CN108706921A - A kind of plastic concrete and preparation method thereof reinforced for shield end - Google Patents
A kind of plastic concrete and preparation method thereof reinforced for shield end Download PDFInfo
- Publication number
- CN108706921A CN108706921A CN201810566508.6A CN201810566508A CN108706921A CN 108706921 A CN108706921 A CN 108706921A CN 201810566508 A CN201810566508 A CN 201810566508A CN 108706921 A CN108706921 A CN 108706921A
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- China
- Prior art keywords
- parts
- shield
- water
- plastic concrete
- proportioning
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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
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/10—Clay
- C04B14/104—Bentonite, e.g. montmorillonite
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
-
- 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
Abstract
The plastic concrete and preparation method thereof that the invention discloses a kind of to reinforce for shield end, the raw material composition and quality proportioning of plastic concrete are：120-150 parts of cement, 40-60 parts of flyash, 130-180 parts of bentonite, sand 700-800 parts middle, 670-720 parts of rubble, 5-8 parts of water-reducing agent, 300-360 parts of water.When shield end is reinforced, the characteristic that the plain concrete diaphram wall poured using this kind of plastic concrete is had low-elasticity-modulus and strained greatly, permeability resistance is good, the leakage of the vertical shaft (foundation pit) at shield launching (or reception) end can more effectively be reduced, water gushes and caves in, the safety for improving shield launching, receiving both ends (vertical shaft) construction；Meanwhile the intensity losses of plain concrete diaphram wall, when follow-up shield-tunneling construction, diaphragm wall causes to wear low to cutterhead, and cutterhead is hardly damaged, and the repair replacement frequency of cutterhead is low, and shield-tunneling construction is efficient, at low cost.
Description
Technical field
The present invention relates to a kind of concrete reinforced for shield end.
Background technology
In recent years, with the rapid development of China's Shield Construction Technique, shield-tunneling construction project also increases increasingly.In shield tunnel
In the Shield Construction Method Used in road, churning note need to be carried out to the ground around the vertical shaft (foundation pit) for originating, receiving both ends of shield machine
Slurry forms stabilization zone；Meanwhile circle plain concrete (mass concrete) diaphram wall can be poured on the outside of stabilization zone, it prevents
The slurries of stabilization zone rotary churning pile are lost in, while can also ensure the relative closure in stabilization zone；It (or is connect with reducing shield launching
Receive) leakage of vertical shaft (foundation pit) at end, water gushes and caves in, the safety for improving shield launching, receiving both ends (vertical shaft) construction.Its
The problem is that：1, it is poured using common concrete, the diaphram wall of formation is easy to crack, permeability resistance is poor, shield
The safety that structure originated, received both ends (vertical shaft) construction need to be improved.2, when follow-up shield-tunneling construction, shield machine can pass through the area
Domain, at this point, the plain concrete diaphragm wall of high intensity can cause to wear to cutterhead, in particular by weak soil cutterhead or compound cutterhead
When, cutter does not have forcing crushing ability mostly based on scraper, cutter, and cutter is easily damaged, and the repair for increasing cutterhead is replaced
Frequency causes shield-tunneling construction efficiency low, of high cost.
Invention content
The first object of the present invention is to provide a kind of plastic concrete reinforced for shield end, is reinforced in shield end
When, the plain concrete diaphram wall poured using this kind of plastic concrete is resisted with low-elasticity-modulus and the characteristic strained greatly
Good penetrability can more effectively reduce the leakage of the vertical shaft (foundation pit) at shield launching (or reception) end, water gushes and caves in, raising shield
Structure originates, receives the safety of both ends (vertical shaft) construction；Meanwhile the intensity losses of plain concrete diaphram wall, follow-up shield
When construction, diaphragm wall causes to wear low to cutterhead, and cutter is hardly damaged, and the repair replacement frequency of cutterhead is low, shield-tunneling construction efficiency
It is high, at low cost.
The present invention realizes its first invention purpose the technical scheme adopted is that a kind of plasticity reinforced for shield end
Concrete, raw material composition and quality proportioning are：120-150 parts of cement, 40-60 parts of flyash, 130-180 parts of bentonite, in
700-800 parts of sand, 670-720 parts of rubble, 5-8 parts of water-reducing agent, 300-360 parts of water.
Compared with prior art, the beneficial effects of the invention are as follows：
One, plastic concrete of the invention, cement consumption is relatively low, and the big flowing such as add more bentonite, clay
Property material.The concrete of this special proportioning has the characteristics such as low-intensity, low-elasticity-modulus and big strain, is a kind of flexible material,
Cohesiveness, water-retaining property, mobility are good, concrete slump 180mm, apparent density 2117kg/m3, sand coarse aggregate ratio
52.4%, the globality that every numerical value is satisfied by construction requirement walls is strong, and impervious good, infiltration coefficient reaches 2.1 × 10-
9cm/s can effectively reduce the leakage of the vertical shaft (foundation pit) at shield launching (or reception) end, water gushes and caves in, guarantee stabilization zone
Interior churning quality improves the safety of shield launching (or reception) construction.
