Construction method for super vacuum dewatering well and well tube structure used in construction method

A construction method and technology of precipitation wells, applied in infrastructure engineering, soil protection, construction, etc., can solve the problems of reducing precipitation effect, vacuum degree attenuation, and unsatisfactory use and effect of precipitation technology, so as to reduce labor intensity , avoid vacuum degree attenuation, and improve the effect of precipitation

Inactive Publication Date: 2014-09-24
CHINA CONSTR FOURTH ENG DIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] With the existing vacuum precipitation technology, after the water level drops, air will enter the deep vacuum well, which will cause the vacuum degree to decay, thereby reducing the precipitation effect
Therefore, the existing precipitation technology is not satisfactory in use and effect

Method used

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  • Construction method for super vacuum dewatering well and well tube structure used in construction method
  • Construction method for super vacuum dewatering well and well tube structure used in construction method
  • Construction method for super vacuum dewatering well and well tube structure used in construction method

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Embodiment

[0028] During specific construction, such as image 3 As shown, vacuum pump 16 and water pump 13 are used to extract the air and groundwater in the well pipe 11 at the same time, so that the inside of the well pipe 11 is kept sealed to form a stable and continuous negative pressure of high vacuum degree (greater than 0.08MPa) that is not affected by underground engineering construction. The vacuum makes the groundwater continuously and rapidly collect into the well under the action of negative pressure and vacuum. The principle of the present invention is as figure 1 As shown, due to being vacuumed in the well pipe 11, a higher negative pressure vacuum is always maintained at the bottom of the well pipe 11, so that the groundwater level line 15 is as figure 1 As shown in the curve, it accelerates the discharge of pore water in the soil. The present invention can be as follows before precipitation figure 2 The negative pressure shown in the depth range of L below the...

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Abstract

The invention discloses a construction method for a super vacuum dewatering well and a well tube structure used in the construction method. The method comprises the following processes: measuring a well position, burying a mouth protecting tube, mounting a drilling machine, carrying well construction, drilling holes, cleaning holes for mud fluid displacement, descending a well tube, packing a filter material and cleaning the well. The method adopts the segmented well tube, ensures a permeable effect, isolates air from entering the super vacuum dewatering well, and overcomes the defect that the vacuum degree of a common vacuum deep well is reduced as air enters the well after the water level drops. During dewatering, the method can greatly improve the dewatering effect, reduce the engineering cost, accelerate the construction process, and reduce the labor intensity of workers. The process is easy to operate and master.

Description

technical field [0001] The invention relates to a construction method of a super-strong vacuum dewatering well and a well pipe structure used therefor, and belongs to the technical field of dewatering in building construction. Background technique [0002] During the rapid development of urban construction, there are more and more developments and applications of underground spaces such as building basements, underground shopping malls, and subway stations, and their depths are increasing, which further increases the depth and requirements for precipitation. [0003] In the existing vacuum precipitation technology, after the water level drops, air will enter the vacuum deep well, which will cause the vacuum degree to decay, thereby reducing the precipitation effect. Therefore, the existing precipitation technology is not satisfactory in use and effect. Contents of the invention [0004] The object of the present invention is to provide a super vacuum dewatering well const...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/10E02D3/10
Inventor 龙敏健陈静彭振峰黄韬
Owner CHINA CONSTR FOURTH ENG DIV
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