CN110818334A - Slurry for shield grouting and preparation method thereof - Google Patents
Slurry for shield grouting and preparation method thereof Download PDFInfo
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- CN110818334A CN110818334A CN201911260482.3A CN201911260482A CN110818334A CN 110818334 A CN110818334 A CN 110818334A CN 201911260482 A CN201911260482 A CN 201911260482A CN 110818334 A CN110818334 A CN 110818334A
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- shield grouting
- cement
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- 239000002002 slurry Substances 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000004568 cement Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 20
- 239000000440 bentonite Substances 0.000 claims abstract description 20
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000010881 fly ash Substances 0.000 claims abstract description 20
- 239000004576 sand Substances 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 238000007711 solidification Methods 0.000 claims description 9
- 230000008023 solidification Effects 0.000 claims description 9
- 238000010908 decantation Methods 0.000 claims description 4
- 239000011435 rock Substances 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 description 6
- 238000007596 consolidation process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 238000007569 slipcasting Methods 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 235000013547 stew Nutrition 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Architecture (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides slurry for shield grouting and a preparation method thereof, wherein the slurry comprises the following components in parts by mass: 130-180 parts of cement, 311-450 parts of fly ash, 30-170 parts of bentonite, 550-1300 parts of sand and 380-554 parts of water. The preparation method of the slurry for shield grouting comprises the step S1 of mixing 130-180 parts by mass of cement, 311-450 parts by mass of fly ash, 30-170 parts by mass of bentonite, 550-1300 parts by mass of sand and 380-554 parts by mass of water in a container to form a mixture; and step S2, stirring the mixture in the container until the components are uniformly mixed to form the slurry for shield grouting. The invention solves the problems that the proportion of each component of grouting slurry in the prior art is unreasonable, the connection stability between the duct piece and the surrounding rock is influenced due to poor curing stability, and the subsequent normal use of the tunnel structure is influenced due to low stability of the tunnel structure.
Description
Technical Field
The invention relates to the technical field of shield grouting, in particular to slurry for shield grouting and a configuration method thereof.
Background
In the construction process of the subway tunnel, the shield method is widely applied due to high mechanization degree, safe construction and good adaptability.
In order to effectively control the settlement of the ground, grouting slurry is usually filled into a building gap between a duct piece and surrounding rocks in time in the shield construction process, but the problem of poor curing stability exists due to unreasonable proportion of components of the existing grouting slurry, so that the connection stability between the duct piece and the surrounding rocks is poor after the existing grouting slurry is cured, and the stability of a tunnel structure is low, and the subsequent normal use of the tunnel structure is influenced.
Disclosure of Invention
The invention mainly aims to provide slurry for shield grouting and a configuration method thereof, and aims to solve the problems that the conventional grouting slurry is unreasonable in proportion of components, poor in curing stability affects the connection stability between a duct piece and surrounding rocks, and further the stability of a tunnel structure is low, so that the subsequent normal use of the tunnel structure is affected.
In order to achieve the above object, according to one aspect of the present invention, there is provided a slurry for shield grouting, comprising the following components in parts by mass: 130-180 parts of cement, 311-450 parts of fly ash, 30-170 parts of bentonite, 550-1300 parts of sand and 380-554 parts of water.
Further, preparing the following components in parts by mass to form a slurry: 130 parts of cement, 450 parts of fly ash, 100 parts of bentonite, 550 parts of sand and 550 parts of water.
Further, preparing the following components in parts by mass to form a slurry: 180 parts of cement, 400 parts of fly ash, 170 parts of bentonite, 550 parts of sand and 554 parts of water.
Further, preparing the following components in parts by mass to form a slurry: 170 parts of cement, 311 parts of fly ash, 150 parts of bentonite, 600 parts of sand and 522 parts of water.
Further, preparing the following components in parts by mass to form a slurry: 170 parts of cement, 322 parts of fly ash, 100 parts of bentonite, 700 parts of sand and 522 parts of water.
Further, the gel time of the slurry is less than or equal to 2 h.
Further, the strength of the solidified body after the slurry is left to stand and solidify for one day is greater than or equal to 0.2MPa, and the strength of the solidified body after the slurry is left to stand and solidify for one month is greater than or equal to 2 MPa.
Further, the setting rate of the slurry is more than 90%; the decantation rate of the slurry is less than 5%.
Further, the consistency of the slurry is 8cm or more and 12cm or less.
According to another aspect of the present invention, there is provided a method for preparing a slurry for shield grouting, comprising the steps of: step S1, mixing 130-180 parts by mass of cement, 311-450 parts by mass of fly ash, 30-170 parts by mass of bentonite, 550-1300 parts by mass of sand and 380-554 parts by mass of water in a container to form a mixture; and step S2, stirring the mixture in the container until the components are uniformly mixed to form the slurry for shield grouting.
