CN111828043B - Method for monitoring diffusion range of synchronous grouting slurry of shield tail of large-diameter shield - Google Patents
Method for monitoring diffusion range of synchronous grouting slurry of shield tail of large-diameter shield Download PDFInfo
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- CN111828043B CN111828043B CN202010609204.0A CN202010609204A CN111828043B CN 111828043 B CN111828043 B CN 111828043B CN 202010609204 A CN202010609204 A CN 202010609204A CN 111828043 B CN111828043 B CN 111828043B
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- 239000002002 slurry Substances 0.000 title claims abstract description 81
- 238000009792 diffusion process Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 41
- 238000012544 monitoring process Methods 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 claims abstract description 48
- 239000002184 metal Substances 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000010276 construction Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 239000002923 metal particle Substances 0.000 claims abstract description 14
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 230000005641 tunneling Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/74—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables of fluids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
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- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a method for monitoring the diffusion range of synchronous grouting slurry of a large-diameter shield tail, which comprises the following steps: doping metal powder into the first slurry for shield tail synchronous grouting to prepare second slurry; and in the shield construction process, the second slurry is adopted to carry out shield tail synchronous grouting, and the metal detection radar is synchronously utilized to monitor the diffusion range of the metal particles in the metal powder. According to the invention, the metal powder is doped into the grouting slurry, and the diffusion range of metal particles in the slurry injected into the duct piece wall is detected by using the metal detection radar, so that the diffusion range of the slurry after the duct piece wall can be quickly and accurately obtained, the compactness degree, the grouting effect and the like of the grouting can be further analyzed according to the diffusion range, whether the grouting quality meets the requirements or not can be judged, and then the slurry and the grouting process can be timely adjusted, so that the construction quality of the synchronous grouting of the large-diameter shield is ensured, and the overall safety of the tunnel section construction is improved.
Description
Technical Field
The invention relates to the technical field of tunnel shield construction, in particular to a method for monitoring the diffusion range of synchronous grouting slurry of a large-diameter shield tail.
Background
The synchronous grouting is an important process for filling a building gap between a soil body and a segment ring and reducing later-stage deformation in the shield construction process, and the ground surface deformation and the segment offset can be reduced to the minimum by timely, uniform and sufficient pressure-grouting synchronous grouting slurry in shield propulsion construction.
The large-diameter shield is large in excavation section and large in buried depth, the underground stress environment is complex, and the problems of grouting quality and slurry filling effect inspection cannot be directly known after pressure grouting of limited shield tail grouting hole positions, so that key processes such as settlement control and attitude control of large-diameter shield construction are influenced.
The Chinese patent with application number of 201810932194.7 discloses a method for detecting shield segment wall postgrouting quality by using geological radar, which solves the problem that radar secondary reflected wave signals of a shield segment are overlapped with reflection signals of a wall postgrouting layer so that effective detection cannot be realized, but the method is limited by size effect in large-diameter shield construction, and is difficult to accurately and effectively measure the slurry diffusion range and filling effect.
Disclosure of Invention
In order to solve the problems, the invention provides a method for monitoring the diffusion range of synchronous grouting slurry at the tail of a large-diameter shield, which can quickly and accurately detect the diffusion range of duct piece wall post-grouting, ensure the construction quality of the synchronous grouting of the large-diameter shield and improve the safety of the whole construction.
The invention is realized by the following technical scheme: a method for monitoring the diffusion range of synchronous grouting slurry of a shield tail of a large-diameter shield comprises the following steps:
metal powder is doped into the first slurry for shield tail synchronous grouting to prepare second slurry;
and in the shield construction process, the second slurry is adopted to carry out shield tail synchronous grouting, and the metal detection radar is synchronously utilized to monitor the diffusion range of the metal particles in the metal powder.
According to the method for monitoring the diffusion range of the synchronous grouting slurry at the shield tail of the large-diameter shield, metal powder is doped into the grouting slurry, and the diffusion range of metal particles in the slurry injected into the duct piece wall is detected by using a metal detection radar, so that the diffusion range of the slurry after the duct piece wall can be quickly and accurately obtained, the compactness degree and the grouting effect of the grouting can be conveniently analyzed, the slurry and the grouting process can be timely adjusted, the construction quality of the synchronous grouting of the large-diameter shield is ensured, and the overall safety of the construction of the tunnel section is improved.
The invention further improves the method for monitoring the diffusion range of the large-diameter shield tail synchronous grouting slurry, and comprises the following steps: when the second slurry is prepared, the metal powder is uniformly scattered into the first slurry while being stirred.
The invention further improves the method for monitoring the diffusion range of the synchronous grouting slurry of the shield tail of the large-diameter shield, and comprises the following steps: the first slurry is cement slurry or cement slurry doped with water glass.
