Rotary excavating cast-in-place pile hole water leakage plugging method

Abstract

The invention relates to the technical field of rotary excavating cast-in-place pile construction, and discloses a rotary excavating cast-in-place pile hole water leakage plugging method. The method comprises the following construction steps that S1, core pulling is conducted on a cast-in-place pile, and a core rod is taken out to form a core pulling hole; S2, the core rod with the length of 1 m is taken, and a dry kelp layer is wound around the core rod and is put into the core pulling hole; S3, a galvanized steel pipe is placed in the core pulling hole, and the bottom end of the galvanized steel pipe abuts against the upper end of the core rod; S4, the dry kelp layer absorbs water and expands, so that the core pulling hole stops water, and then expansion cement paste is injected throughthe galvanized steel pipe; S5, a valve is arranged at the top end of the galvanized steel pipe, and when leakage still exists after the cement paste is injected into the core pulling hole, the valve is closed after the strength of the cement paste is reached; and S6, concrete is poured above the cast-in-place pile to form a bearing platform, the upper surface of the bearing platform is sunken downwards to form a groove, and the top end of the galvanized steel pipe is exposed in the groove. According to the rotary excavating cast-in-place pile hole water leakage plugging method, the filling work after core pulling is completed, the problem of leakage of the core pulling hole is solved, the problem of high construction difficulty caused by compensation work after occurrence of leakage in subsequent construction is solved, and the construction cost is reduced.

Description

technical field [0001] The patent of the present invention relates to the technical field of rotary-dug cast-in-situ pile construction, in particular, it relates to a method for sealing the water leakage of the rotary-dug cast-in-situ pile hole. Background technique [0002] After the construction of the rotary-dug cast-in-place pile, in order to test the concrete strength and integrity of the pile body, the pile length, the thickness of the ballast at the bottom of the pile, and the properties of the rock and soil layer at the bottom of the pile, etc., a part of the cast-in-situ pile can be drilled by the core-pulling method as a core sample. The concrete cementation properties of the core sample, the type and uniformity of the aggregate, and the properties of the rock and soil layer at the bottom of the pile, etc., and the core sample was cut out for the compressive strength test, so as to realize the detection of the cast-in-situ pile. [0003] In the prior art solution, ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for sealing the water leakage of the hole of the rotary excavation cast-in-place pile, aiming to solve the problem in the prior art that the groundwater is poured backward from the core-pulling hole of the cast-in-place pile and cannot be grouted

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