CN102748036A - Slurry proportioning and construction method for reinforcing dry powder fine sand layer tunnel - Google Patents
Slurry proportioning and construction method for reinforcing dry powder fine sand layer tunnel Download PDFInfo
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- CN102748036A CN102748036A CN201210226828XA CN201210226828A CN102748036A CN 102748036 A CN102748036 A CN 102748036A CN 201210226828X A CN201210226828X A CN 201210226828XA CN 201210226828 A CN201210226828 A CN 201210226828A CN 102748036 A CN102748036 A CN 102748036A
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Abstract
The invention specifically discloses a slurry proportioning and construction method for reinforcing a dry powder fine sand layer tunnel, and solves the problems that the existing slurry for reinforcing a dry powder fine sand layer tunnel is difficult to disperse and slow to solidify and causes great risk. A horizontal jet grouting pile is manufactured by the following steps: a, the slurry is prepared from the following raw materials in parts by mass: 100 parts of water, 90-110 parts of cement and 10-30 parts of bentonite; b, the jet grouting pressure of the slurry in a high-pressure injection pump is 38-42MPa, the diameter of a spray head of a drill rod is 2.5-3.0mm, and the rotation speed of the drill rod is 12-16rpm; and c, the retraction speed of the drill rod in the jet grouting process is 20-30cm/min. An inclined jet grouting pile is manufactured by the following steps: a, the slurry is prepared from the following raw materials in parts by mass: 100 parts of water, 40-80 parts of cement and 10-30 parts of bentonite; b, the jet grouting pressure of the slurry in a high-pressure injection pump is 25-30MPa, the diameter of a spray head of a drill rod is 2.0-2.5mm, and the rotation speed of the drill rod is 12-16rpm; and c, the retraction speed of the drill rod in the jet grouting process is 15-20cm/min. With the slurry proportion, the method disclosed by the invention realizes good permeability, uniform dispersion and obvious solidification result in the dry powder fine sand layer tunnel.
Description
Technical field
The present invention relates to tunnel stratum consolidation method, be specially a kind of grout coordinate ratio and job practices of reinforcing xeraphium fine sand layer tunnel.
Background technology
Along with the fast development of China Express Railway, highway, underground construction, usually can run into xeraphium fine sand stratum in the constructing tunnel, this type of stratum is highly sensitive, thixotropy is strong; In work progress, if disturbance very easily takes place to leak sand and gush the sand phenomenon; Form accumulation body in short time; Have no the blocking time of sealing, construction progress is very slow, and the duration has a big risk; Concurrently injected slurries are difficult for diffusion, the fixed effect that can't play glued layer of sand slowly.
Summary of the invention
The present invention exists slurries to be difficult for diffusion, the fixed slow and problem that has a big risk in order to solve the existing slurries that adopt in xeraphium fine sand layer tunnel of reinforcing, and a kind of grout coordinate ratio and job practices of reinforcing xeraphium fine sand layer tunnel is provided.
The present invention adopts following technical scheme to realize: the grout coordinate ratio and the job practices of reinforcing xeraphium fine sand layer tunnel; Comprise horizontal jet grouting stake and the oblique rotary churning pile of doing tight interlock executed in xeraphium fine sand layer tunnel; The horizontal jet grouting stake adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 100-150 rev/min speed stirring; Said slurries are to be processed by the raw material of following mass fraction: 100 parts in water, cement 90-110 part, swell soil 10-30 part; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 38-42MPa, and drilling rod shower nozzle diameter is 2.5-3.0mm, and rod rotation speed is 12-16 rev/min; The speed that drilling rod withdraws from c, the churning process is 20-30cm/min;
Oblique rotary churning pile adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 100-150 rev/min speed stirring, and said slurries are to be processed by the raw material of following mass fraction: 100 parts in water, cement 40-80 part, swell soil 10-30 part; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 25-30MPa, and drilling rod shower nozzle diameter is 2.0-2.5mm, and rod rotation speed is 12-16 rev/min; The speed that drilling rod withdraws from c, the churning process is 15-20cm/min.
Related parameter and the grout coordinate ratio of slurries churning combines the site operation progress to draw through repeatedly trying the type that is made in the tunnel stratum consolidation method; Construct the arch rigid body fast at tunnel tunnel face front in the construction; Support upper load; Alleviate the load that passes in face and the supporting, control is excavated the distortion that causes and is prevented to cave in the generation of phenomenon.