By applying the technical scheme of the invention, through giving the composition of each component of the slurry for shield grouting and optimizing the numerical range of the mass parts of each component, when a user selects the proportioning mass parts of each component, the slurry for shield grouting can be randomly selected in the given numerical range, and the prepared slurry for shield grouting has strong curing stability, so that a solidified body obtained after the slurry is statically placed and solidified can play a role in stably connecting the duct piece and the surrounding rock, the stability of a tunnel structure is improved, and the ground settlement is effectively controlled.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a flow chart of a method for configuring slurry for shield grouting according to an alternative embodiment 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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
In order to solve the problems that the conventional grouting slurry is unreasonable in proportion of components, poor in curing stability affects the connection stability between a duct piece and surrounding rocks, and further causes low stability of a tunnel structure, and affects subsequent normal use of the tunnel structure, the invention provides the grouting slurry for shield grouting and a configuration method thereof, wherein as shown in a flow chart of the configuration method of the grouting slurry for shield grouting, the configuration method of the grouting slurry for shield grouting is used for configuring the grouting slurry for shield grouting, and comprises the following steps: step S1, mixing 130-180 parts by mass of cement, 311-450 parts by mass of fly ash, 30-170 parts by mass of bentonite, 550-1300 parts by mass of sand and 380-554 parts by mass of water in a container to form a mixture; and step S2, stirring the mixture in the container until the components are uniformly mixed to form the slurry for shield grouting.
That is to say, the slurry for shield grouting comprises the following components in parts by mass: 130-180 parts of cement, 311-450 parts of fly ash, 30-170 parts of bentonite, 550-1300 parts of sand and 380-554 parts of water.
In this application, through the constitution of each component of given shield slip casting with thick liquid to and optimize the numerical range of the quality of each component, when the user is selecting the ratio quality of each component, choose wantonly in the above-mentioned numerical range of giving, the shield slip casting that disposes all can have very strong solidification stability with thick liquid, thereby the solidification body after the thick liquid solidification of stewing can play the stable connection effect to section of jurisdiction and country rock, tunnel structure's steadiness has not only been improved, and ground subsidence has been controlled effectively.
In alternative example 1 of the present application, a slurry was formed in the following composition in parts by mass: 130 parts of cement, 450 parts of fly ash, 100 parts of bentonite, 550 parts of sand and 550 parts of water.
In alternative example 2 of the present application, a slurry was formed in the following composition in parts by mass: 180 parts of cement, 400 parts of fly ash, 170 parts of bentonite, 550 parts of sand and 554 parts of water.
In alternative example 3 of the present application, a slurry was formed in the following composition in parts by mass: 170 parts of cement, 311 parts of fly ash, 150 parts of bentonite, 600 parts of sand and 522 parts of water.
In alternative example 4 of the present application, a slurry was formed in the following composition in parts by mass: 170 parts of cement, 322 parts of fly ash, 100 parts of bentonite, 700 parts of sand and 522 parts of water.
It should be noted that specific parameters in the above alternative embodiments 1 to 4 are shown in table 1. The four different slurry for shield grouting all have strong curing stability, have the characteristics of no dispersion, no segregation, no precipitation and controllable setting time in water, and can be suitable for grouting operation when a shield machine is driven to different stratum positions.
Table 1 contents of components of slurries in examples
In the present application, the gel time of the slurry is 2 hours or less. Thus, the slurry is ensured to be effectively gelled in a short time, so that the slurry loses fluidity in a short time, and later solidification of the slurry is facilitated.
In the present application, the strength of the solidified material after one day after the slurry is left to stand and set is 0.2MPa or more, and the strength of the solidified material after one month after the slurry is left to stand and set is 2MPa or more. Like this, along with the increase of the time of thick liquid after the solidification of stewing, the thick liquid intensity of the consolidation body after the solidification of stewing constantly increases, is favorable to the thick liquid to stew the consolidation body after the solidification and play the supporting role to the country rock, has controlled the subsidence on ground effectively, has ensured the safety of the peripheral building of tunnel, has increased the steadiness of tunnel structure itself simultaneously.
It should be noted that, in the present application, the setting rate of the slurry is greater than 90%; the decantation rate of the slurry is less than 5%. Therefore, the setting rate of the slurry is greater than 90%, namely the consolidation shrinkage rate is less than 10%, and on the premise that the slurry meets the required strength index, the setting rate of the slurry is greater than 90%, so that the reinforcing effect of the slurry on the duct piece and the surrounding rock is effectively improved; the decantation rate of the slurry is less than 5%, so that the anti-segregation performance of the slurry is improved, the slurry is ensured to have good stability, and the slurry is conveniently conveyed for a long distance.
In the present application, the consistency of the slurry is 8cm or more and 12cm or less. Therefore, the slurry is effectively ensured to have certain fluidity, and the building gap between the duct piece and the surrounding rock is conveniently and fully filled.
