Construction method for building water well with the polypropylene flange well pipe

Abstract

The invention relates to a flange type polypropylene well pipe and a method for constructing well in technical field of water conservancy project. The upper end of the flange type polypropylene well pipe is provided with a nut and a flange, and the lower end thereof is provided with a screw thread; a pipe body is arranged between the nut and the screw thread which are completely inosculated with each other; well pipes are in even joint and tightly srewed with each other by the screw threads and the nuts; the pipe wall of a filter well pipe is provided with elliptic water seepage holes. The well pipe adopts a method of suspending an upper well pipe to construct, taking a flange of each well pipe as a constructing node. In the process of installing the well pipes, steel pates are used for clamping the flanges of the well pipes which are sequentially connected with the screw threads and the nuts; then, a hand chain hoist is used for providing pull force to the whole well pipe to move downthe whole well pipe and so forth. When a well is discarded as worthless, well pipes can be taken out one by one conveniently and can be recycled and reused, thereby achieving the purpose of saving resource and protecting environment.

Description

technical field [0001] The invention relates to a construction method in the field of water conservancy engineering, in particular to a polypropylene flange-type well pipe and a construction method for building a water well with it. Background technique [0002] The basic construction of farmland water conservancy plays a vital role in China's agricultural production and development. Most of the crops in our country grow on irrigated fields. Therefore, farmland irrigation is the lifeblood of China's agricultural production. A large number of wells are built on farmland. It can improve the comprehensive production capacity against natural disasters, ensure increased food production and ensure harvest in dry seasons; similarly, in some heavily polluted areas, due to the aggravation of surface water pollution, deep-water wells are chosen to be drilled in small and medium-sized cities and rural areas to ensure the health of drinking water for residents; In some breweries, chemic...

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Problems solved by technology

[0002] The basic construction of farmland water conservancy plays a vital role in China's agricultural production and development. Most of the crops in our country grow on irrigated fields. Therefore, farmland irrigation is the lifeblood of China's agricultural production. A large number of wells are built on farmland. It can improve the comprehensive production capacity against natural disasters, ensure increased food production and ensure harvest in dry seasons; similarly, in some heavily polluted areas, due to the aggravation of surface water pollution, deep-water wells are chosen to be drilled in small and medium-sized cities and rural areas to ensure the health of drinking water for residents; In some breweries, chemical plants and oil refineries, etc., which require higher water quality, deeper water intake wells will also be drilled to ensure the quality of water intake and smooth production. Concrete, due to the heavy weight and low strength of the concrete well pipe, it is easy to cause the well pipe to squeeze and collide with each other during the handling of the concrete well pipe, which will cause cracks or even breakage of the well pipe; during the construction process, the lower part of the well hole is used The steel cable suspension method is used for construction, and the well pipes are stacked upwards on the well plate in turn until the depth requirements of the well design are reached. After the construction is completed, the steel cables must be pulled out from the bottom of the well pipes, which is inconvenient and labor-intensive; When the well pipes are stacked upward along the sidewall of the wellbore, the well pipes at the bottom of the wellbore bear almost all the weight of the upper well pipes. Therefore, if the quality of the well pipes is unqualified or damaged during construction, it If the strength does not meet the requirements, the bottom well pipe will be crushed. Due to the huge gravity of the upper well pipe, the huge downward impact will crush the well pipe one by one, forming a chain reaction until the upper well pipe, All sink into the bottom of the well, resulting in engineering accidents; during the use of the well, due to the low strength of the concrete well pipe and the lack of connection between the upper and lower well pipes, the overall performance is poor, so it is easy to cause the inclination and dislocation of some well pipes and the well The hole collapsed, causing the well to be scrapped and affecting its service life

[0003] Found through literature retrieval to prior art, patent application number 02205323.9 proposes reinforced concrete well pipe, patent No. 200520008909.8 prestressed steel well pipe, its shortcoming is that the well pipe quality is big, easily damaged, manufacturing engineering is complicated, and cost is higher, and During the use of water wells, the corrosion of steel bars leads to concrete cracking, resulting in a decrease in the strength of well pipes, which seriously affects the service life of water wells

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