CN1508392A - Vertical pipe vacuum pre pressing bidirectional slip casting method and sealed slip casting system thereof - Google Patents
Vertical pipe vacuum pre pressing bidirectional slip casting method and sealed slip casting system thereof Download PDFInfo
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- CN1508392A CN1508392A CNA021562814A CN02156281A CN1508392A CN 1508392 A CN1508392 A CN 1508392A CN A021562814 A CNA021562814 A CN A021562814A CN 02156281 A CN02156281 A CN 02156281A CN 1508392 A CN1508392 A CN 1508392A
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Abstract
The invention is a vertical-tube vacuum-precompression bidirectional slip casting method, comprising the steps of making hole, installing seal slip casting system, sealing orifice, normal-pressure slip casting, prevacuumizing, vacuum slip casting, reverse slip casting, and so on; the seal slip casting system includes anchor hole, anchorage cable, orifice grout sealer, vacuum pump, slip casting pump, sealing plate, slip casting tube and vacuum tube, the orifice grout sealer situated at the orifice of the anchor hole, the sealing plate situated on the end surface of the orifice, epoxy resin poured between the sealing plate and the orifice grout sealer, the orifice grout sealer being bowl-structured, and one or more orifice grout sealers linked in series in the same or counter direction and closely fitting anchor hole wall, the vacuum tube passing through the sealing plate and the orifice grout sealer to reach the top of the anchor hole, and the slip casting tube passing through the orifice grout sealer and 30-40cm higher than the internal end surface of the orifice grout sealer.
Description
One, technical field:
The present invention relates to a kind of job practices, particularly a kind of slip casting construction method and sealing filling system thereof that the construction prestressed cable of certain vertical angle is arranged.
Two, background technology:
In present underground geotechnical engineering practice, because stability, the life requirement of engineerings such as its underground chamber, traffic tunnel and military cave storehouse must be taked supporting measure to country rock.Although the means of supporting and the worker's method that applies have nothing in common with each other, but all should include anchor pole or anchor cable from the comprehensive consideration of supporting content, apply the anchor pole or the anchor cable of 0 ~ 180 (counterclockwise)---the common pressure grouting worker method at the bottom of the prestress anchorage cable of certain vertical angle or anchor pole generally all adopt from the aperture to the hole is promptly arranged, but because " air cushion " on duct slip casting leakiness and top, duct effect, sealing performance is good inadequately, often is directed at the excessive and anchor cable body of stress loss and loses efficacy because of premature corrosion.
The 99118694X application for a patent for invention discloses a kind of vacuum grouting process and sealed anchor cable thereof, it is used for the post stretching system of bridge reserving hole channel, the aperture generally is horizontal arrangement, belong to horizontal vacuum grouting, the sealing anchor cable is in a kind of bridge or external drag-line, what adopt is that the mode that reserving hole channel adds protective cover forms closed state, is unidirectional grout, i.e. slip casting from one end to the other side; Solved in the bridge or the slip casting problem of external drag-line, but inapplicable to the elevation angle slip casting of prestress anchorage cable that certain vertical angle is arranged on the engineerings such as underground geotechnical engineering such as underground chamber, traffic tunnel and military cave storehouse or anchor pole.
Three, summary of the invention:
Technical problem to be solved by this invention is: the common pressure grouting worker method at the bottom of vertical angle slip casting is adopted from the aperture to the hole in the existing underground geotechnical engineering practice, but because " air cushion " on duct slip casting leakiness and top, duct effect, sealing performance is good inadequately, often is directed at the problem that stress loss is excessive and the anchor cable body lost efficacy because of premature corrosion; Provide a kind of injection speed fast, can effectively eliminate " air cushion " in duct, make the duct slurry more even, closely knit, the sealing system good seal performance, can improve the antiseptic effect of anchor cable cable body effectively, guarantee the two-way slip casting construction method of vertical tube vacuum preloading and the sealing filling system thereof of the long-term functional performance of anchor cable cable body.
Its technical scheme of dealing with problems is: the sealing filling system that adopts vacuum pressure slip casting, vacuum preloading and two-way slurry injection technique and band grout stopping device.
