CN107630452A - Construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod - Google Patents
Construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod Download PDFInfo
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- CN107630452A CN107630452A CN201710735131.8A CN201710735131A CN107630452A CN 107630452 A CN107630452 A CN 107630452A CN 201710735131 A CN201710735131 A CN 201710735131A CN 107630452 A CN107630452 A CN 107630452A
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- bolthole
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Abstract
The invention discloses a kind of construction method of bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod, comprise the following steps：Closure anchor pole aperture, and the embedded Grouting Pipe in sealing are not leaked by rapid-curing cutback cement and water；Underwater double-liquid high pressure slip-casting is carried out to bolthole using cement mortar and accelerator by Grouting Pipe, rock crack is blocked with Fast Filling rapid hardening, extruding excludes rock crack water and bolthole internal water accumulation, slurry is filled bolthole and is formed anchoring body with anchor pole and reaches anti-floating effect.Construction method of the bedrock fracture proposed by the present invention development rich in the underwater slip casting of underground water anti-float anchor rod, realizes to exist in bolthole and carries out slip casting in the case of artesian water.
Description
Technical field
The present invention relates to bolt grouting technical field, more particularly to a kind of development of bedrock fracture to be rich in underground water anti-float anchor rod
The construction method of underwater slip casting.
Background technology
Constantly ripe with Base hole supporting technology, foundation depth is constantly deepened, rich groundwater, and building need to have anti-floating to arrange
Apply, anti-float anchor rod is small because being related to construction machinery, can the operations simultaneously of more machineries, flexible easy to operate, cost small to rock stratum perturbation
Low, speed of application is fast, and the cycle is short, more and more to be employed in engineering.But if deep basal pit formation geology situation is complicated, basement rock splits
Gap development is rich in underground water, and how to ensure the underwater slip casting pore-forming of anti-float anchor rod is the difficult point and emphasis of construction.
The content of the invention
It is a primary object of the present invention to provide a kind of bedrock fracture development to be rich in the underwater slip casting of underground water anti-float anchor rod
Construction method, it is intended to which realization carries out slip casting in the case of artesian water in bolthole being present.
To achieve the above object, the present invention provides a kind of bedrock fracture development and is rich in the underwater slip casting of underground water anti-float anchor rod
Construction method, comprise the following steps：
Closure anchor pole aperture, and the embedded Grouting Pipe in sealing are not leaked by rapid-curing cutback cement and water；
Underwater double-liquid high pressure slip-casting is carried out to bolthole using cement mortar and accelerator by Grouting Pipe, sealed with Fast Filling rapid hardening
Stifled rock crack, extruding exclude rock crack water and bolthole internal water accumulation, slurry is filled bolthole and is formed with anchor pole and anchor
Body reaches anti-floating effect.
Preferably, described the step of underwater two fluid grouting is carried out to bolthole using cement mortar and accelerator by Grouting Pipe
Also include afterwards：
After cement mortar and accelerator initial set, secondary high-pressure slip-casting is carried out to bolthole.
Preferably, sighting tube, drainpipe and Grouting Pipe are embedded with sealing, Grouting Pipe is used for slip casting and its end position
In bolthole bottom；Sighting tube is used to observe slip casting situation and its end is located in the middle part of bolthole, and drainpipe is used for draining and two
Secondary slip casting and its end are located at the top of bolthole.
Preferably, when carrying out underwater two fluid grouting to bolthole using cement mortar and accelerator by Grouting Pipe, using hole
The anti-slurry processes in bottom and observation slip casting method.
Preferably, when not leaking closure anchor pole aperture by rapid-curing cutback cement and water, anchor pole aperture is carried out by rapid-curing cutback cement
After once sealing, do not leaked using water and secondary plugging is carried out to anchor pole aperture periphery breakthrough, to meet high-pressure slip-casting plugging strength.
Preferably, anchor pole aperture is carried out before once sealing by rapid-curing cutback cement, to anchor pole aperture top and periphery ponding
Cleared up.
Preferably, the ratio of cement mortar and accelerator is 1:1.