Optionally, the cement is a sulphoaluminate cement and/or a portland cement, in view of reducing the cost of the slurry.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The slurry for shield grouting is characterized by comprising the following components in parts by mass:
130-180 parts of cement, 311-450 parts of fly ash, 30-170 parts of bentonite, 550-1300 parts of sand and 380-554 parts of water.
2. The slurry for shield grouting according to claim 1, which is prepared from the following components in parts by mass: 130 parts of cement, 450 parts of fly ash, 100 parts of bentonite, 550 parts of sand and 550 parts of water.
3. The slurry for shield grouting according to claim 1, which is prepared from the following components in parts by mass: 180 parts of cement, 400 parts of fly ash, 170 parts of bentonite, 550 parts of sand and 554 parts of water.
4. The slurry for shield grouting according to claim 1, which is prepared from the following components in parts by mass: 170 parts of cement, 311 parts of fly ash, 150 parts of bentonite, 600 parts of sand and 522 parts of water.
5. The slurry for shield grouting according to claim 1, which is prepared from the following components in parts by mass: 170 parts of cement, 322 parts of fly ash, 100 parts of bentonite, 700 parts of sand and 522 parts of water.
6. The slurry for shield grouting according to claim 1, characterized in that the gel time of the slurry is 2h or less.
7. The slurry for shield grouting according to claim 1, wherein the strength of a solidification body after one day after the slurry is set at rest is 0.2MPa or more, and the strength of a solidification body after one month after the slurry is set at rest is 2MPa or more.
8. The slurry for shield grouting according to claim 1, characterized in that the setting percentage of the slurry is greater than 90%; the decantation rate of the slurry is less than 5%.
9. The slurry for shield grouting according to claim 1, characterized in that the consistency of the slurry is 8cm or more and 12cm or less.
10. A method of arranging the slurry for shield grouting according to any one of claims 1 to 9, comprising:
step S1, mixing 130-180 parts by mass of cement, 311-450 parts by mass of fly ash, 30-170 parts by mass of bentonite, 550-1300 parts by mass of sand and 380-554 parts by mass of water in a container to form a mixture;
and step S2, stirring the mixture in the container until the components are uniformly mixed to form the slurry for shield grouting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911260482.3A CN110818334A (en) | 2019-12-10 | 2019-12-10 | Slurry for shield grouting and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911260482.3A CN110818334A (en) | 2019-12-10 | 2019-12-10 | Slurry for shield grouting and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN110818334A true CN110818334A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911260482.3A Pending CN110818334A (en) | 2019-12-10 | 2019-12-10 | Slurry for shield grouting and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321236A (en) * | 2020-11-19 | 2021-02-05 | 石家庄金隅混凝土有限公司 | High-stability premixed synchronous grouting material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418841A (en) * | 2002-12-26 | 2003-05-21 | 北京城建集团有限责任公司 | Post slip-casting inert slurry for tunnel wall of shield method |
| US20090142143A1 (en) * | 2007-06-12 | 2009-06-04 | Peters Stanley R | Fly Ash Bentonite Slurry Mixture for Slurry Wall Construction |
| CN101654356A (en) * | 2009-09-02 | 2010-02-24 | 中铁二局股份有限公司 | Shield method tunnel synchronous grouting slurry applied to compound stratum with upper soft part and lower hard part |
| CN102767377A (en) * | 2012-08-13 | 2012-11-07 | 中铁一局集团有限公司 | Loess strata subway tunnel earth pressure balance shield construction method |
| CN109681236A (en) * | 2018-12-20 | 2019-04-26 | 中铁二十三局集团有限公司 | Big cross section water-rich sand layer shield driving synchronous grouting method |
-
2019
- 2019-12-10 CN CN201911260482.3A patent/CN110818334A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1418841A (en) * | 2002-12-26 | 2003-05-21 | 北京城建集团有限责任公司 | Post slip-casting inert slurry for tunnel wall of shield method |
| US20090142143A1 (en) * | 2007-06-12 | 2009-06-04 | Peters Stanley R | Fly Ash Bentonite Slurry Mixture for Slurry Wall Construction |
| CN101654356A (en) * | 2009-09-02 | 2010-02-24 | 中铁二局股份有限公司 | Shield method tunnel synchronous grouting slurry applied to compound stratum with upper soft part and lower hard part |
| CN102767377A (en) * | 2012-08-13 | 2012-11-07 | 中铁一局集团有限公司 | Loess strata subway tunnel earth pressure balance shield construction method |
| CN109681236A (en) * | 2018-12-20 | 2019-04-26 | 中铁二十三局集团有限公司 | Big cross section water-rich sand layer shield driving synchronous grouting method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321236A (en) * | 2020-11-19 | 2021-02-05 | 石家庄金隅混凝土有限公司 | High-stability premixed synchronous grouting material |
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Application publication date: 20200221 |