Its concrete technical scheme is:
The two-way slip casting construction method of a kind of vertical tube vacuum preloading comprises following activities:
A, make anchor hole;
B, installation sealing filling system be equipment partly:
B1: anchor cable is installed;
B2: the aperture grout stopping device is installed;
B3: vacuum pump, negative-pressure container, grouting pump are installed;
C, seal orifice:, the sealing plate seal orifice is installed with the junction of epoxy bond grout stopping device, aperture end face and hole wall and anchor cable presstressed reinforcing steel;
D, common pressure grouting: under normal pressure, inject one section rapid hardening slurry in advance by Grouting Pipe, the distance of this slurry minimum level and grout stopping device is at least 10～20cm, is determining to close the Grouting Pipe valve under the unimpeded situation in Grouting Pipe and duct;
E, forvacuum: after the rapid hardening slurry initial set of common pressure grouting, opening the vacuum tube valve will vacuumize in the anchor hole;
F, vacuum injection: after vacuum reaches 0.1MPa in the anchor hole, start grouting pump earlier, open the Grouting Pipe valve again and begin slip casting, while vacuumizing slip casting, when underflow flows in the negative-pressure container, close Grouting Pipe and vacuum tube valve from vacuum tube, and close vacuum pump, stop slip casting;
G, oppositely slip casting: the filling adaptor and the vacuum tube of grouting pump are joined, start grouting pump, open the vacuum tube valve, continue slip casting, before the slurry initial set, finish slip casting with pressure.
Comprise anchor hole with the matching used sealing filling system of the two-way slurry injection technique of vertical tube vacuum preloading of the present invention, anchor cable, the aperture grout stopping device, grouting pump, vacuum pump, sealing plate, Grouting Pipe and vacuum tube, the aperture grout stopping device is positioned at the aperture of anchor hole, sealing plate is positioned on the end face of aperture, the epoxy resin that perfusion seals between sealing plate and the aperture grout stopping device, the aperture grout stopping device is a bowl formula structure, in the same way one or more or differential concatenation, with anchor hole wall tight fit, be drilled with 2～72 and the institute's anchoring steel strand quantity and the corresponding to manhole of arranging respectively on sealing plate and the bowl formula grout stopping device, in addition, also be drilled with the through hole that Grouting Pipe and vacuum tube are installed on the sealing plate, be drilled with the screw that Grouting Pipe and vacuum tube are installed on the bowl formula grout stopping device, vacuum tube one end links to each other with vacuum pump, the other end passes the top of the through anchor hole of bearing plate of bowl formula grout stopping device and anchor cable, Grouting Pipe one end links to each other with grouting pump, and the other end passes a bowl formula grout stopping device and exceeds its inner face 30～40cm.
Described aperture grout stopping device is by upper sealing panel, the outer slurry cover that ends, the steel internal layer ends the slurry cover, the lower seal plate constitutes, it is that cross section is circular that the steel internal layer ends the slurry cover, the longitudinal section is irregular polygonal cylinder, at the cylinder middle part one elastic groove is arranged, on it, respectively there is a groove bottom, on, the lower seal plate embeds respectively in this groove, on, lower seal plate and internal layer are only starched to put and are drilled with 2～72 and the institute's anchoring steel strand quantity and the corresponding to manhole of arranging respectively, on, also be drilled with the manhole that Grouting Pipe and vacuum tube are installed on the lower seal plate, internal layer ends slurry and puts two screws that are drilled with installation Grouting Pipe and vacuum tube, the outer slurry hard-pressed bale that is locked that ends overlays on internal layer and ends slurry cover outside, whole formation one cross section is circular, the longitudinal section is trapezoidal bowl formula structure, internal layer ends the general steel metal material of using of slurry cover to be made, and the outer slurry that ends is applied mechanically rubber, compounded rubber, elastoplast and so on has certain flexible nonmetals to be made.
