Method for jacking up and rectifying buildings/structures with micro piles combined with geotechnical cloth bags

Abstract

A method for rectifying slant of buildings through geotechnical cloth bags combined with mini pile jacking comprises the steps of (1) drilling holes, (2) making the geotechnical cloth bags, (3) placing pile bodies, (4) sealing the holes and (5) injecting water. The method has the advantages that the foundations of the buildings in the slant rectifying process are prevented from being damaged, and the repairing work is avoided; the pile bodies can be made in advance, and the pile forming efficiency is high; padding blocks and powder are prevented from being separated in the pile forming process, and the pile forming quality is good; water is injected through water guiding pipes, geotechnical cloth guides water, and water permeates sand particles, so that the pile bodies evenly expand in a controlled mode. According to the practice situation of the slant rectifying engineering of dormitory buildings of the Fengxiang Jidong cement plant, through the method, the pile forming efficiency is improved by 50%, and through in-situ testing, the radial expansion rate of the mini piles is 1.2 times that of mini piles which are not formed through the method.

Description

technical field [0001] The invention relates to the technical field of engineering, in particular to a method for jacking up and rectifying buildings / structures with micro piles combined with geotechnical cloth bags. Background technique [0002] There are still deficiencies in the subject research and construction technology of micropile jacking / structure foundation in natural foundations: 1) The expansion process of quicklime piles is mainly divided into two steps: digestion and carbonization, and the digestion process requires H 2 O participates, the carbonization process requires CO 2 Participation, in a certain depth range below the formation, when the moisture content of the soil layer is high, the quicklime pile can complete the digestion process, but the soil layer contains CO 2 The amount of gas is so small that it cannot complete the carbonization of the digested quicklime (the process of increasing the strength); 2) During the construction of traditional manual c...

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Problems solved by technology

[0002] There are still deficiencies in the subject research and construction technology of micropile jacking / structure foundation in natural foundations: 1) The expansion process of quicklime piles is mainly divided into two steps: digestion and carbonization, and the digestion process requires H 2 O participates, the carbonization process requires CO 2 Participation, in a certain depth range below the formation, when the moisture content of the soil layer is high, the quicklime pile can complete the digestion process, but the soil layer contains CO 2 The amount of gas is so small that it cannot complete the carbonization of the digested quicklime (the process of increasing the strength); 2) During the construction of traditional manual compacted quicklime piles, the pile quality is controlled by factors such as the mixing degree of the mixture and the number of compaction hits. During the key blanking process, due to the lack of special equipment, the mixed fillers are all poured into the drilling hole. Since the particle size and weight of the mixed fillers are different, the fillers have been separated during the falling process, especially when the hole wall is wet, the fine material Components are easy to stick to the hole wall; 3) quicklime piles are used for jacking and rectifying buildings / structures, and a measure to control expansion is urgently needed to keep the whole process of jacking and rectifying within a controllable range; 4) some traditional Micro-pile jacking methods, such as static pressure piles, are limited by the foundation form. For example, they cannot be applied to unreinforced extended foundations and strip foundations. Technology capable of compacting and strengthening soil

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