Method and excavation method for reinforcing column parts of adjacently constructed parallel tunnels with reinforcing rods
A technology for tunnels and columns, applied in tunnels, tunnel linings, and earth-moving drilling, etc., can solve the problems of reduced tunnel structure safety, reduced formation permeability, etc. The amount of bullets, the effect of reducing deformation
Active Publication Date: 2017-03-22
HYUN E&C CO LTD
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Problems solved by technology
[0014] In addition, when the column is reinforced by compressing both sides of the column by grouting and prestressing, since the permeability of the formation itself is reduced, in soft soil and sand, the upper part of the column reaches saturation, and therefore when the effective stress decreases And when the shear strength is reduced, the structural safety of the tunnel is reduced, making it a problem that it is necessary to install a drainage path through which the groundwater above the column can be drained smoothly
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[0064] Describing in detail the unexcavated portion 12 at the column as the loosened area, when the tunnel is excavated, the excavated surface is deformed in the rightward direction of the excavated surface, and the stress originally applied to the ground due to the excavation is released. The deformation exhibits the greatest deformation at the excavated surface; as the excavated surface gets deeper, the deformation becomes smaller; the deformation can vary according to the type of formation, but at a depth from about 2m to 6m, the deformation is very small. According to an exemplary embodiment of the present invention, this area is defined as a loosening area and the column is reinforced by fixing the unexcavated part 12 of the column side as a soil cover with the loosening area of the column side so that the column to be reinforced has no Loosening; and piercing the column with a drill, penetrating the column 2 to its outer excavation, inserting the linear tension reinforc...
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The present invention relates to a method of reinforcing a column section so that the ground between two or more tunnels of adjacent constructions serves as a column section and a method of excavation. The method is characterized by comprising the steps of: first excavating a front part of a first tunnel formed in parallel with a second tunnel and formed with a given space; holes formed in the side walls of the first tunnel A plurality of reinforcing rods are inserted and grouted to serve as the column part between the first tunnel and the second tunnel, the reinforcing rods pass through the unexcavated part (12) of the column part and enter the second tunnel side for excavation Expose the reinforcing rods for the second tunnel; pour surface reinforcement shotcrete to the reinforcing rods (20') exposed by excavation of the second tunnel to form a slab structure (40) to which pressure plates are placed and the slabs The structure is fastened by nuts; and pouring surface reinforcement shotcrete to the reinforcement bars exposed by excavating the unexcavated portion (12) of the column portion on the first tunnel side to form a plate structure (40) to which the pressure plate is placed And the plate structure is fastened by nuts.
Description
technical field [0001] Exemplary embodiments of the present invention relate to methods of reinforcing and excavating columns so that the ground between adjacent tunnels is used as a substitute for columns when closing construction of at least two tunnels. Background technique [0002] Among the terms used in this specification, the former tunnel (used as the opposite of the latter tunnel) means a tunnel that has been fully or partially excavated; the latter tunnel means a tunnel excavated close to the previous tunnel, while the Keeping a predetermined interval in the length direction and following the previous tunnel so that the work space for reinforcing the column is ensured in the previous tunnel before excavating the latter tunnel; an adjacent tunnel means one in which the previous tunnel and the latter tunnel are close to each other tunnel. [0003] Recently, in the whole country, when adjacent tunnels are formed, the tunnels are designed to be separated from each oth...
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IPC IPC(8): E21D11/10E21D11/18
CPCE21D11/10E21D11/18
Inventor 徐东贤
Owner HYUN E&C CO LTD