CN106517954B - The sleeve shell material and its preparation method of the controllable grouting of the underwater karst of shield tunnel - Google Patents
The sleeve shell material and its preparation method of the controllable grouting of the underwater karst of shield tunnel Download PDFInfo
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- CN106517954B CN106517954B CN201611012383.XA CN201611012383A CN106517954B CN 106517954 B CN106517954 B CN 106517954B CN 201611012383 A CN201611012383 A CN 201611012383A CN 106517954 B CN106517954 B CN 106517954B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
- C04B2201/52—High compression strength concretes, i.e. with a compression strength higher than about 55 N/mm2, e.g. reactive powder concrete [RPC]
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Lining And Supports For Tunnels (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses the sleeve shell material and its collocation method of a kind of controllable grouting of the underwater karst of shield tunnel, the sleeve shell material is made of clay magma, cement, water and flyash, clay magma is formed by clay and water stirring, the proportion of clay magma is 1.20~1.35, and cement is 1~1.5 with flyash quality ratio:1.The collocation method includes step：The engineering objective needed for sleeve shell material is measured by indoor orthogonal test；Regression analysis is carried out to engineering objective, obtains the regression curve between each component and engineering objective；According to engineering actual demand, the quality of the proportion of clay magma in sleeve shell material, the quality of flyash and cement is determined.The sleeve shell material of the present invention has the advantages that stability is strong, underwater dispersion resistance is strong, setting time is adjustable, intensity is adjustable, environmentally protective.The collocation method of the present invention calculates simplicity, time-consuming short, efficient.
Description
Technical field
The present invention relates to geotechnical engineering based process slip casting field, more particularly to the controllable grouting of the underwater karst of shield tunnel
Sleeve shell material and its preparation method.
Background technology
Existing shield tunnel construction shows that grouting process is easy there are slurries when handling rich water type karst or scall
Dilution, range of scatter are difficult to control, block the problems such as solid pipe generation of pipe is frequent, cause shield machine that shield easily occurs in the construction process
Head, cutter (disk) damage are planted, karst is dashed forward the engineering accidents such as mud (water), card machine.For this reason, propose the controllable sleeve valve barrel grouting of improvement
Technique and the controllable clay Cement paste of suitable rich water porous formation are combined, and form a kind of simple controllable shield tunnel rich water
The controllable slip casting method of scall.The core of the method be how two kinds of rapid preparing can drain pulp material, especially a kind of controllable sleeve shell material.
Wherein, should possess some strength after the injection of controllable sleeve shell material, and it is too big to avoid the occurrence of range of scatter, can play " sealing Gu Bi " and
The effect of " Gu pipe is only starched "." sealing Gu Bi " reaches the effect of solid hole sealing i.e. in sleeve shell material radial diffusion to stratum；Gu " pipe
Only slurry " i.e. sleeve shell material is axially diffused to injected hole, and make floral tube influences during slip casting from reperfusion serosity, keeps vertical steady
Fixed, and when preventing from injecting controllable clay Cement paste, slurries axial grout between hole wall and floral tube wall, when slip casting, forces controllable viscous
Soil-cement cream slurry radially pours into stratum.
There are setting time to be difficult to for existing sheath body, and longitudinal plugging effect is poor, axially diffuses the problems such as being difficult to control.Cause
This, how a kind of controllable grouting sleeve shell material of the underwater karst of shield tunnel suitable for the engineering method of rapid preparing, ensure the engineering method
Feasibility and slip casting effect, into urgent problem to be solved.
The content of the invention
Present invention aims at provide a kind of controllable grouting of underwater karst of shield tunnel sleeve shell material and its preparation method,
There are setting time to solve existing sheath body to be difficult to, and longitudinal plugging effect is poor, axially diffuses the technical problem for being difficult to control.
To achieve the above object, the present invention provides a kind of sleeve shell material of the controllable grouting of the underwater karst of shield tunnel, set
Shell material is made of clay magma, cement, water and flyash, and clay magma is formed by clay and water stirring, the ratio of clay magma
Weight is 1.20~1.35, and cement is 1~1.5 with flyash quality ratio:1.
The further of sleeve shell material as the present invention is improved：
Preferably, sleeve shell material proportion is 1.3~1.6, clay magma proportion 1.25, and cement is 1 with flyash quality ratio:1
~1.5:1.
