Role to Be Played by Independent Geotechnical Supervision in the Foundation for Bridge Construction

Sobala, D.; Rybak, Jarosław

doi:10.1088/1757-899x/245/2/022073

Cited by 22 publications

(17 citation statements)

References 9 publications

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“…To sum up, increase of binder content leads to better soil-cement properties; however it should be born in mind that such material has very random properties dependent on many factors. Hence, economic application of DSM Dry technology may require detailed testing and supervision for each one project under design [16][17][18]. The above analysis was aimed at determining of cement-soil properties.…”

Section: Discussionmentioning

confidence: 99%

Preliminary results of dry Deep Soil Mixing soil-cement composite testing

2018

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This paper provides results of testing made for soil-cement mixtures in dry mixing technology. This technology is greatly dependent on existing soil condition; hence the results are of highly random nature. Material used in testing was distinguished with high organic content and low humidity. Tests were carried out in laboratory of Wroclaw University of Technology on 145 samples as ordered by Menard Polska Ltd. Company. Samples were prepared and stored under laboratory conditions and then, after various maturation time, were destroyed in a testing machine. The purpose was to determine the stress-strain curves used to find strength properties, strain at failure, modulus of elasticity, secondary modulus of elasticity versus cement content. Test confirmed improvement of soil strength properties after addition of cement binder. The results may be used to determine the most economic binder-to-soil ratio.

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Section: Discussionmentioning

confidence: 99%

Preliminary results of dry Deep Soil Mixing soil-cement composite testing

2018

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Section: Historical Earthwork Principlesmentioning

confidence: 99%

“…Terzaghi's work initiated a period of rapid and comprehensive development of soil mechanics. Methods of calculating the stability of the earth slopes were published much later [29], and they require the determination of the types and parameters of the soil as well as geotechnical supervision [30]. Calculations of soil pressure for retaining structures and structures embedded in the ground were presented by Rankine [31], who considered the equilibrium of a soil element at any depth in the backfill behind a retaining wall and determined the active earth pressure.…”

Section: Historical Earthwork Principlesmentioning

confidence: 99%

The Historical Earthworks of the Warsaw Citadel

2020

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In this study, we analyzed the methods and technologies used for constructing earthworks and military engineering in the latter period before the industrial revolution in Poland. The research object, the Warsaw Citadel, is a source of knowledge about military heritage from the aspect of conservation and protection of specific engineering achievements, which were dictated by early Russian geopolitical doctrine. Within the framework of the ongoing project of material heritage protection and popularization of history, the fortress has been transformed into a modern museum building. The new symbolic message of architecture was redefined, leaving behind the gloomy dominance elements in the scenery of the nearby city. In this study, reception tests of ground anchors were used for analysis. They were treated as a tool to determine the heterogeneity of fortification of historical earthworks. In the presented calculation procedure, limitations in the availability of geotechnical tests were overcome. Geological terrain layout and embankment excavation technology significantly impacted their quality and reliability. Currently, the embankments are slashed with anchored retaining walls. Ground anchors were used at short distances and were tested according to the national standard procedures. The results of the load tests are based on the physical properties of the subsoil, the conditions of contact with the supporting elements of the anchors, and the material properties. The soil interaction with the anchors is described using a rheological model, the constants of which were obtained using a fractional derivative model. The spatial variability of the rheological model parameters is presented using theoretical semivariograms matching the empirical data. The semivariograms explain the spatial correlation of the tested constants of the rheological model of the substrate with the anchors. The results of non-destructive testing were influenced by factors such as time and consolidation processes. The obtained results allowed us to directly draw conclusions about the repetitiveness of embankment features and indirectly about the quality of their construction.

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“…The possible methods for controlling the quality of the soil-cement material are presented in [7]. General remarks regarding geotechnical projects and supervision over them are contained in the work [8]. This paper presents the method of dry mass stabilization in organic soils, such as peats.…”

Section: Basics Of Deep Soil Mixing (Dsm) Technologymentioning

confidence: 99%

Mass Stabilization as reinforcement of organic soils

Nowak

Kanty

2019

E3S Web Conf.

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The decreasing number of places suitable for constructing buildings forces people to creatively develop newer methods of soil reinforcement. One of these methods is the deep soil mixing. This technology has been firstly developed and applied in Japan in the 1970s. Initially, it was used to create DSM (Deep Soil Mixing) columns. In the subsequent years, it was also developed in Scandinavia. Over time, the deep mixing technology was modified and developed, and in addition to the wet method, also the dry method was started to be used, while in addition to the cement binder, also lime binders and fly ashes were used. Technologies consisting of the deep mixing of cement with soil are very popular due to the wide range of applications and relatively low implementation costs. The method of Mass Stabilization (MS) is a soil reinforcement method that is analogical to DSM and it consists of mixing large volumes of soil with cement. This article describes the method of dry Mass Stabilization of organic soils. It cites the analyzed laboratory tests of soil-cement material manufactured in MS technology. The tests included the creation of 140 material samples, and subsequently the performance of compression strength test on them, along with the registration of stress path. The main aspect of these tests consisted of increase in the primary deformation modulus over time, depending on the amount of applied cement. Also, an example of the project to strengthen the layer of aggregate mud under the floor in the hall is demonstrated. The reinforcement was implemented in the MS technology.

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Role to Be Played by Independent Geotechnical Supervision in the Foundation for Bridge Construction

Cited by 22 publications

References 9 publications

Preliminary results of dry Deep Soil Mixing soil-cement composite testing

Preliminary results of dry Deep Soil Mixing soil-cement composite testing

The Historical Earthworks of the Warsaw Citadel

Mass Stabilization as reinforcement of organic soils

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