On the morning of November 8, 2019, Shanhe Smart Double Happiness! On the day of the company's 20th anniversary celebration, it also ushered in a great news. China's first cross-over-type dual-mode shield machine was successfully launched in its joint venture, Tieshanhe.

Intermittent double-mode shield machine off-line ceremony

Speech by Zeng Guanglu, Director of Shenzhen Railway Office

Speech by Tan Shunhui, Chairman of China Railway Engineering Equipment Group Co., Ltd.

Speech by Wang Yinghui, Chief Economist of China Construction Tunnel Shield Branch

Speech by Pan Xiaoming, Deputy General Manager of Shenzhen Metro Construction Company II

The two shield machines that were off the assembly line were tailor-made for the Shenzhen Metro Line 13 and will be used for the construction of the No. 13 Line Xianxiandong Station to the Baimang Station. This is the first time that the Shenzhen Metro has adopted a dual-mode shield. Construction machine construction.

Interchangeable dual mode shield machine

The inter-hole interchangeable dual-mode shield machine on the lower line of the China Railway Shanhe River represents the cutting-edge technical level of the current shield industry. “It realizes the rapid switching between the two tunneling modes, which can excavate the soft soil layer and excavate the super-hard rock stratum, which is powerful and hard to eat.” Professor He Qinghua, Chairman of Shanhe Intelligent, speaks the language in easy-to-understand language. , summed up the most distinctive features of this dual-mode shield machine.

These two new off-line dual-mode shield machines are veritable "big guys." According to China Railway Shanhe, their excavation diameter is 6.98 meters, the length of the whole machine is 96 meters, and the total weight is about 650 tons.

Since the shield machine has a large body, the general shield machine only has a front-end cutter head weighing about 100 tons. When the tunneling mode is replaced, the whole process is troublesome and time consuming. The interchangeable dual-mode shield machine in the hole solves this big trouble well, realizes the rapid interchange in the hole, and greatly improves the construction efficiency of the shield machine. The interchange mode generally takes only about 15 days.

Activity scene

It is understood that China's full-section tunnel boring machine products are mainly divided into two types: earth pressure balance type shield machine and hard rock roadheader (TBM). The earth pressure balance type shield machine is mainly used for the softness of the excavation surface which cannot be self-stabilized. Soil and composite strata, hard rock roadheader (TBM) is mainly used in hard rock geological tunnel engineering with stable formation. However, if you encounter geological conditions with both soft soil and hard rock, the single-mode earth pressure balance shield machine or hard rock roadheader (TBM) can't solve the problem together.

The section of the Shenzhen Metro Line 13 from Liuxiandong Station to Baimang Station is a geological condition with both soft soil and hard rock formation. To this end, the China Railway Shanhe R&D team combined with past experience, actively organized joint scientific research, and creatively designed the interchangeable dual-mode shield machine in the hole, so that the construction requirements of two different stratum structures were met on one shield. . And the interchange mode in the hole greatly solves the trouble of replacing the cutter head with the dual-mode shield machine.

China's first batch of interchangeable dual-mode shield machines in the tunnel officially launched

Previously, China Railway Shanhe independently developed and produced the shield machine, which covers a series of large-scale high-end products such as earth pressure balance shield, mud shield, hard rock shield, hard rock roadheader, pipe jacking machine, etc., which are widely used in magnetic levitation and urban Light rail, subway, integrated pipe gallery, sponge city, underground space construction and various difficult foundation construction. Among them, the No. 2 shield machine, in the construction of Changsha subway, set a record for the long-term drilling of 27 meters in Changsha. The two-mode interchangeable dual-mode shield machine successfully launched on November 8th will be used in the construction of Shenzhen Metro, which will lay a good foundation for the further promotion of this product. (This article comes from Shanhe Intelligent)

Related News: Shanhe Intelligent Shield Machine Offline

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