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Underwater blasting construction method

A construction method and blasting design technology, applied in the field of bridge construction, can solve problems such as the construction progress needs to be improved, and achieve the effect of speeding up the construction progress

Active Publication Date: 2017-06-13
CHINA RAILWAY 23RD BUREAU GRP THIRD ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of science and technology and the continuous accumulation of construction experience, the construction technology of underwater foundation is also constantly developing. The excavation of underwater foundation has always been the main key point restricting the construction progress of bridges. At present, when carrying out underwater blasting construction, Construction progress still needs to be improved

Method used

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Embodiment

[0039] Geological condition

[0040] The 1# pier cap is located in the Jinsha River below the slope of Hongge Avenue, Panzhihua City. The river bed of 1# pier is rocky soil and contains large boulders, with a layer thickness of about 14m; 2# pier is excavated about 20m from the cofferdam foundation pit on the side of the road, and the upper part is excavated to the foot of the road side slope, and the road side slope is Loose accumulation of rocks sandwiched between sand. The lower part is embedded with a weakly weathered granite layer up to 8m, and the rock layer is relatively hard, so it needs to be excavated by water blasting.

[0041] surroundings

[0042] Pier 1# is basically located on the left side of Jinsha River, below the side slope of Hongge Avenue, about 30m closer to the road. The outside of Hongge Avenue is the existing Chengdu-Kunming Railway; the road traffic is heavy. Pier 2# is located on the right side of the Jinsha River, below the side slope of the Jin...

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Abstract

The invention discloses an underwater blasting construction method. The method includes the steps: reasonably designing and setting hold size d, hole distance a, hole row distance b, blast hole inclined angle alpha, drilling depth H and over-drilling depth h; reasonably designing single underwater blasting explosive consumption, explosive charge in per hole and a blasting network by the aid of layering blasting design. Compared with the prior art, according to the method, parameters are reasonably and efficiently designed in the blasting design process, blasting construction is implemented according to blasting design parameters, and foundation construction can be accelerated by the method.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to an underwater blasting construction method for foundation construction. Background technique [0002] With the vigorous development of bridge construction in China, many underwater foundation construction issues have become more and more important. With the development of science and technology and the continuous accumulation of construction experience, the construction technology of underwater foundation is also constantly developing. The excavation of underwater foundation has always been the main key point restricting the construction progress of bridges. At present, when carrying out underwater blasting construction, Construction progress still needs to be improved. Contents of the invention [0003] The object of the present invention is to provide an underwater blasting construction method in order to solve the above problems. [0004] The present invention ...

Claims

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Application Information

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IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 刘海涛张强张义君梅人俊吴胜红周川岭周琪
Owner CHINA RAILWAY 23RD BUREAU GRP THIRD ENG CO LTD
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