A rectification method for pile-side disturbance and resistance-reducing buildings

Abstract

The invention discloses a pile side soil sampling resistance reducing building inclination correcting method. Vertical holes are positively drilled in the foundation pile edge position of the area where the foundation settlement of an inclining building is relatively small, and after the vertical holes reach the set hole depth, reverse rotation and chambering are conducted, and the pile side is disturbed; disturbance is increased through directional water jet flow, the pile side resistance is further reduced, most of pile top loads act on the pile end, a pile end lower soil layer is compressedor pile end piercing and damage are caused, and inclination correcting settlement is finally achieved; after inclination correcting is finished, directional cement paste jet flow is conducted, and the pile side resistance is recovered; then, rotary jet flow of the cement paste is conducted within the vertical chambering range, a composite foundation is formed within the chambering range, the composite foundation is finally combined with a pile top raft, a stable pile foundation composed of the raft, an original pile and a cement soil composite pile is finally formed, and it is ensured that the building is perpetually stable. The number and the positions of the vertical holes in the outer side of the foundation pile are designed according to calculation, vertical holes different in numberand hole depth can be drilled in different foundation pile sides, but the designed pile length or the actual pile length cannot be exceeded.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to an inclination correction method for pile-side disturbance and resistance-reducing buildings. Background technique [0002] Building rectification refers to the uneven settlement of the foundation caused by the foundation, the foundation or the building itself, and the upper structure of the building deviates from the vertical position and tilts. It refers to the rectification, rectification, reinforcement and stability measures taken during the safety and normal use of buildings in order to ensure the safety of buildings and restore their normal functions. [0003] For buildings with shallow foundations, the commonly used methods of rectification include: surcharge and pressurization rectification method, soil digging rectification method, water immersion rectification method and soil excavation irrigation method, etc. When the building adopts a pile foundation, the...

AI Technical Summary

Problems solved by technology

The jacking rectification method is to cut off the main structure adjacent to the top surface of the building foundation, and then use a jack to lift the side of the building with a large settlement, so that its inclination meets the relevant national regulations and building use requirements, and then the truncated vertical connected to the component; this method has certain damage to the main structure, and has the disadvantages of high cost and high risk

The pile cutting method is to excavate the soil on the side of the pile where the settlement is small, and manually remove a certain thickness of concrete on the top of the pile to make the pile cap and the upper structure sink, so as to correct the inclination of the building; This method destroys the rigid connection between the pile and the cap, which will have an adverse effect on the building's resistance to horizontal loads and earthquake resistance

[0004] The pile tip disturbance rectification method is to form a hole on the side of the pile with a small settlement to a certain depth below the pile tip, and disturb the bearing layer at the pile tip through high-pressure pendulum spraying to soften and sink, thereby correcting the inclination of the building. Purpose: Because the foundation pile data of inclined buildings are often distorted or missing in actual engineering, it is difficult to accurately grasp the actual length of the foundation pile and the exact position of the pile tip, so the pile tip disturbance is often not implemented accurately; in addition, when the pile diameter is large Or when the soil at the pile tip is coarse-grained soil, the disturbance effect at the pile tip is very poor; when the bearing capacity of the foundation pile is dominated by pile side friction, the rectification period is long and the rectification effect is poor

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