The method of forming ultra-deep anti-seepage wall

Abstract

The invention discloses an ultradeep impervious wall grooving method. The ultradeep impervious wall grooving method includes the steps that a groove hole is formed with a composite blasting method asfor the situation that an impervious wall needs to be embedded into riverbed high steep slope bed rock, wherein a first drilling machine is used for drilling a riverbed steep slope, so that a drill hole penetrating through a covering layer into a bed rock steep slope bevel is formed; a first blasting device is arranged below the drill hole and positioned on the steep slope bevel, and the first blasting device is used for blasting the steep slope bevel into a flat bevel; a second drilling tool is used for continuing to drill the bed rock below the flat bevel to form a blasting hole, and a second blasting device arranged in the blasting hole is used for blasting the bed rock below the flat bevel; and a third drilling machine is used for continuing to break and drill the blasted bed rock until an end hole is formed. According to the method, the ultradeep impervious wall can be grooved under the condition that construction conditions are harsh, the impervious wall is embedded into the riverbed high steep slope bed rock, the drilling efficiency is high, the effect is good, the construction period of the impervious wall is shortened, and the quality of the impervious wall is improved.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a method for forming an ultra-deep anti-seepage wall. Background technique [0002] Concrete anti-seepage walls are a mature technology among various foundation treatment and foundation engineering technologies at home and abroad. In the water conservancy and hydropower industry alone, countless anti-seepage walls have been built. With the changes of the times and the updating of technology, the cut-off wall has undergone earth-shaking changes in terms of construction technology, groove-forming machines and tools, environmental protection requirements, special case handling, etc., in order to meet the construction needs of different cut-off walls. [0003] At present, the use of cut-off walls as an anti-seepage solution in earth-rock dams with good construction environment, unlimited construction time, and a depth of less than 100 meters is in a mature ...

AI Technical Summary

Problems solved by technology

[0003] At present, the use of cut-off walls as an anti-seepage solution in earth-rock dams with good construction environment, unlimited construction time, and a depth of less than 100 meters is in a mature stage. Under the construction environment with limited time, if the bedrock surface of the river bed is in a deep "V" shape, the slope of the bedrock surface on one or both sides is greater than 50°, and the maximum depth of the cut-off wall exceeds 150 meters or even 180 meters. Said that according to the previous construction experience, the construction could not be carried out smoothly.

Because, when making holes in the steep slope bedrock, because the drilling tool is easy to slip when it falls and smashes the bedrock, it is very difficult to insert the rock. Unqualified rock seriously affects the quality of the cut-off wall

So far, there is no effective solution to the construction of the above-mentioned cutoff wall in the art

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