CN106882939B - Hardenable slurry for shield tunnel wall and preparation method thereof - Google Patents
Hardenable slurry for shield tunnel wall and preparation method thereof Download PDFInfo
- Publication number
- CN106882939B CN106882939B CN201710194213.6A CN201710194213A CN106882939B CN 106882939 B CN106882939 B CN 106882939B CN 201710194213 A CN201710194213 A CN 201710194213A CN 106882939 B CN106882939 B CN 106882939B
- Authority
- CN
- China
- Prior art keywords
- parts
- slurry
- reducing agent
- water
- water reducing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
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
- 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
-
- 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
- C04B2111/00663—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like
- C04B2111/00706—Uses not provided for elsewhere in C04B2111/00 as filling material for cavities or the like around pipelines or the like
-
- 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
- C04B2111/00732—Uses not provided for elsewhere in C04B2111/00 for soil stabilisation
-
- 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
- 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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a hardenable slurry for a shield tunnel wall and a preparation method thereof, belonging to the field of grouting slurry for tunnel engineering and comprising the following raw materials in parts by weight: 7-12 parts of cement, 17-23 parts of sand, 19-21 parts of water, 34-40 parts of fly ash, 3-4 parts of sodium tripolyphosphate, 13-15 parts of phosphorous slag micro powder, 2-3 parts of sodium hydroxide, 0.3-0.5 part of water reducing agent, 7-11 parts of calcium chloride and 0.5-0.7 part of silane coupling agent. The slurry has high strength which can reach 7.71MPa in 7 days, the slurry has the consistency of more than 11.2cm, the water seepage rate is small and is 2.7-3.5%, the volume shrinkage is small, the slurry has high fluidity, the later-stage settlement of the ground can be effectively controlled, and the post-grouting construction is more convenient; the slurry has rich source of required raw materials, low price and convenient construction management, and can meet the technical requirements of construction automation.
Description
Technical Field
The invention relates to the field of grouting slurry for tunnel engineering, in particular to post-hardening slurry for a shield tunnel wall and a preparation method thereof.
Background
Nowadays, more and more city underground works and cross-river sea tunnel adopt the shield to construct, and during the construction, the shield constructs the machine and impels forward, and the section of jurisdiction that has accomplished the assembly is pushed out the shield tail by the jack, has appeared the building space in the back of section of jurisdiction, and the synchronous slip casting of shield structure becomes the shield and constructs indispensable link. In order to control the stratum deformation, the aim of controlling bottom layer settlement and stress release is achieved by grouting into a building gap at the tail of the shield, and how to minimize the settlement amount of the earth surface prevents the earth surface from endangering adjacent buildings due to excessive settlement, which becomes a problem of common attention of shield tunnel design and constructors.
At present, synchronous grouting slurry used in shield construction of an underground tunnel is divided into single slurry and double slurry. The double-slurry consists of liquid A and liquid B, wherein the liquid A is mortar consisting of cement, bentonite, a stabilizing material and water, and the liquid B is water glass. Because double liquid needs to be managed simultaneously during construction, the process is complex, grouting pipelines are easy to block, the cleaning is difficult, the adaptability is poor, and the technical content requirement is high, so that single liquid tends to be selected during construction. The domestic existing single slurry mainly comprises cement, fly ash, sand, water and the like, and the problems of easy segregation, poor dispersibility, low later strength, easy pipeline blockage and the like of the slurry generally exist, and the solution of the problem is an important breakthrough for preparing high-quality single slurry.
Disclosure of Invention
In view of the above, the invention provides a slurry which is not easy to separate and has strong fluidity and long-term stability and can be hardened after the shield tunnel wall and a preparation method thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the post-hardening slurry for the shield tunnel wall comprises the following raw materials in parts by weight: 7-12 parts of cement, 17-23 parts of sand, 19-21 parts of water, 34-40 parts of fly ash, 3-4 parts of sodium tripolyphosphate, 13-15 parts of phosphorous slag micro powder, 2-3 parts of sodium hydroxide, 0.3-0.5 part of water reducing agent, 7-11 parts of calcium chloride and 0.5-0.7 part of silane coupling agent.
