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ナグプール地下鉄、リーチ-1 (1 号線)

ナグプール地下鉄、リーチ-1 (1 号線)

Nagpur, the second capital of Maharashtra and one of the fastest developing city in India is witnessing major growth in terms of Infrastructure. The development encompasses primarily the connectivity, of which Metro rail becomes a major part.

Incepted in 2016, the metro project is being a subject of acclaimed discussion for its speed of execution and the quality of construction.

Within the city boundaries, it requires the highest standards of safety considerations including the seismic analysis of structure in service life.

Project Requirement

The fast track project has typical structure for its Line 1 alignment, where the viaducts are supporting 2 levels of pathways, lower one for NH-7 and upper one for the metro rail. As the impact loading is a big concern due to train movement.
Being the stretch of always busy traffic, a solution was required which does not have to revise the existing design. Plus a major concern was the impact on speed of the otherwise fast moving project. The issue was concerning to all the stakeholders especially the GC for the project, who were looking to maintain the agility as well as find a sustainable solution.

Solution

Dextra Introduced Shear Key Bars for the priority section allowing the structure to neutralize the seismic forces. This not only helped the contractor to get the work done faster, but also enabled the client to go for the trial run earlier than expected.

ドーハ地下鉄、ゴールドライン – Al Sadd C-Ring駅

ドーハ地下鉄、ゴールドライン – Al Sadd C-Ring駅

The Doha Metro is a rapid transportation system, designed as an integral component to the larger Qatar rail network. This country wide mega-scale infrastructural project consists of 300km of rail and 100 stations. The rail network to reduce traffic congestion, and to connect the people of Qatar with the rest of the GCC region. At the city scale, currently under construction, the metro is projected to be operational by the end of 2019. It will serve Doha and its surrounding suburbs with stations located in all major nodes of the metropolis. Doha Metro will be operating both at grade and below grade, with the majority of the metro project being underground. Complex tunneling and soil retaining solutions by Dextra were utilized in the construction of this project.

Glass Fiber Reinforced Polymers (GFRP) as Tie-back anchors to retain soil

To eliminate concerns of encroachment, and obstacle for future construction projects, the Diaphragm Wall (D-Wall) at Al Sadd C-Ring Station were post-tensioned anchored with ASTEC Active Active Anchor. These high performance, fully cut-able GFRP anchors were chosen by ALSYJ JV contractors and the D-Wall anchors of choice. This innovative solution was chosen because it can be cut by Tunnel Boring Machines (TBM) or standard excavation equipment, it also doesn’t need to be removed from the ground even in temporary applications. For Al Sadd C-Ring Station 7,113 strands for GFRP rebars were used to make approximately 700 ground retaining anchors used in the D-WALL around that station.

第2回ホーチミン市環境衛生

第2回ホーチミン市環境衛生

The Second Ho Chi Minh City Environmental Sanitation Project consists of the construction of interceptor that will convey the wastewater collected from the Nhiêu Lộc-Thị Nghè Canal and District 2 areas of Ho Chi Minh City to the treatment plant.

Dextra has been involved in the construction of the large underground system by supplying 40 Soft-Eyes to assist in the tunnel breakthroughs.

The cuttable Glass Fiber Reinforced Polymer (GFRP) Soft-Eyes were applied to reinforce 21 shafts, allowing the penetration by the Tunnel Boring Machine (TBM) without the need of removing steel reinforcement and without the risk to damage the TBM’s head.

With its completion, planned to be in 2022, the wastewater services in HCMC will have a considerably more sustainable nature, and will be remembered as the first big step toward the alleviation of the environmental and sanitation issues of the Country.

Mexico – Toluca Inter-city train (Tren Interurbano México – Toluca)

Mexico – Toluca Inter-city train (Tren Interurbano México – Toluca)

To reduce traffic congestion on Mexico – Toluca highway, as well as to ease connections between both cities, the Secreatariat of Commuciations and Transportaion (SCT) is undergoing the construction of the new Mexico city areas’ 55.7-kilometer rail line. Aiming to be an environment-friendly project, the commuter rail line includes 4.7-kilometer double-tube tunnel in highly complex terrain and natural protected areas.

The new train will connect Toluca Valley to Mexico City, and will provide a service to an estimated 270,000 commuters. The line included 6 stations: 2 terminals (Zinacantepec and Observatorio) and 4 intermediate (Cristobal Colon, Metepec, Lerma, and Santa Fe). It will also be a backbone for Mexico City area’s regional and urban transport.

The construction being initiated in 2015, the railway is scheduled for completion in 2019.

Light and productive rebar coupler solution for the construction project

For the reinforcement of the railways concrete structures, Dextra supplied more than 100,000 Rolltec splices. The system is a practical and economic alternative to laps. Rolltec is also supported by one rebar preparation equipment, and only one man is needed to operate the machine.

