Given force variable stiffness discrete material pile ramming and expanding machine and application thereof

Abstract

The invention relates to a given force variable stiffness discrete material ramming and expanding machine which comprises a chassis, a traveling part, a control system, a hoist system, a portal steel frame and a pile pipe ramming and expanding system. The pile pipe ramming and expanding system comprises a straight-through ramming hammer head, a hammer cushion and inner and outer sleeve pile pipes. The portal steel frame for supporting and stabilizing the inner and outer sleeve pile pipes is arranged on the chassis. A telescopic pull rod for controlling a piling angle is also connected onto the portal steel frame. The hoist system comprising lifting inner and outer pile pipes, a lifting straight-through ramming hammer head and a lifting vibrator part and the control system comprising an electric motor and an electrohydraulic linking and illuminating device are also arranged on the chassis. The straight-through ramming hammer head is positioned at the upper part of double layers of pile pipes in the sleeve structure. The given force variable stiffness discrete material ramming and expanding machine not only can be used for piling a multi-section enlarged head discrete material flexible pile, but also can be used for piling a concrete rammed and expanded rigid pile. The machine can be suitable to be applied to piling of a new construction, an extension project, a reconstruction project and the engineering for treating pathological accidents on weak or poor foundations such as interlayer soft clay, loose fine sandy soil, plain fill, miscellaneous fill, collapsed loess and the like.

Description

technical field [0001] The invention belongs to the field of mechanical and applied foundation engineering for soft foundation treatment. It is especially suitable for the reinforcement treatment of weak or poor foundation soils such as interlayered soft clay, loose silt and fine sand, plain fill, miscellaneous fill, and collapsible loess foundation. Background technique [0002] There are hundreds or even thousands of foundation treatment and reinforcement methods at home and abroad. For the reinforcement of the above-mentioned weak soil layers or loose and poor foundations, the traditional treatment method is a single treatment method. According to its reinforcement treatment mechanism, it generally includes replacement method (also known as replacement method), densification method, drainage method, cementation method, reinforcement method and underpinning method (the method used only for the foundation reinforcement of old buildings) ). Although the specific construct...

AI Technical Summary

Problems solved by technology

[0007] Since the power of the existing static pile machine is only 30T and 40T, the static pressure generated by the reaction device provided by it is limited to a certain extent, and the length of the pile should not exceed 12m and the bearing capacity of the composite foundation provided The eigenvalues ​​are also limited

Images