Pushing device for sunken vertical shaft

Abstract

The invention discloses a pushing device for a sunken vertical shaft, relates to the technical field of vertical shaft construction equipment, and aims to solve the problems that in the prior art, a vertical shaft inclines due to non-uniform stress, and even an open caisson cannot sink in a severe condition. According to the technical scheme, the pushing device is characterized by comprising a vertically-arranged oil cylinder and a supporting frame, and the bottom of a piston rod of the oil cylinder is connected with a supporting shoe; a bearing seat is arranged at the bottom end of a piston rod of the oil cylinder, a spherical groove is formed in the bottom wall of the bearing seat, a hemispherical bearing arranged in the spherical groove and in running fit with the bearing seat is connected to the top wall of the supporting shoe, and the piston rod and the supporting shoe are fixed through a double-end stud penetrating through the bearing seat and the hemispherical bearing; and the double-end stud is sleeved with a disc spring located between the supporting shoe and a locking nut, and the locking nut abuts against the supporting shoe through the disc spring. The vertical shaft posture can be adjusted, downward additional force is increased, soil friction force is overcome in an auxiliary mode, and smooth vertical shaft construction is facilitated.

Description

technical field [0001] The invention relates to the technical field of shaft construction equipment, in particular to a jacking device for a sunken shaft. Background technique [0002] At present, with the continuous expansion of cities, the available space above the ground in many cities is becoming less and less. In order to improve urban supporting facilities, the development of underground space has become a new choice. The sunken shaft is an emerging construction technology for underground space, with simple construction, short cycle time and high safety factor. Compared with the traditional shaft construction method, it has many advantages. The general production process of the sunken shaft is to make the wall of the caisson first, then dig the soil to sink, heighten the wall, and then dig the soil to sink. After reaching the design elevation, construct the bottom plate and complete the construction. The principle of sinking is to use the self-weight of the caisson to...

AI Technical Summary

Problems solved by technology

[0003] After the shaft boring machine is excavated, the caisson will slowly sink under the action of gravity. When the ground is hard or the sinking depth is too deep, the friction between the caisson wall and the soil increases, and sometimes Uneven stress occurs, causing the shaft to tilt. In severe cases, the caisson cannot sink and continue to operate. If this problem is not solved, it will seriously affect the construction quality and progress, and even lead to the abandonment of the shaft

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