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Author:Ihalainen, Petri
Title:Paalutettu Kopler-teräsverkkopenger
Piled Kopler-steelgrid embankment
Publication type:Master's thesis
Publication year:2009
Pages:151 s. + liitt. 33      Language:   fin
Department/School:Rakenne- ja rakennustuotantotekniikan laitos
Main subject:Pohjarakennus ja maamekaniikka   (Rak-50)
Supervisor:Vepsäläinen, Pauli
Instructor:Forsman, Juha
Electronic version URL: http://urn.fi/URN:NBN:fi:aalto-201802231589
OEVS:
Electronic archive copy is available via Aalto Thesis Database.
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Location:P1 Ark Aalto     | Archive
Keywords:soil reinforcement
steelgrid
piled plate
experimental construction
pohjanvahvistus
teräsverkko
paalulaatta
koerakentaminen
Abstract (eng):The piled steelgrid embankment is best suited for soil reinforcement of consolidating yards, where we can get the most use of its competitivity. Yards that consolidate are a national and an economical problem. Soil settlement generates large additions to use and repair costs. Well made surface strutures are ruined if the soil consolidates. There is a need for developing new soil construction methods. The soil reinforcement of large yards is quite expensive so more and more attention will progressively be used for soil construction in the near future. In Finland, Steelgrids are being used under highways to equalize soil consolidations, but they haven´t been directly used as a georeinforcement with the piled embankment. In this master´s thesis we analyse the use of steelgrid as a soil reinforcement method for a piled embankment. The thesis includes the steps of development, the measurement of the reinforcement method, the risk control of the method and the analysis of the experimental structure. The experimental structure that was built in association with the thesis is located in Vanttila, Espoo and it is used as a parking area for a local school. The structure was instrumentated and these results are analysed in this thesis. We found out that the structure is working mechanically. Advantages for this method are a short building time and low consolidation. Disadvantages should include poor repairbility under the steelgrid. The optimization of the method is not finished.
Abstract (fin):Paalutettu teräsverkkopenger soveltuu parhaiten painuvien pihojen pohjanvahvistukseen, jossa sen kilpailukyvystä saadaan irti suurin hyöty. Painuvat pihat ovat kansantaloudellinen ongelma Suomessa. Maapohjan painuminen aiheuttaa suuria lisäyksiä käyttö- ja korjauskustannuksiin. Hyvin tehdyt pintarakenteet menevät aina piloille, jos pohjamaa painuu. Pihojen pohjanvahvistaminen nykyisillä menetelmillä on suhteellisen kallista, joten pihojen pohjarakentamiseen tullaan lähitulevaisuudessa kiinnittämään etenevästi huomiota. Teräsverkkoja käytetään Suomessa usein väylien alla tasaamassa painumia, mutta teräsverkkoja ei ole suoranaisesti aiemmin käytetty paalutetun penkereen yhteydessä geovahvisteena.

Tässä diplomityössä käsitellään teräsverkkojen käyttöä paalutetun penkereen pohjanvahvisteena. Työ sisältää Tammet Oy:n kehityshankkeen vaiheet, pohjanvahvistusmenetelmän mitoituksen, menetelmän riskienhallinnan sekä koerakenteen analyysin. Diplomityön yhteydessä rakennettu koerakenne sijoittui Espoon Vanttilaan koulun parkkialueen pohjanvahvistukseksi. Koerakenne instrumentoitiin ja instrumentointituloksia analysoidaan tässä työssä. Koerakentamisesta selvisi, että menetelmän toimivuus mekaanisesti on hyvä. Menetelmän etuina voisi pitää lyhyttä rakennusaikaa ja pieniä painumia. Haasteena on verkkojen kunnallistekniikan yms. yhdistäminen. Rakenteen optimointi on vielä kesken.
ED:2009-05-04
INSSI record number: 37352
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