Construction method for temporarily replacing foundation pit crossing concrete pipe with steel pipe in deep foundation pit construction

Abstract

The invention discloses a construction method for temporarily replacing a foundation pit crossing concrete pipe with a steel pipe in deep foundation pit construction. The construction method includes the steps of (1) constructing a bored pile concrete beam adjacent to a pipeline; (2) blocking the upstream of the pipeline; (3) chiseling away a concrete drainage pipe; (4) installing steel pipe bricks to block gaps; (5) grouting and reinforcing soil around the concrete drainage pipe; and (6) constructing a reinforced concrete buried culvert. According to the construction method for temporarily replacing the foundation pit crossing concrete pipe with the steel pipe in deep foundation pit construction, the upstream of the pipeline is temporarily plugged, an existing pipeline is chiseled away in a window creating period, the steel pipe is inserted into a concrete pipeline according to the characteristics that the steel pipe is light, high in strength, good in integrity and beneficial to machining and transportation, plugging is well conducted, then upstream plugging is removed, and the pipeline is unblocked, so that on the premise that the safety of a foundation pit is guaranteed, a construction surface of follow-up construction is quickly created, so that the purposes of saving construction period and cost are achieved.

Description

technical field [0001] The invention relates to the technical field of subway station construction, in particular to a construction method for temporarily replacing concrete pipes spanning foundation pits with steel pipes during deep foundation pit construction. Background technique [0002] Before the construction of the main structure of the subway station, all kinds of pipelines in the road will be moved to both sides of the main foundation pit, which will have a certain impact on the subsequent construction of the auxiliary structures, especially the reinforced concrete drainage pipelines with deep buried depth and large diameter , the relocation is difficult, the relocation period is long, the path is limited, and the method of suspending the protection pipeline across the foundation pit is also difficult to realize because of its own weight. During the construction of ancillary structures, it would take a lot of time and economic cost to modify or suspend such pipeline...

AI Technical Summary

Problems solved by technology

[0002]Before the construction of the main structure of the subway station, various pipelines in the road will be relocated to both sides of the main foundation pit, which will have a certain impact on the subsequent construction of the auxiliary structure. Especially for reinforced concrete drainage pipelines with deep buried depth and large diameter, it is difficult to relocate, the relocation period is long, and the path is limited. The method of suspending the protection pipeline across the foundation pit is also difficult to realize due to its own weight.

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