The invention further improves the method for monitoring the diffusion range of the large-diameter shield tail synchronous grouting slurry, and comprises the following steps: the type of metal powder is determined prior to making the second slurry by combining the components of the first slurry and taking into account the inertness, density, cost and diffusion properties of the metal.
The invention further improves the method for monitoring the diffusion range of the large-diameter shield tail synchronous grouting slurry, and comprises the following steps: the type of the metal powder is magnesium powder.
The invention further improves the method for monitoring the diffusion range of the large-diameter shield tail synchronous grouting slurry, and comprises the following steps: before the second slurry is prepared, the particle size of the metal particles in the metal powder is determined according to the identification precision of the metal detection radar.
The invention further improves the method for monitoring the diffusion range of the large-diameter shield tail synchronous grouting slurry, and comprises the following steps: the particle size of the metal particles is 80-120 mu m.
The invention further improves the method for monitoring the diffusion range of the large-diameter shield tail synchronous grouting slurry, and comprises the following steps: when the metal detection radar is used for monitoring, scanning is carried out along the annular direction and the depth direction of the duct piece.
Drawings
FIG. 1 is a flow chart of a method for monitoring the diffusion range of synchronous grouting slurry of a large-diameter shield tail of the shield tunneling machine.
FIG. 2 is a diagram of the diffusion range of the large-diameter shield tail synchronous grouting slurry of the invention.
Detailed Description
Referring to fig. 1, the process is limited, in the construction process of the large-diameter shield, because the number of the grouting holes 11 at the shield tail 10 is limited, and the grouting process is performed in a completely sealed and concealed environment, the effect of synchronous grouting cannot be directly detected and observed, and the synchronous grouting directly affects the attitude control and the surface deformation control after the subsequent tunnel forming, a method capable of quickly and accurately detecting the diffusion range and the filling effect of the post-grouting is urgently needed in the construction process of the large-diameter shield, otherwise the requirement of the fine construction of the large-diameter shield engineering is difficult to meet.
The invention provides a method for monitoring the diffusion range of synchronous grouting slurry at the tail of a large-diameter shield, which can quickly and accurately detect the diffusion range of segment wall postgrouting, ensure the construction quality of the synchronous grouting of the large-diameter shield and improve the safety of the whole construction.
The method for monitoring the diffusion range of the synchronous grouting slurry at the tail of the large-diameter shield is further described with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, the present embodiment provides a method for monitoring a diffusion range of slurry during synchronous grouting of a large-diameter shield tail, including the following steps:
s1, doping metal powder into the first slurry for shield tail synchronous grouting to prepare second slurry;
and S2, in the shield construction process, synchronously grouting the shield tail by using the second slurry, and synchronously monitoring the diffusion range of the metal particles in the metal powder by using a metal detection radar.
In the method, synchronous grouting is carried out at the shield tail 10 along with the tunneling of the shield tunneling machine, the second slurry injected into the duct piece wall is manually and synchronously swept by using the metal detection radar while the synchronous grouting is carried out, the diffusion range of metal particles in the second slurry is timely fed back in the sweeping process, and the diffusion range is the diffusion range 20 of the synchronously injected second slurry.
By adopting the method, the diffusion range of the second slurry behind the segment wall can be quickly and accurately obtained, the compactness, the grouting effect and the like of the outlet pipe grouting can be further analyzed according to the diffusion range, so that whether the grouting quality meets the requirements or not can be judged, and then the slurry and the grouting process can be timely adjusted, so that the construction quality of the large-diameter shield synchronous grouting is ensured, and the overall safety of the tunnel segment construction is improved.
Preferably: when the second slurry is prepared, the metal powder is uniformly scattered into the first slurry under stirring to form the second slurry.
The first slurry in the method is the traditional slurry for shield tail synchronous grouting, the common type is a single-liquid cement slurry form or a double-liquid cement slurry form doped with water glass, and by the method, the metal powder is uniformly distributed in the first slurry, so that the monitored diffusion range of the metal particles can more accurately reflect the diffusion range of the second slurry.
Preferably: before the second slurry is prepared, the type of the metal powder needs to be determined by combining the components of the first slurry and comprehensively considering the inertness, density, cost, diffusion property and the like of the metal.
Specifically, the method comprises the following steps: when considering the inertness of the metal, the inertness of the metal is required to meet the requirement that the metal powder is not easy to generate chemical reaction with the first slurry; when the density of the metal is considered, the density of the metal is required to meet the requirement that the metal powder is not easy to precipitate and separate after being mixed into the first slurry; at the same time, it is required that the cost of the metal powder is as low as possible and that the diffusion properties in the first slurry are as good as possible.
