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Applied Sciences
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Geo-Environmental Problems Caused by Underground Construction, 2nd Edition
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Geo-Environmental Problems Caused by Underground Construction, 2nd Edition

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

Deadline for manuscript submissions: 20 June 2024 | Viewed by 2377

Special Issue Editor

Prof. Dr. Bing Bai

E-Mail Website
Guest Editor
School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Interests: soft soil foundation treatment; geo-environmental engineering; engineering construction in special soil; energy underground structure construction; disposal and construction of contaminated sites; thermo-hydro-mechnical processes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Geo-environmental disturbance refers to significant changes in the physical, mechanical, and chemical properties of soils that are closely tied to interrelated multi-physical field coupling systems of solid particles, water, and gas in the shallow stratum, which are caused by underground engineering construction. In fact, the evaluation of possible geo-environmental hazards is an important topic worthy of the attention of researchers and engineers working in the construction of large-scale underground engineering. This is related to the suitability of civil engineering construction, especially for some complicated geological conditions such as saturated super-soft soil, laterite, loess, sand gravel stratum, saline soil, frozen soil, and karst stratum with rich water.

In recent years, an increasing number of geo-environmental problems have attracted many scholars and engineers, promoting the development of geotechnical engineering and its close intersection with other disciplines. These concerns include the settlement of ground surfaces, the collapse of underground supporting structures, landslides of soil slope, debris flows, the protrusion and blockage of tunnels, etc. For this purpose, it is necessary to investigate the micro-structures, physicomechanical properties, deformation and strength evolution, and seepage characteristics of various geotechnical media.

This Special Issue titled “Geo-Environmental Problems Caused by Underground Construction” will address the most recent developments in the interaction between coupled multi-physical fields and underground structures, as well as geo-environmental effects, to stimulate fruitful technical and scientific interaction between professionals.

Potential topics include, but are not limited to, the following:

  • Disturbance effect of underground construction;
  • Geo-environmental problems in special soils;
  • Landslides under long-term groundwater action;
  • Risk assessment and decision in underground construction;
  • Coupled thermo-hydro-mechanical constitutive models;
  • Environmental influence of energy pile construction;
  • Seepage and prevention under multi-field coupling;
  • Environmental effect of geothermal utilization;
  • Geo-environmental geotechnics.

Prof. Dr. Bing Bai
Guest Editor

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 100 words) can be sent to the Editorial Office for announcement on this website.

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

  • disturbance effect of underground construction
  • geo-environmental problems in special soils
  • landslides under long-term groundwater action
  • risk assessment and decision in underground construction
  • coupled thermo-hydro-mechanical constitutive models
  • environmental influence of energy pile construction
  • seepage and prevention under multi-field coupling
  • environmental effect of geothermal utilization
  • geo-environmental geotechnics

Published Papers (3 papers)

