Jacking and deviation rectifying construction method for multi-layer concrete building with raft foundation

Abstract

The invention discloses a jacking and deviation rectifying construction method for a multi-layer concrete building with a raft foundation. The jacking and deviation rectifying construction method comprises the following steps that firstly, temporary steel sleeves are vertically arranged on the periphery of a raft in a building settlement area in a penetrating mode; secondly, a permanent steel sleeve is arranged in the temporary steel sleeve in a penetrating mode; thirdly, the temporary steel sleeve is taken out, and a generated gap is backfilled; fourthly, a pile hole is drilled in the permanent steel sleeve, a reinforcement cage is placed, and concrete is poured; fifthly, a wedge-shaped groove is formed in the raft plate, and then an extension plate is arranged in a sleeving mode to be connected with the raft plate; 6, the extension plate, the raft plate and the building are jacked through a jack hydraulic device; and seventhly, the extension plates and the reinforcing piles are anchored, then grouting, filling and compacting are conducted, and jacking deviation correction of the concrete building of the raft foundation is completed. The reinforcing piles, the extension plates and the jack hydraulic devices are additionally arranged, the extension plates, the raft plates and the building are driven to be jacked through the jack hydraulic devices, an original foundation soil layer of the building is not disturbed during jacking deviation correction, and jacking deviation correction of the raft plate foundation multi-layer concrete building is achieved.

Description

technical field [0001] The invention belongs to the technical field of lifting deviation correction of concrete buildings, and in particular relates to a construction method for lifting deviation correction of multi-layer concrete buildings on a raft foundation. Background technique [0002] In the existing reinforced concrete raft foundation buildings, some buildings will have uneven settlement due to rainwater erosion of the foundation or external interference. If the differential settlement is too large, it will cause additional stress to the corresponding superstructure of the building. When the limit is reached, the building will be cracked, tilted or even destroyed. [0003] In order to prevent the building from continuing uneven settlement, the commonly used rectification methods currently include soil digging and static pressure pile rectification, but the above methods all require manual earth digging below the foundation raft. The unfavorable factor of large distu...

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Problems solved by technology

[0002] In the existing reinforced concrete raft-based buildings, some buildings will have uneven settlement due to rainwater erosion of the foundation or external interference. If the differential settlement is too large, additional stress will be generated on the corresponding upper structure of the building. When the limit is reached, the building will crack, tilt or even break

[0003] In order to prevent uneven settlement of buildings, the commonly used correction methods include soil digging and static pressure piles. However, the above methods require manual digging of soil below the foundation raft, which has the disadvantage of large construction area and damage to the original Unfavorable factors of large foundation soil disturbance

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