Preferably: after considering the above factors in combination, it is determined that the type of the metal powder is magnesium powder.
Preferably: before the second slurry is prepared, the particle size of the metal particles in the metal powder is determined according to the identification precision of the metal detection radar.
After a plurality of tests, the magnesium powder with the grain diameter of 80-120 mu m is adopted as the metal powder doped into the first slurry, the effect is better, and especially the magnesium powder with the grain diameter of 100 mu m has the best effect.
Preferably: when the metal particles in the metal powder are monitored by the metal detection radar synchronously, the scanning measurement is carried out along the annular direction and the depth direction of the pipe piece. So as to obtain the grouting effect in the test ring with a certain depth.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (3)
1. A method for monitoring the diffusion range of large-diameter shield tail synchronous grouting slurry is characterized by comprising the following steps:
metal powder is doped into the first slurry for shield tail synchronous grouting to prepare second slurry;
in the shield construction process, the second slurry is adopted to carry out shield tail synchronous grouting, and a metal detection radar is synchronously utilized to monitor the diffusion range of metal particles in the metal powder;
When the second slurry is prepared, uniformly scattering metal powder into the stirred first slurry, wherein the first slurry is cement slurry doped with water glass;
before making the second slurry, determining the type of the metal powder by combining the components of the first slurry and comprehensively considering the inertness, density, cost and diffusion performance of the metal, wherein the type of the metal powder is magnesium powder;
before the second slurry is prepared, the particle size of the metal particles in the metal powder is determined according to the identification precision of the metal detection radar.
2. The method for monitoring the diffusion range of the synchronous grouting slurry of the shield tail of the large-diameter shield as claimed in claim 1, wherein the method comprises the following steps: the particle size of the metal particles is 80-120 μm.
3. The method for monitoring the diffusion range of the synchronous grouting slurry of the shield tail of the large-diameter shield as claimed in claim 1, wherein the method comprises the following steps: when monitoring is carried out by using a metal detection radar, scanning is carried out along the annular direction and the depth direction of the duct piece.
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| CN202010609204.0A CN111828043B (en) | 2020-06-29 | 2020-06-29 | Method for monitoring diffusion range of synchronous grouting slurry of shield tail of large-diameter shield |
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| CN202010609204.0A CN111828043B (en) | 2020-06-29 | 2020-06-29 | Method for monitoring diffusion range of synchronous grouting slurry of shield tail of large-diameter shield |
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| CN111828043B true CN111828043B (en) | 2022-06-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114414438B (en) * | 2022-01-24 | 2024-01-26 | 中国矿业大学 | Identification method for detecting grouting diffusion range based on proton magnetometer |
| CN114634342B (en) * | 2022-04-12 | 2022-12-09 | 中南大学 | Post-grouting contrast slurry and diffusion process ultrasonic positioning method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676194Y (en) * | 2003-12-29 | 2005-02-02 | 同济大学 | Testing device for geological radar detection of shield tunnel backfilled grout |
| CN105926690A (en) * | 2016-05-23 | 2016-09-07 | 浙江工业大学 | New method for applying boron neutron lifetime well logging technology to detect quality of pile foundation post pressure grouting |
| JP6162291B2 (en) * | 2016-06-21 | 2017-07-12 | 株式会社フジタ | Backing material injection device |
| CN109188426A (en) * | 2018-08-16 | 2019-01-11 | 广西有色勘察设计研究院 | A method of utilizing geologic radar detection shield duct piece grouting behind shaft or drift lining quality |
| CN111650584A (en) * | 2020-05-14 | 2020-09-11 | 中国科学院武汉岩土力学研究所 | Method and equipment for detecting reinforcement effect of shield tunnel through grouting behind wall |
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- 2020-06-29 CN CN202010609204.0A patent/CN111828043B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2676194Y (en) * | 2003-12-29 | 2005-02-02 | 同济大学 | Testing device for geological radar detection of shield tunnel backfilled grout |
| CN105926690A (en) * | 2016-05-23 | 2016-09-07 | 浙江工业大学 | New method for applying boron neutron lifetime well logging technology to detect quality of pile foundation post pressure grouting |
| JP6162291B2 (en) * | 2016-06-21 | 2017-07-12 | 株式会社フジタ | Backing material injection device |
| CN109188426A (en) * | 2018-08-16 | 2019-01-11 | 广西有色勘察设计研究院 | A method of utilizing geologic radar detection shield duct piece grouting behind shaft or drift lining quality |
| CN111650584A (en) * | 2020-05-14 | 2020-09-11 | 中国科学院武汉岩土力学研究所 | Method and equipment for detecting reinforcement effect of shield tunnel through grouting behind wall |
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