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Soil Improvement and Foundation Engineering
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Soil Improvement and Foundation Engineering

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: 30 November 2026 | Viewed by 1226

Special Issue Editors

Dr. Hongjie Lin

E-Mail Website
Guest Editor
School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China
Interests: soil improvement and reinforcement
Dr. Dan Chang

E-Mail Website
Guest Editor
School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China
Interests: strength characteristics and constitutive models of geotechnical materials; mechanical properties of subgrade fill materials

Special Issue Information

Dear Colleagues,

This Special Issue explores cutting-edge advancements and interdisciplinary solutions in relation to soil improvement and foundation engineering, addressing global challenges like unstable terrains, climate resilience, and sustainable urbanization. We warmly invite you to contribute to this Special Issue. This Special Issue seeks to unite research in geotechnical engineering, environmental science, and materials innovation—highlighting sustainable soil stabilization, intelligent monitoring systems, and related case studies. Your expertise will advance our mission to build safer, greener infrastructure. We encourage submissions offering technical feasibility validation, lifecycle cost analysis, or scalable field applications. Thank you!

Dr. Hongjie Lin
Dr. Dan Chang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 250 words) can be sent to the Editorial Office for assessment.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • soil improvement
  • special soil mechanics
  • foundations
  • hydromechanical properties of soils

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Published Papers (2 papers)

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Research

19 pages, 2080 KB  
Article
Evaluation of Low-Carbon Grouting Material on Pipe Roof Support in Shallow Unsymmetrical Loading Tunnels Based on the Pasternak Foundation Theory
by Jingsong Chen, Mu He, Xiaodong Li, Zhenghao Xu and Hongwei Yang
Appl. Sci. 2026, 16(8), 3863; https://doi.org/10.3390/app16083863 - 16 Apr 2026
Viewed by 267
Abstract
Traditional pipe roof support design methods generally assume horizontal ground conditions and treat the pipe roof as a monolithic beam, thereby neglecting the differential stress distribution among individual steel pipes under unsymmetrical loading. To address this gap, this paper presents two main contributions: [...] Read more.
Traditional pipe roof support design methods generally assume horizontal ground conditions and treat the pipe roof as a monolithic beam, thereby neglecting the differential stress distribution among individual steel pipes under unsymmetrical loading. To address this gap, this paper presents two main contributions: a low-carbon cement-based grouting material suitable for pipe roof reinforcement, and a new mechanical model that simultaneously accounts for biased pressure conditions and the inter-pipe micro-arch effect. First, the working performance of limestone calcined clay cement (LC3) grout was systematically tested at a water–cement ratio of 1:1, and the optimal mix ratio was determined. Grout–soil reinforcement tests on weathered granite show that, for grout-to-soil volume ratios between 0.2 and 0.8, the compressive strength of the reinforced material exceeds 10 MPa and the elastic modulus exceeds 600 MPa. Second, a mechanical model for the pipe roof was established based on the Pasternak two-parameter foundation theory, incorporating both biased pressure conditions and the inter-pipe micro-arch effect. The model predictions were compared with existing field monitoring data in the literature, showing consistent trends and good agreement in peak deflection values. Parametric analysis reveals that under horizontal ground conditions, the pipe roof response is symmetric, with the vault as the most critical area. As the bias angle increases, the maximum response shifts toward the higher side of the terrain, and the stress difference between pipes on both sides increases significantly. Theoretical analysis of the low-carbon grouting material shows that pipe roof deflection is moderately reduced compared to traditional grouting materials, but at the cost of increasing bending moment and shear force within the steel pipes. The proposed low-carbon grouting material and the validated mechanical model provide theoretical support for the design optimization of pipe roof support in shallow unsymmetrical loading tunnels. Full article
(This article belongs to the Special Issue Soil Improvement and Foundation Engineering)
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21 pages, 4523 KB  
Article
Effects of Static and Dynamic Loads on Frost Heave Deformation of Coarse-Grained Subgrade Soil in Cold Regions
by Yangyang Xie, Gang Song, Qiang Li and Qingzhi Wang
Appl. Sci. 2025, 15(23), 12748; https://doi.org/10.3390/app152312748 - 2 Dec 2025
Viewed by 491
Abstract
With the rapid development of high-speed and heavy-haul railways in cold regions, understanding the influence of external loads on the frost heave behavior of subgrade fillings is of great importance. In this study, one-dimensional frost heave experiments were conducted on Group A coarse-grained [...] Read more.
With the rapid development of high-speed and heavy-haul railways in cold regions, understanding the influence of external loads on the frost heave behavior of subgrade fillings is of great importance. In this study, one-dimensional frost heave experiments were conducted on Group A coarse-grained soil under different static and dynamic loading conditions. The effects of upper plate freezing temperature, load magnitude, load frequency, and water supply (closed and open systems) were systematically investigated. The variations in internal temperature, frozen depth, frost-heave deformation, and post-freezing water content distribution were analyzed. The results indicate that external loads exert a certain inhibitory effect on frost-heave deformation of coarse-grained soil. Upper plate freezing temperature and load magnitude were identified as key factors influencing frost heave behavior, while load frequency had little effect. With decreasing upper plate freezing temperature, both frozen depth and frost-heave deformation increased. The frost heave ratio decreased with increasing load magnitude. Compared with fine-grained soil, coarse-grained soil exhibited shorter frost heave growth periods (about 3–5 h) and less pronounced ice lens formation. In addition, the water content in the frozen portion increased slightly, while that in the unfrozen portion decreased. These findings provide valuable insights for evaluating the stability of railway subgrades and optimizing design parameters in cold-region engineering. Full article
(This article belongs to the Special Issue Soil Improvement and Foundation Engineering)
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