The invention also has the following additional technical features:
preferably, the feed comprises the following raw materials in parts by weight: 8 parts of cement, 20 parts of sand, 19 parts of water, 36 parts of fly ash, 3 parts of sodium tripolyphosphate, 14 parts of phosphorus slag micro powder, 3 parts of sodium hydroxide, 0.4 part of a water reducing agent, 9 parts of calcium chloride and 0.6 part of a silane coupling agent.
Preferably, the feed comprises the following raw materials in parts by weight: 10 parts of cement, 17 parts of sand, 20 parts of water, 40 parts of fly ash, 4 parts of sodium tripolyphosphate, 13 parts of phosphorus slag micro powder, 3 parts of sodium hydroxide, 0.3 part of a water reducing agent, 11 parts of calcium chloride and 0.5 part of a silane coupling agent.
Preferably, the feed comprises the following raw materials in parts by weight: 12 parts of cement, 23 parts of sand, 21 parts of water, 34 parts of fly ash, 3 parts of sodium tripolyphosphate, 15 parts of phosphorus slag micro powder, 2 parts of sodium hydroxide, 0.5 part of a water reducing agent, 7 parts of calcium chloride and 0.7 part of a silane coupling agent.
Preferably, the water reducing agent is a polycarboxylic acid water reducing agent.
Preferably, the fly ash is II-grade fly ash, the content of calcium oxide is 7-10%, and the fly ash is F-type fly ash.
Preferably, the sand is medium sand and fine sand according to the weight ratio of 1: 1 and mixing.
The invention also provides a preparation method of the post-hardening slurry for the shield tunnel wall, which is characterized by comprising the following steps of:
firstly, weighing cement, sand, water, fly ash, sodium tripolyphosphate, phosphorous slag micro powder, a silane coupling agent and calcium chloride according to a formula, and uniformly stirring in a stirrer;
and step two, respectively and simultaneously adding sodium hydroxide and a water reducing agent into the mixture stirred in the step one, stirring while adding, finishing adding within 20 seconds, and uniformly stirring to obtain the water reducing agent.
Compared with the prior art, the invention has the advantages that:
the slurry has good long-term stability and fluidity, has long initial setting time of 24 hours, and can meet the requirements of shield construction and long-distance delivery;
the slurry has high strength which can reach 7.71MPa in 7 days, the slurry has the consistency of more than 11.2cm, the water seepage rate is small and is 2.7-3.5%, the volume shrinkage is small, the slurry has high fluidity, the later-stage settlement of the ground can be effectively controlled, and the post-grouting construction is more convenient;
the slurry has the advantages of rich source of required raw materials, low price, convenient construction management and capability of meeting the technical requirement of construction automation.
Detailed Description
Some embodiments of the invention are disclosed below, and those skilled in the art can appropriately modify the process parameters to achieve the invention according to the disclosure herein. It is expressly intended that all such similar substitutes and modifications which would be obvious to one skilled in the art are deemed to be included in the invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those of ordinary skill in the art that variations and modifications in the methods and applications described herein, as well as other suitable variations and combinations, may be made to implement and use the techniques of this invention without departing from the spirit and scope of the invention.
EXAMPLE 1 preparation of slurry No. 1
Weighing the following raw materials: 8 parts of cement, 20 parts of sand, 19 parts of water, 36 parts of II-grade fly ash, 3 parts of sodium tripolyphosphate, 14 parts of phosphorus slag micro powder, 3 parts of sodium hydroxide, 0.4 part of polycarboxylic acid water reducing agent, 9 parts of calcium chloride and 0.6 part of silane coupling agent.
The preparation method comprises the following steps:
firstly, weighing cement, sand, water, fly ash, sodium tripolyphosphate, phosphorous slag micro powder, a silane coupling agent and calcium chloride according to a formula, and uniformly stirring in a stirrer;
and step two, simultaneously adding the sodium hydroxide and the water reducing agent chalk into the mixture stirred in the step one, stirring while adding, finishing adding within 20 seconds, and uniformly stirring to obtain the chalk.
