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Construction Technology of Frozen Shaft and Wall in Soft Rock Formation

A construction process and technology of freezing wells, which are applied in wellbore lining, well sinking, and shaft equipment, etc., can solve the problems of inability to construct, increase the thickness of the well wall, and increase the construction cost, so as to reduce the construction cost, reduce the thickness of the inner wall, reduce the The effect of saving concrete

Active Publication Date: 2017-08-25
BEIJING CHINA COAL MINE ENG CO LTD
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Problems solved by technology

According to this design principle, the thickness of the shaft wall is positively correlated with the depth and the diameter of the well. Due to the increase in the depth of the shaft and the expansion of the diameter of the shaft in recent years, the thickness of the shaft wall has increased significantly, and the construction cost has greatly increased. Continuously increasing, the thickness of the well wall has a tendency to increase until it is impossible to construct

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  • Construction Technology of Frozen Shaft and Wall in Soft Rock Formation
  • Construction Technology of Frozen Shaft and Wall in Soft Rock Formation
  • Construction Technology of Frozen Shaft and Wall in Soft Rock Formation

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Embodiment Construction

[0034] In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0035] like Figure 1~3 Shown, adopt the present invention to carry out construction to the freezing wellbore well wall of soft rock stratum area, comprise the steps:

[0036] (1) Research and analyze the geological data provided by the geological and design departments, determine the distribution of geological layers such as aquifer 1 and water-resisting layer 2 in the formation, and the properties of each geological layer, and form a research on the properties of the formation according to the depth of the frozen section of the wellbore Report, the properties of each stratum should be explained in detail in the research report to meet the needs of well wall design. According to the above research report, the construction personnel will design the frozen wellbore well wall in se...

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Abstract

The invention discloses a construction process of a frozen wellbore wall in a soft rock formation, which comprises the following steps: (1) shaft wall design; (2) outer wall construction; (3) inner wall construction; (4) shaft wall grouting. The invention can greatly reduce the thickness of the well wall, reduce the construction cost, speed up the well completion speed, and is safe and reliable.

Description

technical field [0001] The invention relates to the field of frozen shaft construction, in particular to a construction process for freezing shaft walls in soft rock formations. Background technique [0002] The current frozen shaft wall adopts double-layer shaft wall structure design, the outer shaft wall load is calculated according to the freezing pressure, the inner shaft wall load is designed according to the water pressure of the static water level on the ground, the overall shaft wall load is checked according to the water and soil pressure, and the special formation design The negative friction effect is properly considered in the process. According to this design principle, the thickness of the shaft wall is positively correlated with the depth and the diameter of the well. Due to the increase in the depth of the shaft and the expansion of the diameter of the shaft in recent years, the thickness of the shaft wall has increased significantly, and the construction cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D1/00E21D5/04
Inventor 王建平刘晓敏李宁赵玉明李昆高伟许舒荣郭垒王恒叶玉西陈红蕾石红伟刘伟民杨明红温汉宏李林姜国静张基伟王楷赵一帆张继恒周可发王龙
Owner BEIJING CHINA COAL MINE ENG CO LTD
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