The raw material that also comprises following mass fraction in the slurries: accelerating admixture 0.4-3.0 part, adjust time of setting according to construction speed, accelerate slurry consolidation speed.
Reinforce the grout coordinate ratio and the job practices in xeraphium fine sand layer tunnel; The horizontal jet grouting stake adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 120 rev/mins speed stirring; Said slurries are to be processed by the raw material of following mass fraction: 100 parts in water; 100 parts of cement, 10 parts of swell soils; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 39MPa, and drilling rod shower nozzle diameter is 2.8mm, and rod rotation speed is 15 rev/mins; The speed that drilling rod withdraws from c, the churning process is 27cm/min;
Oblique rotary churning pile adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 130 rev/mins speed stirring, and said slurries are to be processed by the raw material of following mass fraction: 100 parts in water, 50 parts of cement, 30 parts of swell soils; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 28MPa, and drilling rod shower nozzle diameter is 2.2mm, and rod rotation speed is 13 rev/mins; The speed that drilling rod withdraws from c, the churning process is 16cm/min, has further improved tunnel stratum consolidation effect, and permeance property further improves, more uniform diffusion.
Grout coordinate ratio good penetrability in xeraphium fine sand layer tunnel that the present invention adopts, even diffused, consolidation effect is obvious; Swell soil lubricate in slurries, is arranged when reaching back brill in churning boring; Should not block commentaries on classics, and guarantee strength of the mixing pile, when improving work efficiency; The overfall amount reduces, and practices thrift cost.
The specific embodiment
Reinforce the grout coordinate ratio and the job practices in xeraphium fine sand layer tunnel; Comprise horizontal jet grouting stake and the oblique rotary churning pile of doing tight interlock executed in xeraphium fine sand layer tunnel; The horizontal jet grouting stake adopts following steps to execute work: a, slurries insert mixer with 100, the speed of (110,130 or 150) rev/min stirs the back and gets into high-pressure injection pump; Said slurries are to be processed by the raw material of following mass fraction: 100 parts in water; Cement 90, (97,102 or 110) part, swell soil 10, (17,21 or 30) part; Slurries in the b, high-pressure injection pump are through the borer drill rod churning, and churning pressure is 38, (39,40 or 42) MPa, and drilling rod shower nozzle diameter is 2.5, (2.7,2.8 or 3.0) mm, and rod rotation speed is 12, (13,14 or 16) rev/min; The speed that drilling rod withdraws from c, the churning process is 20, (22,25 or 30) cm/min;
Oblique rotary churning pile adopts following steps to execute work: a, slurries insert mixer with 100, the speed of (110,120 or 150) rev/min stirs the back and gets into high-pressure injection pump; Said slurries are to be processed by the raw material of following mass fraction: 100 parts in water; Cement 40, (51,68 or 80) part, swell soil 10, (21,26 or 30) part; Slurries in the b, high-pressure injection pump are through the borer drill rod churning, and churning pressure is 25, (27,29 or 30) MPa, and drilling rod shower nozzle diameter is 2.0, (2.2,2.3 or 2.5) mm, and rod rotation speed is 12, (14,15 or 16) rev/min; The speed that drilling rod withdraws from c, the churning process is 15, (17,18 or 20) cm/min.
The raw material that also comprises following mass fraction in the slurries: accelerating admixture 0.4, (1.1,2.5 or 3.0) part; Reinforce the grout coordinate ratio and the job practices in xeraphium fine sand layer tunnel; The horizontal jet grouting stake adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 120 rev/mins speed stirring; Said slurries are to be processed by the raw material of following mass fraction: 100 parts in water; 100 parts of cement, 10 parts of swell soils; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 39MPa, and drilling rod shower nozzle diameter is 2.8mm, and rod rotation speed is 15 rev/mins; The speed that drilling rod withdraws from c, the churning process is 27cm/min;
Oblique rotary churning pile adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 130 rev/mins speed stirring, and said slurries are to be processed by the raw material of following mass fraction: 100 parts in water, 50 parts of cement, 30 parts of swell soils; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 28MPa, and drilling rod shower nozzle diameter is 2.2mm, and rod rotation speed is 13 rev/mins; The speed that drilling rod withdraws from c, the churning process is 16cm/min.