Preferably, the 2h syneresis rates of sleeve shell material are less than 5%, and performance meets the related requirement of (GBl75-2007) standard；Water
The fluidity that cement paste circle mould measures is 150mm~300mm, and the viscosity 500ml of cement paste is 20s~90s.If fluidity is too
It is small, viscosity is too big, be unfavorable for sleeve shell material diffusion；If fluidity is too big, viscosity is too small, cause sleeve shell material diffusion too remote, it is unfavorable
Slip casting is starched in cream.
Preferably, cement is 32.5 grades of Portland cements, and cement fineness is little by the screen over-size of 80 μm of square hole screens
In 5%.
Preferably, clay refers to for tonerde (purer tonerde or high pure clay) or silty clay, plasticity
Number is not less than 14, and clay of the particle diameter less than 0.005mm is no less than 30%.
Preferably, sleeve shell material：3d compression strength is less than 0.3MPa, and 6d compression strength is less than 0.6MPa, is moulded during slip casting
Property intensity is 0.1KPa~100KPa.If plastic strength and compression strength are larger, cream slurry can not radially cleave sleeve shell material entrance
Stratum, does not reach perfusion effect；If plastic strength and compression strength are too small, cream slurry is caused to be easy to cleave sleeve shell material, from slip casting
Overflow in aperture.
Preferably, sleeve shell material setting time is 15min~300min.
The technical concept total as one, present invention also offers a kind of set of the controllable grouting of the underwater karst of shield tunnel
The preparation method of shell material, comprises the following steps：
S1：The engineering objective needed for sleeve shell material is measured by indoor orthogonal test；
S2：Regression analysis is carried out to engineering objective, obtains the regression curve between each component and engineering objective；
S3：According to engineering actual demand, the proportion of clay magma in sleeve shell material, the quality of flyash and cement are determined
Quality.
The further of preparation method as the present invention is improved：
Preferably, engineering objective includes fluidity, plastic strength and compression strength.
Preferably, regression analysis includes：Multiple regression analysis is carried out to engineering objective, regression model is advised using second order batch mixing
Model multinomial.
Preferably, it is to optimize processing by establishing Linear Multiobjective mathematical model in step S3, to determine clay original
The quality of the proportion of slurry, the quality of flyash and cement.
The invention has the advantages that：
1st, the sleeve shell material of the controllable grouting of the underwater karst of shield tunnel of the invention, coordinates controllable Cement paste, ensures cream
Slurry is radially injected stratum, excessive without axial direction, can improve the underwater Karst grouting anti-seepage reinforcing effect of shield tunnel, have stability
By force, the advantages that underwater dispersion resistance is strong, setting time is adjustable, intensity is adjustable, environmentally protective and economical and practical.
2nd, the preparation method of the sleeve shell material of the controllable grouting of the underwater karst of shield tunnel of the invention, according to engineering demand,
The formula of quick definite slurries, can save a large number of experiments time, efficient.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to accompanying drawings, the present invention is described in further detail.
Brief description of the drawings
The attached drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its explanation is used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is controllable grouting process and the structure diagram of sleeve shell material；
Fig. 2 is that the sleeve shell material plastic strength of the preferred embodiment of the present invention changes over time figure；
Fig. 3 is the sleeve shell material viscosity profile figure of the preferred embodiment of the present invention；
Each label represents in figure：
1st, high-pressure pulsating grouting pump；2nd, grouting hose；3rd, grout pipe；4th, high pressure only starches vent plug；5th, high-pressure air pipe；6th, air pressure
Source；7th, modified form mini-valve tube；8th, bottom high strength plastics sealing tube；9th, high strength plastics connection ring；10th, controllable sleeve shell material；11st, it is controllable
Cream is starched.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
Fig. 1 is controllable grouting process and the structure diagram of sleeve shell material.During construction, it is segmented from top to bottom using drilling device
Completion of Drilling Hole, installs modified form mini-valve tube component in operation hole, and is fixed with high strength plastics connection ring 9, and installation carries high pressure
The grout pipe 3 and other grouting components of vent plug 4 are only starched, 7 bottom of modified form mini-valve tube is equipped with bottom high strength plastics sealing tube 8, high
Only slurry vent plug 4 is connected pressure by high-pressure air pipe 5 with pneumatic supply 6.High-pressure pulsating grouting pump 1 connects grout pipe by grouting hose 2
3, it can produce instantaneous high pressure by high-pressure pulsating grouting pump 1 and promote controllable sleeve shell material 10 by grout pipe 3 from modified form mini-valve tube 7
Eyelet be circulated into the annular gap between modified form mini-valve tube 7 and operation hole, until sleeve shell material from aperture overflow；In sheath body
Before material does not solidify completely, instantaneous high pressure can be produced by high-pressure pulsating grouting pump 1 again and promote controllable cream slurry 11 to pass through grouting
Pipe 3 is laterally poured into stratum from 7 eyelet of modified form mini-valve tube via sleeve shell material, is continuously uniformly had to grout compartment from bottom to top
The controllability grouting of effect.
