A Construction Method for Transforming Dewatering Wells with Empty Pile Sections of Rotary Drilling Cast-in-situ Pile

Abstract

The invention relates to the technical field of construction methods, and discloses a construction method for transforming a dewatering well with a rotary-dug cast-in-place pile empty pile section, including dewatering well parts and a pumping device; the part after the rotary-dug pile hole and concrete pouring is set as an engineering pile The space inside the pile hole above the top of the concrete is set as an empty pile section, and the concrete part is the engineering pile. After the concrete is solidified, the dewatering well is put into the pile hole, and the groundwater in the foundation pit is higher than the top of the engineering pile. It will infiltrate into the dewatering well parts. After filling the gravel and washing the well, you only need to pump out the water in the dewatering well parts to ensure that the construction will not be hindered by the high groundwater level in the foundation pit. The pile section is used to place dewatering well parts, and the process of obtaining engineering piles by rotary digging pile holes is combined with the process of placing dewatering well parts, reducing repeated procedures, saving a lot of costs and shortening the construction period of deep and large foundation pits.

Description

technical field [0001] The patent of the present invention relates to the technical field of construction methods, in particular, to a construction method for transforming dewatering wells with empty pile sections of rotary-dug cast-in-place piles. Background technique [0002] In order to provide a good dry construction environment for foundation pit excavation construction and foundation floor structure construction; at the same time, to drain the groundwater in the foundation pit and make the soil layer in the pit dry and consolidate, it is necessary to set a dewatering well during the excavation process of the foundation pit; and pile holes After making engineering piles, there will be a section of empty piles left. [0003] At present, engineering piles are drilled from the ground to the bottom of the hole, and the pouring concrete of engineering piles is only poured into the bottom of the foundation pit, that is, the following part of the design elevation. [0004] In...

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Problems solved by technology

[0004] In the prior art, an empty pile section will be left after the pile hole is made into an engineering pile. It is unsafe to leave the empty pile section on the ground, and a falling accident may occur; the empty pile section occupies the ground, which reduces the work of subsequent machinery and personnel during construction. area; the remaining mud in the empty pile section needs to be extracted with equipment, and then backfilled with slag, which is expensive, troublesome to deal with, and has a long construction period; before excavating the first layer of soil in the foundation pit, it is necessary to set up a dewatering well to check the water level of the foundation pit Precipitation, making pile holes separately to place well parts using dewatering takes a long time

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