A Method for Reducing the Vibration Velocity of Tunnel Blasting Excavation in Urban Sensitive Environment

A vibration speed and sensitive technology, applied in blasting and other directions, can solve the problems of building (structure) damage, high blasting vibration speed, and affecting surrounding residents, etc., to achieve the effect of reducing damage, reducing blasting vibration, and reducing blind shots

Active Publication Date: 2022-06-24
THE 1ST ENG CO LTD OF CHINA RAILWAY 18TH BUREAU GRP +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for reducing the vibration speed of tunnel blasting and excavation in a sensitive urban environment, so as to solve the problems that the blasting vibration speed is high, causing damage to buildings (structures), affecting surrounding residents, and causing damage to surrounding surrounding rocks

Method used

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  • A Method for Reducing the Vibration Velocity of Tunnel Blasting Excavation in Urban Sensitive Environment
  • A Method for Reducing the Vibration Velocity of Tunnel Blasting Excavation in Urban Sensitive Environment
  • A Method for Reducing the Vibration Velocity of Tunnel Blasting Excavation in Urban Sensitive Environment

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Embodiment Construction

[0033] like Figure 1-7 As shown in the figure, a method for reducing the vibration speed of tunnel blasting and excavation in a sensitive urban environment includes the following steps:

[0034] Step 1: Carry out an explosion control test in a section relatively far away from the sensitive building, simulate the construction conditions of the adjacent sensitive building, collect the data of the test section, and determine the specific construction plan after the safety assessment of the sensitive building;

[0035] Step 2: Use the upper CD method as the excavation method to determine the parameters of the lining support; the specific parameters are set as: D25 hollow grouting bolt @60×120cm, 28cmC25 shotcrete, φ8 steel mesh@20×20cm, 20b work Steel beam@60cm, φ8 steel mesh@20×20cm, 50cmC50 reinforced concrete secondary lining; inverted arch 28cmC25 shotcrete, 20b I-beam@60cm, 55cmC50 reinforced concrete inverted arch;

[0036] Step 3: According to the lining support parameter...

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Abstract

The invention discloses a method for reducing the vibration speed of tunnel blasting and excavation in an urban sensitive environment, comprising the following steps: step 1, carrying out a blast control test at a section relatively far away from sensitive buildings; step 2: adopting the upper CD construction method As an excavation method, determine the lining support parameters; Step 3: Carry out the lining design of the CD pilot pit on the Ⅲ‑Ⅳ surrounding rock, and determine the pilot pit support parameters; Step 4: Step by step implementation of the left pilot tunnel and the right pilot tunnel Step 5: Set up the middle pipe shed before excavation; Step 6: Evenly arrange a number of peripheral eyes on the inner wall of the left pilot tunnel and the right pilot tunnel; Step 7: Electronic detonator single hole single sound; Step 8: Control the blasting footage; Step Nine: Fill the Peripheral Eye with Explosives. The invention reduces the blasting vibration speed, reduces the damage to buildings (structures) and the impact on surrounding residents, and realizes "non-inductive blasting" and "green and environment-friendly construction".

Description

technical field [0001] The invention relates to the field of controlled blasting construction of tunnels adjacent to sensitive buildings, in particular to a method for reducing the vibration speed of tunnel blasting and excavation in a sensitive urban environment. Background technique [0002] The 21st century is the century of large-scale development of underground space. With the continuous expansion of the construction scale of urban underground space in my country, the construction environment has become more and more complex. more common. How to realize fine blasting control of hard rock section, reduce blasting vibration speed to the greatest extent, reduce the impact on surrounding buildings (structures), reduce the impact on the daily life of surrounding residents, and strive to "non-inductive blasting" to improve tunnels The quality of blasting excavation can increase the self-stabilizing ability of surrounding rock and reduce various risks in the process of tunnel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/00
CPCF42D1/00E21D9/00
Inventor 高海东潘建立王学斌赵映冠李刚郭彦兵孙磊宋发雄薛翊国郑涛王军堂
Owner THE 1ST ENG CO LTD OF CHINA RAILWAY 18TH BUREAU GRP
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