Novel explosion sinking assistance method for open caisson

Abstract

The invention relates to a novel explosion sinking assistance method for an open caisson. An open caisson foundation is made to sink by removing underwater hard clay and stone or cementation layers and other hard formations through explosions. The novel explosion sinking assistance method includes the steps that S1, embedded pipes are installed in an open caisson platform; S2, a free face is provided for the explosions in the manner that mud is sucked inside a shaft; S3, hole drilling is conducted through a geological drilling rig; S4, charging is conducted; and S5, networking and detonating are conducted. The feasible method for effectively assisting in open caisson sinking through the explosion means is put forward, and because explosion apparatuses for civil use are adopted for the method, the sinking effect is improved and the novel explosion sinking assistance method is safe, reliable and feasible.

Description

technical field [0001] The invention belongs to the technical field of engineering blasting, and in particular relates to a novel caisson blasting-assisted sinking method for removing hard strata such as underwater hard clay, stones or cemented layers by blasting to sink a caisson foundation. Background technique [0002] The caisson foundation is a form of underground structures and deep foundations constructed by the caisson method. It is to make a well-shaped structure (caisson) on the surface first, and then under the enclosure of the well wall, through continuous excavation from the well, the caisson will gradually sink under the action of its own weight, and after reaching the predetermined design elevation, then Make the back cover and build the internal structure. The buried depth of the caisson can be very large, the integrity is strong, the stability is good, the bearing area is large, and it can withstand large vertical loads and horizontal loads. It is not only...

AI Technical Summary

Problems solved by technology

However, after reaching the clay layer during the sinking process, these sinking aid methods cannot effectively and quickly remove and discharge obstacles when encountering relatively hard obstacles or strata and other similar geological conditions, resulting in the failure of the deep well foundation to sink smoothly, delaying Construction Schedule

[0004] The biggest problem with the caisson construction method is that during the sinking process, after reaching the clay layer, due to its own weight, it cannot overcome the reaction forces such as the support force at the bottom and the friction force on the well wall, so that it cannot continue to use ordinary soil discharge methods to sink to achieve design elevation

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