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Drilling and splitting excavation construction method

A construction method and scheme technology, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., can solve the problems of tunnel noise and safety, and achieve the effects of reducing construction noise, ensuring construction safety, and reducing injuries

Active Publication Date: 2020-10-02
CHINA RAILWAY CONSTR HEAVY IND
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  • Summary
  • 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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  • Drilling and splitting excavation construction method
  • Drilling and splitting excavation construction method

Examples

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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 drilling and splitting excavation construction method. The method comprises the steps of drilling an adjacent empty layer hole along the contour line of a tunnel; selecting ahorizontal drilling and splitting excavation scheme or a vertical drilling and splitting excavation scheme or an annular drilling and splitting excavation scheme according to the rock grade differencedistribution condition of a tunnel face, and determining an initial excavation area; making a hole distribution scheme of corresponding split holes according to the rock grade of the drilling and splitting area of the tunnel face; splitting the adjacent empty layer hole and the split holes in the initial excavation area by using a drilling and splitting machine; tunneling the split initial excavation area; and drilling, splitting and tunneling the tunnel face except for the initial excavation area. According to the method drilling and blasting construction is replaced by drilling and splitting construction, so that the construction noise is reduced, the damage to construction personnel is reduced, the construction safety is guaranteed, meanwhile, a reasonable construction sequence is setaccording to the rock grade difference of the tunnel face, and the construction efficiency of drilling and splitting excavation is improved.

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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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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