Construction method of vacuum tube well dewatering system
A construction method and technology of vacuum tubes, which are applied in infrastructure engineering, construction and other directions, can solve the problems of high noise, large footprint of vacuum pump equipment, easy freezing of circulating water, etc., and achieve the effects of convenient observation, good effect and low cost.
Active Publication Date: 2016-08-03
BEIJING G&M ENG CONSTR CO LTD
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Problems solved by technology
[0004] The present invention aims to provide a construction method for a vacuum tube well dewatering system to solve the imperfect wellhead sealing construction technology and construction method in the prior art; the vacuum pump equipment occupies a large area and has high noise; During the intermittent period, the circulating water is very easy to freeze
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Embodiment Construction
[0040] see Figure 1-Figure 6 , the construction method of a kind of vacuum tube well dewatering system of the present invention is characterized in that, comprises the following steps:
[0041] (1) Set up a reverse circulation drilling rig;
[0042] (2) Adjust the drilling rig to the designated position, start the drilling rig, drill the drill bit to the required depth, and drill the dewatering well;
[0043] (3) Place a steel bracket at the wellhead of the dewatering well, and lower the well pipe 18 section by section by hanging the bottom with the steel cable; after the well pipe 18 is placed at the bottom of the well, pull out the steel cable;
[0044] (4) Righting the well pipe 18, filling the outside of the well pipe with filter material, one is to fix the well pipe, and the other is to ensure that the water in the formation can flow into the well pipe.
[0045] (5) Use an air compressor to wash the well for 8 hours;
[0046] (6) Install wellhead sealing structure;
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A construction method for a vacuum tube well dewatering system includes the steps: drilling a well; placing a steel supporting frame at a wellhead position, and using a steel rope to gradually lower well tubes; after the well tubes are put at the bottom of the well, withdrawing the steel rope; straightening the well tubes, and filling with filler materials; using an air compressor to flush the well; mounting a wellhead sealing structure; building a round well chamber around the wellhead sealing structure, and enabling elevation of the well chamber to be flush with the ground; peripherally sealing a cast iron well lid with asphalt and compacting; mounting a water pump, a vacuum pump and a water tank; during construction in winter, adding an anti-freeing agent into the water tank. The construction method has the advantages that high wellhead airtightness is achieved; a water level observation hole of a flange is connected with a ball valve to make it convenient for water level observation; a vacuum pump water tank is arranged above a vacuum pump by the aid of an angle iron supporting frame, so that site space is effectively used; effectiveness is realized by taking low-cost sodium nitrite solution as the anti-freezing agent.
Description
technical field [0001] The invention relates to the field of civil engineering, in particular to a construction method of a vacuum tube well dewatering system, which is mainly used for lowering water levels during underground engineering construction. Background technique [0002] In the process of underground engineering construction, how to deal with groundwater is a big problem. The main principle of the tube well dewatering is to construct the dewatering well so that the groundwater will be collected into the well under the action of gravity, and then the groundwater will be pumped out by the water pump, so as to achieve the purpose of removing the groundwater. [0003] At present, vacuum tube well dewatering has been used more and more. The main principle of dewatering engineering is to reduce the groundwater level in the pumping well, so that there is a head difference between the water level in the formation and the water level in the pumping well. Under the action o...
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IPC IPC(8): E02D19/10
Inventor 任汉锋赵瑞锋薛彦东
Owner BEIJING G&M ENG CONSTR CO LTD