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A method of arranging vertical optical fiber in deep borehole and grouting and sealing the hole

A technology of optical fiber and grouting, which is applied in earthwork drilling, sealing/isolation, wellbore/well components, etc., and can solve problems such as surface deformation

Active Publication Date: 2019-07-16
INST OF KARST GEOLOGY CAGS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, conventional monitoring methods can only monitor surface deformation

Method used

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  • A method of arranging vertical optical fiber in deep borehole and grouting and sealing the hole
  • A method of arranging vertical optical fiber in deep borehole and grouting and sealing the hole
  • A method of arranging vertical optical fiber in deep borehole and grouting and sealing the hole

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Embodiment Construction

[0032] In order to facilitate the understanding of the technical solution of the present invention, the following combination Figure 1-9 For further explanation, the examples do not constitute a limitation to the protection scope of the present invention.

[0033] A method for arranging vertical optical fibers in deep boreholes and grouting and sealing the holes, comprising the following steps:

[0034] S1: Preparation before grouting: first carry out deep drilling, and after the drilling is completed, fix the first section of grouting pipe 4 to the drilling hole through the grouting pipe holder 8, such as Figure 8 As shown, the grouting pipe fixer 8 includes a base 81, a fixed shaft 82, a clamping rod 83, and a pre-tightening screw 84. The base 81 is flat, and the middle part of the base 81 has a hole. The short rod 22 is vertically fixed on the On the left side of the base 81, there are two clamping rods 83, the left ends of the two clamping rods 83 are sleeved on the fix...

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Abstract

The invention discloses a method for laying vertical fiber in a deep drillhole and performing grouting sealing, and belongs to the technical field of drilling detection. The method comprises the stepsof S1, preparation before grouting; S2, optical fiber hanging bucket installation; S3, grouting; S4, grouting pipe pulling. Accordingly, the distributed optical fiber sensing principle is adopted fordetecting deformation of all layers of rock-soil bodies surrounding the drillhole; for preparation before grouting, a grouting pipe goes deep into the drillhole through a winch, then the optical fiber hanging bucket is installed on a suspension collar on the top, the optical fiber is put down into the drillhole through a hammer, then grouting is conducted, grouting adopts sectional grouting, whenthe grouting pipe at the bottom is full, a section of the grouting pipe is pulled upwards and removed, the optical fiber hanging bucket position is kept relatively unchanged, and grouting continues to be conducted; after grouting is completed, the grouting pipe on the top is pulled out, and the cycle is repeated until all the grouting pipes are pulled out.

Description

technical field [0001] The invention relates to the technical field of borehole detection, in particular to a method for arranging vertical optical fibers in deep boreholes and grouting and sealing the holes. Background technique [0002] By laying optical fibers in deep boreholes (generally greater than 300m), using distributed optical fiber sensing technology to monitor the deformation of rock and soil in all layers of the strata around the borehole at the full depth of the borehole, it is useful for the study of underground rock and soil deformation and ground subsidence. Provide support and basis for prevention and treatment. [0003] Distributed optical fiber sensing technology: BOTDR (Brillouin Optical Time Domain Reflectometry), referred to as Brillouin Scattered Light Time Domain Reflectometry, the strain measurement principle is as follows: inject a certain frequency of pulsed light at one end of the optical fiber, the pulsed light and the acoustics inside the optic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/135E21B33/13
CPCE21B33/13E21B47/135
Inventor 贾龙雷明堂蒋小珍蒙彦潘宗源殷仁朝管振德戴建玲吴远斌罗伟权程小杰
Owner INST OF KARST GEOLOGY CAGS
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