A method for cofferdam blasting

A technology of cofferdams and anti-seepage walls, which is applied in blasting and other directions, can solve problems such as affecting construction operations, delaying the construction period, and difficulty in slag removal, and achieves the effects of rapid design, precise blasting, and significant economic benefits

Active Publication Date: 2022-03-04
淳安千岛湖子龙土石方工程有限公司
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Problems solved by technology

[0004] In the still water area, there are usually important hydraulic structures near the demolition blasting area. The blasting shock wave, blasting flying rocks and blasting slag accumulation should be strictly controlled, and the impact on the surrounding environment and aquatic organisms during blasting should be reduced. If there is a little carelessness, the consequences will be unimaginable; coupled with the limited capacity of slag removal equipment, the difficulty of underwater slag removal, and high costs, it is difficult to remove slag, which directly affects subsequent construction operations and easily delays the construction period

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  • A method for cofferdam blasting
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Embodiment Construction

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] The present invention is a cofferdam blasting method, specifically for common rock sill cofferdams, that is, by building concrete cut-off walls on the rock sills and building high-pressure jet grouting pile walls inside and outside the concrete cut-off walls, including the following process: Measure the shape of the cofferdam: determine the shape of the concrete cut-off wall, the wall shape of the high-pressure jet grouting pile, and the shape of the rock sil...

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Abstract

The invention discloses a cofferdam blasting method and relates to the technical field of cofferdam blasting. The invention includes: measuring the shape of the cofferdam: determining the shape of the concrete anti-seepage wall, the wall shape of the high-pressure rotary grouting pile and the shape of the rock ridge; The anti-seepage wall and the high-pressure rotary grouting pile wall simulate the layout of the hole position, hole depth and hole diameter; determine the depth of the blasting water level of the underwater rock sill; In the blasting section, the position, depth and diameter of the blasting holes are simulated, and the holes are drilled and charged according to the simulated hole positions; the water is diverted, and the millisecond delay blasting scheme is used for blasting. The invention establishes models for different component structures in the cofferdam and predicts and calculates the lumpiness of concrete and rocks, classifies blasting, and realizes precise blasting.

Description

technical field [0001] The invention belongs to the technical field of cofferdam blasting, in particular to a method for cofferdam blasting. Background technique [0002] Cofferdam refers to the temporary enclosure structure built for the construction of permanent water conservancy facilities in the construction of water conservancy and hydropower projects. Pit, building buildings, generally mainly used in hydraulic construction, except as a part of formal buildings, cofferdams need to be removed after use. [0003] Cofferdams are generally built according to terrain and geological conditions and local conditions. Therefore, there are many types of cofferdams and their structures are complex. According to the relative position of the cofferdam and the water flow direction, it can be divided into horizontal cofferdam and longitudinal cofferdam; according to whether the foundation pit is allowed to be submerged during the diversion period, it can be divided into overwater co...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): F42D1/00F42D3/02
CPCF42D1/00F42D3/02
Inventor吕跃奇翁永明管圣军李永红管朝波
Owner淳安千岛湖子龙土石方工程有限公司