Preferably, when carrying out underwater double-liquid high pressure slip-casting to bolthole using cement mortar and accelerator by Grouting Pipe, when
When sighting tube begins to flow out biliquid slurry, doubling is carried out to sighting tube, colligation sealing is carried out with iron wire；When drainpipe is begun to flow out
During biliquid slurry, doubling is carried out to sighting tube, colligation sealing is carried out with iron wire；When periphery surface bedrock fracture starts grout, stop
Only slip casting, fill periphery rock crack and secondary plugging crack purpose to reach slurries.
Construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod proposed by the present invention, can effectively be solved
Certainly bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod can not pore-forming problem, and whole work progress is related to and applied
Work machinery is small, can the operations simultaneously of more machineries, flexibly easy to operate, low cost, speed of application is fast, and the cycle is short, and substrate rock stratum is disturbed
It is dynamic small, and slurries rapid hardening closure rock crack can reinforce substrate rock stratum, can be that later stage structure construction reserves grace time, ensure knot
Structure construction quality, the duration is saved for integral construction.
Brief description of the drawings
Fig. 1 is construction method of the bedrock fracture of the present invention development rich in the underwater slip casting of underground water anti-float anchor rod in non-slip casting
Structural representation；
Fig. 2 is structure of construction method of the bedrock fracture of the present invention development rich in the underwater slip casting of underground water anti-float anchor rod after slip casting
Schematic diagram.
In figure, 1- cement injections, 2- notes accelerator, 3- sighting tubes, 4- threeways, 5- Grouting Pipes, 6- drainpipes, 7- rapid-curing cutback water
Mud, 8- water do not leak, at the top of 9- basement rock, 10- rock cracks, 11- anchor bar bodies, 12-, in the middle part of 13-, 14- bottoms.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Referring to Figures 1 and 2, in this preferred embodiment, a kind of bedrock fracture development is noted under water rich in underground water anti-float anchor rod
The construction method of slurry, comprises the following steps：
Step S10,8 closure anchor pole apertures, and the embedded Grouting Pipe 5 in sealing are not leaked by rapid-curing cutback cement 7 and water；
Step S20, underwater double-liquid high pressure slip-casting is carried out to bolthole using cement mortar and accelerator by Grouting Pipe 5, with quick
Rapid hardening closure rock crack is filled, extruding excludes rock crack water and bolthole internal water accumulation, slurry is filled bolthole and and anchor
Bar forms anchoring body and reaches anti-floating effect.
Further, step S20 also includes：
Step S30, after cement mortar and accelerator initial set, secondary high-pressure slip-casting is carried out to bolthole.
Contraction is condensed because hardening of cement be present, slurry can sink in bolthole, bedrock fracture leakiness, after initial set, so
Secondary high-pressure slip-casting need to be carried out.After secondary high-pressure slip-casting, tubing termination need to be handled.Because rapid-curing cutback is used in anchor pole aperture in advance
Cement 7 and water do not leak 8 and blocked, and cement mortar chance accelerator rate of set is fast, and three plastics sebific ducts can not be extracted, and spill ground
Termination needs cutoff process, but later stage termination point of anchor rod carries out node waterproof processing with uncured sealing compound, and anchor pole root is not present
Risk of leakage.
Specifically, sighting tube 3, drainpipe 6 and Grouting Pipe 5 are embedded with sealing, Grouting Pipe 5 is used for slip casting and its end
Portion is located at bolthole bottom 14；Sighting tube 3 is used to observe slip casting situation and its end is located at 13 in the middle part of bolthole, and drainpipe 6 is used
It is located in draining and secondary grouting and its end 12 at the top of bolthole.In slip casting, pass through sighting tube 3 and the observation note of drainpipe 6
Slurry situation.When sighting tube 3 begins to flow out biliquid slurry, illustrate that bolthole middle and lower part is already filled with biliquid slurry；When drainpipe 6
When beginning to flow out biliquid slurry, illustrate that whole anchor pole aperture is already filled with biliquid slurry.