Embodiment 1~16：
The sleeve shell material of embodiment 1~16, is mainly made of clay magma, cement, water and flyash, the proportion of clay magma
Control is between 1.20~1.35, and cement is with flyash quality than 1:1~1.5:1, the raw material of the sleeve shell material of embodiment 1~16 is matched somebody with somebody
Than as shown in table 1.
Table 1 includes the 16 of uniform design and assembles than (embodiment 1~16), and wherein magma is 6L, 1~4 group of magma proportion
1.20,5~8 groups of 1.25,9~12 groups of magma proportion, 1.30,13~16 groups of magma proportion magma proportions 1.35, each group fraction in table
According in terms of mass unit kg.
1 uniform design each group of table matches
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| Magma | 4.8 | 4.8 | 4.8 | 4.8 | 5.0 | 5.0 | 5.0 | 5.0 | 5.2 | 5.2 | 5.2 | 5.2 | 8.1 | 8.1 | 8.1 | 8.1 |
| Cement | 0.54 | 0.80 | 1.09 | 1.34 | 0.80 | 0.54 | 1.34 | 1.09 | 1.09 | 1.34 | 0.54 | 0.80 | 2.00 | 1.60 | 1.20 | 0.80 |
| Flyash | 0.54 | 0.80 | 1.09 | 1.34 | 0.80 | 0.54 | 1.34 | 1.09 | 1.09 | 1.34 | 0.54 | 0.80 | 2.00 | 1.60 | 1.20 | 0.80 |
Tested through laboratory test, the performance of embodiment 1~16 is shown in Table 2.
2 sleeve shell material the performance test results of table
Embodiment 17：
Result of the test (engineering objective) in table 2 carries out data analysis, and each factor and set are established using IBM-SPSS softwares
Regression relation between shell material proportion, plastic strength and compression strength.If magma quality is X1, cement quality X2, flyash
Quality is X3, and sleeve shell material proportion is G, and 3d compression strength is that P3,7d compression strength are P7, fluidity L.It can obtain following relational expression
(regression function)：
It is 1.35≤G≤1.60,130mm that the underwater karst treatment construction site of certain shield tunnel, which needs to configure sleeve shell material performance,
≤ L≤190mm, P3≤0.3MPa, P7≤0.6MPa.By above-mentioned regression function, matlab Optimization Toolboxes are utilized
Fgoalattain functions establish Linear Multiobjective mathematical model, and the proportioning that can obtain slurries is：X1=5.2, X2=0.80, X3
=0.80, i.e., it need to add 8kg flyash and 8kg Portland cements (32.5) per the magma that 60L proportions are 1.25.
Fig. 2 is sleeve shell material plastic strength versus time curve, as shown in Figure 2, over time, slurries plasticity
Intensity increases, but shows that sleeve shell material setting time is slow and intensity is low still less than 14kPa after 5 days.(in Fig. 2, x-axis is the time,
Unit is daily；Y-axis is plastic strength, unit kPa).
Fig. 3 represents that co-content is not trapped shell material viscosity test results, from the figure 3, it may be seen that sleeve shell material viscosity is suitable, and beneficial to vertical
To closure, axial controlled diffusion.(in Fig. 3, x-axis is volume, units/ml；Y-axis is the time, unit s).
Embodiment 18：
The preparation method of the sleeve shell material of the controllable grouting of the underwater karst of shield tunnel of the present embodiment, comprises the following steps：
S1：The engineering objective needed for sleeve shell material is measured by indoor orthogonal test；
S2：To engineering objective, (engineering objective refers mainly to construction and slip casting effect requirement herein, such as：When pumpability, condensation
Between, fluidity, plastic strength, compression strength etc. and consolidating strength, barrier properties etc.) carry out regression analysis, obtain each component with
Regression curve between engineering objective.Regression analysis includes：Multiple regression analysis is carried out to engineering objective, regression model uses two
Rank batch mixing specification multinomial.
