KR19990037866A - A Constructing Method for Excavating for Tunnel - Google Patents

Abstract

The present invention relates to a method for excavating a tunnel, and in particular, significantly shortens the excavation period by significantly lengthening the length of one excavation site. Briefly describing the technical configuration, the core portion 10 corresponding to the center portion of the tunnel excavation surface, the enlarged portion 20 around the core portion 10, the peripheral portion 30 to protect the excavation line around the enlarged portion And drilling the blasting holes 50 to a predetermined length in each of the bottom parts 40 of the bottom with an excavating equipment, and installing and controlling the charge 60 appropriately in the blasting holes 50, respectively. In detonating and blasting, the blasting holes 50 drilled in the heart portion 10, the enlarged portion 20, the peripheral portion 30 and the bottom portion 40 are all the length of the excavation rod 70 of the excavation equipment Installed in parallel to each other and drilled, but the core portion 10 is drilled in a small diameter at a suitable position around the large hole and the large hole that can be used as a free surface in the center portion. Small holes 52 are to be drilled in parallel.

Description

Tunneling method with rapid excavation speed {A Constructing Method for Excavating for Tunnel}

The present invention relates to a method for excavating a tunnel, and more particularly, to a tunnel excavation method with a fast excavation speed that greatly shortens the excavation period by greatly lengthening the length of one excavation site.

In the conventional tunnel excavation method, as shown in Figs. 1A and 1B, the core portion 1 corresponding to the center portion of the tunnel excavation surface, the enlarged portion 2 around the core portion 1, and the periphery of the enlarged portion are shown. Drill the blast holes 5 to a predetermined length in the peripheral portion 3 of the edge portion and the bottom portion 4 of the bottom portion with the excavation equipment, respectively, so that each blast hole 5 is inclined toward the center of the center at a predetermined angle. -Drill in cut form, and install the charge (6) to each of the blast holes (5) appropriately, and detonated by exploding the charge and excavation.

Conventional tunneling method of excavation as described above is to blast the blasting holes 5 in the V-cut form to blast sequentially from the heart portion 1 to the periphery 3. Therefore, the heart pit (1) first falls out, and a free surface is formed, which is sequentially detonated toward the periphery and blasted.

However, the conventional tunnel excavation method is limited to one length of excavation length because it drills in a V-cut shape in which the blasting holes 5 are inclined at a predetermined angle toward the center to facilitate the extraction of the heart. There was only.

That is, as shown in Fig. 1B, since the excavation equipment, for example, the excavating rod 7 of the dot board reel, comes into contact with the left and right side walls of the tunnel, it is difficult to install and drill a long excavating rod 7.

Therefore, since the length of one excavation site is inevitably short, there is a problem that the tunnel excavation time is delayed for a long time due to the slow excavation speed.

Accordingly, an object of the present invention is to provide a tunnel excavation method with a rapid excavation speed that shortens the tunnel excavation time by drilling a plurality of blast holes in parallel to significantly lengthen one excavation length.

Figures 1a and 1b is an exemplary view showing a punched state of the conventional blast hole

Figure 2 is a front view showing a state of blast hole according to the present invention

3 is an enlarged view of a portion “A” of FIG. 2;

4 is a cross-sectional view taken along the line B-B of FIG.

<Description of Symbols for Main Parts of Drawings>

10: heart 20: enlarged portion 30: peripheral portion

40: bottom part 50: blasting ball 51: antiaircraft

52: pore 60: charge 70: drilling rod

Hereinafter, the technical configuration of the present invention will be described.

Tunnel excavation method with a rapid excavation speed of the present invention is the core portion 10 corresponding to the center portion of the tunnel excavation surface, the enlarged portion 20 around the core portion 10, the peripheral portion 30 around the edge portion of the enlarged portion Perforations of the blast holes 50 to a predetermined length in each of the bottom portion 40 of the bottom portion and the excavation equipment, and to install the appropriate charge (60) to the blast holes 50, respectively, the charge In detonating the blasting, the blasting holes 50 drilled in the heart portion 10, the enlarged portion 20, the peripheral portion 30 and the bottom portion 40 are all excavating rod 70 of the drilling equipment Perforated by installing parallel to each other in the longitudinal direction, the perforated part 51 is drilled in a large diameter that can be utilized as a free surface in the center portion, and a small diameter at a suitable position around the perforated 51. It is characterized in that the small holes 52 are drilled in parallel.

Here, the large hole 51 is not used to charge by utilizing the free surface, and the small hole 52 is provided with the charge 60 similarly to the blasting hole 50.

