A Reinforced Cutting Correction Structure and Cutting Method
An undercutting eye and wire slot technology, which is applied in the field of strengthening undercutting correction structure and undercutting, can solve problems such as unsatisfactory blasting efficiency, and achieve the effect of reducing unsatisfactory blasting and improving blasting effect.
Active Publication Date: 2019-12-03
CHENGDU UNIV
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[0014] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0015] Such as figure 1 As shown, a reinforced cut correction structure provided by an embodiment of the present invention includes: two reinforced cut holes 1 are vertically arranged at a certain distance from the center line of the tunnel cavity to the bottom plate, and the reinforced cut holes 1 Three pairs of main cut holes 2 and two pairs of correction cut holes 3 are symmetrically arranged on both sides to form a composite reinforced vertical wedge cut. The main cut holes 2 are wedge-shaped with large orifice spacing and small hole bottom spacing. The longitudinal section of the correction cut eye 3 is rectangular, and the cross section of the main cut eye 2 is isosceles trapezoid; the depth of the reinforced cut e...
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The invention relates to the technical field of tunnel rock mass driving blasting engineering, and discloses a reinforced slotting correction structure and a slotting method. According to the reinforced slotting correction structure, two reinforced slotting holes (1) are vertically formed in the positions, away from a base plate by a specific distance, of the midpoint of a tunnel center line slotted cavity. Three pairs of main slotting holes (2) and two pairs of correction slotting holes (3) are symmetrically formed in the two sides of the reinforced slotting holes (1) so as to form a compoundreinforced vertical wedge-shaped cut. The main slotting holes (2) are in the shape of a wedge with the hole opening distance being large and the hole bottom distance being small. The longitudinal section of each correction slotting hole (3) is a rectangle, and the cross section of each main slotting hole (2) is an isosceles trapezoid. The depth of the reinforced slotting holes (1) is smaller thanthat of the correction slotting holes (3). The depth of the correction slotting holes (3) is smaller than that of the main slotting holes (2). By means of the reinforced slotting correction structureand the slotting method, the phenomenon that blasting is not ideal due to the large tunnel width or high rock hardness can be reduced, the blasting effect is good, and a reference is provided for blasting tunneling construction work of tunnels of the same type.
Description
Technical field [0001] The invention relates to the technical field of tunnel rock mass excavation and blasting engineering, in particular to a reinforced cutting correction structure and a cutting method. Background technique [0002] In the construction of tunnel blasting and excavation, the wedge-shaped cutting method is often used because this cutting method is easy and simple to operate. However, when the tunnel width is large or the rock hardness is large, the blasting efficiency is often not ideal. The main reason for this problem is the difficulty of cutting, and the quality of the cutting determines the blasting efficiency. A good cutting method can improve the blasting effect and increase the blasting efficiency. Summary of the invention [0003] The invention provides a reinforced cutting correction structure and a cutting method, which solves the technical problem that the blasting efficiency of the wedge cutting method in the prior art is often not ideal when the tunn...
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IPC IPC(8): F42D1/08F42D3/04
CPCF42D1/08F42D3/04
Inventor 谢飞鸿余禹江周杰吴杰
Owner CHENGDU UNIV