Plus, thanks to the performance of our machines, the thread is ready in less than 30 seconds!
Moreover, with Rolltec system, the same type of coupler can be used for both standard and position applications, resulting in an optimized inventory of the project.

For more information about our projects in Latin America, contact our Panama Office.

Cairo Metro – Line 3

Cairo Metro – Line 3

Since the first 29km segment of the Metro Line 1 opened in 1987, the Cairo Metro project has revolutionized the transit system in the capital.
Currently the whole network comprises 3 operational lines numbered from 1 to 3. Line 3 consists of four phases, and the first segment started operation in 2012.

Three new metro stations were opened as part of the fourth phase of the third line on June 15, 2019, a week before the kickoff of the 2019 African Cup of Nations (AFCON) in Cairo.

Dextra has continuously provided construction solutions since the operation of Line 2 in 2000, delivering since then more than:

-1,400,000 rebar couplers

-7,000 sonic tubes

-60 soft-eyes

Bartec rebar couplers are used for rebar reinforcement of tunnel and station structures on both underground and elevated metro lines as a way to reduce steel congestion and improve tensile connection.

Moreover, the integrity test of the metro foundations using the Cross Sonic Logging (CSL) testing method was facilitated by the usage of SONITEC sonic tubes, designed for easy assembly and installation in reinforcement cages.

Dextra’s ASTEC soft-eyes are made of GFRP rebar to reinforce D-Walls in underground tunnels, which can easily be cut by Tunnel Boring Machine (TBM), resulting in time and money savings.

The project is still ongoing and the fourth line of the Cairo Metro is expected to start operation in 2020.

地下鉄ナーグプール駅、地下鉄ゼロマイル駅

地下鉄ナーグプール駅、地下鉄ゼロマイル駅

マハーラーシュトラ州ナーグプール市で行われている交通機関/駐車場/商業複合プロジェクトのナーグプール地下鉄ゼロマイル駅。市内を北から南に横断する新しい地下鉄線上にあります。ゼロ マイル ステーションは、商業エリアと 430 台収容の駐車場を備えた 12 階建ての建物を組み合わせた地下鉄駅です。

このプロジェクトでは、デクストラは 2017 年に、掘削エリア周囲の地盤を安定させるためのグラウンド アンカーの供給と設置に参加しました。

Dextra は、革新的な ASTEC (FRP) アクティブ アンカー ソリューションを提供しました (AAA)、一時的な用途の場合、たとえ敷地境界線を超えて伸びていたり、将来のトンネルにぶつかったりしても、プロジェクト終了後に地面に残すことができる特別なタイプのグラウンドアンカーです。

実際、FRP アンカーバーの主な利点の 1 つは、アンカーを従来の掘削装置で完全に切断できることであり、最後に力任せに地面から取り外す必要がある鋼製アンカーである従来の取り外し可能なアンカーの最良の代替品になります。プロジェクトの。

Dextra ASTEC アクティブ アンカーは持ち運びが軽く、作業員が最終的な場所まで運ぶことができます。ドリルで開けられた穴に挿入されると、各アンカーにグラウトが注入され、その後 FRP アンカーに接続された従来の PT ストランドを使用して応力が加えられます。追加のプロジェクト管理が必要であり、耐用年数が終了したアンカーの撤去費用が発生する従来の取り外し可能なアンカーとは異なり、設置後もアンカーを地中に残すことができます。

インドにおける Dextra アンカリング ソリューションの詳細については、弊社までお問い合わせください。 ムンバイ事務所.

Doha Metro Rail – Phase 1

Doha Metro Rail – Phase 1

Doha Metro Phase 1 is Qatar’s mega infrastructure project of three metro lines with a total length of 164 km. The first phase involves the construction of red, green and gold lines and their major stations. It is a part of a US$36,000 million Doha Metro Rail Network Project, aiming to reduce the city’s road traffic congestion while facilitating the connection between Qatar and other Gulf countries.

The required completion period of this project is extremely short: with excavation starting in mid-2013 and operations expected by 2019. With the timeline of the project being constrained, high innovative solutions are required to complete the building of underground structures in a minimal amount of time.

Dextra’s FRP Active Anchors as temporary tie-backs in retaining walls

Composite materials have been used for over 20 years as temporary reinforcement in concrete structures. In Doha metro phase 1, both Dextra’s post-tensions carbon-FRP (CFRP) Active Anchors and glass-FRP (GFRP) Active Anchors have been used in retaining walls. When used as temporary tie-backs, CFRP material is offering the most advanced technical solution thanks to its superior properties in tensile, creep and durability, while the GFRP Anchors offers a cost-effective solution without technical compromise.

GFRP anchors can advantageously replace steel removable anchors to prevent encroachment of neighboring plots. This is why nowadays, GFRP anchors account for more than 90% of the FRP anchors installed in the region.

