Blasting and dismantling special local protecting method of building

Abstract

The invention relates to a blasting and dismantling special local protecting method of a building. The protecting method comprises the following steps: first, determining a special position of the building to be blasted and dismantled and a collapse touchdown place of the special position according to a blasting notch, a collapse way and a collapse range of a blasting and dismantling design of the building; and then, according to a blasting design, punching a hole by adopting a routine method and equipment, carrying out blasting charge, blocking a blast hole and connecting a detonating network; and finally, binding or putting a flexible material on the special position; or paving a soft material at the collapse touchdown place; or paving the soft material at the collapse touchdown place while binding or putting the flexible material on the special position. By using the blasting and dismantling special local protecting method of the building, not only can the touchdown flyrock of the collapsing building be eliminated, the touchdown shock be decreased and the personnel injury and death and the property loss which are possibly caused be avoided, but also the interference of a material and labor consumption to production, life and traffic and the influence on the environment are also avoided, and the job progress is quickened.

Description

technical field [0001] The invention relates to building blasting demolition technology, in particular to a special local protection method for building blasting demolition. Background technique [0002] my country's blasting demolition started in the 1950s. Over the past few decades, with the rapid development of economic construction, great progress has been made, rich experience has been accumulated, and it has become an important part of engineering blasting. Because it is relatively safe, efficient, economical, and does not require complex equipment, it has become the preferred method for the demolition of various buildings. However, the flying rocks and ground vibrations induced by the collapse of buildings during demolition may cause casualties and Damage to surrounding facilities, in order to prevent it and avoid negative impacts, people have been digging shock-absorbing trenches to weaken the effect of ground vibration, or laying a certain thickness of loose sand cu...

AI Technical Summary

Problems solved by technology

These measures are not only costly, labor-intensive, time-consuming, blocking traffic, and affecting the environment, but also have a huge impact on densely populated cities, seriously restricting the development and application of blasting demolition technology, and forming blasting demolition technology because of its advantages in cities. While playing a huge role in construction, its application is severely restricted by various factors

[0003] The safety distance of buildings collapsing, touching the ground, flying rocks and ground shaking is the first consideration in the design of demolition blasting, in order to avoid them from causing casualties and damaging surrounding buildings (structures) and equipment. Blasting the warning area and carrying out necessary protection and relocation will not only cause a significant increase in project costs, but also seriously affect the normal production and life of the city. The economic losses and social impacts in highly densely populated cities are particularly prominent, and should be avoided.

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