Water pressure jetting type well completion construction method of dewatering tube well

A construction method and downpipe technology, which is applied in infrastructure engineering, drilling with liquid/gas jets, construction, etc., can solve the problems of large equipment, large amount of engineering, economic efficiency and poor precipitation effect, etc., and achieve flexible construction, The effect of improving construction efficiency and reducing construction cost

Active Publication Date: 2016-05-04
POWERCHINA MUNICIPAL CONSTR GRP CO LTD
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Problems solved by technology

This method will have a larger engineering volume and use more large-scale equipment, and for this kind of decentralized water conservancy project, the economy and precipitation effect are relatively poor

Method used

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  • Water pressure jetting type well completion construction method of dewatering tube well
  • Water pressure jetting type well completion construction method of dewatering tube well

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Embodiment Construction

[0033] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0034] see figure 1 and 2 The invention discloses a hydraulic jetting type well-forming construction method of a downcomer well, comprising the following construction steps:

[0035] S1 Well Hole Positioning: Carry out setting-out positioning according to the well position design.

[0036] S2 Making the casing 1 and installing the flushing pipe 2:

[0037] The shape and structure of the casing is as follows: it is closed in the circumferential direction, and the two ends are open. On the side wall of the casing, a plurality of sets of communicating holes are evenly distributed along the circumferential direction. 1-1 structure, the distance between the communication hole at the bottom and the bottom of the casing is 0.15~0.20m;

[0038] T...

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Abstract

A water pressure jetting type well completion construction method of a dewatering tube well comprises steps as follows: S1, a well hole is positioned; S2, a protective barrel is produced, and jetting tubes are mounted; S3, a combined structure of the protective barrel and the jetting tubes is placed in the position of the well hole positioned in S1; S4, jetting hole forming operation is performed; S5, a water filtering well tube is mounted; S6, backfilling of an inverted filter material is performed; S7, the protective barrel and the two jetting tubes are pulled out of the well hole; S8, well washing is performed; S9, a submersible pump and a water outlet pipe are mounted, and test pumping is performed. The well completion construction method meets construction requirements of construction sites having various terrain conditions, the construction cost is reduced, and the construction efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of downfall tube well construction, and in particular relates to a hydraulic jet flushing well-forming construction method of a downfall tube well. Background technique [0002] Tube well dewatering is the most commonly used dewatering method in engineering construction. The so-called tube well dewatering means that a certain number of tube wells are arranged at a certain distance around the foundation pit of the proposed project and in the middle of the foundation pit, and water pumps are installed in the tube wells. It is a dewatering method that pumps groundwater so that the groundwater level in the foundation pit is always lower than the operation surface of the foundation pit. This dewatering method has the characteristics of large well spacing, good drainage effect, independent multi-well points, simple dewatering equipment and operation process, and low engineering cost. It is widely used in various d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/10E21B7/18
CPCE02D19/10E21B7/18
Inventor 林恩国张松华罗涛随路路
Owner POWERCHINA MUNICIPAL CONSTR GRP CO LTD
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