Reconstruction method of subsidence hydraulic structure

Abstract

The invention provides a method for rebuilding a sunk hydraulic structure. The method comprises the following steps: step 1, underwater exploration; 2, site treatment; 3, a construction platform is built; 4, designing a pile foundation scheme; 5, pile foundation construction is implemented according to the pile foundation scheme provided in the step 4; the pile foundations penetrate through the subsidence building and form a whole with the subsidence building; the pile foundation comprises a first-stage pile foundation and a second-stage pile foundation; 6, a foundation building surface is formed, specifically, the top of the subsidence building is cleaned, underwater self-leveling concrete is leveled, a plane is formed, and the foundation building surface is built on the top of the subsidence building in combination with a pile foundation and an upper load; in the whole process, large-range cofferdam construction, deep foundation pit construction, dismantling and other key steps of a traditional method are avoided, the subsidence building is changed into a favorable foundation, breakthrough is achieved, and the defects of a common traditional scheme are overcome.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a reconstruction method of a submerged hydraulic structure. Background technique [0002] Due to the defects of the foundation, the building needs to be reinforced to ensure the safety and usability of the project. In severe cases, the original building needs to be demolished for reconstruction. There are many cases of foundation defects, such as collapsible, expansive soil, the original building foundation does not fall on a good bearing layer, etc., or the soil body is washed by water flow, and the silty sand geology is damaged by infiltration. [0003] The collapsible loess of the building foundation was not fully replaced and treated during the construction period. During the operation period, it was affected by factors such as pipeline leakage and changes in the surrounding groundwater level, which resulted in water molecules wedging between soil particles, ...

AI Technical Summary

Problems solved by technology

[0006] 1. Because the foundation soil is soft, empty, and there are seepage channels, there are risks in the surrounding buildings, such as figure 1 Subsidence shown with local defects;

[0007] 2. The building needs to be rebuilt, the bearing capacity of the foundation is weak, and the risk of difficulty in demolition and reinforcement of the original subsidence building is high. The conventional method needs to build cofferdams, supports and anti-seepage systems first, which requires a large investment and a long period

[0013] 3. A large amount of construction waste will be formed after the demolition, which cannot play its due role on the original structure;

[0014] 4. The huge vacancy formed after the demolition, the deep foundation pit, cofferdam support and anti-seepage safety hazards are great;

[0015] 5. The pit needs to be backfilled with materials. If all the soil is backfilled, it will be difficult to roll because of the small space; if all the concrete is backfilled, the cost will be higher

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