For the first phase of the Doha Metro Rail Network project, Dextra has been supplying 150 CFRP Active Anchors and 700 GFRP Active Anchors to date.

ASTEC Soft-Eye for a better penetration of TBMs

Dextra’s ASTEC Soft-Eyes is a unique technology using cut-able GFRP reinforcement as a replacement of conventional steel rebars. Since 1996, this solution has become a standard concept in the design of shafts and subway stations. More than 10 sets of Dextra’s ASTEC Soft-Eyes have been supplied and used in Doha Metro construction project as per May 2018.

ホーチミン市地下鉄 – 1 号線 (ホーチミン市地下鉄、ベトナム)

ホーチミン市地下鉄 – 1 号線 (ホーチミン市地下鉄、ベトナム)

ホーチミン市地下鉄 – 1 号線は、都市鉄道管理局 (MAUR) が実施する巨大都市の 109 キロメートルの鉄道プロジェクトの最初の部分です。

大量交通システムが実現すると、ホーチミン市地域は地下鉄6路線でカバーされ、住民や観光客が市内を簡単かつ便利に通勤できるようになり、都市生活の質が向上します。

プロジェクトの第 1 段階では、ベンタイン市場とスオイティエン公園を結ぶ 19.7 キロメートルの鉄道線の建設が行われます。 11駅を含む17.1キロの高架鉄道と、3駅を含む2.6キロの地下線の建設も含まれる。

ベトナム最大の都市の建設のために、Dextra はコンクリート補強材と鉄筋システムの両方のソリューションを提供してきました。
強く補強されたエリアでの鋼材の混雑を軽減するために、請負業者の清水・前田共同運用会社はデクストラのエンドアンカーを選択しました。ヘッド付きバーは、鉄筋フックの簡単な代替品です。

設置はコンパクトアンカープレートを補強バーの先端にねじ込むだけです。このソリューションにより最終的にプロセスが容易になり、コンクリートの品質が向上します。

Grand Paris Express – Line 15

Grand Paris Express – Line 15

The Grand Paris Express is currently the largest transport project in development in Europe.

The new 200-km, 68-station automated railway network consists of a ring route around Paris (line 15) and three additional lines (16, 17 and 18) connecting adjacent neighborhoods.

These 4 new lines will circle the capital and link to 3 airports and many business districts. It will transport 2 million commuters a day. The lines are planned to open in stages, with the full completion of the project scheduled for 2030.

The construction of line 15 started in 2015, with its first section between Pont de Sèvres Métro station and Noisy – Champs RER A station.

Dextra was involved at that stage by providing 100,000 Fortec rebar couplers to connect the columns of the stations’ structure.

Additionally, Dextra supplied 15,000 meters of Sonitec sonic tubes to facilitate the structural integrity testing using the CSL (Cross Sonic Logging) method, thus ensuring the homogeneity of concrete within the deep piles and diaphragm walls that are being constructed for the future underground stations.

The first section of line 15 is scheduled to open in 2020.

深層トンネル下水道システム (DTSS) – フェーズ 2

深層トンネル下水道システム (DTSS) – フェーズ 2

深部トンネル下水道システム (DTSS) は、シンガポールの長期的なきれいな水のニーズを満たすために、シンガポール公共事業委員会 (PUB) によって開発されている中古水インフラ プロジェクトです。

DTSS は、沿岸地域にある 3 つの集中水再生プラント (WRP) に使用済み水を運ぶために深いトンネルを展開しています。

使用済みの水は処理され、さらに精製されてきれいな水となり、ブランド名「NEWater」として供給され、過剰な処理排水は放水管を通じて海に排出されます。

このプロジェクトでは、地下約 50 メートルに直径 6.5 メートル、全長 80 km の 2 本の大型トンネルを建設し、3 か所の集中 WRP に下水を運びます。

プロジェクトは 2 つのフェーズで開発されます。第 1 段階は 2008 年に完成し、既存の重力式下水道から東のチャンギ WRP と北のクランジ WRP まで水の流れを導く、長さ 48 km の深部トンネル システムで構成されています。

第 2 段階では、長さ 30 km の南トンネル、60 km の接続下水道、トゥアス WRP、および 12 km の深海放水路を通ってトンネル システムを西に拡張します。

第 2 段階では、Dextra はトンネル掘削を安定させるために 1,210 個のロックボルトと、TBM 突破のために GFRP ソフトアイを 8 個供給しました。

Soft Eye & Rock Bolt

2022 年に予定されているフェーズ 2 の完了時には、トゥアス WRP の NEWater 工場はシンガポールの総水需要の 55% に貢献することになります。

さらに、Tuas WRP は 1 日あたり 800,000 立方メートルの使用済み水を処理し、世界最大の膜バイオリアクター施設となります。

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