Hao, Debo Zhao, Xiaoxuan Gan, Zhen-Yu Yin, Xiangsheng Chen","doi":"10.1007/s11440-025-02544-8","DOIUrl":"10.1007/s11440-025-02544-8","url":null,"abstract":"<div><p>This study presents a fully resolved numerical method coupling framework for capturing the interaction between debris flows and flexible barriers. The proposed coupling method combines a simplified flexible wire representation, smoothed particle hydrodynamics (SPH), and discrete element method (DEM). Specifically, the flexible wire representation is used to represent a flexible barrier that intercepts debris flows. The coupled SPH-DEM simulates a two-phase debris flow containing arbitrarily shaped boulders. Additionally, a modified dynamic boundary method (mDBC) is employed to couple SPH with DEM. These three methods are strongly coupled to simulate the behavior of boulders in debris flows and improve the efficiency and accuracy of the interaction between flexible barriers and debris flows. The proposed coupling framework is evaluated through a series of verification instances, which are consistent with experimental observations. Subsequently, the impact dynamics of the two-phase debris flow on the flexible barrier is modeled and analyzed. Overall, the framework holds great potential for the design and optimization of flexible barriers for debris flow mitigation in engineering practice.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 3","pages":"1403 - 1430"},"PeriodicalIF":5.6,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571021","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

Mechanical properties and reinforcing mechanisms of coupled–carbonated recycled fine aggregates (RFA) 耦合碳化再生细集料（RFA）的力学性能及增强机理

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-02-06 DOI: 10.1007/s11440-024-02527-1

Zhexun Liu, Man Li, Huan He, Jing Ren, Songyu Liu, Xiang Zhang

{"title":"Mechanical properties and reinforcing mechanisms of coupled–carbonated recycled fine aggregates (RFA)","authors":"Zhexun Liu, Man Li, Huan He, Jing Ren, Songyu Liu, Xiang Zhang","doi":"10.1007/s11440-024-02527-1","DOIUrl":"10.1007/s11440-024-02527-1","url":null,"abstract":"<div><p>The reusing of waste concrete aggregate in geotechnical engineering has drawn significant attention due to its already high but still increasing annual production globally. Due to low particle strength and undesirable grading characteristics, recycled fine aggregates (RFA), comprising up to 40% of recycled aggregates, are often discarded as waste. Aiming to reuse RFA as a substitute of cement-stabilized aggregates in highway subbase/base construction, the effectiveness and mechanisms of the MgO carbonation technique, which enables the coupled carbonation of RFA and the bonding agent MgO, on strengthening of the RFA were systematically investigated. The influence of water-to-cement ratio, MgO content, compaction density, and carbonation time on the physical–mechanical properties was thoroughly investigated. The carbonation significantly enhanced the strength of the RFA–MgO specimens, with 10% of MgO inclusion leading to 12.29 MPa unconfined compression strength. However, different from traditional cement stabilization, excessive MgO inclusion and high compaction density can be detrimental to the overall strength because of the possible negative effect on the CO<sub>2</sub> transport. Microstructure analysis exhibited that rodlike nesquehonite, together with the calcite produced by the old cement on the surface of the RFA, provided the main bonding strength. Composite products such as magnesium silicate were observed, manifesting the contribution of the reaction between the MgO and the siliceous material on the surface of RFA to the strength growth. The results demonstrate the immense application potential of reinforced RFA and provide promising and sustainable method for the strengthening and application of RFA in road engineering projects.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2345 - 2368"},"PeriodicalIF":5.6,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919163","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

Probabilistic characterization of subsurface stratigraphic configuration by merging borehole and geophysical data 结合钻孔和地球物理资料的地下地层配置的概率表征

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-01-31 DOI: 10.1007/s11440-025-02550-w

