Construction method for narrow-base single-stand-column stepped foundation
A technology of foundation construction and narrow foundation sheet, which is applied in the direction of foundation structure engineering and construction, and can solve problems such as the difficulty of installing and fixing the anchor bolt group, the large and unstable span of the reinforcement cage of the foundation column, and the reduction of the number of steel beams and steel pipes used, etc. Achieve high rigidity and stability
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[0038] Embodiment: A construction method for a narrow foundation single-pillar step foundation, including the following specific steps:
[0039] A. Perform foundation pit inspection and pit bottom trimming: use theodolite to nail the auxiliary corner piles and bisecting piles at the corners of the foundation pit before excavation, and operate the instruments to stake out the angle bisectors and pit corners. Trim the elevation of the bottom of the pit to the design range, and then pour the concrete cushion. The elevation of the bottom of the pit is calculated from the designed center pile elevation plus or minus the foundation lift value to the top of the foundation plus the full height of the foundation to the bottom of the pit. The corner tower needs Considering the increase of the pre-height value, ensure the elevation of the cushion during the cushion casting process, maintain the level of cushion production, reduce the height difference of the cushion, and use wooden strips to...
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