Tiejian Heavy Industry Successfully Developed China's First Double Shield Hard Rock TBM

On December 24th, China Tiejian Heavy Industry Co., Ltd. jointly developed with the Third Hydroelectric Power Bureau and the Yellow River Design Institute. The first double-shielded hard rock TBM with complete independent intellectual property rights was successfully developed. The successful development of this equipment has filled China's double The gap in the development of shield hard rock TBM marks a major new breakthrough in the manufacturing of large domestic high-end equipment.

Tiejian Heavy Industry Successfully Developed China's First Double Shield Hard Rock TBM

Tiejian Heavy Industry's double shield TBM off the assembly line is tailor-made for Lanzhou Water Source Construction Project. The water conveyance project is located in Xigu District of Lanzhou City. The Liujiaxia Reservoir is used as the water source for water supply to Lanzhou City. The main tunnel of the water transmission tunnel is a pressure diversion tunnel, and the double tunnel TBM is used to construct a 25-km tunnel section. In order to let the people of Lanzhou enjoy drinking water, Lanzhou City attaches great importance to this project. In light of the characteristics and difficulties of the target project, Tiejian Heavy Industry has set up a dedicated project research team to fully utilize the rich TBM construction experience of China Railway Construction and the Group’s successful development and application of various TBM advantages. The Yellow River Design Institute and other relevant units carried out adequate design exchanges, overcoming difficulties in excavation construction such as long construction distances, high rock hardness, varied formations along the line, deep burial depths, water inrush, rock bursts, and geothermal heat, etc., in equipment structural design and system control optimization. The design and optimization of various aspects such as the setting of auxiliary functions and the improvement of construction methods were carried out.

It is understood that Double Shield Hard Rock TBM is a kind of full-face TBM. It learns from and integrates the technical features of open TBM and shield machine, and it has both cutter head and outlet similar to open TBM. The slag system and the gripper device also have a shield body, a segment assembly mechanism, and a propulsion system similar to the shield machine, and is particularly suitable for rock conditions where the surrounding rock is broken and has poor stability. In addition, the model has open, single shield and double shield type of three tunneling modes, which can flexibly select different tunneling modes according to geological conditions and construction schedules, especially in the double shield mode. The set of propulsion system can realize continuous continuous excavation of TBM through alternate work, and has high excavation speed.

This double-shielded hard rock TBM designed and manufactured by Tiejian Heavy Industry was excavated with 5.49m diameter and a total length of nearly 300m. It consisted of a 12m-long main engine and a 25-trailer rear distribution system. The total weight of the equipment was 1250t, and the total installed power was installed. About 3200kw. Tiejian Heavy Industry spent only four and a half months, completed the design and manufacture of TBM equipment in terms of quality and quantity, and it took more than a year's delivery time than the international similar equipment to advance by about 8 months, breaking the development of similar products. Cycle industry practice. The equipment is expected to start in February 2016 and open her 14km long rock drill.

The successful development of the new “tough sword” with Double Shield Hard Rock TBM signifies that Tiejian Heavy Industry has established a full range of TBM production lines, with all types of full-face hard rock TBM tunnel boring machines adapted to various engineering geological conditions. R & D and manufacturing capabilities. Greatly promoted the tunnelling equipment industry upgrading, improved the level of China's equipment manufacturing industry and the core competitiveness of major equipment, indicating that China’s modern tunnel construction equipment has reached the world's leading level, which is a milestone for the innovation and development of China's high-end equipment manufacturing industry. significance. (This article comes from Tiejian Heavy Industry)