When carrying out underwater two fluid grouting to bolthole using cement mortar and accelerator by Grouting Pipe 5, starched using bottom hole is counter
Method and observation slip casting method.Because crevice water is concentrated mainly in the middle part of anchor pole, if using traditional grouting process, from bolthole
The slip casting into anchor pole in the form of gravity, artesian water can break up slurries dilution.If carry out anti-slurry processes slip casting, slurry from anchor pole bottom
The great proportion in water of liquor ratio, accelerator meeting rapid condensation cement mortar formation anchoring body, blocks bedrock fracture in addition.
Specifically, when not leaking 8 closure anchor pole aperture by rapid-curing cutback cement 7 and water, anchor pole aperture is entered by rapid-curing cutback cement 7
After row once seals, do not leak 8 pairs of anchor pole aperture periphery breakthroughs using water and carry out secondary plugging, to meet that high-pressure slip-casting closure is strong
Degree.Anchor pole aperture is carried out before once sealing by rapid-curing cutback cement 7, anchor pole aperture top and periphery ponding are cleared up.Enter
When row once seals, if, it is necessary to which artificial manufacture hot water, which is stirred, can reach rapid hardening effect when outdoor temperature is relatively low.It is simple to use
Rapid-curing cutback cement 7 is unable to reach the firm effect of closure, and connection has gap between reinforcing bar, plastics sebific duct and cement, there is seepage wind
Danger.Do not leak 8 pairs of anchor pole aperture periphery breakthroughs using water and carry out secondary plugging, to meet high-pressure slip-casting plugging strength.
Specifically, the underwater double-liquid high pressure slip-casting time-division is carried out to bolthole using cement mortar and accelerator by Grouting Pipe 5
Region is carried out, and the anchor pole positioned at large quantities of anchor pole regions surrounding preferentially carries out slip casting, passes through cement mortar and accelerator quick blocking base
Lithofraction gap, the barrier that intercepts water is formed, after cement mortar initial set, slip casting will be carried out positioned at the anchor pole of regional center, to obstruct underground water
The lithic drainage formed by rock crack, extruding exclude crevice water, consolidated subsoil rock stratum.
The ratio of cement mortar and accelerator is 1:1.Anchoring body uses M30 cement mortars（The ratio of mud is 0.4）, cement use
42.5R Portland cement.
When carrying out underwater double-liquid high pressure slip-casting to bolthole using cement mortar and accelerator by Grouting Pipe 5, when sighting tube 3
When beginning to flow out biliquid slurry, illustrate that bolthole middle and lower part is already filled with biliquid slurry, doubling now is carried out to sighting tube 3, use
Iron wire carries out colligation sealing；When drainpipe 6 begins to flow out biliquid slurry, illustrate that whole bolthole is already filled with biliquid slurry,
Doubling is carried out to sighting tube 3, colligation sealing is carried out with iron wire；When periphery surface bedrock fracture starts grout, stop slip casting, with up to
Periphery rock crack and secondary plugging crack purpose are filled to slurries.
Construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod that the present embodiment proposes, can be effective
Solve bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod can not pore-forming problem, and whole work progress is related to
Construction machinery is small, can the operations simultaneously of more machineries, flexibly easy to operate, low cost, speed of application is fast, and the cycle is short, to substrate rock stratum
Disturb it is small, and slurries rapid hardening closure rock crack can reinforce substrate rock stratum, can be later stage structure construction reserve grace time, ensure
Structure construction quality, the duration is saved for integral construction.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure transformation that bright specification and accompanying drawing content are made, or other related technical areas are directly or indirectly used in,
Similarly it is included within the scope of the present invention.
Claims (8)
- A kind of 1. construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod, it is characterised in that including with Lower step：Closure anchor pole aperture, and the embedded Grouting Pipe in sealing are not leaked by rapid-curing cutback cement and water；Underwater double-liquid high pressure slip-casting is carried out to bolthole using cement mortar and accelerator by Grouting Pipe, sealed with Fast Filling rapid hardening Stifled rock crack, extruding exclude rock crack water and bolthole internal water accumulation, slurry is filled bolthole and is formed with anchor pole and anchor Body reaches anti-floating effect.
