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A construction method of drilling, splitting and digging

A technology of construction method and scheme, applied in earth-moving drilling, mining equipment, tunnels, etc., can solve problems such as tunnel noise and safety, and achieve the effect of reducing construction noise, ensuring construction safety, and reducing the difficulty of drilling and splitting.

Active Publication Date: 2022-04-05
CHINA RAILWAY CONSTR HEAVY IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a drilling and splitting excavation construction method to solve the noise and safety problems in the tunnel construction process

Method used

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  • A construction method of drilling, splitting and digging
  • A construction method of drilling, splitting and digging
  • A construction method of drilling, splitting and digging

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Effect test

Embodiment 1

[0043] see Figure 1 to Figure 2 , a drilling and splitting excavation construction method, the present embodiment is applied to the tunnel drilling and splitting excavation construction at the entrance of the tunnel.

[0044] A drilling and splitting excavation construction method, using the drilling and splitting trolley in the Chinese patent application number 201910074591. The tensile strength is much smaller than the compressive strength characteristics. First drill the split hole, and then extend the splitting rod into the split hole to split (expand) the rock for rock-breaking excavation, which effectively solves the adverse effects of drilling and blasting excavation. A safe, stable and effective static pressure excavation method, under special geological conditions, is a supplement to the drilling and blasting method or an effective alternative to the excavation of short and medium length tunnels in hard rock. Include the following steps:

[0045] Drilling holes in ...

Embodiment 2

[0064] see Figure 3 to Figure 4 , this embodiment is applied to the tunnel drilling and splitting construction in the middle of the tunnel. The difference between this embodiment and Embodiment 1 is that the rock grade of the face 8 is measured, the rock grade of the upper part of the face 8 is grade IV, the rock grade of the lower part of the face 8 is grade II, and vertical drilling is adopted. In the excavation scheme, a horizontal row of empty layer holes 1 is drilled along the upper and lower boundaries of the tunnel face 8 in the horizontal direction, and the upper area of ​​the tunnel face 8 is selected as the initial excavation area.

[0065] In this embodiment, the rock grade at the upper part of the face 8 is grade IV, and the rock grade at the lower part of the face 8 is grade II. Therefore, the hole layout scheme 2 is adopted in the drilling and splitting area at the upper part of the face 8, and the split holes 3 and 4 are used. The hole diameter is 76mm, and th...

Embodiment 3

[0071] see Figure 5 to Figure 6 , this embodiment is applied to the tunnel drilling and splitting excavation construction of the deep buried section of the tunnel. The difference between this embodiment and Embodiment 1 is that the rock grade of the face 8 is measured, and the rock grade of the face 8 is evenly distributed. The rock grade is Class I, and the construction is difficult. The excavation scheme of circular drilling is adopted, and the hole 1 for the air layer is intensively drilled along the circular trajectory line 7 at the center of the face 8. The diameter of the outer circular trajectory line 7 is 700mm.

[0072] In this embodiment, hole layout scheme 1 is adopted on the face 8, the diameter of split hole 5 6 is 65 mm, and the distance between adjacent split holes 5 6 is 350 mm; Figure 5 shown.

[0073] The densely drilled area with the circular trajectory line 7 on the tunnel face 8 is selected as the initial excavation area, and the tunnel boundary and the...

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Abstract

The invention provides a construction method of drilling, splitting and digging. Including drilling the hole in the air layer along the tunnel contour line; according to the rock grade difference distribution of the tunnel face, choose the horizontal drilling and splitting excavation scheme, the vertical drilling and splitting excavation scheme or the circular drilling and splitting excavation scheme to determine the initial excavation area; According to the rock grade of the drilling and splitting area of ​​the face, the corresponding split hole layout plan is formulated; the split hole in the air layer hole and the split hole in the initial excavation area is split by the drill splitting machine; the initial excavation area after splitting Tunneling; drilling and driving of the face beyond the initial excavation area. The invention replaces the drilling and blasting construction by drilling and splitting construction, which reduces the construction noise, reduces the damage to construction personnel, and ensures the construction safety. At the same time, a reasonable construction sequence is set according to the rock grade difference of the working face, and the efficiency of drilling, splitting and excavation is improved. construction efficiency.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a drilling, splitting and excavation construction method. Background technique [0002] With the rapid development of high-speed railway and expressway traffic construction, the amount of tunnel construction has increased rapidly. Traditional tunnel construction often uses the drilling and blasting method for excavation. Rock drilling rigs are used to drill blast holes first, and then place explosives for blasting and tunnel excavation. , this type of construction method is widely used in tunnel construction in my country, and the construction technology is mature. The drill and blast method has the advantages of simple construction procedures, high efficiency, and low cost, but usually blasting excavation is accompanied by adverse effects such as blasting vibration, noise, and dust; However, in the tunnel construction section with low rock hardness and soft ground, the drilling ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00
CPCE21D9/00
Inventor 刘飞香刘在政刘金书潘国智刘鑫付庆
Owner CHINA RAILWAY CONSTR HEAVY IND
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