Hydraulic blasting method of transmission tower with angle steel structure

Abstract

The invention discloses a water pressure detonating method for an angle steel structure power transmission tower. The method comprises the following steps that 1, thread holes are perforated in firstangle steel, and third angle steel is installed at one end of the first angle steel; 2, the first angle steel is welded to angle steel to be detonated and welded to form a cylindrical structure, and asteel plate is welded to the bottom of the cylindrical structure; 3, water bags and explosive packages are placed into the cylindrical structure in an alternating manner, and the explosive packages are guided out of the cylindrical structure through a nonel detonator; 4, second angle steel is fixed to the first angle steel and the third angle steel through bolts, and the whole cylindrical structure is sealed; and 5, defending, evacuating and warning are carried out, and detonating can be carried out after preparation work before detonating is completed. According to the method, the cylindrical structure is welded to the angle steel to be detonated, the two ends of the cylindrical structure are sealed through the steel plate and the angle steel, a closed space is formed, the water bags andthe explosive packages are arranged in the closed space, incompressibility of liquid water is utilized, the detonating damage degree is improved greatly, and the detonating effect can be ensured.

Description

technical field [0001] The invention relates to a hydraulic blasting method for an angle steel structure transmission tower, belonging to the field of blasting. Background technique [0002] According to the plan, my country will build dozens of UHV DC projects in the next 10-20 years, and gradually form a UHV AC-DC hybrid power grid, which will supply power to the central and eastern load centers through UHV DC and AC systems. In order to alleviate the problems faced by the multi-infeed DC system, such as insufficient reactive power support capacity of the receiving end grid, and the dense sending system causing the short-circuit current to cross the line, UHV layered DC has become a new DC access mode. Compared with conventional UHV DC, the main difference is that the high-end converter transformer and low-end converter transformer on the inverter side are respectively connected to 500kV and 1000kV power grids, and the AC filter and reactive power compensation device are a...

AI Technical Summary

Problems solved by technology

[0003] However, when constructing UHV transmission towers, most of the old iron towers are on the same path as the newly built new iron towers, and the original line ground wires and iron towers must be removed before construction can begin.

The dismantling of angle steel laps in our country is still in its infancy and needs to be dismantled by workers, which is labor-intensive, low-efficiency, and highly dangerous.

In the angle steel truss, it is impossible to blast through the hole, only exposed blasting, a large part of the energy is dissipated into the air, and the blasting effect is poor

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