Construction of Beijing Metro by 31 open shield machine
31 days ago, open the successful debut in the shield construction of Beijing Metro Line 6, with high price and environmental advantages to win customer recognition. For a long time of actual construction process, the performance of the equipment to make the customer very satisfied, get the owner of the high evaluation.
"I remember very clearly, equipment entering the day on August 30, 2013, the final installed completion time is November 10th, officially began at noon on March 12th is irrigated soil." As China Railway five Bureau stationed in Metro Line 6 construction team captain, Walter leaves for this Taiwan with through this "roar of life" their exposure shield is impressive.
In fact, as a senior engineering and technical personnel, ye Stewart had seen many brands of shield machine at home and abroad, but the domestic equipment that he really is the first time I saw. Of course, that does not prevent him from admiring the new device.
"We face geological conditions of single construction, it has obvious advantages than other shield machine, theoretically it can do continuous construction, advancing side soil pressure and unearthed; the traditional shield propulsion to do." Yelt said excitedly, "and it's cost-effective, because there is no master drive, no tool wear."."
This is very much the leaf Stewart "new" shield machine, is hosted by the Beijing railway construction and Management Co. Ltd., Beijing 31 heavy machine Co. Ltd., China Railway five Bureau in Beijing city undertake major scientific and technological projects "open type shield machine development and application" achievements, mainly applicable to anhydrous or less water and soil has certain self stability of strata, dedicated to gravel, gravel and Boulder, Boulder formation instead of closed shield and shallow mining method, the mining face open type of shield machine is open, it can handle arbitrary barriers to efficient size gravel, exploration of unknown underground pile etc..
Based on the geological survey report, Western Beijing city for the thick cobble stratum or gravel stratum, general closed shield machine in this geological condition, the construction difficult, high cost and low efficiency. While the 31 exposure shield is in the manufacturing, with lots of boulders of fast construction speed, low cost, land subsidence model, to fill the gap and achieve even more than similar products in the world.
In order to solve the earth pressure balance shield and slurry shield closed shield machine to face huge gravel excavation difficulties, 31 groundbreaking research exposure shield machine. Due to the limitation of the circular cutter head, the section of the open shield machine can be designed to be the most suitable shape. Today, 31 is capable of developing an open shield machine of various sizes and shapes (round, rectangular, horseshoe shaped, etc.).
Beijing pile machine shield project group deputy general manager Lv Chuantian said, the actual construction data show that compared with the closed shield machine, the purchase cost of open shield machine will be about 70% lower, the construction cost per meter and save about 3000 yuan. Generally speaking, the construction cost of the subway is about 30 thousand yuan per meter, so the open shield machine can save about 10% of the construction cost."
Unlike the conventional shield machine, open shield machine tunneling working face is not closed, the construction personnel can be assisted in operation of shield machine is mainly suitable for hard soil, underground water level low large pebbles many strata, using this shield machine parts almost all achieved domestically, the core of the pump is the company's 31 Putzmeister products, which is unique in domestic brands.
The 31 open shield machine, fully demonstrates the 31 for the regional market research and development, is a powerful weapon to expand the depth of marketing 31 characteristic demand introduction, has a positive role in achieving the strategic objectives of the 31.
