CN111829928A - Method for detecting diffusion range of grouting - Google Patents
Method for detecting diffusion range of grouting Download PDFInfo
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- CN111829928A CN111829928A CN202010675639.5A CN202010675639A CN111829928A CN 111829928 A CN111829928 A CN 111829928A CN 202010675639 A CN202010675639 A CN 202010675639A CN 111829928 A CN111829928 A CN 111829928A
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000011440 grout Substances 0.000 claims abstract description 52
- 239000002002 slurry Substances 0.000 claims abstract description 39
- 239000011435 rock Substances 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 239000011148 porous material Substances 0.000 claims abstract description 14
- 238000004088 simulation Methods 0.000 claims abstract description 13
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 238000012795 verification Methods 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 4
- 230000002706 hydrostatic effect Effects 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 8
- 239000010881 fly ash Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000035699 permeability Effects 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000007569 slipcasting Methods 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N2013/003—Diffusion; diffusivity between liquids
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a method for detecting a diffusion range of grouting, belonging to the technical field of grouting engineering, and comprising the following steps of S1: theoretically analyzing the diffusion range of the grout in the caving zone under different grouting pressures and different grout viscosities; s2: selecting proper grouting pressure and slurry viscosity according to grouting conditions; s3: through numerical simulation comparison verification, the distribution condition of the diffusion distance of the grout during grouting and the pore pressure in the grouting rock body during grouting is contrastively analyzed; s4: according to the distribution of the grout diffusion distance during grouting and the pore pressure in the grouting rock body during grouting in the step S3, generating grouting grout by using a fluid generation device, providing test substances to a grout diffusion testing device according to the designed grouting pressure and grouting amount, detecting the diffusion in grouting models of various fractures by using the grout diffusion testing device, and recovering the completed working grout by using a grout recovery device; the problem of the detection precision low of slip casting diffusion scope in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of grouting engineering, in particular to a method for detecting a diffusion range of grouting.
Background
In order to realize the control of the grouting effect in the grouting engineering, people calculate the grout diffusion parameters through a grout diffusion simulation experiment and establish various grouting diffusion models to simulate and research the grouting diffusion process under different geological conditions. The whole process of a slurry diffusion experiment is monitored in a traditional mode through video recording, then a slurry diffusion graph is drawn manually according to an experiment video after the experiment is completed so as to observe a grouting simulation process, more time is wasted, data acquisition precision is greatly influenced, the video processing process is complex and difficult, and ideal data are not easy to obtain.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method for detecting the diffusion range of the grouting, and solves the problem of low detection precision of the diffusion range of the grouting in the prior art.
The purpose of the invention can be realized by the following technical scheme:
a method for detecting the diffusion range of grouting comprises the following steps:
s1: theoretically analyzing the diffusion range of the grout in the caving zone under different grouting pressures and different grout viscosities;
s2: selecting proper grouting pressure and slurry viscosity according to grouting conditions;
s3: through numerical simulation comparison verification, the distribution condition of the diffusion distance of the grout during grouting and the pore pressure in the grouting rock body during grouting is contrastively analyzed;
s4: according to the distribution of the grout diffusion distance during grouting and the pore pressure in the grouting rock body during grouting in step S3, generating grouting grout by using a fluid generation device, providing test substances to a grout diffusion testing device according to the designed grouting pressure and grouting amount, detecting the diffusion in grouting models of various fractures by using the grout diffusion testing device, and recovering the completed working grout by using a grout recovery device.
As a preferable scheme of the invention, the slurry diffusion testing device comprises a device for adjusting the inclination angle and the width of the crack surface.
In a preferred embodiment of the present invention, the slurry comprises slurry fly ash, cement and water.
As a preferable scheme of the invention, the slurry comprises slurry fly ash, cement and water in a ratio of 2:8:10, so that the requirements on the diffusion range of grouting slurry and the strength of a rock body after grouting are met.
As a preferred embodiment of the present invention, step S3 further includes verifying the grouting spread and grouting pressure by using the numerical simulation result.
