Self-balancing method with stepped load box

Abstract

The invention discloses a stepped type load box for a self-balance method. An upper-layer annular load box, a lower-layer annular load box and folding fan-shaped connecting rods are included. The circumference side wall between the upper-layer annular load box and the lower-layer annular load box is connected with the folding fan-shaped connecting rods. The upper-layer annular load box comprises an upper-layer annular load box upper top plate and an upper-layer annular load box body, the outer wall of a stepped type load box body is wrapped by a self-balance test pile, the self-balance test pile is divided by the stepped type load box body into a self-balance upper section pile and a self-balance lower section pile, and an inner cavity of the stepped type load box body is a circular tablebody. According to the stepped type load box, the load box is innovatively divided into the upper layer and the lower layer, on the premise that the provided load is not changed, the area of the layersection occupied by each-layer load box is reduced by near two times, it means that the larger area is achieved for concrete in the layer for grout overturning, grout can smoothly pass, and reliability of self-balance test pile construction is guaranteed.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a stepped load box for self-balancing method. Background technique [0002] As a pile test method that can test the ultimate bearing capacity of piles, the self-balancing test pile method is welcomed by the engineering community for its advantages of simple operation, economy and safety, no need for surcharge or anchor piles, adaptability to the water environment, and narrow construction space. In recent years, the self-balancing test pile method has become more and more popular at home and abroad. Due to the self-balancing pile test method, the load box needs to be placed in the middle or bottom of the pile body, and then the load box is filled with oil to load the load box to push the upper and lower pile sections or the load box directly presses the pile bottom soil and the pile. For the test pile at the bottom, there is no problem of disconnecting the reinforcement...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the above problems in the prior art. When loading the existing load box, the loads are all on the same plane, resulting in the fracture surface also in the horizontal direction. When the horizontal force is applied, this plane becomes the main weak point. situational issues

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