Dvojosé geomreže

Úsek diaľnice D1 Hričovské Podhradie – Lietavská Lúčka má dĺžku 11,3 km a spolu s nadväzujúcou stavbou D1 Lietavská Lúčka – Višňové – Dubná Skala bude tvoriť južný obchvat mesta Žilina. V predmetnom úseku diaľnice sa navrhlo niekoľko typov úprav podložia násypov, ktorých cieľom je zabezpečiť dostatočnú únosnosť na vybudovanie násypov a vytvoriť podmienky na urýchlenú konsolidáciu podložia. Násypové teleso s maximálnou výškou 8,5 m je zrealizované na diaľnici D1 Hričovské Podhradie – Lietavská Lúčka v km 32,550 – 33,400 na neúnosnom podloží tvorenom nasýtenými fluviálnymi ílmi. Zemina v podloží násypu mala extrémne nízke hodnoty deformačných a šmykových vlastností. Vzhľadom na výšku násypového telesa a mocnosť nasýtených ílovitých a piesčitých vrstiev (4,0 – 6,0 m) bolo potrebné zrealizovať vertikálne konsolidačné drény a na udržanie celkovej stability budovaného násypového telesa bola navrhnutá skladba výstužnej geodosky.

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The Gadarwara railway station is approx. 20 km from NTPC site. NTPC constructed the Gadarwara railway siding line for transporting coal to their plant. For this railway siding work, the blanket (subballast) material was not available in the Gadrwara area and transportation of blanket material from outside area was not an economical option. This devoid of blanket material was major concern of project. Also, mining has been banned in our country due to environmental issues, so it had become difficult to get quantity for blanket for formation construction. Apart from unavailability of blanketing material, another concern of this project was the inadequacy of good subgrade material. The subgrade material was of SQ1 type which had fines content of more than 50%. Considering these aspects of project, biaxial extruded polypropylene geogrid MacGrid EG and non-woven geotextile solution MacTex N was proposed for strengthening the formation.

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The RN4 is one of the major routes in Burkina Faso that connects the capital and largest city of the country, Ouagadougou, to the eastern cities such as Koupela. Within Ouagadougou, the urban section of this national road passes through Komber-Pandema Avenue at the East interchange and traverses wetlands that border the lakes and ponds of the city. As part of the rehabilitation of this wet stretch, the company COGEB International aimed to strengthen the roadbed foundation layer to cope with potential hydraulic pressures and the wet-dry cycles associated with the rainy and dry seasons.

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