Claims (3)
1. a grout coordinate ratio and job practices of reinforcing xeraphium fine sand layer tunnel; Comprise horizontal jet grouting stake and the oblique rotary churning pile of doing tight interlock executed in xeraphium fine sand layer tunnel; It is characterized in that: the horizontal jet grouting stake adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 100-150 rev/min speed stirring; Said slurries are to be processed by the raw material of following mass fraction: 100 parts in water, cement 90-110 part, swell soil 10-30 part; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 38-42MPa, and drilling rod shower nozzle diameter is 2.5-3.0mm, and rod rotation speed is 12-16 rev/min; The speed that drilling rod withdraws from c, the churning process is 20-30cm/min;
Oblique rotary churning pile adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 100-150 rev/min speed stirring, and said slurries are to be processed by the raw material of following mass fraction: 100 parts in water, cement 40-80 part, swell soil 10-30 part; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 25-30MPa, and drilling rod shower nozzle diameter is 2.0-2.5mm, and rod rotation speed is 12-16 rev/min; The speed that drilling rod withdraws from c, the churning process is 15-20cm/min.
2. the grout coordinate ratio and the job practices in reinforcing xeraphium fine sand layer according to claim 1 tunnel is characterized in that: the raw material that also comprises following mass fraction in the slurries: accelerating admixture 0.4-3.0 part.
3. the grout coordinate ratio and the job practices in reinforcing xeraphium fine sand layer according to claim 1 and 2 tunnel; It is characterized in that: the horizontal jet grouting stake adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 120 rev/mins speed stirring; Said slurries are to be processed by the raw material of following mass fraction: 100 parts in water; 100 parts of cement, 10 parts of swell soils; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 39MPa, and drilling rod shower nozzle diameter is 2.8mm, and rod rotation speed is 15 rev/mins; The speed that drilling rod withdraws from c, the churning process is 27cm/min;
Oblique rotary churning pile adopts following steps to execute work: a, slurries are inserted mixer with the back high-pressure injection pump that gets into of 130 rev/mins speed stirring, and said slurries are to be processed by the raw material of following mass fraction: 100 parts in water, 50 parts of cement, 30 parts of swell soils; Slurries in b, the high-pressure injection pump are through the borer drill rod churning, and churning pressure is 28MPa, and drilling rod shower nozzle diameter is 2.2mm, and rod rotation speed is 13 rev/mins; The speed that drilling rod withdraws from c, the churning process is 16cm/min.
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| CN201210226828.XA CN102748036B (en) | 2012-07-03 | 2012-07-03 | Slurry proportioning and construction method for reinforcing dry powder fine sand layer tunnel |
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| CN201210226828.XA CN102748036B (en) | 2012-07-03 | 2012-07-03 | Slurry proportioning and construction method for reinforcing dry powder fine sand layer tunnel |
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| CN102748036A true CN102748036A (en) | 2012-10-24 |
| CN102748036B CN102748036B (en) | 2015-04-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103883332A (en) * | 2014-02-28 | 2014-06-25 | 北京市市政工程研究院 | Method and device for reinforcing fine sand layers |
| CN105697025A (en) * | 2016-03-29 | 2016-06-22 | 中铁隧道股份有限公司 | Escape device of bentonite improving shield tunneling machine and construction method thereof |
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| CN1487150A (en) * | 2003-04-16 | 2004-04-07 | 广东省建筑科学研究院 | Combined grouting construction process of reinforcing foundation |
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- 2012-07-03 CN CN201210226828.XA patent/CN102748036B/en active Active
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| CN1504613A (en) * | 2002-12-04 | 2004-06-16 | 何庆林 | Forming method for water-proof pile fender and screw drill therefor |
| CN1487150A (en) * | 2003-04-16 | 2004-04-07 | 广东省建筑科学研究院 | Combined grouting construction process of reinforcing foundation |
| CN101245599A (en) * | 2008-02-28 | 2008-08-20 | 上海市第二市政工程有限公司 | Construction equipment for generating horizontal jet grouting reinforcing body by injecting double-liquid liquid with high-pressure |
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| CN103883332A (en) * | 2014-02-28 | 2014-06-25 | 北京市市政工程研究院 | Method and device for reinforcing fine sand layers |
| CN103883332B (en) * | 2014-02-28 | 2016-08-17 | 北京市市政工程研究院 | Thin silt reinforcement means and device |
| CN105697025A (en) * | 2016-03-29 | 2016-06-22 | 中铁隧道股份有限公司 | Escape device of bentonite improving shield tunneling machine and construction method thereof |
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| CN102748036B (en) | 2015-04-22 |
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