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ZTT Series TBM

CRCHI makes full use of CRCC’s abundant tunnel construction experience, in the field of TBM, developed its own advanced system integration and manufacturing technology, attended the National 863 Program’s TBM science & technology support project. Now CRCHI has already fully acquired TBM’s technology of designing, manufacturing and application.
According to different geology condition, the designing proposal provided by CRCHI’s R & D ....
Product Name:
ZTT Series TBM

Product Type:
According to the structure design of shield, TBM can be divided into open-type TBM, single-shield TBM and Double-shield TBM.

Product Introduction:
CRCHI makes full use of CRCC’s abundant tunnel construction experience, in the field of TBM, developed its own advanced system integration and manufacturing technology, attended the National 863 Program’s TBM science & technology support project. Now CRCHI has already fully acquired TBM’s technology of designing, manufacturing and application.
According to different geology condition, the designing proposal provided by CRCHI’s R & D can satisfy geology adaptability, using economical efficiency and product reliability. CRCHI can provide excellent after-sales service and technical support. 

Product Features:
Open-type TBM is mainly used in rock environment with completed stable surrounding rock. When the partial surrounding rock is not stable, TBM can make lining support with its own auxiliary equipment such as steel arch assembling device, jumbolter and concrete shot, keeping the tunnel wall stable.
When the TBM confronts with partial soft rock or fracture zone, it may need advance reinforcement with TBM’s accessory equipment such as advanced drill and concrete grouting equipment, the TBM can continue to proceed after the surrounding rock become self-stable. The property variation of surrounding rock can be directly observed during TBM’s tunneling,  it is good to describe the geologic drawing. 
Single-shield TBM is mainly used in rock condition with fracturing surrounding rock, low compressive strength and low self-stability. Its thrust principle is familiar with that of shield, the TBM makes tunneling by thrust gripping on erected prefabricated segments or steel ring beam.
Dual-shield TBM is widely used in rocky condition, which is not only applicable for stable hard rock stratum, but also for unstable soft rock stratum.

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