Construction method for pouring concrete pile by using telescopic guide pipe

Abstract

The invention relates to an underwater concrete pouring construction method, in particular to a construction method for pouring a concrete pile by using a telescopic guide pipe. At present, most of the underwater concrete pouring utilizes a concrete material gravity pouring mode, and defects such as intermittent pouring operation and pipe blocking exist in the construction. According to the technical scheme, the telescopic guide pipe provided with a bottom door and a sealable pipe body is adopted, a first batch of poured concrete is conveyed to the bottom of a pile hole, the bottom door is opened to release the concrete so as to seal the bottom, a conveying pump is used for continuously pumping and pouring, and meanwhile, the guide pipe is synchronously contracted along with the rise of the concrete surface until the pouring operation is completed. According to the construction method, the pressure in the pipe is controllable in the concrete pouring process, and the telescopic action of the pipe body is uniform and consistent when the guide pipe is lifted, so that the problems that in the prior art, due to the fact that a material pipe is split, the pouring operation is interruptedmany times, the interruption time is long, the construction efficiency is low, the process is difficult to control, and the engineering quality is affected are solved, and the quality problem of a pile foundation caused by concrete segregation, slag inclusion and the like is avoided.

Description

technical field [0001] The invention relates to a concrete pouring construction method, in particular to a construction method for pouring concrete piles with telescopic conduits. Background technique [0002] At present, most of the pouring construction of underwater concrete piles uses the method of pouring concrete along the conduit by its own weight, that is, a hopper with a lifting cover at the bottom is installed on the top of the pouring material pipe, concrete is preset in the hopper, and a hopper is placed at the upper end of the material pipe. The piston ball with the same diameter as the material pipe, when the amount of concrete reaches the bottom burial depth requirement, the cover is opened, and the concrete will quickly pour down into the pile hole under the action of gravity, and the piston ball will enter the water (or wall protection mud) in the pipe during the downward process Forced discharge from the bottom of the barrel. [0003] In actual construction...

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Problems solved by technology

[0003] In actual construction, affected by various factors such as the diameter of the conduit, the drainage effect of the piston sphere, the specific gravity of the retaining mud, the embedment depth of the end of the conduit, and the slump of the concrete, the above-mentioned operation method causes the concrete to be blocked, and the material pipe is easily blocked. Phenomenon; especially after the first batch of concrete materials are poured, sudden changes inside and outside the pipe may easily cause external water or mud pressure to penetrate into the pipe and mix with the concrete poured later, which greatly increases the difficulty of operation control and seriously affects the quality of the project

[0004] In addition, as the liquid level of the concrete material rises during the pouring process, the removal of the material pipe is time-consuming and laborious, resulting in multiple interruptions of the pouring operation, which not only prolongs the working time and reduces the work efficiency, but also the concrete pouring of two adjacent vehicles (buckets) There is an interval (in order to ensure the quality of the project, it is stipulated that the interval between two trucks of concrete shall not exceed 30 minutes), which will have a negative impact on the quality of concrete pouring to a certain extent, and even cause air chambers to form in the pipe, resulting in failure of pouring operations or broken piles, resulting in major economic loss

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