Mechanical excavation method for large-section municipal hard rock tunnel
The invention relates to the technical field of tunnel excavation, in particular to a large-section municipal hard rock tunnel mechanical excavation method which specifically comprises the following steps: S1, a first section with a 180-degree fan-shaped angle, a second section and a third section w...
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| creator | WAN ZEWEI GOU CHAO LI HONGBO GU YANG YIN YONGYUN WANG PENG DUAN XUEFENG ZUO SHUN |
| description | The invention relates to the technical field of tunnel excavation, in particular to a large-section municipal hard rock tunnel mechanical excavation method which specifically comprises the following steps: S1, a first section with a 180-degree fan-shaped angle, a second section and a third section which are sequentially expanded, a fourth section with a rectangular lower step, and a fifth section; s2, first fracture surface breaking is carried out, and second fracture surface breaking is carried out after excavation and deslagging of the first fracture surface are completed; trimming the third section; and breaking according to the fourth section and the fifth section from top to bottom in a layering manner. The method has the advantages that the equipment cost is low, and the application range is wide; 2, the excavation precision is high, and the overexcavation amount is small; 3, the construction process has small disturbance on the surrounding environment and buildings; 4, the excavation efficiency is high |
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The method has the advantages that the equipment cost is low, and the application range is wide; 2, the excavation precision is high, and the overexcavation amount is small; 3, the construction process has small disturbance on the surrounding environment and buildings; 4, the excavation efficiency is high</abstract><oa>free_for_read</oa></addata></record> |
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| language | chi ; eng |
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| subjects | EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS |
| title | Mechanical excavation method for large-section municipal hard rock tunnel |
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