Because sealing system of the present invention has the aperture grout stopping device that seals in the aperture of anchor hole---bowl formula grout stopping device, by drilling equipment in geotechnical body behind the pore-forming, with high performance bowl formula grout stopping device seal orifice, form the high rapid hardening slurry of about 10 ~ 20cm in the grout stopping device upper end by common pressure grouting, use the epoxy bond grout stopping device, the junction of aperture end face and hole wall and anchor cable presstressed reinforcing steel, and utilize the vacuum preloading effect to make hole wall sealing and make it become sealed anchor cable, vacuum tube and Grouting Pipe all have control valve, make it can be at any time and grouting pump, vacuum pump switches; Adopt the two-way slurry injection technique of this vacuum preloading, before slip casting, the air more than 90% in the anchor hole is drawn out of, because the existence of negative pressure in the duct produces seepage flow between duct external and internal pressure official post country rock and the anchor hole wall, the pore water pressure of country rock is constantly reduced, effective stress constantly increases, thereby impels country rock fixed, has strengthened the globality of country rock, promote the vacuum raising conversely, reached the precompressed effect; Because vacuum preloading does not change the total stress of country rock basically, so the restriction that the loading of vacuum preloading does not take time, vacuum can disposablely add, need not to consider the intensity and the stability problem of country rock; In addition, the existence of vacuum tube in the hole, make the little air of slip casting latter end remnants be difficult to form " air cushion " effect, after once grouting stops, before the slurry initial set, utilizing vacuum tube to carry out pressure reversal slip casting, oppositely slip casting is along with the growth of vacuum application time, the duct inside and outside differential pressure diminishes gradually, finally trend towards zero, along with fading away of vacuum, slurry redundant moisture and duct residual air oppositely are being diffused in the country rock hole of duct latter end under the effect of injecting cement paste pressure.
Thereby, to compare with slip casting method in the past, the two-way slurry injection technique of vacuum preloading has following advantage:
1, substitutes stack with vacuum tube, eliminated and solved exhausting problem with the way of inserting stack in the past, improved injection speed;
2, vacuum pressure grouting belongs to high pressure grouting, makes that the duct slurry is more closely knit, and slurry intensity is higher;
3, owing to adopt the method for forvacuum, make geotechnical body be subjected to certain vacuum preloading effect, near the country rock the anchor hole has also been played certain consolidation, thereby strengthened the globality of country rock, improve the cohesion and the angle of internal friction of country rock, increased the self-supporting ability of country rock;
4, the two-way grouting technique of grouting latter end employing can effectively be eliminated " air cushion " in duct, makes the duct slurry more even;
5, only starch effective: a bowl formula grout stopping device can provide certain frictional resistance, can locate anchor cable temporarily, and can by several bowls of formula grout stopping devices in the same way or differential concatenation adjust the size of frictional resistance, effectively end slurry.
6, sealing is reliable: the bowl formula grout stopping device in sealing anchor hole aperture and the rapid hardening slurry of upper end thereof can effectively remedy the aperture error that boring causes, make the aperture sealing, and make whole anchor cable be in whole sealing status by the vacuum preloading effect, improve the antiseptic effect of anchor cable body effectively, helped guaranteeing the long-term functional performance of anchor cable cable body.
Below in conjunction with drawings and Examples, to the two-way slurry injection technique of the present invention's vacuum preloading and the sealing filling system technical characterictic be further described:
Four, description of drawings:
Fig. 1: the two-way slip casting construction method process chart of the present invention's vertical tube vacuum preloading;
Fig. 2: the present invention's sealing system structure and scheme of installation;
Fig. 3: aperture grout stopping device structural representation (the main sectional view of looking);
Fig. 4: aperture grout stopping device structural representation (vertical view).
