Deep foundation pit underground drainage pre-buried well grouting plugging construction method

Abstract

The invention discloses a deep foundation pit underground drainage pre-buried well grouting plugging construction method. The method is characterized by comprising the following steps of a, manufacturing a plugging circular steel plate according to an inner diameter of the pre-buried well, welding a drain pipe, and making a grouting pipe; b, winding an isolation filler around the outer edge of anupper opening of the pre-buried well; c, adding gravel in a pre-buried well, installing a grouting pipe and gravel to a predetermined position; d, installing the plugging circular steel plate, and welding the plugging circular steel plate to the grouting pipe, the pre-buried pipe; e, the grouting pipe and the drain pipe to be high in height to the underground water level equilibrium position; f, grouting, secondary grouting; g, cutting the grouting pipe, the drain pipe, the pre-buried pipe spare section, roughening the edge structure concrete; and h, and pouring concrete for the second time. The drainage pre-buried well plugging system has the advantages that the structure is simple, the operation is convenient, the engineering quality is safe and reliable, the grouting floral pipe is horizontally positioned at the grouting part of the pre-buried well bottom hole, the average distribution of the slurry during grouting is facilitated, the isolation filling material is arranged, when thespare section steel manufacturing facility is removed, the whole structure of the secondary filling concrete is completely combined after roughed.

Description

technical field [0001] The invention relates to a grouting sealing method for a foundation pit drainage well, in particular to a grouting sealing construction method for a deep foundation pit buried drainage pre-buried well. Background technique [0002] Deep foundation pit buried drainage grouting sealing structure When deep foundation pits are constructed, the enclosure structure is generally adopted to form a closed enclosure and water-tight curtain for the foundation pit, and then earthwork excavation and structural construction are carried out in the foundation pit, and the construction excavation When the bottom of the foundation pit encounters the impact of groundwater in the sand layer, it is very difficult to make holes in the sand layer aquifer for the dewatering well repair construction. At the same time, artificial mud is required to protect the well hole wall, which also has a certain impact on the engineering environment. Different numbers of diversion pre-buri...

AI Technical Summary

Problems solved by technology

Although the flange cover is installed by bolts for easy disassembly and reuse in this technical solution, it relies on a relatively airtight sealing effect during the solidification of the grout, which has poor stability, many uncertain factors, and hidden dangers in construction.

[0004] Therefore, there are above-mentioned inconveniences and problems in the known deep foundation pit buried drainage well grouting sealing method.

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