31 open shield nose show help Beijing subway construction       

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. In the actual construction process for a long time, the performance of the equipment to make customers very satisfied with the owners have been very high evaluation.

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. The Trinity open 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 difficult problem that the closed shield machine, such as EPB shield and slurry balance shield, is difficult to dig when facing huge gravel, 31, the open type shield machine is developed. 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.).

Lv Chuantian, deputy general manager of Beijing pile machine shield project group, said, the actual construction data show that compared with closed shield machine, open type shield machine procurement costs will be about 70% lower, the construction cost per meter can 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.