Wyniki wyszukiwania dla: soil improvement - MOST Wiedzy

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Wyniki wyszukiwania dla: soil improvement

Wyniki wyszukiwania dla: soil improvement

  • Dynamic soil improvement by hybrid technologies

    Publikacja

    - Rok 2015

    Hybrid method of subsoil improvement for road embankment foundation is described. This method is composed of two wellknown methods: dynamic replacement (DR) and microblasting (DDC) one (Deep Dynamic Compaction). The method was used for both the strengthening of the fully saturated organic subsoil as well as for acceleration of the consolidation of the organic layers. The practice ensures the expected results. A proper example on...

  • Soil improvement by short stone columns.

    Publikacja

    - Rok 2004

    W artykule przedstawiono sposób dogęszczania podłoża gruntowego wykorzystywany do renowacji istniejących nawierzchni placów składowych i dróg. Proponowany sposób polega na formowaniu w gruncie kolumny o niewielkiej średnicy. Kolumnę tą formuje się poprzez wbijanie w rozluźnione podłoże trzpienia stalowego, z jednoczesnym dosypywaniem gruntu.Sposób ten stosuje się przede wszystkim jako metodę wzmocnienia podłoża pod nawierzchniami...

  • Ground improvement with in situ Soil Mixing

    Publikacja

    - Rok 2005

    Omówiono metodę wzmacniania słabego gruntu za pomocą technologii wgłębnego mieszania na sucho i mokro. W metodzie mokrej stosuje się składniki wiążące (głownie cementy) wymieszane z wodą, podawane w formie zaczynu. W metodzie suchej materiały wiążące podawane są w postaci sproszkowanej z udziałem sprężonego powietrza. Przedstawiono główne obszary zastosowania w geotechnice oraz podano przykłady kilku realizacji.

  • Ground improvement with in-situ wet soil mixing

    Publikacja

    - Rok 2003

    Opisano rozwój technologii mieszania wgłębnego gruntu na świecie i w Polsce. Przedstawiono bliżej aktualnie wykorzystywane metody mieszania, wprowadzane przez specjalistyczne firmy. W syntetyczny sposób podsumowano zasady projektowania oraz doświadczenia wykonawcze. Zamieszczono bliższe informacje odnośnie kilku przykładów zastosowania w Polsce.

  • DredgDikes Dredged Materials in Dike Construction - Implementation in the SBR using Geosynthetics and Soil Improvement

    Projekty

    Kierownik projektu: prof. dr hab. inż. Zbigniew Sikora   Program finansujący: Europejska Wspólnota Terytorialna

    Projekt realizowany w Wydział Inżynierii Lądowej i Środowiska zgodnie z porozumieniem WTPB.02.01.00-56-012/10

  • Airstrip Ground Improvement Works by Blasting Charge Technique and Dredged-Ash Material Mixture

    Soil improvement by blasting charge technique is known in geotechnics as one of the efficient and inexpensive method. It can be used in preparing of underground to found road construction and buildings as well. The technique proves usefulness especially when dynamic load is applied. It is because of non-stiff or rather resilient type soil after improvement. In noncohesive or organic soil, blasting charge...

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  • Geotechnical characterization of soft soil deposits in Northern Poland

    This paper presents a geotechnical characterization of deltaic soft soil deposits in the Vistula Marshlands, northern Poland. It shows the limited applicability of organic soil classifications based on Cone Penetration Tests (CPTU) and Dilatometer Tests (DMT). None of the in-situ-based classifications correctly identifies peat. Analysis of the behaviour of contractive/dilative soil layers according to Robertson's updated classification...

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  • Application of soil nailing technique for protection and preservation historical buildings

    Soil nailing is one of the recent in situ techniques used for soil improvement and in stabilizing slopes. The process of soil nailing consists of reinforcing the natural ground with relatively small steel bars or metal rods, grouted in the pre-drilled holes. This method has a wide range of applications for stabilizing deep excavations and steep slopes. Soil nailing has recently become a very common method of slope stabilisation...

