Engineering database \ Earthwork blasting scheme of a project

Earthwork blasting scheme of a project

Uploaded on: 2019-03-14 12:56:21

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Advanced blasting technology shall be adopted in the design and construction to ensure that the project quality meets the requirements

Earthwork blasting scheme of a project - Figure 1

Earthwork blasting scheme of a project - Figure 2

Earthwork blasting scheme of a project - Figure 3

Earthwork blasting scheme of a project - Figure 4

Earthwork blasting scheme of a project - Figure 5

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This project can shorten the main river channel of this section from 1322m to 370m, with a net increase of 160.5 mu, forming a relatively concentrated industrial park of 452 mu, improving the utilization rate of land and the value of construction land.

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The rock excavation of this contract section is mainly concentrated in two sections: 1 K22+080—K23+800；2、K24+500—K25+655， The total designed rock volume is: 199900 m3. At present, there is about 180000 m3 left. IV. Relevant technical requirements 4.1 Safety allowable distance and environmental impact assessment 1 General provisions (1) Safety allowable distance between explosion source and personnel and other protected objects in case of blasting, destruction of blasting equipment and accidental explosion of blasting equipment warehouse, Various harmful effects of blasting (seismic wave, shock wave, individual flying objects, etc.) shall be checked and verified respectively, and the maximum value shall be taken. (2) The distance between various explosive material warehouses and between the warehouse and the temporary stacking point shall be greater than the corresponding safety distance for blasting. In various blasting operations, the distance between charges detonated at different times shall also meet the requirements of not sacrificing blasting. (3) When determining the allowable safety distance for blasting, secondary harmful effects such as landslides, rolling stones, avalanches, swells, and blasting pile slippage that may be induced by blasting should be considered, and the allowable safety distance should be appropriately expanded or additional danger zones should be designated according to specific circumstances. 2 Safety allowable distance of blasting vibration (1) Different safety criteria and allowable standards shall be adopted to evaluate the vibration impact of various blasting on different types of buildings (structures) and other protected objects. (2) The blasting vibration criterion of ground buildings adopts the peak vibration speed and main vibration frequency of the protected object at the site; The blasting vibration criteria of hydraulic tunnel, traffic tunnel, mine roadway, power station (plant) central control room equipment and newly poured mass concrete adopt the peak vibration speed of the geological point where the protected object is located. The allowable safety standards are shown in Table 1.

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According to the construction characteristics of this project and the conditions of the construction site of this project, our company configures the construction organization based on the principles of efficiency, competence, flexibility and professionalism, which is conducive to construction, scheduling, contract management and construction safety. According to the construction characteristics of this project, the organization setting principle and construction experience of our company, the construction organization on the site will be established. In order to facilitate the construction management and production scheduling command, the project department will be located near the site camp.

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About 15.5m, 1:1 sloping within 10m of the upper part. The slope surface is protected by manual driven soil nails+steel mesh shotcrete, and the lower part is supported by mechanical bored cast-in-place piles prestressed pipe anchor bolts.

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