Ernest Rudyak’s latest post
The tunnelling mechanized complex (TMC) called “Sofia” has completed the left tunneling distillation tunnel from “Shelepiha” metro station to the connecting branch of the Third interchange circuit and Kalinin-Solntsevo line. This project is initiated by the Department of Construction of Moscow as the state customer on-site. The contractor/company hired to do this work is JSC Combine ENGEOCOM.
Shield “Sofia” has covered an entire distance of 768 meters. The lines are running under Shmitovsky, an industrial area near the 1st Silica travel, and a dense residential development. Drifters have been working in the complex hydrogeological conditions, up to a maximum depth of 40 meters.
After completing the tunneling, the complex has gone into the excavation chamber congresses of the Third interchange circuit and Kalinin-Solntsevo line as next in the line for progress. While the second ring of the Moscow Metro will be built, the “Business Center” – “Peter Park” site will temporarily join with the Kalinin-Solntsevo line. Thus, temporarily, the train will go from “Rasskazovka” station to the “Petrovsky Park.”
Next TMC will be moved to the opposite end of the pit, where the construction will begin toward Kalinin-Solntsevo line. Usually after the completion of the shield, it is disassembled into parts, maintenance is carried out on the peices, and they are transported to the new launch site and collected again. On average, it takes 1.5 months to complete these steps. Metrostroiteley of Association ENGEOCOM says that they “plan to prepare Sophia for sinking down” in a new record time – just 15 days. For this purpose, a unique method of moving the shield whole will be used. Complex manoeuvres with a hand pallet truck are required to move the unit from one end of the excavation chamber to the other entirely without dismantling.
They are going to put a monolithic slab in the bottom of the shaft pit and install steel plates, with rails on which the “Sofia” will move, using a jacking system to install it onto the welded rails, starting from specially made stops and pulling it on the hand cart. So says Konstantin Tsallagov, head of the mechanization construction of Association ENGEOCOM. According to him, during the pulling, there will be mechanics on board with the “Sofia” to replace the cutting tools and to conduct the thorough inspection of all the components and assemblies that are usually inspected while the unit is disassembled for travel. When it is moving to the other end of the Metro interchange to begin it’s new work, the “skiing” movement of the Sofia will be cut off, and it will not operate until it has been inspected while in transit to the new construction site.
Application of this new experimental method allows Metrostroiteley reduce construction time and save money on the installation and dismantling of the complex, while still remaining safe for the workers to use in the tunneling process. Specialists construction workers with Association ENGEOCOM are “already used dragging to move the complex mechanics of “Sofia” and “Victoria” through station “Shelepiha.”
JSC Business Combinations ENGEOCOM acts as official contractor of the construction site of the Third interchange circuit of the Moscow Metro station from Business Center to Lower Maslovka.The line includes six stations: 5 – newly built (Lower Maslovka, Peter Park, Khodynka, Khoroshevskaya, and Shelepiha) and 1 being finished (Downtown). Construction site length is 12.76 km. The construction of these stations will be the beginning of formation of a new subway interchange circuit, which will provide a transplant from one branch to another without using the central congested hubs.
from Ernest Rudyak | Construction & Company Projects http://ift.tt/1WmjMBh