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Grand Paris Express – Line 14

Grand Paris Express – Line 14

The Grand Paris Express is a major urban transport project taking place throughout the French capital. The project will add four new lines (lines 15, 16, 17, and 18) and extend two existing lines (11 and 14).

Dextra has been involved in several station packages through its local distributor partners. On line 14 in particular, Dextra supplied Fortec rebar couplers in the stations of Orsay and Pont Cardinet.

For Bagneux Station in the north of Paris, located at the intersection of metro line 4 and the future line 15, Dextra supplied its ASTEC Active Anchors.

ASTECアクティブアンカー are the preferred solution for subway station works as tunnel boring machines and earth-moving equipment can simply cut the FRP tendons of the anchors at any stage, eliminating the need for unreliable and costly anchor removal. The solution was approved for this project by the consulting firm SYSTRA.

Following numerous successful projects in the Middle East, this was the first time ASTECアクティブアンカー (a recent Dextra innovation) were installed in Europe.

ドーハ地下鉄 ムシェイレブ駅

ドーハ地下鉄 ムシェイレブ駅

ムシェイレブ駅はドーハ地下鉄の主要乗換駅です。ドーハのダウンタウンに位置し、3 つの路線 (レッド、グリーン、ゴールド) をすべて接続し、2022 FIFA ワールドカップ スタジアムのゲートウェイとなります。

ムシェイレブ駅は、規模的には世界最大の地下鉄駅の一つとなる。

ソフトアイズ for TBMs

For this major project, Dextra engineered and supplied between 2013 and 2015 8 large ASTEC GFRP Soft-Eyes, of a diameter of 8 meters each. Soft Eyes are cages of GFRP rebar, positioned into the D-Walls in-between steel segments. GFRP Soft-Eyes allow Tunnel Boring Machines (TBMs) to go through in a minimum time as the bars can be easily crushed by the tunnel machine.

タイバックアンカー

To anchor the massive d-walls and prevent any soil displacement during excavation works, Dextra also supplied its ASTECアクティブアンカー (AAA). Those innovative post-tensioned GFRP-based anchors, have the benefits of being cut by the Tunnel Boring Machines or standard excavation equipment. Because it can be easily cut, it doesn’t need to be removed from the ground, even when used for temporary applications.

ムシェイレブ ステーションの場合、D ウォールを固定するために、ソフトアイの中心に複数の腱アンカー (このプロジェクトではアンカーあたり 10 個) も設置されています。これらのアンカーもトンネルの突破時に切断されました(下のビデオで見ることができます)。合計 150 個のアンカーが駅に設置されました。