نتایج جستجو برای: Micropiles

تعداد نتایج: 58  

2007
Kyle Kershaw

Micropiles are routinely used in the United States for foundation support and stabilization of slopes. In recent years, several retaining walls have been constructed using micropiles in an A-frame type configuration to support temporary and permanent excavations at sites with limited access and limited right-of-way. Typical A-frame micropile walls consist of a row of vertical micropiles at the ...

2016
José Marcos Ortega Álvarez María Dolores Esteban Pérez Raúl Rubén Rodríguez Escribano José Luís Pastor Navarro Isidro Sánchez Martín

Nowadays, the use of micropiles has undergone a great development. In general, they are made with cement grout, reinforced with steel tubing. In Spain, these grouts are prepared using OPC, although the standards do not forbid the use of other cements, like sustainable ones. Micropiles are in contact with soils and groundwater, in which the presence of sulphates is common. Their deleterious effe...

2017
José Marcos Ortega María Dolores Esteban Raúl Rubén Rodríguez José Luis Pastor Francisco José Ibanco Isidro Sánchez Miguel Ángel Climent

At present, sustainability is of major importance in the cement industry, and the use of additions such as silica fume as clinker replacement contributes towards that goal. Special foundations, and particularly micropiles, are one of the most suitable areas for the use of sustainable cements. The aim of this research is to analyse the effects in the very long-term (for 600 days) produced by sul...

2017
José Marcos Ortega María Dolores Esteban Raúl Rubén Rodríguez José Luis Pastor Francisco José Ibanco Isidro Sánchez Miguel Ángel Climent

Nowadays, one of the most popular ways to get a more sustainable cement industry is using additions as cement replacement. However, there are many civil engineering applications in which the use of sustainable cements is not extended yet, such as special foundations, and particularly micropiles, even though the standards do not restrict the cement type to use. These elements are frequently expo...

Journal: :Applied sciences 2023

Micropiles are small-diameter foundation elements that widely used in building refurbishment to reinforce existing foundations or provide new where access for construction is difficult. Thermally-activated (TA) micropiles could be useful as an efficient means of providing cost-effective ground-coupling when shallow geothermal energy systems considered rehabilitation. It well-established thermal...

This paper investigates the effect of micropile installation into saturated sandy soil by means of finite element method. The obtained results from numerical modeling are compared with the received data from the site. The validation of software has been done by simulating standard penetration test. The effect of some changes in spacing (3m, 1.6m and 0.8m) and injection pressure (1cm, 2.5cm, 5cm...

Journal: :journal of rehabilitation in civil engineering 2013
m. esmaeili m. gharouni nik f. khayyer

construction of railway embankments on loose beds without using any methods of soil improvement (e.g. stone columns in silt and clay beds, deep soil mixing method, jet grouting and also using micropiles individually or in groups form) leads to  reduction of embankment slope gradient, which significantly increases the volume of soil operation. generally, micropile as a reinforcing element with t...

Journal: : 2022

Reconstruction and building extensions have become popular trends, even being recognized as one of the most appropriate options for homes, especially in high population density areas or crowded cities. Due to changes size buildings (by applying additional loads), existing foundations themselves are incapable resisting extra stresses. Therefore, it is imperative increase bearing capacity well ov...

F. Khayyer, M. Esmaeili M. Gharouni Nik

Construction of railway embankments on loose beds without using any methods of soil improvement (e.g. stone columns in silt and clay beds, deep soil mixing method, jet grouting and also using micropiles individually or in groups form) leads to  reduction of embankment slope gradient, which significantly increases the volume of soil operation. Generally, micropile as a reinforcing element with t...

Journal: :Geotechnique Letters 2021

Micropiles (MP) are widely used for underpinning existing buildings that being vertically extended. They can be preloaded after installation, whereby partial loads transferred from existing...

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