Underwater blasting construction method

Abstract

The invention provides an underwater blasting construction method. The underwater blasting construction method comprises the following steps that an underwater blasting part is filled with filling bodies to a space above the water surface, and a construction platform is formed; a down-the-hole drill is used for following a steel sleeve to form a hole; the steel sleeve is stopped following after penetrating through the whole underwater filling bodies at least; the drill continues to bore to the designed position of bedrock, the drill is taken out, a PVC sleeve is inserted, and the steel sleeveis pulled out; a blasting device is bound and is put into the hole, and is blasted through an electric blasting network or a non-electric blasting network; and underwater blasting construction is completed through the above steps. With the adoption of the scheme, the underwater blasting construction can be completed under the working condition that a boring operation platform can not be set up dueto condition restriction, and the underwater blasting construction method is particularly suitable for achieving large-scale underwater blasting work under the working condition that the depth of water is relatively large.

Description

technical field [0001] The invention relates to the field of drilling and blasting construction, in particular to an underwater blasting construction method. Background technique [0002] For a diversion channel, cofferdams were built at the inlet and outlet of the channel and on the left bank of the channel to ensure that the canal body was constructed under dry land conditions, and finally the water inlet and outlet were constructed by underwater demolition and blasting. The 20m range of the inner slope toe of the upstream and downstream cofferdams, the occupied area of ​​the cofferdam and the area outside the cofferdam are all underwater excavation areas, with a total area of ​​about 22,700 m 2 , with a total excavation volume of 200,000 m 3 . Due to the limitation of local conditions, it is impossible to build a construction platform on the water, and the construction is difficult. [0003] Moreover, the common underwater hole drilling is generally carried out by geol...

AI Technical Summary

Problems solved by technology

Due to the limitation of local conditions, it is impossible to set up the construction work platform on the water, and the construction is difficult

[0003] Moreover, the common underwater pipe drilling is generally carried out by geological drilling rig or 100B down-the-hole drilling rig, and the drilling efficiency is low. The general construction efficiency is 5m~8m / shift

The weight of the drilling rig itself is small, but when the equipment drills holes in the backfill gravel, due to the inhomogeneity of the medium, the drilling rig is easy to shift, causing the heel pipe to break

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