The thickness of the prepared slurry is 11.2cm, the water seepage rate is 2.7%, the initial setting is 24 hours, the 3-day compressive strength is 2.37MPa, and the 28-day compressive strength is 7.52 MPa.
Example 2 preparation of slurry No. 2
10 parts of cement, 17 parts of sand, 20 parts of water, 40 parts of II-grade fly ash, 4 parts of sodium tripolyphosphate, 13 parts of phosphorus slag micro powder, 3 parts of sodium hydroxide, 0.3 part of polycarboxylic acid water reducing agent, 11 parts of calcium chloride and 0.5 part of silane coupling agent, and the slurry is prepared according to the method.
Example 3 preparation of slurry No. 3
12 parts of cement, 23 parts of sand, 21 parts of water, 34 parts of II-grade fly ash, 3 parts of sodium tripolyphosphate, 15 parts of phosphorus slag micro powder, 2 parts of sodium hydroxide, 0.5 part of polycarboxylic acid water reducing agent, 7 parts of calcium chloride and 0.7 part of silane coupling agent, and the slurry is prepared according to the method.
When the slurry is used for subway tunnel construction, the pumpability of the slurry is strong, the grouting pipe chariot is not easy to block, the surface of the pipe piece is hardly coated with slurry, the water penetration rate is low, the hardness is high, the long-term stress of the tunnel is facilitated, and the later-stage surface settlement is less than 1 cm. In conclusion, the grout has better practical performance and obvious effect in the subway tunnel shield, and can replace the existing hardenable grout in the tunnel shield construction.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The post-hardening slurry for the shield tunnel wall is characterized by comprising the following raw materials in parts by weight: 8 parts of cement, 20 parts of sand, 19 parts of water, 36 parts of fly ash, 3 parts of sodium tripolyphosphate, 14 parts of phosphorus slag micro powder, 3 parts of sodium hydroxide, 0.4 part of a water reducing agent, 9 parts of calcium chloride and 0.6 part of a silane coupling agent;
the preparation method of the hardenable slurry behind the shield tunnel wall comprises the following steps:
firstly, weighing cement, sand, water, fly ash, sodium tripolyphosphate, phosphorous slag micro powder, a silane coupling agent and calcium chloride according to a formula, and uniformly stirring in a stirrer;
and step two, simultaneously adding sodium hydroxide and a water reducing agent into the mixture stirred in the step one, stirring while adding, and finishing adding within 20 seconds to obtain the water reducing agent.
2. The post-hardening slurry for the shield tunnel wall is characterized by comprising the following raw materials in parts by weight: 10 parts of cement, 17 parts of sand, 20 parts of water, 40 parts of fly ash, 4 parts of sodium tripolyphosphate, 13 parts of phosphorus slag micro powder, 3 parts of sodium hydroxide, 0.3 part of a water reducing agent, 11 parts of calcium chloride and 0.5 part of a silane coupling agent;
the preparation method of the hardenable slurry behind the shield tunnel wall comprises the following steps:
firstly, weighing cement, sand, water, fly ash, sodium tripolyphosphate, phosphorous slag micro powder, a silane coupling agent and calcium chloride according to a formula, and uniformly stirring in a stirrer;
and step two, simultaneously adding sodium hydroxide and a water reducing agent into the mixture stirred in the step one, stirring while adding, and finishing adding within 20 seconds to obtain the water reducing agent.
3. The post-hardening slurry for the shield tunnel wall is characterized by comprising the following raw materials in parts by weight: 12 parts of cement, 23 parts of sand, 21 parts of water, 34 parts of fly ash, 3 parts of sodium tripolyphosphate, 15 parts of phosphorus slag micro powder, 2 parts of sodium hydroxide, 0.5 part of a water reducing agent, 7 parts of calcium chloride and 0.7 part of a silane coupling agent;
the preparation method of the hardenable slurry behind the shield tunnel wall comprises the following steps:
firstly, weighing cement, sand, water, fly ash, sodium tripolyphosphate, phosphorous slag micro powder, a silane coupling agent and calcium chloride according to a formula, and uniformly stirring in a stirrer;
and step two, simultaneously adding sodium hydroxide and a water reducing agent into the mixture stirred in the step one, stirring while adding, and finishing adding within 20 seconds to obtain the water reducing agent.