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  • Deep compaction control of sandy soils

    Vibroflotation, vibratory compaction, micro-blasting or heavy tamping are typical improvement methods for the cohesionless deposits of high thickness. The complex mechanism of deep soil compaction is related to void ratio decrease with grain rearrangements, lateral stress increase, prestressing effect of certain number of load cycles, water pressure dissipation, aging and other effects. Calibration chamber based interpretation...

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  • Study on some of the strength properties of soft clay stabilized with plastic waste strips

    It is well known that if plastic wastes are not well managed, it has a negative impact on the environment as well as on human health. In this study, recycling plastic waste in form of strips for stabilizing weak subgrade soil is proposed. For this purpose, a weak clay soil sample was mixed with 0.2%, 0.3%, and 0.4% of plastic strips by weight of soil, and the experimental results were compared to the control soil sample with 0%...

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  • Some geomechanical properties of a biopolymer treated medium sand

    Publikacja

    Some geomechanical properties of a biopolymer treated medium sand. This paper presents a laboratory assessment of geomechanical properties of sandy soil improved by biopolymer application. Additives (biosubstance) consist of polysaccharides and water. Biosubstance used in the project was xanthan gum, which comes from bacteria Xanthomonas campestris. Triaxial shear compression tests and unconfi ned compression tests were carried...

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  • Laboratory assessment of permeability of sand and biopolymer mixtures

    Laboratory assessment of permeability of sand and biopolymer mixtures. This research presents a method of creating seepage barriers in a sandy soil using biopolymer additives (biosubstance), which consist of polysaccharides and water. Polysaccharides strongly interact with water to produce a viscous suspension. The paper aims to investigate the infl uence of a biosubstance employed in a highly permeable sandy soil. Amount of the...

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  • Hydraulic conductivity of a biopolymer treated sand

    Publikacja

    - Rok 2015

    This paper presents results of laboratory assessment of creating seepage barriers in a sandy soil using biopolymer additives (bio substance), which consist of polysaccharides and water. Polysaccharides strongly interact with water to produce a viscous suspension. The aim of the conducted work was to investigate the influence of a biosubstance employed in a highly permeable sandy soil. The amount of the biopolymer used in a sample...

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  • Installation of CMC columns in overconsolidated clays

    Publikacja

    - Rok 2017

    During rigid inclusions execution in the subsoil some monitoring data are registered by a drilling rig for quality control. The use of these data can improve the design procedure of soil improvement as they can provide some information about the position of bearing strata and the energy necessary to install the column in the ground. In this paper the parameters registered in a drilling machine are described, the installation...

  • Detection of Toxoplasma gondii oocysts in environmental samples

    Publikacja

    - Rok 2012

    Toxoplasma gondii is an obligate intracellular parasite that has capacity to infect warm-blooded animals. Human toxoplasmosis is usually asymptomatic, whereas severe complications may occur in immunocompromised patients (e.g. AIDS) or in case of congenitalinfection. One of the sources of acquiring human toxoplasmosis is ingestion of T. gondii oocysts. It is known that newly infected cats can shed millions of oocysts into the environment,...

  • Pylon foundation of a cable stayed bridge at the motorway ring road of Wrocław

    The largest bridge of the motorway ring road of Wroclaw is a cable stayed bridge over the Odra river near Rędzin. Due to hydrogeological conditions of the ground it was not convenient to use standard bored piles of high length. Instead shorter piles were applied with additional improvement by cement injections at the pile toes. This decision was possible by extending ground investigation program and application of numerical modeling...

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  • The Analysis of Working Parameters Decrease in Photovoltaic Modules as a Result of Dust Deposition

    Publikacja

    The aspect of dust accumulation on the surface of photovoltaic (PV) modules should be thoroughly understood in order to minimize possible obstacles affecting energy generation. Several elements affect the amount of pollutant gathered on the surface of a solar device, mainly its localization, which is irreversibly linked to factors such as annual rainfall, occasional snow coverage, or, in a dry climate, increased blow of dust during...

