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A Construction Method of Controlled Blasting in Tunnel Damping Holes

A technology for controlling blasting and construction methods, applied in blasting and other directions, can solve problems such as large vibration of upper buildings and pipelines, damage to buildings and pipelines, etc., and achieve the effects of reducing damage, reducing blasting vibration speed, and good blasting effect

Active Publication Date: 2015-08-05
中国建筑土木建设有限公司
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for controlled blasting of tunnel damping holes, to solve the problem that through the existing blasting construction method, large vibrations will be generated on the upper buildings and pipelines, so that the buildings and pipelines are under construction. Technical issues that disrupted

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  • A Construction Method of Controlled Blasting in Tunnel Damping Holes
  • A Construction Method of Controlled Blasting in Tunnel Damping Holes
  • A Construction Method of Controlled Blasting in Tunnel Damping Holes

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Embodiment Construction

[0031] Examples see Figure 1 to Figure 4 As shown, among them, figure 2 In the middle, the solid round holes in the peripheral eye area, auxiliary eye area and cut eye area are the peripheral eye, auxiliary eye and cut hole in turn. The number indicates the rank of the detonator outside the hole.

[0032] A construction method for controlled blasting of damping holes in a tunnel, the steps of which are as follows:

[0033] Step 1, arranging the first row of damping holes 3 along the center line of the excavation contour line 1 on the face of the upper step;

[0034] Step 2, setting the second row of shock-absorbing holes 4 inwardly from the center line of the first row of shock-absorbing holes 3; Step 3, setting the third row of shock-absorbing holes 5 on the periphery of the cut eye area 7;

[0035] Step 4, arranging peripheral eyes in the peripheral eye area 2, the peripheral eyes are arranged at intervals with the first row of shock-absorbing holes 3, cutting holes are...

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Abstract

The invention relates to a construction method of a tunnel shock relieve hole controlling blasting. Shock relieve holes are circumferentially distributed in the peripheries of an upper step arch part and a slotting zone, and a row of inner shock relieve holes and a row of outer shock relieve holes are especially formed in periphery hole zone of the upper step arch part, presplitting belt width of the periphery holes after blasting is increased, presplitting effect is strengthened, meanwhile through separating and cutting function of the shock relieve holes, explosive load is lowered, earthquake stress is reduced, and thus the target of reducing blasting vibration velocity is achieved. The construction method of a tunnel shock relieve hole controlling blasting can be widely applied to blasting construction in a tunnel mining construction, and especially to a city flourishing area and an area with a plurality of pipelines.

Description

technical field [0001] The invention relates to a tunnel excavation construction method, in particular to an underground excavation construction method using blasting construction. Background technique [0002] As the country advocates vigorously developing public transportation, subway projects are widely constructed in large and medium-sized cities across the country. The commonly used construction methods for subway projects include shield tunneling method, open excavation method, concealed excavation method, cover excavation method, caisson construction method, etc. The construction method to be adopted shall be determined according to the surrounding construction environment, the soil mass of the excavation site and the project cost. For economic considerations, the underground excavation method is widely used in subway tunnel construction in our country. During underground excavation construction, blasting operations are required in hard rock formations. However, if t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00F42D3/04F42D5/045
Inventor 肖龙鸽孙贵华杨昆鹏傅启路张海波
Owner 中国建筑土木建设有限公司
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