Therefore, the present invention can perforate the blasting holes 50 in parallel and utilize the large hole 51 of the heart portion 10 as a free surface, thereby significantly lengthening the length of one excavation field. For reference, the length of one excavation site conventionally does not exceed 3.5m, but the present invention using the dot board reel as an excavation equipment can excavate 4m to 5m.

Hereinafter, the present invention will be described in more detail with reference to exemplary embodiments shown in the accompanying drawings.

Embodiments of the present invention, as shown in Figures 2 to 4, the core portion 10 corresponding to the center portion of the tunnel excavation surface, the enlarged portion 20 around the core portion 10, the enlarged portion thereof Perforations of the blasting holes 50 to the predetermined length in the periphery 30 and the bottom portion 40 of the circumferential edge portion with the excavation equipment, respectively, and the charge 60 is appropriately applied to the respective blasting holes 50 In the installation by adjusting and detonating the charge, the blasting holes 50 drilled in the heart portion 10, the enlarged portion 20, the peripheral portion 30 and the bottom portion 40 are all excavating equipment Install the drilling rods 70 in parallel in the longitudinal direction, and drill each, but the core portion 10 has a large diameter that can be drilled in a large diameter that can be utilized as a free surface in the center, and around the large diameter 51. The basic principle of the present invention is that the small holes 52 drilled in small diameters at appropriate positions are drilled in parallel. It is to embody technical ideas.

Here, one large hole 51 may be punched out or several drill holes may be punched out. However, in the embodiment of the present invention, as shown in Figure 3, the hole 51 is drilled in the vertical direction, but shows that the two holes 51, the outer circumference line is grounded with each other.

The outer blast holes 50 of the periphery 30 are preferably drilled so that their tip ends slightly in the circumferential direction, that is, outwardly, as shown in FIG. This is to facilitate the drilling of the next step, to secure a work space to install the excavation equipment 70 by excavating slightly wider than the design drawing.

On the other hand, the length of one excavation site can be lengthened by the above method, but it is necessary to minimize overburden on the tunnel wall surface when blasting. In order to minimize such overbreak, it is important to properly adjust the position, the number, and the amount of charge between the blast holes 50. Controlling the position, number and dose between these blast holes 50 may vary depending on the cancer.

The embodiment of the present invention shown in Figures 2 and 3 shows a typical blasting pattern of hard rock, the position, number and dose between the blasting holes 50 are shown in Table 1. Here, the heart blast hole is a heart blasting portion 10, the expansion blast hole is an enlarged portion 20, the design rig protection ball and the design dig line is a periphery 30, the bottom hole is a blast hole corresponding to the bottom portion 40 ( 50), the total blast number is 155 and the total dose is 242.38kg.

Therefore, the position, number and dose between the blast holes 50 may vary according to the rock quality, but Table 1 shows typical blasting patterns in the case of hard cancer, and when the blasting is performed in such a pattern, the overbreak can be minimized. .

Blasting pattern (load, primer) division Non-electrical primer number Airlift Storage Medicine Allowance Dose amount per delay Total dose GD 29x1,100 (kg) GD 25 x 200 (kg) GD 25 x 1,100 (kg) Fine-1 17x500 (kg) Heart ball MS 0 One 1.78 1.78 1.78 MS 3 One 1.78 1.78 1.78 MS 5 One 1.78 1.78 1.78 MS 7 One 1.78 1.78 1.78 MS 8 One 1.78 1.78 1.78 MS 10 One 1.78 1.78 1.78 MS 0 + 42 One 1.78 1.78 1.78 MS 3 + 42 One 1.78 1.78 1.78 MS 5 + 42 One 1.78 1.78 1.78 MS 7 + 42 One 1.78 1.78 1.78 MS 8 + 42 One 1.78 1.78 1.78 MS 10 + 42 One 1.78 1.78 1.78 21.36 sub Total 12 Magnification Blaster MS 11 One 1.78 1.78 1.78 MS 12 One 1.78 1.78 1.78 MS 13 2 1.78 1.78 3.56 MS 14 One 1.78 1.78 1.78 MS 15 One 1.78 1.78 1.78 MS 16 2 1.78 1.78 3.56 MS 17 One 1.78 1.78 1.78 MS 18 One 1.78 1.78 1.78 MS 19 2 1.78 1.78 3.56 MS 20 2 1.78 1.78 3.56 LP 5 One 1.78 1.78 1.78 LP 6 3 1.78 1.78 5.34