Five: the specific embodiment:
Embodiment:
The two-way slip casting construction method of a kind of vertical tube vacuum preloading comprises following key step:
A, make anchor hole: cutter straight up or anchor hole obliquely on country rock;
B, installation sealing filling system be equipment partly:
B1: anchor cable is installed: by Fig. 2 anchor cable and each annex, vacuum tube are installed, and colligation is firm, sends in the anchor hole anchor cable is straight;
B2: the bowl formula grout stopping device that aperture grout stopping device, mounting strap Grouting Pipe are installed;
B3: vacuum pump, negative-pressure container, grouting pump are installed;
C, seal orifice:, the sealing plate seal orifice is installed with the junction of epoxy bond grout stopping device, aperture end face and hole wall and anchor cable presstressed reinforcing steel;
D, common pressure grouting: under normal pressure, inject one section rapid hardening slurry in advance by Grouting Pipe, the distance of this slurry minimum level and grout stopping device is at least 10～20cm, is determining to close the Grouting Pipe valve under the unimpeded situation in Grouting Pipe and duct;
E, forvacuum: after the rapid hardening slurry initial set of common pressure grouting, opening the vacuum tube valve will be evacuated in the anchor hole;
F, vacuum injection: after vacuum reaches 0.1MPa in the anchor hole, start grouting pump earlier, open the Grouting Pipe valve again and begin slip casting, while vacuumizing slip casting, when underflow flows in the negative-pressure container, close Grouting Pipe and vacuum tube valve from vacuum tube, and close vacuum pump, stop slip casting;
G, oppositely slip casting: the filling adaptor and the vacuum tube of grouting pump are joined, start grouting pump, open the vacuum tube valve, continue slip casting, before the slurry initial set, finish slip casting with pressure.
As a kind of conversion of the embodiment of the invention, described aperture grout stopping device 4 also can adopt 1 or 3～10 bowl formula grout stopping devices according to requirement of engineering, and its connected mode can be a series aiding connection, also can be differential concatenation.
As a kind of conversion of the embodiment of the invention, described anchor cable 1 also can be the pressure-type anchor cable or the tension type anchor cable of other types.
Described aperture grout stopping device is by upper sealing panel 14, the outer slurry cover 15 that ends, the steel internal layer ends slurry cover 16, lower seal plate 17 constitutes, it is that cross section is circular that the steel internal layer ends slurry cover 16, the longitudinal section is irregular polygonal cylinder, at the cylinder middle part one elastic groove is arranged, on it, respectively there is a groove bottom, on, the lower seal plate embeds respectively in this groove, on, lower seal plate 14,17 and internal layer end be drilled with respectively on the slurry cover 16 2～72 with the institute's anchoring steel strand quantity and the corresponding to manhole of arranging, on, lower seal plate 14, also be drilled with the manhole that Grouting Pipe and vacuum tube are installed on 17, internal layer ends two screws that are drilled with installation Grouting Pipe and vacuum tube on the slurry cover 16, the outer slurry cover 15 that ends tightly is coated on internal layer and ends slurry cover 16 outsides, and whole to constitute a cross section be circle, the longitudinal section is that trapezoidal bowl formula structure is (referring to Fig. 3, Fig. 4).
Internal layer only slurry cover 16 is general with the making of steel metal material, and outer slurry cover 15 usefulness rubber, compounded rubber, elastoplast and so on of ending has certain flexible nonmetals making.
As a kind of conversion of the embodiment of the invention, the above-mentioned two-way slip casting construction method of vertical tube vacuum preloading also is applicable to the construction of the prestressed anchor of certain vertical angle, and the anchor cable in the described sealing system changes anchor pole at this moment.