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15 pages, 5683 KiB  
Article
Variability in Mechanical Properties and Cracking Behavior of Frozen Sandstone Containing En Echelon Flaws under Compression
by Weimin Liu, Li Han, Di Wu, Hailiang Jia and Liyun Tang
Appl. Sci. 2024, 14(8), 3427; https://doi.org/10.3390/app14083427 - 18 Apr 2024
Viewed by 332
Abstract
The mechanical properties of frozen fissured rock masses are crucial considerations for engineering in frozen earth. However, there has been little research on the mechanical properties of frozen fissured sandstone, including its strength, deformation, and geometric parameters. In this study, sandstone samples with [...] Read more.
The mechanical properties of frozen fissured rock masses are crucial considerations for engineering in frozen earth. However, there has been little research on the mechanical properties of frozen fissured sandstone, including its strength, deformation, and geometric parameters. In this study, sandstone samples with three open en echelon fissures were observed using high-speed photography and acoustic emissions during uniaxial compression tests. The aim was to investigate sandstone’s strength, deformability, and failure process in order to elucidate the effects of freezing on its mechanical properties. In the frozen-saturated and dried states, the uniaxial compression strength (UCS) initially decreases and then increases with an increase in fissure inclination angle. Conversely, the UCS of samples in the saturated state continuously increases. The UCS follows a decreasing trend, as follows: frozen-saturated state > dried state > saturated state. The initial crack angle decreases as the fissure inclination increases in all states, irrespective of temperature and moisture conditions. However, the initial crack stress and time show an increasing trend. The uniaxial compression strength (UCS) of frozen fissured sandstone is influenced by four mechanisms: (1) ice provides support to the rock under compression, (2) ice fills microcracks, (3) unfrozen water films act as a cementing agent under tension or shearing loads, and (4) frost damage leads to softening of the rock. Full article
(This article belongs to the Special Issue Geo-Environmental Problems Caused by Underground Construction, 2nd Edition)
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17 pages, 5936 KiB  
Article
Study on the Factors Affecting the Performance of a Pressure Filtration–Flocculation–Solidification Combined Method for Mud Slurry Treatment
by Chao Han, Hongping Xie, Bin Bai, Dongrui Liu, Yue Huang and Rongjun Zhang
Appl. Sci. 2023, 13(20), 11299; https://doi.org/10.3390/app132011299 - 14 Oct 2023
Viewed by 852
Abstract
A pressure filtration–flocculation–solidification combined treatment possesses great potential for the reutilization of the waste mud slurry generated from diverse construction projects as filling material due to its versatility and high efficiency. However, very limited existing studies have focused on the factors affecting pressure [...] Read more.
A pressure filtration–flocculation–solidification combined treatment possesses great potential for the reutilization of the waste mud slurry generated from diverse construction projects as filling material due to its versatility and high efficiency. However, very limited existing studies have focused on the factors affecting pressure filtration’s efficiency. In this paper, a calculation model for compression filtration is established based on laboratory pressure filtration model tests and one-dimensional large-strain consolidation theory. The influence of various parameters on pressure filtration’s efficiency is analyzed, and favorable values for these parameters are recommended. The results show that an increased initial mud cake thickness significantly increases the dewatering time and reduces the treatment’s efficiency. A lower dewatering time and higher efficiency can be achieved by increasing the filtration pressure, but the efficiency improvements become limited after reaching the critical pressure threshold. For the mud slurry used in this study, the optimal values for the initial mud slurry bag thickness, filtration pressure, and dewatering time are 240 mm, 1.0 MPa, and 30 min, respectively, yielding a final mud cake water content of 58.7% after filtration. Full article
(This article belongs to the Special Issue Geo-Environmental Problems Caused by Underground Construction, 2nd Edition)
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13 pages, 6726 KiB  
Article
Experimental PIV Radial Splitting Study on Expansive Soil during the Drying Process
by Shun Yu, Fangchan He and Junran Zhang
Appl. Sci. 2023, 13(14), 8050; https://doi.org/10.3390/app13148050 - 10 Jul 2023
Cited by 4 | Viewed by 775
Abstract
Expansive soil is prone to shrinkage and cracking during the drying process, leading to strength and permeability problems that exist widely in water conservancy projects and geotechnical engineering, including foundation pits and cracks at the bottom of channels and slopes. Such problems are [...] Read more.
Expansive soil is prone to shrinkage and cracking during the drying process, leading to strength and permeability problems that exist widely in water conservancy projects and geotechnical engineering, including foundation pits and cracks at the bottom of channels and slopes. Such problems are closely related to the tensile strength of the soil. In this study, Nanyang expansive soil is taken as the research object and radial splitting tests were performed using a particle image velocimetry (PIV) test system on both undisturbed and remolded expansive soil during the drying process. The results indicated that the load–displacement curve of the undisturbed and remolded expansive soil specimens showed a strain-softening phenomenon and that the peak load increased with decreasing water content. Under the same other conditions, the peak load of the remolded expansive soil specimen was higher than that of the undisturbed soil specimen, with the undisturbed soil specimen having distinctive structural and fractural features. The load–displacement relation curve, displacement vector field, and fracture characteristics had an obvious one-to-one correspondence in the stage division. The compression deformation stage, crack development stage after the peak value, crack maturity stage, and failure stage could be observed via the PIV technique. Moreover, the fracture characteristics of the remolded specimens were more regular than those of the undisturbed specimens. The above research results provide a scientific basis for the design and construction of geotechnical engineering related to expansive soil. Full article
(This article belongs to the Special Issue Geo-Environmental Problems Caused by Underground Construction, 2nd Edition)
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