Two, plastic concrete of the invention is a kind of flexible material.Its intensity is low, and 28 days compression strength is 4.02MPa, compared with
The strength reduction 80% of existing concrete.When follow-up shield-tunneling construction, diaphragm wall is low to the abrasion of cutterhead, and cutter is hardly damaged,
The repair replacement frequency for reducing cutterhead improves the efficiency of shield-tunneling construction, reduces construction cost.
Further, currently preferred raw material composition and quality proportioning are：125-135 parts of cement, 45-55 parts of flyash,
140-160 parts of bentonite, sand 750-770 parts middle, 680-700 parts of rubble, 6-7 parts of water-reducing agent, 320-340 parts of water.
The second purpose of the present invention, which is to provide, a kind of preparing the above-mentioned plastic concrete reinforced for shield end
Method, workability, the mobility of simple, the obtained concrete of preparation manipulation of this method are more guaranteed.
The present invention realizes its second goal of the invention the technical scheme adopted is that a kind of above-mentioned reinforces for shield end
Plastic concrete method, the practice is：The bentonite of the proportioning is added in the water of the proportioning, is stirred evenly；Again
Cement, flyash, middle sand, rubble and the water-reducing agent of the proportioning is added, stirs evenly to obtain the final product.
This wet-mixing method technique, easy to operate, workability, the mobility that concrete is made are more guaranteed.
The present invention is described in further detail With reference to embodiment.
Specific implementation mode
Embodiment 1
A kind of plastic concrete reinforced for shield end, raw material composition and quality proportioning are：130 parts of cement, powder
50 parts of coal ash, 150 parts of bentonite, 760 parts of middle sand, 690 parts of rubble, 6.6 parts of water-reducing agent, 330 parts of water.
A method of the plastic concrete reinforced for shield end of this example being prepared, the practice is：By the proportioning
Bentonite be added in the water of the proportioning, stir evenly；It adds the cement of the proportioning, flyash, middle sand, rubble and subtracts
Aqua stirs evenly to obtain the final product.
Test result shows that the concrete slump of this example is 180mm, apparent density 2117kg/m3, sand coarse aggregate ratio
52.4%, infiltration coefficient reaches 2.1 × 10-9cm/s, and 28 days compression strength is 4.02MPa.
Embodiment 2
A kind of plastic concrete reinforced for shield end, raw material composition and quality proportioning are：120 parts of cement, powder
40 parts of coal ash, 130 parts of bentonite, 800 parts of middle sand, 720 parts of rubble, 8 parts of water-reducing agent, 360 parts of water.
A method of the plastic concrete reinforced for shield end of this example being prepared, the practice is：By the proportioning
Bentonite be added in the water of the proportioning, stir evenly；It adds the cement of the proportioning, flyash, middle sand, rubble and subtracts
Aqua stirs evenly to obtain the final product.
Embodiment 3
A kind of plastic concrete reinforced for shield end, raw material composition and quality proportioning are：150 parts of cement, powder
60 parts of coal ash, 180 parts of bentonite, 700 parts of middle sand, 670 parts of rubble, 5 parts of water-reducing agent, 300 parts of water.
A method of the plastic concrete reinforced for shield end of this example being prepared, the practice is：By the proportioning
Bentonite be added in the water of the proportioning, stir evenly；It adds the cement of the proportioning, flyash, middle sand, rubble and subtracts
Aqua stirs evenly to obtain the final product.
Embodiment 4
A kind of plastic concrete reinforced for shield end, raw material composition and quality proportioning are：125 parts of cement, powder
45 parts of coal ash, 140 parts of bentonite, 770 parts of middle sand, 700 parts of rubble, 7 parts of water-reducing agent, 340 parts of water.
A method of the plastic concrete reinforced for shield end of this example being prepared, the practice is：By the proportioning
Bentonite be added in the water of the proportioning, stir evenly；It adds the cement of the proportioning, flyash, middle sand, rubble and subtracts
Aqua stirs evenly to obtain the final product.
Embodiment 5
A kind of plastic concrete reinforced for shield end, raw material composition and quality proportioning are：135 parts of cement, powder
55 parts of coal ash, 160 parts of bentonite, 750 parts of middle sand, 680 parts of rubble, 6 parts of water-reducing agent, 320 parts of water.
A method of the plastic concrete reinforced for shield end of this example being prepared, the practice is：By the proportioning
Bentonite be added in the water of the proportioning, stir evenly；It adds the cement of the proportioning, flyash, middle sand, rubble and subtracts
Aqua stirs evenly to obtain the final product.
Claims (3)
1. a kind of plastic concrete reinforced for shield end, raw material composition and quality proportioning are：120-150 parts of cement,
40-60 parts of flyash, 130-180 parts of bentonite, sand 700-800 parts middle, 670-720 parts of rubble, 5-8 parts of water-reducing agent, water 300-
360 parts.
2. a kind of plastic concrete reinforced for shield end according to claim 1, which is characterized in that the original
Material composition and quality proportioning are：125-135 parts of cement, 45-55 parts of flyash, 140-160 parts of bentonite, it is sand 750-770 parts middle,
680-700 parts of rubble, 6-7 parts of water-reducing agent, 320-340 parts of water.