Claims (3)
1, the two-way slip casting construction method of a kind of vertical tube vacuum preloading is characterized in that; This worker's method comprises following key step:
The two-way slip casting construction method of a kind of vertical tube vacuum preloading comprises following key step:
A, make anchor hole: cutter straight up or anchor hole obliquely on country rock;
B, installation sealing filling system be equipment partly:
B1: anchor cable is installed: anchor cable and each annex, vacuum tube are installed, and colligation is firm, sends in the anchor hole anchor cable is straight;
B2: the bowl formula grout stopping device that aperture grout stopping device, mounting strap Grouting Pipe are installed;
B3: vacuum pump, negative-pressure container, grouting pump are installed;
C, seal orifice:, the sealing plate seal orifice is installed with the junction of epoxy bond grout stopping device, aperture end face and hole wall and anchor cable presstressed reinforcing steel;
D, common pressure grouting: under normal pressure, inject one section rapid hardening slurry in advance by Grouting Pipe, the distance of this slurry minimum level and grout stopping device is at least 10～20cm, is determining to close the Grouting Pipe valve under the unimpeded situation in Grouting Pipe and duct;
E, forvacuum: after the rapid hardening slurry initial set of common pressure grouting, opening the vacuum tube valve will be evacuated in the anchor hole;
F, vacuum injection: after vacuum reaches 0.1MPa in the anchor hole, start grouting pump earlier, open the Grouting Pipe valve again and begin slip casting, while vacuumizing slip casting, when underflow flows in the negative-pressure container, close Grouting Pipe and vacuum tube valve from vacuum tube, and close vacuum pump, stop slip casting;
G, oppositely slip casting: the filling adaptor and the vacuum tube of grouting pump are joined, start grouting pump, open the vacuum tube valve, continue slip casting, before the slurry initial set, finish slip casting with pressure.
2, the matching used sealing filling system of the two-way grouting construction method of vertical tube vacuum preloading as claimed in claim 1, it is characterized in that: the sealing filling system comprises anchor hole (3), anchor cable (1), aperture grout stopping device (4), grouting pump (6), vacuum pump (8), sealing plate (10), Grouting Pipe (5) and vacuum tube (9), aperture grout stopping device (4) is positioned at the aperture of anchor hole (3), sealing plate (10) is positioned at the aperture end face, the epoxy resin (11) that perfusion seals between sealing plate (10) and the aperture grout stopping device (4), aperture grout stopping device (4) is a bowl formula structure, 1 or 2～10 are in the same way or differential concatenation, with anchor hole (3) hole wall tight fit, be drilled with 2～72 and the institute's anchoring steel strand quantity and the corresponding to manhole of arranging respectively on sealing plate (10) and the bowl formula grout stopping device (4), in addition, also be drilled with the through hole that Grouting Pipe and vacuum tube are installed on the sealing plate (10), be drilled with the screw that installs and fixes Grouting Pipe and vacuum tube on the bowl formula grout stopping device (4), vacuum tube (9) one ends link to each other with vacuum pump (8), the other end passes sealing plate (10), the top of the through anchor hole (3) of the bearing plate of bowl formula grout stopping device (4) and anchor cable (1), Grouting Pipe (5) one ends link to each other with grouting pump (6), and the other end passes sealing plate (10), bowl formula grout stopping device (4) exceeds its inner face 30～40cm.
3, the two-way grouting construction method of vertical tube vacuum preloading as claimed in claim 2 the aperture grout stopping device in the matching used sealing filling system, it is characterized in that: described aperture grout stopping device is by upper sealing panel (14), the outer slurry cover (15) that ends, the steel internal layer ends slurry cover (16), lower seal plate (17) constitutes, it is that cross section is circular that the steel internal layer ends slurry cover (16), the longitudinal section is irregular polygonal cylinder, at the cylinder middle part one elastic groove is arranged, on it, respectively there is a groove bottom, on, the lower seal plate embeds respectively in this groove, on, lower seal plate (14), (17) and internal layer end be drilled with respectively on the slurry cover (16) 2～72 with the institute's anchoring steel strand