Analysis of the Open-Type TBM Excavation in Poor Geological Conditions in Pakistan N-J Hydropower Project

›› 2018, Vol. 32 ›› Issue (4): 365-368.

Analysis of the Open-Type TBM Excavation in Poor Geological Conditions in Pakistan N-J Hydropower Project

ZENG Linglong， LEI Shangwen

（CGGC N-J Pakistan Project Management, Yichang 443002）

Received:2017-07-13 Revised:2017-07-20 Online:2018-08-20 Published:2018-08-23

Abstract

Abstract: The construction of the Pakistan NeelumJhelum (NJ) Hydropower Plant, which is in the northwest side of Himalaya Mountains, is primarily depend on the underground tunnel excavation in poor and complicated geological conditions and high overburden geopressures. Based on the construction of opentype TBM trail excavation at the headrace tunnel, the surrounding rock mass classification in opentype TBM tunnel was summarized, then the initial supporting parameters under the different surrounding rock mass conditions and technical measures of construction in the fracture zone have been determined.

Key words: Open-Type TBM, Surrounding Rock Mass Classifications, Supporting Structures, Poor Geological Conditions

ZENG Linglong， LEI Shangwen. Analysis of the Open-Type TBM Excavation in Poor Geological Conditions in Pakistan N-J Hydropower Project[J]. , 2018, 32(4): 365-368.

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Analysis of the Open-Type TBM Excavation in Poor Geological Conditions in Pakistan N-J Hydropower Project

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