Obalna konstrukcija veza 12 z zagatno steno : diplomska naloga

Frank, Doris (author), Logar, Janko (mentor), Može, Primož (comentor)

V Luki Koper se vse od leta 1970 obalne konstrukcije projektirajo kot armirano betonske plošče, temeljene na jeklenih pilotih s položno podmorsko brežino. Tak način gradnje zahteva izkop velike količine mulja slabih karakteristik, ki se v luki uporablja predvsem za pridobivanje novih površin. Načrpane količine mulja, tudi z naslova poglabljanja plovnih poti, so s časoma presegle potrebe. Razliko je zato potrebno odpeljati drugam, kar pa predstavlja za luko vse večji strošek. V diplomski nalogi je analizirana možnost uporabe jeklene zagatne stene na konkretnem primeru podaljška veza 11 v Luki Koper. Predlagana obalna konstrukcija je sestavljena iz betonske plošče na sistemu jeklenih cevnih pilotov v kombinaciji z zagatno steno. Slednja služi zadrževanje zemljine in ne zahteva dodatnega odvoza materiala. Ker gre za kompleksno konstrukcijo, so ustrezna geometrija in posamezni elementi dobljeni po korakih. Sprva je analizirala možnost uporabe betonske konstrukcije, ki povezuje elemente temeljenja, na koti terena. Zaradi slabo nosilnih temeljnih tleh, se je tak način gradnje izkazal za nemogočega. V naslednjih korakih je dokazana potreba po sidranju in uporabi razbremenilne ploščadi ter izvedbi, tako pilotov kot tudi obalne zagatne stene, v naklonu. Kot ustrezen se je izkazal model z betonsko ploščo 4 m pod terenom, naklonom zalednih pilotov 3:1 in stene 5,5:1 ter sidranjem s posebnimi Müller-Verfahren piloti. Prerezi ter dolžine pilotov in zagatnic so določeni z zahtevano nosilnostjo. Prikazan je tudi ugoden vpliv cementne stabilizacije morske gline pred steno in dodatnega globokega temeljenja skladiščnih površin na deformabilnost in obremenitev elementov. Na koncu so podana navodila za nadaljnjo kontrolo nosilnosti prečnih prerezov in stabilnosti cevnih pilotov ter kombinirane zagatne stene.

• Language: Slovenian
• Keywords: gradbeništvo, diplomska dela, UNI, obalne konstrukcije, zagatne stene, piloti, razbremenilne ploščadi, globoko temeljenje, Plaxis, SIST EN 1997-1
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: FGG - Faculty of Civil and Geodetic Engineering
• Place of publishing: Ljubljana
• Publisher: [D. Frank]
• Year: 2012
• Number of pages: XIII, 109 str.
• PID: 20.500.12556/RUL-32669
• UDC: 006.77:624.15(043.2)
• COBISS.SI-ID: 6060897
• Publication date in RUL: 10.07.2015

Secondary language

• Language: English
• Title: Quay wall for berth 12 in Port of Koper

Abstract

Since 1970 costal structures in the Port of Koper are designed as reinforced concrete slabs founded on vertical and inclined steel piles with a slope under the deck. This method of construction requires the excavation of large quantities of silt with bad characteristics, which is used mainly for acquiring new surfaces. The amount of pumped silt, derived from construction of new docks and deepening waterways, exceeds needs. Therefore it is necessary to take the extra silt elsewhere, which represents an increasing cost for the port. In the thesis is analyzed the possibility of using sheet pile wall on the particular case of the extension of dock number 11. The proposed coastal structure consists of concrete slab founded on steel tubular piles and steel sheet pile wall, which has a soil retaining and bearing function. This method of construction does not required addition excavations. Because of the complexity of the structure, individual elements and appropriate geometry models are acquired step by step. Initially the possibility of using a concrete slab on ground level founded on steel tubular piles and combined sheet pile wall that consist of different types of primary and secondary elements is analyzed. Because of the poor bearing capacity of the soil such type of structure is not an option. The following steps show the need of anchorage, inclination of piles and sheet wall and a relieving platform. Deep relieving platform 4 m below the ground anchored by Müller-Verfahren piles with inclined tubular piles at an gradient of 3:1 and sheet pile wall at a gradient of 5,5:1 is appropriate. Cross section and length of elements are set according to the required bearing capacity. The thesis also shows the positive effects of using deep mixing method and additional foundation of the storage area. At the end a list of further controls of cross sections and stability of steel elements is given.