As a preferable scheme of the invention, the structural characteristics of the grouted rock body and the physical properties of the grout are stable and unchanged in the grouting process.
As a preferable scheme of the invention, the grouting pressure and the hydrostatic pressure are stable and unchanged in the grouting process.
As a preferred scheme of the invention, in the grouting process, the permeability of loose crushed stone on a grouting top plate is 3.8 multiplied by 10 < -10 > m2The radius of the grouting pipe is 0.03m, the hydrostatic pressure is 0.1MPa, and the radius of the hydrostatic pressure boundary is 100 m.
The invention has the beneficial effects that:
the invention adopts theory to analyze the diffusion range of the grout in the caving zone by different grouting pressures and different grout viscosities, and adopts numerical simulation comparison verification to analyze the distribution of the grout diffusion distance during grouting and the pore pressure in the grouting rock body during grouting, and a fluid generation device, a grout diffusion testing device and a grout recovery device to improve the detection precision of the grouting diffusion range.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a method for detecting the spread range of grouting:
s1: theoretically analyzing the diffusion range of the grout in the caving zone under different grouting pressures and different grout viscosities;
s2: selecting proper grouting pressure and slurry viscosity according to grouting conditions;
s3: through numerical simulation comparison verification, the distribution condition of the diffusion distance of the grout during grouting and the pore pressure in the grouting rock body during grouting is contrastively analyzed;
s4: according to the distribution of the grout diffusion distance during grouting and the pore pressure in the grouting rock body during grouting in step S3, generating grouting grout by using a fluid generation device, providing test substances to a grout diffusion testing device according to the designed grouting pressure and grouting amount, detecting the diffusion in grouting models of various fractures by using the grout diffusion testing device, and recovering the completed working grout by using a grout recovery device.
The scheme adopts theory analysis of diffusion ranges of different grouting pressures and different slurry viscosities to slurry in a caving zone, numerical simulation contrast verification, analysis of distribution conditions of slurry diffusion distances during grouting and pore pressures in a grouting rock body during grouting, a fluid generation device, a slurry diffusion testing device and a slurry recovery device, and improves detection precision of the slurry diffusion ranges.
The slurry diffusion testing device comprises a device for adjusting the inclination angle and the width of the crack surface. The slurry comprises slurry fly ash, cement and water. The proportion of the grout comprising grout fly ash, cement and water is 2:8:10, so that the requirements on the diffusion range of grouting grout and the strength of the rock mass after grouting are met. In step S3, the method further includes verifying the grouting result by using the numerical simulation resultSpread and grouting pressure. In the grouting process, the structural characteristics of the grouting rock body and the physical properties of the grout are stable and unchanged. During grouting, the grouting pressure and the hydrostatic pressure are stable and unchanged. In the grouting process, the permeability of loose crushed stone on a grouting top plate is 3.8 multiplied by 10 < -10 > m2The radius of the grouting pipe is 0.03m, the hydrostatic pressure is 0.1MPa, and the radius of the hydrostatic pressure boundary is 100 m.