S3：It is to optimize processing by establishing Linear Multiobjective mathematical model according to engineering actual demand, it is viscous to determine
The quality of the proportion of native magma, the quality of flyash and cement.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the invention, for the skill of this area
For art personnel, the invention may be variously modified and varied.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should all be included in the protection scope of the present invention.
Claims (3)
1. the preparation method of the sleeve shell material of the controllable grouting of a kind of underwater karst of shield tunnel, it is characterised in that including following step
Suddenly：
S1：Engineering objective needed for sleeve shell material is measured by indoor orthogonal test, the engineering objective resists including fluidity L, 3d
Compressive Strength P3 and 7d compression strength P7；
S2：Regression analysis is carried out to the engineering objective, obtains the recurrence letter between following each component and the engineering objective
Number：
<mrow>
<mi>G</mi>
<mo>=</mo>
<mn>0.948</mn>
<msubsup>
<mi>X</mi>
<mn>1</mn>
<mn>2</mn>
</msubsup>
<mo>+</mo>
<mn>2.159</mn>
<msub>
<mi>X</mi>
<mn>3</mn>
</msub>
<mo>-</mo>
<mn>1.630</mn>
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<mi>X</mi>
<mn>1</mn>
</msub>
<msub>
<mi>X</mi>
<mn>3</mn>
</msub>
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<mn>0.137</mn>
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<mn>537.158</mn>
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<mn>762.263</mn>
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<mn>1</mn>
</msub>
<msub>
<mi>X</mi>
<mn>3</mn>
</msub>
<mo>-</mo>
<mn>1007.752</mn>
<msub>
<mi>X</mi>
<mn>3</mn>
</msub>
<mo>+</mo>
<mn>1129.826</mn>
</mrow>
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<mn>3</mn>
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<mn>1.634</mn>
<mi>X</mi>
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<mn>3.418</mn>
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<mo>-</mo>
<mn>2.423</mn>
</mrow>
Wherein, X1For magma quality, X2For cement quality, X3For flyash quality, G is sleeve shell material proportion；
S3：According to engineering actual demand, proportion, the flyash of the clay magma in sleeve shell material are determined by above-mentioned regression function
Quality and cement quality.
2. preparation method according to claim 1, it is characterised in that the regression analysis includes：Engineering objective is carried out
Multiple regression analysis, regression model use second order batch mixing specification multinomial.
3. preparation method according to claim 2, it is characterised in that be by establishing linear more mesh in the step S3
Mark mathematical model optimizes processing, to determine the quality of the proportion of clay magma, the quality of flyash and cement.
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| CN201611012383.XA CN106517954B (en) | 2016-11-17 | 2016-11-17 | The sleeve shell material and its preparation method of the controllable grouting of the underwater karst of shield tunnel |
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| CN201611012383.XA CN106517954B (en) | 2016-11-17 | 2016-11-17 | The sleeve shell material and its preparation method of the controllable grouting of the underwater karst of shield tunnel |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108439898B (en) * | 2018-04-08 | 2020-08-25 | 北京中煤矿山工程有限公司 | Casing material for grouting horizontal valve pipe of water-rich sand gravel layer on shield top line |
| CN112943274A (en) * | 2021-04-06 | 2021-06-11 | 中天建设集团有限公司 | Design method for mixing ratio of high-performance shield tunnel synchronous grouting material |
| CN113943132A (en) * | 2021-10-14 | 2022-01-18 | 郑州大学 | Shield muck replacement type shield segment post-grouting environment-friendly slurry |
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| CN101864763A (en) * | 2010-05-29 | 2010-10-20 | 中国二十二冶集团有限公司 | Foundation integrated processing construction method of cover type karst area |
| CN104790982A (en) * | 2015-04-09 | 2015-07-22 | 深圳市永鑫建筑工程集团有限公司 | Enclosed mud for underground excavation tunnel ultra-deep hole grouting |
| CN105649656A (en) * | 2016-03-31 | 2016-06-08 | 中南大学 | Grouting system and method suitable for shield tunnel underwater karst stratum |
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| CN101864763A (en) * | 2010-05-29 | 2010-10-20 | 中国二十二冶集团有限公司 | Foundation integrated processing construction method of cover type karst area |
| CN104790982A (en) * | 2015-04-09 | 2015-07-22 | 深圳市永鑫建筑工程集团有限公司 | Enclosed mud for underground excavation tunnel ultra-deep hole grouting |
| CN105649656A (en) * | 2016-03-31 | 2016-06-08 | 中南大学 | Grouting system and method suitable for shield tunnel underwater karst stratum |
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