Gravity type anchor rod static pressing pile supporting rack and application method

Abstract

The invention discloses a gravity type anchor rod static pressing pile supporting rack and a application method. The gravity type anchor rod static pressing pile supporting rack and a application method solves the problem that multiple external forces act on a pile body and makes the pile body vulnerable to damage in the prior art, and has the beneficial effect of making the pile body only subjected to an axial force to ensure the smooth compaction of the pile body. The detailed scheme includes the steps that the gravity type anchor rod static pressing pile supporting rack comprises a counter-force rack connected with the pile body; the lower ends of two sides of the counter-force rack both are provided with rotating pieces; the rotating pieces are connected with anchor rods; the lower ends of two sides of the counter-force rack both are connected with the rotating pieces through connecting pieces; The interior of each connecting piece is provided with clamping slots; The upper parts of the rotating pieces are arranged in the clamping slots in a movable mode; and the bottoms of the rotating pieces protrude from the bottoms of the connecting pieces.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a gravity type anchor static pressure pile support and a use method. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] As a pile underpinning technology, the anchor static pressure pile is widely used in foundation reinforcement, pile repair, foundation underpinning and deviation correction. The piles are pressed into the foundation in sections by using the self-weight of the building. In the application of large-diameter or large-tonnage static pressure pile engineering, the size of the pile frame and the diameter of the pile anchor rod are relatively large, and the number of anchor rods is relatively large. [0004] Now the commonly used pile frame base and force column are all fixed together, which can be regarded as a fixed end that can tra...

AI Technical Summary

Problems solved by technology

In practical application, the foundation steel bars have been laid, and the anchor rods are often installed in the post-implantation mode. The anchor rods should try to avoid the foundation steel bars. Due to the limitation of on-site construction conditions, the setting position of the vertical rods of the pile press frame cannot be changed sometimes. The situation of opening the steel mesh; in this case, the position of the anchor is determined by the support, and the support cannot be rotated, so that the anchor can only be implanted at a fixed position, and there will be a situation where the steel mesh cannot be avoided. The anchor rod can be inserted obliquely, and the implanted anchor rod has a certain deviation in position and verticality. At this time, the anchor rod is subjected to axial force and shear force at the same time, and the fixed end of the support will generate a bending moment, which is not conducive to Provide reaction force for the static pressure pile; the inventor also found that the reaction frame is subjected to multiple actions of axial force, shear force and bending moment at the same time, which not only increases the possibility of out-of-plane instability of the reaction frame, but also causes the anchor rod to be greatly affected. Large shear force is easy to cause damage to the pile body during the pile pressing process, and then the expected design effect cannot be achieved

In addition, the heavy-duty pile press frame has a large dead weight, and the installation and disassembly process is complicated, which greatly increases the difficulty of construction

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