3. a kind of method preparing the plastic concrete as claimed in claim 1 or 2 reinforced for shield end, the practice are：
The bentonite of the proportioning is added in the water of the proportioning, is stirred evenly；Add the cement of the proportioning, flyash, in
Sand, rubble and water-reducing agent, stir evenly to obtain the final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810566508.6A CN108706921A (en) | 2018-06-05 | 2018-06-05 | A kind of plastic concrete and preparation method thereof reinforced for shield end |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810566508.6A CN108706921A (en) | 2018-06-05 | 2018-06-05 | A kind of plastic concrete and preparation method thereof reinforced for shield end |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108706921A true CN108706921A (en) | 2018-10-26 |
Family
ID=63871329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810566508.6A Pending CN108706921A (en) | 2018-06-05 | 2018-06-05 | A kind of plastic concrete and preparation method thereof reinforced for shield end |
Country Status (1)
| Country | Link |
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| CN (1) | CN108706921A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109704658A (en) * | 2019-01-28 | 2019-05-03 | 上海城建物资有限公司 | Cutting free concrete |
| CN110818351A (en) * | 2019-11-19 | 2020-02-21 | 中铁大桥局第七工程有限公司 | Plastic concrete for runner cushion layer and preparation method thereof |
| CN110835258A (en) * | 2019-10-31 | 2020-02-25 | 中铁二局集团有限公司 | Shield receiving steel sleeve backfill material and preparation method thereof |
| CN114961790A (en) * | 2022-05-27 | 2022-08-30 | 中南大学 | Shield synchronous grouting construction method and construction effect evaluation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07291703A (en) * | 1994-04-18 | 1995-11-07 | Chichibu Onoda Cement Corp | Backfillgrouting material |
| CN102425425A (en) * | 2011-12-26 | 2012-04-25 | 中铁四局集团有限公司 | Working face reinforcing structure in shield machine cabin as well as construction method and equipment thereof |
| CN102503271A (en) * | 2011-10-31 | 2012-06-20 | 广东基础新世纪混凝土有限公司 | C10 self-compacting concrete and preparation method for same |
| CN102617073A (en) * | 2012-01-20 | 2012-08-01 | 北京新奥混凝土集团有限公司 | Plastic concrete for cutoff wall |
| CN202370529U (en) * | 2011-12-26 | 2012-08-08 | 中铁四局集团有限公司 | Tunnel face reinforced structure inside cabin of shield machine |
| CN105399373A (en) * | 2015-11-26 | 2016-03-16 | 中国建筑第六工程局有限公司 | Backfill material for shield method construction |
| EP3048243A1 (en) * | 2015-01-20 | 2016-07-27 | MC-Bauchemie Müller GmbH & Co. Chemische Fabriken | Method for filling a ring area between the outer surface of a tunnel section ring and a foundation of a tunnel structure surrounding it |
-
2018
- 2018-06-05 CN CN201810566508.6A patent/CN108706921A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07291703A (en) * | 1994-04-18 | 1995-11-07 | Chichibu Onoda Cement Corp | Backfillgrouting material |
| CN102503271A (en) * | 2011-10-31 | 2012-06-20 | 广东基础新世纪混凝土有限公司 | C10 self-compacting concrete and preparation method for same |
| CN102425425A (en) * | 2011-12-26 | 2012-04-25 | 中铁四局集团有限公司 | Working face reinforcing structure in shield machine cabin as well as construction method and equipment thereof |
| CN202370529U (en) * | 2011-12-26 | 2012-08-08 | 中铁四局集团有限公司 | Tunnel face reinforced structure inside cabin of shield machine |
| CN102617073A (en) * | 2012-01-20 | 2012-08-01 | 北京新奥混凝土集团有限公司 | Plastic concrete for cutoff wall |
| EP3048243A1 (en) * | 2015-01-20 | 2016-07-27 | MC-Bauchemie Müller GmbH & Co. Chemische Fabriken | Method for filling a ring area between the outer surface of a tunnel section ring and a foundation of a tunnel structure surrounding it |
| CN105399373A (en) * | 2015-11-26 | 2016-03-16 | 中国建筑第六工程局有限公司 | Backfill material for shield method construction |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109704658A (en) * | 2019-01-28 | 2019-05-03 | 上海城建物资有限公司 | Cutting free concrete |
| CN109704658B (en) * | 2019-01-28 | 2021-08-17 | 上海城建物资有限公司 | Free-cutting concrete |
| CN110835258A (en) * | 2019-10-31 | 2020-02-25 | 中铁二局集团有限公司 | Shield receiving steel sleeve backfill material and preparation method thereof |
| CN110818351A (en) * | 2019-11-19 | 2020-02-21 | 中铁大桥局第七工程有限公司 | Plastic concrete for runner cushion layer and preparation method thereof |
| CN114961790A (en) * | 2022-05-27 | 2022-08-30 | 中南大学 | Shield synchronous grouting construction method and construction effect evaluation method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181026 |
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| RJ01 | Rejection of invention patent application after publication |