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A Rapid Excavation and Blasting Forming Method for Dam Foundation Based on Mixed Explosive Vehicle

A molding method and explosive vehicle technology, applied in blasting and other directions, can solve the problems of fast and efficient construction technology that is not in line with modern construction technology, large errors in manpower and material resources on-site charge, and affect construction efficiency, so as to improve the construction efficiency of dam foundation protection and excavation. Effects of Improving Charge Quality and Precisely Controlling Detonation Point Position

Active Publication Date: 2016-03-30
WUHAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, technologies such as reserved protective layer and horizontal pre-splitting excavation will increase the construction process and seriously affect the construction efficiency, which is not in line with the fast and efficient characteristics of modern construction technology
[0003] At present, in the rapid excavation and blasting forming technology of the foundation surface, in terms of improving construction efficiency, there are obviously problems such as long operation time, low efficiency, a large amount of manpower and material resources, and large errors in the amount of charge on site.

Method used

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  • A Rapid Excavation and Blasting Forming Method for Dam Foundation Based on Mixed Explosive Vehicle
  • A Rapid Excavation and Blasting Forming Method for Dam Foundation Based on Mixed Explosive Vehicle
  • A Rapid Excavation and Blasting Forming Method for Dam Foundation Based on Mixed Explosive Vehicle

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Experimental program
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Effect test

Embodiment 1

[0035] (1) Making the energy collecting and dissipating pedestal (1), spare; the energy collecting and dissipating pedestal (1) includes a cone and a cylinder connected from top to bottom;

[0036] (2) According to the blasting design, carry out blast hole (7) fixed-point setting out of the hole position in the blasting area (6), determine the hole position elevation and design hole depth, and drill the blast hole according to the blasting design requirements;

[0037] (3) Use the measured hole depth to compare the actual hole depth H 1 And design hole depth H 0 , Calculate the amount of over-excavation and use sand filling (5) for leveling to ensure that the bottom of all blast holes (7) are at the same elevation, that is, the bottom of the hole is leveled;

[0038] (4) Slowly put the energy-dissipating pedestal into the bottom of the blast hole (7), and then accurately charge explosives on site according to the depth of the hole and the amount of charge after the bottom of the hole ...

Embodiment 2

[0046] (1) Make the energy dissipation seat. The energy concentrating seat is made by using the reflection and transmission principles of stress waves on different media surfaces. It should be a test block made of materials with high strength, high density and high wave impedance. The shape of the test block is the upper cone and the lower cylinder. shape. The conical part is placed upwards. When the explosive detonation pressure is transmitted, the 45° inclination surface of the cone is used to reflect the vertical downward stress wave into a horizontal stress wave, thereby concentrating the energy near the horizontal plane of the hole bottom. Play the role of horizontal energy gathering and vertical energy dissipation, which is not only beneficial to the flatness of the bottom of the hole, but also can protect the integrity of the bedrock at the bottom of the hole. The diameter of the cylindrical end of the pedestal is D 1 , The height is h 1 ; The height of the cone section...

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Abstract

The invention provides a dam foundation rapid excavation blasting forming method based on a mixed loading truck. The method comprises the following steps of (1) manufacturing an energy gathering and dissipating cushion seat (1) for standby; (2) drilling a blast hole; (3) leveling a hole bottom; (4) placing the energy gathering and dissipating cushion seat, and then charging on site; (5) connecting a detonator; (6) stemming a blasting borehole; (7) networking on site, and preparing to detonate. The dam foundation rapid excavation blasting forming method based on the mixed loading truck is applicable to large-area blasting construction areas, and is high in charging quality and quick in speed, and can utilize the mixed loading truck to measure the hole depth and carries out sand filling and leveling, and carries out mechanized construction and is convenient and high-efficient, and can utilize the mixed loading truck to place the energy gathering and dissipating cushion layer to the hole bottom, and can effectively prevent the problems that the cushion layer blocks the hole and the like. According to the dam foundation rapid excavation forming blasting technology based on the mixed loading truck provided by the invention, the dam foundation protection excavation construction efficiency can be greatly improved, and the requirement of quick construction is met favorably.

Description

Technical field [0001] The invention relates to a dam foundation rapid excavation and forming blasting technology based on a mixed explosive vehicle, which is suitable for large-area blasting and excavation of important foundation surfaces (such as dam foundation surfaces, etc.) in the geotechnical engineering fields such as mining, hydropower, and transportation . Background technique [0002] In hydropower projects, bench blasting has the advantages of large mining volume, high construction efficiency, and simple blasting operations, and has become the most commonly used construction excavation method. For the excavation of key parts such as the foundation surface, taking into account the requirements for the degree of damage and flatness of the foundation surface after blasting, a more sophisticated blasting construction process is required, and the extensive operation is changed to fine operation. At present, the excavation protection technology for the foundation surface ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/08F42D3/04
Inventor 刘亮严鹏席浩吴刚卢文波陈明王高辉付开红
Owner WUHAN UNIV