Construction method of existing building anti-floating system based on embedded self-propelled anchor

Abstract

The invention relates to the field of anti-floating technology of existing buildings, and discloses an anti-floating system for existing buildings based on embedded self-advancing anchors and a construction method thereof, including anchor groups applied to anti-floating floors of existing buildings, and anchor groups It includes multiple self-advancing anti-floating anchors installed at 40-75°. The self-advancing anti-floating anchors in the anchor group are arranged in a matrix, which can far meet the design requirements and can resist horizontal disturbances. Reduce the displacement of the building in the horizontal direction; at the same time, the anti-floating management method combining self-propelled anti-floating anchor rods and pressure relief devices can be used to effectively strengthen the anti-floating slab, restore the damaged part of the anti-floating slab, And the filling of voids and gaps under the anti-floating slab; and when designing the distribution density of the self-advancing anti-floating anchor rods, the pressure-reducing effect of the pressure relief device is also fully considered to ensure effective control of the problem of floating existing buildings. It can also reduce the amount of self-propelled anti-floating anchor rods.

Description

technical field [0001] The invention relates to the field of existing building anti-floating technology, in particular to a construction method of an existing building anti-floating system based on embedded self-advancing anchor rods. Background technique [0002] When the self-weight of the building and the soil covering the bottom cannot offset the buoyancy generated by the groundwater, the bottom of the existing building is likely to float up due to the action of water pressure, which will cause the supporting structure of the building to be deformed under compression. In severe cases, the supporting structure will be destroyed, affecting the stability of the building; Moreover, since the post-pouring belt, construction joints or cracks formed in the later stage of the raft are weak links, the bottom of the raft is subjected to water pressure for a long time, and the post-pouring belt, construction joints or cracks of the raft further develop, resulting in the raft of the ...

AI Technical Summary

Problems solved by technology

[0002] When the self-weight of the building and the soil covering the bottom cannot offset the buoyancy generated by the groundwater, the bottom of the existing building is likely to float up due to the action of water pressure, which will cause the supporting structure of the building to be deformed under compression. In severe cases, the supporting structure will be destroyed, affecting the stability of the building; Moreover, since the post-pouring belt, construction joints or cracks formed in the later stage of the raft are weak links, the bottom of the raft is subjected to water pressure for a long time, and the post-pouring belt, construction joints or cracks of the raft further develop, resulting in the raft of the basement of the existing building. Or cracking and water seepage, there is a safety hazard

Moreover, most of the existing anti-floating control methods use the method of drilling pressure relief to release the water pressure of the anti-floating floor of the building, and then apply anchor rods for anti-floating treatment. The distribution of anchor rods is unreasonable. When the subsequent groundwater level rises, Especially in extreme weather such as heavy rain and other environments, the water pressure will always have a pressure effect on the floating floor, and the problem of cracking and leakage of the floating floor has not been solved.

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