4. The post-shield tunnel wall hardenable slurry according to any one of claims 1-3, characterized in that the water reducing agent is a polycarboxylic acid based water reducing agent.
5. A shield tunnel wall post-hardenable slurry according to any of claims 1-3, characterized in that the fly ash is grade II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710194213.6A CN106882939B (en) | 2017-03-28 | 2017-03-28 | Hardenable slurry for shield tunnel wall and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710194213.6A CN106882939B (en) | 2017-03-28 | 2017-03-28 | Hardenable slurry for shield tunnel wall and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106882939A CN106882939A (en) | 2017-06-23 |
| CN106882939B true CN106882939B (en) | 2020-11-06 |
Family
ID=59182234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710194213.6A Active CN106882939B (en) | 2017-03-28 | 2017-03-28 | Hardenable slurry for shield tunnel wall and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106882939B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319896C (en) * | 2004-12-29 | 2007-06-06 | 上海隧道工程股份有限公司 | Solidable grouting liquid for synchronous grouting of subway shielded construction |
| CN101851082B (en) * | 2010-05-20 | 2012-07-25 | 同济大学 | Single liquid type hardenable slurry for backfill grouting in tunnel shield construction |
| CN101935198B (en) * | 2010-09-12 | 2012-08-29 | 上海城建市政工程（集团）有限公司 | Environment-friendly shield construction single-liquid synchronous grouting slurry |
| CN106186993B (en) * | 2016-07-18 | 2019-02-22 | 重庆科技学院 | Anhydrous cobble backfills stratum shield Testing of Grouting Material Behind Segments |
-
2017
- 2017-03-28 CN CN201710194213.6A patent/CN106882939B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106882939A (en) | 2017-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101693615A (en) | Sulphoaluminate cement base synchronous slip casting material and preparation method | |
| CN104844129B (en) | A kind of modification thixotropic slurry and compound method thereof | |
| CN103755275B (en) | A kind of morning the strong and clay Cement paste of Anti-erosion | |
| CN107827422A (en) | High waterproof simultaneous grouting slurry for seabed shield tunnel | |
| TW200533628A (en) | Concrete composition, production process thereof, viscosity control method and method of constructing a cast-in-place concrete pile from the concrete composition | |
| CN107698226A (en) | A kind of cement-silicate injecting paste material | |
| CN101851082B (en) | Single liquid type hardenable slurry for backfill grouting in tunnel shield construction | |
| CN105174886B (en) | A kind of limestone aquifer slip casting transformation material that is applicable to extra long distance pumping | |
| CN101935198B (en) | Environment-friendly shield construction single-liquid synchronous grouting slurry | |
| CN112592138A (en) | Single-component active synchronous mortar with controllable setting time and preparation method thereof | |
| JP2016011353A (en) | Composition for foundation improvement, foundation improved body, foundation improvement method and foundation recovery method | |
| KR20180083696A (en) | Chemical composition for grouting and method for preparing the same | |
| CN103539416A (en) | Special novel shear-resistant mortar for synchronous grouting and preparation method thereof | |
| CN109265094A (en) | A kind of no ripple glaze shield duct piece concrete formulation and preparing process | |
| CN106882939B (en) | Hardenable slurry for shield tunnel wall and preparation method thereof | |
| JP2011214290A (en) | Method for construction of concrete structure | |
| CN110044775A (en) | A kind of premixing shield grouting material fluidity test method | |
| JP5354373B2 (en) | Grout material and grout injection method | |
| JP2016538225A (en) | Fluid concrete containing secondary hardening accelerator | |
| JP3686441B2 (en) | One-pack type backfill additive and construction method using the additive | |
| JP3639054B2 (en) | Backfill injection material | |
| CN107382254A (en) | A kind of novel slurry filling material suitable for shield method | |
| JP2004263069A (en) | Plastic grout material, and method and system for injecting the same | |
| CN111423142A (en) | Cement slurry additive for foundation treatment | |
| CN112142403A (en) | Soil-stabilizing grouting material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |