कोयम्बटूर बी-पोर्टेजम मोंडेगो मेट्रो परियोजना कोयम्बटूर, पुर्तगाल की जन पारगमन सार्वजनिक परिवहन प्रणाली का हिस्सा है। डेक्सट्रा ने ढेर परीक्षण के लिए सोनीटेक ट्यूब प्रदान करके एक महत्वपूर्ण भूमिका निभाई है।

डेक्सट्रा ने 12 से 19 मीटर की गहराई तक के कुल 67 ढेरों के परीक्षण के लिए सोनीटेक ट्यूब की आपूर्ति की है। क्रॉस-होल सोनिक लॉगिंग (सीएसएल) पद्धति के साथ इन परीक्षणों को संचालित करने में ट्यूबों की महत्वपूर्ण भूमिका रही है।

सोनीटेक के इनोवेटिव पुश-फिट कनेक्शन सिस्टम ने इंस्टॉलेशन के दौरान श्रम समय को काफी कम कर दिया है। इस उपयोगकर्ता-अनुकूल प्रणाली के लिए धन्यवाद, ठेकेदार ने चिकनी और अधिक कुशल ढेर परीक्षण प्रक्रियाओं का अनुभव किया है। अतिरिक्त श्रम-गहन प्रक्रियाओं की आवश्यकता को समाप्त करके, ठेकेदार ने बहुमूल्य समय और संसाधनों की बचत की है। यह पाइल्स के बीच एक सुरक्षित और विश्वसनीय कनेक्शन भी सुनिश्चित करता है।

लंदन क्रॉसरेल (2016 में एलिजाबेथ लाइन नाम दिया गया) यूरोप की सबसे बड़ी इंजीनियरिंग परियोजना है। यह ट्रांसपोर्ट फॉर लंदन के निवेश कार्यक्रम का एक प्रमुख हिस्सा है और 50 वर्षों के लिए परिवहन प्रणाली में सबसे बड़ा विस्तार है।

इस परियोजना में ग्रेटर लंदन में 118 किलोमीटर पूर्व-पश्चिम रेल लिंक शामिल है जो पश्चिम में रीडिंग और हीथ्रो से पूर्व में शेनफील्ड और एबी वुड तक चलेगा।

2009 के बाद से, डेक्सट्रा ने 20 से अधिक पैकेजों पर 600,000 से अधिक ग्रिपटेक कनेक्शन वितरित किए हैं, जिनमें निम्नलिखित स्टेशन शामिल हैं:

• लिवरपूल स्ट्रीट
• पैडिंगटन
• बॉन्ड स्ट्रीट
• कैनरी घाट
• रॉयल ओक पोर्टल
• पुडिंग मिल लेन

ग्रिपटेक कप्लर्स का उपयोग डी-वॉल (ऊर्ध्वाधर और क्षैतिज कनेक्शन), कॉलम और पाइल्स (ऊर्ध्वाधर कनेक्शन) पर किया गया है।

दिसंबर 2019 तक पूरी तरह से पूरा होने के साथ, क्रॉसरेल के खंडों का उत्तरोत्तर संचालन शुरू होने की उम्मीद है।

The Rio de Janeiro Line 4 is a subway line. It is part elevated and part underground (2 segments). The line has been planned to open for the 2016 Rio de Janeiro Summer Olympics.

Dextra has been involved since between 2013 and 2015 in the design, engineering and supply of four large FRP Soft Eyes for the station entry/exit points. Those Soft-Eyes were the first ever delivered in the South American continent.

डी-वॉल निर्माण से पहले, डेक्सट्रा इंजीनियर टीबीएम के आकार, त्रुटि के लिए मार्जिन, मिट्टी की ताकत और अधिक डिजाइन मापदंडों को ध्यान में रखते हुए एफआरपी पिंजरे डिजाइन करते थे।

Thanks to the properties of FRP material, Tunnel Boring Machines cut through the D-Wall in a minimum time, saving time on schedule and ensuring the perfect condition of the TBM’s head. The time factor is especially important in humid environments such as Rio to limit the water entry into the station excavations.

On this project, Dextra also supplied Rolltec Rebar Couplers, used as vertical connections in the station diaphragm walls as vertical connectors to reconnect cages.

Couplers were also used horizontally to provide a reconnection point for slabs (at station level and at the surface) in the D-Walls.

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.

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.

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.

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.