division Non-electrical primer number Airlift Storage Medicine Allowance Dose amount per delay Total dose GD 29x1,100 (kg) GD 25 x 200 (kg) GD 25 x 1,100 (kg) Fine-1 17x500 (kg) Magnification Blaster LP 7 2 1.78 1.78 3.56 LP 8 2 1.78 1.78 3.56 LP 9 3 1.78 1.78 5.34 LP 10 3 1.78 1.78 5.34 LP 11 One 1.78 1.78 1.78 LP 12 2 1.78 1.78 1.78 LP 16 2 1.78 1.78 3.56 LP 18 One 1.78 1.78 1.78 MS 11 + 42 One 1.78 1.78 1.78 MS 12 + 42 One 1.78 1.78 1.78 MS 13 + 42 2 1.78 1.78 3.56 MS 14 + 42 One 1.78 1.78 1.78 MS 15 + 42 One 1.78 1.78 1.78 MS 16 + 42 2 1.78 1.78 3.56 MS 17 + 42 One 1.78 1.78 1.78 MS 18 + 42 2 1.78 1.78 3.56 MS 19 + 42 2 1.78 1.78 3.56 MS 20 + 42 2 1.78 1.78 3.56 LP 5 + 42 One 1.78 1.78 1.78 LP 6 + 42 3 1.78 1.78 5.34 LP 7 + 42 2 1.78 1.78 3.56 LP 8 + 42 2 1.78 1.78 3.56 LP 9 + 42 3 1.78 1.78 5.34 LP 10 + 42 3 1.78 1.78 5.34 LP 11 + 42 2 1.78 1.78 3.56 LP 12 + 42 2 1.78 1.78 3.56 LP 14 + 42 One 1.78 1.78 1.78 LP 16 + 42 2 1.78 1.78 3.56 LP 18 + 42 One 1.78 1.78 1.78 sub Total 71 1.78 1.78 1.78

division Non-electrical primer number Airlift Storage Medicine Allowance Dose amount per delay Total dose GD 29x1,100 (kg) GD 25 x 200 (kg) GD 25 x 1,100 (kg) Fine-1 17x500 (kg) Design Excavator LP 14 3 1.78 1.78 5.34 LP 18 One 1.78 1.78 1.78 LP 20 3 1.78 1.78 5.34 LP 25 4 1.78 1.78 7.12 LP 14 + 42 3 1.78 1.78 5.34 LP 18 + 42 2 1.78 1.78 3.56 LP 20 + 42 3 1.78 1.78 5.34 LP 25 + 42 4 1.78 1.78 7.12 sub Total 23 40.94 Design Excavator LP 30 6 0.11 0.58 0.69 4.14 LP 35 4 0.11 0.58 0.69 2.76 LP 40 4 0.11 0.58 0.69 2.76 LP 45 4 0.11 0.58 0.69 2.76 LP 30 + 42 6 0.11 0.58 0.69 4.14 LP 35 + 42 4 0.11 0.58 0.69 2.76 LP 40 + 42 4 0.11 0.58 0.69 2.76 LP 45 + 42 4 0.11 0.58 0.69 2.76 sub Total 36 24.84 Bottom MS14, MS15MS17, LP5LP8, LP12LP35 13 0.94 1.28 2.22 2.22 sub Total 13 28.86 sum 155 242.38

As such, the present invention is a blast hole 50 perforated in the heart portion 10, the enlarged portion 20, the peripheral portion 30 and the bottom portion 40 all the excavation rod 70 of the drilling equipment in the longitudinal direction Perforations are installed in parallel to each other, but the core portion (10) is drilled in a large diameter that can be utilized as a free surface in the center portion of the large hole (51), and a small hole perforated in a small diameter at an appropriate position around the large hole ( By drilling 52 in parallel, it is possible not only to greatly increase the length of one excavation field, but also to shorten the tunnel excavation period as a whole.

Claims (3)

Heart portion 10 corresponding to the center portion of the tunnel excavation surface, the enlarged portion 20 around the heart portion 10, the peripheral portion 30 to protect the excavation line around the enlarged portion and the bottom portion of the bottom portion ( In each of the blasting device (50) to a predetermined length in each of the excavating equipment, and to install the appropriately adjusted charge (60) in each of the blasting holes (50), to detonate the blasting, The blasting holes 50 drilled in the cardiac part 10, the enlarged part 20, the peripheral part 30, and the bottom part 40 are all installed in parallel in the lengthwise direction of the excavating rod 70 of the excavating equipment. Perforations, but the core portion (10) is parallel to the large hole (51) to be drilled in a large diameter that can be utilized as a free surface in the center portion, and the small hole (52) to be drilled in a small diameter at an appropriate position around the large hole (51) in parallel Tunneling method of rapid excavation speed characterized by being drilled. The tunnel drilling method of claim 1, wherein the large hole (51) is bored with two holes which are grounded in the vertical direction. The method of claim 1, wherein the blast holes (50) of the periphery (30) is drilled in a fast excavation speed, characterized in that the perforated toward the circumferential direction, that is slightly outward.