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Foundation Treatment in Civil Engineering
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Foundation Treatment in Civil Engineering

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

Deadline for manuscript submissions: closed (31 August 2024) | Viewed by 5135

Special Issue Editors

Dr. You Wang

E-Mail Website
Guest Editor
School of Civil Engineering, Central South University, Changsha 410075, China
Interests: special soil subgrade treatment
Prof. Dr. Xiaobin Chen

E-Mail Website
Guest Editor
School of Civil Engineering, Central South University, Changsha ,China
Interests: coarse-grained granular soil; DEM numerical methods; soil dynamic

Special Issue Information

Dear Colleagues,

Improving the soil or rock properties that support buildings is an important issue for scientists and engineers.

The functional characteristics of soil or rock not only depend on the composition and structural form of the soil, but also on various treatment methods.

The purpose of modern foundation treatment is to improve technical equipment and process parameters, as well as the composition and structure of rock and soil, in order to achieve high bearing capacity, high water stability, low interface resistance, and many other characteristics.

This Special Issue will focus on new perspectives regarding engineering materials and technical measures to improve the chemical or functional properties of soil or rock.

The topics discussed in this Special Issue will not only focus on the further processing of modern methods, technologies, and materials, but also on the verification of their characteristics through various civil engineering practices.

Dr. You Wang
Prof. Dr. Xiaobin Chen
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 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

  • soft foundation treatment
  • bearing capacity and stability of rock and soil mass
  • foundation settlement deformation
  • dynamic characteristics of soil
  • engineering characteristics of special soil
  • technical measures for foundation treatment engineering
  • soil improvement materials

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Published Papers (3 papers)

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Research

18 pages, 8879 KiB  
Article
Introducing Cement-Enhanced Clay-Sand Columns under Footings Placed on Expansive Soils
by Abdullah A. Shaker and Muawia Dafalla
Appl. Sci. 2024, 14(18), 8152; https://doi.org/10.3390/app14188152 - 11 Sep 2024
Viewed by 1286
Abstract
The risk posed by expansive soils can be lessened by placing foundations at a more deep level below the surface. Structures are able to withstand uplift forces because overburden pressure partially suppresses swelling pressure. In order to transfer the forces to a sufficiently [...] Read more.
The risk posed by expansive soils can be lessened by placing foundations at a more deep level below the surface. Structures are able to withstand uplift forces because overburden pressure partially suppresses swelling pressure. In order to transfer the forces to a sufficiently deep depth, this study suggests introducing shafts of a low-expansion overburden material. Soil improved with cement is chosen for this purpose. This study suggests using sand with added excavated natural clay and cement. The expansive clay is added to sand in ratios of 10, 20, 30, 40 and 60%. The clay–sand mixture is then enhanced by cement of 1, 2, 4 and 8% by the weight of the mixture under four curing periods of 1, 7, 28, and 90 days. This material is recommended for use under lean concrete to transfer the loads to lower levels below the foundation depth. The thickness of this material depends on the stresses exerted, the type and the properties of the subsurface soils. The cement-enhanced clay–sand shaft’s properties are examined in this work with regard to the swelling potential, compressibility, and the unconfined compressive strength for different clay contents and curing conditions. Stiff shafts were formed and found to support stresses from 600 to 3500 kPa at cement additions in the range of 1% to 8%. Clay content above 30% is found to be not suitable for Al-Qatif clay due to the compressibility and low strength of the mixture. When two percent or more of cement is added, the swelling potential is significantly reduced. This is reliant on the pozzolanic interactions of soils and cement as well as the clay mineralogy. Determining how cement affects clay–sand combinations in regions with expansive soils would facilitate the introduction of a novel, inexpensive technology to support loads applied by the superstructure. Full article
(This article belongs to the Special Issue Foundation Treatment in Civil Engineering)
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13 pages, 4739 KiB  
Article
Construction Technology and Service Performance of Waterproof Curtain for Foundation Pit in Large-Particle Pebble Gravel Layer of Yangtze River Floodplain
by Wen Xu, Bo Liu and Jin Wu
Appl. Sci. 2024, 14(13), 5962; https://doi.org/10.3390/app14135962 - 8 Jul 2024
Viewed by 1099
Abstract
A foundation pit is constructed in the floodplain of Yangtze River, and a deep and thick layer of large-particle pebble gravel exists below the base slab, thus forming a connected supply channel with the adjacent Yangtze River. The large water volume, high water [...] Read more.
A foundation pit is constructed in the floodplain of Yangtze River, and a deep and thick layer of large-particle pebble gravel exists below the base slab, thus forming a connected supply channel with the adjacent Yangtze River. The large water volume, high water pressure, and strong permeability of this layer bring great risks to the foundation pit construction. In view of the fact that conventional waterproof curtain construction technologies such as the deep mixing column and high-pressure jet grouting column cannot meet the engineering requirements under these kinds of geological and environmental conditions, a new waterproof curtain construction technology that combines the trenching technology of the diaphragm wall with the TRD (Trench cutting Remixing Deep wall) technology is proposed, i.e., the trenching-and-replacing-style TRD technology, as well as the construction process of this technology, is presented. After the waterproof curtain is built using the proposed technology, the strength, integrity, uniformity, and service performance of the waterproof curtain wall are tested and evaluated by the comprehensive methods of coring, borehole television imaging, resistivity CT, and a group well pumping test. The results show that the proposed technology overcomes the adverse effects of underlying large-particle pebble gravel layer, and the waterproof curtain built by it effectively cuts off the hydraulic connection inside and outside the pit. The technical proposal can provide useful references for similar projects. Full article
(This article belongs to the Special Issue Foundation Treatment in Civil Engineering)
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17 pages, 9561 KiB  
Article
Mechanism and Application of Soilbags Filled with Excavated Soil in Soft Soil Subgrade Treatment
by Siyuan Xu, Jie Liao and Kewei Fan
Appl. Sci. 2024, 14(5), 1806; https://doi.org/10.3390/app14051806 - 22 Feb 2024
Cited by 2 | Viewed by 2147
Abstract
This research addresses the characteristics of soft soil subgrades treated by soilbags filled with excavated clayey soil. We evaluated of the strength and deformation modulus of soilbags containing excavated soil using unconfined compression tests. In addition, the drainage consolidation characteristics of soilbag-treated subgrades [...] Read more.
This research addresses the characteristics of soft soil subgrades treated by soilbags filled with excavated clayey soil. We evaluated of the strength and deformation modulus of soilbags containing excavated soil using unconfined compression tests. In addition, the drainage consolidation characteristics of soilbag-treated subgrades were investigated via model consolidation tests. Furthermore, a practical application included the construction of a 100 m-long rural road subgrade with these soilbags. The field test and numerical simulation results included the surface settlement and pore water pressure during and after construction to validate the effectiveness of the soilbag treatment for soft soil subgrade. The results show that the soilbags significantly enhanced both the strength and deformation modulus of the soft soil, which met the design requirements after the soilbag treatment. The drainage attributes of the soilbag treatment were also found to support the consolidation process of the soft soil subgrade effectively. Notably, the pore water pressure diminished rapidly during the construction interval, which is beneficial to reducing the post-construction settlement. The settlement uniformity of the subgrade is good verification of the superiority of the soilbag-treated subgrades. Full article
(This article belongs to the Special Issue Foundation Treatment in Civil Engineering)
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