Method for installing steel pipe column under cover and excavation top-down method in segmental-locating mode

Abstract

The invention discloses a method for installing a steel pipe column under the cover and excavation top-down method in a segmental-locating mode. The method comprises the following steps that 1) an underground continuous wall is constructed and a temporary support is arranged, and earthwork is excavated to a preset elevation; 2) the steel pipe column is divided into a top steel pipe column, a bottom steel pipe column and a plurality of middle segment steel pipe columns according to the height of the headroom of the negative one-story; 3) the steel pipe column is installed in the segmental-locating mode, construction of the top steel pipe column is firstly finished, and then construction of the bottom steel pipe column is finished; 4) the first segment of the middle segment steel pipe columns is fixedly connected with the bottom steel pipe column, the rest of the middle segment steel pipe columns are fixedly connected in sequence from bottom to top, and the last segment of the middle segment steel pipe columns is fixedly connected with the top steel pipe column; 5) concrete is poured in the steel pipe column, the temporary support is detached, and construction is finished. Through segmental-locating installation of the steel pipe column, the construction problem of conflict of a building envelop and the vertical support is solved, construction quality is guaranteed, structure safety is guaranteed, and meanwhile construction speed is quickened.

Description

technical field [0001] The invention relates to a construction method for a steel pipe column, in particular to a construction method for erecting a steel pipe column after a cover-excavation process for deep foundation pit engineering. Background technique [0002] With the rapid development of urban underground engineering, deep foundation pit engineering is also developing in the direction of ultra-deep, ultra-large, complex, and multi-form. The construction technology is becoming more and more complicated and the construction difficulty is gradually increasing. Due to the influence of the above-ground environment, underground transportation projects are increasingly adopting the cover-excavation process. During the construction process of the deep foundation pit with the cover-excavation process, when the enclosure structure adopts the form of an underground diaphragm wall, the two adjacent structures When the middle piles of the vertical support structure and the ground...

AI Technical Summary

Problems solved by technology

Due to the influence of the above-ground environment, underground transportation projects are increasingly adopting the cover-excavation process. During the construction process of the deep foundation pit with the cover-excavation process, when the enclosure structure adopts the form of an underground diaphragm wall, the two adjacent structures When the middle piles of the vertical support structure and the ground connection wall are occluded or overlapped, the middle piles and the ground connection wall cannot be constructed at the same time, which will affect the normal construction of the structure

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