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  • In situ soil mixing.

    Publikacja

    - Rok 2004

    Opracowanie stanowi 9-ty rozdział w książce ''Ground Improvement'' (Wzmacnianie gruntu).W podrozdziałach 9.1 i 9.2 przedstawiono rys historyczny oraz aktualny stan zaawansowania technologii mieszania gruntu na sucho i na mokro. Wprowadzono także klasyfikację metod wdrożonych na świecie przez firmy specjalistyczne. W podrozdziale 9.3 opisano sprzęt i technologię i przebieg mieszania, z podziałem na urządzenia do mieszania głębokiego...

  • Thermodynamic analysis of the Compressed Air Energy Storage system coupled with the Underground Thermal Energy Storage

    Publikacja

    - E3S Web of Conferences - Rok 2019

    Improvement of flexibility is one of the key challenges for the transformation of the Polish Power System aiming at a high share of renewable energy in electricity generation. Flexible and dispatchable power plants will contribute to this ongoing transformation process as they compensate for fluctuations in electricity generation from renewable energy sources such as wind and photovoltaics. In this context, CAES storage tanks are...

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  • Effect of MgSO4 nutrition on Theobroma cacao L. susceptibility to Phytophthora megakarya infection

    Publikacja
    • E. Minyaka
    • B. Madina
    • B. Kusznierewicz
    • O. Doungous
    • S. Haouni
    • J. Hawadak
    • N. Niemenak
    • D. N. Omokolo

    - PLANT PROTECTION SCIENCE - Rok 2018

    A new strategy to reduce the severity of black pod disease (BPD) in T. cacao plants using MgSO4 nutrition was investigated. The dynamics of the tolerance to BPD of 18 susceptible T. cacao plantlets coming from the cross (♀SNK64 × ♂UPA14) was monitored during weekly (8 weeks) supply of MgSO4 into the soil. Prior to MgSO4 application, disease scores of the 18 plantlets (in six sets of three plantlets per set) were varying between...

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  • Converting beach wrack into a resource as a challenge for the Baltic Sea (an overview)

    Publikacja
    • B. Chubarenko
    • J. Woelfel
    • J. Hofmann
    • S. Aldag
    • J. Bełdowski
    • J. Burlakovs
    • T. Garrels
    • J. Gorbunova
    • S. Guizani
    • A. Kupczyk... i 7 innych

    - OCEAN & COASTAL MANAGEMENT - Rok 2021

    The paper distinguishes beach wrack, the marine generated organic part of beach cast, as a separate management object and discusses research questions related to its management and economically viable use. Based on experiences from the Baltic Sea and existing practices from countries with different management systems clear distinction between the management of natural and anthropogenic components of cast material is seen as an...

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  • Environmental aspects of coastal earth structures made of soil-ash composites

    Publikacja

    This paper presents an innovative technology of building the coastal dams with the use of soil-ash composites. A natural- scale test stand and results of the performed environmental tests are presented ; they have been compared with standards for purity of soils and waters. Also, an analysis of the obtained results and discussion of trends and anomalies in the observations, are given.

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  • Pore Water Pressure Development in Soft Soil due to Installation and Loading of Controlled Modulus Columns

    Excess pore water pressure (EPWP) development and decay due to the installation and static loading tests of controlled modulus columns (CMC) in soft soil was measured with piezometers equipped with low air entry (LAE) filters and a piezocone (CPTU) equipped with a high air entry (HAE) filter. The HAE filter allows for detailed detection of EPWP in short time intervals during construction of CMC. The influence zone due to the installation...

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  • Blast Charge Technique as a Method of Soil Improving to Locate the New Supporting Runways

    A quick and effective method of reinforcing the ground base designed for the construction of engineering structures used for performing various types of air operations was presented. It allows to use wastelands, wetlands, swamps, etc. for these purposes, thus creating a dispersed network of landing sites, increasing the access of large social groups to air transport and increasing their mobility.

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  • Worku Firomsa Kabeta

    Osoby