quantity and the corresponding to manhole of arranging, on, lower seal plate (14), (17) also be drilled with the manhole that Grouting Pipe and vacuum tube are installed on, internal layer ends two screws that are drilled with installation Grouting Pipe and vacuum tube on the slurry cover (16), the outer slurry cover (15) that ends tightly is coated on only slurry cover (16) outside of internal layer, and whole formation one cross section is circular, the longitudinal section is trapezoidal bowl formula structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021562814A CN100398782C (en) | 2002-12-16 | 2002-12-16 | Vertical pipe vacuum pre pressing bidirectional slip casting method and sealed slip casting system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021562814A CN100398782C (en) | 2002-12-16 | 2002-12-16 | Vertical pipe vacuum pre pressing bidirectional slip casting method and sealed slip casting system thereof |
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| Publication Number | Publication Date |
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| CN1508392A true CN1508392A (en) | 2004-06-30 |
| CN100398782C CN100398782C (en) | 2008-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021562814A Expired - Fee Related CN100398782C (en) | 2002-12-16 | 2002-12-16 | Vertical pipe vacuum pre pressing bidirectional slip casting method and sealed slip casting system thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889068A (en) * | 2012-11-02 | 2013-01-23 | 淮南矿业(集团)有限责任公司 | Hole sealing device and method |
| CN106246135A (en) * | 2016-08-31 | 2016-12-21 | 重庆松藻煤电有限责任公司 | A kind of quickly pocket type filter press seal aperture apparatus and method |
| CN109914804A (en) * | 2019-02-28 | 2019-06-21 | 常熟建工建设集团有限公司 | A kind of assembled architecture top grouting process |
| CN110514811A (en) * | 2019-08-29 | 2019-11-29 | 山东科技大学 | A kind of indoor simulation grouting and reinforcing experimental rig and method |
| CN112144511A (en) * | 2020-09-24 | 2020-12-29 | 中国一冶集团有限公司 | Vacuum-assisted post grouting device and method for cast-in-situ bored pile |
| CN112459071A (en) * | 2020-11-30 | 2021-03-09 | 中国一冶集团有限公司 | Vacuum grouting device for cast-in-situ bored pile and construction method |
| CN114411827A (en) * | 2022-01-12 | 2022-04-29 | 西安理工大学 | Vacuum prepressing microorganism grouting rib composite pile foundation model for foundation stabilization |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2657202C3 (en) * | 1976-12-17 | 1979-05-23 | Dyckerhoff & Widmann Ag, 8000 Muenchen | Coupling point for a post-tensioning bundle tendon for prestressed concrete |
| DE4433847C2 (en) * | 1994-09-22 | 1997-09-25 | Dyckerhoff & Widmann Ag | Method for introducing a potting compound into a cavity |
| CN1122745C (en) * | 1998-06-08 | 2003-10-01 | 中外合资柳州欧维姆建筑机械有限公司 | Pull-pressure dispersed protecting anchor cable and its construction method |
| CN100353518C (en) * | 2004-12-08 | 2007-12-05 | 上海华虹Nec电子有限公司 | Method for determining chemical mechanical milling tech. window in shallow slot isolation tech. |
-
2002
- 2002-12-16 CN CNB021562814A patent/CN100398782C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889068A (en) * | 2012-11-02 | 2013-01-23 | 淮南矿业(集团)有限责任公司 | Hole sealing device and method |
| CN106246135A (en) * | 2016-08-31 | 2016-12-21 | 重庆松藻煤电有限责任公司 | A kind of quickly pocket type filter press seal aperture apparatus and method |
| CN106246135B (en) * | 2016-08-31 | 2018-09-28 | 重庆能投渝新能源有限公司 | A kind of quick pocket type filtering pressure hole sealing device and method |
| CN109914804A (en) * | 2019-02-28 | 2019-06-21 | 常熟建工建设集团有限公司 | A kind of assembled architecture top grouting process |
| CN110514811A (en) * | 2019-08-29 | 2019-11-29 | 山东科技大学 | A kind of indoor simulation grouting and reinforcing experimental rig and method |
| CN112144511A (en) * | 2020-09-24 | 2020-12-29 | 中国一冶集团有限公司 | Vacuum-assisted post grouting device and method for cast-in-situ bored pile |
| CN112459071A (en) * | 2020-11-30 | 2021-03-09 | 中国一冶集团有限公司 | Vacuum grouting device for cast-in-situ bored pile and construction method |
| CN112459071B (en) * | 2020-11-30 | 2022-05-10 | 中国一冶集团有限公司 | Vacuum grouting device for cast-in-situ bored pile and construction method |
| CN114411827A (en) * | 2022-01-12 | 2022-04-29 | 西安理工大学 | Vacuum prepressing microorganism grouting rib composite pile foundation model for foundation stabilization |
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| Publication number | Publication date |
|---|---|
| CN100398782C (en) | 2008-07-02 |
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