According to the scheme, the influence of different grouting pressures and different slurry viscosities on the diffusion range of the slurry in the collapse zone is theoretically analyzed, and the proper grouting pressure and the proper slurry viscosity are selected according to grouting conditions. Then, the theoretical solution under the condition is verified through numerical simulation comparison, the distribution condition of the slurry diffusion distance during grouting and the pore pressure in the grouting rock body during grouting is compared and analyzed, and the following conclusion is obtained: 1) when the slurry fly ash: cement: when the water ratio is 2:8:10, the strength of the rock mass can meet the strength requirement after grouting, and the viscosity of the grout is 0.004 Pa.s. When the grouting time is 6 hours, the diffusion distance of the grout reaches 44.4m, and the requirement of grouting grout is met. When the slurry viscosity is less than 0.004Pa.s, the slurry diffusion distance meets the requirement, but the strength of the rock mass after grouting does not meet the requirement. When the viscosity of the slurry is more than 0.004Pa, s, the diffusion distance of the slurry cannot meet the requirement in the same grouting time. From this, slurry fly ash: cement: when the water is 2:8:10, the requirements of the project on the diffusion range of grouting slurry and the strength of the rock mass after grouting are met. 2) The numerical simulation result verifies the grouting diffusion range and grouting pressure, and the result shows that: and (3) slurry diffusion: the fitting degree of the calculation and numerical calculation results in different time periods is different, the 20min diffusion range curve is basically fitted, and the theoretical diffusion average rate is solved by 0.04m/s compared with the numerical value after 20 min. Grouting pressure error: the difference between the theoretical pore pressure and the numerical value within the range of 0.03-5m is 0.77MPa at most, the rest of the pore pressure occurring at the position 1m away from the pipe orifice is within 0.35MPa, and the error of the pore pressure beyond 5m away from the pipe orifice is within 0.15MPa, so that the allowable error of the actual engineering is met.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. A method for detecting the diffusion range of grouting is characterized by comprising the following steps:
s1: theoretically analyzing the diffusion range of the grout in the caving zone under different grouting pressures and different grout viscosities;
s2: selecting proper grouting pressure and slurry viscosity according to grouting conditions;
s3: through numerical simulation comparison verification, the distribution condition of the diffusion distance of the grout during grouting and the pore pressure in the grouting rock body during grouting is contrastively analyzed;
s4: according to the distribution of the grout diffusion distance during grouting and the pore pressure in the grouting rock body during grouting in step S3, generating grouting grout by using a fluid generation device, providing test substances to a grout diffusion testing device according to the designed grouting pressure and grouting amount, detecting the diffusion in grouting models of various fractures by using the grout diffusion testing device, and recovering the completed working grout by using a grout recovery device.
2. The method for detecting the spread of the grouting according to claim 1, wherein: the slurry diffusion testing device comprises a device for adjusting the inclination angle and the width of a crack surface.
3. The method for detecting the spread of the grouting according to claim 1, wherein: the slurry comprises slurry fly ash, cement and water.
4. The method for detecting the spread of the grouting according to claim 1, wherein: the slurry comprises slurry fly ash, cement and water in a ratio of 2:8:10, and meets the requirements on the diffusion range of grouting slurry and the strength of a grouted rock body.
5. The method for detecting the spread of the grouting according to claim 1, wherein: in step S3, the method further includes verifying the grouting diffusion range and the grouting pressure based on the numerical simulation result.
6. The method for detecting the spread of the grouting according to claim 1, wherein: in the grouting process, the structural characteristics of the grouting rock body and the physical properties of the grout are stable and unchanged.
7. The method for detecting the spread of the grouting according to claim 1, wherein: during grouting, the grouting pressure and the hydrostatic pressure are stable and unchanged.
8. The method for detecting the spread of the grouting according to claim 1, wherein: in the grouting process, the permeability of loose crushed stone on a grouting top plate is 3.8 multiplied by 10 < -10 > m2The radius of the grouting pipe is 0.03m, the hydrostatic pressure is 0.1MPa, and the radius of the hydrostatic pressure boundary is 100 m.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112798475A (en) * | 2020-12-22 | 2021-05-14 | 西安科技大学 | Method, system and device for monitoring diffusion area of grouting slurry in rock-soil mass |
| CN115356238A (en) * | 2022-10-20 | 2022-11-18 | 四川藏区高速公路有限责任公司 | Grouting diffusion radius in-situ measuring device for fractured rock mass |
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| CN112798475A (en) * | 2020-12-22 | 2021-05-14 | 西安科技大学 | Method, system and device for monitoring diffusion area of grouting slurry in rock-soil mass |
| CN112798475B (en) * | 2020-12-22 | 2024-06-07 | 中煤能源研究院有限责任公司 | Monitoring method, system and device for grouting slurry diffusion area in rock-soil body |
| CN115356238A (en) * | 2022-10-20 | 2022-11-18 | 四川藏区高速公路有限责任公司 | Grouting diffusion radius in-situ measuring device for fractured rock mass |
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