Chao Zhao, Wenping Gong, C. Hsein Juang, Huiming Tang, Zhongqiang Liu, Xinli Hu

{"title":"Probabilistic characterization of subsurface stratigraphic configuration by merging borehole and geophysical data","authors":"Chao Zhao, Wenping Gong, C. Hsein Juang, Huiming Tang, Zhongqiang Liu, Xinli Hu","doi":"10.1007/s11440-025-02550-w","DOIUrl":"10.1007/s11440-025-02550-w","url":null,"abstract":"<div><p>Subsurface stratigraphic configuration at a site is often challenging to characterize accurately, due to the complexity and inherent spatial variability of strata, along with the limited availability of site investigation data; thus, considerable stratigraphic uncertainty is induced. Site investigation aims to characterize and reduce this uncertainty, whereby borehole and geophysical explorations are the most widely used exploration techniques. However, borehole and geophysical data are often considered as separated information in existing studies. To this end, this paper presents a novel approach for characterizing stratigraphic uncertainty by merging borehole and geophysical data. In this approach, the probability distribution of geophysical parameter corresponding to a specified stratum can be derived based on both data collected at the same locations. Next, the probability of stratum existence can be estimated based upon geophysical data and the evaluated probability distribution of geophysical parameter. Then, potential stratigraphic realizations can be sampled systematically with the conditional random field theory, based upon borehole data and the estimated probability of stratum existence. Two illustrative examples with different stratigraphic structures are analyzed to demonstrate the effectiveness and versatility of the new approach. Further, a series of comparative analyses are performed to reveal the influences of types of site investigation data and their statistical error on site characterization quantitatively, through which the advantages of the fusion of borehole and geophysical data can be illustrated.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2421 - 2439"},"PeriodicalIF":5.6,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919156","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

Comparison of biomineralization kinetics induced by bacteria, bacterial enzyme, and soybean enzyme 细菌、细菌酶和大豆酶诱导生物矿化动力学的比较

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-01-27 DOI: 10.1007/s11440-024-02479-6

Guoliang Ma, Yang Xiao, Xiang He, Shifan Wu, Jian Chu

{"title":"Comparison of biomineralization kinetics induced by bacteria, bacterial enzyme, and soybean enzyme","authors":"Guoliang Ma, Yang Xiao, Xiang He, Shifan Wu, Jian Chu","doi":"10.1007/s11440-024-02479-6","DOIUrl":"10.1007/s11440-024-02479-6","url":null,"abstract":"<div><p>Bacteria (BS), bacterial enzymes (BE), and soybean enzymes (SE) have been used to induce CaCO<sub>3</sub> precipitation for soil stabilization. While the performance of these three urease sources has been widely studied, the underlying mechanisms have not been thoroughly explored. In this study, we conducted solution tests, followed by mathematical analysis, to investigate bacteria/enzyme degradation, urea hydrolysis rate, and CaCO<sub>3</sub> precipitation rate across different reaction phases. Microfluidics tests were also conducted to visually observe the precipitation process. Our results indicated that both urea hydrolysis and CaCO<sub>3</sub> precipitation intensified the degradation of the urease sources. Bacteria exhibited the most stable urease activity, followed by soybean enzymes, and then bacterial enzymes. The microfluidics tests revealed a lag period before CaCO<sub>3</sub> nucleation across all conditions, with the longest duration for BS, followed by SE, and then BE. Bacteria proved to be more effective urease producers, maintaining adequate urease levels without acting as heterogeneous nucleation sites. Additionally, SE contained significant impurities, which may contribute to the higher strength observed in SE-stabilized soil compared to BS-stabilized soil. The current work offers a fundamental approach for practical biocement grouting design through mathematic analysis and provides new insights into biocementation processes.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2185 - 2200"},"PeriodicalIF":5.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919071","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

Mechanical degradation and particle breakage of sandstone rockfill material under wetting–drying cycles 干湿循环作用下砂岩堆石料的力学降解与颗粒破碎

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-01-27 DOI: 10.1007/s11440-025-02545-7

Fengchun Yang, Hanlong Liu, Yang Xiao, Jinquan Shi, Yu Peng, Xuanming Ding, Xing Yang

{"title":"Mechanical degradation and particle breakage of sandstone rockfill material under wetting–drying cycles","authors":"Fengchun Yang, Hanlong Liu, Yang Xiao, Jinquan Shi, Yu Peng, Xuanming Ding, Xing Yang","doi":"10.1007/s11440-025-02545-7","DOIUrl":"10.1007/s11440-025-02545-7","url":null,"abstract":"<div><p>Wetting–drying cycle is a significant factor contributing to the deterioration of dam rockfills, leading to increased settlement and weakened stability of dams. Despite its importance, the impact of the wetting–drying cycle on the mechanical and particle breakage characteristics of continuously graded rockfill aggregates under a triaxial stress state remains unclear. This study conducted a series of large-scale triaxial drainage shear tests on sandstone rockfill materials from the Lianghekou rockfill dam in China under different wetting–drying cycle conditions. The results revealed that increased confining pressure exacerbates the wetting–drying degradation of peak strength and modulus. The wetting–drying cycle induced changes in drainage volume, with an increase during consolidation and a decrease during shear, alongside a notable rise in particle breakage and the proportion of grain groups below 0.5 mm. Subsequently, a hyperbolic crushing model considering wetting–drying cycle and plastic input work was proposed. Moreover, X-ray diffraction (XRD) and scanning electron microscopy (SEM) tests exhibit significant changes in mineral content and micromorphology. Finally, the discussion addressed how the mechanisms of the wetting–drying cycle impact the crushing degree and strength of samples. Four dominant deterioration mechanisms of the rockfill particles during wetting–drying cycle were revealed: mineral dissolution/flushed away, expansion pressure in microcracks induced by water-absorbing of clay minerals, crystallization pressure in microcracks after water loss of insoluble salts, the adsorption effect of clay minerals and stress due to inhomogeneous deformation between water-soaked regions and dry regions.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2237 - 2255"},"PeriodicalIF":5.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919310","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

