Straightening and strengthening method for shallow-buried foundation buildings of inclined disaster-damaged box rafts

Abstract

The invention provides a method for centralizing and strengthening an obliquely damaged pontoon raft shallow-buried foundation building. The method comprises the following steps: step a, prospecting the oblique condition and the oblique reason of a building, and determining a settlement solution; step b, building a multifunctional deep well in a foundation of the building; step c: removing soil from the multifunctional deep well in order to form a plurality of horizontal holes in a supporting layer under the foundation, so that the pressure and stress of the basement are concentrated, the soil property of the foundation is loosened, and the supporting force is declined, and then building is slowly sunk, thereby the purpose of centralizing and strengthening is achieved; and step d, monitoring the construction and confirming the working progress until the oblique centralization is finished. About the pontoon raft shallow-buried foundation building with high volume and wide scale, the building can be saved since the building is inclined, sunken and cracked for various faults and disaster-caused damages, and the service life is prolonged; thereby the purposes of protecting the national society property and stabilizing people live are achieved.

Description

technical field [0001] The invention relates to a building rectification technology. Background technique [0002] The invention is an effective patented technology for rescuing, rectifying and reinforcing the shallow-buried foundation buildings (structures) of box rafts caused by inclination, subsidence, crack damage and other diseases caused by survey, design, construction mistakes and disaster damage. [0003] The reasons for the inclination, subsidence, crack damage and other diseases of the shallow-buried foundation buildings (structures) of box rafts include at least: [0004] 1. In the survey, design and construction of new projects, due to various reasons, the buildings (structures) are tilted, cracked, subsidence and lose their normal functions during construction or use; Figure 2A As shown, the inclination is caused by the eccentricity of the building load; Figure 2B As shown, due to survey errors, there is a weak soil layer of silt soil with uneven thickness un...

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Problems solved by technology

[0004] 1. In the survey, design and construction of new projects, due to various reasons, the buildings (structures) are tilted, cracked, subsidence and lose their normal functions during construction or use; Figure 2A As shown, the inclination is caused by the eccentricity of the building load; Figure 2B As shown, due to survey errors, there is a weak soil layer of silt soil with uneven thickness under the foundation of the building, which will also cause the building to tilt

[0005] 2. In the construction of subway or industrial roadway in the city, the buildings (structures) in the subsidence affected area on the ground will be tilted, and the excessive subsidence will be damaged; if Figure 2C As shown, building a subway near a building may also cause the building to tilt

[0006] 3. After the building (structure) is completed, it is found that there are undiscovered soil holes, tombs, civil air defense projects, limestone caves, etc. in the bearing layer or the foundation of the underlying layer, which may cause the building (structure) to sink unevenly or even oblique cracking; as Figure 2D As shown, the subsidence of the underground cavity existing in the foundation of the building will also cause the building to tilt

[0007] 4. In disasters such as earthquakes, floods, ice and snow, landslides, ground subsidence, etc., although serious damage occurs, it is proved by inspection that there are still damaged industrial and civil buildings (structures) and chimneys and water towers that have continued use value after rescue and reinforcement , bridge piers and other structures; such as Figure 2E As shown, the flood has hollowed out the base soil of the building, which will cause the building to tilt; Figure 2F As shown, the sand layer in the foundation liquefies during the earthquake and is sprayed out of the ground to form a sandblast pile. The change in the thickness of the sand layer will also cause the building to tilt

[0008] 5. During the manual treatment of large-scale backfilling sites, a large amount of rubbish, boulders, stones, concrete blocks, tree roots, tree trunks and other debris were buried, resulting in uneven hardness and softness of the foundation. , due to various factors such as water immersion, earthquakes, floods, etc., it has obvious uneven settlement damage; Figure 2G As shown, the boulders and obstacles on the side of the foundation of the building lead to uneven softness and hardness of the foundation, and the building is tilted due to factors such as water immersion

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