Process for limiting drug amount directional blasting replacement mollisol stone packing

Abstract

The invention discloses a method to replace soft soil stone fill with medicine limited directional explosion, which is characterized by the following: adopting built-in method; processing explosive materials not more than 12 kg to pen shaped charge; imbedding dip under soil with boring tool; igniting the charge orderly; forming mud-rock flow with rock rip-rap body; sliding to stone shaped state of blasting design; cycling; forming stone body state of design engineering. This invention is simple, safe and easy, which can decreases the influence of the shock after explosion.

Description

technical field [0001] The invention relates to a method for replacing rockfill in soft soil by directional blasting with a limited amount of drug, which can effectively and safely build dikes and dams in engineering projects where blasting methods cannot be used to treat soft foundations due to safety problems and difficulty in charging powder, and belong to embankment, Dam technology field. Background technique [0002] In the construction of embankments and dams along the Haijiang River and river banks, since the embankments and dams need to bear external forces such as self-weight and wind and waves, in order to maintain their own stability, the soft foundation soil layer under the embankments and dams must be replaced. The conventional construction is to rely on dredging, Stone dumping, tamping, riprapping, retamping, testing and other construction procedures are completed until the design requirements are met. The disadvantages are long construction period, low work ef...

AI Technical Summary

Problems solved by technology

[0002] In the construction of embankments and dams along the Haijiang River and river banks, since the embankments and dams need to bear external forces such as self-weight and wind and waves, in order to maintain their own stability, the soft foundation soil layer under the embankments and dams must be replaced. The conventional construction is to rely on dredging, Stone dumping, tamping, riprapping, retamping, testing and other construction procedures are completed until the design requirements are met. The disadvantages are long construction period, low work efficiency and high cost. Therefore, the construction technology of blasting and silt filling method is proposed. The construction method is to embed 30-60 kg of explosives into the mud under the embankment and dam for blasting. The soft soil layer under the embankment and dam forms a cavity, and the riprap is filled to form a "stone tongue". Then carry out the construction process of riprap and blasting. To build a dyke and dam needs to be blasted countless times, and the vibration after each blasting can affect within a radius of 300 meters. In severe cases, it will affect the protection of surrounding existing structures, or local residents or fishermen. safety and environmental protection, and the shape of the stone body after replacement cannot meet the stable shape requirements proposed by the engineering design, so it cannot be adopted or it is very difficult to adopt

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