Influence of loading conditions on mechanical behaviors of lunar regolith simulant WHU-1 based on Chang’e-5 returned samples 加载条件对“嫦娥五号”月壤模拟物WHU-1力学行为的影响

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-01-27 DOI: 10.1007/s11440-025-02553-7

Yue Teng, Shun Wang, Yifei Cui, Yong Pang

{"title":"Influence of loading conditions on mechanical behaviors of lunar regolith simulant WHU-1 based on Chang’e-5 returned samples","authors":"Yue Teng, Shun Wang, Yifei Cui, Yong Pang","doi":"10.1007/s11440-025-02553-7","DOIUrl":"10.1007/s11440-025-02553-7","url":null,"abstract":"<div><p>As lunar exploration and development missions advance, understanding the geomechanical properties of lunar regolith becomes essential for supporting future lunar engineering and in situ resource utilization. This study investigates the effects of loading conditions on the mechanical behavior of the lunar regolith simulant WHU-1, which was prepared based on particle size distribution data from samples returned by the Chang’e-5 mission. Key factors influencing the mechanical response of WHU-1, including confining medium, lateral constraint conditions, and ambient pressure, are analyzed through back pressure-controlled triaxial compression and direct shear tests. The results indicate that water pressure loading during triaxial tests leads to underestimated cohesion and overestimated internal friction angles compared to air pressure loading conditions. Decreasing ambient pressure alters the relationship between shear strength and radial stress from linear to quadratic. Radial stress and ambient pressure significantly affect the interactions among irregular particles, leading to the formation of various shear bands that influence post-peak failure behaviors. Direct shear tests exhibit a distinct nonlinear strength response with increasing load, whereas triaxial tests yield more consistent values for cohesion and internal friction angles under higher stress, attributed to differences in lateral confinement. Our study, combined with existing experimental results, suggests that the lunar soil returned by Chang’e-5 may exhibit higher shear strength compared to Apollo samples, likely due to its finer particle size distribution and more favorable grading characteristics.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2327 - 2344"},"PeriodicalIF":5.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919311","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

Study on bearing characteristic of long-short-pile composite foundation with biocemented coral sand pile 生物胶结珊瑚砂桩长-短桩复合地基承载特性研究

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2025-01-27 DOI: 10.1007/s11440-025-02552-8

Xiangwei Fang, Chunni Shen, Hanlong Liu, Chunyan Wang, Yuxi Guo, Peixi Xiong, Luqi Wang

{"title":"Study on bearing characteristic of long-short-pile composite foundation with biocemented coral sand pile","authors":"Xiangwei Fang, Chunni Shen, Hanlong Liu, Chunyan Wang, Yuxi Guo, Peixi Xiong, Luqi Wang","doi":"10.1007/s11440-025-02552-8","DOIUrl":"10.1007/s11440-025-02552-8","url":null,"abstract":"<div><p>Stabilizing coral sand foundations presents a considerable challenge in marine and island engineering due to its unique properties. To address the construction demands of \"green engineering, ecological islands\", this study introduced a novel foundation treatment technology known as the biocemented coral sand pile (BCS pile) composite foundation, which utilized microbially induced carbonate precipitation (MICP) technology as a sustainable alternative to traditional industrial cement. Considering that the combination of long and short piles represents the most economical structural configuration for multi-pile composite foundation, a series of model tests were conducted on the long-short BCS pile composite foundation. The results indicate that the long-short BCS pile composite foundations exhibited a significant improvement in bearing capacity compared to the untreated foundation, thereby validating the feasibility of employing biomineralization for foundation treatment. Additionally, the findings reveal that the load proportion carried by long BCS piles is greater than that of short BCS piles. Moreover, as the cushion layer thickness increased, a higher load proportion was supported by the surrounding sand, leading to a lower pile-soil stress ratio, a diminished load-sharing rate of the BCS piles, and a higher utilization coefficient of bearing capacity. This study demonstrates the potential usage of BCS pile composite foundation in coral sand sites, which is expected to provide valuable guidance for further research and practical applications.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 4","pages":"1947 - 1957"},"PeriodicalIF":5.6,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716652","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