- 2. construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod as claimed in claim 1, it is special Sign is, is also wrapped after described the step of carrying out underwater two fluid grouting to bolthole using cement mortar and accelerator by Grouting Pipe Include：After cement mortar and accelerator initial set, secondary high-pressure slip-casting is carried out to bolthole.
- 3. construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod as claimed in claim 2, it is special Sign is, sighting tube, drainpipe and Grouting Pipe is embedded with sealing, Grouting Pipe is used for slip casting and its end is located at bolthole Bottom；Sighting tube is used to observe slip casting situation and its end be located in the middle part of bolthole, drainpipe for draining and secondary grouting and Its end is located at the top of bolthole.
- 4. construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod as claimed in claim 3, it is special Sign is, when carrying out underwater two fluid grouting to bolthole using cement mortar and accelerator by Grouting Pipe, using the anti-slurry processes of bottom hole With observation slip casting method.
- 5. construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod as claimed in claim 1, it is special Sign is, when not leaking closure anchor pole aperture by rapid-curing cutback cement and water, anchor pole aperture is once sealed by rapid-curing cutback cement Afterwards, do not leaked using water and secondary plugging is carried out to anchor pole aperture periphery breakthrough, to meet high-pressure slip-casting plugging strength.
- 6. construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod as claimed in claim 5, it is special Sign is, anchor pole aperture is carried out before once sealing by rapid-curing cutback cement, anchor pole aperture top and periphery ponding are cleared up.
- 7. the bedrock fracture development as described in any one in claim 1 to 6 is rich in the underwater slip casting of underground water anti-float anchor rod Construction method, it is characterised in that the ratio of cement mortar and accelerator is 1:1.
- 8. construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod as claimed in claim 3, it is special Sign is, when carrying out underwater double-liquid high pressure slip-casting to bolthole using cement mortar and accelerator by Grouting Pipe, when sighting tube is opened When beginning to flow out biliquid slurry, doubling is carried out to sighting tube, colligation sealing is carried out with iron wire；When drainpipe begins to flow out biliquid slurry When, doubling is carried out to sighting tube, colligation sealing is carried out with iron wire；When periphery surface bedrock fracture starts grout, stop slip casting, with Reach slurries and fill periphery rock crack and secondary plugging crack purpose.
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| CN201710735131.8A CN107630452A (en) | 2017-08-24 | 2017-08-24 | Construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod |
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| CN201710735131.8A CN107630452A (en) | 2017-08-24 | 2017-08-24 | Construction method of the bedrock fracture development rich in the underwater slip casting of underground water anti-float anchor rod |
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| CN108331031A (en) * | 2018-02-08 | 2018-07-27 | 中建六局土木工程有限公司 | A kind of anti-float anchor rod waterproof construction method |
| CN109706935A (en) * | 2019-01-18 | 2019-05-03 | 山东建勘集团有限公司 | Anchor hole grouting for water blocking device and its working method in a kind of artesian water stratum |
| CN113503056A (en) * | 2021-08-11 | 2021-10-15 | 苏州佳固士新材料科技有限公司 | Building deformation joint leakage maintenance method |
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| CN108331031A (en) * | 2018-02-08 | 2018-07-27 | 中建六局土木工程有限公司 | A kind of anti-float anchor rod waterproof construction method |
| CN109706935A (en) * | 2019-01-18 | 2019-05-03 | 山东建勘集团有限公司 | Anchor hole grouting for water blocking device and its working method in a kind of artesian water stratum |
| CN109706935B (en) * | 2019-01-18 | 2023-10-17 | 山东建勘集团有限公司 | Anchor hole grouting water plugging device in pressure-bearing water stratum and working method thereof |
| CN113503056A (en) * | 2021-08-11 | 2021-10-15 | 苏州佳固士新材料科技有限公司 | Building deformation joint leakage maintenance method |
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Application publication date: 20180126 |